• 한국제4기학회지
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• 제21권1호
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• pp.37-45
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• 2007

머리뼈 밑면의 높이는 영양상태와 건강조건에 크게 영향을 받는다. 귀밑점-으뜸점(Porion-basion)의 길이로 알려진 머리뼈 밑면의 높이는 캘리퍼(coordinate caliper)나 머리깊이(subtraction)를 계산하는 방법 등으로 쉽게 측정된다. 이 연구에서는 조선후기(17-18세기)와 6.25전쟁을 수행한 한국인의 영양상태와 건강상태를 알고자 하였다. 이를 위해 6.25전사자와 조선후기(17-18세기) 인골을 자료로 머리뼈 밑면높이의 변화정도를 살펴보고 변화에 영향을 끼친 요인이 무엇인지를 밝히고자 한다. 17-18세기 조선시대 회곽묘에서 출토된 인골모음과 6.25전사자 유해모음을 자료로 하였으며 비교는 미국에서 시기를 달리한 테리 인골모음과 법의학 인골모음을 사용하였다. 한국 인골모음의 경우 백인들과 비슷하거나 약간 낮으나 흑인보다는 건강상태가 좋은 것으로 관찰되는데 이는 민간계층가정에서 어린아이 성장에 필요한 영양을 효과적으로 공급하는 민간 재래적 방법 때문인 것으로 가늠된다. 그러나 조선 후기시대후기 인골의 영양상태는 일제하에서 성장한 6.25전사자와 별로 차이가 없다.

• 대한치과교정학회지
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• 제5권1호
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• pp.57-63
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• 1975

For the purposes of augmentation of the aid for case analysis and diagnosis of malocclusion, a roentgenocephalometric study was made from 84 Korean adolescences. The Subjects consist of 42 males and 42 females aged from 17 to 20 years with normal occlusion and acceptable facial appearance. The author measured 18 angles and 14 linear distances as suggested by Jarabak. The following results were obtained. 1) Each linear measurement of the males' skull was greaten than that of the females. 2) The posterior to anterior facial height was $69.2\%$ in the males and $67.1\%$ in the females. 3) In the relationship of upper lip to esthetic line, the lip of females was more behind than that of males. 4) Saddle angle was $124.7^{\circ}$, articular angle was $148.7^{\circ}$, genial angle was $119.4^{\circ}$ and upper and lower genial angles were $45.1^{\circ}\;(N-Go-a^{\circ})$ and $74.2^{\circ}\;(N-Go-Me^{\circ})$. 5) The ratio of mandibular body to anterior cranial base was about 1:1. 1. 6) The angulations of $SNA^{\circ},\;SNB^{\circ}\;and\;SNP^{\circ}$ were as follows; $SNA^{\circ},\;80.3^{\circ},\;SNB^{\circ},\;79.8^{\circ},\;SNP^{\circ},\;81.1^{\circ}$. 7) The angle of the sella-nasion plane to the mandibular plane $(SNG^{\circ}Me^{\circ})$ was $32.0^{\circ}$ and that of the occlusal plane to the mandibular plane was $18.2^{\circ}$. 8) The angle of the maxillary central incisor to the sellanasion plane $(1-SN^{\circ})$ was $105.6^{\circ}$. That of the mandibular central incisor to the mandibular plane $(1-GoMe^{\circ})$ was $94.0^{\circ}$, and the interincisal angle $(1\;to\;1^{\circ})$ was $127.6^{\circ}$. 9) The linear distance from incisal edge of upper central incisor to facial plane was 8.0mm and that of lower central incisor was 4.6mm. 10) In the relationship of the lower lip to the esthetic line, the lower lip was 0.2mm front of the esthetic line.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제45권3호
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• pp.129-134
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• 2019

Objectives: The objective of this study was to highlight the role of lateral arthroplasty along with interposition of the buccal fat pad (BFP) in the management of Sawhney type III temporomandibular joint (TMJ) ankylosis. Materials and Methods: Ten patients with TMJ ankylosis (7 unilateral and 3 bilateral, total of 13 joints) were treated with lateral arthroplasty and BFP interposition. The bony bridge of the ankylotic mass on the lateral aspect was resected, leaving a distance of 1.5 to 2.0 cm from the base of the skull to the neck of the condyle. The condyle was left intact. Coronoidectomy was performed on the ipsilateral side via the same approach in all cases. The inter-incisal opening was measured at that time, and if it was less than 35 mm, contralateral coronoidectomy was performed by using the intra-oral approach. After satisfactory inter-incisal mouth opening (${\geq}35mm$) was achieved, the TMJ surgical site was revisited, and BFP was retrieved and used to cover the lateral aspect of the medially placed condyle. Results: With lateral arthroplasty, the medially displaced condyle can be left in-situ to maintain the mandibular ramal height and function and to act as a growth center in children. Interposition of the BFP prevents reformation of the lateral bony bridge that was removed. Conclusion: Lateral arthroplasty along with interpositioning of the BFP is a novel technique for managing Sawhney type III ankylosis that achieves management goals while avoiding complex and advanced reconstructive surgical procedures.

• Imaging Science in Dentistry
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• 제50권4호
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• pp.323-330
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• 2020

Purpose: The mastoid region is ideal for studying sexual dimorphism due to its anatomical position at the base of the skull. This study aimed to determine sex in the Iranian population based on measurements of the mastoid process using different data mining algorithms. Materials and Methods: This retrospective study was conducted on 190 3-dimensional cone-beam computed tomographic (CBCT) images of 105 women and 85 men between the ages of 18 and 70 years. On each CBCT scan, the following 9 landmarks were measured: the distance between the porion and the mastoidale; the mastoid length, height, and width; the distance between the mastoidale and the mastoid incision; the intermastoid distance (IMD); the distance between the lowest point of the mastoid triangle and the most prominent convex surface of the mastoid (MF); the distance between the most prominent convex mastoid point (IMSLD); and the intersecting angle drawn from the most prominent right and left mastoid point (MMCA). Several predictive models were constructed and their accuracy was compared using cross-validation. Results: The results of the t-test revealed a statistically significant difference between the sexes in all variables except MF and MMCA. The random forest model, with an accuracy of 97.0%, had the best performance in predicting sex. The IMSLD and IMD made the largest contributions to predicting sex, while the MMCA variable had the least significant role. Conclusion: These results show the possibility of developing an accurate tool using data mining algorithms for sex determination in the forensic framework.