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Impact of Post-Curing Exposure Time on the Dimensional Fidelity of 3D-Printed Provisional Crowns: A Root Mean Square
Miruna Andreea Anghel1, Ioana Mitruț1, Mihaela Ionescu2
1Department of Dental Prosthesis Technology, Faculty of Dentistry, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania.
Background:
Dimensional stability during post-curing exposure time is critical for the clinical success of 3D-printed restorations. This study evaluates how different post-curing protocols affect the accuracy of provisional crowns.
Methods:
Fifty-four provisional crowns (n = 27 incisors; n = 27 premolars) were fabricated using an ASIGA 3D MAX UV printer. The crowns were subjected to three post-curing durations (5, 10, and 20 min). Dimensional deviation was quantified using RMS values.
Results:
RMS values showed a numerical, but not statistically significant, increase with longer post-curing times (p > 0.05). The 5 min protocol yielded the lowest descriptive deviations for both tooth types.
Conclusions:
Although no statistically significant differences were observed, shorter post-curing times were associated with lower RMS values and may help preserve dimensional accuracy. Further studies with larger subgroup sizes are needed to confirm these trends.
