Fracture resistance, marginal and internal adaptation of innovative 3D-printed graded structure crown using a 3D jet printing technology

IF 3.4 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry Pub Date : 2024-06-21 DOI:10.1111/jopr.13895

Amirali Zandinejad DDS, MSc, Ramtin Sadid Zadeh DDS, MS, Leila Nasiry Khanlar DDS, MSc, PhD, Abdul Basir Barmak MD, MSc, EdD, Marta Revilla-León DDS, MS, PhD

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引用次数: 0

Abstract

Purpose

This in vitro study aimed to create a graded structured dental crown using 3D printing technology and investigate the fracture resistance and the adaptation of this new design.

Materials and Methods

A dental crown with a uniform thickness of 1.5 mm was designed, and the exported stereolithography file (STL) was used to manufacture 30 crowns in three groups (n = 10), solid (SC), bilayer (BL), and multilayer (ML) crowns using 3D jet printing technology. Marginal and internal gaps were measured using the silicone replica technique. Crowns were then luted to a resin die using a temporary luting agent and the fracture resistance was measured using a universal testing machine. One-way ANOVA and Tukey post hoc tests were used to compare the fracture resistance and the adaptation of crowns at a significance level of 0.05.

Results

Mean marginal and internal gap of the ML group were 80 and 82 mm, respectively; which were significantly (p < 0.05) smaller than BL (203 and 183 mm) and SC (318 and 221 mm) groups. The SC group showed the highest mean load at fracture (2330 N) which was significantly (p < 0.05) higher than the BL (1716 N) and ML (1516 N) groups.

Conclusion

3D jet printing technology provides an opportunity to manufacture crowns in a graded structure with various mechanical properties. This study provided an example of graded structured crowns and presented their fracture resistance. SC group had the highest fracture resistance; however, ML had the best marginal and internal adaptation.

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采用三维喷射打印技术的创新型三维打印分级结构牙冠的抗断裂性、边缘和内部适应性

材料和方法设计了一个均匀厚度为 1.5 毫米的牙冠，并使用导出的立体光刻文件（STL），利用三维喷射打印技术制造了 30 个牙冠，分为三组（n = 10），即实心（SC）、双层（BL）和多层（ML）牙冠。使用硅胶复制技术测量边缘和内部间隙。然后使用临时粘接剂将牙冠粘接到树脂模具上，并使用万能试验机测量抗折性。结果ML组的平均边缘间隙和内部间隙分别为80毫米和82毫米，明显小于BL组（203毫米和183毫米）和SC组（318毫米和221毫米）（p <0.05）。SC 组显示出最高的平均折断载荷（2330 N），明显（p < 0.05）高于 BL 组（1716 N）和 ML 组（1516 N）。本研究提供了一个分级结构牙冠的实例，并介绍了它们的抗折性。SC 组具有最高的抗折性，但 ML 组的边缘和内部适应性最好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Prosthodontics-Implant Esthetic and Reconstructive Dentistry DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

7.90

自引率

15.00%

发文量

171

审稿时长

6-12 weeks

期刊介绍： The Journal of Prosthodontics promotes the advanced study and practice of prosthodontics, implant, esthetic, and reconstructive dentistry. It is the official journal of the American College of Prosthodontists, the American Dental Association-recognized voice of the Specialty of Prosthodontics. The journal publishes evidence-based original scientific articles presenting information that is relevant and useful to prosthodontists. Additionally, it publishes reports of innovative techniques, new instructional methodologies, and instructive clinical reports with an interdisciplinary flair. The journal is particularly focused on promoting the study and use of cutting-edge technology and positioning prosthodontists as the early-adopters of new technology in the dental community.