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Endodontics - E-Book

Endodontics - E-Book

Mahmoud Torabinejad | Ashraf Fouad | Richard E. Walton

(2014)

Additional Information

Book Details

Abstract

ENDODONTICS: PRINCIPLES AND PRACTICE, 4th Edition is an essential scientific and clinical building block for understanding the etiology and treatment of teeth with pulpal and periapical diseases. You'll easily understand and learn procedures through step-by-step explanations accompanied by full-color illustrations.

  • Comprehensive coverage of normal structures, disease, diagnosis and treatment planning, periodontic endodontic interrelationship, trauma, local anesthesia, root canal instruments, access preparations, cleaning and shaping, obturation, temporization, retreatment, endodontic surgery, endodontic outcomes, internal bealching, vital pulp therapy, geriatric endodontics, vertical fractures, and more gives you a complete understanding of modern endodontics!
  • Distinguished experts in the field of endodontics share their experience regarding each topic discussed.
  • Current references incorporate evidence-based information that is relevant to your practice.
  • Advice for the prevention and treatment of accidental procedural errors ensures you are prepared to safely care for your patients.
  • Outlines and Learning Objectives at the beginning of each chapter provide quick reference for specific topics.
  • High-quality, full-color illustrations allow you to see the procedures described.
  • Newly reorganized content now simulates the order in which procedures are performed in clinical settings.

Table of Contents

Section Title Page Action Price
Front cover cover
Inside front cover ifc1
Endodontics i
Copyright page iv
Contributors v
Preface viii
Videos x
Chapter Review Questions x
Video Contents xi
Table of Contents xii
1 The biology of dental pulp and periradicular tissues 1
Chapter Outline 1
Learning Objectives 1
Development of the Dental Pulp 1
Early Development of Pulp 1
Root Formation 3
Formation of Lateral Canals and Apical Foramen 4
Lateral Canals 4
Apical Foramen 5
Formation of the Periodontium 5
Anatomic Regions and Their Clinical Importance 5
Pulp Function 6
Induction 6
Formation 6
Nutrition 7
Defense 7
Sensation 8
Morphology 8
Cells of the Dental Pulp 8
Odontoblasts 8
Stem Cells (Preodontoblasts) 8
Fibroblasts 9
Cells of the Immune System 10
Extracellular Components21 11
Fibers 11
Noncollagenous Matrix22 11
Calcifications 11
Blood Vessels 11
Afferent Blood Vessels (Arterioles) 12
Efferent Blood Vessels 12
Lymphatics26,27 12
Vascular Physiology 12
Vascular Changes During Inflammation30 13
Innervation 14
Neuroanatomy 15
Pulpal and Dentinal Nerves 15
Developmental Aspects of Pulp Innervation 16
Pathways of Transmission from Pulp to Central Nervous System 16
Theories of Dentin Hypersensitivity 16
Age Changes in the Dental Pulp and Dentin 17
Repair and Regeneration 17
Periradicular Tissues 17
Cementum 17
Cementoenamel Junction 18
Periodontal Ligament 18
Alveolar Bone 19
References 20
2 Protecting the pulp and promoting tooth maturation 21
Chapter Outline 21
Learning Objectives 21
Definitions 21
Pulp Protection 21
Vital Pulp Therapy 21
Regeneration, Revascularization, and Revitalization 22
Iatrogenic Effects on the Dental Pulp 22
Local Anesthesia 22
Cavity/Crown Preparation 23
Heat 23
Cavity Depth/Remaining Dentin Thickness 24
Cavity Drying and Cleansing12 24
Etching Dentin/Smear Layer Removal27-29 25
Other Restorative Procedures 25
Postrestorative Hypersensitivity36,37 25
Dental Materials 26
Microleakage42-44 26
Cytotoxicity 26
Depth of Preparation 26
Desiccation by Hygroscopy50 26
Specific Materials 26
Zinc Oxide–Eugenol18,51-53 26
Restorative Resins58-60 26
Glass Ionomer Cements 27
Amalgam 27
Orthodontic Tooth Movement 27
Vital Tooth Bleaching 27
Protecting the Pulp From the Effect of Materials 27
Cavity Varnishes, Liners, and Bases 27
Vital Pulp Therapies 27
Indirect Pulp Capping 28
Direct Pulp Capping 28
Pulpotomy 28
The Open Apex94,95 28
Diagnosis and Case Assessment96 28
Treatment Planning 30
Apexogenesis97-102 30
Technique 31
Apexification101,111 32
Technique 33
Restoration After Apexification112,117 33
Success or Failure of Apexification 33
Tissue Engineering and Regenerative Endodontics 33
Technique 34
References 35
3 Endodontic microbiology 37
Chapter Outline 37
Learning Objectives 37
Microbial Causation of Apical Periodontitis 37
Routes of Root Canal Infection 37
Dentinal Tubules 37
Direct Pulp Exposure 38
Periodontal Disease 38
