Takatoshi Nakawaki1, Tetsutaro Yamaguchi2, Daisuke Tomita1, Yu Hikita1, Mohamed Adel3, Koshu Katayama3, Koutaro Maki4. 1. a Student, Department of Orthodontics, School of Dentistry, Showa University, Tokyo, Japan. 2. b Associate Professor, Department of Orthodontics, School of Dentistry, Showa University, Tokyo, Japan. 3. c Research Assistant, Department of Orthodontics, School of Dentistry, Showa University, Tokyo, Japan. 4. d Professor, Department of Orthodontics, School of Dentistry, Showa University, Tokyo, Japan.
Abstract
OBJECTIVE: To investigate the relationship between anteroposterior and vertical differences in maxillofacial morphology and mandibular volume. MATERIALS AND METHODS: Subjects comprised 213 Japanese adults (84 males and 129 females) who were divided into three groups based on mandibular basal arch (ANB) and Wits, measured in a cephalometric analysis: Class I (-1° ≤ ANB < 4°,-1 mm ≤ Wits < 0 mm), Class II (ANB ≥ 4°, Wits ≥ 0), and Class III (ANB <-1°, Wits <-1 mm). Subjects were also divided into three groups based on the mandibular plane angle (Mp), as follows: hypodivergent (Mp < 23°), normodivergent (Mp = 23-30°), and hyperdivergent (Mp > 30°) groups. Mandibular volume was measured from cone-beam computed tomographic images that were analyzed using Analyze™ image processing software and compared among the three groups in each classification. RESULTS: No significant differences were noted in mandibular volume among Classes I, II, and III. An inverse relationship was found between mandibular volume and Mp, and a significant difference was noted in mandibular volume between the hypodivergent and hyperdivergent groups. CONCLUSIONS: In addition to two-dimensional analysis, such as lateral cephalometry, three-dimensional information such as volume, provided by cone-beam computed tomography, contributes to a more detailed assessment of maxillofacial morphology.
OBJECTIVE: To investigate the relationship between anteroposterior and vertical differences in maxillofacial morphology and mandibular volume. MATERIALS AND METHODS: Subjects comprised 213 Japanese adults (84 males and 129 females) who were divided into three groups based on mandibular basal arch (ANB) and Wits, measured in a cephalometric analysis: Class I (-1° ≤ ANB < 4°,-1 mm ≤ Wits < 0 mm), Class II (ANB ≥ 4°, Wits ≥ 0), and Class III (ANB <-1°, Wits <-1 mm). Subjects were also divided into three groups based on the mandibular plane angle (Mp), as follows: hypodivergent (Mp < 23°), normodivergent (Mp = 23-30°), and hyperdivergent (Mp > 30°) groups. Mandibular volume was measured from cone-beam computed tomographic images that were analyzed using Analyze™ image processing software and compared among the three groups in each classification. RESULTS: No significant differences were noted in mandibular volume among Classes I, II, and III. An inverse relationship was found between mandibular volume and Mp, and a significant difference was noted in mandibular volume between the hypodivergent and hyperdivergent groups. CONCLUSIONS: In addition to two-dimensional analysis, such as lateral cephalometry, three-dimensional information such as volume, provided by cone-beam computed tomography, contributes to a more detailed assessment of maxillofacial morphology.
Authors: Saba Ahmed Al-Hadad; Enas Senan ALyafrusee; Abbas Ahmed Abdulqader; Waseem Saleh Al-Gumaei; Rana A A M Al-Mohana; Liling Ren Journal: BMC Oral Health Date: 2022-04-28 Impact factor: 3.747
Authors: Luz Victoria Mendoza; Carlos Bellot-Arcís; José María Montiel-Company; Verónica García-Sanz; José Manuel Almerich-Silla; Vanessa Paredes-Gallardo Journal: Sci Rep Date: 2018-08-17 Impact factor: 4.379