DOI: 10.69601/meandrosmdj.1789538 ISSN: 2149-9063

The Effect of Implant Angle and Ti-Base Abutment Height on Monolithic Zirconia Crown Retention

Ceren Kendirli, Hamiyet Güngör, Mehmet Ali Kılıçarslan, Lale Karaağaçlıoğlu
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ObjectiveThis study aimed to investigate the effect of using different ti-base heights on retention in implants placed at 0 degrees and 15 degrees. Material and methods Implant analogs were placed in acrylic blocks at two different angles: 0 degrees and 15 degrees. A total of 60 monolithic zirconia crown specimens were produced, with 15 specimens in each group for 30 specimens with a 5.5 mm ti-base support and 30 specimens with a 3.5 mm ti-base support. After the specimens were cemented to the ti-base supports, they were placed in a universal testing machine for a pull-out test. The maximum force used during cementation failure was recorded in newtons (N). Statistical analysis was performed using Welch's ANOVA test to test for a statistically significant difference in Maximum Load (N) between the four different groups, and the Tamhane T2 post-hoc test analysis was used since variance homogeneity was not achieved. Results There was no statistically significant difference between the straight and angled configurations in the abutment groups with a 3.5 mm Ti-base length (p > 0.05). Apart from the comparison of these two groups, the retention force showed a significant difference between the other group pairs. Conclusions In monolithic zirconia restorations supported by Ti-base abutments used with angled or straight implants, groups with longer Ti-base abutment lengths significantly affected crown retention, while groups with shorter Ti-base abutment lengths did not contribute to crown retention. Considering the prosthetic field, selecting the longest Ti-base support height may minimize the risk of restoration dislodgement.

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