Reposicionamento horizontal mandibular com próteses provisórias removíveis tipo overlay – relato de caso Mandibular horizontal repositioning with removable temporary overlay prostheses – case report

Introduction: Rehabilitation with the use of overlay-type removable prostheses is indicated in cases of more severe occlusal dysfunction. This type of treatment meets the need for more immediate results, providing aesthetic improvement while the rehabilitation work is being done, while promoting the gradual rehabilitation of occlusal function, re-adjusting the intermaxillary relationship. In addition, the patient can anticipate the final result of the treatment beforethe definitive prosthesis is made. Objective: To show a clinical case of planning and execution of removable overlays. Case report: JCF patient had occlusal dysfunction and presented as main complaint the aesthetic and functional deficiency. He used a removable partial denture (PPR) only on the upper arch. The existing prosthesis did not present stability due to the loss of some dental elements, pillars of the PPR. Two overlays (upper and lower) were indicated because the patient had good periodontal conditions in the remaining dentalelements that were in a favorable position. Necessary exodontia, adequacy of the buccal environment with sub and supragingival scaling and the fabrication of overlays were performed. Conclusion: The use of temporary overlays can provide the necessary time for the patient to adapt to the new occlusal conformation in the period in which the restorations and definitive prostheses are expected to be performed. The use of overlays presented a satisfactoryresult for the proposed treatment, since it promoted the functional rehabilitation, restored aesthetic, even temporarily, and motivated the patient to continue the treatment. According to the patient, there were significant improvements in chewing quality and self-esteem.Introduction: Rehabilitation with the use of overlay-type removable prostheses is indicated in cases of more severe occlusal dysfunction. This type of treatment meets the need for more immediate results, providing aesthetic improvement while the rehabilitation work is being done, while promoting the gradual rehabilitation of occlusal function, re-adjusting the intermaxillary relationship. In addition, the patient can anticipate the final result of the treatment beforethe definitive prosthesis is made. Objective: To show a clinical case of planning and execution of removable overlays. Case report: JCF patient had occlusal dysfunction and presented as main complaint the aesthetic and functional deficiency. He used a removable partial denture (PPR) only on the upper arch. The existing prosthesis did not present stability due to the loss of some dental elements, pillars of the PPR. Two overlays (upper and lower) were indicated because the patient had good periodontal conditions in the remaining dentalelements that were in a favorable position. Necessary exodontia, adequacy of the buccal environment with sub and supragingival scaling and the fabrication of overlays were performed. Conclusion: The use of temporary overlays can provide the necessary time for the patient to adapt to the new occlusal conformation in the period in which the restorations and definitive prostheses are expected to be performed. The use of overlays presented a satisfactoryresult for the proposed treatment, since it promoted the functional rehabilitation, restored aesthetic, even temporarily, and motivated the patient to continue the treatment. According to the patient, there were significant improvements in chewing quality and self-esteem

Manifestações orais em pacientes infectados com sars COV-2 / Oral manifestations from sars COV-2 in infected patients

The recent outbreak of the novel coronavirus 2019 (Covid-19) spread rapidly throughout several countries around the worldand has posed enormous health challenges. Symptom of Covid-19 are non-specific and the disease presentation can range from no symptoms (asymptomatic) to severe pneumonia and death. The most commonly reported oral manifestations in the literature are ulcer, erosion, bulla, vesicle, pustule, fissured or depapillated tongue, macule, papule, plaque, pigmentation, halitosis, among others. The professionals must be prepared to recognize theoral manifestations of the disease to promote the most adequate treatment. This study presents 5 cases of oral manifestations in patients diagnosed with Covid-19. The patients presented ulcerations, vesiculopapular lesions, papillary lesions, lingual erythesa, keratose-like lesions and white plaque. Lips, tongue, labial mucosa, palate and gum were affected. If this hypothesis is proven, when health professionals observe these oral manifestations, they could refer these patients to be tested and perform the appropriate treatment.

Stress distribution around short implants with different frictional joint designs: a photoelastic colorimetric analysis / Distribuição de tensão em torno de implantes curtos com diferentes designs de fricção: uma análise colorimétrica

Aim: To compare, biomechanically, two types of short implants with different frictional implant/abutment joint designs. Methods: Two groups (n = 10) were divided in straight platform (DSP, 5 x 5.5 mm) and angled platform (30°) (Kopp, 5 x 6.0 mm). The loads applied axially were 100 N, 200 N and 400 N. A photoelastic colorimetric analysis around the implants was performed, based on the magenta fringes, measured in pixels. The data were analyzed by the One-Way ANOVA with repeated measures, Tukey and Mann-Whitney U tests (p < 0.05). Results: The short implants demonstrated similar biomechanical behavior, but statistical difference occurred in the group Kopp, under the axial load of 400 N (p < 0.05). Conclusion: The implant design showed influence on the stress distribution around the locking taper short dental implants. In both groups, the area of greatest stress distribution was at the apical region. 

TECHNICAL ADAPTATIONS OF MANUAL AND ROTARY INSTRUMENTS FOR PREPARING A GIANT CANINE TOOTH.

