螺旋CT评价青少年与成年人牙槽骨皮质骨密度及厚度的差异  

Spiral CT evaluation of the alveolar cortical bone mineral density and bone cortex thickness of teenagers and adults

作　　者：郄会[1] 王文娟 樊世锋[3] 周冠军[1] 李晨曦[1] 芦琳[1] 单丽华[1] 

机构地区：[1]河北医科大学第二医院口腔正畸科,石家庄050000 [2]宁波口腔医院正畸科 [3]河北医科大学第三医院口腔科

出　　处：《实用口腔医学杂志》2017年第5期665-668,共4页Journal of Practical Stomatology

摘　　要：目的:通过螺旋CT测量,评价不同年龄(青少年12~18岁,成年人19~48岁)、性别及位置在牙槽骨皮质骨的厚度及密度的差别。方法:对60例12~48周岁患者(男27例,女33例,青少年组35例,成人组25例)进行颌骨螺旋CT扫描,在12个牙根间部位测量牙槽嵴顶至14 mm高度的颊侧皮质骨厚度及灰度值。结果:上下颌骨的皮质骨厚度及密度总体趋势表现为随着距牙槽嵴顶垂直距离增大而增大。上下颌前部皮质骨厚度平均为1.0~1.5 mm。上颌后部厚度为1.1~1.8 mm,下颌后部为1.5~2.8 mm。下颌后部皮质骨厚度及密度明显高于上颌后部(P<0.05)。皮质骨厚度无明显年龄及性别差异,而青少年皮质骨密度明显低于成年人(P<0.05)。成年人下颌后部骨密度最高,而青少年时期上颌后部骨密度最低。结论:青少年皮质骨密度明显低于成年人,上颌后部最低,而成年患者的下颌后部皮质骨较厚且硬度较大。Objective： To compare the alveolar cortical bone density and thickness of jaw bones between teenagers （ 12 - 18 years of age） and adults（ 19 -48 years of age）. Methods： Spiral computed tomographic images of 60 cases were obtained from the subjects with the ages of 12 to 48 years（27 Males and 33 females, 35 teenagers and 25 adults）. Buccal cortical bone thickness and density in Hounsfield units were measured at 12 interradicular sites and to a depth of 14 mm. Results： The alveolar cortical bone thicknesses and densities of the jaw bones significantly increased from the crest to base of alveolar crest. The average cortical bone thicknesses ranged from 1.0 to 1.5 mm in the anterior part of the jaw bones, 1.1 to 1.8 mm in maxillary posterior area and 1.5 to 2.8 mm in the mandi- ble posterior areas. The cortical bone thickness and density were greater in the mandible than in the maxilla（P 〈 0.05 ）. The thickness values did not show difference between males and females, between adolescents and adults. Higher values of bone density were found in the adults than in the teenagers （P 〈 0.05）. The highest bone density in the mandible posterior area of adults was observed, and the lowest bone density in the maxillary posterior area of adolescents. Conclusion： Alveolar cortical bone density of adolescents is lower than that of adults, especially in the maxilla posterior region.

关 键 词：皮质骨厚度 皮质骨密度 微型种植体 螺旋CT 

分 类 号：R783.5[医药卫生—口腔医学]