Anachoresis 39
Microbiota of Endodontic Infections 39
Primary Intraradicular Infection 39
Gram-Negative Bacteria 39
Gram-Positive Bacteria 39
As-Yet-Uncultivated Bacterial Phylotypes 39
Complexity of Endodontic Polymicrobial Infections 41
Other Microorganisms in Endodontic Infections 41
Symptomatic Infections 41
Ecology of the Endodontic Microbiota 41
Oxygen Tension and Redox Potential 41
Available Nutrients 41
Bacterial Interactions 42
Apical Periodontitis as a Biofilm-Related Disease 42
Persistent and Secondary Endodontic Infections 43
Bacteria at the Root Canal–Filling Stage 43
Microbiota in Root Canal–Treated Teeth 43
Extraradicular Infections 44
References 45
4 Pulp and periapical pathosis 48
Chapter Outline 48
Learning Objectives 48
Irritants 48
Mechanical Irritants 48
Chemical Irritants 49
Microbial Irritants 50
Pulpal Pathosis 51
Inflammatory Process 52
Immunologic Responses 52
Lesion Progression 53
Classification of Pulpal Diseases 53
Normal Pulp 53
Reversible Pulpitis 53
Symptoms 53
Treatment 54
Irreversible Pulpitis 54
Symptoms 54
Tests and Treatment 54
Hyperplastic Pulpitis 55
Hard Tissue Changes Caused by Pulpal Inflammation 55
Pulp Calcification 55
Internal (Intracanal) Resorption 55
Pulpal Necrosis 56
Symptoms 56
Tests and Treatment 56
Previously Initiated Root Canal Therapy 56
Periapical Pathosis 56
Nonspecific Mediators of Periapical Lesions 56
Specific Mediators of Periapical Lesions 57
Lesion Progression 58
Classification of Periapical Lesions 58
Normal Periapical Tissues 58
Symptomatic Apical Periodontitis 58
Etiology 58
Signs and Symptoms 58
5 Diagnosis, treatment planning, and systemic considerations 68
Chapter Outline 68
Learning Objectives 68
Diagnosis 69
Chief Complaint 69
Health History 70
Health and Medical History 70
Antibiotic Prophylaxis 71
Dental History 71
History of the Present Complaint 71
The Pain Referral Phenomenon 72
Nonodontogenic Pain 73
Objective Examination 73
Extraoral Examination 74
Intraoral Examination 74
Soft Tissue 74
Dentition 74
Clinical Tests 75
Control Teeth 75
Percussion and Palpation of Supporting Tissues 76
Pulp Vitality Tests 76
Selecting the Appropriate Pulp Test 76
Cold Tests 76
Heat Tests 77
Electrical Pulp Testing 77
Significance of Thermal Tests 78
Blood Flow Determination 78
Periodontal Examination 78
Probing 79
Mobility 79
Radiographic Examination 79
Periapical Lesions 79
Pulpal Lesions 80
Additional Diagnostic Procedures 81
Caries Removal 81
Selective Anesthesia 81
Bite Test 81
Transillumination 81
Reaching a Diagnosis 81
The Difficult Diagnosis 82
Treatment Planning 83
Restorability 83
Specific Treatments 83
Pulpitis 83
Normal or Reversible Pulpitis 83
Irreversible Pulpitis 83
Necrosis 83
Periapical Diagnosis 83
Normal 83
Symptomatic Apical Periodontitis 83
Asymptomatic Apical Periodontitis 83
Acute Apical Abscess 83
Chronic Apical Abscess 83
Condensing Osteitis 83
Extraction as an Alternative to Endodontic Therapy 84
Treatment Planning Considerations 84
Diagnosis 84
Endodontic-Periodontal Status 84
Resorption 84
Radiographs 85
Procedural Difficulties 85
Health and Medical History 85
Physical Limitations 85
Restorative Considerations 85
Anatomy 85
Pulp Chamber 85
Canal Calcification (Calcific Metamorphosis) 85
Root Curvature 85
Number of Canals 85
Root Length 86
Tooth Location 86
Degree of Apical Closure 86
Unusual Anatomy 86
Systemic Considerations 86
Systemic Diseases that May Influence Endodontic Pathosis or Its Treatment 88
Diabetes Mellitus 88
Hypertension 89
Risk for Osteoradionecrosis or Osteonecrosis of the Jaw 89
Viral Infections 90
HIV/AIDS 90
Herpes Viruses 90
Sickle Cell Anemia 90
Smoking 90
Genetic Predisposition 90
Endodontic Disease May Initiate or Contribute to Systemic Diseases 90
Acute Endodontic Infections 91
Chronic Endodontic Infections 91
References 92
6 Interaction between the general dentist and the endodontist 95
Chapter Outline 95
Learning Objectives 95
Specialty Qualifications in the United States 95
Endodontic Practice Figures in the United States 96
Communication between Endodontists and General Dentists 96
Standards of Endodontic Care and Case Documentation 96
Identification and Classification of Cases 97
The AAE Case Selection System 97
I. Referral Before Treatment 97
Complex Medical and Behavioral Issues 97
Emotional and Physical Limitations 97
Complex Diagnosis 97
Radiographic Difficulties 100
Position of a Tooth in the Arch 100
Local Anesthesia Difficulties 100
Rubber Dam Isolation 100
Morphologic Difficulties 100
Pulp Chamber and Root Canal Calcification 100
