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Clinical Orthodontics: Current Concepts, Goals and Mechanics - E-Book

Clinical Orthodontics: Current Concepts, Goals and Mechanics - E-Book

Ashok Karad

(2014)

Additional Information

Book Details

Abstract

Clinical Orthodontics: Current Concepts, Goals and Mechanics, now in its second edition, focuses on the clinical aspects of art and science of orthodontics. The book primarily centres around contemporary treatment principles and techniques, and redefines orthodontic treatment goals in accordance with the current understanding of the science. Newer treatment methods are highlighted with unbiased treatment approach to produce high-quality results.

  • Revised and updated chapters covering important areas of the subject
  • Each chapter is supported by well-documented clinical cases and high-quality illustrations for better understanding
  • Exclusive chapters include: Digital Imaging in Orthodontics, Interdisciplinary Orthodontics, Excellence in Finishing, Functional Occlusion Goals in Orthodontics, Lingual Orthodontics, Role of Skeletal Anchorage in Modern Orthodontics, Optimizing Orthodontic Treatment, and Management of an Orthodontic Practice
  • Chapter contributions by a dynamic group of leading world-class clinicians, researchers, teachers and authors, delivering cutting-edge information
  • Craniofacial Growth: A Clinical Perspective
  • Role of Skeletal Anchorage in Modern Orthodontics
  • Optimizing Orthodontic Treatment

