Târtea Daniel Adrian, Ionescu Mihaela, Manolea Horia Octavian, Mercuț Veronica, Obădan Eugenia, Amărăscu Marina Olimpia, Mărășescu Petre Costin, Dăguci Luminița, Popescu Sanda Mihaela
Department of Oral Rehabilitation, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania.
Department of Medical Informatics and Biostatistics, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania.
J Clin Med. 2023 Mar 8;12(6):2128. doi: 10.3390/jcm12062128.
The implementation of CAD-CAM systems in dentistry has significantly influenced the evolution of dental implantology and implant-supported prosthetics within the past three decades. Implant-supported prostheses are comfortable and aesthetic. The prosthetic abutment has also faced a rapid design evolution, from the individualization of standard stock abutments offered by various manufacturers to a modern customization process using CAD-CAM technology. This paper presents a comparative study between 20 dental custom CAD-CAM implant abutments and 20 dental implant stock abutments, based on a set of measurements performed on the digital casts obtained from 24 cases of prosthetic rehabilitation on implants. The statistical analysis (Mann-Whitney U test) revealed significant differences between these two types of abutments: the incisal margin line diameter dimensions for custom abutments were significantly improved compared to standard abutments at the cervical level (U = 343.00, z = 3.868, < 0.0005) and the incisal/occlusal level (U = 352.00, z = 4.112, < 0.0005), while the inclination angle of the custom abutments relative to the 0-axis was significantly smaller than that of standard abutments (U = 115.50, z = -2.286, = 0.022). The use of custom abutments leads to an increase in the final size of the abutment, an improvement in the retention of the prosthetic work, and reduces the angulation of the abutment in relation to the implant axis, thus decreasing the risk of unscrewing or fracturing the dental screw.
在过去三十年中，牙科CAD-CAM系统的应用对牙种植学以及种植体支持的修复学的发展产生了重大影响。种植体支持的修复体舒适且美观。修复基台也经历了快速的设计演变，从各制造商提供的标准库存基台的个性化，发展到使用CAD-CAM技术的现代定制过程。本文基于对从24例种植体修复病例获得的数字化模型进行的一系列测量，对20个牙科定制CAD-CAM种植基台和20个牙科种植库存基台进行了比较研究。统计分析（曼-惠特尼U检验）显示这两种类型的基台之间存在显著差异：定制基台的切缘线直径尺寸在颈部水平（U = 343.00，z = 3.868，< 0.0005）和切缘/咬合面水平（U = 352.00，z = 4.112，< 0.0005）与标准基台相比有显著改善，而定制基台相对于0轴的倾斜角度明显小于标准基台（U = 115.50，z = -2.286，= 0.022）。使用定制基台会使基台的最终尺寸增加，改善修复体的固位，并减少基台相对于种植体轴的角度，从而降低牙螺钉松动或断裂的风险。
