Akademik Veri Yönetim Sistemi
IADR CONGERESS, Barcelona, İspanya, 25 Haziran - 28 Temmuz 2025, (Özet Bildiri)
Objectives: Implant-abutment connection misfits pose a significant risk in implant rehabilitation, making their precise detection crucial for optimal clinical outcomes. This study aims to evaluate the effectiveness of periapical radiographs in detecting connection misfits and identifies the optimal irradiation angles for detection.
Methods: The connection between the implant and abutment was investigated by inserting PVC materials of varying thicknesses (50, 100, 150, 200 microns), with a control group without PVC. For each sample, 13 distinct digital radiographs were obtained at angles between 0, ±5 and ±30 with 5-degree intervals, expressed as respectively T0, ±T5-30; 65 in total. The vertical distance between the implant-abutment interface and the platform was measured and calibrated using CS Imaging Software. Each measurement was repeated seven times for each radiograph to ensure consistency and accuracy.
Results: Data were analyzed using SPSS-22, with normality assessed by the Shapiro-Wilk test. Due to non-normal distribution, the Kruskal-Wallis H test was used for thickness group comparisons, and the Wilcoxon signed-rank test for angle comparisons. At 0 PVC thickness, significant differences were observed between T20 and T25 measurements, with T25 being significantly lower. A similar result was found between (-T20) and (-T25) measurements. At 50 PVC thickness, significant differences were found between T15 and T20, with T20 lower, while no significant difference existed between (-T15) and (-T20). At higher PVC thicknesses (100, 150, and 200), significant differences were noted between various measurement pairs, consistently showing lower values for higher thickness levels.
Conclusions: The precision of X-ray-based diagnostics pertaining to the gap at the implant interface can be considerably influenced by the angular positioning of the X-ray tube in relation to the long axis of the implant. It is imperative for clinicians to recognize that variations in X-ray tube inclination may yield either accurate or misleading representations of the gap.