Cumhur Korkmaz
Gulhane military medical academy, Turkey
Title: Marginal fit comparison of hip (hot isotatic pressed) zirconia copings fabricated with three different marginal finish lines
Biography
Biography: Cumhur Korkmaz
Abstract
Objective: The purpose of this in-vitro study was to compare the marginal fit of hot isostatic pressed (HIP) zirconia copings fabricated 3 different marginal finish lines.
Material & Methods: To simulate prepared teeth, 30 stainless steel core specimens were fabricated via CNC machining. Stainless steel specimens, which are 6 mm crown length, 1,2 mm finish lines width and 60-degree axial wall inclination angle, were prepared for comparison. These specimens were prepared and separated 3 different marginal finish lines as shoulder finish line (SHO), chamfer finish line (CHA), bevel finish line (BEV). 30 HIP (hot isostatic pressed) zirconia copings with 3 different finish lines configuration
were fabricated with DCS Precident CAD-CAM System to fit onto stainless steel core specimens.
Results: Marginal gap measurements were performed using a stereomicroscope with x150 magnification. Obtained data were analyzed with the SPSS 15.0 statistical software program. Kruskal-Wallis test was used to comparison of multiple groups. The average marginal gap values were obtained as follows, respectively: Group SHO/HIP (35.8±13.5μm) < Group CHA/HIP (44.3±13.3μm) < Group BEV/HIP (55.7±27.6μm). Statistically significant difference was found between groups with different finish line (p<0.001).
Conclusion: The amount of marginal gap at hot isostatic pressed (HIP) zirconium frameworks has been affected by different finish line.