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Oral and Maxillofacial Surgery in Dogs and Cats - E-Book

Oral and Maxillofacial Surgery in Dogs and Cats - E-Book

Frank J M Verstraete | Milinda J Lommer

(2012)

Additional Information

Abstract

Oral and Maxillofacial Surgery in Dogs and Cats offers a unique, detailed, comprehensive and highly illustrated account of surgical procedures that will improve outcomes for all surgical and dental specialists. In drawing together the expertise of specialists worldwide, it will also prove indispensable for general practitioners with a dental and oral caseload. Basic principles are considered prior to in-depth treatment of surgical conditions. The book combines expertise from both human and veterinary oral surgeons to provide an authoritative reference with a strongly practical slant. It is likely to become the standard work in the field for many years.

  • Authoritative: over 30 international contributors who between them represent the peak of professional expertise in the field.
  • Unique: the only book available devoted to a surgical specialty of growing relevance.
  • Practical: profuse illustrations of the highest quality combine with step-by-step textual guidance to give clearest possible practical instruction.
  • Detailed: presents in-depth descriptions of surgical conditions and detailed surgical explanations.

Table of Contents

Section Title Page Action Price
Front cover cover
Oral and Maxillofacial Surgery in Dogs and Cats i
Copyright page iv
Table of contents v
Foreword ix
Preface xi
Acknowledgments xiii
Contributors xv
Chapter 1 Oral soft tissue wound healing 1
Definitions 1
General considerations 1
Wound healing phases 1
Inflammatory phase 1
Proliferation phase 2
Maturation/remodeling phase 2
Healing of extraction wounds 2
Factors affecting healing 3
Infection 3
Tissue perfusion and oxygenation 3
Age 3
Diabetes mellitus 3
Malnutrition 3
Current trends in wound care 4
Growth factors 4
Hyperbaric oxygen therapy 4
Skin substitutes 4
References 4
Chapter 2 Maxillofacial bone healing 7
Structure of facial bone 7
Osteoblast 7
Osteocyte 7
Osteoclast 7
Osteon (Haversian canal) 7
Fracture healing 7
Indirect bone healing 8
Direct bone healing 10
Contact healing 10
Gap healing 11
Craniomaxillofacial bone healing 11
References 13
Chapter 3 Use of antibiotics and antiseptics 15
Definitions 15
Antibiotic prophylaxis 15
Infective endocarditis 15
Prophylactic antibiotic treatment for patients with orthopedic implants 16
Prophylactic antibiotic treatment for patients with other conditions 16
Antibiotics in oral surgery 16
Extractions 16
Maxillary and mandibular fractures 17
Maxillectomy and mandibulectomy 17
Luxated or avulsed teeth 17
Antibiotic use in periodontal surgery 17
Locally delivered antibiotics 17
Side effects of antimicrobial treatment 18
Bacterial resistance to antimicrobials 18
Oral antiseptics 18
Chlorhexidine 18
Zinc ascorbate 19
Povidone-iodine 19
References 19
Chapter 4 Anesthesia and pain management 23
Definitions 23
Principles of pain management 23
Assessment of pain 23
Management of pain 24
Reducing the input 24
Reducing the result of the input 24
Minimizing facilitation 24
Blocking perception 24
Preoperative concerns 24
Induction and maintenance of anesthesia 25
General anesthetics 25
Venous access and intubation 25
Maintenance of anesthesia 25
Monitoring the patient 26
Monitoring cardiovascular function 26
Central venous pressure 27
Monitoring respiratory function 27
Temperature and renal function 28
Local anesthetics 28
Pharmacology 28
Technique 29
Neuroanatomy 30
Technique for performing regional intraoral nerve blocks 31
Middle mental nerve 31
Inferior alveolar nerve 32
Infraorbital nerve 33
Maxillary nerve 33
Major palatine foramen approach to the maxillary nerve 33
Local infiltration 34
Postoperative care 34
Use of opioids for the maintenance of analgesia 36
Oral administration 36
Transdermal administration 36
Local administration 37
Nonsteroidal antiinflammatory drugs (NSAIDs) 37
Carprofen 38
Ketorolac 38
Ketoprofen 38
Etodolac 38
Meloxicam 38
Deracoxib 38
Firocoxib 38
Tepoxalin 38
Balanced analgesia 38
References 39
Chapter 5 Enteral nutritional support 43
Therapeutic decision-making 43
Rationale for enteral nutritional support 43
Patient selection for nutritional support 43
Enteral feeding access devices 43
Nasoesophageal tubes 44
Pharyngostomy tubes 45
Esophagostomy tubes 45
Technique using curved Rochester–Carmalt, Mixter, or Schnidt forceps 45
Percutaneous feeding tube applicator technique 46
Percutaneous needle catheter technique 46
Complications 46
Gastrostomy tubes 46
Percutaneous endoscopic gastrostomy (PEG) technique 47
Blind percutaneous gastrostomy (BPG) technique 47
Surgical tube gastrostomy technique 49
Enterostomy tubes 49
Postoperative care and assessment 49
Nutrition 49
Calculation of nutritional requirements 49
Diet selection 50
Removal and replacement 50
Esophagostomy tube removal 50
Gastrostomy tube removal 50
Gastrostomy and esophagostomy tube replacement 51
Complications 51
Gastric pressure necrosis 51
Feeding tube displacement 52
Tube obstruction 52
Leakage through ostomy sites 52
Aspiration 52
Diarrhea 53
References 53
Chapter 6 Instrumentation, patient positioning and aseptic technique 55
Definitions1–3 55
Instrumentation 55
Basic oral surgery instruments 55
Scalpel handles and blades 55
Scissors 55
