Terceiro Pré-Molar Inferior Incluso: Relato de Caso / Third Lower Premolar Included: Case Report

O dente supranumerário é uma anomalia de desenvolvimento configurada pela presença extra de dentes nos maxilares, podendo erupcionar ou permanecer inclusos. Na maioria dos casos são assintomáticos e, muitas vezes, diagnosticados por exames de rotina, por meio da soma entre os achados clínicos e radiográficos. Os exames imaginológicos são indispensáveis nesses casos e a tomografia computadorizada de feixe cônico desempenha papel fundamental na identificação dos detalhes. A manutenção desses elementos pode causar desequilíbrios como distúrbios oclusais, cistos e tumores, sendo a remoção cirúrgica o tratamento mais indicado. O objetivo do presente estudo foi relatar o caso clínico de uma paciente com dente incluso supranumerário na região de mandíbula no intuito de atuar de forma preventiva ao aparecimento de futuras complicações. Paciente do sexo feminino, leucoderma, 37 anos, foi diagnosticada com a presença do dente supranumerário por meio de uma radiografia panorâmica de rotina, sendo solicitada posteriormente uma tomografia computadorizada para confirmação da sua localização. O dente encontrava-se girovertido, totalmente incluso com envolvimento de tecido ósseo entre o segundo pré-molar e primeiro molar inferior esquerdo, sendo, então, indicada a sua remoção que ocorreu sem intercorrências. Concluiu-se que se faz necessária a realização de exames imaginológicos de rotina para a visualização de dentes inclusos e correto planejamento terapêutico, visando o sucesso final do procedimento cirúrgico.

Radiographic Correlation of Skeletal Maturation Using the Stages of Dental Calcification in a Peruvian Population

Objective. To identify the correlation between the Baccetti method of SM (skeletal maturation) and the stages of DC (dental calcification) using the Demirjian method in the Orthodontics Service of the Universidad Peruana Cayetano Heredia (UPCH) in Lima-Peru. Materials and Methods. The sample was obtained from panoramic and lateral radiographs of 200 subjects (116 women and 84 men) with ages between 9 and 17 years. Canine, premolar, and molar teeth calcification was evaluated using the Demirjian method while SM was evaluated by the cervical vertebrae with the Baccetti method. Spearman’s correlation coefficient was used to assess the relationship between the maturation of these cervical vertebrae and DC. Results. There is a high correlation between the Baccetti method of maturation of the cervical vertebrae and the stages of DC ranging from r = 0.635 to 0.774 for men and from r = 0.677 to 0.784 for women (p<0.001), the second lower molar being the one with the highest correlation (r = 0.774 in men) and the second lower premolar (r = 0.784 in women). Conclusions. Stages of DC could be used as a reliable indicator of SM.

Mesial hyperdontia in Sigmodontinae (Rodentia: Cricetidae), with comments on the evolution of the anteroconid in Myomorpha

Supernumerary teeth are common dental anomalies reported in rodents, mainly occurring distally to molars. We report the first case of mesial hyperdontia in wild-caught sigmodontine: a simplified tooth anterior to the right first lower molar in Neacomys amoenus. It affected the first molar morphology, which exhibits an underdeveloped mesial region with a reduced anterior conulid, a similar pattern observed in early known myomorph fossils, including lineages that still possess the last premolar. However, only lineages without premolar display an elongated first lower molar with a large anteroconid, as observed in extant Myomorpha. During the odontogenesis in myomorphs, the posteriormost vestigial diastemal tooth bud, located at the same locus of the last lower premolar, has its development arrested and merges with the cap of the first molar. This process might have contributed to the development of an increased anteroconid in this lineage. The abnormal Neacomys’ atavistic phenotype corroborates the hypothesis that the absorption of the primordium of the last lower premolar had played an important role in the development of first molar’s mesial region. Additionally, it also might have promoted the evolutionary transition from a reduced conulid into an enlarged anteroconid, as deduced from the fossil record and developmental evidence

Infected dentigerous cyst due to traumatic injury in impacted of mandible canine: a case report

Objective: This case study is a case of infected dentigerous cyst involving all erupted incisor teeth and impacted mandible canine. Diagnosis of results from clinical examination, radiographic and histopathologic.Methods: The initial treatment was antibiotic therapy for 2 week, followed with cyst enucleation, extracted of the all fourth incisors and odontectomy lower left canine, lower premolar and upper right molar through intraoral approach under general anesthesiaResults: The evaluation of 2 weeks post surgery treatment showed the healing was good and the chin region showed no sign of inflammation, the color of the tissue was similar to its surrounding.Conclusion: Last sentence of abstract should be a conclusion or further treatment plan for the case. Histological examination and medical history should be placed before the treatment procedureKeywords: Dentigerous Cyst, Enucleation, Infection.

