No abstract

Aims and objectives:The fiber post type used in restoring endodontically treated teeth may affect the dental expert decision in the case of dental malpractice. The aim of this study was to evaluate the low-cost commercial fiber post in comparison with a higher cost or well-known documented fiber post system. Materials and methods:A total of 20 premolars were selected for the study; following endodontic treatment, specimens were randomly divided into two groups of 10 specimens each according to the type of fiber post used: (1) Low-cost commercial fiber post (OYAPost, Taper Lucent, OYARICOM) and (2) higher cost well-known fiber post (Rely X Fiber post, 3M ESPE). Both fiber posts were cemented using self-adhesive cement (Rely X Unicem). Samples were subjected to push-out bond strength and to failure analysis. One-way analysis of variance was used (p < 0.005). Results:There was no significant difference between the bond strength of the two tested groups (p > 0.05), while statistically significant difference (p < 0.05) was noted between the different post space regions (cervical, middle, and apical).

Medication-related osteonecrosis of the jaw (MRONJ) is a serious side effect of bisphosphonates, denosumab, and antiangiogenic drugs. Although the literature is rich with research work discussing MRONJ, the pathogenesis of this devastating condition has not been adequately understood yet. Roles of infection, immunity and genetic predisposition have been extremely unclear. Moreover, many controversies have been governing risk assessment and management guidelines. In 2003, 36 cases of osteonecrosis of the jaw (ONJ) associated with the use of either pamidronate or zoledronate were reported. Furthermore, in 2014, the American Association of Oral and Maxillofacial Surgeons (AAOMS) suggested the term “medication-related osteonecrosis of the jaw” (MRONJ) to describe jaw osteonecrosis related to the use of medications. This review sheds the light on recent research work discussing the pathogenesis of MRONJ. Moreover, it suggests possible guidelines for risk assessment and management based on information gathered from different research papers found in the literature.