Longitudinal study on skeletal changes during and after bionator therapy using metallic implants

Authors

  • André da Costa Monini São Paulo State University
  • Luiz Gonzaga Gandini Júnior São Paulo State University
  • Lídia Parsekian Martins
  • Dirceu Barnabé Raveli São Paulo State University

DOI:

https://doi.org/10.20396/bjos.v9i1.8641966

Keywords:

Angle’s class II malocclusion, Ativator appliances, Maxillofacial development

Abstract

Aim: To demonstrate the magnitude and direction of skeletal changes in the maxilla and mandible during and after the use of bionator, as well as their rotations. Methods: Partial superimposition on the maxilla and mandible on the metallic implants and total superimposition on the cranial base were performed at three periods, T1 before bionator therapy, T2 after bionator therapy, and T3 5.68 years after T2. Results: There was total clockwise maxillary rotation and counterclockwise mandibular rotation, in the North American technique, throughout the study period, as well as extensive remodeling on the condylar region, especially in vertical direction and on the gonial region in horizontal direction. Conclusions: The total maxillary rotation seemed to be significantly affected by therapy than the mandible. There was a clear change in the direction of condylar remodeling compared to the period of bionator therapy and posterior bionator therapy. Considering the entire study period, it was observed that intra-matrix rotation of the maxilla and mandible masked their total rotation, causing minimum changes in the matrix rotation.

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Author Biographies

André da Costa Monini, São Paulo State University

DDS, MS. Graduate student, Department of Orthodontics and Pediatric Dentistry, Araraquara Dental School, São Paulo State University

Luiz Gonzaga Gandini Júnior, São Paulo State University

DDS, MS, Ph D., Professor, Department of Orthodontics and Pediatric Dentistry, Araraquara Dental School, São Paulo State University, Brazil; Adjunct Clinical Professor, Baylor College of Dentistry, Dallas, TX, USA and Saint Louis University, Saint Louis, MO.

Lídia Parsekian Martins

DDS, MS, Ph D. Professor, Department of Orthodontics and Pediatric Dentistry, Araraquara Dental School, São Paulo State University

Dirceu Barnabé Raveli, São Paulo State University

DDS, MS, Ph D. Professor, Department of Orthodontics and Pediatric Dentistry, Araraquara Dental School, São Paulo State University

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Published

2015-11-29

How to Cite

1.
Monini A da C, Gandini Júnior LG, Martins LP, Raveli DB. Longitudinal study on skeletal changes during and after bionator therapy using metallic implants. Braz. J. Oral Sci. [Internet]. 2015 Nov. 29 [cited 2022 Oct. 4];9(1):33-8. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641966

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