Indian Journal of Dental Education

Conventional tooth preparation of abutment teeth often involves removal of significant amount of tooth structure. When the abutment tooth is sound, conventional full coverage procedures seem to be quite radical. More conservative procedures, such as partial veneer crowns or pin-retained restorations, present limitations in esthetics and retention. Many patients object to these drawbacks. The development of acid etching of enamel to improve the retention of resin, described by Buonocore, in 1955, has proven to be effective in bonding fixed partial dentures to tooth by less destructive means. The following article presents a series of case reports of treatment of single edentulous space with resin bonded prosthesis.

Keywords: Resin bonded prosthesis; Resin cements; Etched cast restorations.

The occlusal forces applied to a fixed partial denture (FPD) are transmitted to the supporting structures through the pontic, connectors, and retainers. The excessive flexing of the long-span FPD, which varies with the cube of the length of span, can lead to material failure of prosthesis or to an unfavorable response. Biomechanical factors such as overload, leverage, torque and flexing, induce abnormal stress concentration in an FPD. Stress concentration is found in the connectors of the prosthesis and in the cervical dentin area near the edentulous ridge. This factor plays an important role in the potential for failure in long-span FPD. The conventional use of a nonrigid connector (NRC) aids in compensating for the difference in the resistance and retention form between the abutments. The design and passive fit of NRC is critical to the success of a longspan FPD. This paper a case report of Pier abutment treated with FPD having Tenon-Mortise Connector.

Keywords: Non-rigid connectors; Tenon-Mortise connectors.

Variations in the newborns oral cavity have been an enduring interest to the pediatric dentist. The occurrence of natal and neonatal teeth is a rare anomaly which for centuries has been associated with diverse superstitions among many different ethnic groups. Natal teeth are more frequent than neonatal teeth. The ratio being approximately 3:1. The purpose of this case report is to review the literature related to the natal teeth folklore and misconceptions and discuss their possible etiology and treatment.

Keywords: Natal teeth; Neonatal teeth; Deciduous incisor.

Aims: The present investigation was carried out to study biochemical analysis on human permanent teeth in Dental Fluorosis, a condition caused by excess intake of fluoride. Methodology: In present study 45 human fluorosed posterior teeth were obtained from department of oral surgery and clinically classified according to Dean’s index into mild, moderate and severe forms. Fifteen posterior normal tooth samples were also collected from patients who opted for denture. The samples were than biochemically analyzed for fluoride and calcium contents by Ion Meter and Atomic Absorption Spectrophotometer respectively. Results: Biochemical analysis showed that increase in fluoride content and decrease in calcium content in fluorosed human teeth when compared to normal. Conclusion: The present study showed that pitting, perforation and tooth getting fractured (chipped off) in dental fluorosis were mainly due to accumulation of fluoride, depletion of calcium in the matrix. 

Keywords: Dental fluorosis; Ion meter; Atomic absorption spectrophotometer.