• Maxillofacial Plastic and Reconstructive Surgery
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• 제42권
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• pp.37.1-37.13
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• 2020

Background: The human mandible is variable in shape, size and position and any deviation from normal can affect the facial appearance and dental occlusion. Objectives: The objectives of this study were to determine whether the Sassouni cephalometric analysis could help predict two-dimensional mandibular shape in humans using cephalometric planes and landmarks. Materials and methods: A retrospective computerised analysis of 100 lateral cephalometric radiographs taken at Kingston Hospital Orthodontic Department was carried out. Results: Results showed that the Euclidean straight-line mean difference between the estimated position of gonion and traced position of gonion was 7.89 mm and the Euclidean straight-line mean difference between the estimated position of pogonion and the traced position of pogonion was 11.15 mm. The length of the anterior cranial base as measured by sella-nasion was positively correlated with the length of the mandibular body gonion-menton, r = 0.381 and regression analysis showed the length of the anterior cranial base sella-nasion could be predictive of the length of the mandibular body gonion-menton by the equation 22.65 + 0.5426x, where x = length of the anterior cranial base (SN). There was a significant association with convex shaped palates and oblique shaped mandibles, p = 0.0004. Conclusions: The method described in this study can be used to help estimate the position of cephalometric points gonion and pogonion and thereby sagittal mandibular length. This method is more accurate in skeletal class I cases and therefore has potential applications in craniofacial anthropology and the 'missing mandible' problem in forensic and archaeological reconstruction.

• 대한치과교정학회지
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• 제29권1호
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• pp.23-35
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• 1999

한국인 7세-17세 아동의 두개저, 상악, 하악의 사춘기 성장 양상을 파악해 보고자 남자 251개, 여자 286개의 측모두부계측방사선 사진을 이용, 10개의 계측점과 16개의 계측항목을 설정하고 계측항목에 대한 계측치와 각 연령별 년간 누년차를 산출한 다음 이들간의 통계적 유의성을 검증하였으며 각 계측항목을 두개저, 상악, 하악의 세군으로 분류하고 또 남녀별로 분류하여 비교함으로써 다음과 같은 결론을 얻었다. 1. 한국인 성장기 아동에 있어서의 성장은 남자 아동에 비해 여자 아동이 빠른 시기에 일어났다. 2. 두개저, 상악골, 하악골 모두 사춘기 성장을 나타내었으나 두개저의 성장은 안면골 성장에 비해 상대적으로 작았다. 3. 두개저 성장에 있어서 전두개저 길이의 증가에 비해 중두개저 및 후두개저의 길이 증가가 현저했으며 사춘기 성장증가(circumpuberal growth spurt) 양상도 보다 명확했다.4. 상악골의 전하방 이동은 상악골 자체의 길이 성장과 상악골 주위 봉합부의 성장에 따른 변위가 종합된 결과로 두개저에 대한 상악골의 상대적 위치를 나타내는 Ar-ANS와 Ar-Pr이 상악골 자체의 길이 성장을 나타내는 ANS-PNS보다 많은 성장량을 보였다. 5. 하악골은 수평 성장량에 비해 수직 성장이 약간 크게 나타났으나 유의할 수준은 아니다. 6. 상악 치조골과 하악 치조골은 유치 탈락후 영구치 맹출시기에 최대 성장률을 보인후 감소하는 경향을 보이지만 하악 치조골의 수직성장에서는 사춘기 성장증가가 관찰되었다.

• Journal of Yeungnam Medical Science
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• 제38권1호
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• pp.47-52
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• 2021

Background: Short stature is defined as a height below the 3rd percentile or more than two standard deviations below the mean for a given age, sex, and population. There have been inconsistent results regarding craniofacial morphology in short-statured children. This study aimed to analyze the differences between short-statured children with growth hormone deficiency, idiopathic short-statured children, and normal children. Methods: Thirty-one short-statured children with growth hormone deficiency, 32 idiopathic short-statured children, and 32 healthy children were enrolled in this study. The measurements of their craniofacial structures from lateral cephalograms were evaluated. Results: There were statistically significant differences among the three groups seven variables (anterior cranial base length, posterior cranial base length, total cranial base length, upper posterior facial height, posterior total facial height, mandibular ramus length, and overall mandibular length) in the linear measurement and five variables (saddle angle, gonial angle, mandibular plane angle, position of mandible, and maxilla versus mandible) in the angular measurement. Conclusion: Compared to the control group, many linear and angular measurements of the craniofacial structures were significantly different in the two short-statured groups (p <0.05). Treatment plans by orthodontists should include these craniofacial structure characteristics.

