Osteometric Analysis of Palatal Bone Thickness for Orthodontic Miniscrew Placement

Abstract

Orthodontic miniscrews have been widely used in various areas, because they are stable, easy to use, and inexpensive. Therefore, the aims of this study are to measure the palatal bone thickness, to analysis the correlation between the size of the alveolar arch and palatal bone thickness, and to discuss the skeletal structure of the hard palate for miniscrew placement. Twenty-four dry skulls in Koreans were used. The three different horizontal reference lines were established at first premolar and second premolar, between second premolar and first molar, and first molar. And then, a total of 12 points were set up in relation to each horizontal reference line by drawing a vertical reference line perpendicular to central incisor, between central incisor and lateral incisor, lateral incisor, between lateral incisor and canine. At each point, the palatal bone thickness, the width and length of the alveolar arch, and the width and length of the incisive foramen were measured directly with the bone caliper and the digital caliper. The correlation between the width and the length of alveolar arch and the palatal bone thickness was analyzed. The mean of palatal bone thickness based on the horizontal reference line was 11.4±3.2 mm in between first premolar and second premolar, 7.4±2.4 mm in between second premolar and first molar, and 5.2±1.5 mm in first molar, decreased posteriorly with statistically significant difference. The position between first premolar and second premolar showed a constant thickness, and thickened laterally from the median palatal suture due to the alveolar process, but no statistically significant difference. At the position between second premolar and first molar and the position in first molar, it were also constant, then became significantly thicker toward point between lateral incisor and canine due to the alveolar process and the palatal spine. The width of the alveolar arch was correlated with the length of the alveolar arch and the palatal bone thickness of between first premolar Original Article *이 논문은 2016학년도 조선대학교 학술연구비의 지원을 받아 연구되었음. 저자 (들)는 ‘의학논문 출판윤리 가이드라인’을 준수합니다. 저자 (들)는 이 연구와 관련하여 이해관계가 없음을 밝힙니다. Received: August 29, 2019; Revised: September 18, 2019; Accepted: September 20, 2019 Correspondence to: 김흥중 (조선대학교 치과대학 구강해부학교실) E-mail: hjbkim@chosun.ac.kr 94 유선경, 조용화, 임진웅, 김흥중