关键词: 牙种植, 外科定位模板, 计算机断层, dental implant, surgical stent, computed tomography

Abstract: Abstract:　Objective　By fabricating the surgical stents for implants and analyzing the computed tomography data, realize accurate placement of dental implants and aesthetic restoration. Methods　Twenty patients with some teeth missing were chosen. Impressions were taken, and plaster casts were obtained. According to adjacent teeth and jaw relationship in the plaster models, the surgical stents for implants were fabricated. Patients with stents were CT scanned. All the data were analyzed by a teeth and jaw measurement software. Results　CT data reconstruction could accurately obtain three dimensional anatomic structures of implantology site, and the software could accurately measure the width of bone tissue from bucal to lingual side, the height from the top of bone tissue to the mandibular canal or to the bottom of the maxillary sinus. Thickness of the soft tissue could also be accurately measured. Placement and direction of all implants were very good, and no complication happened. Conclusion　The surgical stents for implants and CT imaging analysis can be effectively used to measure structure of the jaw and help doctors to select the lengths and diameters of dental implants.