Wulff Johann, Rauch Angelika, Schmidt Michael Benno, Rosentritt Martin
Department of Prosthetic Dentistry, UKR University Hospital Regensburg, 93042 Regensburg, Germany.
Materials (Basel). 2024 Feb 28;17(5):1112. doi: 10.3390/ma17051112.
One therapeutical alternative in the treatment of functional disorders is the use of printed oral splints. The mechanical properties of these materials are highly essential to their clinical effectiveness, and their performance may vary depending on factors such as cleaning, post-polymerization, or their orientation during construction. The objective of this in vitro investigation is to evaluate the effectiveness of the selected materials in terms of their biaxial flexural strength in relation to the criteria listed above. Splint materials were used in the printing of 720 discs. The printing process was carried out in different orientations in relation to the building platform. Either an automatic or manual cleaning process was performed on the samples. For post-polymerization, either an LED or Xenon light was utilized. A piston-on-three-ball test was used to measure the biaxial flexural strength (BFS) of the materials after they were stored in water for either 24 h or 60 days. The homogeneity of the data was controlled by employing the Levene method, and the differences between the groups were analyzed using the ANOVA and Bonferroni methods. After being stored for twenty-four hours, the mean BFS ranged anywhere from 79 MPa to 157 MPa. Following a period of sixty hours, the BFS exhibited a substantial drop and revealed values that ranged from 72 to 127 MPa. There was no significant difference that could be identified between the materials or between the various cleaning processes. The results of post-polymerization showed that the LED light produced higher means than the Xenon light did. In terms of position, the mean values varied greatly, with 0°'s mean value being 101 MPa, 45°'s mean value being 102 MPa, and 90°'s mean value being 115 MPa. The use of a build orientation of 90° and post-polymerization with LED light resulted in significantly increased biaxial flexural strength. According to this study, this design should be implemented in order to ensure that splint materials have the highest possible strength.
治疗功能紊乱的一种治疗选择是使用打印的口腔夹板。这些材料的机械性能对其临床效果至关重要，其性能可能会因清洁、聚合后处理或制作过程中的取向等因素而有所不同。这项体外研究的目的是根据所选材料相对于上述标准的双轴弯曲强度来评估其有效性。夹板材料用于打印720个圆盘。打印过程相对于构建平台以不同取向进行。对样品进行自动或手动清洁处理。对于聚合后处理，使用LED灯或氙灯。在材料在水中储存24小时或60天后，使用活塞-三球试验测量材料的双轴弯曲强度（BFS）。采用Levene方法控制数据的同质性，并使用方差分析和Bonferroni方法分析组间差异。储存24小时后，平均BFS范围为79MPa至157MPa。在60小时的时间段后，BFS出现大幅下降，显示的值范围为72至127MPa。材料之间或各种清洁过程之间没有可识别的显著差异。聚合后处理的结果表明，LED灯产生的平均值高于氙灯。在位置方面，平均值差异很大，0°的平均值为101MPa，45°的平均值为102MPa，90°的平均值为115MPa。使用90°的构建取向和LED灯进行聚合后处理导致双轴弯曲强度显著增加。根据这项研究，应实施这种设计以确保夹板材料具有尽可能高的强度。
