ArticleThe journal of advanced prosthodontics2026
Influence of repeated milling bur use on the marginal adaptation of monolithic zirconia crowns.
Article in The journal of advanced prosthodontics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeThis MATERIALS AND
methodsFifty-six monolithic zirconia crowns were manufactured utilizing a dry milling protocol. Milling was continued without bur replacement, and production proceeded with the same bur set even after the system issued a bur replacement warning after the 27th restoration. These restorations were then allocated into four distinct groups (n = 14 per group) based on the milling sequence. Marginal gap measurements were performed with a stereomicroscope, and measurements were obtained from the four surfaces of each crown. To evaluate statistical significance among the groups, a Welch analysis of variance (ANOVA) was conducted, followed by Games-Howell procedures for post hoc pairwise comparisons.
resultsSignificant variations in vertical marginal adaptation were detected among the tested cohorts (F = 68.5,
conclusionAs the milling bur usage cycle increased, the marginal gap increased; however, the difference in marginal discrepancy between the later production groups (Group 3 and Group 4) was no longer statistically significant.
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