【摘要】 目的探讨不同垂直骨面型成人上下颌骨后牙区微螺钉种植体拟植入部位的骨皮质厚度,为临床植入微螺钉种植体提供参考。方法 57例正畸成人患者,髙角组20例、均角组22例、低角组15例;拍摄头颅CBCT,在三维重建模型上测量上颌骨颊、腭侧及下颌骨颊侧骨皮质厚度,进行统计学分析。结果 3组间多数测量部位平均骨皮质厚度的差异均有统计学意义(P<0.05),且高角组的平均骨皮质厚度最小,低角组的平均骨皮质厚度最大。结论髙角患者在上颌后牙区植入微螺钉种植体需谨慎。更多还原

【Abstract】 Objective To provide some references of using miniscrew implants in clinical orthodontic treatment,the bone thickness of maxilla and mandible of different vertical facial type in adults with cone-beam CT(CBCT) was measured. Methods 57 scanned patients were selected as subjects. Among them, 20 were included in the high-angle group, 22 in the normal-angle group, and 15 in the low-angle group. On volumetric images, we measured the buccal and palatal cortical bone thickness of maxilla, the buccal cortical bone thickness of mandible from canine to the second molar teeth at heights of 4.0 mm from cemento-enamel junction(CEJ). The mean of cortical bone thickness was compared between three groups. Results There were statistical differences among three different vertical facial groups in the cortical bone thickness(P<0.05). The high-angle group has the thinnest cortical bone while the low-angle group has the thickest. Conclusion Clinicians should be aware of the probability of thin cortical bone plates and the risk of miniscrew implant failures at maxillary posterior miniscrew implant sites in high-angle patients.更多还原