Tissue forceps 56
Periosteal elevators 56
Retractors 57
Needle holders 58
Ancillary instruments 59
Suction tips 59
Surgical curette 60
Surgical marker pen 60
Instrument organization 60
Power equipment 60
Rotary instruments 60
Electrosurgery and radiosurgery 61
Piezosurgery 61
Surgical loupe and headlamp 61
Aseptic technique 61
Aseptic technique in dentistry 61
Surgical infection 62
Achieving asepsis 62
Sanitization 62
Disinfection 62
Sterilization 62
Use of sterilizers 63
Sterilizers 63
Instrument preparation and packs 63
Monitoring sterility 63
Storage 63
Routine maintenance of the surgical area 64
Cleaning procedures 64
Waterlines 64
Preparation of the surgical team 64
Preparation of the patient 64
Patient positioning 65
Lateral recumbency 65
Dorsal recumbency 65
Sternal recumbency 65
Preparation of the maxillofacial skin and oral cavity 65
Pharyngeal pack and speculum 65
Preparation of the oral cavity 65
Maxillofacial skin preparation 66
Draping of the patient 66
References 67
Chapter 7 Suture materials and biomaterials 69
General principles 69
Suture characteristics 69
Physical properties 69
Handling characteristics 69
Capillarity 69
Tensile strength, knot-pull tensile strength and knot security 70
Biologic properties 70
Biofilm 70
Tissue reactivity 70
Influence of wound infection 70
Influence of pH 70
Suture materials 70
Catgut 70
Synthetic absorbable suture materials 72
Polyglycolic acid 72
Polyglactin 910 72
Polydioxanone 72
Polytrimethylene carbonate 72
Poliglecaprone 25 72
Synthetic monofilament nonabsorbable suture materials 73
Polyamide 73
Polybutester 73
Polypropylene 73
Hexafluoropropylene-VDF 73
Synthetic multifilament nonabsorbable suture materials 73
Polyester 73
Stainless steel 73
Silk 73
Suture size 73
Suture needles 74
Suture recommendations for specific tissues 74
Intraoral tissue 74
Skin and subcutaneous tissue 75
Surgical adhesive tape 75
Surgical staples 75
Tissue adhesives 75
Cyanoacrylates 75
Fibrin tissue adhesive 75
Biomaterials for hemostasis 75
Bone wax 75
Absorbable gelatin sponge 75
Oxidized cellulose 76
Oxidized regenerated cellulose 76
Microfibrillar collagen 76
Thrombin-based hemostatic agents 76
Microporous polysaccharide hemospheres 76
References 76
Chapter 8 Laser surgery 79
Definitions 79
System selection and applica8tion 80
Laser–tissue interaction 80
Mechanisms of action 80
Wavelength selection 80
Beam intensity 81
Time domains of energy delivery 82
Tissue handling 82
Beam delivery 83
Optical fibers 83
Articulated arm 83
Waveguide 83
Surgical considerations 84
Surgical approach 84
Wound healing 84
Anesthetic considerations 84
Oral and maxillofacial surgical applications 84
Correction of overlong soft palate 84
Tonsillectomy 85
Gingivectomy/gingivoplasty 85
Excision of oral mass lesions 85
Feline chronic stomatitis 85
References 87
Chapter 9 Microvascular techniques in maxillofacial surgery 89
Introduction 89
Preoperative considerations 89
Patient selection 89
Diagnostic imaging 89
Recipient vessels 89
Patient positioning 90
Donor tissue 90
Anesthetic considerations 90
Instrumentation and equipment 90
Surgical techniques 90
Transversus abdominis myoperitoneal free flap 90
Trapezius osteomusculocutanoues free flap 91
Medial saphenous fasciocutaneous free flap 91
Free vascularized medial tibial bone graft 92
Postoperative assessment and complications 92
References 92
Chapter 10 Use of the dog and cat in experimental maxillofacial surgery 93
Dogs 93
Bone turnover 93
Facial growth 94
Periodontal disease 94
Implants 94
Distraction 94
Cats 94
Nerve studies 94
References 94
Chapter 11 Principles of exodontics 97
Definitions 97
Indications for extraction 97
Periodontitis 97
Pulp necrosis 97
Dental fractures 97
Tooth resorption 98
Chronic gingivostomatitis 98
Fractured deciduous teeth 99
Persistent deciduous teeth 99
Malocclusion 99
Supernumerary teeth 99
Unerupted teeth 99
Teeth associated with pathologic lesions 100
Teeth involved in jaw fractures 100
Failed endodontic treatment 100
Contraindications for extraction 100
General contraindications 100
Systemic contraindications 100
Local contraindications 100
Clinical evaluation of teeth for extraction 100
Mobility 100
Condition of crown 100
Radiographic evaluation of teeth for extraction 101
Configuration of the roots 101
Proximity to adjacent teeth and other important structures 101
Condition of the surrounding bone 102
Patient and surgeon preparation 102
Instruments and materials 103
Instruments for creating mucogingival flaps 103
Tissue retractors 103
Instruments for sectioning teeth and removing alveolar bone 103
Dental elevators 103
Luxators 104
Root tip picks 104
Extraction forceps 105
Instruments for suturing flaps 105
Treatment planning 106
Simple versus surgical extraction 106
Principles of flap design, development and management 106
Design parameters for soft tissue flaps 106
Sulcular Incision versus excision of the free gingiva and sulcus epithelium 106
Types of gingival and mucogingival flaps 107
Technique for developing a mucogingival flap 107
Bone removal (alveolotomy or partial alveolectomy) 107
Alveoloplasty 107
Management of the alveolus 108
Principles of suturing 108
Mechanical principles involved in tooth extraction 109
Principles and techniques for tooth extraction 110
Removal of root fragments 110
Intentional root retention 111
Postoperative care and assessment 111
Pain management 111
Nutritional support 112
