Search

The term transposition is used to refer to an interchange in the position of 2 adjacent teeth within the same quadrant of the dental arch.In complete transposition, both the crowns and the entire root structures of the involved teeth are found parallel in their transposed positions. In incomplete transposition (also called “pseudo” or “partial” transposition) the crowns may be transposed while the root apices remain in their normal positions. Unilateral transposition has been reported more often than bilateral transposition, with the left side being somewhat more frequently involved than the right side. The only dental anomaly that has an apparent association with maxillary canine-lateral incisor transposition is increased third molar agenesis.Treatment of maxillary canine-lateral incisor transposition depends on many factors like the condition of the root of central incisors, shape of lateral incisors, need of extraction because of either severe crowding or profile improvement, etc. Here, we are going to present the management of a rare case report of maxillary right lateral incisor-canine pseudotransposition with minimum available space and agenesis of mandibular third molars.

To evaluate microbial corrosion by weight loss, microbial corrosion and elemental analysis of NiTi and stainless wires after period of 2 months in streptococcus mutans containing media. Percentage change in weight after 2 months is 1.7% and 0.8% in NiTi & SS respectively. Elemental analysis of NiTi wire in streptococcus containing media showed decrease in Ni by 2.9% by weight and Ti decreased 3.07% by weight due to leaching of Ni and Ti from the surface of wires. In stainless steel wire, there was decrease in Fe by 8.82% and Cr 1.39% by weight. Significant microbial corrosion was observed in NiTi wires as compared with SS wires may be attributed to the surface roughness of NiTi wires. However, the role of biofilm is dual and remained controversial due to being protective and corrosive.