Research Article

Effect on the Fracture Resistance of Monolithic Zirconia Custom Abutment in Different Angulation: An In Vitro Study

Rajib Kumar Banik
Bangabandhu Sheikh Mujib Medical University, Bangladesh
Mahbubur Rahman
Bangabandhu Sheikh Mujib Medical University, Bangladesh
Aeysha Siddika
Sapporo Dental College, Bangladesh
Bithi Majumder
Community Based Health Care, Bangladesh
Mohammad Abid
Bangabandhu Sheikh Mujib Medical University, Bangladesh
Mozammal Hossain
Bangabandhu Sheikh Mujib Medical University, Bangladesh
* Corresponding author
DOI icon 10.24018/ejdent.2023.4.3.252

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Submitted 2023-01-30
Published 2023-06-08

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Article Main Content

The study was designed to find out the effect of different angulations of monolithic Zirconia custom-made abutments on fracture resistance. In this experimental type in vitro study, a total of thirty implant analogs with a diameter of 4.3 mm and a length of 11.5 mm were obtained for the maxillary central incisor. A total of thirty abutments specimens in three groups- 0-degree, 15-degree, and 25-degree, ten in each group were fabricated with monolithic zirconium by CAD/CAM system. Each abutment was subjected to load until fracture in a Universal testing machine and data was collected to a data collection sheet. One-way ANOVA was done to compare the fracture load among the three groups and pairwise comparison was done by Tukey post hoc test. The statistical significance p-value was considered as less than 0.05. The range of fracture load of 0-degree, 15-degree, and 25-degree angulated abutments were 590.55-1305.43N, 755.89-1720.55N, and 496.68-820.88N respectively. The highest fracture resistance was shown in 15-degree angulated custom-made zirconium abutments with a mean ± SD of 1223.442 ± 317.771N and the lowest fracture resistance was shown in case 25-degree with a mean ± SD deviation of 653.139 ± 102.045N. The mean ± SD of the 0-degree abutment was 948.944±245.588N. 95% Confidence interval of the mean were 773.260-1124.627N, 996.122-1450.761N, and 580.140-726.137N were assessed in cases of 0-degree, 15-degree, and 25-degree respectively. The fracture load or fracture resistance among the three groups of custom-made monolithic zirconium abutments were significantly different. 15-degree angulated abutment had higher fracture resistance properties. straight abutment had more fracture resistance properties than that of 25-degree abutments, but less than 25-degree abutments.

Keywords: Angulated implant abutment CAD/CAM system fracture resistance monolithic zirconia custom-made abutments

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