OBJECTIVES Controversy exists regarding cavity preparation for restoration of interproximal caries in posterior teeth in terms of preserving the tooth structure and suitable stress distribution. This study aimed to assess the effect of extension and type of class II cavities and the remaining tooth structure in maxillary premolars restored with composite resin on the biomechanical properties of...

o bjectives: bond strength of composite resin to enamel and dentin of primary teeth is lower than that to permanent teeth; therefore, it may compromise the ad- hesive bonding. new methods, such as laser application have been recently intro- duced for tooth preparation. the purpose of this study was to evaluate the effect of tooth preparation with bur and er:yag laser on shear bond strength of c...

. Herein we report the first record of Purussaurus Barbosa-Rodrigues for Neogene Argentina. This genus is recorded in Miocene beds different localities Colombia, Venezuela, Brazil, and Perú, includes at least three species with total body lengths ranging from 8 to 13 m. The material reported here a partially preserved tooth (MAS-PV 386) found locality Toma Vieja (Paraná, Entre Ríos Province, Ar...

We measured the molar size from a single population of wild baboons from Amboseli (Kenya), both females (n=57) and males (n=50). All the females were of known age; the males represented a mix of known-age individuals (n=31) and individuals with ages estimated to within 2 years (n=19). The results showed a significant reduction in the mesiodistal length of teeth in both sexes as a function of ag...

OBJECTIVES To present a new guidance technique using transtomography in the operating room and to test the accuracy of this surgical protocol. MATERIAL A new concept of operating room, integrating when necessary this imagery to secure flapless procedures by intraoperative control, is described. This operating room concept, including X ray protection of the operators, is explained in addition ...

BACKGROUND Tooth crown dimensions vary between different ethnic groups, providing insights into the factors controlling human dental development. This present study compares permanent mesiodistal (MD) and buccolingual crown dimensions between four ethnic groups, highlighting patterns of tooth size between these groups and considers the findings in relation to genetic and environmental influence...

Although there have been numerous studies of the extent to which the crown dimensions of the permanent teeth are correlated (MOORREES and REED, Arch Oral Biol 9:685, 1964; GARN, LEWIS and KEREWSKY, J Dent Res 44:350, 1965) comparable information on deciduous tooth dimensional communalities is meagre. Moreover, it is not known whether the crown dimensions of the deciduous teeth show different pa...