下颌第一磨牙种植体解剖式愈合基台的设计与制作

Design and fabrication of anatomic healing abutment for mandibular first molar implant

目的探讨下颌第一磨牙种植体解剖式愈合基台的设计与制作,为临床上提供更多愈合基台的选择。方法利用Shining扫描仪技术对离体下颌第一磨牙扫描获得牙颈部的颊舌径和近远中径数据,以及天然离体牙4个轴面牙颈部的坡度数据;统计分析数据后利用计算机辅助设计/计算机辅助制造(computer aided design/computer aidedmanufacturing,CAD/CAM)原理设计制取下颌第一磨牙解剖式愈合基台。结果测得下颌第一磨牙离体牙釉牙骨质界(cementoenamel junction,CEJ)向下1 mm近远中径与颊舌径均值为(8.54±0.78)mm、(7.87±0.86)mm,离体牙颊、舌、近中、远中各轴面牙颈部坡度分别为17.53°、14.41°、13.40°、13.43°,根据下颌第一磨牙天然牙缩小一定比例获得3种不同周径高度为5 mm的解剖式愈合基台。结论利用Shining扫描及CAD/CAM技术可快速获得下颌第一磨牙解剖式愈合基台。

Objective To explore the design and manufacture of anatomical healing abutment for mandibular first molar implant in order to provide more choices for clinical healing abutment.Methods The buccal lingual diameter and mesial distal diameter of the tooth neck,as well as the slope data of the four axial surfaces of the natural isolated teeth,were obtained by scanning the isolated mandibular first molar with a shining scanner.After statistical analysis of the data,the anatomical healing abutment of the mandibular first molar was designed and constructed using computer aided design/computer aided manufacturing(CAD/CAM).Results The mean buccal and lingual diameters of the mesi⁃al and distal diameters of the isolated mandibular first molars were(8.54±0.78)mm and(7.87±0.86)mm,and the tooth neck slopes of each axial surface of the isolated mandibular first molars were 17.53°(buccal),14.41°(lingal),13.40°(mesial)and 13.43°(distal),respectively.Three anatomical healing abutments with different peripheral diameters and heights of 5 mm were obtained according to a certain proportion of reduction of the natural teeth of the mandibular first molars.Conclusion The anatomical healing abutment of the mandibular first molar can be quickly obtained by Shining scanning and CAD/CAM technology.