Sri Kennath J.A.A.,Best Dental Science College
Journal of Forensic Odonto-Stomatology | Year: 2011
Sexual identification of immature skeletal remains is still a difficult problem to solve in Forensic Anthropology. The aim was to evaluate the existence of sexual dimorphism in maxillary first molars. The base sample comprised 200 subjects (100 males and 100 females) aged 17-25 years. The buccolingual (BL) and mesiodistal (MD) diameters of maxillary first molars were measured using digital vernier calipers both intraorally and on study casts. Data was analyzed using Independent sample t-test and paired t-test. Results showed statistically significant sexual dimorphisms in male and female odontometric features. The mean values of the parameters were greater on the left side than on the right side. Amongst the intraoral group, the right maxillary first molar was found to exhibit the greatest sexual dimorphism (5.34%) in terms of buccolingual dimension. Amongst the study cast group, the left maxillary first molar was found to exhibit the greatest sexual dimorphism (5.54%) in terms of buccolingual dimension. The buccolingual dimensions exhibited greater sexual dimorphism than mesiodistal dimensions. Conclusion: sex determination from an incomplete skeleton or young children may be difficult and in such situations the odontometric features of the teeth can be of immense help in determining the sex.
Arul A.S.K.,Best Dental Science College |
Verma S.,Best Dental Science College
Journal of Natural Science, Biology and Medicine | Year: 2014
Rhabdomyosarcoma is a malignant tumor composed of neoplastic mesenchymal cells, with varying degrees of striated muscle cell differentiation. With most cases occurring in children younger than 10 years, it is remarkably rare in adults. Further in adults, the typical pediatric rhabdomyosarcoma variants (embryonal and alveolar sub-types) occur less frequently and exhibit predilection for viscera followed by the head and neck region. A rare case of embryonal rhabdomyosarcoma arising from the buccal mucosa in a 36-year old male patient is herewith reported. Recognition of the correct diagnosis and histological sub-type is of critical importance in the therapy of this disease, since the treatment is not uniform in the literature because of the rarity of this neoplasm in the adult population.
Vijayabala G.S.,College and PGIMSR |
Sudarshan R.,Best Dental Science College
Asian Pacific Journal of Tropical Biomedicine | Year: 2013
Oral cavity is considered to be a kaleidoscope for body's general health. Many systemic conditions do present with diverse oral manifestations. Mucormycosis involving the oral cavity is one such entity that presents as necrosis of bone in immunocompromised patients. Mucormycosis is an opportunistic fungal infection that mainly affects the patients with uncontrolled diabetes mellitus. Hereby, we report a case of mucormycosis involving the palate in a patient with diabetic ketoacidosis. © 2013 Asian Pacific Tropical Biomedical Magazine.
Pushparaj V.,Thiagarajar College of Engineering |
Gurunathan U.,Best Dental Science College |
Arumugam B.,Thiagarajar College of Engineering
Journal of Digital Imaging | Year: 2013
Human identification using dental radiographs is important in biometrics. Dental radiographs are mainly helpful for individual and mass disaster identification. In the 2004 tsunami, dental records were proven as the primary identifier of victims. So, this work aims to produce an automatic person identification system with shape extraction and matching techniques. For shape extraction, the available information is edge details, structural content, salient points derived from contours and surfaces, and statistical moments. Out of all these features, tooth contour information is a suitable choice here because it can provide better matching. This proposed method consists of four stages. The first step is preprocessing. The second one involves integral intensity projection for segmenting upper jaw, lower jaw, and individual tooth separately. Using connected component labeling, shape extraction was done in the third stage. The outputs obtained from the previous stage for some misaligned images are not satisfactory. So, it is improved by fast connected component labeling. The fourth stage is calculating Mahalanobis distance measure as a means of matching dental records. The matching distance observed for this method is comparatively better when it is compared with the semi-automatic contour extraction method which is our earlier work. © Society for Imaging Informatics in Medicine 2012.
Arul A.S.K.J.,Best Dental Science College |
Verma S.,Best Dental Science College
Journal of Natural Science, Biology and Medicine | Year: 2013
Myxomas of the head and neck are rare tumors of uncertain histogenesis. Odontogenic myxomas in maxilla are less common but behave more aggressively, as it spreads through maxillary antrum. It therefore reaches considerable size before being detected. The current case arouses particular interest due to the rapid growth and infiltrating nature of the lesion in a 25-year-old female patient, who denied any leading symptoms, even with the lesion involving extensively. Radiographic and microscopic similarities to a number of entities make diagnostic interpretation of odontogenic myxoma challenging. Therefore sound knowledge of clinical, radiographic and histopathologic features is important to establish an appropriate treatment aimed at a good clinical course and patient cure.
