한국인의 위턱굴바닥과 이틀돌기의 형태계측학적 분석

Abstract

The implant placement and sinus floor elevation on maxillae have required the accurate understanding of maxillary sinus floor and alveolar process. Therefore, the purpose of this study was to investigate the maxillary sinus floor morphology and the correlation between maxillary sinus floor and alveolar process in Korean. Twenty-nine cadaveric maxillae with normal teeth were used, with age at death ranging from 40 to 90 years (mean: 59.9 years). After the maxilla was cut above the nasal cavity floor, it was decalcificationed. And then, it was sectioned at midline of the tooth from 1st premolar to 2nd molar by parallel to long axis of the tooth. The specimens were scanned using the Scanner (HP Scanjet G4050, Hewlett Packard Co., Houston, Tex, USA). The scan image was measured using Adobe Photoshop CS3 (ver.10, USA) at the 0.01 ㎜. Mean, SD, and correlation coefficient(r) were took using SPSS. The results were as follows; 1. The length of maxillary sinus at nasal cavity floor level was 26.55±6.47 ㎜. 2. The width of maxillary sinus at nasal cavity floor level was 7.87±3.04 ㎜ at 1st premolar (P1), 11.05±4.40 ㎜ at 2nd premolar (P2), 13.21±4.78 ㎜ at 1st molar (M1), and 12.47±4.32 ㎜ at 2nd molar (M2). 3. The depth of maxillary sinus at nasal cavity floor level was -3.74±4.57 ㎜, -4.77±4.80 ㎜, -4.84±4.69 ㎜, and -4.19±6.24 ㎜ at P1, P2, M1, and M2, respectively. 4. The correlation coefficient(r) between the depth and width of maxillary sinus was 0.450, 0.654, 0.733, and 0.742 at P1, P2, M1, and M2, respectively, with deeper the maxillary sinus floor being wider. 5. The height of alveolar bone was 19.02±3.36 ㎜, 15.71±4.44 ㎜, 13.59±3.22 ㎜, and 12.50±2.99 ㎜ at P1, P2, M1, and M2, respectively. 6. The correlation coefficient(r) between the width of maxillary sinus and the height of alveolar bone was 0.342, 0.631, 0.602, and 0.543 at P1, P2, M1, and M2, respectively, which were lack of correlations. 7. The correlation coefficient(r) between the depth of maxillary sinus and the height of alveolar bone was 0.808, 0.899, 0.789, and 0.805 at P1, P2, M1, and M2, respectively. It represented that the deeper the maxillary sinus depth, the lower the alveolar bone height was. In conclusion, the maxillary sinus floor in Korean was the deepest and the widest at M1, and the alveolar bone height was the lowest at M2. This result provided useful anatomic information about maxillary sinus floor for the implant placement and sinus floor elevation.