• 대한치과기공학회지
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• 제18권1호
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• pp.117-127
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• 1996

This study was aimed to help the construction of esthetic dental prosthesis by investigation of the factors affecting on the atterition position and attrition angle of maxillary lateral incisors. Therefore 197 complete cast of maxillary and mandibualar extracted form the student of K. college were subjected for this study, and result throught the study are as follows. 1. None attrite rate of the maxiilary right lateral incisors was about 16.2% and that of the maxillary left lateral incisors was about 32.4% of examined teeth. 2. Throught mesiodistal attrition area 1) It showed that right lateral incisors was the most frequence in attrition of mesial area of incisal edge, and left lateral incisors was the most frequence in attrition of mesial and mid area of incisal edge. 2) It showed that square type arch was more frequence in attrition of all incisal edge, and ovoid type arch was more frequence in the attrition of mid area of incisal edge, and ovoid type arch was more frequence in the attrition of mid area of incisal edge, and taper type arch was more frequence in the attrition of mesial area of incisal edge than it of average frequence of right lateral incisors, by dental arch type. 3) It showed that square type arch was more frequence in the attrition of all area and mid area of incisal edge, and ovoid type arch was more frequence in the attrition of mid area of incisal edge, and taper type arch was more frequence in the attrition of mesial and distal area of incisal edge than it of average frequence of left lateral incisal, by dental arch type. 4) Sex, vertical overlap, horizontal overlap, incisal guide angle, did not affect significantly to throughout mesiodistal attrition, statistically 3. Throughout labiolingual attrition quantity. 1) It showed that throughout labiolingual attrition quantity was more attrition in order of taper type arch < ovoid type arch < square type arch, by dental arch type. 2) It showed that throughout labiolingual attrition qauntity was more attrition when the length of horizontal overlap is shorter than it of other, by horizontal overlap. 3) Throughout labiolingual attrition quantity of right lateral incisors showed that male was more attrition than it of female. 4) Vertical overlap, incisal guide angle, sex on left lateral incisors did not affect significantly to throughout labiolingual attrition, statistically. 4. Attrition angle 1) It showed that average attrition anlge of right lateral incisors were $30{\pm}13.02$ degree, and it of left lateral incisors were $26{\pm}13.37$ degree. 2) It showed that taper type arch have a bigger attrition angle than it of average of lateral incisors, and square tape arch have a smaller attrition angle than it of average of lateral incisors, by dental arch type. 3) It showed that horizontal overlap of 2.1mm above have a bigger attrition angle than it of average, by horizontal overlap. 4) It showed that female have a bigger attrition angle it of male, by sex.

• The Journal of Advanced Prosthodontics
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• 제13권4호
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• pp.205-215
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• 2021

PURPOSE. The purpose of this study was to compare the accuracy of three intraoral scanner (IOS) systems with three different dental arch widths. MATERIALS AND METHODS. Three dental models with different intermolar widths (small, medium, and large) were attached to metal bars of different lengths (30, 40, and 50 mm). The bars were measured with a coordinate measuring machine and used as references. Three IOSs were compared: TRIOS 3 (TRI), True Definition (TD), and Dental Wings (DW). The relative length and angular deviation of both ends of the metal bars from the scan data set (n = 15) were calculated and analyzed. RESULTS. Comparing among scanners in terms of trueness, the relative length deviation of DW in the small (1.28%) and medium (1.08%) arches were significantly higher than TRI (0.46% and 0.48%) and TD (0.33% and 0.18%). The angular deviation of DW in the small (1.75°) and medium (1.83°) arches were also significantly greater than TRI (0.63° and 0.40°) and TD (0.55° and 0.89°). Comparing within scanner, the large arch of DW showed better accuracy than other arch sizes (P < .05). On the other hand, the larger arch of TD presented a greater tendency of angular deviation in terms of trueness. No significant differences were found in terms of trueness between the arch widths of TRI group. CONCLUSION. The different widths of the dental arches can affect the accuracy of some intraoral scanners in full arch scan.

