Abstract：
UNASSIGNED: Impression making is one such important clinical step, which is critical in the accurate fitting of resulting prostheses. Impression making itself depends on the type of material and the impression technique used to record the details. Various combinations of material and the technique have been described in the literature.
UNASSIGNED: To evaluate the effect of three different impression techniques on the marginal fit of computer-aided designed/computer-aided manufactured (CAD/CAM) single unit composite fixed dental prostheses (FDP), different consistencies of addition silicone impression material and different tray design were utilized.
UNASSIGNED: Impression of prepared tooth on typodont was made using Matrix impression system, two-step putty wash technique, and individual tooth tray technique. Prosthesis was fabricated using CAD/CAM technology and marginal accuracy was evaluated using scanning electron microscopy (SEM).
UNASSIGNED: In the present study, the matrix impression system resulted in less microgap in both mid-buccal and mid-mesial region, whereas putty wash technique showed very high standard deviation in the interproximal region.
UNASSIGNED: Matrix impression system had the best results at both mid-buccal and mid-mesial position with least marginal discrepancy.
UNASSIGNED: The findings of this study could be used by clinicians to help them choose the viscosity of polyvinylsiloxane material and impression techniques for FDP that will result in high-accuracy impressions and well-fitting prostheses.
UNASSIGNED: To evaluate the effect of three different impression techniques on the marginal fit of computer-aided designed/computer-aided manufactured (CAD/CAM) single unit composite fixed dental prostheses (FDP), different consistencies of addition silicone impression material and different tray design were utilized.
UNASSIGNED: Impression of prepared tooth on typodont was made using Matrix impression system, two-step putty wash technique, and individual tooth tray technique. Prosthesis was fabricated using CAD/CAM technology and marginal accuracy was evaluated using scanning electron microscopy (SEM).
UNASSIGNED: In the present study, the matrix impression system resulted in less microgap in both mid-buccal and mid-mesial region, whereas putty wash technique showed very high standard deviation in the interproximal region.
UNASSIGNED: Matrix impression system had the best results at both mid-buccal and mid-mesial position with least marginal discrepancy.
UNASSIGNED: The findings of this study could be used by clinicians to help them choose the viscosity of polyvinylsiloxane material and impression techniques for FDP that will result in high-accuracy impressions and well-fitting prostheses.
摘要：
■印模制作是如此重要的临床步骤之一，这对于所产生的假体的准确装配至关重要。印象制作本身取决于材料的类型和用于记录细节的印象技术。在文献中已经描述了材料和技术的各种组合。
■评估三种不同的印模技术对计算机辅助设计/计算机辅助制造（CAD/CAM）单单元复合固定假牙（FDP）的边缘配合的影响，使用了不同的添加硅胶印模材料和不同的托盘设计。
■使用矩阵印模系统制作了typodont上准备好的牙齿的印模，两步洗腻子技术，和个人牙托技术。使用CAD/CAM技术制造假体，并使用扫描电子显微镜（SEM）评估边际精度。
■在本研究中，矩阵印模系统导致中颊区和中颊区的微间隙减少，而腻子清洗技术在邻间区域显示出非常高的标准偏差。
■矩阵印模系统在中颊和中腹部位置均具有最佳效果，并且边缘差异最小。
■这项研究的结果可以被临床医生用来帮助他们选择聚乙烯硅氧烷材料的粘度和FDP的印模技术，这将导致高精度的印模和合适的假体。
■评估三种不同的印模技术对计算机辅助设计/计算机辅助制造（CAD/CAM）单单元复合固定假牙（FDP）的边缘配合的影响，使用了不同的添加硅胶印模材料和不同的托盘设计。
■使用矩阵印模系统制作了typodont上准备好的牙齿的印模，两步洗腻子技术，和个人牙托技术。使用CAD/CAM技术制造假体，并使用扫描电子显微镜（SEM）评估边际精度。
■在本研究中，矩阵印模系统导致中颊区和中颊区的微间隙减少，而腻子清洗技术在邻间区域显示出非常高的标准偏差。
■矩阵印模系统在中颊和中腹部位置均具有最佳效果，并且边缘差异最小。
■这项研究的结果可以被临床医生用来帮助他们选择聚乙烯硅氧烷材料的粘度和FDP的印模技术，这将导致高精度的印模和合适的假体。