PubMed | Malabar Dental College and Best Dental Science College
Type: Journal Article | Journal: Journal of pharmacy & bioallied sciences | Year: 2016
(1) To evaluate the corrosion resistance of four different orthodontic archwires and to determine the effect of 0.5% NaF (simulating high fluoride-containing toothpaste of about 2250 ppm) on corrosion resistance of these archwires. (2) To assess whether surface roughness (Ra) is the primary factor influencing the corrosion resistance of these archwires.Four different archwires (stainless steel [SS], nickel-titanium [NiTi], titanium molybdenum alloy [TMA], and ion-implanted TMA) were considered for this study. Surface characteristics were analyzed using scanning electron microscopy, atomic force microscopy (AFM), and energy dispersive spectroscopy. Linear polarization test, a fast electrochemical technique, was used to evaluate the corrosion resistance, in terms of polarization resistance of four different archwires in artificial saliva with NaF concentrations of 0% and 0.5%. Statistical analysis was performed by one-way analysis of variance.The potentiostatic study reveals that the corrosion resistance of low-friction TMA (L-TMA) > TMA > NiTi > SS. AFM analysis showed the surface Ra of TMA > NiTi > L-TMA > SS. This indicates that the chemical composition of the wire is the primary influential factor to have high corrosion resistance and surface Ra is only secondary. The corrosion resistance of all wires had reduced significantly in 0.5% acidic fluoride-containing artificial saliva due to formation of fluoride complex compound.The presence of 0.5% NaF in artificial saliva was detrimental to the corrosion resistance of the orthodontic archwires. Therefore, complete removal of residual high-fluorinated toothpastes from the crevice between archwire and bracket during tooth brushing is mandatory.
PubMed | Malabar Dental College, Best Dental Science College, Bapuji Dental College and Hospital and Malabar Dental College and Research Center
Type: Journal Article | Journal: Journal of International Society of Preventive & Community Dentistry | Year: 2016
Osteosarcoma is a very uncommon tumor of the maxillofacial region. Due to the occurrence of the tumor at a young age and its aggressive nature, radical surgery forms the only modality of treatment. A combination of radiotherapy and postoperative chemotherapy has been used for the management of this tumor. A case report of osteosarcoma of the posterior maxilla in an adolescent with a 1-year disease-free follow-up is presented in this report.
Hameed K.A.S.,Thiagarajar College of Engineering |
Banumathi A.,Thiagarajar College of Engineering |
Ulaganathan G.,Best Dental Science College
Micron | Year: 2015
This paper presents an automatic scoring method for p53 immunostained tissue images of oral cancer that consist of tissue image segmentation, splitting of clustered nuclei, feature extraction and classification. The tissue images are segmented using entropy thresholding technique in which the optimum threshold value to each color component is obtained by maximizing the global entropy of its gray-level co-occurrence matrix and clustered cells are separated by selectively applying marker-controlled watershed transform. Cell nuclei feature is extracted by maximal separation technique (MS) based on blue component of tissue image and subsequently, each cell is classified into one of four categories using multi-level thresholding. Finally, IHC score of tissue images have been determined using Allred method. A statistical analysis is performed between immuno-score of manual and automatic method, and compared with the scores that have obtained using other MS techniques. According to the performance evaluation, IHC score based on blue component that has high correlation coefficients (CC) of 0.95, low mean difference (MD) of 0.15, and a very close range of 95% confidence interval with manual scores. Therefore, automatic scoring method presented in this paper has high potential to help the pathologist in IHC scoring of tissue images. © 2015 Elsevier Ltd.
PubMed | Best Dental Science College and Sri Venkateshwara Dental College
Type: Journal Article | Journal: Journal of clinical and diagnostic research : JCDR | Year: 2016
Oral cancer is prevalent worldwide with high incidence of mortality and morbidity. It is associated with poor prognosis and low survival rate. Moreover, patients affected are more likely to develop psychological issues and thus, addressing psychological needs of such patients is crucial.The aim of our study was to assess the quality of life of oral cancer patients in the pre-operative period, thereby providing them with the necessary psychological support.A total of 206 patients, scheduled to undergo treatment for oral cancer were selected from various cancer centres in South India. After informed consent, 171 patients were finally analysed for their quality of life using Functional Assessment of Cancer Therapy-General (FACT-G) version 4; and Functional Assessment of Cancer Therapy Head and Neck (FACT-H&N), as a Quality of Life (QOL) survey.Most of the patients had poor quality of life and were found to be emotionally distressed pre-operatively as they did not have proper emotional support from society.From the study it was observed that catering to the psychological needs of oral cancer patients is important and psychological counselling should be a part of a comprehensive treatment plan for such patients.
PubMed | Awadh Dental College and Hospital and Best Dental Science College
Type: Journal Article | Journal: Journal of the Indian Society of Pedodontics and Preventive Dentistry | Year: 2017
Children attend primary school from as early as 6 years to the mixed dentition stage of about 9 years and spend most of their time in school along with the teachers. School teachers are likely to be among the first to see a child immediately after an injury has occurred, and their knowledge regarding emergency procedures is critical to ensure good prognosis of the clinical treatment.The purpose of the study was to evaluate, by means of a questionnaire, the primary school teachers knowledge and attitude with regard to emergency management of traumatized avulsed teeth and to test the effectiveness of a health education tool.A total of 214 primary school teachers from 24 government schools, in and around East Madurai Panchayat, participated in a 3-month long study. Baseline data were collected using a pretested questionnaire in the 1st month. Based on that data, a health educational tool was prepared. The final assessment was made using the same questionnaire in the 3rd month. Baseline data and final data were compared using Z-test.The knowledge level of 70.83% of primary school teachers was in the very good category after the health education tool, which was initially nil. Similarly, the attitude level also raised drastically with 0.90% initially in the very good category, and after the health education tool, it was 41.20%.From this study, the importance of the need for the steps to increase the knowledge about the emergency management of avulsion is clearly understood. Thus, the main implication of the study is that a health educational tool regarding the emergency management of avulsion is necessary for the primary school teachers during their teacher training program.