Modifications to the Gustafson method of age estimation from teeth are described. They are designed to minimise the subjective nature of the scoring technique and to quantify the regressive changes in the enamel, dentine and cementum. Randomly selected teeth from 25 Indians were examined by the Gustafson method and by our own modification. It was shown that our modified method resulted in more ...

The further development of Fe(0)-based remediation technology depends on the profound understanding of the mechanisms involved in the process of aqueous contaminant removal. The view that adsorption and co-precipitation are the fundamental contaminant removal mechanisms is currently facing a harsh scepticism. Results from electrochemical cementation are used to bring new insights in the process...

1 Department of Dentistry, University of Joinville Region – Joinville – SC – Brazil. 2 School of Dentistry, University of Itajai Valley – Itajai – SC – Brazil. 3 Department of Restorative Dentistry, Piracicaba Dental School, State University of Campinas – Piracicaba – SP – Brazil. 4 Department of Cariology and Operative Dentistry, Division of Oral Health Sciences, Graduate School of Medical and...

Thermal contraction crack polygons modify the generation, transport, and storage of water in Wright Valley gullies. Water generation is contributed to by trapping of windblown snow in polygon troughs. Water transport is modified by changes to the ice-cement table and active layer topography caused by polygon trough formation. Water storage is modified by sediment grain-size distribution within ...

The effect of dentifrices and toothbrushing on the wear of enamel, exposed dentin, and cementum has been the topic of extensive experimental research.1-3 Little attempt has been made, however, to study the mechanisms that control the surface failure of enamel under an applied stress that results primarily from sliding. To identify the wear phenomenon of enamel at the level of slip or cleavage i...

Co-application of acoustoelasticity and optical interferometry to residual stress analysis is discussed. The underlying idea is to combine the advantages of both methods. Acoustoelasticity is capable of evaluating a residual stress absolutely but it is a single point measurement. Optical interferometry is able to measure deformation yielding two-dimensional, full-field data, but it is not suita...

African wild dogs (Lycaon pictus) are endangered and their population continues to decline throughout their range. Given their conservation status, more research focused on their population dynamics, population growth and age specific mortality is needed and this requires reliable estimates of age and age of mortality. Various age determination methods from teeth and skull measurements have bee...

Caries are the localized destruction of the tissue s of the tooth by bacterial action; either enamel or cementum is demineralized by microbial acids. Traditionally the stem bark of Azadirachta indica was used to clean the teeth due to its antibacterial activity which reduced the incidence of dental caries. In modern life style, the use of Azadirachta indica was minimized and the incidence of de...

Glenoid loosening is the most common cause of failure in primary total shoulder arthroplasty (TSA) and often occurs years after the initial surgery. It is rare for a glenoid component to fail acutely. Several case reports of complete glenoid dissociation appear in the literature. It is important to report these failures to identify technical errors or component design flaws to improve outcomes ...