Reinforcement of Simulated Immature Permanent Teeth after Mineral Trioxide Aggregate Apexification

Abstract

Within the limit of this study, after MTA apexification, intraradicular reinforcement with MTA, fiber post, or composite resin increased the fracture resistance of simulated immature teeth.

Fatigue failure load of immature anterior teeth: influence of different fiber post-core systems

“…Nowadays the concept of intraradicular reinforcement of immature teeth after one-shot apexification has got increased attention [11]. In our study, various fiber-reinforced composite materials were used with the aim of reinforcing immature teeth.…”

“…This method represents an attempt to strike a balance between the load-to-fracture test and the more sophisticated and time-consuming fatigue tests [25]. Similar to other in vitro mechanical studies, the 135° loading angle was used to simulate load applied to the lingual area of an upper anterior tooth [7,11,26]. While Group 2 did not differ in survival from the intact teeth (control group), all other groups showed significantly lower survival rates compared to intact teeth.…”

“…The reinforcing effect of FRC posts in immature teeth is a matter of ongoing debate. According to Jamshidi et al, and Linsuwanont et al FRC posts cannot reinforce an immature tooth as the fracture resistance after post insertion is significantly lower compared to intact teeth [8,11]. In contrast, in the study of Schmoldt et al immature teeth restored with FRC post showed higher fracture resistance compared to intact teeth [7].…”

“…Elnaghy et al emphasized that the high frequency of cervical root fractures in immature teeth is predominantly due to fatigue crack growth over time, not secondary to trauma [10]. Thus, the fate of immature teeth after MTA apexification is determined partly by the integrity of the remaining tooth structure and partly by the permanent restoration to keep it in function [11]. However, traditional post insertion requires the usage of post drills, which hold the possibility of further weakening the root by removing dentine.…”

Endodontic Perforation Closure by Five Mineral Oxides Silicate-Based Cement with/without Collagen Sponge Matrix

“…MTA is an effective material in sealing of lateral and furcation perforations [7,8], and it can be applied using both immediate and mediate techniques [9]. Furthermore, it is indicated for apexogenesis, apexification, and revascularization of vital and nonvital immature teeth [10][11][12]. Later, several bioceramic (silicate-based) cements of the same chemical formula were released [13,14].…”