Difficult Access and Anatomy of the Tooth Involved 100
Existing Restorations 101
Cases with Root Resorption 101
Endodontic Periodontal Lesion 101
Traumatic Injuries, Retreatments, and Surgeries 101
II. Referral During Treatment 104
Flare-ups 104
Procedural Accidents 104
III. Referral After Treatment 104
Pain 104
Pathosis 104
Sinus Tract 105
What is Expected of a General Practitioner 105
What is Expected of an Endodontist 105
References 105
7 Endodontic-periodontic interrelationship 106
Chapter Outline 106
Learning Objectives 106
Pathways of Communication between the Dental Pulp and the Periodontium 107
Apical Foramen 107
Lateral Canals 108
Dentinal Tubules 108
Effect of Pulpal Diseases and Endodontic Procedures on the Periodontium 110
Etiology 110
Pathogenesis 111
Effect 111
Effect of Periodontal Disease and Procedures on the Pulp 113
Etiology 113
Pathogenesis 113
Effect 114
Clinical and Radiographic Tests for Diagnosis of Endodontic-Periodontic Lesions 115
Subjective Signs and Symptoms 115
Visual Examination 115
Radiographic Examination 115
Clinical Tests 115
Vitality Tests 115
Palpation and Percussion 116
Probing 116
Classification and Differential Diagnosis of Endodontic- Periodontic Lesions 116
Primary Periodontal Defects of Pulpal (Endodontic) Origin 116
Treatment and Prognosis 116
Primary Periodontal Defects of Periodontic Origin 116
Treatment and Prognosis 117
Primary Periodontal Defects of Endodontic-Periodontic Origin (True Combined Lesions) 117
Treatment and Prognosis 118
Secondary Endodontic-Periodontic Defects 118
References 119
8 Longitudinal tooth fractures 121
Chapter Outline 121
Learning Objectives 121
Incidence 121
Categories 121
Craze Lines 122
Fractured Cusp 123
Incidence 123
Pathogenesis 123
Clinical Features 123
Etiologies 124
Diagnosis 125
Subjective Findings 125
Objective Tests 125
Radiographic Findings 125
Other Findings 125
Treatment 125
Prognosis 125
Prevention 125
Cracked Tooth 125
Incidence 126
Pathogenesis 126
Clinical Features 126
Etiologies 126
Diagnosis 127
Subjective Findings 127
Objective Tests 127
Radiographic Findings 127
Other Findings 127
Treatment 128
Further Examination 129
Restoration 129
Prognosis 130
Prevention 130
Split Tooth 130
Incidence 131
Pathogenesis 131
Clinical Features 131
Etiologies 131
Diagnosis 132
Subjective Findings 132
Objective Findings 132
Radiographic Findings 132
Other Findings 132
Treatment 132
Prognosis 133
Prevention 133
Vertical Root Fracture 133
Incidence 133
Pathogenesis 133
Clinical Features 133
Etiologies 134
Diagnosis 135
Subjective Findings 135
Objective Tests 135
Radiographic Findings 135
Dental History 136
Other Findings 136
Fracture Characteristics 137
Treatment 138
Prognosis 138
Prevention 138
References 138
9 Local anesthesia 142
Chapter Outline 142
Learning Objectives 142
Factors Affecting Endodontic Anesthesia 142
Apprehension and Anxiety 142
Fatigue 143
Tissue Inflammation 143
Previous Unsuccessful Anesthesia 143
Initial Management 143
Psychological Approach 143
Topics Related to Injection Pain 143
Obtaining the Patient’s Confidence 143
Topical Anesthetic 143
Solution Warming 143
Needle Insertion 143
Small-Gauge Needles 143
Slow Injection 143
Two-Stage Injection 144
Gender Differences in Pain 144
When to Anesthetize 144
Adjunctive Pharmacologic Therapy 144
Conventional Pulpal Anesthesia for Restorative Dentistry 144
Mandibular Anesthesia for Restorative Dentistry 145
Lidocaine with Epinephrine and Vasoconstrictors 145
Anesthetic Factors Associated with the Inferior Alveolar Nerve Block 145
Lip Numbness 146
Soft Tissue Anesthesia 146
Onset of Pulpal Anesthesia 146
Duration 146
Success 146
Alternative Attempts to Increase Anesthetic Success 146
Increasing the Volume 146
Increasing the Epinephrine Concentration 146
Alternative Solutions 146
2% Mepivacaine with 1 : 20,000 Levonordefrin, 4% Prilocaine with 1 : 200,000 Epinephrine, and Plain Solutions (3% Mepivacaine and 4% Prilocaine) 146
4% Articaine with Epinephrine for Inferior Alveolar Nerve Blocks 146
Long-Acting Agents 146
Buffered Lidocaine 146
Alternative Injections and Locations 146
Gow-Gates and Vizarani-Akinosi Techniques 146
Incisive Nerve Block/Infiltration at the Mental Foramen 146
Lidocaine Infiltration Injections 146
Articaine Infiltration Injections 147
Evaluating Mechanisms of Failure with the Inferior Alveolar Nerve Block 147
Accuracy of Needle Placement 147
Needle Deflection and Needle Bevel 147
Accessory Innervation 147
Cross-Innervation 147
Red Hair 147
Methods to Increase Success of the Inferior Alveolar Nerve Block 147
