Bonding of Fractured Fragments using Various Bonding Materials as a Treatment Modality in Cases of Vertical Root Fracture- A Systematic Review

Abstract

Introduction: Vertical Root Fracture (VRF) is third most common factor leading to extraction of root canal treated tooth. It has a longitudinal orientation. This occurs due to reduction in structural integrity and dehydration of dentine. Most common treatment includes extraction of the teeth. Other modality is amputation of involved root in molars. Various materials can also be used for bonding of the fragments. Aim: To compare and evaluate the effectiveness of dentine bonding systems in re-attatchment of fractured root. Materials and Methods: The present systematic review included a comprehensive search of last 10 years was performed in the systematic electronic database PubMed. In-vitro laboratory studies that evaluated the microtensile bond strength and fracture resistance of multiple dentine adhesive systems and compared them in human and/or animal teeth in which VRF had occurred were included. A total of 16 non duplicated studies were retrieved in the systematic search. Results: Out of 16 studies four studies were included in the systematic review. One study assessed the bond strength of the adhesive using table top testing machine. Two studies assessed the microtensile bond strength using stereo microscope and one study assessed recurrence of the fracture using Instron Machine. The studies demonstrated large variability among methodology used for evaluation. In one study, acid phosphate monomer showed highest microtensile bond strength (p<0.05), and in another study Refracture (RF) occurred easily in samples bonded with Glass Ionomer Cement (GIC) as compared to those bound with Perma Bond and Gluma (p<0.0003). Conclusion: From the present study's analysis, dual cure adhesive resin cement either reinforced with polyethylene fibers or glass fibers, and glass ionomer cement may increase the fracture resistance of bonded tooth.