Oral hygiene 112
Postoperative assessment 112
References 112
Chapter 12 Simple extraction of single-rooted teeth 115
Preoperative concerns 115
General health status 115
Periodontal status 115
Surgical anatomy 115
Permanent teeth 115
Incisor teeth 115
First premolar teeth in the dog 116
Maxillary second premolar teeth in the cat 116
Maxillary first molar teeth in the cat 116
Mandibular third molar teeth in the dog 116
Deciduous teeth 117
Therapeutic decision-making 117
Simple versus surgical extraction 117
Suturing 117
Simple extraction technique 117
Elevation technique 117
Luxation technique 118
Use of forceps 119
Specific teeth 119
Incisor teeth of the cat and mandibular incisor teeth of the dog 119
Maxillary first and second incisor teeth of the dog 119
Maxillary third incisor teeth of the dog 119
Maxillary first premolar and mandibular third molar teeth of the dog and maxillary second premolar teeth of the cat 119
Maxillary first molar teeth of the cat 120
Deciduous teeth 120
Postextraction care of the alveolus 120
Postoperative care and assessment 120
Use of oral rinses 120
Dietary change 120
Recheck examination 120
Anticipating delayed wound healing 120
References 120
Chapter 13 Extraction of canine teeth in dogs 121
Indications for extraction 121
Surgical anatomy 121
Maxillary canine tooth 121
Mandibular canine tooth 122
Deciduous canine teeth 123
Therapeutic decision-making 123
Simple or surgical extraction technique 123
Selection of flap design 123
Maxillary canine tooth 123
Mandibular canine tooth – buccal approach 124
Mandibular canine tooth – lingual approach 125
Deciduous canine teeth – special considerations 125
Complications 126
Intraoperative complications 126
Postoperative complications 127
Oronasal fistula 127
Flap dehiscence 127
Maxillary lip entrapment 127
Weakening of the mandible 128
Glossoptosis 128
Prognosis 128
References 128
Chapter 14 Extraction of multirooted teeth in dogs 131
Indications for extraction 131
Preoperative concerns 131
General health status 131
Surgical anatomy (Fig. 14.2) 131
Maxillary premolar and molar teeth 131
Mandibular premolar and molar teeth 132
Adjacent structures 132
Therapeutic decision-making 132
Surgical or simple (nonsurgical) extraction 132
Flap design 132
Surgical technique 132
Extraction of maxillary second and third premolar, and mandibular second, third and fourth premolar teeth 132
Extraction of maxillary fourth premolar teeth 134
Extraction of maxillary first molar teeth 138
Extraction of maxillary second molar teeth 138
Extraction of mandibular first molar teeth 138
Complications 139
References 139
Chapter 15 Special considerations in feline exodontics 141
Indications for extraction 141
Preoperative concerns 141
General health status 141
Viral status 141
Surgical anatomy 141
Special instruments and materials 142
Instruments suitable for feline exodontics 142
Therapeutic decision-making 142
Extraction versus coronectomy (crown amputation with intentional root retention) for tooth resorption 143
Simple versus surgical extraction 143
Flap design 143
Full-mouth and premolar–molar extractions 143
Surgical technique 145
Extraction of incisor teeth 145
Extraction of maxillary canine teeth 145
Extraction of mandibular canine teeth 147
Extraction of premolar and molar teeth 147
Premolar–molar and full-mouth extractions 147
Coronectomy (crown amputation with intentional root retention) 149
Postoperative care and assessment 151
Pain management 151
Nutritional support 151
Postoperative assessment 151
Complications 151
References 151
Chapter 16 Complications of extractions 153
Definitions 153
Prevention of complications 153
Perioperative complications 153
Hemorrhage 153
Root fracture 153
Displacement of a root or root tip into the mandibular canal, nasal cavity or maxillary recess 154
Soft tissue injuries 154
Fracture of the alveolar process 155
Fracture of an instrument in the tissues 155
Fracture of the crown of an adjacent tooth 155
Mandibular fracture 155
Nerve damage 156
Air embolism 156
Postoperative complications 156
Swelling 156
Pain 156
Infection 157
Delayed healing or wound dehiscence 157
Occlusal trauma 158
Oronasal communication and fistula 158
Alveolar margin recession 158
Summary 158
References 158
Chapter 17 Principles of periodontal surgery 161
Definitions 161
Preoperative concerns 161
Client 162
Patient – health status 162
Environment 162
To treat or extract? 162
Therapeutic-decision making 163
Objectives of periodontal surgery 163
Selection of surgical technique 163
Chapter 18 Gingivectomy and gingivoplasty 167
Definitions 167
Preoperative concerns 167
Surgical anatomy 167
Instrumentation and equipment 168
Cold steel 168
Diamond or fluted carbide bur 169
Electrosurgery and radiosurgery 169
Lasers 170
Therapeutic decision-making 171
Surgical techniques 171
Postoperative care and assessment 172
Complications 173
Prognosis 174
References 174
Chapter 19 Periodontal flaps and mucogingival surgery 175
Definitions 175
Preoperative considerations 175
Periodontal flap 175
Mucogingival surgery 175
Surgical anatomy 176
Periodontal flap and mucogingival surgery 176
Landmarks 176
Differences between dogs and cats 176
Special instruments 176
Therapeutic decision-making 176
Periodontal flaps 176
Mucogingival surgery 177
Surgical techniques 177
Periodontal flap surgery 177
Apically positioned flap 177
Initial incision and releasing incisions 177
