Browsing by Author "Agrawal, NK"
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Publication Ameloglyphics: a Novel appraisal of the Enamel Structure in Identification of an individual(Institute of Medicine, 2014) Dahal, S; Boaz, K; Srikant, N; Agrawal, NKAbstract Introduction: Ameloglyphics is a newly emerging field that studies the patterns of enamel rods. Amelo means enamel and glyphics means carving. It is said by some investigators that the patterns of enamel rods are unique to each individual. Methods: The aim of the study was to estimate and categorise tooth print patterns among 30 teeth of known age and gender and to analyze the variation among carious and non-carious teeth. The tooth surface was etched and imprint was transferred to a slide using an adhesive tape. Further evaluation was done under light microscopy by using verifinger SDK software. Results: The various patterns observed were straight, wavy, branched, looped, intersecting and radiating. The carious teeth and deciduous dentition showed predominance of wavy and straight pattern which is in accordance with their softer nature and increased susceptibility to bacterial invasion. Keywords: enamel, tooth prints, biometrics, ameloglyphicsPublication Comparison in Total Sialic acid levels between control and cancer patients visiting Teaching hospital, as a basis for oral cancer diagnosis(Institute of Medicine, 2015) Dahal, S; Agrawal, NK; Shrestha, LAbstract Introduction: Oral squamous cell carcinoma is the most common malignant neoplasm in the head and neck region and remains one of the major causes of worldwide deaths. Recognition and diagnosis of oral cancer at an early stage can reduce morbidity and mortality. Oral cancer screening in a large population can be done non-invasively by using sialic acid in saliva as a biological marker. The aim of this study was to estimate the total sialic acid (TSA) level in three categories of populations: normal healthy controls, tobacco users with a premalignant lesion like leukoplakia, and tobacco users who developed oral squamous cell carcinoma (OSCC). Methods: A total of 45 subjects were involved in the study. Saliva was collected from three groups and total sialic acid was estimated. The data obtained was analyzed statistically using ANOVA and Tukey HSD test. Results: A comparison of total salivary sialic acid levels in three groups revealed a significant rise in the level of TSA in OSCC group when compared to control group. The difference in the mean level of TSA of precancerous group was also significant when compared to control group. Conclusion: The present study showed a significant rise in the mean level of total salivary sialic acid from control group (51.57 mg %) to precancerous group (74.64 mg %) to OSCC group (104.30 mg %), and suggests that it can be used as a reliable tool in oral cancer screening as the technique is non-invasive and inexpensive. Keywords: oral cancer, salivary markers, total salic acidPublication Pattern of impacted mandibular third molar angulation in patients visiting Tribhuvan University Teaching Hospital(Institute of Medicine, 2018) Dahal, S; KC, K; Agrawal, NKAbstract Introduction:The most common tooth to get impacted is the third molar. An impacted tooth can cause complications like pericoronitis, resorption of roots of adjacent tooth and temporomandibularjoint problems. Methods:We examined orthopantomogram radiographs of 360 patients (151 males, 209 females) with bilateral impaction. Impacted mandibular third molars were classified into mesioangular, horizontal, vertical and distoangular based on angulation. Results:Mesioangular impaction was the commonest form of impaction for sexes combined, males and females except for mandibular right side in females. Distoangular impaction was the least observed. For right side, there was a significant association between sex and the type of impaction of mandibular third molar. However, there was no significant association for the left side. Conclusion:Mesioangular form of impaction for mandibular third molar was the most common in our study, and distoangular form of impaction was the least observed.Publication Role of dentists in Disaster Victim Identification of Sita air crash, Nepal(Institute of Medicine, 2014) Dahal, S; Agrawal, NK; Shrestha, PKAbstract Introduction: Sita Air Dornier 228, an early-morning flight from Tribhuvan International Airport Kathmandu to Lukla on Friday 28 September 2012 plunged into the banks of the Manohara River in Bhaktapur three minutes after takeoff, killing all 16 passengers and 3 crew members out of which seven were Britons, five were Chinese, one American and the rest, including the crew members, were Nepalese. All deceased were brought to Department of Forensic Medicine, Institute of Medicine for identification. Methods: Autopsy was carried out systematically by Forensic Medicine experts and dental experts. Personal belongings, medical and dental findings were recorded. Ante-mortem data was collected from family members, relatives and respective embassies. Reconciliation was carried out comparing ante-mortem and post-mortem records, Results: Of the human remains recovered, sixteen positive identifications were made by dental findings correlated with dental records and description given by family member. Two passengers were identified on medical grounds and the last one by exclusion. Conclusion: This paper describes the crash victim identification of Sita Air Dornier 228. It highlights the importance of dental records and involvement of Forensic odontologist as a part of Disaster Victim Identification team. The authors were part of Disaster Victim Identification Team, Nepal for Sita Air Crash. Keywords: Sita Air, Disaster victim identification, Forensic odontology, Aircrash identificationPublication Supernumerary Maxillary Lateral Incisor with Dens Evaginatus in Maxillary Second Premolar: A case report(Institute of Medicine, 2018) Dahal, S; Agrawal, NKNA.Publication Twin Mesiodens present in maxillary arch, a rare finding: A report of two cases(Institute of Medicine, 2015) Agrawal, AK; Agrawal, NK; Dahal, SAbstract The term mesiodens refers to a supernumerary tooth that is present in the midline of the maxilla between the two central incisors. Its occurrence as multiples is termed as ‘mesiodentes’. Double mesiodentes is a rare phenomenon. The prevalence of mesiodens varies between 0.09% and 2.05% in different studies. The etiology of this dental anomaly remains unclear. There probably exists a familial disposition. This is a case report of two patients presented with two mesiodens. Keywords: mesiodens, mesidentes, supernumerary tooth