Open-Bite Malocclusion Treatment and Stability

Open-Bite Malocclusion: Treatment and Stability presents the etiology, treatment, and its stability of anterior open bite malocclusion in the early, mixed, and permanent dentitions. Special emphasis is devoted to orthodontic treatment and its stability in the permanent dentition because this is the time when treatment of open bite presents greater relapse. Appropriate for clinicians, orthodontic residents, and dental students, Open-Bite Malocclusion covers the most simple treatment approaches to the most complex, from orthodontic devices to tooth extraction to surgery.

Unique to this book is the discussion of post-treatment stability. Drs. Janson and Valarelli highlight the post-treatment changes and presents strategies to increase treatment stability. This allows the clinician to be able to predict the stability probabilities when treating anterior open bite malocclusions in the permanent dentition either with or without extraction, orthodontic-surgical therapy, or with occlusal adjustment.

Dr. Guilherme Janson is Professor of Orthodontics at Bauru Dental School, University of São Paulo, Brazil. His three primary lines of research are asymmetric malocclusions, efficiency of Class II malocclusion treatment protocols, and stability of open bite treatment. He has authored and co-authored more than sixty peer-reviewed journal articles on these subjects.

Dr. Fabricio Valarelli is Associate Professor of Orthodontics at Ingá Dental School, Maringá, Paraná, and has a private practice in Bauru, São Paulo, Brazil. He is especially interested in clinical research, focusing on Class II and anterior open bite malocclusion treatment and their stabilities.

List of Contributors

Foreword

Angelos Metaxas

Foreword

Greg Huang

Acknowledgments

1 Etiology of open-bite malocclusion

Karina Freitas and Rodrigo Cançado

Environmental factors

Deleterious habits

Pacifier and thumb-sucking 

Anterior tongue posture and tongue thrust 

Mouth breathing 

Upper respiratory obstacles 

Lower respiratory obstacles

Traumatisms

Genetic factors

Growth pattern

Pathologies

Craniofacial anomalies

References 

2 Open-bite treatment in the deciduous and mixed dentitions

Guilherme Janson and Fabrício Valarelli

Overbite measurement

Treatment in the deciduous dentition

Treatment in the mixed dentition

Open bite associated with different types of malocclusions

Open-bite and Class I malocclusions

Open bite associated to Class II and III malocclusions 

Open-bite and Class II malocclusions

Open-bite and Class III malocclusions 

Treatment stability in the deciduous and mixed dentitions

References

3 Open-bite treatment in the permanent dentition

Guilherme Janson and Fabrício Valarelli

Differential diagnosis

Open-bite nonextraction treatment

Usual clinical procedures

Additional procedures during treatment to aid in open-bite closure

Mesial angulation of the attachments

Association of tongue crib or spurs during treatment

Reversing and accentuating the curve of spee

Clinical cases

Class I malocclusions

Class II malocclusions

Class III malocclusions

Stability of nonextraction open-bite treatment

Open-bite treatment with extractions

Clinical cases

Class I malocclusions

Class II malocclusions

Stability of extraction open-bite treatment

Stability of extraction versus nonextraction open-bite treatment

Treatment of open bite with occlusal adjustment

Clinical procedure

Patient selection

Cephalometric changes expected with the procedure

Functional occlusion changes

Dentinal sensitivity

Clinical considerations

Stability of open-bite treatment with occlusal adjustment

Open-bite treatment and root resorption

Clinical implications

References

4 Open-bite correction with posterior teeth intrusion

Sérgio Barros and Daniela Garib

Introduction

Types of skeletal anchorage for open-bite correction

Skeletal anchorage positioning for molar intrusion

Molar intrusion mechanics with skeletal anchorage

Dentoskeletal effects of molar intrusion for open-bite closure

Open-bite correction with skeletal anchorage, conventional mechanics, and orthognathic surgery: a critical analysis

Clinical cases

Stability of anterior open-bite treatment by posterior teeth intrusion

Clinical cases

References

5 Orthodontic-surgical treatment of anterior open bite

Eduardo Sant’ana, Marcos Janson, and Roberto Bombonatti

Combined orthodontic-surgical treatment of skeletal anterior open bite

Orthodontic-surgical preparation to correct skeletal anterior open bite

Diagnosis of skeletal anterior open bite

Stages of combined orthodontic-surgical treatment

Treatment planning

Orthodontic treatment

Presurgical impression and revaluation of dental positioning

Presurgical records and definite treatment planning

Plaster model surgery and construction of an intermediary splint

Orthognathic surgery

Bracket rebonding, finishing procedures, and appliance removal

Retention and final records

Stability of orthodontic-surgical anterior open-bite correction

References

Index

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