|
KMID : 1035320170440040329
|
|
Korean Society for Dental Materials
2017 Volume.44 No. 4 p.329 ~ p.336
|
|
|
Evaluation on machining accuracy according to convergence angle and radius of curvature value used for fabricating custom abu
|
|
Hong Min-Ho
Choi Sung-Min
Kwon Tae-Yub
|
|
|
Abstract
|
|
|
|
This study evaluates the machining accuracy of the custom abutment design according to the selected convergence angle and radius of curvature value in the CAD program. Ten custom abutments were designed based on dental CAD. And then, the fabricated custom abutment was scanned ten times using a contact scanner. The data of the scanned custom abutment was saved as “Test STL” file. The Geomagic studio software was used to superposition each exported as an “Test STL” file with the CAD-reference-model STL file (CRM) specified by the same name. In the experimental results, the A8 group (convergence angle 8°) showed lower error than the A4 group (convergence angle 4°) . In addition, the higher the radius of curvature, the less error in the top and chamfer regions of the custom abutment (p< 0.05). Overall, the convergence angle and radius of curvature value in the custom abutment design were found to affect the machining accuracy.
|
|
|
KEYWORD
|
|
|
Custom abutment, Dental CAD/CAM, Curvature radius, Machining Accuracy
|
|
|
FullTexts / Linksout information
|
|
|
|
|
Listed journal information
|
|
|