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Mullen Warming posted an update 6 months ago
The post is reinserted, excess resin cement is removed, and the cement is polymerized. This technique reduces the volume of resin cement required in each step and consequently the polymerization contraction stress. The 2-step technique is a simple method and a useful option for flared root canals.This study aimed to evaluate the fracture resistance of the bond between an artificial acrylic resin tooth and its acrylic resin denture base after radiotherapy with maximum therapeutic doses of 40 and 70 Gy. Sixty wax blocks were fabricated with heights of 4.0 cm and bases with dimensions of 1.0 cm2 and 1.8 cm2. A posterior acrylic resin tooth was placed on each wax block on the base with the smallest area. Thirty of the blocks were thermopolymerized using the conventional technique and 30 using the microwave technique, and the blocks were divided into 6 groups (n = 10) 1 (control, conventional) and 2 (control, microwave) did not receive radiation; 3 (conventional) and 4 (microwave) received a total dose of 40-Gy radiation; and 5 (conventional) and 6 (microwave) received a total dose of 70 Gy. The groups of 40 and 70 Gy received fractional doses of 2 Gy per day, 5 days per week, until their respective total dose was completed. During the study, all specimens were stored in ballistic gel at a temperature of 37ºC. After the radiotherapy treatments, the bonds between teeth and bases in all groups were submitted to a fracture resistance test. Analysis of variance and Tukey test (P less then 0.05) verified no statistically significant differences between groups 1 and 3 (P = 0.727), 2 and 4 (P = 0.537), or 4 and 6 (P = 0.727). However, there were statistically significant differences between groups 3 and 5 (P less then 0.001), 5 and 1 (P = 0.006), and 6 and 2 (P = 0.034). Therefore, for both polymerization techniques, the maximum radiation dose of 70 Gy weakened the bond between the acrylic resin tooth and its acrylic resin base.Occlusion and chewing-side preference (CSP) are complex aspects of the stomatognathic system. The present study aimed to record the difference in bite force between the dominant and nondominant chewing sides of patients with a CSP. A sample of 95 subjects (aged 20-35 years) with established CSPs was selected. Measurements of bite force on both sides of the jaw were recorded while the subjects were seated in an upright, forward-looking, unsupported natural position. The recordings of each subject were accomplished in a single session with a portable customized bite recording sensor, and the maximal voluntary bite force (MVBF) value was recorded in newtons. The MVBF data were compared in pairs (dominant vs nondominant side; men vs women; and age 0.05).Hypoplasia is an enamel developmental defect characterized by a quantitative disturbance in the formation of mineralized tissue. Among its etiologic factors are local and systemic causes, trauma and dental infections being the most common. This case report presents the functional and esthetic rehabilitation of a 12-year-old boy diagnosed with hypoplasia in the maxillary central incisors. His chief complaints were the unesthetic appearance and sensitivity of the affected teeth. The teeth were restored with composite resin placed with the aid of a direct silicone palatal guide, and the patient was followed up for 12 months. GSK2193874 in vitro The treatment plan allowed the restoration and improvement of function and esthetics, resulting in patient satisfaction.Erythema multiforme (EM) is an acute hypersensitivity reaction that affects the skin and/or mucosa. EM induced by fluconazole is extremely rare, with only 2 previously published case reports. The aims of this article are to report a rare case of severe EM induced by fluconazole in an immunocompetent patient and to review all similar published cases. A 35-year-old man presented with multiple painful superficial ulcerated lesions on the lips, superficial ulcers on the right and left ocular mucosa, and erythematous macules on the right cervical region. Moreover, multiple painful superficial ulcers covered by a serofibrinous pseudomembrane were located on the oral mucosa. The lesions appeared after the initial oral use of fluconazole (100 mg) 3 weeks previously for the treatment of onychomycosis. The clinical diagnosis was EM associated with fluconazole. The antifungal medication was discontinued, and a single dose of intramuscular Diprospan (5 mg of betamethasone dipropionate/2 mg of betamethasone disodium phosphate) was prescribed. Complete healing of all lesions at the 7-day follow-up was observed.The aim of this study was to evaluate the degree of conversion of resin cements polymerized under different ceramic systems. Forty specimens of RelyX ARC (3M ESPE) and Maxcem Elite (Kerr) resin cements were polymerized under 5 types of dental ceramics feldspathic, aluminum oxide-reinforced, aluminum oxide-based strengthened with zirconium oxide, leucite-reinforced, and lithium disilicate-reinforced. Measurements of the degree of conversion of the resin cements were performed 10 minutes, 1 hour, and 24 hours after curing using a Fourier transform infrared spectrophotometer. The values were subjected to a 3-way repeated-measures analysis of variance, and the means were compared with the Fisher protected least significant difference test (α = 0.05). The study findings showed that RelyX ARC resin cement displayed a higher degree of conversion than Maxcem Elite (P 0.05). For both cements, the degree of conversion increased gradually up to 24 hours after curing (P less then 0.05). The ceramic system used directly influenced the degree of conversion of RelyX ARC. Both resin cements displayed an increase in the degree of conversion over time.Supernumerary teeth–teeth in excess of the normal dental complement–are usually asymptomatic, and their presence is detected incidentally on radiographs. Mesiodentes are the most common type of supernumerary teeth, followed by maxillary distomolars, maxillary lateral incisors, mandibular fourth molars, and maxillary premolars. Bilateral occurrence of supernumerary teeth is rare. When supernumerary teeth do occur bilaterally, they are most often associated with a syndrome such as Gardner syndrome or cleidocranial dysostosis. This article presents case reports of 4 nonsyndromic patients with different forms of bilateral supernumerary teeth bilateral mesiodentes, bilateral paramolars, bilateral distomolars, and bilateral parapremolars. The supernumerary teeth were managed by extraction or clinical and radiographic monitoring.