Infiltrations of Articaine After an Inferior Alveolar Nerve Block 147
Intraosseous Anesthesia After an Inferior Alveolar Nerve Block 147
Periodontal Ligament Anesthesia After an Inferior Alveolar Nerve Block 147
Injection Speed and Success 147
Pain and Inflammation 147
Maxillary Anesthesia for Restorative Dentistry 147
Anesthesia-Related Factors 147
Lip/Cheek Numbness or Dead Feeling of the Teeth 148
Success 148
Onset of Pulpal Anesthesia 148
Duration of Pulpal Anesthesia 148
Alternative Anesthetic Solutions 148
Plain Solutions of Mepivacaine and Prilocaine 148
4% Prilocaine with 1 : 200,000 Epinephrine, 2% Mepivacaine with 1 : 20,000 Levonordefrin, and 4% Articaine with 1 : 100,000 Epinephrine 148
Bupivacaine with Epinephrine 148
Increasing the Duration of Pulpal Anesthesia 148
Increasing the Volume of Solution 148
Increasing the Epinephrine Concentration 148
Repeating an Infiltration after 30 Minutes 148
Alternative Injection Techniques 148
Pain, Inflammation, and Anxiety 148
Supplemental Anesthesia for Restorative Dentistry in the Mandible and Maxilla 148
Indications 148
Infiltration 149
Additional Infiltration of Lidocaine in the Maxilla 149
Infiltration of Articaine in the Mandible 149
Intraosseous Anesthesia 149
Technique for the Stabident System 150
Perforator “Breakage” 151
Injection Discomfort 151
Selection of Perforation Site 151
Anesthetic Agents 151
Onset of Anesthesia 151
Success 151
Failure 151
Duration 151
Postoperative Pain and Problems 151
Systemic Effects 151
Medical Contraindications 151
Precautions 151
Periodontal Ligament Injection 151
Technique 151
Mechanism of Action 152
Injection Discomfort in Asymptomatic Patients 152
Onset of Anesthesia 152
Success in Asymptomatic Teeth 152
Duration in Asymptomatic Teeth 154
Postoperative Discomfort in Asymptomatic Teeth 154
Selective Anesthesia 154
Systemic Effects 154
Other Factors 154
Damage to the Periodontium 154
Damage to the Pulp 154
Damage to Primary Teeth 154
Precautions 154
Anesthesia Difficulties in Endodontics 154
Success of the Inferior Alveolar Nerve Block with Symptomatic Irreversible Pulpitis 155
Success of Maxillary Molar Infiltration with Irreversible Pulpitis 155
Asymptomatic Irreversible Pulpitis versus Symptomatic Irreversible Pulpitis 155
Supplemental Techniques for Mandibular Teeth in Endodontics 155
Supplemental Buccal Infiltration of Articaine 155
Supplemental Intraosseous Injections 155
Supplemental Periodontal Ligament Injections 155
Supplemental Intrapulpal Injection 156
Indications 156
Advantages and Disadvantages 156
Mechanism of Action 156
Technique 156
Anesthetic Management of Pulpal or Periapical Pathoses 156
Symptomatic Irreversible Pulpitis 156
General Considerations 157
Mandibular Posterior Teeth 157
Mandibular Anterior Teeth 157
Maxillary Posterior Teeth 157
Maxillary Anterior Teeth 157
Symptomatic Pulp Necrosis 157
Asymptomatic Pulp Necrosis 157
Anesthesia for Surgical Procedures 158
Incision for Drainage 158
Periapical Surgery 158
References 158
10 Endodontic emergencies and therapeutics 162
Chapter Outline 162
Learning Objectives 162
Diagnosis and Treatment Planning 162
Incidence of Exacerbations 163
The Initial Patient Contact 163
Patient Management 163
Profound Anesthesia 163
Categories of Emergencies 163
Pretreatment Emergency 163
Management of Irreversible Pulpitis 164
Interappointment Emergencies 164
Causes of Flare-Up 164
Biology of the Necrotic (Nonvital) Exacerbation 165
Postobturation Emergencies 165
Predisposing Factors 165
Genetics 165
Gender 165
Anxiety 165
Microbiology of Flare-Ups 165
Sources of Microbes in the Canal Space 166
Intracanal Disinfectants 166
Signs and Symptoms of Infection 166
Microbial Resistance 167
Therapy 167
Canal Debridement and Disinfection 167
Drainage 167
Pharmacotherapy for Flare-Ups 168
Antimicrobial Drugs 168
Analgesics 169
Opioids, Acetaminophen, and Nonsteroidal Antiinflammatory Drugs 169
Corticosteroid Drugs 169
References 170
11 Management of traumatic dental injuries 172
Chapter Outline 172
Learning Objectives 172
Examination and Diagnosis 173
Stage of Root Development and Dental Trauma 173
History 173
Chief Complaint 173
History of Present Illness 173
Medical History 174
Clinical Examination 174
Soft Tissues 174
Facial Skeleton 174
Teeth and Supporting Tissues 174
Mobility 174
Displacement 175
Periodontal Damage 175
Pulpal Injury 175
Radiographic Examination 175
Injuries to the Hard Dental Tissues and the Pulp 177
Enamel Fractures 177
Uncomplicated Crown Fractures 177
12 Endodontic radiography 198
