This paper describes an unusual clinical report of local argyrosis due to corrosion of endodontic silver point within the buccal root canal of an upper left second premolar. Localized oral pigmentation of the periapical mucosa was observed during routine dental check-up. The X-ray examination revealed endodonticaly treated tooth with overextended silver point and periapical resorption. Removal ...

A study of 361 female melanoma patients and age matched controls was conducted in the four western provinces of Canada. Analysis of reproductive factors showed a significant negative association between number of livebirths and risk of melanoma. The relationship persisted for superficial spreading melanomas after adjustment for host pigmentation factors, freckling, and educational status. An in...

The pigmentation of human gingival tissue is derived from melanin granules, which are synthesized in the melanosomes of melanocytes [1,2]. The nicotine present in tobacco activates melanocytes to promote melanin secretion [3]. Therefore, the melanin pigmentation in gingival tissues has a strong correlation with smoking [4,5]. In 1977, Hedin et al. [5] first reported that smokers showed more pig...

introdouction: one of the reasons that cause a pathologist to make an incorrect diagnosis includes artifacts leading to tissue changes and artificial structures in microscopic slides. the aim of this study was to examine the artifacts in histopathological slides in zahedan school of dentistry. materials and methods: in this cross-sectional study, all the available slides in oral and maxillofaci...

In the present study, complete description of development and metamorphosis an endemic frog Rhacophorus malabaricus, Jerdon, 1870, is documented in its natural habitat from Southern part Western Ghats (Peppara Wildlife Sanctuary, India). A brief illustration each Gosner stage (fertilized egg to metamorphosed froglet) given based on direct monitoring characterisation morphological morphometric v...

Faces each have distinct pigmentation as well as shape, which suggests that both cues may play a role in the perception of faces. However, there is a common implicit assumption that pigmentation cues are relatively unimportant, and so the role pigmentation plays in face perception has gone largely unexplored. This thesis is a systematic investigation of the role of pigmentation in face recognit...

There have been few previous studies of the kinetics of pigmentation following ultraviolet B (UVB) exposure, and these have included only fair-skinned persons. The current study investigated pigmentation increase to steady state and fading in 12 Scandinavians and 12 Indians/Pakistanis. Over a period of 3 weeks the subjects were UV-irradiated 6 times on the right side of the back and 12 times on...