上下颌牙槽骨不同部位骨密度的螺旋CT研究  

Study of bone mineral density in different locations of the alveolar bone using spiral computed tomography

作　　者：胡明华[1] 米丛波[1] 聂晶[1] 居曼江.买买提 钱雅婧[1] 

机构地区：[1]新疆医科大学第一附属医院口腔正畸科,乌鲁木齐830054

出　　处：《中国骨质疏松杂志》2011年第2期145-149,共5页Chinese Journal of Osteoporosis

摘　　要：目的运用螺旋CT测量上下颌牙槽骨不同部位的骨密度,为种植体支抗的安全植入提供参考。方法选取2008年7月至12月在新疆医科大学第一附属医院医学影像中心进行螺旋CT扫描的44例汉族男女性患者,年龄范围20～50岁,要求扫描范围包括上下颌牙齿、牙槽骨及基骨,应用ADW4.2独立影像诊断工作站在CT横断面图像上确定测量部位(切牙区、尖牙区、双尖牙区、磨牙区)后,然后在冠状位及矢状位图像上选取自该区域牙槽嵴顶向根方6 mm处为该区骨密度测量区域,获得其唇(颊)侧、舌(腭)侧皮质骨及松质骨骨密度的CT值。结果 1)上颌骨前磨牙区颊侧皮质骨骨密度高于上颌其他区域颊侧皮质骨,腭侧骨密度最高处为尖牙区,颊侧及腭侧各测量区域之间皮质骨骨密度有统计学差异,松质骨骨密度之间无统计学差异;2)下颌骨自切牙区至磨牙区颊侧皮质骨骨密度逐渐增加,舌侧皮质骨骨密度亦显示出类似的趋势,松质骨骨密度之间无统计学差异;3)比较同一区域上下颌骨皮质骨密度,除了切牙区皮质骨密度差异不大,下颌各区域皮质骨骨密度均高于上颌同区域皮质骨骨密度,松质骨骨密度之间无统计学差异。结论根据不同区域的骨密度,种植体的设计及植入方式有所区别。Objective To measure the bone mineral density in different locations of the maxillare and mandibular alveolar bone using spiral CT and to provide a reference for safely implanting anchorage. Methods Forty-four Han nationality people aged 20-50 years old who visited the First Affiliated Hospital of Xinjiang Medical Imaging Center from July to December in 2008 were included. The CT scan range contained the maxillare and mandibular tooth, the alveolar bone and base bone. The measuring locations （anterior teeth, canine area, molar area and molar area） were determined on the horizontal CT scan images using ADW4.2 independent image diagnostic work station. CT values of the BMDs of the lip （bueeal） and lingual （palatal） side cortical and trabeeular bone were measured in the area at 6ram from the crest to the root side from the paracoronal view and the sagittal view. Results 1 ） In the maxilla, the buccal cortical BMD of the alveolar bone at the premolar area was the highest, and the BMD at the canine area was the highest point in the palate. There was significant difference of BMD in the cortical bone between the buccal and the palatal area. There was no significant difference of BMD in the trabecular bone at the same area. 2） In the mandible, the buccal cortical bone showed a progressive increase in BMD from the incisor to the molar areas, and the lingual cortical bone showed a similar trend as the buecal cortical bone. There was no significant difference of BMD at the cancellous bone. 3） Comparing the BMD of cortical bone between the maxilla with the mandible at the same area, the BMD of mandibular was significantly higher than that of the maxilla, except at the incisor area. There was no significant difference of BMD at the cancellous bone. Conclusion The design and planting of the anchorage should be different according to the BMD at different locations.

关 键 词：种植支抗 上下颌牙槽骨 骨密度 CT值 

分 类 号：R443[医药卫生—诊断学]