Chapter Outline 198
Learning Objectives 198
Importance of Radiography in Endodontics 199
Digital Radiography 199
Diagnosis 199
Identifying Pathosis 199
Determining Root and Pulpal Anatomy 199
Characterizing Normal Structures 199
Treatment 199
Determining Working Lengths 199
Moving Superimposed Structures 199
Locating Canals 199
Differentiating Canals and Periodontal Ligament Spaces 199
Evaluating Obturation 199
Follow-up Evaluation (Recall) 200
Identifying New Pathosis 200
Evaluating Healing 200
Special Applications 200
Cone-Image Shift 200
Working Radiographs 200
Radiographic Sequence 200
Diagnostic Radiographs 201
Number 201
Angulation 201
Working Radiographs 201
Working Length 201
Master Cone 201
Other Considerations 201
Obturation 202
Follow-up Evaluation (Recall) 202
Exposure Considerations 202
Cone-Image Shift 202
Principles 202
Image Shift 202
Superimposed Structures 202
Faciolingual Determination 203
SLOB Rule 203
Indications and Advantages 204
Separation and Identification of Superimposed Canals 204
Movement and Identification of Superimposed Structures 204
Determination of Working Length 204
Determination of Curvatures 204
Determination of Faciolingual Locations 204
Identification of Undiscovered Canals 204
Location of “Calcified” Canals 204
Disadvantages 206
Decreased Clarity 206
Superimposition of Structures 207
Endodontic Radiographic Anatomy 209
Interpretation 209
Limitations 209
Differential Diagnosis 209
Endodontic Pathosis 209
13 Endodontic instruments 218
Chapter Outline 218
Learning Objectives 218
Instruments for Different Procedures 218
Examination and Diagnosis Kit 218
Routine Endodontic Procedure Kit 219
Emergency Kit 219
Instruments for Bleaching 220
Intracanal Preparation Instruments 220
Physical Properties 220
Instrument Fabrication 220
Physical Characteristics 221
Instrument Design and Standardization 222
Color Coding 222
Dimensions 222
Length 222
Taper 223
Tip Design 223
Hand-Operated Instruments 223
Mechanically Operated Instruments 224
Rotary 224
Reciprocating 225
Vibratory 225
Lasers 225
Avoidance of Instrument Separation 225
Intracanal Obturation Instruments 225
Lateral Compaction 226
Warm Vertical Compaction 227
Disinfection and Sterilization 228
References 228
14 Internal anatomy 230
Chapter Outline 230
Learning Objectives 230
Methods of Determining Pulp Anatomy 230
Textbook Knowledge 230
Radiographic Evidence 232
Exploration 232
General Considerations 232
Root and Canal Anatomy 233
Identification of Canals and Roots 233
Alterations in Internal Anatomy 234
Age 234
Irritants 234
Calcifications 234
Internal Resorption 235
Components of the Pulp System 235
Pulp Horns 235
Pulp Chamber 236
Root Canals 236
Accessory Canals 236
Apical Region 237
Development 237
Apical Foramen 237
Variations in Anatomy 237
Apical Constriction 237
Variations of Root and Pulp Anatomy 238
Dens Invaginatus (Dens in Dente) 239
Dens Evaginatus 239
High Pulp Horns 239
Lingual Groove 239
Dilaceration 239
Other Variations 239
References 242
15 Isolation, endodontic access, and length determination 244
Chapter Outline 244
Learning Objectives 244
Isolation 244
Rubber Dam Application 244
Rubber Dam Retainers 245
Types 245
Universal Clamp Designs 245
Additional Designs 246
Preparation for Rubber Dam Placement 247
Isolation of Teeth with Inadequate Coronal Structure 247
Ligation 247
Deep-Reaching Clamps 247
Bonding 248
Clamping of the Gingiva 248
Replacement of Coronal Structure 248
Temporary Restorations 248
Coronal Buildups 248
Band Placement 248
Provisional Crowns 248
Corrective Surgery 248
Gingivectomy 248
Crown Lengthening 249
Orthodontic Extrusion 249
Rubber Dam Placement 249
Placement as a Unit 249
Placement of a Clamp, Followed by the Dam and Then the Frame 249
Placement of the Rubber Dam and Frame and Then the Clamp 249
Rubber Dam Leakage 249
Disinfection of the Operating Field 249
Access Openings 249
General Principles 250
Canal Morphologies 250
General Considerations 250
Access Openings and Canal Location* 253
Maxillary Central and Lateral Incisors 253
Maxillary Canines 255
Maxillary Premolars 256
Maxillary Molars 256
Mandibular Central and Lateral Incisors 258
Mandibular Canines 261
Mandibular Premolars 261
Mandibular Molars 261
Errors in Access 267
Inadequate Preparation 267
Excessive Removal of Tooth Structure 267
Length Determination 267
Radiographic Evaluation 267
Electronic Apex Locators 270
References 271
16 Cleaning and shaping 273
Chapter Outline 273
Learning Objectives 273
Principles of Cleaning 274
Principles of Shaping 274
