디지털 광공정 방식에 의해 출력된 치과용 보철물의 품질 분석

Analysis of the quality of dental prostheses printed by digital light-processing technology

Purpose: This study aimed to assess the quality of dental prostheses printed by digital light-processing (DLP) technology. Methods: Ten experimental models were prepared. The ten specimens that were printed by DLP technology constituted the DLP group. The ten specimens that were produced in the same model by the casting method constituted the control group. The marginal gaps of the 20 specimens produced were measured. These gaps were measured by a silicon replica technique at two abutments of the specimen. Therefore, 20 marginal gaps were measured in each group. An independent sample t-test was performed to compare the marginal gaps measured in the two groups (&#x03B1;=0.05). Results: According to the results of the measurement, there was a significant difference between the mean marginal gap of the control group (78.8 &#x339B;) and that of the DLP group (91.5 &#x339B;), p<0.001. Conclusion: Although the mean marginal gaps of dental fixed prostheses produced by the DLP method was higher than the mean marginal gap of those produced by the casting method, it was considered to be within the clinical threshold value suggested by some previous studies.