Chapter 20 Osteoconductive and osteoinductive agents in periodontal surgery 185
Definitions 185
Introduction 185
Guided tissue regeneration 185
Patient and client selection 186
Patient preparation 186
Site selection 186
Flap creation 187
Pocket preparation 187
Barrier selection 187
Graft materials 188
Membrane barriers 188
Synthetic absorbable membranes 189
Naturally-derived absorbable membranes 189
Proposed guided tissue regeneration technique using allograft and absorbable membrane (fig. 20.3) 189
Bioactive agents 190
Postoperative considerations 190
References 190
Chapter 21 Crown-lengthening 193
Definitions 193
Preoperative considerations 193
Indications 193
Surgical anatomy 194
Periodontium 194
Topographical anatomy 194
Special instruments and materials 194
Therapeutic decision-making 194
Staging 194
Prosthetic crown retention 195
Surgical techniques 195
Maxillary canine tooth5 195
Mandibular canine tooth5 195
Maxillary fourth premolar tooth 198
Postoperative care and assessment 198
Complications 198
References 199
Chapter 22 Management of periodontal trauma 201
Classification and definitions 201
Concussion 201
Subluxation 201
Luxation 201
Lateral luxation 201
Intrusive luxation 201
Extrusive luxation 202
Avulsion (exarticulation) 203
Replantation 203
Incidence of periodontal traumatic injuries 203
Preoperative concerns 204
Special instruments and materials 204
Diagnosis, treatment guidelines and techniques 204
Diagnosis 204
Treatment guidelines (Fig. 22.4) 204
Storage media for avulsed teeth 206
Prereplantation treatment of the tooth and alveolus 207
Splinting 207
Systemic antibiotic treatment 210
Endodontic treatment 210
Complications following trauma and replantation 210
Pulpal healing complications 210
Coronal discoloration 210
Pulp necrosis 210
Root canal obliteration 211
Root resorption 212
Surface resorption 212
Inflammatory resorption 212
Dentoalveolar ankylosis and replacement resorption 212
Loss of marginal bone 213
Prognosis 213
References 213
Chapter 23 Principles of endodontic surgery 217
Definitions1–3 217
Introduction 217
Therapeutic decision-making 217
Surgical endodontics versus other treatment options 217
Surgical endodontics versus re-treatment 217
Root amputation/hemisection versus surgical endodontics 218
Indications 218
Anatomical problems preventing standard normograde root canal treatment 218
Transverse fracture of the apical third of the root with pulp necrosis 218
Advanced apical root resorption 218
Endodontic instrument separation and procedural errors 218
Large unresolved periapical lesion or pain following root canal treatment 218
Contraindications for surgical root canal therapy 219
Unidentifiable cause of root canal treatment failure 219
Re-treatment is possible 219
Medical concerns 219
Anatomical limitations 219
Other dental considerations 219
References 219
Chapter 24 Apicoectomy techniques 221
Definitions1–4 221
Preoperative concerns 221
Standard root canal therapy first 221
Surgical anatomy 221
Dog 221
Maxillary canine tooth in the dog 221
Mandibular canine tooth in the dog 222
Maxillary fourth premolar tooth in the dog 222
Mandibular first molar tooth in the dog 222
Cat 224
Maxillary canine tooth in the cat 224
Mandibular canine tooth in the cat 224
Special instruments and materials 224
Surgical technique – apicoectomy and retrograde filling 224
Flap design 224
Triangular (three-cornered) flap 224
Pedicle (four-cornered) flap 227
Semilunar flap 227
Approach and exposure 227
Maxillary canine tooth in the dog 227
Mandibular canine tooth in the dog 227
Maxillary fourth premolar tooth in the dog 227
Mandibular first molar tooth in the dog 228
Bone removal and debridement 228
Apicoectomy 228
Retrograde preparation, filling and restoration 229
Choice of materials for retrofilling 229
Wound closure 230
Surgical technique – amputation of the palatal root of the maxillary fourth premolar TOOTH 230
Postoperative care and assessment 230
Complications 230
Complications related to the surgical approach 230
Damage to adjacent anatomical structures 231
Incomplete apicoectomy 231
Failure of the retrograde filling 231
Prognosis 231
References 231
Chapter 25 Principles of maxillofacial trauma repair 233
Anatomy1,2 233
General considerations 233
Initial management 233
Assessment of teeth 235
Anesthetic and surgical positioning 237
Surgical goals 237
Biomechanics 239
Mandible 239
Maxilla 239
Surgical approaches 240
Treatment planning 240
Mandibular fractures 241
Maxillary fractures 241
Summary 241
References 241
Chapter 26 Facial soft tissue injuries 243
Definitions1 243
Preoperative concerns 243
Perioperative wound management 243
Surgical anatomy 243
Surgical techniques 243
Lip lacerations and defects 244
Minor lip lacerations 244
Wedge closure 244
Square and rectangular defects 244
Flap closure 244
Rotation flap 244
Chapter 27 Surgical approaches for mandibular and maxillofacial trauma repair 259
Principles and classification 259
Principles 259
Extraoral approaches 259
Intraoral approaches 259
Approach through a traumatic wound 259
Anesthetic considerations4 259
Surgical anatomy 260
Regional anatomy 260
Surgical approaches 260
Approach to the incisive part and mandibular symphysis 260
Ventral approach to the body of the mandible 260
Ventral approach to the caudal part of the body and to the ramus of the mandible 261
Lateral approach to the zygomatic arch 262