Apical Canal Preparation 274
Termination of Cleaning and Shaping 274
Degree of Apical Enlargement 277
Elimination of Etiology 278
Apical Patency 278
Pretreatment Evaluation 278
Principles of Cleaning and Shaping Techniques 278
Smear Layer Management 279
Irrigants 280
Sodium Hypochlorite 280
EDTA 280
Chlorhexidine 281
MTAD 281
QMix 281
Ultrasonics 281
Lubricants 281
Preparation Errors 281
Preparation Techniques 283
Working Length Determination 283
Hand Instrumentation 284
Watch Winding 284
Reaming 284
Filing 284
Circumferential Filing 284
Standardized Preparation 284
Step-Back Technique 284
Step-Down Technique 284
Passive Step-Back Technique 286
Anticurvature Filing 286
Balanced Force Technique 287
Recapitulation 288
Shaping Modifications 288
Engine-Driven Instruments 288
Gates-Glidden Drills 288
Nickel-Titanium Rotary Instruments 288
Criteria for Evaluating Cleaning and Shaping 291
Intracanal Medicaments 293
Calcium Hydroxide 294
Phenols and Aldehydes 294
Corticosteroids 294
Chlorhexidine 294
Temporary Restorations* 294
Objectives of Temporization 295
Routine Access Cavities 295
Techniques of Placement 296
Extensive Coronal Breakdown 296
Provisional Post Crowns 296
Long-Term Temporary Restorations 297
References 297
17 Preparation for restoration 301
Chapter Outline 301
Learning Objectives 301
Risks to Survival of Root-Filled Teeth 301
Structural and Esthetic Considerations 302
Structural Changes in Dentin 302
Loss of Tooth Structure 302
Biomechanical Factors 302
Esthetic Factors 303
Requirements for an Adequate Restoration 303
Coronal Seal 303
Restoration Timing 303
Restoration Design 303
Principles and Concepts 303
Planning the Definitive Restoration 304
Anterior Teeth 304
Posterior Teeth 304
Direct Restorations 304
Indirect Restorations 305
Preparation of Tooth and Canal Space for Post and Core 305
Coronal Tooth Preparation 305
Post Selection 305
Post Space Preparation 310
Removal of Gutta-Percha 310
Finishing the Post Space 312
Ferrule 312
Post Type, Retention, and Core Systems 312
Anterior Teeth 312
Posterior Teeth 312
Pins 313
Restoring Access Through an Existing Restoration 313
References 314
18 Obturation 316
Chapter Outline 316
Learning Objectives 316
Objectives of “Obturation” 316
Potential Causes of Failure 317
Apical Seal 317
Leaving Debris in the RCS 317
Coronal Seal 317
Irritants from the Oral Cavity 317
Restoration 317
Lateral Seal 317
Length of Obturation 317
Overextension (Overfill) 317
Obturating Materials 317
Lack of Apical Seal Secondary to Overextension 317
Obturation Short of the Apical Construction (Underfill) 318
Lateral Canals 318
Vertical Root Fractures 319
Timing of Obturation 319
Patient’s Symptoms 319
Pulp and Periapical Status 319
Vital Pulp 319
Necrotic Pulp 319
Degree of Difficulty 319
Culture Results 319
Number of Appointments 319
Core Obturating Materials 320
Solid Materials 320
Gutta-Percha 320
Composition 320
Shapes 320
Advantages 320
Sealability 320
Methods of Obturation 320
Resin 321
Silver Points 321
Pastes (Semisolids) 321
Types 321
Zinc Oxide–Eugenol (ZnOE) 321
Plastics 321
Techniques of Placement 321
Advantages and Disadvantages of Pastes 322
Sealers 322
Desirable Properties 322
Types 323
ZnOE-Based Sealers 323
Grossman’s Formulation 323
Epoxy Resin 323
Other Plastics 323
Calcium Hydroxide 323
Glass Ionomer 324
Ceramic-Based Sealer 324
Others 324
Mixing 324
Placement 324
Obturation Techniques with Gutta-Percha 324
Selection of Technique 324
Lateral Compaction 324
Indications 324
Advantages 325
Disadvantages 325
Technique of Lateral Compaction 325
Spreader or Plugger Selection 325
Master Cone Selection 325
Fitting the MC 326
Steps in Obturation 326
Ultrasonic Compaction 329
Finishing Procedure 329
Correcting Obturation Problems 329
Solvent-Softened Custom Cones 330
Indications 330
Technique 330
Vertical Compaction 330
Indications 331
Advantages and Disadvantages 331
Technique 331
Other Warm Vertical Approaches 331
Sectional Obturation 332
Thermoplasticized Injection 333
Solvent 333
Carrier-Based Systems 333
Newer Techniques and Materials 334
Evaluation of Obturation 335
Symptoms 335
Radiographic Criteria 335
Restoration 336
The Future 336
References 336
19 Procedural accidents 338
Chapter Outline 338
Learning Objectives 338
Perforations during Access Preparation 338
Causes 338
Prevention 340
Clinical Examination 340
Operative Procedures 340
Recognition and Treatment 340
Lateral Root Perforation 342
Furcation Perforation 342
Nonsurgical Treatment 342
Surgical Treatment 342
Prognosis 342
Accidents during Cleaning and Shaping 343
