Denis Corentin, Robberecht Lieven, Delattre Jérôme, Deveaux Etienne, Hornez Jean-Christophe, Dehurtevent Marion
Department of Prosthodontics, Faculty of Dental Surgery, University of Lille.
INSERM U1008 - Controlled Drug Delivery Systems and Biomaterials, School of Medicine, University of Lille.
Dent Mater J. 2023 Jan 31;42(1):79-85. doi: 10.4012/dmj.2022-102. Epub 2022 Nov 8.
The purpose of the present study was to evaluate the influence of height and length variations of alumina ceramics manufactured by stereolithography on deformations caused by the manufacturing process and on the 3D shrinkage ratio to control the final dimensions and improve the adaptation of stereolithographic ceramic dental prostheses. Two different U-shaped models were designed with variable heights or lengths. The specimens were manufactured by stereolithography and were scanned using a microtomographic device before and after the heat treatment. Dimensional variations were measured using inspection software. The number and surface of layers of alumina ceramic influenced the reliability of the stereolithography manufacturing but did not influence the 3D shrinkage ratio. The larger the layer surface, the larger the deformation of the ceramic. Dental ceramics manufactured by stereolithography with smallest layer surface are the most reliable. This helps in the selection of the build orientation.
本研究的目的是评估通过立体光刻制造的氧化铝陶瓷的高度和长度变化对制造过程引起的变形以及对三维收缩率的影响，以控制最终尺寸并改善立体光刻陶瓷牙科假体的适配性。设计了两种不同高度或长度可变的U形模型。通过立体光刻制造标本，并在热处理前后使用显微断层扫描设备进行扫描。使用检测软件测量尺寸变化。氧化铝陶瓷的层数和层表面影响立体光刻制造的可靠性，但不影响三维收缩率。层表面越大，陶瓷的变形越大。通过立体光刻制造的层表面最小的牙科陶瓷最可靠。这有助于选择构建方向。
