González-Barnadas Albert, Ribas-Garcia Anna, Jorba-García Adrià, Figueiredo Rui, Valmaseda-Castellón Eduard, Camps-Font Octavi
Department of Dentistry, Faculty of Medicine and Health Sciences, Universitat de Barcelona, 08907 Barcelona, Spain.
Dental and Maxillofacial Pathology and Therapeutics Research Group, IDIBELL Research Institute, 08908 Barcelona, Spain.
J Funct Biomater. 2025 Aug 2;16(8):284. doi: 10.3390/jfb16080284.
The aim of this study was to evaluate the impact of autoclaving on the dimensional stability of surgical guides (SGs) for aesthetic crown lengthening (ACL) using different resins/printing methods. Fifty SGs for ACL were printed using five different resin/printer combinations (FL, SR, ND, KS and VC). All the SGs were scanned before (T0) and after (T1) sterilization. Autoclaving was conducted at 134 °C during 4 min. The STL files of each SG at T0 and T1 were compared with the original design (TR). Dimensional stability was measured using trueness and precision. Deviations from TR to T1 were calculated in the three space axes and by measuring the area between three reference landmarks. At T0, the FL group showed the best trueness and precision, while the SR group performed significantly worse than the other groups. At T1, all the groups except VC exhibited significant dimensional alterations compared with T0. Also, VC showed the best trueness and precision values. All the groups had a significant deviation in at least one space axis, while only the SR group exhibited significant variations from T1 to TR in the area between the reference landmarks. Most of the evaluated resin/3D printer combinations suffered significant dimensional alterations after autoclaving.
本研究的目的是评估高压灭菌对使用不同树脂/打印方法制作的美学牙冠延长术（ACL）手术导板（SGs）尺寸稳定性的影响。使用五种不同的树脂/打印机组合（FL、SR、ND、KS和VC）打印了50个用于ACL的SGs。所有SGs在灭菌前（T0）和灭菌后（T1）均进行了扫描。在134°C下进行4分钟的高压灭菌。将每个SG在T0和T1时的STL文件与原始设计（TR）进行比较。使用准确性和精确性来测量尺寸稳定性。计算从TR到T1在三个空间轴上的偏差，并通过测量三个参考标志之间的面积来计算偏差。在T0时，FL组显示出最佳的准确性和精确性，而SR组的表现明显比其他组差。在T1时，与T0相比，除VC组外的所有组均表现出明显的尺寸变化。此外，VC组显示出最佳的准确性和精确性值。所有组在至少一个空间轴上都有明显偏差，而只有SR组在参考标志之间的面积上从T1到TR表现出明显变化。大多数评估的树脂/3D打印机组合在高压灭菌后都出现了明显的尺寸变化。
