采用纳米粒子喷射技术制作的整体氧化锆冠的尺寸精度和临床适应性。

IF 4.3 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of Prosthetic Dentistry Pub Date : 2024-11-01 DOI:10.1016/j.prosdent.2023.04.008

Jizhe Lyu BS , Xu Yang DDS, PhD , Yi Li BS , Jianguo Tan DDS, PhD , Xiaoqiang Liu DDS, PhD

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引用次数: 0

摘要

问题陈述：纳米粒子喷射（NPJ）技术是最近开发的一种增材制造方法，可能会在牙科领域得到有用的应用。目的：本体外研究的目的是比较用 NPJ 和用减法制造（SM）和数字光处理（DLP）制造的氧化锆整体冠的尺寸精度和临床适应性：采用全数字化工作流程，使用 SM、DLP 和 NPJ（n=10）制作了 30 个氧化锆整体冠。通过叠加扫描数据和计算机辅助设计数据，确定了牙冠外部、凹面和边缘区域的尺寸精度（10 个）。使用无损硅胶复型和双重扫描方法对咬合、轴向和边缘适应性进行了评估。评估三维差异以确定临床适应性。对于正态分布数据，使用 MANOVA 和事后最小显著性差异检验分析测试组间的差异；对于非正态分布数据，使用 Kruskal-Wallis 检验并进行 Bonferroni 校正（α=.05）：结果：各组在尺寸精度和临床适应性方面存在明显差异（PC结论：单片氧化锆牙的尺寸精度和临床适应性均优于单片氧化锆牙）：与使用 SM 或 DLP 制作的冠相比，使用 NPJ 制作的单片氧化锆冠具有更高的尺寸精度和临床适应性。

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Dimensional accuracy and clinical adaptation of monolithic zirconia crowns fabricated with the nanoparticle jetting technique

Statement of problem

The nanoparticle jetting (NPJ) technique is a recently developed additive manufacturing method that may have useful dental applications. The manufacturing accuracy and clinical adaptation of zirconia monolithic crowns fabricated with NPJ are unknown.

Purpose

The purpose of this in vitro study was to compare the dimensional accuracy and clinical adaptation of zirconia crowns fabricated with NPJ and those fabricated with subtractive manufacturing (SM) and digital light processing (DLP).

Material and methods

Five standardized typodont right mandibular first molars were prepared for ceramic complete crowns, and 30 zirconia monolithic crowns were fabricated using SM, DLP, and NPJ (n=10) with a completely digital workflow. The dimensional accuracy at the external, intaglio, and marginal areas was determined by superimposing the scanned data and computer-aided design data of the crowns (n=10). Occlusal, axial, and marginal adaptations were evaluated by using a nondestructive silicone replica and dual scanning method. The 3-dimensional discrepancy was evaluated to determine clinical adaptation. Differences among test groups were analyzed by using a MANOVA and the post hoc least significant difference test for normally distributed data or the Kruskal-Wallis test with Bonferroni correction for nonnormally distributed data (α=.05).

Results

Significant differences were found in the dimensional accuracy and clinical adaptation among the groups (P<.001). The NPJ group had a lower overall root mean square (RMS) value for dimensional accuracy (22.9 ±1.4 μm) than the SM (27.3 ±5.0 μm) and DLP (36.4 ±5.9 μm) groups (P<.001). The NPJ group had a lower external RMS value (23.0 ±3.0 μm) than the SM group (28.9 ±5.4 μm) (P<.001) and equivalent marginal and intaglio RMS values than the SM group. The DLP group had larger external (33.3 ±4.3 μm), intaglio (36.1 ±10.7 μm), and marginal (79.4 ±12.9 μm) deviations than the NPJ and SM groups (P<.001). With regard to clinical adaptation, the marginal discrepancy was smaller in the NPJ group (63.9 ±27.3 μm) than in the SM group (70.8 ±27.5 μm) (P<.001). No significant differences were found between the SM and NPJ groups in terms of the occlusal (87.2 ±25.5 and 80.5 ±24.2 μm, respectively) and axial (39.1 ±19.7 and 38.4 ±13.7 μm, respectively) discrepancies. The DLP group had larger occlusal (239.0 ±60.1 μm), axial (84.9 ±29.1 μm), and marginal (140.4 ±84.3 μm) discrepancies than the NPJ and SM groups (P<.001).

Conclusions

Monolithic zirconia crowns fabricated using NPJ have higher dimensional accuracy and clinical adaptation than those fabricated using SM or DLP.

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来源期刊

Journal of Prosthetic Dentistry 医学-牙科与口腔外科

CiteScore

7.00

自引率

13.00%

发文量

599

审稿时长

69 days

期刊介绍： The Journal of Prosthetic Dentistry is the leading professional journal devoted exclusively to prosthetic and restorative dentistry. The Journal is the official publication for 24 leading U.S. international prosthodontic organizations. The monthly publication features timely, original peer-reviewed articles on the newest techniques, dental materials, and research findings. The Journal serves prosthodontists and dentists in advanced practice, and features color photos that illustrate many step-by-step procedures. The Journal of Prosthetic Dentistry is included in Index Medicus and CINAHL.