INTRODUCTION: The aims of this study were to analyze 3-dimensional skeletal changes in subjects with Class II malocclusion treated with the Herbst appliance and to compare these changes with treated Class II controls using 3-dimensional superimposition techniques. METHODS: Seven consecutive Herbst patients and 7 Class II controls treated with Class II elastics who met the inclusion criteria had cone-beam computed tomographs taken before treatment, and either after Herbst removal or at posttreatment for the control subjects. Three-dimensional models were generated from the cone-beam computed tomography images, registered on the anterior cranial bases, and analyzed using color maps and point-to-point measurements. RESULTS: The Herbst patients demonstrated anterior translation of the glenoid fossae and condyles (right anterior fossa, 1.69 ± 0.62 mm; left anterior fossa, 1.43 ± 0.71 mm; right anterior condyle, 1.20 ± 0.41 mm; left anterior condyle, 1.29 ± 0.57 mm), whereas posterior displacement predominated in the controls (right anterior fossa, -1.51 ± 0.68 mm; left anterior fossa, -1.31 ± 0.61 mm; right anterior condyle, -1.20 ± 0.41 mm; left anterior condyle, -1.29 ± 0.57 mm; P <0.001). There was more anterior projection of B-point in the Herbst patients (2.62 ± 1.08 mm vs 1.49 ± 0.79 mm; P <0.05). Anterior displacement of A-point was more predominant in the controls when compared with the Herbst patients (1.20 ± 0.53 mm vs -1.22 ± 0.43 mm; P <0.001). CONCLUSIONS: Class II patients treated with the Herbst appliance demonstrated anterior displacement of the condyles and glenoid fossae along with maxillary restraint when compared with the treated Class II controls; this might result in more anterior mandibular projection.
INTRODUCTION: The aims of this study were to analyze 3-dimensional skeletal changes in subjects with Class II malocclusion treated with the Herbst appliance and to compare these changes with treated Class II controls using 3-dimensional superimposition techniques. METHODS: Seven consecutive Herbst patients and 7 Class II controls treated with Class II elastics who met the inclusion criteria had cone-beam computed tomographs taken before treatment, and either after Herbst removal or at posttreatment for the control subjects. Three-dimensional models were generated from the cone-beam computed tomography images, registered on the anterior cranial bases, and analyzed using color maps and point-to-point measurements. RESULTS: The Herbst patients demonstrated anterior translation of the glenoid fossae and condyles (right anterior fossa, 1.69 ± 0.62 mm; left anterior fossa, 1.43 ± 0.71 mm; right anterior condyle, 1.20 ± 0.41 mm; left anterior condyle, 1.29 ± 0.57 mm), whereas posterior displacement predominated in the controls (right anterior fossa, -1.51 ± 0.68 mm; left anterior fossa, -1.31 ± 0.61 mm; right anterior condyle, -1.20 ± 0.41 mm; left anterior condyle, -1.29 ± 0.57 mm; P <0.001). There was more anterior projection of B-point in the Herbst patients (2.62 ± 1.08 mm vs 1.49 ± 0.79 mm; P <0.05). Anterior displacement of A-point was more predominant in the controls when compared with the Herbst patients (1.20 ± 0.53 mm vs -1.22 ± 0.43 mm; P <0.001). CONCLUSIONS: Class II patients treated with the Herbst appliance demonstrated anterior displacement of the condyles and glenoid fossae along with maxillary restraint when compared with the treated Class II controls; this might result in more anterior mandibular projection.
Authors: Danielle R Periago; William C Scarfe; Mazyar Moshiri; James P Scheetz; Anibal M Silveira; Allan G Farman Journal: Angle Orthod Date: 2008-05 Impact factor: 2.079
Authors: Robert Y Wei; Arjun Atresh; Antonio Ruellas; Lucia H S Cevidanes; Tung Nguyen; Brent E Larson; Jonathan E Mangum; David J Manton; Paul M Schneider Journal: Am J Orthod Dentofacial Orthop Date: 2020-08-20 Impact factor: 2.650
Authors: Hanem Younes Elfeky; Mona Salah Fayed; Maged Sultan Alhammadi; Sanaa Abou Zeid Soliman; Dalia Mohamed El Boghdadi Journal: J Orofac Orthop Date: 2018-04-16 Impact factor: 1.938
Authors: Antonio Carlos de Oliveira Ruellas; Luis T Huanca Ghislanzoni; Marcelo Regis Gomes; Carlotta Danesi; Roberta Lione; Tung Nguyen; James A McNamara; Paola Cozza; Lorenzo Franchi; Lucia Helena Soares Cevidanes Journal: Am J Orthod Dentofacial Orthop Date: 2016-04 Impact factor: 2.650
Authors: L Ivorra-Carbonell; J-M Montiel-Company; J-M Almerich-Silla; V Paredes-Gallardo; C Bellot-Arcís Journal: Med Oral Patol Oral Cir Bucal Date: 2016-09-01
Authors: Francesca Gazzani; Antonio Carlos de Oliveira Ruellas; Kurt Faltin; Lorenzo Franchi; Paola Cozza; Renato Bigliazzi; Lucia Helena Soares Cevidanes; Roberta Lione Journal: Biomed Res Int Date: 2018-04-24 Impact factor: 3.411