Table of Contents

Section Title Page Action Price
Front cover Cover
Front matter i
Copyright i
Dedication v
Foreword vii
Contributors ix
Preface xi
Acknowledgements xiii
Table of contents xv
Detailed contents xvi
Prologue Current status of orthodontic profession xxi
Diagnosis and imaging xxi
Research and material science xxii
Clinical orthodontics and practice management xxii
Appliance innovations xxiii
1 Craniofacial growth: A clinical perspective 1
Cranial base 1
Maxilla 3
Mandible 4
Dental arches 6
Horizontal and vertical growth inter-relationship 6
Overbite changes 8
Facial soft tissue growth 8
Nasal growth 8
Growth changes in the lip length and thickness 9
The chin growth 9
Post-treatment craniofacial growth 9
Ageing: Skeletal and soft tissue changes 10
Conclusion 10
References 10
2 Diagnosis and treatment planning 12
Diagnostic information 13
Patient interview (questionnaire) 13
Clinical examination 14
Natural head position 14
Extraoral examination 14
Cephalic and facial type 14
Frontal facial examination 15
Profile facial examination 16
Malar sufficiency 16
Examination of nose 16
Examination of lips 16
Examination of chin 18
Intraoral examination 20
Evaluation of oral health 20
Functional examination 21
Assessment of the postural rest position of the mandible 21
Assessment in the sagittal plane 22
1. class II malocclusions 22
2. class III malocclusions 22
Assessment in the vertical plane 22
Assessment in the transverse plane 22
Examination of the tmj 22
Examination of orofacial function 23
Diagnostic records and their analysis 24
Study models 24
Archform analysis 24
Bolton’s tooth ratio analysis 25
Mixed dentition analysis 25
Radiographic records 26
Radiologic examination 26
Cephalometric analysis 26
Cranial base assessment 27
Maxillary skeletal assessment 28
Maxillary dentoalveolar assessment 28
Mandibular dentoalveolar assessment 29
Mandibular skeletal assessment 31
Maxillomandibular relation 33
Soft tissue analysis 34
Diagnostic process 35
Defining treatment goals 35
Static occlusal goals 37
Stomatognathic function 37
A) dynamic occlusal relationships 37
B) orofacial function 38
Optimal dentofacial aesthetics 38
Periodontal health 39
Post-treatment long-term stability 39
Orthodontic treatment planning 39
Factors influencing treatment planning 39
Growth 39
Location of discrepancy 40
Existing discrepancy 40
Functional assessment 40
Aetiological assessment 41
Patient compliance 41
Dentofacial aesthetics 41
Patient motivation and expectations 42
Periodontal condition 42
Retention and stability considerations 42
Growth prediction 42
Longitudinal method of growth prediction 43
Metric approach to growth prediction 43
Structural approach to growth prediction 43
Treatment options 43
Early treatment 43
Extraction and non-extraction 44
Surgical and nonsurgical treatment 44
Orthopaedic and orthodontic treatment 45
Treatment sequencing 45
Evaluation of treatment progress 45
Conclusion 46
References 47
3 Digital imaging in orthodontics 49
Digital clinical photography 49
Tips for capturing the perfect digital clinical photograph 51
Alternate image capture and management: Wireless tethered photography (fig. 3.9) 52
Digital impressioning systems for intraoral data capture (fig. 3.11) 53
Digital impressions, cad/cam, 3d printing 53
Communication: Case presentation, patient education, and marketing 53
Computerized cephalometry: Tracing, superimposition, and treatment planning 54
Tracing and analysis 54
Superimposition and treatment planning 55
Growth/treatment prediction and visual treatment objective (vto) 55
Growth prediction 56
Computerized prediction and planning 56
Three-dimensional radiography: Why cone beam computed tomography (cbct)? 57
History of cbct 58
Cone beam computed tomography 58
Spatial reality 58
Point of view 59
Endless views 61
Patient expectations 61
Caveats of cone beam 63
Cbct basics and terminology 63
Points of view 63
Maximum intensity projection (mip) 63
Attenuation and greyscale 63
Pixels and voxels 63
Hounsfield units (fig. 3.43) 64
Microsievert 64
Dosimetry: 2d VS 3d 66
Conclusion 66
Acknowledgements 66
References 66
4 Sagittal discrepancies 68
Development of a sagittal problem 68
Diagnosis of sagittal discrepancies 69
Class II malocclusion 69
Clinical examination and functional assessment 69
Functional assessment 69
Morphologic characteristics 69
Horizontal types 70
Functional class II with a distally forced bite 70
Class III malocclusion 70
Assessment of facial profile 72
Functional assessment 72
Dental assessment 72
Cephalometric assessment 73
Treatment planning 75
Treatment of sagittal discrepancies 75
Treatment of class II malocclusion 75
Treatment of dentoalveolar class II malocclusion 76
Biologic variables 76
Dentoalveolar problems: Early treatment 76
Maxillary molar distalization 76
Case selection criteria. 78
Appliance selection. 79
Anchorage. 79
Expansion. 79
Force levels. 79
Stabilization of molars. 79
Postdistalization mechanics. 79
Non-extraction headgear treatment 84
Extraction treatment approach 88
Management of extraction space. 88
Management of vertical dentoalveolar problems 89
Orthodontic camouflage: A treatment alternative for skeletal discrepancy 90
Management of functional class II malocclusion 90
Functional criteria as the determinant of treatment method 90
Treatment of skeletal class II malocclusion 90
Maxillary prognathism 90
Mandibular retrusion 92
Treatment of class III malocclusion 97
Dentoalveolar class III malocclusion 97
Dentoalveolar movements to camouflage skeletal class III discrepancy 99
Functional class III malocclusion 102
Skeletal class III malocclusion 102
Maxillary skeletal retrusion 102
The orthopaedic facial mask. 102
Mandibular skeletal protrusion 105
Conclusion 107
References 107
5 Vertical discrepancies 109
Development of a vertical problem 109