Lateral approach to the temporomandibular joint (TMJ)4 262
Extraoral approach to the maxillae, nasal bones and frontal sinuses7 263
Intraoral approach to the maxilla2,3,5 263
Postoperative care and assessment 264
References 264
Chapter 28 Symphyseal separation and fractures involving the incisive region 265
Classification and incidence 265
Mandible 265
Maxilla and incisive bone 265
Concomitant injuries 265
Diagnosis 265
Clinical findings 265
Diagnostic imaging 265
Anesthetic considerations 266
Surgical anatomy 266
Topographical anatomy 266
Biomechanical considerations 266
Therapeutic decision-making 267
Conservative management versus surgical treatment 267
Surgical techniques 267
Separation of the mandibular symphysis 267
Cerclage wiring 267
Chapter 29 Maxillofacial fracture repair using noninvasive techniques 275
Definitions 275
Preoperative concerns 275
Surgical anatomy 275
Special instruments and materials 276
Therapeutic decision-making and techniques 276
Muzzle coaptation 276
Interdental wiring techniques 277
Ivy loop wiring technique 277
Stout loop wiring technique 277
Risdon wiring technique 277
Essig wiring technique 278
Intraoral splints combined with interdental wiring techniques 278
Application of intraoral acrylic and composite splints 279
Intraoral splints combined with cerclage wires 280
Intraoral splints for treatment of maxillary fractures 280
Intraoral splints for salvage treatment of fractures of edentulous mandibles 280
Maxillomandibular fixation – interdental bonding 281
Postoperative care and assessment 283
Postoperative care 283
Appliance removal 283
Complications 283
References 283
Chapter 30 Maxillofacial fracture repair using intraosseous wires 285
Preoperative concerns 285
Objectives 285
Biomechanical, anatomical and technical considerations 285
Lines of stress 285
Mandible 286
Maxilla 286
Anatomical considerations 286
Bone shape and thickness 286
Avoiding dental trauma 286
Blood supply and bone healing 286
Intraosseous wire fixation 286
Wire placement 286
Wire-tightening 287
Wire patterns 288
Therapeutic decision-making 288
Surgical approaches 288
Sequence of repair 288
Surgical techniques 289
Fractures involving the incisive, nasal and maxillary bones 289
Fractures of the mandible 289
Body of the mandible 289
Ramus of the mandible 290
Postoperative care and assessment 290
Activity restriction and diet 290
Postoperative assessment and wire removal 290
Complications 291
Technical failures 291
Failure of anatomic reduction 291
Incorrect wire location 291
Inadequate wire tightening 291
Inappropriate case selection 291
Wound healing complications 291
Soft tissue coverage dehiscence 291
Infection 291
Delayed/nonunion 291
Teeth 291
References 291
Chapter 31 Maxillofacial fracture repair using miniplates and screws 293
Preoperative concerns 293
Cosmetic appearance versus function 293
Other head trauma 294
Anesthetic considerations 294
Biomechanics 294
Lines of stress 294
Maxilla 294
Mandible 295
Anatomy 295
Bone shape and thickness 295
Avoiding dental trauma 295
Blood supply and bone healing 296
Rigid fixation with plates 296
Three-dimensional fixation 296
Implant purchase 296
Special instruments and materials: miniplate systems 296
Titanium versus stainless steel40–42 296
Miniplate systems 296
Screw design 296
Plate design 297
Mesh implants 297
Martin system (Walter Lorenz Surgical, Inc., Jacksonville, FL)44 297
Synthes maxillofacial system (Synthes, Paoli, PA)45,47 298
Therapeutic decision-making 299
Surgical approaches 299
Sequence of repair 299
Surgical techniques 300
Fractures involving the incisive and maxillary bones 300
Fractures involving the nasal and frontal bones 300
Fractures involving the zygomatic arch 301
Fractures involving the maxillary (medial and lateral) buttresses 301
Fractures of the mandible 302
Body of the mandible 302
Ramus of the mandible 302
Condylar process 302
Postoperative care and assessment 302
Antibiotics 302
Diet and activity restriction 302
Complications 302
Technical failures 303
Incorrect plate/location (mandible) 303
Incorrect plate/location (maxilla) 304
Plate contour 305
Screw insertion 305
Fracture gaps 305
Malocclusion 305
Soft tissue coverage/dehiscence 305
Infection 306
Delayed/Nonunion 306
Teeth 306
Acknowledgments 306
References 307
Chapter 32 Maxillofacial fracture repair using external skeletal fixation 309
Definitions 309
Preoperative concerns 309
Surgical anatomy 309
Special instruments and materials 310
Historical background 310
Components 310
Fixation pins 310
Connecting bars and clamps 311
External fixator systems 311
Linear 311
Free-form 311
External fixator systems for distraction osteogenesis 311
Therapeutic decision-making 312
Indications 312
Biomechanical considerations 313
Pin–bone interface 313
Pin selection 313
Pin placement 313
Surgical considerations 313
Open versus closed fracture reduction 313
Clinical applications of external skeletal fixation 313
Fractures of the mandible 313
Fractures of the maxilla 314
Other 314
Postoperative care and assessment 315
Aftercare 315
Radiography 315
Fixator removal 315
Complications 317
References 317
Chapter 33 Fractures and luxations involving the temporomandibular joint 321
Definitions 321
Clinical presentation 321
History and physical findings 321
Oral examination 321
Anesthetic considerations 321
Pre-anesthesia evaluation 321
Diagnostic imaging 321
Radiographic findings 321
Computed tomography 323
