Kumar Mv Sunil, Kumar Rajesh, Saini Ravindher Singh, Vyas Rajesh, Vaddamanu Sunil Kumar
Department of Prosthodontics, Jaipur Dental College, Maharaj Vinayak Global University, Jaipur, Rajasthan, India.
Department of Allied Dental Health Sciences, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia.
J Pharm Bioallied Sci. 2024 Dec;16(Suppl 4):S3821-S3823. doi: 10.4103/jpbs.jpbs_985_24. Epub 2024 Dec 10.
Digital manufacturing techniques such as milling (subtractive) and 3D printing (additive) are increasingly used in dental restorations. These technologies promise enhanced precision and efficiency compared to traditional methods. However, the accuracy of marginal and internal fits of crowns produced by these techniques remains under-explored.
To evaluate and compare the marginal and internal fit of dental crowns fabricated using two digital manufacturing techniques: Milling (subtractive) and 3D printing (additive).
A maxillary first molar was replicated to create seven representative dies for each technique. Crowns were fabricated using both milling and 3D printing methods. The fit of the crowns was assessed using the silicone replica technique, measuring occlusal, axial, marginal gaps, and internal fit.
3D printing demonstrated the most precise fit across all measurement points, with significantly smaller discrepancies compared to milling. The two-way ANOVA analysis confirmed a significant effect of the fabrication method on marginal and internal gaps, highlighting the superior performance of 3D printing. However, the silicone replica technique revealed fewer significant differences between the two methods.
3D printing offers enhanced precision and consistency in crown fabrication compared to milling. Despite promising results, further research is necessary to confirm the long-term efficacy and cost-effectiveness of these techniques. Future studies should focus on larger clinical cohorts to validate these findings.
诸如铣削（减法制造）和3D打印（加法制造）等数字制造技术在牙齿修复中越来越常用。与传统方法相比，这些技术有望提高精度和效率。然而，这些技术所生产牙冠的边缘适合性和内部适合性的准确性仍有待探索。
评估和比较使用两种数字制造技术制造的牙冠的边缘适合性和内部适合性：铣削（减法制造）和3D打印（加法制造）。
复制一颗上颌第一磨牙，为每种技术制作七个代表性模型。使用铣削和3D打印方法制作牙冠。使用硅橡胶复制技术评估牙冠的适合性，测量咬合、轴向、边缘间隙和内部适合性。
3D打印在所有测量点上显示出最精确的适合性，与铣削相比差异显著更小。双向方差分析证实了制造方法对边缘和内部间隙有显著影响，突出了3D打印的优越性能。然而，硅橡胶复制技术显示两种方法之间的显著差异较少。
与铣削相比，3D打印在牙冠制造中提供了更高的精度和一致性。尽管结果很有前景，但仍需要进一步研究来证实这些技术的长期疗效和成本效益。未来的研究应集中在更大的临床队列上以验证这些发现。