Growth 109
Environmental factors 111
Diagnosis of vertical discrepancies 112
Facial evaluation 112
Functional assessment 112
Morphologic characteristics 114
Treatment planning 116
Treatment of vertical discrepancies 117
Management of long-face patients 117
Mixed dentition treatment 118
Extraction treatment approach 119
Mandibular bite blocks and vertical-pull chin cup 125
Management of vertical problems in average-angle patients 126
Dentoalveolar open bite 127
Dentoalveolar deep overbite 131
Intrusion of incisors 133
Orthodontic camouflage: A treatment alternative for skeletal discrepancy 136
Management of short-face patients 137
Conclusion 143
References 143
6 Transverse discrepancies 145
Development of a transverse problem 145
Diagnosis of transverse problems 146
Types of transverse discrepancies 146
Dental asymmetries 146
Midline deviations 146
Posterior tooth position 148
Archform distortions 148
Occlusal plane considerations 148
Skeletal transverse discrepancies 149
Muscular asymmetries 149
Functional transverse problems 150
Assessment of transverse problems 150
Clinical examination 150
Radiographic examination 151
Posteroanterior cephalogram 151
Transverse discrepancies: Their relationship with sagittal and vertical dimensions 154
Treatment planning considerations 154
Treatment of transverse discrepancies 155
Early resolution of transverse problems 155
Mandibular deviation 157
Maxillary constriction 160
Orthodontic correction of dental transverse discrepancies 162
Transverse problems involving asymmetric buccal occlusion 162
Asymmetric buccal occlusion without midline deviation 164
Posterior crossbites 168
Transverse occlusal plane considerations 169
Skeletal transverse problems in adults 170
Camouflage 172
Conclusion 176
References 176
7 Surgical orthodontics 177
Diagnosis and treatment planning 181
Patient’s chief concern 181
General patient evaluation 181
Psychological evaluation 181
Facial evaluation 182
Frontal analysis 182
Facial form 182
Vertical dimension 183
Lower third of the face 183
Tooth-to-lip relationship 184
Transverse dimension 185
Profile analysis 185
Nose and paranasal areas 185
Lip projection 186
Labiomental fold 186
Nasolabial angle 186
Chin projection 187
Chin–throat angle 187
Cephalometrics for orthognathic surgery 188
Cephalometric analysis 188
Soft tissue analysis 188
Hard tissue analysis 188
Soft tissue profile alterations 189
Dental cast 190
Prediction for treatment planning 192
Orthodontic preparation 192
Presurgical orthodontics 192
Horizontal plane 192
Vertical plane 194
Transverse considerations 197
Orthodontics for surgical patients 197
Surgical procedures 197
Surgical treatment for skeletal class II malocclusion 197
Surgery for class III skeletal dysplasia 197
Surgery for vertical problems 197
Maxillary vertical deficiency 197
Maxillary vertical excess 197
Postsurgical orthodontics 198
Stability following orthognathic surgery 198
Conclusion 198
References 198
8 Role of skeletal anchorage in modern orthodontics 199
Various skeletal anchorage used in modern orthodontics 199
Orthodontic mini-implant 199
Bone plate 200
Palatal implant and plate 200
LIM (lingual irritation-free minimally-invasive) plate system 203
Placement of LIM plate system 204
Components of LIM plate system 204
Placement site of LIM plate system 206
Placement procedure of LIM plate system 207
Removal of LIM plate system 210
Cases using LIM plate system 212
Cases using mini-implant placed in the retromolar area of the mandible 244
Conclusion 252
References 252
9 Lingual orthodontics 253
Key diagnostic and treatment planning considerations 254
Patient selection 254
Bracket positioning, laboratory setup and bonding procedure 254
Bracket positioning 254
The laboratory and indirect bonding procedure of hiro system 258
Impression making 258
Fabricating the setup 258
Prepare the ideal archwire 258
Mesiodistal position 258
Bracket height 258
Crimp surgical hooks 259
Stick dowel pins 259
Fabricate the attachments 259
Prepare the models 261
Soap the setup model 261
Complete the bracket prescription 261
Fabricate resin cores 262
Finalizing the resin cores 263
The bonding procedure 263
Bracket rebonding 264
The advantages of hiro system as compared with other indirect bonding techniques 265
Archwires used in lingual therapy 266
Archwire shape 266
Typical lingual archwire configuration 266
Anchorage control 266
Treatment sequence 266
Levelling, aligning, rotational control and bite opening 266
Archwire ligation 267
Retraction or consolidation mechanics 267
Torque control 267
Finishing and detailing 267
Various lingual appliance systems 267
Kurz appliance 267
Creekmore system 271
Lingual straight wire appliance 271
Experimentally made 45° torque twin brackets 278
Double over-tie 279
Speech difficulties 279
Tongue irritation 279
Bracket interference 279
Brackets being broken off 280
Cost 280
Hiro brackets 280
STb bracket system 288
Customized brackets 288
Biomechanics and case selection 293
Conclusion 297
References 298
10 Management of cleft lip and cleft palate patients 299
Role of the orthodontist 299
Infancy 299
Impression technique, appliance fabrication and design 300
Appliance insertion and taping 300
Appliance adjustments and nasal stent fabrication 301
Nonsurgical columella lengthening in bilateral cleft lip and palate 301
Benefits of nam 302
Orthodontic/orthopaedic treatment in the primary dentition 302
Mixed dentition 303
Intermediate secondary alveolar bone graft 303
Bilateral cleft lip and palate: Premaxillary position 304
Anteroposterior discrepancy 304
Transverse discrepancy 304
Permanent dentition 305
Patients with no skeletal deformity 306
Patients with mild skeletal discrepancy 306
Patients with moderate to severe skeletal discrepancy 306
Conclusion 309
References 309
