摘要
背景：在数字牙科中，实现全弓种植支持修复体的被动且精确就位仍是一项重大挑战。口内扫描体（ISB）是数字化转移种植体位置的关键组件。然而，ISB的材料、几何形状和高度差异可能会影响口内扫描的准确性和精密度。本研究旨在评估不同ISB设计对无牙上颌多颗种植体情况下数字印模的真度（Trueness）和精密度（Precision）的影响。
方法：使用Primescan口内扫描仪对包含8颗种植体的体外模型进行扫描。测试了五种ISB配置：四种来自不同制造商（ELOS、GT Medical、ZIACOM和3Shape），以及第五种交替使用ISB的混合组。以坐标测量机（CMM）作为参考标准。通过线性（欧几里得距离）和角度（相对倾斜角）测量评估准确性。统计分析包括方差分析（ANOVA）、成对分析和多元回归。
结果：不同ISB在真度和精密度方面均存在显著差异。ZIACOM整体精密度最佳，特别是在重复线性测量（21 ± 16 μm）和角度测量（0.102± 0.081度）中表现突出，而ELOS在线性距离偏差最小（40 ± 33 μm）。混合ISB组产生了最高的变异性和最极端的误差。尽管平均值在临床可接受范围内，但最大偏差达到223 µm和1.2°，可能损害被动就位。
结论：在全弓种植场景中，ISB的选择显著影响口内扫描的准确性和可重复性。建议使用一致的ISB系统，因为混合不同制造商的组件可能会增加变异性并损害复杂修复中数字印模的可靠性。
原文摘要
BACKGROUND: Achieving a passive and accurate fit in full-arch implant-supported prostheses remains a significant challenge in digital dentistry. Intraoral scan bodies (ISBs) are essential components for transferring implant positions digitally. However, variations in ISB material, geometry, and height may influence the accuracy and precision of intraoral scans. This study aimed to evaluate how different ISB designs affect the trueness and precision of digital impressions in a completely edentulous maxillary arch with multiple implants.
METHODS: An in vitro model with 8 implants was scanned using the Primescan intraoral scanner. Five ISB configurations were tested: four from different manufacturers (ELOS, GT Medical, ZIACOM, and 3Shape) and a fifth mixed group with alternating ISBs. A coordinate measuring machine (CMM) was used as the reference standard. Accuracy was assessed through linear (Euclidean distance) and angular (relative angulation) measurements. Statistical comparisons included ANOVA, pairwise analysis, and multivariate regression.
RESULTS: Significant differences were found among ISBs in both trueness and precision. ZIACOM showed the best precision overall, particularly in repeated linear (21 ± 16 μm) and angular measurements (0.102± 0.081 degrees), while ELOS displayed the lowest deviation in linear distance (40 ± 33 μm). The mixed ISB group yielded the highest variability and the most extreme errors. Although mean values were within clinically acceptable limits, maximum deviations reached 223 µm and 1.2°, potentially compromising passive fit.
CONCLUSIONS: ISB selection significantly affects the accuracy and reproducibility of intraoral scans in full-arch implant scenarios. Using a consistent ISB system is recommended, as mixing components from different manufacturers may increase variability and compromise the reliability of digital impressions in complex rehabilitations.
出处
International dental journal 2026;76(5):109767. DOI: 10.1016/j.identj.2026.109767.
本页仅收录摘要与出处，不存储全文（合规要求）。