CAJ | 학술논문

目的：研究口腔颌面部高速投射物伤导致的牙周膜间接损伤的特点。方法：将18只实验犬随机分为6组，以直径6．0 mm、质量0．88 g的高速投射物致伤右下颌骨体部第四前磨牙根尖下方区域，但不直接伤及牙齿；分别于伤后6h、24h、3d、7d、2w及4w处死实验犬，观察右下颌第四前磨牙、第二前磨牙及左下颌第二前磨牙牙周膜的组织病理学表现。结果：右下颌第四前磨牙和第二前磨牙的牙周膜损伤较明显，但病理学变化可逆；左下颌第二前磨牙牙周膜仅见一过性血管扩张、充血。结论：口腔颌面部高速投射物伤可导致牙周膜发生间接损伤，病理学变化可逆；损伤程度随着牙齿与伤区距离的增加而递减。
목적：연구구강합면부고속투사물상도치적아주막간접손상적특점。방법：장18지실험견수궤분위6조，이직경6．0 mm、질량0．88 g적고속투사물치상우하합골체부제사전마아근첨하방구역，단불직접상급아치；분별우상후6h、24h、3d、7d、2w급4w처사실험견，관찰우하합제사전마아、제이전마아급좌하합제이전마아아주막적조직병이학표현。결과：우하합제사전마아화제이전마아적아주막손상교명현，단병이학변화가역；좌하합제이전마아아주막부견일과성혈관확장、충혈。결론：구강합면부고속투사물상가도치아주막발생간접손상，병이학변화가역；손상정도수착아치여상구거리적증가이체감。
Objective:To investigate the characteristics of indirect injury of periodontal membrane caused by high speed projectile in oral and maxillofacial region. Method:18 dogs were divided into six groups with random allocation,then a high speed projectile(φ6.0mm, 0.88 g) was shot into the body of right mandible(the region below the fourth premolar) of each dog, but the teeth were not injured directly. The experimental dogs were put to death 6h,24 h,3 d,7 d,2 wk and 4 wk later;then the histopathologic manifestations of periodontal membrane of the fourth premolar of right mandible,the second premolar of right mandible and the second premolar of left mandible were observed. Result:The periodontal membrane of the fourth premolar and the second premolar of right mandible was injured visibly,but the pathologic changes were re-versible;yet the periodontal membrane of the second premolar of left mandible was injured slightly and temporarily. Con-clusion:The wound of high speed projectile in oral and maxillofacial region can cause indirect injury of periodontal mem-brane,but the pathologic changes are reversible;traumatic severity decreases as the distance of the tooth to the wound area increases.