Dilaceration of Mandibular Central Incisor: a case report

Dilaceration of teeth can ocur as a result of trauma to its primary predecessors. Crown dilaceration is more rare than root dilacerations. This report describes a rare case of crown dilaceration of the mandibular central incisor caused by trauma. Periapical radiography and cone beam computed tomography scans revealed a severe crown dilaceration in the labial direction. After conventional root canal treatment, a glass fiber-reinforced post was placed and the tooth was restored using the original crown which was removed from the root before root canal obturation. One year after the treatment, the tooth was clinically intact without mobility and there was no sensitivity during percussion. Radiographic examination revealed that the periodontal tissues were healthy and there was no sign of root resorption. It was concluded that correct diagnosis and prompt treatment help to achieve desirable esthetics and function for crown dilecaration

Influence of Fiber-reinforced Composites on the Resistance to Fracture of Vertically Fractured and Reattached Fragments

WOS: 000289318600023PubMed ID: 21419307Introduction: The aim of this in vitro study was to evaluate the fracture type and test the effects of 2 different fibers on fracture strength of roots with reattached fragments. The null hypothesis was that adding suitable fibers to the content of dual-cure adhesive resin cement increases the fracture resistance of reattached fragments under vertical forces. Methods: Root canals of 45 teeth were prepared, and the teeth were intentionally fractured into 2 separate fragments. Control groups (n = 7 each) consisted of unfractured teeth with instrumented and obturated or only instrumented root canals. The fractured teeth were divided into 3 groups (n = 15 each), and separated fragments were reattached by using (1) dual-cured resin cement (Clearfil SA), (2) dual-cured resin cement + polyethylene fiber (Construct), or (3) dual-cured resin cement + glass fiber (Stick-Net). Force was applied at a constant speed of 0.5 mrn/min to the root until fracture. Mean load was recorded and analyzed statistically by using Kruskal-Wallis and Dunn tests (P = .05). Fracture types were analyzed by using chi(2) analysis with Yates correction. Results: Stick-Net demonstrated the lowest fracture resistance (P .05). The roots in the control group showed the highest fracture resistance. However, there was no statistically significant difference between the Construct, Clearfil SA, and control groups (P > .05). Conclusions: Separated fragments of vertically fractured teeth can be reattached by using a dual-cured resin or by adding polyethylene fiber (Construct). (J Endod 2011;37:549-553