Misa Ikoma1, Kazuhito Arai2. 1. Department of Orthodontics, School of Life Dentistry at Tokyo, Nippon Dental University, Tokyo, Japan. 2. Department of Orthodontics, School of Life Dentistry at Tokyo, Nippon Dental University, Tokyo, Japan. Electronic address: drarai@tky.ndu.ac.jp.
Abstract
INTRODUCTION: Our objective was to investigate craniofacial morphology in women with Class I occlusion and maxillary anterior crowding (MxAC) with bilateral palatal displacement of the lateral incisors and facial displacement of the canines. METHODS: Thirty-three women with normal occlusion (mean age, 20.7 ± 2.3 years) were selected as the control group, and 33 women with severe MxAC (mean age, 23.3 ± 3.8 years) with bilateral palatal and facial displacement of the lateral incisors and canines, respectively, were selected as the MxAC group. Mesiodistal tooth crown diameter, arch length discrepancy, facial-palatal displacement of lateral incisors and canines, and dental arch dimensions were measured. Fourteen skeletal and 10 dental cephalometric measurements were made. Medians, interquartile ranges, means, and standard deviations were calculated for each parameter, and the nonparametric Mann-Whitney U test (P <0.05) was used to compare the 2 groups. RESULTS: Compared with the control group, the MxAC group showed a significantly wider angle (P <0.05) and shorter length (P <0.01) in the cranial base, a smaller sagittal maxillary base (P <0.01), and a hyperdivergent skeletal pattern (P <0.01 and P <0.05). CONCLUSIONS: Women with Class I occlusion and severe MxAC exhibited a significantly wider angle and shorter length in the cranial base, a smaller sagittal maxillary base, and a hyperdivergent skeletal pattern. These skeletal and dental characteristics and cranial base dysmorphology may be helpful as potential indicators for orthodontic treatment with extractions.
INTRODUCTION: Our objective was to investigate craniofacial morphology in women with Class I occlusion and maxillary anterior crowding (MxAC) with bilateral palatal displacement of the lateral incisors and facial displacement of the canines. METHODS: Thirty-three women with normal occlusion (mean age, 20.7 ± 2.3 years) were selected as the control group, and 33 women with severe MxAC (mean age, 23.3 ± 3.8 years) with bilateral palatal and facial displacement of the lateral incisors and canines, respectively, were selected as the MxAC group. Mesiodistal tooth crown diameter, arch length discrepancy, facial-palatal displacement of lateral incisors and canines, and dental arch dimensions were measured. Fourteen skeletal and 10 dental cephalometric measurements were made. Medians, interquartile ranges, means, and standard deviations were calculated for each parameter, and the nonparametric Mann-Whitney U test (P <0.05) was used to compare the 2 groups. RESULTS: Compared with the control group, the MxAC group showed a significantly wider angle (P <0.05) and shorter length (P <0.01) in the cranial base, a smaller sagittal maxillary base (P <0.01), and a hyperdivergent skeletal pattern (P <0.01 and P <0.05). CONCLUSIONS:Women with Class I occlusion and severe MxAC exhibited a significantly wider angle and shorter length in the cranial base, a smaller sagittal maxillary base, and a hyperdivergent skeletal pattern. These skeletal and dental characteristics and cranial base dysmorphology may be helpful as potential indicators for orthodontic treatment with extractions.
Authors: Yara Al Senani; Al Jouharah Al Shammery; Abeer Al Nafea; Nisreen Al Absi; Omar Al Kadhi; Deema Al-Shammery Journal: Int J Environ Res Public Health Date: 2021-01-10 Impact factor: 3.390