• 대한치과교정학회지
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• 제19권1호
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• pp.187-200
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• 1989

The purpose of this study was to find out the craniofacial skeletal characteristics and to establish standards in facial patterns of Korean adolescences with normal occlusion. The subjects consisted of 54 males and 71 females ranging in age from 12 to 16 years. To classify facial patrons, number the clinical deviations from the normal five key measurements: the facial axis, facial angle, mandibular plane angle, lower face height, mandibular arc, are added and averaged with the proper sign to divide subjects into three groups ; brachyfacial, mesofacial dolichofacial groups. For the comparison of each group, a total of 43 morphologic variables were employed and the data were analyzed by statistical methods. The findings of this study can be summerized as follows; 1. The mesofacial group was $54.4\%$, the brachyfacial group was $29.6\%$ and the dolichofacial group was $16.0\%$ in this subjects. 2. There were no significant differences in size and shape of cranial base among each groups. 3. The brachyfacial group manifested the forward positioned maxilla and mandible to anterior cranial base, smaller cant of the mandibular plane, square shaped mandible, and prominent symphysis as compared with dolichofacial group. 4. There were no significant differences in the cant of the maxilla to the anterior cranial base among each groups. 5. Ramal height and madibular body length of brachyfacial group were larger than those of dolichofacial group. 6. Brachyfacial group indicated the smallest degree in divergency of maxilla and mandible while dolichofacial group showed the largest degree.

• 대한치과교정학회지
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• 제9권1호
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• pp.133-140
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• 1979

The author compared patients showing two extremes of incisor vertical relationship to find out differences in craniofacial morphology which might influence face height and incisor overbite. The subjects consisted of 53 open-bite cases and the same number of deep-bite cases. The results were as follows: 1. On the average, the lower face height was significantly greater in open-bite cases than in deep-bite cases. 2. In open-bite cases, gonin-menton length was significantly greater than in deep-bite cases. In deep-bite cases, anterior cranial base length and posterior cranial base length were significantly greater in open-bite cases. 3. The jaw angle was significantly greater in open-bite cases. 4. The gonion-menton-nasion angle was significantly greater in deep-bite cases. 5. From geometric standpoint, the increase of jaw and joint angle would increase lower face height, but these two showed negative correlation. 6. The sizes of the jaw and joint angle might be factors of open-bite or deep-bite, but these were not the only variables that determined lower face height. 7. In open-bite cases, there was a closer correlationship between lower face height and the other linear measurments than in deep-bite cases. In deep-bite cases, there was a closer correlationship between lower face height and the other angular measurements than in open-bite cases. 8. Considering both linear and angular measurements of facial polygon, all contributed significantly to the lower face height. The nonsignificant variables were jaw and joint angle in open-bite cases, and anterior cranial base length, jaw angle, and joint angle in deep-bite cases.

• Archives of Plastic Surgery
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• 제39권4호
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• pp.352-353
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• 2012

• 대한치과교정학회지
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• 제6권1호
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• pp.39-46
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• 1976

This study was undertaken to establish the cephalometric standards, using lateral cephalometric roentgenograms of 48 male and 53 female Korean adults with normal occlusion and acceptable profile. By Cohen's method, measurement of depth was taken parallel to the FH plane and expressed as a percentage of the cranial base depth (BA-N). And vertical height was measured along the line perpendicular to the FH plane and expressed as a percentage of the anterior face height (N-M). The following conclusions were obtained: 1) Means and standard deviations of craniofacial proportions of Korean adults were tabulated. 2) Cranial babe depth of male was greater than that of female. 3) The proportionate depth of the middle face was greater in female than in male. 4) The proportionate total anterior face height was greater in male than in female. And it was greater in Korean than in the white.

