Evaluation of the shear bond strength of surface-treated cobalt-chromium metal crowns on Corticobasal® implant abutments cemented using different luting agents.

IF 2.2 3区医学 Q2 Dentistry Journal of Stomatology Oral and Maxillofacial Surgery Pub Date : 2024-12-24 DOI:10.1016/j.jormas.2024.102208

Vinitha Ashok Kumar, Hariharan Ramakrishnan, Jayakrishnakumar Sampathkumar, Shivakumar Baskaran, Deepavalli Arumuganainar

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Abstract

Purpose: This in-vitro study aimed to compare the shear bond strength (SBS) of cobalt-chromium (Co-Cr) crowns on Corticobasal® implant abutments, evaluating the effects of two surface treatments and two luting agents.

Materials and methods: Thirty Co-Cr crowns were fabricated using CAD-CAM technology with a direct metal laser sintering process and divided into three groups based on surface treatment: Group I (untreated), Group II (sandblasted with 50 μm Al₂O₃), and Group III (Er: YAG laser etching). Each group was further subdivided based on luting cement: Sub group A (GC Fuji Plus) and Sub group B (Rely X U200). This resulted in a total of six groups. The implants were stabilized in auto-polymerizing acrylic resin, and cementation followed standardized protocols. Thermocycling with 1000 cycles (5 °C-55 °C) simulated oral conditions. SBS was tested using a universal testing machine at a crosshead speed of 1 mm/min. Failure patterns were analyzed using stereomicroscopy to classify adhesive, cohesive, and mixed failures. Statistical analysis was performed using one-way ANOVA and Bonferroni post-hoc tests (p < 0.05).

Results: Group IIIA (laser-treated, GC Fuji Plus) showed the highest SBS (243.15 MPa), followed by Group IIA (sandblasted + GC Fuji Plus), at 231.81 MPa. The lowest SBS was observed in Group IB (untreated, Rely X U200) at 124.24 MPa. Both sandblasting and laser treatment significantly enhanced SBS, with GC Fuji Plus consistently outperforming Rely X U200. A significant difference of 48.17 MPa was observed between laser-treated Groups IIIA and IIIB (p < 0.01).

Conclusion: Laser etching and GC Fuji Plus cementation provided the highest SBS for Co-Cr crowns on Corticobasal® implants. Sandblasting was a secondary effective treatment, while untreated crowns exhibited the weakest bond strength.

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不同粘结剂对皮质基基®种植体基台表面处理钴铬金属冠剪切粘结强度的评价

目的：本体外研究旨在比较皮质基基®种植基面上钴铬（Co-Cr）冠的剪切结合强度（SBS），评估两种表面处理和两种粘结剂的效果。材料和方法：采用CAD-CAM技术采用直接金属激光烧结工艺制备了30个Co-Cr冠，并根据表面处理分为三组：I组（未经处理），II组（用50 μm Al₂O₃喷砂）和III组（Er: YAG激光蚀刻）。每组在骨水泥基础上进一步细分：A亚组（GC Fuji Plus）和B亚组（Rely X U200）。结果共分为六组。植入物在自聚合丙烯酸树脂中稳定，胶结遵循标准化方案。热循环1000次（5°C-55°C）模拟口腔状况。SBS试验采用万能试验机，十字速度为1 mm/min。使用体视显微镜对失效模式进行了分析，以区分粘接、内聚和混合失效。统计学分析采用单因素方差分析和Bonferroni事后检验（p < 0.05）。结果：IIIA组（激光处理，GC Fuji Plus）的SBS最高（243.15 MPa），其次是IIA组（喷砂 + GC Fuji Plus），为231.81 MPa。在124.24 MPa时，IB组（未治疗，Rely X U200）的SBS最低。喷砂和激光处理都显著提高了SBS， GC富士Plus的表现一直优于Rely X U200。激光治疗IIIA组与IIIB组比较，差异有统计学意义（p < 0.01）。结论：激光蚀刻和GC Fuji Plus固接对皮质基底®种植体的Co-Cr冠具有最高的SBS。喷砂处理是次有效处理，而未处理冠的粘结强度最弱。

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来源期刊

Journal of Stomatology Oral and Maxillofacial Surgery Dentistry-Oral Surgery

CiteScore

2.20

自引率

9.10%

发文量

305

期刊介绍： J Stomatol Oral Maxillofac Surg publishes research papers and techniques - (guest) editorials, original articles, reviews, technical notes, case reports, images, letters to the editor, guidelines - dedicated to enhancing surgical expertise in all fields relevant to oral and maxillofacial surgery: from plastic and reconstructive surgery of the face, oral surgery and medicine, … to dentofacial and maxillofacial orthopedics. Original articles include clinical or laboratory investigations and clinical or equipment reports. Reviews include narrative reviews, systematic reviews and meta-analyses. All manuscripts submitted to the journal are subjected to peer review by international experts, and must: Be written in excellent English, clear and easy to understand, precise and concise; Bring new, interesting, valid information - and improve clinical care or guide future research; Be solely the work of the author(s) stated; Not have been previously published elsewhere and not be under consideration by another journal; Be in accordance with the journal''s Guide for Authors'' instructions: manuscripts that fail to comply with these rules may be returned to the authors without being reviewed. Under no circumstances does the journal guarantee publication before the editorial board makes its final decision. The journal is indexed in the main international databases and is accessible worldwide through the ScienceDirect and ClinicalKey Platforms.