Teeth with extraordinary length are a rare condition that complicates endodontic procedures due to the difficult in being reached the working length and making the adequate preparation of the root canal, once there are no endodontic instruments longer than 31 mm commercially available. This study presents description of technical adaptations for endodontic preparation of a maxillary canine with 39.59 mm of length. The procedures adopted were based on the consultation of the literature regarding the treatment of long teeth and included endodontic instrument adaptation and changing the reference point of the instrument. This study shows that extremely long teeth can be successfully instrumented endodontically using the described clinical techniques

Assessing the prevalence of S-shaped root canal and associated genes in humans

Background: Multiple signaling molecules have been shown to play crucial roles in dental root develop-ment. Therefore, we aimed to investigate the prevalence of S-shaped roots and also to investigate, if single nucleotide polymorphisms (SNPs) in BMP2, BMP4 and SMAD6 are associated with this phenotype in hu-mans. Methods: This is a cross-sectional phenotype-genotype association study that used radiographs to de-termine the phenotypes and DNA to investigate SNPs in candidate genes. During the radiographic exam, teeth presenting root canal(s) doubly curved were considered S-shaped roots. SNPs in BMP2 (rs10 05464 and rs235768), BMP4 (rs17563) and SMAD6 (rs2119261 and rs3934908) were blindly genotyped by real-time PCR using TaqMan assay. The relative and absolute frequency of S-shaped roots were calculated. Chi-square test was used to compare the genotype distributions between control and S-shaped groups. Results: Among the 578 subjects, 61 (10.6 %) presented at least one tooth with an S-shaped root. The most commonly affected type of tooth was the premolar. rs1005464 in BMP2 was statistically associated with an S-shaped root (p = 0.036). rs235768 in BMP2 was associated with an S-shaped root also in mandibular teeth (p = 0.017). A statistical significance was observed for the rs3934908 in SMAD6 (p = 0.049) for S-shaped root in the mandible. In the analysis stratified according to the type of tooth, rs235768 in BMP2 was associated with S-shaped roots in premolars (p = 0.029). Conclusion: The prevalence of S-shaped roots is 10.6 % in permanent teeth. SNPs in BMP2 and SMAD6 could be involved in a higher chance to present S-shaped roots. (c) 2022 Elsevier GmbH. All rights reserved

ASSESSING THE PREVALENCE OF S-SHAPED ROOT CANALS AND GENES ASSOCIATES IN HUMANS

Multiple signaling molecules have been shown to play crucial roles in development. Therefore, we aim to investigate the prevalence of S-shaped roots and whether single nucleotide polymorphisms (SNPs) in RUNX2 (rs59933488 and rs1200425) are associated with these S-shaped roots in humans. This is a cross-sectional phenotype-genotype association study that used radiographs to determine phenotypes, and DNA to investigate SNPs in RUNX2. On radiographs, teeth that had doubly curved root canals were considered S-shaped roots. SNPs in RUNX2 were genotyped blindly by real-time PCR using the TaqMan assay. The relative and absolute frequency of S-shaped roots were calculated and the chi-square test was performed.used to compare genotype distributions between control and S-shaped groups. Among the 578 subjects selected for the phenotype, 61 (10.6%) had at least one tooth with an Sshaped root, the premolar being the most affected and in the mandible. Therefore, SNPs in RUNX2 were not associated with S-shaped root risk. Research Ethics Committee protocol No. 3,150,55

Oral Cleft Related-Genes may be Involved in Root Curvature of Maxillary Lateral Incisors

Objective The maxilla is formed by the medial nasal and maxillary processes fusion. The dental lamina develops from 2 origins connecting in the lateral incisor. The maxillary lateral incisor region is often affected by dental anomalies and clefting. It is possible that genes involved in oral cleft could also be associated with a variety of phenotypic variations in the maxillary lateral incisor. In this phenotype–genotype study, we explored the association between polymorphisms in the oral-cleft-related genes BMP2 and BMP4 and root curvature of maxillary lateral incisors. Design Cross-sectional study. Settings Universities and private clinics. Patients, Participants Panoramic radiographs and DNA from 231 patients were analyzed. Main Outcome Measures Schneider method (1971) was applied to estimate the degree of root curvature of the maxillary lateral incisors and to classify the root as straight (5° or less) or curved (higher than 5°). Genetic polymorphisms in BMP2 (rs235768 and rs1005464) and BMP4 (rs17563) were genotyped. Statistical analysis was performed. Results A total of 401 teeth (199 left and 202 right) were evaluated. Genetic analysis demonstrated trends toward association for the rs1005464 in BMP2 (P  =  .025) in co-dominant model and in dominant model (P  =  .026) for left incisors. The rs235768 in BMP2 showed trends toward association with the degree of root curvature in left incisors in the recessive model (P  =  .031). rs17563 in BMP4 also showed trends toward association with the degree of the root curvature in left incisors (P  =  .019). Conclusion BMP2 (rs235768 and rs1005464) and BMP4 (rs17563) might be involved in maxillary lateral incisor root curvature