Surgical anatomy13,14 323
Therapeutic decision-making 323
Differential diagnoses 323
Closed versus open reduction of subluxations and luxations 325
Nonsurgical versus surgical treatment of condylar and pericondylar fractures 325
Closed reduction and nonsurgical techniques 325
Closed reduction of luxations 325
Nonsurgical treatment of minimally displaced fractures 326
Surgical techniques 326
Open reduction of luxations 326
Condylectomy19,26 327
Other techniques 327
Luxations 327
Condylar and subcondylar fractures 327
Postoperative care and assessment 327
Immobilization 327
Physiotherapy 327
Prognosis 328
Conservative treatment 328
Condylectomy 328
Complications 328
Intraoperative complications 328
Postoperative complications 328
Degenerative joint disease 328
Temporomandibular joint ankylosis 329
Zygomaticomandibular ankylosis 329
References 331
Chapter 34 Maxillofacial fracture complications 333
Definitions 333
Preoperative concerns 333
Therapeutic decision-making 333
Maxillofacial fracture complications 333
Age-related complications 333
Juvenile patients 333
Geriatric patients 334
Complications related to adjacent anatomical structures 335
Trauma to the inferior alveolar nerve and blood vessels 335
Oronasal fistula 335
Trauma to the nasal passages and maxillary recesses 335
Complications related to implants 336
Implant exposure, loosening, and migration and implant failure 336
Healing complications 336
Delayed union and nonunion 336
Malunion 337
Infectious complications 337
Wound infection 337
Osteomyelitis and bone sequestra 337
Complications related to teeth 338
Malocclusion 338
Dental pathology 338
Complications associated with extensive callus formation 340
Postoperative care and assessment 341
Prognosis 341
References 341
Chapter 35 Biologic basis of cleft palate and palatal surgery 343
Definitions 343
Palatogenesis 343
Palatal clefts 343
Congenital clefts 344
Genetic factors 344
Environmental teratogens 344
Mechanical forces 344
Induced clefts 344
Surgical correction 345
Palatoplasty in humans 345
von Langenbeck technique 345
V-Y push-back procedure 345
Two-flap palatoplasty 345
Experimental research in dogs and cats 345
Wound contraction 345
Two-flap palatoplasty 346
von Langenbeck technique 346
Studies in cats 348
References 348
Chapter 36 Cleft palate repair techniques 351
Definitions 351
Preoperative concerns 351
Anesthetic considerations 351
Surgical anatomy 352
Special instruments and materials 352
Therapeutic decision-making 352
Surgical techniques 352
Dentoalveolar cleft and cleft lip repair 352
Cleft hard palate repair 355
von Langenbeck technique 355
Overlapping-flap technique 355
Cleft soft palate repair 357
Double-layer appositional technique 357
Bilateral overlapping single-pedicle flap technique 357
Repair of unilateral hypoplasia of the soft palate 357
Bilateral hypoplasia of the soft palate 357
Postoperative care and assessment 360
Complications 360
Prognosis 360
References 360
Chapter 37 Repair of acquired palatal defects 363
Definitions 363
Preoperative concerns 363
Anesthetic considerations 363
Surgical anatomy 363
Special instruments and materials 364
Therapeutic decision-making 365
Surgical techniques 365
Primary closure of a midline palatal fracture/separation11 365
Single-layer techniques 365
Vestibular flaps 365
Transposition flaps 366
Advancement flaps 367
Partial-thickness transposition flaps 367
Tongue flaps 367
Split palatal U-flap 367
Island palatal flap 368
Double-layer techniques 368
Vestibular-mucosal/perifistula/hard palatal flaps 369
Miscellaneous techniques 370
Myoperitoneal microvascular free flaps 370
Obturators 370
Postoperative care and assessment 372
Complications 372
Prognosis 372
References 372
Chapter 38 Clinical staging and biopsy of maxillofacial tumors 373
General considerations 373
Clinical staging 373
Primary tumor 373
Diagnostic imaging of oral tumors 374
Regional lymph nodes 374
Distant metastasis 375
Histopathologic staging 375
Principles of oral and maxillofacial biopsy 375
Developing the biopsy strategy 375
Open and closed biopsy 376
Open biopsy procedures 377
Soft tissue biopsy 377
Hard tissue biopsy 377
Osteotome technique 377
Michele trephine technique37 377
Tissue handling and submission of the specimen 378
Frozen sections 378
Postoperative considerations 379
References 379
Chapter 39 Clinical–pathologic correlations 381
Clinical–pathologic correlations 381
Case 1 381
Case 2 382
Case 3 383
References 385
Chapter 40 Clinical behavior of nonodontogenic tumors 387
General considerations 387
Incidence 387
Dogs 387
Cats 387
Signalment 387
Etiology and risk factors 388
Squamous cell carcinoma 388
Mandibular/maxillary squamous cell carcinoma in dogs 389
Lingual/sublingual squamous cell carcinoma in dogs 389
Tonsillar squamous cell carcinoma in dogs 389
Papillary squamous cell carcinoma of young dogs 390
Mandibular/maxillary squamous cell carcinoma in cats 390
Lingual/sublingual squamous cell carcinoma in cats 391
Tonsillar squamous cell carcinoma in cats 392
Malignant melanoma 392
Malignant melanoma in dogs 392
Malignant melanoma in cats 393
Fibrosarcoma 394
Mandibular/maxillary fibrosarcoma 394
Histologically low-grade, biologically high-grade fibrosarcoma 395
Bone tumors 395
Osteosarcoma 395
Multilobular osteochondrosarcoma 396
Other nonodontogenic tumor types 396
Undifferentiated malignant tumor of young dogs 396
Extramedullary plasmacytoma 397
