3차원 스캐너를 이용한 상악 제1유구 치관의 크기와 형태에 관한 연구 = A morphometric study of the maxillary primary first molars using three-dimensional scanner

다국어 초록 (Multilingual Abstract)

The purpose of this study was to elucidate the size and morphologic characteristics of maxillary primary first molars in Korean children using three-dimensional laser scanner and compare three-dimensional image with preformed stainless steel crown.
Scanned three-dimensional images of dental cast taken from 132 children(male 62, female 70) by three-dimensional laser scanner(Breuckmann opto-Top HE100, INUS, Korea) were used. Mesiodistal diameter, buccolingual diameter, occlusogingival height and crown shape of each image were calculated by Rapidform 2004 program(INUS, Korea). The values were statistically compared by independent samples t-test with 95% of significant level.
The results were as follows:
1. No significant difference in crown size was found between left and right maxillay primary first molar(p>0.05).
2. Significant difference in mesiodistal diameter, buccolingual diameter, buccal occlusogingival height was found between male and female(p<0.05), and crown size of male was bigger than that of female.
3. Average image of maxillay primary first molar was shaped three-dimensionally and measured. In comparison with 3M stainless steel crown, this image was similar with No.4 or No.5 SS crown in male, No.4 in female. In comparison with ILSUNG SS crown, this image was similar with No.5 in male, No.4 in female.
4. Mesiolingual line angle area, distolingual line angle area and buccogingival ridge were more obvious in average image than 3M stainless steel crown. ILSUNG SS crown was more square and had longer mesiodistal diameter than average 3D image.

국문 초록 (Abstract)

본 연구의 목적은 상악 제 1 유구치 치관의 크기와 형태적 특성을 3차원 스캐너를 이용하여 계측하고 기성 금속관과의 크기와 형태학적인 차이를 비교하는 것이다.
3차원 레이저 스캐너(Breuckmann opto Top-HE100, INUS, Korea)로 스캔한 132명의 어린이들의 상악 제1 유구치 경석고 모형을 Rapidform 2004 프로그램(INUS, Korea)을 이용하여 각 치아의 근원심경과 협설경, 교합면-치경부 간 거리, 근원심경에 대한 협설경의 비율을 계측하고 평균치를 얻었으며, 남녀 상악 제 1 유구치의 평균적인 크기와 형태를 얻고 기성 금속관과 비교하여 다음과 같은 결과를 얻었다.
1. 상악 제1 유구치 치관의 좌우측 크기에 있어서 유의한 차이를 보이지 않았다(p>0.05).
2. 상악 제 1 유구치 치관의 남녀 간 크기에 있어서 남자의 치관 크기가 유의하게 더 큰 값을 보였고(p<0.05), 치관의 형태에 유의한 차이는 보이지 않았다(p>0.05).
3. 3차원 이미지로 상악 제 1 유구치를 재구성하여 나타낸 평균적인 남녀 상악 제 1 유구치의 크기는 3M의 기성 금속관과 비교 시, 남자는 기성 금속관의 4, 5번 사이, 여자는 기성 금속관의 4번과 유사하였고, 일성의 기성 금속관과 비교 시 기성 금속관의 근원심경이 커서 협설경을 기준으로 남자는 5번, 여자는 4번과 유사한 크기를 보였다.
4. 3M의 기성 금속관에 비해 재구성한 평균치의 치관 형태가 근심 설측 우각 부위, 원심 설측 우각 부위에서 더 풍융하였고, 협측 치은 융기의 치경부 1/3부위가 더 풍융한 양상을 보였으며, 남자의 치관이 여자의 치관보다 더 풍융한 양상을 보였다. 일성의 기성 금속관은 평균치의 치관 형태보다 정사각형의 형태를 나타냈고, 근원심경이 더 긴 양상을 나타냈다.

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