摘要
[摘要]目的：利用锥形束CT（codebeamcomputedtomography，CBCT）图像研究测量下颌前牙区的颌骨形态和宽度，为临床种植手术提供治疗依据。方法：选取2011年--2013年间50名成年受试者的CBCT检查结果，利用CBCT图像对下颌前牙区颌骨外形、唇舌侧宽度、近远中距离等进行观察和测量。结果：1．下颌前牙区颌骨形态唇侧均为凹形，最凹点位于下颌骨上中份，舌侧外形多样化，凸形比例最高。2．下颌骨前牙区颌骨唇舌侧宽度在下颌骨中1／2和下颌骨下缘较宽，在牙槽嵴顶和根尖区较窄。3．左右尖牙、侧切牙、中切牙于牙槽嵴顶的近远中距离是4．46～6．94mm，尖牙最长，侧切牙次之，中切牙最小。结论：下颌前牙缺失后，尤其是下颌侧切牙或中切牙个别缺失，如行种植修复近远中距离可能不足，易损伤邻牙；植入种植体等手术时应当注意下前牙区颌骨外形，避免因倒凹导致唇舌侧穿通；CBCT可作为下颌前牙区种植手术术前的常规影像学检查手段。
Objective：To investigate and measure anterior mandibular jaw bone for clinical application using cone beam computed tomography （CBCT）. Methods：Fifty HaM-Chinese adults were selected in this study between Jan. 2011 and Jan. 2013. All CBCTs of the 50 adults were reconstructed to evaluate and measure the shape, bucca-lingual width and mesial and distal distance at alveolar crest of anterior region of mandible. Results： Buccal shape of anterior mandible was concave in all cases and the most concave point was lo- cated on the upper and middle one third of mandible mostly. Shape of lingual was diversified, and those of convex account for a high percentage. For the bucca-lingual width, middle and lower margin of anterior mandibular jaw bone were wider than that of alveolar crest and apex of tooth. Mesial and distal distance at alveolar crest of anterior mandible were between 4.46mm and 6.94 mm, canine had maximum distance, lateral incisor was next to canine and central incisor had minimum distance. Conclusions：When implanting in mandibular anterior alveolar, especially in the case of single central incisor or lateral incisor missing, implant may not achieve enough space and adjacent teeth were easy to be affected. Care should be taken of the shape of mandible to avoid buccal and lingual penetration when doing implant surgery in anterior mandible. It was suggested that CBCT should be a routine examination before implant surgery.
出处
《口腔生物医学》
2013年第4期181-185,共5页
Oral Biomedicine
基金
国家重点基础研究发展计划(973计划
2012CB966902)
江苏高校优势学科建设工程一期项目(JX10531802/002)
关键词
颌骨
下颌前牙区
锥形束CT
口腔种植
Jaw bone
Anterior mandible
Cone beam computed tomography
Dental implant