Oral lymphoma 397
Miscellaneous tumor types 397
Merkel cell tumor 397
Mast cell tumor 398
Granular cell myoblastoma 398
Hemangiosarcoma 398
Papillomatosis 398
Salivary gland tumors 398
References 399
Chapter 41 Clinical behavior of odontogenic tumors 403
General considerations 403
Epithelial tumors 404
Ameloblastoma 404
Central (or intraosseous) ameloblastoma 404
Clinical features 404
Chapter 42 Non-neoplastic proliferative oral lesions 411
Gingival hyperplasia and related lesions 411
General considerations 411
Disease entities 411
Gingival hyperplasia 411
Drug-induced gingival enlargement 411
Focal fibrous hyperplasia 412
Pyogenic granuloma 412
Peripheral giant cell granuloma 412
Reactive exostosis 412
Therapeutic decision-making 412
Postoperative care and assessment 413
Prognosis 413
Traumatic buccal or sublingual mucosal hyperplasia 413
Chapter 43 Principles of oral oncologic surgery 423
Introduction 423
Diagnostic imaging 423
Nomenclature 423
Surgical treatment objectives 424
Treatment planning 424
Anesthesia and analgesia 424
Surgical excision 424
Patient positioning 426
Management of adjacent teeth 427
Preservation of local blood supply 427
Tension-free closure 427
Anticipation and prevention of complications 427
Hemorrhage 427
Infection 428
Dehiscence 428
Postoperative dysfunction 428
References 428
Chapter 44 Surgical treatment of tongue, lip and cheek tumors 431
Definitions1,2 431
Surgical anatomy 431
Tongue2 431
Lips and cheeks 431
Lymphatic drainage3 432
Therapeutic decision-making 432
Tongue tumors 432
Lip and cheek tumors7 432
Surgical techniques – glossectomy 433
Marginal excision 433
Wedge glossectomy (Fig. 44.1) 433
Transverse glossectomy (Fig. 44.2) 433
Longitudinal glossectomy (Fig. 44.3) 433
Surgical techniques – excision of lip and cheek tumors and reconstruction7 433
Techniques for the upper lip and cheek 433
Wedge excision (Fig. 44.4 and 26.3) 433
Rectangular excision and Y-closure (Fig. 44.5) 433
Full-thickness labial advancement technique (Fig. 44.6) 433
Buccal rotation flap (Fig. 44.7) 433
Lower labial pedicle rotation flap8 (Fig. 44.8) 433
Buccolabial pedicle flap (Fig. 44.9) 434
Upper labial pull-down technique (Fig. 44.10) 441
Transposition skin flap (Fig. 44.11) 441
Techniques for the lower lip 442
Full-thickness labial advancement technique (Fig. 44.12) 442
Upper labial pedicle rotation flap (Fig. 44.13) 442
Techniques for the lower lip, upper lip and cheek reconstruction 447
Labial buccal reconstruction with inverse tubed skin flap7 (Fig. 44.14) 447
Free microvascular skin flap grafted with oral mucosa9 447
Complications 447
Complications following glossectomy 447
Complications following excision of lip and cheek tumors and reconstruction 447
Prognosis 447
Prognosis following glossectomy 447
Prognosis following excision of lip and cheek tumors and reconstruction 449
References 449
Chapter 45 Maxillectomy techniques 451
Definitions 451
Indications 451
Background 451
Preoperative concerns 451
Diagnosis 451
Client communications 451
Preoperative management 452
Antibiotics 452
Oral cavity disinfection 452
Anesthetic considerations 452
Preemptive analgesia 452
Patient positioning 452
Surgical anatomy5 452
Therapeutic decision-making 452
Types of osseous excisions 452
Surgical technique 453
General surgical principles 453
Surgical plan23–26,33 453
Surgical margins 453
Surgical incision 453
Management of adjacent teeth 454
Ostectomy and osteoplasty 454
Flap design 456
General principles 456
Vestibular mucosal–submucosal flap 456
Alveolar mucosal–periosteal transposition flap 457
Palatal mucoperiosteal flap 458
Surgical defect closure 458
Incisivectomy and rostral maxillectomy 459
Central and caudal maxillectomy 460
Orbitectomy2 461
Additional technical considerations 461
Postoperative care and assessment 461
Extubation 461
Pain management 461
Nutritional support 462
Postoperative patient appearance23,26 462
Homecare and follow-up 462
Complications 462
Intraoperative complications 462
Postoperative complications 464
Prognosis 464
References 464
Chapter 46 Mandibulectomy techniques 467
Definitions 467
Indications 467
Background 467
Preoperative concerns 467
Diagnosis 467
Client communication 467
Therapeutic decision-making 467
Types of osseous excisions 467
Preoperative management 469
Patient positioning 469
Dorsal and lateral recumbency 469
Sternal recumbency 469
Surgical anatomy26–28 469
Surgical technique 471
General surgical principles21–23 471
Surgical plan 471
Surgical margins 471
Surgical incision 471
Management of adjacent teeth 471
Ostectomy and osteoplasty 471
Flap design 472
General principles 472
Vestibular mucosal–submucosal flap 472
Surgical defect closure 472
Closure at the rostral mandible 472
Closure at the mandibular body 472
Unilateral rostral mandibulectomy 472
Bilateral rostral mandibulectomy 473
Central or segmental mandibulectomy 473
Caudal mandibulectomy 473
Unilateral (total) mandibulectomy 475
Stabilization of mandibular segments 475
Postoperative care and assessment 476
Postoperative patient appearance21–23 476
Homecare and follow-up 476
Complications19–23 476
Intraoperative complications 476
Dehiscence 477
Functional complications 477
Malocclusion 477
Prehension 477
Drooling 477
Tongue protrusion 477
Ranula 477
Dental calculus 477
Local tumor recurrence 478
Prognosis 478
Other considerations 478
Extent of mandibulectomy 478
Subtotal mandibulectomy 478
