CAJ | 학술논문

背景：研究表明植入部位牙槽骨骨皮质厚度是影响微种植体初期稳定性的重要因素，因此了解颌骨骨皮质厚度对选择微种植体植入部位和预测种植成功率十分重要。目的：探讨青少年安氏Ⅱ类Ⅰ分类错颌患者上颌后牙区颊侧骨皮质厚度分布规律。方法：获取52例青少年安氏Ⅱ类Ⅰ分类错颌患者锥形束CT影像资料，男女各26例，测量男、女两组上颌骨14-15间、15-16间、16-17间、24-25间、25-26间、26-27间距离牙槽嵴顶分别为2，4，6，8 mm水平的颊侧骨皮质厚度。结果与结论：①组内比较：在女性组中，左侧与右侧上颌后牙区根间颊侧骨皮质厚度比较差异无显著性意义(P >0.05)，上颌5-6根间距离牙槽嵴顶2 mm水平处的颊侧皮质骨厚度低于距离牙槽嵴顶8 mm水平处(P <0.05)，上颌6-7根间距离牙槽嵴顶2 mm水平处的颊侧皮质骨厚度低于距离牙槽嵴顶8 mm水平处(P <0.05)，颊侧骨皮质厚度在同一根间位置表现出由牙槽嵴向根尖增厚的趋势，距离牙槽嵴顶8 mm水平处最大；在距离牙槽嵴顶8 mm水平处，上颌4-5根间骨皮质厚度低于6-7根间(P <0.05)。男性组与女性组表现相同。②组间比较：男性组与女性组对应位点的骨皮质厚度比较差异均无显著性意义(P >0.05)。表明青少年安氏Ⅱ类Ⅰ分类错颌上颌4-5、5-6、6-7根间距离牙槽嵴顶2，4，6，8 mm水平的双侧颊侧皮质骨厚度均可满足微种植钉植入要求；从第一前磨牙往牙弓后部移行，颊侧骨皮质骨厚度在各位点分布较均匀；上颌后牙区颊侧距离牙槽嵴顶6 mm以上的范围多靠近上颌窦，植入时避开此区，防止上颌窦穿通；颊侧骨皮质厚度由牙槽嵴顶向根尖方向逐渐增大，越靠近根方，厚度越大，植入时可以获得更好的初期稳定性。
배경：연구표명식입부위아조골골피질후도시영향미충식체초기은정성적중요인소，인차료해합골골피질후도대선택미충식체식입부위화예측충식성공솔십분중요。목적：탐토청소년안씨Ⅱ류Ⅰ분류착합환자상합후아구협측골피질후도분포규률。방법：획취52례청소년안씨Ⅱ류Ⅰ분류착합환자추형속CT영상자료，남녀각26례，측량남、녀량조상합골14-15간、15-16간、16-17간、24-25간、25-26간、26-27간거리아조척정분별위2，4，6，8 mm수평적협측골피질후도。결과여결론：①조내비교：재녀성조중，좌측여우측상합후아구근간협측골피질후도비교차이무현저성의의(P >0.05)，상합5-6근간거리아조척정2 mm수평처적협측피질골후도저우거리아조척정8 mm수평처(P <0.05)，상합6-7근간거리아조척정2 mm수평처적협측피질골후도저우거리아조척정8 mm수평처(P <0.05)，협측골피질후도재동일근간위치표현출유아조척향근첨증후적추세，거리아조척정8 mm수평처최대；재거리아조척정8 mm수평처，상합4-5근간골피질후도저우6-7근간(P <0.05)。남성조여녀성조표현상동。②조간비교：남성조여녀성조대응위점적골피질후도비교차이균무현저성의의(P >0.05)。표명청소년안씨Ⅱ류Ⅰ분류착합상합4-5、5-6、6-7근간거리아조척정2，4，6，8 mm수평적쌍측협측피질골후도균가만족미충식정식입요구；종제일전마아왕아궁후부이행，협측골피질골후도재각위점분포교균균；상합후아구협측거리아조척정6 mm이상적범위다고근상합두，식입시피개차구，방지상합두천통；협측골피질후도유아조척정향근첨방향축점증대，월고근근방，후도월대，식입시가이획득경호적초기은정성。
BACKGROUND:Mini-screw stability is primarily related to alveolar bone cortical thickness. It is necessary to learn cortical thickness to choose suitable implanting sites and predict success rate. OBJECTIVE:To evaluate the buccal cortical thickness in maxilary posterior area of Class II Division I malocclusion adolescents. METHODS: Fifty-two adolescents (including 26 male and 26 female) of Class II Division I malocclusion scanned by Cone Beam Computer Tomography were involved in this study. The buccal cortical thickness of six posterior interradicular sites (14-15, 15-16, 16-17, 24-25, 25-26, 26-27) at four bone levels (2, 4, 6, 8 mm) from the alveolar crest in both boys and girls were measured. RESULTS AND CONCLUSION: (1) There was no statisticaly significant difference in alveolar cortical thickness between left and right sides in the girls (P > 0.05); cortical thickness of 5-6 and 6-7 at 8 mm was thicker than that at 2 mm (P < 0.05) and cortical thickness of 6-7 at 2 mm was smaler than that at 8 mm (P < 0.05). The cortical thickness increased from crest to base of alveolar crest and reached the peak at 8 mm. Cortical thickness of 6-7 was thicker than 4-5 at 8 mm depth (P < 0.05). The results of males were the same as females. (2) There was no statisticaly significant difference in alveolar cortical thickness of the same site between males and females (P > 0.05). Al sites in this study were suitable for mini-screw implantation; from the first molar to posterior dental arch, buccal cortical thickness is wel-distributed; it is dangerous for implantation in the areas around the first molar more than 6 mm, where the frequent presence of the maxilary sinus is observed. There is an increase of buccal cortical thickness from crest to base of alveolar crest, obtaining good initial stability.