• 대한두개안면성형외과학회지
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• 제10권2호
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• pp.97-102
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• 2009

Purpose: To close anterior cranial base, various types of pedicle flaps have been developed previously. However, the results of those pedicle flaps were not constant. To solve such problem, the author designed bipedicle temporalis-pericranial (BTP) flap based on various types of existing flaps and this study intends to introduce this flap and present clinical application case. Methods: The pedicle of the proposed temporalis-pericranial flap is temporalis muscle. The point of this BTP flap is that because of both sides of the unilateral temporalis-pericranial flap are connected by midline pericranial tissue connected with dense vascular network communicate one another locally, that BTP flap can be safely elevated. The case is a 14 months old male patient of frontoethmoidal encephalomeningocele. Surgery was done in a way that after elevating BTP flap and removing encephalomeningocele, BTP flap was moved intracranially, and to prevent cerebrospinal fluid leakage, anterior cranial base was closed. Results: During 1 year and 6 month outpatient tracking observation, no particular finding like CSF leakage, meningitis or hydrocephalus was observed. Conclusion: The benchmarked BTP flap, effective in the treatment of frontoethmoidal encephalomeningocele, is one of the methods to close intracranium and extracranium.

• Journal of Korean Neurosurgical Society
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• 제40권2호
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• pp.110-113
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• 2006

Surgery and radiotherapy are mainly used for plasma cell neoplasm which constitutes about $1{\sim}2%$ of human malignancy. The authors carried out Fractionated Stereotactic Radiotherapy[FSRT] on the residual tumor after the subtotal removal of Intracranial plasmacytoma. A huge mass lesion was observed on MRI [magnetic resonance image] in the left anterior and middle cranial fossa of a 63-year-old man with left exophthalmus which lasted for a month, and was suspected as a meningioma with strong contrast enhancement. Extramedullary plasmacytoma was diagnosed on histopathological examination. After the surgery, FSRT was also carried out on the residual tumor which invaded the skull base. One-year follow up after FSRT showed contrast enhancement only in the left sphenoid bone on MRI, which indicated significant decrease in the size of the tumor without any abnormal neurologic deficits. We treated intracranial plasmacytoma which invaded left anterior and middle cranial fossa and surrounded cavernous sinus without cranial nerve deficit through subtotal tumor removal and FSRT.

• 대한치과교정학회지
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• 제40권4호
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• pp.227-238
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• 2010

저신장이란 같은 연령 및 성별 소아들의 표준 신장 평균치에서 -2.0 SD 이하인 경우를 말한다. 본 연구의 목적은 저신장 소아의 두개안면골격의 특성을 분석하고, 성장호르몬 치료가 신장을 성장시킴과 동시에 두개안면골격에 어떤 영향을 주는지 알아보고자 함이다. 영남대학교 의과대학 부속병원 소아청소년과에서 저신장으로 진단받은 소아를 대상으로 성장 호르몬 치료 전 그리고 치료 후 1년, 2년 후 총 3회 측모 두부 방사선 규격 사진의 촬영을 시행하였다. 대조군은 경북대학교 치의학전문대학원 교정과에 소장된 한국인 평균 신장의 2 표준오차 내의 아동들을 대상으로 측모 두부 방사선 규격사진을 2년마다 10년간 촬영한 자료를 이용하여 저신장 소아의 연령과 성별을 기준으로 짝진 표집(paired sampling)을 하였다. 성장 호르몬 치료 전 저신장 소아는 작고 후퇴된 하악골과 편평한 두개저를 가지는 것으로 나타났다. 성장 호르몬 치료 후 anterior, posterior cranial base length, upper posterior facial height, lower anterior facial height, posterior total facial height, mandibular ramus length, mandibular corpus length와 overall mandibular length 성장량이 정상군에서의 2년 성장량과 비교했을 때 유의하게 큰 것으로 나타났으며 각도 계측에서는 saddle angle, mandibular plane angle과 ANB변화량이 정상군에서의 2년 성장량과 비교했을 때 큰 변화를 보이며 정상군의 평균치를 따라잡는 경향을 보였다. 성장 호르몬 치료는 불균형적인 성장의 징후 없이 정상화를 향한 성장(따라잡기 성장)을 나타내었으며 이는 특히 하악과두의 성장과 후안면고경의 성장을 촉진시켜 저신장 소아의 convex한 profile을 완화하는 것으로 판단된다.