BioMedica |

Original Article

Volume: 41 | Issue: 1 | Published: Mar 25, 2025 | Pages: 06 - 06 | DOI: 10.24911/BioMedica/5-1196

Comparative analysis of various surface treatment techniques on the shear bond strength of repaired dental composite materials

Authors: Hira Asghar , Hammad Hassan , Sana Akram , Muhammad Asif Shahzad , Ayma Syed , Zenab Yasir

Article Info

Authors

Hira Asghar

Associate Professor, Science of Dental Materials, Azra Naheed Dental College, Superior University, Lahore

Hammad Hassan

Assistant Professor, Science of Dental Materials, University of Health Sciences, Lahore

ORCID

Sana Akram

Assistant Professor, Azra Naheed Dental College, Superior University, Lahore

Muhammad Asif Shahzad

Professor Oral & Maxillofacial Surgery, Azra Naheed Dental College. Superior University, Lahore

Ayma Syed

Head of Department, Community Dentistry, Azra Naheed Dental College. Superior University, Lahore

Zenab Yasir

Associate Professor, Science of Dental Materials, Akhtar Saeed Medical and Dental College, Lahore

Publication History

Received: September 07, 2024

Accepted: January 03, 2025

Published: March 25, 2025

Abstract

Background and Objective: Repairing composite restorations is a conservative alternative to replacement, and bond strength is influenced by both the composite type and surface treatment. This study compared the shear bond strength of microhybrid and bulk-fill composites repaired with bulk-fill composite using different surface treatment protocols.

Methods: This experimental study, conducted from July 2023 to February 2024, included 120 samples: 60 microhybrid composites and 60 bulk-fill composites. The samples were divided into a control group with no further treatment and an experimental group with additional surface treatments. The samples were prepared in Teflon moulds, cured, aged in deionized water, and exposed to thermal cycling as per ISO standard/TR 11405 (2003). The surface treatments included roughening, application of a universal adhesive (iBOND Universal), sandblasting with alumina, and a silane coupling agent (bis-Silane, BISCO Inc.). The repair composites were applied and cured, followed by
shear bond strength testing using a universal testing machine.

Results: Specific post-hoc comparisons revealed that control groups generally exhibited the lowest bond strengths, with varying mean values: 11.98 ± 3.83 MPa, 23.01 ± 7.46 MPa, and 12.90 ± 3.03 MPa for different controls. Conversely, specimens treated with bulk-fill material consistently showed higher shear bond strength, especially those undergoing sandblasting, which recorded the highest bond strengths among all the groups tested (p < 0.01). Additionally, the failure analysis under a stereo light microscope revealed a transition in rupture types from “adhesive interface” to “cohesive in composite” in aged specimens, after thermal cycling, indicating a reduction in the cohesive strength over time.

Conclusion: Sandblasting notably improved the repair effectiveness, emphasizing the importance of surface preparation in dental composite repairs. These findings underscore the need for careful selection of surface treatment techniques to optimize repair outcomes in dental restorations.

Keywords: Composite Resins, Dental Materials, Dental Restoration Failure, Shear Strength

Pubmed Style

Hira Asghar, Hammad Hassan, Sana Akram, Muhammad Asif Shahzad, Ayma Syed, Zenab Yasir. Comparative analysis of various surface treatment techniques on the shear bond strength of repaired dental composite materials. BioMedica. 2025; 25 (March 2025): 06-06. doi:10.24911/BioMedica/5-1196

Web Style

Hira Asghar, Hammad Hassan, Sana Akram, Muhammad Asif Shahzad, Ayma Syed, Zenab Yasir. Comparative analysis of various surface treatment techniques on the shear bond strength of repaired dental composite materials. https://biomedicapk.com/index.php/articles/1196 [Access: August 10, 2025]. doi:10.24911/BioMedica/5-1196

AMA (American Medical Association) Style

Vancouver/ICMJE Style

Hira Asghar, Hammad Hassan, Sana Akram, Muhammad Asif Shahzad, Ayma Syed, Zenab Yasir. Comparative analysis of various surface treatment techniques on the shear bond strength of repaired dental composite materials. BioMedica. (2025), [cited August 10, 2025]; 25 (March 2025): 06-06. doi:10.24911/BioMedica/5-1196

Harvard Style

Hira Asghar, Hammad Hassan, Sana Akram, Muhammad Asif Shahzad, Ayma Syed, Zenab Yasir (2025) Comparative analysis of various surface treatment techniques on the shear bond strength of repaired dental composite materials. BioMedica, 25 (March 2025): 06-06. doi:10.24911/BioMedica/5-1196

Chicago Style

Hira Asghar, Hammad Hassan, Sana Akram, Muhammad Asif Shahzad, Ayma Syed, Zenab Yasir. "Comparative analysis of various surface treatment techniques on the shear bond strength of repaired dental composite materials." 25 (2025), 06-06. doi:10.24911/BioMedica/5-1196

MLA (The Modern Language Association) Style

APA (American Psychological Association) Style

Hira Asghar, Hammad Hassan, Sana Akram, Muhammad Asif Shahzad, Ayma Syed, Zenab Yasir (2025) Comparative analysis of various surface treatment techniques on the shear bond strength of repaired dental composite materials. , 25 (March 2025), 06-06. doi:10.24911/BioMedica/5-1196