3DSS-Ⅱ彩色结构光扫描系统测量重建基牙预备体的可靠性和准确性研究

A study on the reliability and accuracy of reconstructing abutment tooth with 3DSS-Ⅱ color structured-light scanning system

目的:评价3DSS-Ⅱ彩色结构光扫描系统测量并重建基牙预备体的可靠性与准确性。方法:采用3DSS-Ⅱ彩色结构光扫描系统对1、2、3、5、65颗牙的基牙预备体石膏模型进行三维测量并重建,分别利用Geomagic6.0软件和游标卡尺测量相关几何指标,应用统计分析方法,考察系统的可靠性和准确性。结果:利用3DSS-Ⅱ彩色结构光扫描系统获得了基牙预备体的三维数字化模型;每项实验中各组间数据相关性好且无明显差异(r≈1,P<0.001);以游标卡尺测量结果为标准,系统误差范围为-0.269～0.269mm。结论:3DSS-Ⅱ彩色结构光扫描系统能够完成基牙预备体的测量和重建,系统可靠性强,但其精度尚无法满足基牙预备体数字化印模的要求。

Objectlve：To evaluate the reliability and accuracy of 3DSS-Ⅱ color structured-light scanning system for scanning and reconstructing the model of abutment tooth. Methods ：5 plaster maxillary abutment tooth models were scanned and reconstructed by 3DSS-Ⅱ color structured-light scanning system, and then the 3D shapes of the models were measured by Geomagic 6.0 software and the plaster models were measured by manual with vernier caliper. The data were statistically analyzed. Results ：The graphs of point-cloud were obtained from scanning surfaces of abutment tooth models. There were close correlations and no significant differences between different groups（r≈1, P〈0.001 ）. Using standard of data obtained by vernier caliper, the errors of the system ranged from - 0.269 mm to ＋ 0.269 mm. Conclusion： It is feasible and reliable to scan and reconstruct the model of abutment tooth by 3DSS-Ⅱ color structured-light scanning system, but its precision can not meet the standard of digital impression of abutment tooth.