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Varkkallai, India

Krishnan V.,Sri Sankara Dental College | Bhatia A.,Sree Chitra Tirunal Institute for Medical Science and Technology | Varma H.,Sree Chitra Tirunal Institute for Medical Science and Technology
Dental Materials | Year: 2016

Objectives: Enamel damage resulting or arising from/associated with orthodontic treatment such as white spot lesions and surface deterioration after debonding brackets along with incipient carious lesions are considered problems not amenable for routine restorations due to its invasive nature. The present study was aimed at synthesizing and characterizing nHAp and 25 and 50. mol% strontium nHAp as a surface application modality for dental enamel remineralization/repair. Methods: 25 and 50. mol% Sr nHAp was synthesized and characterized in comparison with custom made pure nHAp initially with the help of transmission and scanning electron microscopy as well as toxicological assessment. Further, comparative evaluation of these novel synthesized strontium substituted particles was assessed for its efficacy in repairing damaged enamel with the help of atomic force microscopy, scanning electron microscopy and micro indentation testing. Results: There is increase in crystallinity and reduced particle size favoring dissolution and re-precipitation through small incipient carious lesions and soft white spot areas with 25% Sr-nHAp. Sr doped specimens showed more cell viability in comparison with pure nHAP make it less cytotoxic and hence a biologically friendly material which can be safely applied in patient's mouth. AFM images obtained from 25% and 50% Sr nHAp treated specimens clearly indicated increased roughness in surface topography and performed well with micro indentation test. Significance: The novel synthesized Sr doped nHAp forms an improved treatment modality to tackle the long standing quest for solving the problem of enamel loss with incipient carious lesions and WSL from orthodontic procedures. © 2016 Academy of Dental Materials. Source


Krishnan V.,Sri Sankara Dental College | Krishnan A.,Translational Cancer Research Laboratory | Remya R.,Kerala University | Ravikumar K.K.,Indian National Institute for Interdisciplinary Science and Technology | And 5 more authors.
Acta Biomaterialia | Year: 2011

The present research was aimed at developing surface coatings on β titanium orthodontic archwires capable of protection against fluoride-induced corrosion. Cathodic arc physical vapor deposition PVD (CA-PVD) and magnetron sputtering were utilized to deposit thin films of titanium aluminium nitride (TiAlN) and tungsten carbide/carbon (WC/C) coatings on β titanium orthodontic archwires. Uncoated and coated specimens were immersed in a high fluoride ion concentration mouth rinse, following a specially designed cycle simulating daily use. All specimens thus obtained were subjected to critical evaluation of parameters such as electrochemical corrosion behaviour, surface analysis, mechanical testing, microstructure, element release, and toxicology. The results confirm previous research that β titanium archwires undergo a degradation process when in contact with fluoride mouth rinses. The study confirmed the superior nature of the TiAlN coating, evident as many fewer changes in properties after fluoride treatment when compared with the WC/C coating. Thus, coating with TiAlN is recommended in order to reduce the corrosive effects of fluorides on β titanium orthodontic archwires. © 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. Source


Jodalli P.S.,Yenepoya Dental College and Hospital | Ankola A.V.,KLE University | Hebbal M.,KLE University | Vikneshan M.,Sri Sankara Dental College
Community Dental Health | Year: 2013

Objectives: To assess the perceptions of and concerns regarding dental fluorosis among 12-15 year-old schoolchildren in an area where fluorosis is endemic and to find any association with Tooth Surface Index of Fluorosis (TSIF) scores. Basic Research Design: A cross sectional study. Participants: 316 children aged 12-15 years with varying level of dental fluorosis selected from 696 children screened for fluorosis. Methods: The study was undertaken in three villages in rural Gadag, Karnataka, India, with fluoride levels in the drinking water ranging from 2.2 to 4.5 ppm as estimated by the SPADNS spectrophotometric method. Children's fluorosis was assessed under natural lighting conditions on the labial surface of upper anterior teeth using the TSIF 8-point scale. A self-administered questionnaire assessed knowledge, perceptions and concerns. Data were analysed by frequency distributions and Spearman's correlation coefficients. Main outcome measures: Aesthetic perceptions and TSIF scores. Results: The children were aware of the fluoride presence and its health effects. TSIF scores correlated with: the appearance of front teeth (r=0.135, p=0.015); feeling fluorosis would hinder smiling (r=0.116, p=0.040); feeling distress due to fluorosis (r=0.111, p=0.048). Conclusion: Children were aware of fluoride and its health effects. They also perceived dental fluorosis as an aesthetic problem. © BASCD 2013. Source


Gopinathan P.A.,Sri Sankara Dental College | Kokila G.,Sri Siddhartha Academy of Higher Education | Jyothi M.,Sri Siddhartha Academy of Higher Education | Nair M.S.,Sri Sankara Dental College | And 2 more authors.
Research Journal of Pharmaceutical, Biological and Chemical Sciences | Year: 2014

Central odontogenic fibroma is an unusual and controversial odontogenic tumour. We present a case of central odontogenic fibroma involving premolar- molar region of mandibular left quadrant. The lesion was asymptomatic with well defined borders, without resorption and displacement of the adjacent teeth. The case was initially diagnosed as lateral periodontal cyst based on clinical and radiographic findings, but on histopathological diagnosis it turned out to be central odontogenic fibroma. Hence, this case report gives readers a bird's eye view of the significance of role of histopathology in diagnosis. Source


Vasantha Kumari V.R.,Sri Sankara Dental College | Vallabhan C.G.,Sri Sankara Dental College | Geetha S.,Sri Sankara Dental College | Nair M.S.,Sri Sankara Dental College | Jacob T.V.,Sri Sankara Dental College
Journal of Clinical and Diagnostic Research | Year: 2015

Capillary Haemangioma is a benign vascular tumour characterized by proliferation of blood vessels that are primarily reported to be a developmental hamartomatous lesion of infancy and childhood. Pyogenic granuloma is a non-neoplastic benign lesion found in the oral cavity having a striking predilection for occurrence in the gingiva. The present case report is an atypical presentation of capillary haemangioma on gingiva which is considered to be extremely rare. The lesion in this case was clinically diagnosed as pyogenic granuloma but histopathologically as capillary haemangioma. These lesions present as a diagnostic dilemma to the clinician and can lead to serious complications if not carefully managed. © 2015, Journal of Clinical and Diagnostic Research. All rights reserved. Source

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