Aim: The goal of this prospective 1-year clinical trial was to determine how two types of finishing line (FL) designs—biologically oriented preparation technique (BOPT) and chamfer—affect the biological behavior of monolithic zirconia (M-ZrO2) crowns for anterior teeth, including their pocket depth (PD), clinical attachment level (CAL), plaque index (PI), and gingival index (GI).
Material and Methods: Eight healthy adults over the age of 18 with a normal occlusion, healthy periodontium, and normal gingival biotypes were enrolled in this clinical trial from patients who were seeking treatment for endodontically treated anterior teeth with monolithic zirconia crowns. A split-mouth design was intended for this clinical trial. The BOPT or chamfer FL designs were used to prepare a total of 16 maxillary incisor teeth that had undergone endodontic treatment—eight in each group. At three distinct follow-up intervals (baseline, 6 months, and 12 months), the PD, CAL, PI, and GI were clinically assessed using Williams' periodontal probe in accordance with explicitly developed criteria. In order to conduct a statistical analysis, the numerical results for the PD, CAL, PI, and GI tests were gathered, confirmed for normality, and statistically analyzed using the unpaired t-test (to compare two groups) and the one-way ANOVA test (to compare various time intervals). The threshold for significance was fixed at p 0.05.
Results: Regarding the biological outcomes, there were no statistically significant differences detected between the finish line configurations.
Conclusions: Zirconia crowns are produced a positive biological response, regardless of the type of finish line.