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 present 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. Key Features Provides clinical recommendations for treating primary, mixed, and permanent dentitions Features findings from the latest research on open–bite treatment and long–term stability Clinical photographs and radiographs

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

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.