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Evaluation of internal adaptation of PMMA 3-unit bridge manufactured by 5-axis milling machine
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 Title & Authors
Evaluation of internal adaptation of PMMA 3-unit bridge manufactured by 5-axis milling machine
Kim, Chong-Myeong; Kim, Jae-Hong; Kim, Ji-Hwan; Kim, Woong-Chul;
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 Abstract
Purpose: The purpose of this study was to assess the internal fitness of the PMMA 3-unit bridge that was fabricated with 5-axis milling machine and to verify the clinically allowable values. Methods: For fabrication of the crown bridge in this study, 25-27 abutment teeth were used. The prepare abutment teeth were scanned with a scanner and 3-unit bridge was designed by using design software. Upon the completion of the design, the 3-unit bridge was fabricated by using a PMMA block with 5-axis milling machine. The internal surface of the fabricated 3-unit bridge was scanned by using a scanner and the difference between the 3-unit bridge and the abutment teeth was assessed by merging them together. Results: values for PRE group, MOL group, and BRI group were , , and , respectively. The mean of the PRE group was bigger than that of the MOL and BRI group; however, statistically significant difference was not found (p>0.05). Conclusion: The PMMA 3-unit bridge that was fabricated with 5-axis milling machine presented stable internal values for each crown and overall internal values were within the range of clinically allowable values.
 Keywords
Dental CAD/CAM;Internal adaptation;Provisional crown;Subtractive method;Three-dimensional;5-axis milling;
 Language
Korean
 Cited by
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