Effect of build angles and support densities on selective laser melting accuracy of cobalt-chromium clasps
10.12007/j.issn.0258-4646.2024.06.009
- VernacularTitle:不同构建角度和支撑密度对选区激光熔化钴铬合金卡环准确性的影响
- Author:
Jialing ZHOU
1
,
2
;
Shan YAN
;
Luxiang YU
;
Peng WANG
;
Lu LIU
;
Fabing TAN
Author Information
1. 重庆医科大学附属口腔医院修复科,重庆 400015
2. 口腔疾病与生物医学重庆市重点实验室,重庆 401147
- Keywords:
build angle;
support density;
selective laser melting;
cobalt-chromium alloy clasps;
accuracy
- From:
Journal of China Medical University
2024;53(6):536-540,554
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the accuracy of selective laser melting of cobalt-chromium(CoCr)clasps with different build angles and support densities.Methods The 3D software constructed a sample clasp(reference object)with an undercut depth of 0.50 mm,which was then imported to a metal 3D printer to form CoCr clasps at different build angles(0°,45°,and 90°)and support densities(0.50,0.70,0.90,and 1.10 mm).A model scanner was used to obtain scans of all clasps(test objects);the test objects were aligned with the reference object and test subjects were aligned with each other through a best-fit alignment method using Geomagic software to obtain root mean square error(RMSE)values for the accuracy of the clasps.The data were statistically analyzed using one-way analysis of variance or non-parametric rank sum test(α=0.05).Results In terms of trueness,the different build angle groups with support density of 0.50 mm were ranked by RMSE values as follows:90°group>0°group>45°group.For the different build angle groups with support densities of 0.70,0.90,and 1.10 mm,the RMSE values ranked as follows:45°group>90°group>0°group.In terms of precision,the different build angle groups with support density of 0.50 mm were ranked by RMSE values as follows:90°group>0°group>45°group.For support density of 0.70 mm,the ranking was 90°group>45°group>0°group,while for support densities of 0.90 and 1.10 mm,the ranking was 45°group>90°group>0°group.Conclusion The accuracy of CoCr clasps varies with the build angle and support density.However,clasps produced at a build angle of 0°and a support density of 0.90 mm exhibit higher accuracy and are recommended for use in clinical and technical laboratories.
