CAJ | 학술논문

背景:微螺钉种植体植入部位是否会触及上颌窦是影响种植体安全性的主要因素,而骨质密度是影响稳定性的最重要因素之一.国内外学者对种植支抗的植入部位进行了研究,其主要针对骨厚度或骨密度之一对植入部位进行分析,但学者们对植入角度的看法不一.目的:观察上颌第二前磨牙与第一磨牙牙根间植入的微螺钉种植体与上颌窦的关系及其周围骨质密度值.设计、时间及地点:观察性实验,于2007-10/2008-05在广州暨南大学.对象:从澳门仁康牙科医疗中心就诊的正畸患者中选取38例患者的锥形线束CT资料,男11例,女27例,年龄18~35(24.8±3.8)岁.方法:在重建后的锥形线束CT影像上测量上颌第二前磨牙与第一磨牙牙根间矢状面上距离参考平面10,12,14,16 mm的4个植入高度上,以与骨皮质表面成30°,45°,60°,90°的4个方向共16个部位的颊舌侧骨质厚度,计算各植入部位触及上颌窦的危险率,在骨厚度大于6 mm的植入部位模拟植入微螺钉种植体并测量其周围骨质密度.主要观察指标:上颌窦高度,植入部位颊舌侧骨厚度,骨密度.结果:①16,14,12 mm 3个高度组中均以30°植入的微螺钉种植体周围骨密度值最大(P<0.05).②植入部位可分3类,其中,2类植入部位的危险率和骨密度值最大,1类植入部位的危险率和骨密度值最小,3类植入部位的危险率和骨密度值介于1类与2类之间.结论:①如果可以确保微螺钉种植体植入安全的情况下,当临床以12,14 mm或16 mm高度植入微螺钉种植体时,建议与骨皮质表面成30°植入以利于提高微螺钉种植体的稳定性.②如果未知微螺钉种植体植入是否安全,建议选安全性最好的1类部位.
배경:미라정충식체식입부위시부회촉급상합두시영향충식체안전성적주요인소,이골질밀도시영향은정성적최중요인소지일.국내외학자대충식지항적식입부위진행료연구,기주요침대골후도혹골밀도지일대식입부위진행분석,단학자문대식입각도적간법불일.목적:관찰상합제이전마아여제일마아아근간식입적미라정충식체여상합두적관계급기주위골질밀도치.설계、시간급지점:관찰성실험,우2007-10/2008-05재엄주기남대학.대상:종오문인강아과의료중심취진적정기환자중선취38례환자적추형선속CT자료,남11례,녀27례,년령18~35(24.8±3.8)세.방법:재중건후적추형선속CT영상상측량상합제이전마아여제일마아아근간시상면상거리삼고평면10,12,14,16 mm적4개식입고도상,이여골피질표면성30°,45°,60°,90°적4개방향공16개부위적협설측골질후도,계산각식입부위촉급상합두적위험솔,재골후도대우6 mm적식입부위모의식입미라정충식체병측량기주위골질밀도.주요관찰지표:상합두고도,식입부위협설측골후도,골밀도.결과:①16,14,12 mm 3개고도조중균이30°식입적미라정충식체주위골밀도치최대(P<0.05).②식입부위가분3류,기중,2류식입부위적위험솔화골밀도치최대,1류식입부위적위험솔화골밀도치최소,3류식입부위적위험솔화골밀도치개우1류여2류지간.결론:①여과가이학보미라정충식체식입안전적정황하,당림상이12,14 mm혹16 mm고도식입미라정충식체시,건의여골피질표면성30°식입이리우제고미라정충식체적은정성.②여과미지미라정충식체식입시부안전,건의선안전성최호적1류부위.
BACKGROUND: Miniscrew plant attachment to maxillary sinus is an important factor for implant safety and bone density can influence implant stability. Studies have explored implantation location of implant anchorage, such as bone thickness or bone density. However, the idea on implantation angle remains controversial. OBJECTIVE: To investigate the relationship between miniscrew implant in the interradicular space between the second premolars and the first molars in the maxilla and the maxillary sinus as well as bone density in the surroundings. DESIGN, TIME AND SETTING: Observation experiment was performed at dinan University from October 2007 to May 2008. PARTICIPANTS: A total of 38 patients with cone beam CT data were selected from Uni-Care Dental Center, Macao, including 11 males and 27 females, aged 18-35 (24.8±3.8) years. METHODS: Three dimensional images were reconstructed from cone beam CT images. For each subject, the buccolingual bone thickness was measured by postulating that the miniscrews would be inserted at 16 positions (10, 12, 14 and 16 mm above the median sagittal planes of the interradicular spaces between the first molars and the second premolars in the maxilla, and 30°, 45°, 60°, 90° from the cortical bone surface). The danger rate representing for implantation sites where buccolingual bone thickness was less than 6 mm was calculated. The density of the bone around the entire circumference of each miniscrew was also measured. MAIN OUTCOME MEASURES: Height of maxillary sinus, buccolingual bone thickness at implantation sites and bone density. The implantation sites could be divided into three groups. Group 2 exhibited the greatest danger rate and bone density and group 1 had the lowest danger rate and bone density.