锥形束CT对颏部可移植骨块厚度及高度的测量

目的:应用锥形束CT(CBCT)测量下颌颏部可取骨块的厚度及高度,为自体骨移植提供临床指导.方法:对132例中国汉族正常人CBCT的下颌矢状面图像进行测量分析.观察指标:在牙体正中矢状面上,测量根尖向根方5mm中心处至唇侧皮质骨表面的距离(UD)、下颌骨下缘向冠方5mm中心处至唇侧皮质骨表面的距离(DD)以及两者间的垂...

Measurement of thickness and height of the autogenous graft bone in mandibular anterior region by cone-beam computed tomography examination

Objective:To analyze the donor bone thickness and height in mandibular anterior region by cone-beam computed tomography(CBCT)for providing the theoretical basis for bone grafting.Methods:132 individuals with normal occlusion were examined with CBCT to analyze the sagittal planes between the bilateral mental foramen.Results:The thickness of the autogenous graft bone was from(4.49±0.69)to(6.20±0.76)mm,and the height was from(9.32±2.83)to(13.04±2.33)mm.The thickness of bone under the root of mandibular incisor for grafting was from(4.49±0.69)to(4.64±0.68)mm,while the height of bone under the mandibular canine was from(9.32±2.83)to(9.48±2.75)mm,which both show significant differences compared with the other teeth on the same side.The percentages were 76.5%and 68.2%respectively that neural tubes were seen 5 mm in front of left/right mental foramen.Conclusion:The data of bone mass for grafting from mandibular symphysis provides clinical references for dentists who should analyze CBCT carefully before implant surgery to minimize the risk of important tissue injury.