Influence of preparation design and build orientation on the accuracy of ceramic-filled composite veneers printed using Tilted Stereolithography technology. An in vitro study

IF 4.8 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of dentistry Pub Date : 2025-06-06 DOI:10.1016/j.jdent.2025.105875

Reham B Osman , Nawal M. Alharbi

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引用次数: 0

Abstract

Objectives

To evaluate the influence of preparation design, build orientation and interaction between these two factors on the accuracy of veneers 3D printed using tilted stereolithography technology (TSLA).

Methods

Three maxillary central incisor typodont models were prepared to receive a full veneer preparation with three finish line designs: Cl I; labial reduction, Cl II; labial with butt joint incisal reduction and Cl III; labial and incisal overlap design then digitized to design the restorations which were 3D-printed using ceramic filled composite material (Dfab; DWS)(IrixMax monochrome A2; DWS)(N = 90). In each group, three subgroups were defined based on the build orientation (N = 10): 90°, 75° and 45° angles. Accuracy was evaluated using metrology software. Two-way Analysis of Variance (ANOVA) test was used to detect the differences between the groups (α=0.05).

Results

Two-way ANOVA revealed a statistically significant interaction between different build angles and preparation design on RMSE trueness values (P = .003) and RMSE precision values (P = .001) Tukey post hoc test revealed that Cl II design had significantly lower RMSE values compared to both Cl I and Cl III designs (P<.001). 45° angle revealed significantly higher RMSE values compared to 75° and 90° build angles with P values .017 and .009 respectively.

Conclusions

Both preparation design and build orientation have an influence on the accuracy of TSLA printed laminate veneers. Butt-joint preparation design exhibited highest trueness compared to both window and incisal wrap designs. Among all finish line designs, 45° build angle exhibited the most significant deviation values and is not recommended for printing veneers using TSLA technology.

Clinical Significance

The preparation design that best fits a given clinical situation should be selected. The print angle that yields the highest accuracy relative to the clinically selected and executed tooth preparation design should be chosen. With different veneer preparation designs, 45° build angle provides the highest deviation values with chairside TSLA printers and should be avoided when printing resin-based, monochromatic laminate veneers.

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制备设计和构建方向对倾斜立体光刻技术印刷陶瓷填充复合材料贴面精度的影响。一项体外研究。

目的：评价制备设计、构建取向以及两者之间的相互作用对倾斜立体光刻技术（TSLA）单板3D打印精度的影响。方法：制备3个上颌中切牙类型模型，采用三种终点线设计：Cl I；唇缩，clii；唇部与对接切口复位及cliii；然后将唇部和切部重叠设计数字化，以设计3d打印的修复体，使用陶瓷填充复合材料(Dfab；DWS)(IrixMax单色A2；DWS) (N = 90)。在每组中，根据构建方向（N =10）定义三个亚组：90°，75°和45°角。使用计量软件对准确度进行评价。采用双因素方差分析（ANOVA）检验检测组间差异（α=0.05）。结果：双因素方差分析显示，不同构建角度和制备设计对RMSE真实值（P = .003）和RMSE精度值（P = .001）的交互作用具有统计学意义。Tukey事后检验显示，Cl II设计的RMSE值显著低于Cl I和Cl III设计(P结论：制备设计和构建方向都影响TSLA印刷层压贴面的准确性。与窗口和切口包裹设计相比，对接准备设计的准确率最高。在所有终点线设计中，45°的建造角度显示出最显著的偏差值，不建议使用TSLA技术打印贴面。临床意义：应选择最适合临床情况的制剂设计。应该选择相对于临床选择和执行的牙齿准备设计产生最高精度的打印角度。对于不同的贴面制备设计，45°的构建角度提供了椅子边TSLA打印机的最高偏差值，在打印树脂基单色层压板贴面时应避免。

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来源期刊

Journal of dentistry 医学-牙科与口腔外科

CiteScore

7.30

自引率

11.40%

发文量

349

审稿时长

35 days

期刊介绍： The Journal of Dentistry has an open access mirror journal The Journal of Dentistry: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The Journal of Dentistry is the leading international dental journal within the field of Restorative Dentistry. Placing an emphasis on publishing novel and high-quality research papers, the Journal aims to influence the practice of dentistry at clinician, research, industry and policy-maker level on an international basis. Topics covered include the management of dental disease, periodontology, endodontology, operative dentistry, fixed and removable prosthodontics, dental biomaterials science, long-term clinical trials including epidemiology and oral health, technology transfer of new scientific instrumentation or procedures, as well as clinically relevant oral biology and translational research. The Journal of Dentistry will publish original scientific research papers including short communications. It is also interested in publishing review articles and leaders in themed areas which will be linked to new scientific research. Conference proceedings are also welcome and expressions of interest should be communicated to the Editor.