Effect of cement-space thickness on the marginal fitness of all zirconium oxide crowns—An in vitro study

IF 0.5 Q4 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of International Oral Health Pub Date : 2022-07-01 DOI:10.4103/JIOH.JIOH_275_21

F. Taha, Zainab Jasim, Hala Husseien

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引用次数: 0

Abstract

Aim: To estimate the influence of cement-space thickness on the vertical marginal fitness of full zirconia crowns. Materials and Methods: A total of 24 newly extracted sound human maxillary first premolars were mounted and thereafter prepared to receive fully contoured zirconia crowns. Teeth were scanned via Chairside Economical Restoration of Esthetic Ceramic (CEREC) digital intraoral scanner (Omnicam, Sirona, Germany). Afterward, teeth were randomly assorted into three groups (depending on the cement-space thickness parameter of their corresponding designed crowns): group A = 80 μm, group B = 100 μm, and group C = 120 μm. Zirconia crowns were assembled using In-Lab MCX5 milling machine (Sirona). The cementation procedure was undergone using RelyX Unicem self-adhesive luting cement (3M, ESPE, Germany). The marginal discrepancy was measured at 16 points/tooth utilizing a digital microscope (85× magnification). Data were statistically analyzed utilizing one-way analysis of variance (ANOVA) and Tukey honestly significant difference (HSD) test (P = 0.05). Results: The analysis revealed that the cement-space thickness parameter had a highly significant effect on the marginal gap values in all groups. The lowest mean of marginal gap values was noted for group C (120 μm). Conclusion: Increasing cement-space thickness from 80 μm to 100 and 120 μm might be favorable for a better adaptation of monolithic zirconia crowns.

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骨水泥间隙厚度对全氧化锆冠边缘适应度的影响——体外研究

目的:探讨骨水泥间隙厚度对全氧化锆冠垂直边缘适合度的影响。材料与方法:将24颗新拔除的健全人上颌第一前磨牙固定，然后准备接受全轮廓的氧化锆冠。牙齿通过Chairside economic Restoration of aesthetic Ceramic (CEREC)数字口内扫描仪(Omnicam, Sirona, Germany)进行扫描。然后，根据相应设计冠的骨水泥间隙厚度参数，将牙齿随机分为3组:A组= 80 μm, B组= 100 μm, C组= 120 μm。使用In-Lab MCX5铣床(Sirona)组装氧化锆冠。采用RelyX Unicem自粘胶固井水泥(3M, ESPE，德国)进行固井。利用数码显微镜(85倍放大)在16个点/牙齿处测量边缘差异。数据采用单因素方差分析(ANOVA)和诚实显著性差异检验(HSD)进行统计学分析(P = 0.05)。结果:分析显示，各组骨水泥间隙厚度参数对边缘间隙值的影响均非常显著。C组(120 μm)的边缘间隙值平均值最低。结论:将骨水泥间隙厚度从80 μm增加到100 μm和120 μm有利于整体氧化锆冠的适应性提高。

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 International Oral Health Dentistry-Dentistry (all)

CiteScore

1.00

自引率

14.30%

发文量

期刊介绍： It is a journal aimed for research, scientific facts and details covering all specialties of dentistry with a good determination for exploring and sharing the knowledge in the medical and dental fraternity. The scope is therefore huge covering almost all streams of dentistry - starting from original studies, systematic reviews, narrative reviews, very unique case reports. Our journal appreciates research articles pertaining with advancement of dentistry. Journal scope is not limited to these subjects and is more wider covering all specialities of dentistry follows: Preventive and Community Dentistry (Dental Public Health) Endodontics Oral and Maxillofacial Pathology Oral and Maxillofacial Radiology Oral and Maxillofacial Surgery (also called Oral Surgery) Orthodontics and Dentofacial Orthopaedics Periodontology (also called Periodontics) Pediatric Dentistry (also called Pedodontics) Prosthodontics (also called Prosthetic Dentistry) Oral Medicine Special Needs Dentistry (also called Special Care Dentistry) Oral Biology Forensic Odontology Geriatric Dentistry or Geriodontics Implantology Laser and Aesthetic Dentistry.