Teeth rostral to ostectomy 478
References 478
Chapter 47 Clinical behavior and management of odontogenic cysts 481
Introduction 481
Dentigerous cyst 481
Pathophysiology 481
Clinical features 481
Management 482
Periapical cyst 482
Pathophysiology 482
Clinical features 482
Management 483
Odontogenic keratocyst-like lesion (OKC-like) – keratocystic odontogenic tumor 484
Pathophysiology 484
Clinical features 484
Management 485
References 485
Chapter 48 Advanced maxillofacial reconstruction techniques 487
Definition 487
Therapeutic decision-making 487
Surgical anatomy and surgical techniques 487
Caudal auricular axial-pattern flap 487
Superficial temporal axial-pattern flap 488
Application and surgical closure 488
Other techniques 491
Rectus abdominis myoperitoneal flap 491
Skin grafts 491
Angularis oris axial-pattern flap 491
Bone reconstruction 492
Postoperative care and assessment 493
Immediate postoperative care 493
Assessment – viability of axial-pattern flaps 493
References 493
Chapter 49 Principles of salivary gland surgery 495
Definitions 495
Surgical anatomy 495
Parotid gland 495
Zygomatic gland 495
Mandibular and sublingual glands 495
Molar glands in the cat 496
Other salivary glands 496
Examination techniques 496
Diagnostic imaging 496
Salivary gland biopsy 497
Surgical diseases of the salivary glands 497
Salivary gland and duct injury 497
Salivary fistula 497
Sialoliths 497
Salivary gland neoplasia 498
Surgical excision of the mandibular gland 498
Surgical excision of the parotid gland 499
Surgical excision of the zygomatic gland 499
Salivary gland necrosis 499
Complications 499
References 499
Chapter 50 Surgical treatment of sialoceles 501
Definitions 501
Pathogenesis and epidemiology 501
Preoperative assessment 504
Diagnosis of sialocele 504
Therapeutic decision-making 504
Objectives of surgery 504
Surgical anatomy 504
General anatomy 504
Topographical anatomy 505
Surgical techniques 505
Lateral approach to excision of mandibular and sublingual glands17 505
Ventral approach to excision of mandibular and sublingual glands8,18 505
Advantages and disadvantages of lateral versus ventral approaches for sialoadenectomy: results of two techniques to excise the mandibular and sublingual salivary glands 508
Intraoral marsupialization of a ranula 509
Zygomatic sialoadenectomy 509
Postoperative care, assessment and complications 509
Excision of the mandibular and sublingual salivary glands 509
References 510
Chapter 51 Cheiloplasty 511
Lip fold resection 511
Clinical characteristics 511
Associated conditions 512
Chapter 52 Inferior labial frenoplasty and tight-lip syndrome 515
Definitions 515
Preoperative concerns 515
Surgical anatomy 515
Inferior labial frenoplasty 515
Clinical presentation 515
Chapter 53 Management of maxillofacial osteonecrosis 519
Definitions 519
Preoperative concerns 519
Etiopathogenesis 519
Therapeutic decision-making 519
Factors to consider in the surgical management of maxillofacial osteonecrosis 520
General principles in the surgical management of maxillofacial osteonecrosis 521
Postoperative care and assessment 522
Complications 522
Prognosis 524
References 524
Chapter 54 Management of unerupted teeth 525
Definitions 525
Surgical anatomy 525
Location of an unerupted tooth 525
Therapeutic decision-making 525
Surgical techniques 526
Surgical exposure 526
Orthodontic management 527
Extraction of unerupted teeth 527
Postoperative care 528
Complications 528
References 529
Chapter 55 Temporomandibular joint dysplasia 531
Definitions 531
Background 531
Functional anatomy of the temporomandibular joint4,13,14 531
Pathophysiology 531
Clinical presentation 532
Signalment and history 532
Physical examination 532
Manipulation of the mandibles 532
Diagnostic imaging 532
Radiographic findings 532
Computed tomography and magnetic resonance imaging 533
Surgical anatomy13,22 533
Therapeutic decision-making 534
Differential diagnoses 534
Surgical technique and unilateral or bilateral surgery 534
Surgical techniques 534
Partial zygomatic arch excision3,4 534
Reduction of the coronoid process height 536
Mandibular condylectomy 537
Postoperative care and assessment 537
Complications 537
Prognosis 537
References 537
Chapter 56 Correction of overlong soft palate 539
Surgical anatomy 539
Special instruments and materials 539
Therapeutic decision-making 539
Indications for surgery 540
Surgical technique 540
Postoperative care and assessment 541
Prognosis 541
References 542
Chapter 57 Pharyngotomy and pharyngostomy 543
Definitions 543
Background 543
Indications and contraindications 543
Chapter 58 Oral approaches to the nasal cavity and nasopharynx 547
Surgical anatomy 547
Special instruments and materials 547
Therapeutic decision making 547
Indications for surgery 547
Surgical technique 548
Control of hemorrhage 548
Ventral approach to the rostral nasal passages 549
Ventral approach to the caudal nasal passages and nasopharynx 549
Postoperative care and assessment 549
Prognosis 549
References 551
Chapter 59 Tonsillectomy 553
Surgical anatomy 553
Special instruments and materials 553
Therapeutic decision-making 553
Indications for surgery 553
Surgical technique 554
Postoperative care and assessment 555
Prognosis 555
References 555
Index 557
A 557
B 558
C 558
D 558
E 559
F 559
G 560
H 561
I 561
J 561
K 561
L 561
M 562
N 563
O 563
P 564
R 565
S 565
T 566
U 567
V 567
W 567
X 567
Y 567
Z 567