RESUMEN
Intrusion of permanent teeth is not extensively covered in the literature compared to other injuries. Treatment guidelines have been published and clinical data is accumulating to support the current recommendations, which are illustrated in the three cases here. This review evaluates the current information about management of traumatically intruded permanent teeth. As more data accumulates, uncertainties with respect to both treatment recommendations and long-term outcomes can be expected to be elucidated.
Asunto(s)
Traumatismos de los Dientes , Niño , Humanos , Masculino , Traumatismos de los Dientes/diagnóstico , Traumatismos de los Dientes/terapiaRESUMEN
BACKGROUND: The long-term use of calcium hydroxide has been discouraged throughout the recent decade due to a proposed decrease in fracture resistance of dentin. This weakening has grave implications when used on immature teeth with thin dentinal walls in procedures such as apexogenesis. AIM: The purpose of this study was to identify the effects of three commercial calcium hydroxide formulations (Vitapex, Ultracal XS and Pulpdent) on the fracture resistance of dentin in relation to time. MATERIALS AND METHODS: Two-hundred and forty deciduous lamb incisors were collected, cleaned and shaped, and filled with one of the three calcium hydroxide formulations and one negative saline control. At one, three, and 6 months, these teeth were fractured on an Instron machine to determine fracture resistance. RESULTS: No statistical differences were observed among any of the experimental groups, nor between any of the experimental groups and negative control groups. CONCLUSIONS: Based on our findings, there appears insufficient evidence to support that either Vitapex, Ultracal XS, or Pulpdent will cause a decrease in fracture resistance of dentin within a 6-month period.
Asunto(s)
Hidróxido de Calcio/farmacología , Dentina/efectos de los fármacos , Irrigantes del Conducto Radicular/farmacología , Siliconas/farmacología , Fracturas de los Dientes/prevención & control , Animales , Análisis del Estrés Dental , Incisivo , Materiales de Obturación del Conducto Radicular/farmacología , Oveja Doméstica , Factores de TiempoRESUMEN
INTRODUCTION: The purpose of this study was to compare the efficacy of the pulverization and sterile paper point techniques for sampling root canals using 5.25% NaOCl/17% EDTA and 1.3% NaOCl/MTAD (Dentsply, Tulsa, OK) as irrigation regimens. METHODS: Single-canal extracted human teeth were decoronated and infected with Enterococcus faecalis. Roots were randomly assigned to 2 irrigation regimens: group A with 5.25% NaOCl/17% EDTA (n = 30) and group B with 1.3% NaOCl/MTAD (n = 30). After chemomechanical debridement, bacterial samplings were taken using sterile paper points and pulverized powder of the apical 5 mm root ends. RESULTS: The sterile paper point technique did not show growth in any samples. The pulverization technique showed growth in 24 of the 60 samples. The Fisher exact test showed significant differences between sampling techniques (P < .001). The sterile paper point technique showed no difference between irrigation regimens. However, 17 of the 30 roots in group A and 7 of the 30 roots in group B resulted in growth as detected by pulverization technique. Data showed a significant difference between irrigation regimens (P = .03) in pulverization technique. CONCLUSIONS: The pulverization technique was more efficacious in detecting viable bacteria. Furthermore, this technique showed that 1.3% NaOCl/MTAD regimen was more effective in disinfecting root canals.
Asunto(s)
Cavidad Pulpar/microbiología , Irrigantes del Conducto Radicular/uso terapéutico , Preparación del Conducto Radicular/instrumentación , Hipoclorito de Sodio/uso terapéutico , Apicectomía/métodos , Ácido Cítrico/uso terapéutico , Cavidad Pulpar/efectos de los fármacos , Dentina/efectos de los fármacos , Dentina/microbiología , Doxiciclina/uso terapéutico , Ácido Edético/uso terapéutico , Enterococcus faecalis/efectos de los fármacos , Enterococcus faecalis/aislamiento & purificación , Humanos , Viabilidad Microbiana/efectos de los fármacos , Papel , Polisorbatos/uso terapéutico , Preparación del Conducto Radicular/métodos , Ápice del Diente/efectos de los fármacos , Ápice del Diente/microbiologíaRESUMEN
INTRODUCTION: The purpose of this investigation was to determine the concentration of sodium hypochlorite and the irrigation time required to disinfect dentin cylinders infected with Enterococcus faecalis. METHODS: Four hundred fifty dentin cylinders (5 mm in diameter and 4 mm in height) with a lumen (2-3 mm in width) were prepared from freshly extracted bovine incisors. The cementum and predentin were then removed. The tubules were opened by using a 4-minute application with 17% ethylenediaminetetraacetic acid and 5.25% NaOCl and then exposed to E. faecalis (ATCC 4082) for 3 weeks in brain-heart infusion broth. The cylinders were then divided into 3 groups, and a 1.3%, 2.5%, or 5.25% concentration of NaOCl was applied in 5-, 10-, 15-, 20-, 25-, 30-, 35-, and 40-minute intervals for a total of 30 subgroups including positive and negative controls. Each test sample was placed into a tube of 2 mL brain-heart infusion broth and incubated for 72 hours. Absence of turbidity demonstrated no bacterial growth, whereas turbidity indicated presence of remaining viable bacteria. RESULTS: The most effective irrigation regimen was 5.25% at 40 minutes, whereas irrigation with 1.3% and 2.5% NaOCl for this same time interval was ineffective in removing E. faecalis from infected dentin cylinders. CONCLUSIONS: High concentration and long exposure to NaOCl are needed for elimination of E. faecalis contaminated dentin.