COMPARISON OF APICAL MICROLEAKAGE FOLLOWING CANAL OBTURATION WITH SINGLE-CONE AND WARM VERTICAL CONDENSATION TECHNIQUES USING DIFFERENT ROOT CANAL SEALERS

Microleakage can result in failure of endodontic treatment. An important characteristic of endodontic sealer is sealing ability. The aim of this experimental study was to compare the apical leakage of teeth obturated with single-cone and warm vertical condensation techniques using three different sealers (Cortisomol, AH Plus, Apexit Plus). Materials and Methods: Sixty extracted human lower premolar teeth were selected and randomly assigned to six groups (n = 10), according to the root canal sealer and technique used for obturation: (A) Single-cone technique with Cortisomol; (B) Single-cone technique with AH Plus; (C) Single-cone technique with Apexit Plus; (D) Warm vertical condensation technique with Cortisomol; (E) Warm vertical condensation technique with AH Plus; (F) Warm vertical condensation technique with Apexit Plus. The teeth were immersed in India ink for seven days and clarified using methyl salicylate. The extent of apical dye penetration was measured with a measuroscope in all aspects of the canal. Results: The mean penetration length of dye in Cortisomol, AH Plus and Apexit Plus samples were 0.85, 0.98 and 0.58 mm, respectively. The differences between three groups were not significant (p > 0.05); also, the mean dye penetration in obturating with single-cone and warm vertical condensation techniques using Cortisomol, AH Plus, Apexit Plus was not significantly different. Conclusion: Cortisomol, AH Plus, Apexit Plus were similarly effective in prevention of apical microleakage. Differences in the mean dye penetration between the groups which were obturated with Single-cone and warm vertical condensation were not statistically significant. Key words: Microleakage, single-cone, warm vertical condensation, Cortisomol, AH Plus, Apexit Plus

Retrieval of a periodontally compromised tooth by allogeneic grafting of mesenchymal stem cells from dental pulp: A case report

Objective To report a case of successful allogeneic grafting of mesenchymal dental pulp stem cells (DPSCs) as preliminary findings in a patient with periodontal disease enrolled into clinical trial ISRCTN12831118. Methods Mesenchymal stem cells from the dental pulp of a deciduous tooth from a 7-year-old donor were separated from the pulp chamber and processed via enzymatic digestion and centrifugation. DPSCs were passaged and cultured on a 35 × 13 mm culture dish in minimum essential medium-alpha, without supplementation. After reaching 80% confluency, 5 x 106 allogeneic DPSCs in 250 µl phosphate buffered saline were seeded onto a dry scaffold of lyophilized collagen-polyvinylpyrrolidone sponge placed in the left lower premolar area of a 61-year-old patient with periodontal disease. Surgical access to the lower premolar area was achieved using the flap technique. Results At 3 and 6 months following allogeneic graft, the patient showed no sign of rejection and exhibited decreases in tooth mobility, periodontal pocket depth and bone defect area. Bone mineral density had increased at the graft site. Conclusions Regenerative periodontal therapy using DPSCs of allogeneic origin may be a promising treatment for periodontal disease-induced bone defects.

Injuries and Complications Management with Forsus Appliance

Introduction: Forsus is a useful appliance for non-compliant Class II problems, however various problems can occur when using them.Objective: To demonstrate a comprehensive series of of critical situations that can occur using the Forsus device and to provide the possible solutions of each complication.Materials & Method: The clinical management of the Forsus appliance was analyzed for eighty consecutively treated patients. The Forsus was used five months on average and pictures and clinical record were registered each time a patient had a problem or an injury.Discussion: The most common problem was breakage of the appliance. Breakage could occur as debonding of the lower first premolars or unsoldering of the upper first molar tubes. Lower premolar debonding could be prevented and fixed with an extra layer of flow composite surrounding the bracket base. Lesions of the cheek mucosa were found in several patients. A soft cotton pad used as “wax” was an effective solution to allow soft tissue healing and to prevent spring rubbing against the cheek. Upper molar intrusion occurred mainly when second molars were not included in the upper arch. Some patients experienceddisconnection of the spring and the push rod while opening the mouth wide. They were taught to self-adjust the appliance.Conclusion: The use of the Forsus appliance may lead to relatively frequent problems that the orthodontist can easily preventand manage.