Ledge Formation 343
Prevention of a Ledge 343
Preoperative Evaluation 343
Curvatures 343
Length 343
Initial Size 345
Technical Procedures 345
Management of a Ledge 345
20 Retreatment 355
Chapter Outline 355
Learning Objectives 355
Treatment Options 355
Indications for Nonsurgical Endodontic Retreatment 357
Contraindications to Nonsurgical Endodontic Retreatment 357
Indications for Surgical Retreatment 357
Risks and Benefits of Retreatment 358
Endodontic Retreatment Procedures 358
Removal of Existing Restorations 358
Removal of Canal Obstructions 358
Post and Core Removal 358
Removal of Calcifications 360
Management of Ledges 361
Instrument Fragment Removal 361
Removal of Gutta-Percha 363
Removal of Carrier-Based Gutta-Percha Obturators 367
Removal of Silver Cones (Points) 367
Removal of Soft and Hard Pastes 369
Post-Treatment Complications 371
Repair of Perforations 372
Restorative Options 372
Follow-Up Care 372
Prognosis 373
References 373
21 Endodontic surgery 376
Chapter Outline 376
Learning Objectives 376
Incision for Drainage 376
Indications 377
Contraindications 377
Procedures 377
Anesthesia 377
Incision 377
Drainage 378
Periapical Surgery 378
Indications 378
Anatomic Problems 378
Procedural Accidents 379
Irretrievable Materials in the Root Canal 379
Symptomatic Cases 379
Horizontal Apical Fracture 379
Biopsy 379
Contraindications 379
Anatomic Factors 379
Medical or Systemic Complications 379
Indiscriminate Use of Surgery 379
Unidentified Cause of Treatment Failure 382
Recent Advances in Endodontic Surgery 382
Procedures Involved in Periapical Surgery 382
Flap Design 382
Submarginal Curved Flap 384
Submarginal Triangular and Rectangular Flaps 385
Full Mucoperiosteal Flap 385
Incision and Reflection 385
Osteotomy 386
Periradicular Curettage 386
Root-End Resection 386
Root-End Cavity Preparation and Filling 387
Flap Replacement and Suturing 387
Postoperative Care and Instructions 388
Healing 389
Soft Tissue 389
Hard Tissue 390
Guided Tissue Regeneration 390
Corrective Surgery 390
Indications 390
Procedural Errors 390
Resorptive Perforations 390
Techniques 390
Root Amputation, Hemisection, and Bicuspidization 391
Techniques 391
Prognosis 392
Outcome of Endodontic Surgery 393
Conditions Indicating Referral 395
References 396
22 Evaluation of endodontic outcomes 397
Chapter Outline 397
Learning Objectives 397
Definitions of Success and Failure 397
When to Evaluate 398
Methods for Evaluation of Endodontic Outcomes 398
Patient History 398
Clinical Examination 398
Radiographic Findings 398
Histologic Examination 401
Success Rates 401
Survival Rates 402
Patient-Based Outcomes 402
Postoperative Complications 403
Prognostic Indicators 403
Causes of Nonhealed, Failed Root Canal Treatment 403
Preoperative Causes 403
Operative Causes 403
Postoperative Causes 405
Outcomes of Treatments after Failure of Initial Nonsurgical Endodontics 405
Nonsurgical Retreatment 406
Endodontic Surgery 407
Single Tooth Implant 407
Fixed Dental Prostheses 408
Intentional Replantation and Autotransplantation 408
Extraction Without Replacement 409
Reasons for Extraction of Endodontically Treated Teeth 409
References 409
23 Single implant 412
Chapter Outline 412
Learning Objectives 412
History of Single Implants 412
Diagnosis and Treatment Planning for Single Implants 414
Tooth Extraction and Site Preparation 414
Minimally Traumatic Extraction 414
Single Tooth Implant 415
Single Implants in the Esthetic Zone 416
Immediate Implant Surgery without Any Flaps 416
Surgical Technique 416
Single Implants in the Nonesthetic Zone 417
Osseous Consideration 417
Soft Tissue Consideration 419
Guided Bone Regeneration for Implant Site Development 421
Flap Design 423
Wound Closure 423
Dental Implant Maintenance Program 424
Frequency of Maintenance Appointments 426
References 426
24 Bleaching discolored teeth 428
Chapter Outline 428
Learning Objectives 428
Causes of Discoloration 428
Acquired (Natural) Discolorations 429
Pulp Necrosis 429
Intrapulpal Hemorrhage 429
Calcific Metamorphosis 429
Age 429
Developmental Defects 429
Endemic Fluorosis 429
Systemic Drugs 430
Defects in Tooth Formation 430
Blood Dyscrasias and Other Factors 431
Inflicted (Iatrogenic) Discolorations 431
Endodontically Related Discolorations 431
Obturating Materials 431
Remnants of Pulpal Tissue 431
Intracanal Medicaments 431
Coronal Restorations 431
Metallic Restorations 431
Composite Restorations 432
Bleaching Materials 432
Hydrogen Peroxide 432
Sodium Perborate 433
Carbamide Peroxide 433
Other Agents 434
