Comparing volumetric and biological aspects of 3D-printed interim restorations under various post-curing modes
송건, 손지원, 장지현, 최성현, 장우형, 이빈나, 박찬,
소속 상세정보
송건 ( Song Gun ) - Chonnam National University School of Dentistry Department of Conservative Dentistry
손지원 ( Son Ji-Won ) - Chonnam National University School of Dentistry Department of Conservative Dentistry
장지현 ( Jang Ji-Hyun ) - Chonnam National University School of Dentistry Department of Conservative Dentistry
최성현 ( Choi Sung-Hyeon ) - Chonnam National University School of Dentistry Department of Conservative Dentistry
장우형 ( Jang Woo-Hyung ) - Chonnam National University School of Dentistry Department of Prosthodontics
이빈나 ( Lee Bin-Na ) - Chonnam National University School of Dentistry Department of Conservative Dentistry
박찬 ( Park Chan ) - Chonnam National University School of Dentistry Department of Prosthodontics
Abstract
PURPOSE: This study aims to compare the volumetric change, degree of conversion (DOC), and cytotoxicity of 3D-printed restorations post-cured under three different conditions.
MATERIALS AND METHODS: 3D-printed interim restorations were post-cured under three different conditions and systems: 5 min, 30 min, and 24 h. Three-unit and six-unit fixed dental prostheses (n = 30 for each case) were printed; ten specimens from each group were post-cured and then scanned to compare their volumetric changes. Root-mean-squared (RMS) values of the data were acquired by superimposing the scanned files with original files. Thirty disk-shaped specimens were printed to evaluate the DOC ratio. Fourier transform infrared spectroscopy was used to compare the DOCs of 10 specimens from each group. Human gingival fibroblasts were used to measure the cell viability of every specimen (n = 7). The data from this experiment were employed for one-way analysis of variance and Tukey's post-hoc comparisons.
RESULTS: Differences between the three-unit restorations were statistically insignificant, regardless of the post-curing conditions. However, for the six-unit restorations, a high RMS value was acquired when the post-curing duration was 30 min. The average DOC was approximately 56 ? 62%; the difference between each group was statistically insignificant. All the groups exhibited cell viability greater than 70%, rendering them clinically acceptable.
CONCLUSION: The post-curing conditions influenced the volume when the length of the restoration was increased. However, this deviation was found to be clinically acceptable. Additionally, post-curing did not significantly influence the DOC and cytotoxicity of the restorations.
키워드
3D printing; Interim restoration; Post-curing
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