• 대한치과의사협회지
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• 제38권2호통권369호
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• pp.172-181
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• 2000

• Archives of Plastic Surgery
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• 제36권1호
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• pp.56-60
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• 2009

Purpose: Palatal fracture and mandible fracture result in instability of dental arch. Because they divide the maxillary and mandibular alveolus sagittally and / or transversely and comminute the dentition, they permit rotation of dental alveolar segments and significantly increase the potential for fracture malalignment, complicating fracture treatment. Previous treatment of palatal fracture consisted of palatal splint application and rigid palatal vault stabilization. This procedure result in patient's oral discomfort and removal of palate and screw. Mandible fracture often results in malocclusion due to widening of posterior aspect of dental arch. So we introduce more simple method using intermolar traction wiring, which can protect the widening of dental arch and rotation of dental alveolar segment. Methods: Arch bar and intermolar traction wiring with wire 1 - 0, or 2 - 0 was applied. After exposure of fracture line, neutrooclusion was maintained with intermaxillary fixation. And then open reduction & internal fixation on maxillary fracture line, commonly maxillary buttress, alveolar ridge, pyriform aperture except palatal vault or mandibular fracture line. After 1 week, intermolar traction wiring was removed. We checked occlusion and postoperative radiologic finding. Results: From June of 2007 to October of 2007, 10 patient, who have maxillary fracture with palatal fracture and mandible fracture, underwent open reduction & internal fixation with intermolar traction wiring. All have satisfactory occlusion and there were no complication, like gingiva disease, mouth opening impairment and nonunion. Conclusion: The intermolar traction wiring accompany open reduction and internal fixation can be alternative method for restoration of dental arch in facial bone fracture.

• 대한소아치과학회지
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• 제7권1호
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• pp.63-74
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• 1980

The purpose of this study is to analyze the width and length changes of the dental arches during the deciduous dentition period. 600 stone models of maxillary and mandibular arches obtained from the children aged 3, 4, or 5 years were under measurement. The results were as follows ; Arch widths and lengths differed with age, sex and arch. 1. * Widths of dental archs increase with age both in males and in females. * Lengths of dental arches decrease with age in females, but remain somewhat stable in males. 2. * The dental arches of males were wider than those of females in both the ant. and the post. section. * The dental arches of males were longer than those of females: ant.arch lengths were almost same, but post. arch lengths were longer in males. 3. * Upper arches were definitely wider and longer than lower arches.

• 대한치과의사협회지
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• 제10권5호
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• pp.273-276
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• 1972

The original sample in this investigation included 36 children around the age of eight (mean age:8 year-lmonth) at the beginning. Study casts were obtained and measured every 6 months in two years of longitudinal study period in order to observe the changes of maxillary dental arch as well as the eruptional status of the maxillary lateral incisors. The results were as follows.: 1) The length of upper dental arch was increased gradually during the examination period. 2) The width between maxillary first molars was increased gradually during the examination period. 3) Intercanine distance in upper dental arch was increased gradually and the increment was conspicuous immediately after the eruption of maxillary lateral incisors.

• 대한치과교정학회지
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• 제37권5호
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• pp.364-375
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• 2007

본 연구의 목적은 한국인과 일본인의 Angle씨 I급, II급, III급 부정교합군에서 하악치열궁의 크기와 형태적 특성을 상호 비교 분석하는데 있었다. 한국인의 부정교합자 368명(I급 114명, II급 119명, III급 135명)과 일본인의 부정교합자 160명(I급 60명, II급 50명, III급 50명)을 대상으로 하였다. 치료 전 하악 치열 모형을 복사한 사진에서 13개의 인접한 접촉면에서 가장 협측에 위치한 점들을 좌표치화한 후 하악 치아의 두께 자료에 근거하여 임상 브라켓 점들을 설정하였고 4개의 선 계측과 이들을 이용하여 2개의 비율을 측정하였다. 각 부정교합군에서 측정 항목들에 관하여 t-test를 하였고 치열궁 형태를 square, ovoid, tapered 의 3가지로 분류한 후 분포 특성에 관하여 카이제곱 검정하였다. 그 결과 I급과 II급 부정교합군에서 일본 여성의 하악 치열궁 폭경이 일본남성, 한국 남성 및 한국 여성에 비해 작았으며, III급 부정교합군의 하악 치열궁 크기는 인종이나 성별에 따른 차이가 없었다. 그리고 모든 부정교합군에서 한국인과 일본인의 대부분이 square와 ovoid한 치열궁 형태를 가졌으며 II급 부정교합군에서는 일본인은 ovoid 형태가 52.%으로 가장 많고 한국인은 square 형태가 40%로 가장 많게 나타났다.

