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Dentoskeletal and soft-tissue changes with cervical headgear and mandibular protraction appliance therapy in the treatment of Class II malocclusions.
Am J Orthod Dentofacial Orthop. 2007 Apr; 131(4):447.e21-30.AJ

Abstract

INTRODUCTION

In this study, we cephalometrically compared changes in the dentoskeletal and soft tissues after orthodontic treatment of Class II Division 1 malocclusions between the cervical headgear (CHG) and the mandibular protraction appliance (MPA) followed by fixed appliances.

METHODS

The sample consisted of 50 patients divided into 2 groups of 25 patients each (13 male, 12 female). Group 1 patients were treated with CHG and fixed appliance, and group 2 patients were treated with the MPA and fixed appliances. The patients were matched according to sex, age, treatment time, and initial cephalometric variables. The groups were compared regarding pretreatment stage and treatment changes, with t tests, at P <.05.

RESULTS

The CHG group showed statistically greater restriction of the anterior displacement of the maxilla, improvement of the skeletal Class II relationship, decreased facial convexity, extrusion and distalization of the maxillary first molar, and extrusion of the mandibular incisors. The MPA group had statistically greater increases in maxillary length, mandibular protrusion, maxillary incisor retrusion, mesial displacement of the mandibular first molars, and protrusion of the lower lip.

CONCLUSIONS

The changes in Class II malocclusion correction between the CHG and the MPA were that the CHG corrected the Class II malocclusion primarily through greater action on the maxillary skeletal and dentoalveolar structures as compared with the MPA, which corrected the malocclusion through greater action on the mandibular dentoalveolar structures.

Authors+Show Affiliations

Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

17418708

Citation

Siqueira, Danilo Furquim, et al. "Dentoskeletal and Soft-tissue Changes With Cervical Headgear and Mandibular Protraction Appliance Therapy in the Treatment of Class II Malocclusions." 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. 131, no. 4, 2007, pp. 447.e21-30.
Siqueira DF, de Almeira RR, Janson G, et al. Dentoskeletal and soft-tissue changes with cervical headgear and mandibular protraction appliance therapy in the treatment of Class II malocclusions. Am J Orthod Dentofacial Orthop. 2007;131(4):447.e21-30.
Siqueira, D. F., de Almeira, R. R., Janson, G., Brandão, A. G., & Coelho Filho, C. M. (2007). Dentoskeletal and soft-tissue changes with cervical headgear and mandibular protraction appliance therapy in the treatment of Class II malocclusions. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 131(4), e21-30.
Siqueira DF, et al. Dentoskeletal and Soft-tissue Changes With Cervical Headgear and Mandibular Protraction Appliance Therapy in the Treatment of Class II Malocclusions. Am J Orthod Dentofacial Orthop. 2007;131(4):447.e21-30. PubMed PMID: 17418708.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Dentoskeletal and soft-tissue changes with cervical headgear and mandibular protraction appliance therapy in the treatment of Class II malocclusions. AU - Siqueira,Danilo Furquim, AU - de Almeira,Renato Rodrigues, AU - Janson,Guilherme, AU - Brandão,Analu Giampietro, AU - Coelho Filho,Carlos Martins, PY - 2005/08/01/received PY - 2006/04/01/revised PY - 2006/04/01/accepted PY - 2007/4/10/pubmed PY - 2007/4/25/medline PY - 2007/4/10/entrez SP - 447.e21 EP - 30 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 - 131 IS - 4 N2 - INTRODUCTION: In this study, we cephalometrically compared changes in the dentoskeletal and soft tissues after orthodontic treatment of Class II Division 1 malocclusions between the cervical headgear (CHG) and the mandibular protraction appliance (MPA) followed by fixed appliances. METHODS: The sample consisted of 50 patients divided into 2 groups of 25 patients each (13 male, 12 female). Group 1 patients were treated with CHG and fixed appliance, and group 2 patients were treated with the MPA and fixed appliances. The patients were matched according to sex, age, treatment time, and initial cephalometric variables. The groups were compared regarding pretreatment stage and treatment changes, with t tests, at P <.05. RESULTS: The CHG group showed statistically greater restriction of the anterior displacement of the maxilla, improvement of the skeletal Class II relationship, decreased facial convexity, extrusion and distalization of the maxillary first molar, and extrusion of the mandibular incisors. The MPA group had statistically greater increases in maxillary length, mandibular protrusion, maxillary incisor retrusion, mesial displacement of the mandibular first molars, and protrusion of the lower lip. CONCLUSIONS: The changes in Class II malocclusion correction between the CHG and the MPA were that the CHG corrected the Class II malocclusion primarily through greater action on the maxillary skeletal and dentoalveolar structures as compared with the MPA, which corrected the malocclusion through greater action on the mandibular dentoalveolar structures. SN - 1097-6752 UR - https://www.unboundmedicine.com/medline/citation/17418708/Dentoskeletal_and_soft_tissue_changes_with_cervical_headgear_and_mandibular_protraction_appliance_therapy_in_the_treatment_of_Class_II_malocclusions_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0889-5406(06)01602-7 DB - PRIME DP - Unbound Medicine ER -