11 Treatment of periodontally compromised patients 310
Minimal periodontal involvement 310
Moderate periodontal involvement 314
Severe periodontal involvement 318
Finishing and retention 323
Conclusion 323
References 323
12 Interdisciplinary orthodontics 325
Interdisciplinary philosophy 326
Diagnostic and treatment planning process 326
Defining treatment goals 326
Case presentation 327
Treatment sequencing 327
Periodontally compromised patient 327
Tooth position and periodontal condition 328
Preliminary periodontal therapy 328
Endodontic treatment 329
Implants for anchorage and restoration 329
Orthodontic treatment 331
Pathologic tooth migration 332
Restorative treatment 332
Ortho-restorative interrelationship 332
Space regaining: Molar uprighting and distalization 332
Tooth positioning for proper restoration 332
Gaining distal abutment tooth 335
Management of congenitally missing maxillary lateral incisors 335
Restoration of missing lateral incisor with implant 335
Optimal implant space 337
Implant site development 337
Aesthetics 337
Excessive gingival display (‘gummy’ smile) 339
Gingival architecture and teeth remodelling 340
Unstable occlusion 341
Conclusion 344
References 344
13 Functional occlusion goals in orthodontics 346
Goals of orthodontics for occlusion 347
Mandibular position as a functional goal of orthodontic treatment 347
Joints first 350
Anatomy of the temporomandibular joints 354
Disc 354
Structure of the disc 354
Normal position of the disc 354
Roles of the disc 355
Key factors necessary for stability of the disc 355
14 Excellence in finishing 391
Occlusal parameters 392
Static occlusal parameters 392
Alignment 392
Archform coordination 393
Components of archform 393
Archwire coordination 394
Establishing marginal ridge relationships 395
Contact points 395
Occlusal relationship 396
Molar position 396
Bicuspid position 397
Canine position 398
Incisor position 398
Occlusal contact relationship 399
Vertical dimension 399
Dynamic occlusal parameters 399
Anterior guidance 401
Lateral excursions 401
Periodontal factors 402
Aesthetic parameters 404
Crown width discrepancy 405
Role of ‘illusion’ 407
Aesthetic recontouring 407
Postdebonding restoration of original enamel surface 409
Enamel decalcification 409
Teeth whitening: The finishing touch to beautiful, straight teeth 409
Replacement of missing laterals with implants 410
Gingival architecture 410
Anterior aesthetic gingival depigmentation 410
Smile 411
Anatomy of the smile 413
What is smile line? 413
Conclusion 414
References 414
15 Retention and stability: A perspective 416
Requirements for retention and stability 417
Definition of retention 417
Definition of stability 418
Normal changes in the untreated dentition 418
Measurement of lower incisor irregularity 419
Overbite and overjet changes 421
Other dental arch changes 421
Natural space for lower incisor alignment 421
Anterior component of force resulting in mesial migration of teeth 421
Role of third molars in the development of mandibular incisor crowding 421
Mandibular growth and its effect on late mandibular incisor crowding 422
Changes in the treated dentition 422
Role of extraction or nonextraction treatment on the stability of the treated occlusion 422
Longitudinal changes in the soft tissue profile and the influence on the dentition 424
Retainers and post-treatment occlusion 426
Retention protocol 428
Factors to consider in the maintenance of long-term stability 430
The phase of maintenance: Phase 3 435
Clinical treatment recommendations 436
The future 436
Final comments 436
Conclusion 439
References 439
16 optimizing orthodontic treatment 443
Specific features of orthodontic treatment 443
Treatment duration 444
Patient compliance 444
Pain and discomfort 444
Treatment-induced enamel colour alterations 444
Enamel decalcification 445
Root resorption 445
Adverse effects on periodontal tissues 445
Temporomandibular disorders (TMDs) 445
Practice environment 446
Quality systems 446
Standard of care 448
Variables affecting treatment outcome 448
Organized approach to diagnostic decision making 448
A well-designed, properly implemented treatment plan 449
Selection of appliance system 449
Precision bracket positioning 449
Principles of bracket positioning 450
Common errors in bracket placement 452
Efficient tooth movement 453
Orthodontic tooth movement 453
Orthodontic appliance system 454
Self-ligating brackets 456
Quality of ligation 457
Full archwire engagement 457
Friction 457
Speed of ligation 460
Oral hygiene 460
Identify areas of concern for stability 460
High-quality finishing 460
Key cephalometric indicators of treatment success 464
Conclusion 472
References 472
17 Management of an orthodontic practice 474
Scheduling 474
Goal setting 474
Appointing rules 476
Building the standards or grids 476
Notify patients of change in next appointment 476
Appointing policy 482
Sample appointing policy for new patients 482
Appointments 482
Appointment confirmation 484
Late arrivals 484
Orthobucks 484
Comfort visits 484
Arrival time 484
Pager 485
Start slots 485
Electronic sign-in 485
Electronic treatment card 485
Staying on time 485
Changes at the front desk 486
Morning meeting report 486
Red-dot, green-dot calendar 486
Vertical calendar 486
Key performance indicators 490
Practice building 491
Patient compliance 491
Finishing patients on time 492
12-month review, staff to ask 494
Overhead analysis/cost containment 494
Conclusion 506
Epilogue 507
The unchangeable 507
Sustaining and disruptive technologies 507
Three-dimensional imaging 508
Mass-produced customized orthodontic appliances 508
Technology, processes and behaviour 509
References 509
Index 511
A 511
B 511
C 511
D 512
E 512
F 512
G 512
H 513
I 513
J 513
K 513
L 513
M 513
N 514
O 514
P 514
Q 515
R 515
S 515
T 515
U 515
V 516
W 516
X 516
Y 516
Z 516