Svanborg Per, Andersson Miranda, Reinedahl Therese, Alstad Torgny
Department of Prosthodontics/Dental Materials Science, Institute of Odontology, the Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden.
Biomater Investig Dent. 2019 Oct 30;6(1):32-34. doi: 10.1080/26415275.2019.1684198. eCollection 2019.
The aim of this study was to compare the fit measurements from the 3 D triple-scan protocol and the impression replica technique, by measuring the fit of three-unit tooth-supported fixed dental prostheses. The results from an earlier study using the triple-scan protocol were compared to results from the impression replica technique for absolute marginal gap, cervical area gap and internal gap. There were no differences for cervical area gap or internal gap, but for absolute marginal gap the impression replica technique obtained significantly smaller fit values. The impression replica technique and the triple-scan protocol may both be used to measure the fit of tooth-supported restorations. However, the scanner used for the triple-scan protocol must be able to obtain scan points at the outermost edge of the restorations when used for absolute marginal gap.
本研究的目的是通过测量三单位牙支持固定义齿的适合度，比较三维三次扫描方案和印模复制技术的适合度测量结果。将早期使用三次扫描方案的研究结果与印模复制技术在绝对边缘间隙、颈部区域间隙和内部间隙方面的结果进行比较。颈部区域间隙或内部间隙没有差异，但对于绝对边缘间隙，印模复制技术获得的适合度值明显更小。印模复制技术和三次扫描方案均可用于测量牙支持修复体的适合度。然而，用于三次扫描方案的扫描仪在用于测量绝对边缘间隙时，必须能够在修复体的最外边缘获取扫描点。
