Abstract
In order to analyze the relationship between teeth and basal bone for the maintainance of the good occlusion, the mesiodistal width of teeth, the basal arch width and the basal arch length were measured on the study model of the normal occlusion group and Angle's class I malocclusion group (non-extraction group, extraction group) The Maximum tooth material, the percentage of basal arch width to maximum tooth material, the percentage of basal arch length to maximum tooth material and the percentage of basal arch width plus basal arch length to maximum tooth material were caculated, and then statistical analysis was done. From thie study, the obtained results were as follows; 1. In maxilla, the percentage of basal arch width to maximum tooth material was $46.9{\pm}2.6\%$ in normal occlusion group, $49.4{\pm}3.9\%$ in non-extraction group, and $42.5{\pm}3.3\%$ in extraction group. In mandible, that was $46.6{\pm}2.4\%$ in normal occlusion group, $47.5{\pm}4.0\%$ in non-extraction group, and $42.6{\pm}2.6\%$ in extraction group. 2. In maxilla, the percentage of basal arch length to maximum tooth material was $33.4{\pm}1.9\%$ in normal occlusion group, $33.9{\pm}1.8\%$ in non-extraction group, and $28.7{\pm}2.5\%$ in extraction group. In mandible, that was $34.4{\pm}4.3\%$ in normal occlusion group, $36.5{\pm}1.9\%$ in non-extraction group, and $31.5{\pm}2.5\%$ in extraction group. 3. In maxilla, the percentage of basal arch width plus basal arch length to maximum tooth material was $80.3{\pm}3.4\%$ in normal occlusion group, $83.3{\pm}4.8\%$ in non-extraction group, and $71.2{\pm}4.3\%$ in extraction group. In mandible, that was $81.0{\pm}5.2\%$ in normal occlusion group, $84.0{\pm}5.4\%$ in non-extraction group, and $74.1{\pm}4.1\%$ in extraction group. 4. In Maxilla, the $95\%$ confidence interval of the percentage of basal arch width to maximum tooth material was $46.3-47.5\%$ in normal occlusion group, $48.1-50.7\%$ in non-extraction group, and $41.7-47.2\%$ in extraction group. In mandible, that was $46.1-47.2\%$ in normal occlusion group, $46.1-48.8\%$ in non-extraction group, and $42.0-43.3\%$ in extraction group. 5. In maxilla, the $95\%$ confidence interval of the percentage of basal arch length to maximum tooth material was $32.9-33.9\%$ in normal occlusion group, $33.3-34.5\%$ in non-extraction group, and $28.1-29.2\%$ in extraction group. In mandible, that was $33.4-3.4\%$ in noraml occlusion group, $35.8-37.2\%$ in non-extraction group, and $30.9-33.1\%$ in extraction group. 6. In maxilla, the $95\%$ confidence interval of thepercentage of basel arch width plus basal arch length to maximum tooth material was $79.5-81.0\%$ in normal occlusion group, $81.6-84.9\%$ in non-extraction group, and $70.1-72.2\%$ in extraction group. In mandible, that was $79.8-82.2\%$ in normal occlusion group, $82.1-85.5\%$ in non-extraction group, and $73.1-75.1\%$ in extraction group. 7. There was correlation between maxilla and mandible in the maximum tooth material, the basal arch width, the basal arch length, the percentage of basal arch width to maximum tooth material, the percentage of basal arch length to maximum tooth material and the percentage of basal arch width plus basal arch length to maximum tooth material, but not in the basal arch length of male of the extraction group. * A thesis submitted to the Council of the Graduate School of Kyungpook national University in partial fulfillment of the requirements for the degree of Master of Dental Science in December, 1991.
저자는 좋은 교합관계를 유지하기 위한 치아와 기저골과의 관계를 분석하기 위해 정상교합자와 Angle써 I급 부정교합자(비발치군, 발치군)의 경석고 모형상에서 최대치아근원심폭경, 기저악궁폭경 및 기저악궁장경을 계측하고 최대치아근원심폭경 합, 최대치아근원심폭경 합에 대한 기저악궁폭경 비, 최대치아근원심폭경 합에 대한 기저악궁장경 비 및 최대치아근원심폭경 합에 대한 기저악궁폭경과 기저악궁장경합의 비를 산출하여 통계학적으로 분석한 결과 다음과 같은 결과를 얻었다. 1. 최대치아근원심폭경합에 대한 기저악궁폭경 비는 상악에서 정상교합군은 $46.9{\pm}2.6\%$, 비발치군은 $49.4{\pm}3.9\%$, 발치군은 $42.5{\pm}3.3\%$로 나타났으며, 하악에서 정상교합군은 $46.6{\pm}2.4\%$, 비발치군은 $47.5{\pm}4.0\%$, 발치군은 $42.6{\pm}2.6\%$로 나타났다. 2. 최대치아근원심폭경합에 대한 기저악궁장경 비는 상악에서 정상교합군은 $33.4{\pm}1.9\%$, 비발치군은 $33.9{\pm}1.8\%$, 발치군은 $28.7{\pm}2.5\%$로 타나났으며, 하악에사 정상교합군은 $34.4{\pm}4.3\%$, 비발치군은 $36.5{\pm}1.9\%$, 발치군은 $31.5{\pm}2.5\%$로 나타났다. 3. 최대치아근원심폭경합에 대한 기저악궁폭경과 기저악궁장경 합의 비는 상악에서 정상교합군은 $80.3{\pm}3.4\%$, 비발치군은 $83.3{\pm}4.8\%$, 발치군은 $71.2{\pm}4.3\%$로 나타났으며, 하악에서는 정상교합군은 $81.0{\pm}5.2\%$, 비발치군은 $84.0{\pm}5.4\%$, 발치군은 $74.1{\pm}4.1\%$로 나타났다. 4. 최대치아근원심폭경합에 대한 기저악궁폭경 비의 $95\%$ 신뢰구간은 상악에서 정상교합군은 $46.3-47.5\%$, 비발치군은 48.1-50.7, 발치군은 $41.7-43.3\%$로 나타났으며, 하악에서 정상교합군은 $46.1-47.2\%$, 비발치군은 $46.1-48.8\%$, 발치군은 $42.0-43.3\%$로 나타났다. 5. 최대치아근원심폭경합에 대한 기저악궁장경비의 $95\%$신뢰구간은 상악에서 정상교합군은 $32.9-33.8\%$, 비발치군은 $33.3-34.5\%$, 발치군은 $28.1-29.2\%$로 나타났으며, 하악에서 정상교합군은 $33.4-35.4\%$, 비발치군은 $35.8-37.2\%$, 발치군은 $30.9-32.1\%$로 나타났다. 6. 최대치아근원심폭경합에 대한 기저악궁폭경과 기저악궁장경 합의 비의 $95\%$신뢰구간은 상악에서 정상교합군은 $79.5-81.0\%$, 비발치군은 $81.6-84.9\%$, 발치군은 $70.1-72.2\%$로 나타났으며, 하악에서 정상교합군은 $79.8-82.2\%$, 비발치군은 $82.1-85.5\%$, 발치군은 $73.1-75.1\%$로 나타났다. 7. 최대치아근원심폭경합, 기저악궁폭경, 기저악궁장경, 최대치아근원심폭경 합에 대한 기저악궁폭경 비, 최대치아근원심폭경 합에 대한 기저악궁장경 비 및 최대치아근원심폭경 합에 대한 기저악궁폭경과 기저악궁장경 합의 비에서 발치군 남자의 기저악궁장경을 제외하고는 상하악간에 상관관계가 있는 것으로 나타났다.