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Skeletal and dental components of Class II correction with the bionator and removable headgear splint appliances.
Am J Orthod Dentofacial Orthop. 2008 Dec; 134(6):732-41.AJ

Abstract

INTRODUCTION

The purpose of this study was to differentiate the dentoalveolar and skeletal effects to better understand orthodontic treatment. We evaluated the treatment changes associated with the bionator and the removable headgear splint (RHS).

METHODS

The sample comprised 51 consecutively treated Class II patients from 1 office who had all been successfully treated with either a bionator (n=17) or an RHS appliance (n=17). Class II patients waiting to start treatment later served as controls (n=17). A modified version of the Johnston pitchfork analysis was used to quantify the dentoalveolar and skeletal contributions to the anteroposterior correction at the levels of the molars and the incisors.

RESULTS

Both appliances significantly improved anteroposterior molar relationships (2.15 mm for the bionator, 2.27 mm for the RHS), primarily by dentoalveolar modifications (1.49 and 2.36 mm for the bionator and the RHS, respectively), with greater maxillary molar distalization in the RHS group. Overjet relationships also improved significantly compared with the controls (3.11 and 2.12 mm for the bionator and the RHS, respectively), due primarily to retroclination of the maxillary incisors (2.2 and 2.38 mm for the bionator and the RHS, respectively). The differences between overall corrections and dentoalveolar modifications for both molar and overjet relationships were explained by skeletal responses, with the bionator group showing significantly greater anterior mandibular displacement than the RHS group.

CONCLUSIONS

The bionator and the RHS effectively corrected the molar relationships and overjets of Class II patients primarily by dentoalveolar changes.

Authors+Show Affiliations

FAEPO/UNESP and FAMOSP/GESTOS, Araraquara, São Paulo, Brazil. dr_renatopmartins@hotmail.comNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

19061799

Citation

Martins, Renato Parsekian, et al. "Skeletal and Dental Components of Class II Correction With the Bionator and Removable Headgear Splint Appliances." American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, vol. 134, no. 6, 2008, pp. 732-41.
Martins RP, da Rosa Martins JC, Martins LP, et al. Skeletal and dental components of Class II correction with the bionator and removable headgear splint appliances. Am J Orthod Dentofacial Orthop. 2008;134(6):732-41.
Martins, R. P., da Rosa Martins, J. C., Martins, L. P., & Buschang, P. H. (2008). Skeletal and dental components of Class II correction with the bionator and removable headgear splint appliances. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 134(6), 732-41. https://doi.org/10.1016/j.ajodo.2007.07.022
Martins RP, et al. Skeletal and Dental Components of Class II Correction With the Bionator and Removable Headgear Splint Appliances. Am J Orthod Dentofacial Orthop. 2008;134(6):732-41. PubMed PMID: 19061799.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Skeletal and dental components of Class II correction with the bionator and removable headgear splint appliances. AU - Martins,Renato Parsekian, AU - da Rosa Martins,Joel Claudio, AU - Martins,Lidia Parsekian, AU - Buschang,Peter H, PY - 2007/01/01/received PY - 2007/07/01/revised PY - 2007/07/01/accepted PY - 2008/12/9/pubmed PY - 2009/1/16/medline PY - 2008/12/9/entrez SP - 732 EP - 41 JF - American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics JO - Am J Orthod Dentofacial Orthop VL - 134 IS - 6 N2 - INTRODUCTION: The purpose of this study was to differentiate the dentoalveolar and skeletal effects to better understand orthodontic treatment. We evaluated the treatment changes associated with the bionator and the removable headgear splint (RHS). METHODS: The sample comprised 51 consecutively treated Class II patients from 1 office who had all been successfully treated with either a bionator (n=17) or an RHS appliance (n=17). Class II patients waiting to start treatment later served as controls (n=17). A modified version of the Johnston pitchfork analysis was used to quantify the dentoalveolar and skeletal contributions to the anteroposterior correction at the levels of the molars and the incisors. RESULTS: Both appliances significantly improved anteroposterior molar relationships (2.15 mm for the bionator, 2.27 mm for the RHS), primarily by dentoalveolar modifications (1.49 and 2.36 mm for the bionator and the RHS, respectively), with greater maxillary molar distalization in the RHS group. Overjet relationships also improved significantly compared with the controls (3.11 and 2.12 mm for the bionator and the RHS, respectively), due primarily to retroclination of the maxillary incisors (2.2 and 2.38 mm for the bionator and the RHS, respectively). The differences between overall corrections and dentoalveolar modifications for both molar and overjet relationships were explained by skeletal responses, with the bionator group showing significantly greater anterior mandibular displacement than the RHS group. CONCLUSIONS: The bionator and the RHS effectively corrected the molar relationships and overjets of Class II patients primarily by dentoalveolar changes. SN - 1097-6752 UR - https://www.unboundmedicine.com/medline/citation/19061799/Skeletal_and_dental_components_of_Class_II_correction_with_the_bionator_and_removable_headgear_splint_appliances_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889-5406(08)00472-1 DB - PRIME DP - Unbound Medicine ER -