Internal (Nonvital) Bleaching Techniques 435
Thermocatalytic Technique 435
Walking Bleach 435
Final Restoration 435
Future Rediscoloration 436
When to Bleach 437
Complications and Safety 437
External Root Resorption 437
Coronal Fracture 437
Chemical Burns 437
Intrinsic Discolorations 438
Tetracycline 438
Other Intrinsic Discolorations 438
Extrinsic Discolorations 438
Superficial Defects 438
Mechanism of Discoloration 438
Microabrasion Technique 439
Prognosis 439
Safety 439
When and What to Refer 439
References 440
25 Geriatric endodontics 441
Chapter Outline 441
Learning Objectives 441
Biologic Considerations 442
Pulp Response 442
Changes with Age 442
Chronologic Versus Physiologic 443
Structural 443
Calcifications 443
Dimensional 443
Nature of Response to Injury 443
From Irritation 443
Age 443
Systemic Conditions 443
Periapical Response 444
Healing 444
Medically Compromised Patients 444
Diagnosis 444
Diagnostic Procedure 444
Chief Complaint 444
Medical History 444
Dental History 444
Subjective Findings 445
Objective Tests 445
Radiographic Findings 445
Differential Diagnosis 445
Endodontic Pathosis 446
Other Pathoses 446
Treatment Planning and Case Selection 446
Procedure 446
Prognosis 446
Number of Appointments 446
Additional Considerations 447
Root Canal Treatment 447
Treatment Considerations 447
Time Required 447
Anesthesia 447
Primary Injections 447
Supplemental Injections 448
Procedures 448
Isolation 448
Access Preparation 448
Working Length 449
Cleaning and Shaping 449
Intracanal Medicaments 449
Obturation 449
Impact of Restoration 450
Retreatment 450
Endodontic Surgery 450
Medical Considerations 450
Biologic and Anatomic Factors 450
Healing After Surgery 450
Bleaching 450
Internal Stains 451
Restorative Considerations 451
Overdenture Abutments 451
Coronal Seal 451
Trauma 452
References 452
Appendix Pulpal anatomy and access preparations 455
Maxillary Right Central Incisor 456
Maxillary Right Lateral Incisor 456
Maxillary Right Canine 456
Maxillary Right First Premolar 457
Maxillary Right Second Premolar 458
Maxillary Right First Molar 459
Maxillary Right Second Molar 460
Maxillary Right Second Molar 461
Mandibular Right Central and Lateral Incisor 462
Mandibular Right Canine 462
Mandibular Right First Premolar 463
Mandibular Right Second Premolar 464
Mandibular Right First Molar 465
Mandibular Right Second Molar 466
Mandibular Right Second Molar 467
Some Uncommon Variations 467
Appendix B e1
Chapter review questions e1
Chapter 1 e1
The Biology of Dental Pulp and Periradicular Tissues e1
Chapter review questions e4
Chapter 2 e4
Protecting the Pulp and Promoting Tooth Maturation e4
Chapter review questions e7
Chapter 3 e7
Endodontic Microbiology e7
Chapter review questions e9
Chapter 4 e9
Pulp and Periapical Pathosis e9
Chapter review questions e13
Chapter 5 e13
Diagnosis, Treatment Planning, and Systemic Considerations e13
Chapter review questions e16
Chapter 6 e16
Interaction between the General Dentist and the Endodontist e16
Chapter review questions e18
Chapter 7 e18
Endodontic-Periodontic Interrelationship e18
Chapter review questions e20
Chapter 8 e20
Longitudinal Tooth Fractures e20
Chapter review questions e23
Chapter 9 e23
Local Anesthesia e23
Chapter review questions e27
Chapter 10 e27
Endodontic Emergencies and Therapeutics e27
Chapter review questions e31
Chapter 11 e31
Management of Traumatic Dental Injuries e31
Chapter review questions e35
Chapter 12 e35
Endodontic Radiology e35
Chapter review questions e38
Chapter 13 e38
Endodontic Instruments e38
Chapter review questions e41
Chapter 14 e41
Internal Anatomy e41
Chapter review questions e43
Chapter 15 e43
Isolation, Endodontic Access, and Length Determination e43
Chapter review questions e47
Chapter 16 e47
Cleaning and Shaping e47
Chapter review questions e49
Chapter 17 e49
Preparation for Restoration e49
Chapter review questions e51
Chapter 18 e51
Obturation e51
Chapter review questions e53
Chapter 19 e53
Procedural Accidents e53
Chapter review questions e55
Chapter 20 e55
Retreatment e55
Chapter review questions e57
Chapter 21 e57
Endodontic Surgery e57
Chapter review questions e59
Chapter 22 e59
Evaluation of Endodontic Outcomes e59
Chapter review questions e61
Chapter 23 e61
Single Implant e61
Chapter review questions e64
Chapter 24 e64
Bleaching Discolored Teeth e64
Chapter review questions e66
Chapter 25 e66
Geriatric Endodontics e66
Index 471
A 471
B 471
C 472
D 473
E 473
F 474
G 475
H 475
I 475
K 476
L 476
M 476
N 477
O 477
P 477
Q 479
R 479
S 480
T 481
U 482
V 482
W 482
X 482
Z 482