• 치위생과학회지
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• 제14권3호
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• pp.390-396
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• 2014

본 연구는 우리나라 여대생의 치열궁의 크기 및 형태와 교합유형을 조사하고 이들의 관련성을 알아보고자 치위생과 여학생 210명을 대상으로 실시하였다. 수집된 자료는 PASW 18.0 프로그램을 이용하여 통계분석하였으며, 결과는 다음과 같다. 치열궁의 크기 및 형태와 교합을 산술평균 및 빈도를 분석한 결과 상악의 견치 간 폭경은 34.38 mm, 제1대구치 폭경은 52.05 mm였으며, 견치 장경은 8.60 mm, 제1대구치장경은 28.69 mm였다. 하악은 견치 간 폭경이 26.42 mm, 제1대구치 폭경이 44.83 mm였으며, 장경은 견치가 5.54 mm, 제1대구치가 24.38 mm였다. 치열궁의 형태는 상악에서 정상이 29.0%, 협착이 60.5%, 공극이 10.5%였으며, 하악은 정상이 29.0%, 협착이 55.7%, 공극이 15.2%였다. 교합은 정상이 16.7%였으며, I급 부정교합이 55.7%로 가장 많았고, II급은 20.5%, III급은 7.1%였다. 치열궁의 형태와 교합에 따른 치열궁의 크기를 비교한 결과 하악의 제1대구치 폭경이 치열궁의 형태가 공극인 경우에 45.95로 가장 컸으며, 정상이 44.73, 협착이 44.58을 기록하였다(p=0.032). 치열궁 형태와 교합관계는 상 하악 모두 I, II, III급 부정교합에서 협착이 71.8%, 76.7%, 60.0%와 69.2%, 60.5%, 60.0%로 가장 높았다(p<0.001). 이상의 결과를 종합해보면 과거에 비해 여러 원인으로 치열궁의 장 폭경이 줄어들고 있으며, 협착으로 인한 부정교합이 증가하고 있다. 따라서 정기적인 치과검진과 구강악습관의 관리가 필요할 것으로 보인다.

• 대한치과교정학회지
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• 제33권2호
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• pp.85-90
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• 2003

하악골 정중부 골절은 종종 폭경의 붕괴를 초래한다. 견인골 신장술을 이용한 폭경의 회복은 교합재건에 만족스런 결과를 유도한다. 편측성과 양측성 하악폭경이 붕괴된 환자에서 견인골 신장술을 적용할 때 벡터와 힘의 적용에서 차이를 보인다. 본 연구는 이러한 차이를 교정학적 관점에서 살펴보고자 한다.

• 한국융합학회논문지
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• 제12권10호
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• pp.89-96
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• 2021

이 연구는 저신장의 원인에 따른 치열궁 발육의 차이점을 분석하여 교정치료의 방향을 설정하는 것을 목적으로 한다. 저신장 진단을 받은 소아들에 대해 치과 진단 검사를 시행하였다. 성장호르몬 부족이 원인인 저신장 소아의 연령과 성별을 기준으로 하여 짝진 표본추출(paired sampling)을 하여 특발성 원인 저신장 소아를 분류하였다. 대조군은 1급 부정교합이고 arch length discrepancy가 3mm 미만인 대상자들을 선정하여 동일한 방법으로 분류하였다. 결론적으로 성장호르몬이 부족하거나 특발성 원인을 가진 저신장 소아에서 정상 소아에 비해 총생의 발현율이 더 높았고 수직피개 값은 작았다. 그러므로 저신장 소아의 교정치료는 총생을 치료하기 위해 조기에 Arch length discrepancy에 대한 평가를 포함한 치료계획을 세워야 할 것이다. 본 연구는 저신장 소아의 치열교합의 특성에 따른 성공적인 교정치료를 위한 중요한 자료를 제공할 수 있을 것으로 기대한다.