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Kohli S.,University of Kuala Lumpur | Kalsi R.,Shree Bankey Bihari Dental College
Journal of Clinical and Diagnostic Research | Year: 2016

Introduction: Dual arch impression technique signifies an essential improvement in fixed prosthodontics and has numerous benefits over conventional impression techniques. The accuracy of working dies fabricated from dual arch impression technique remains in question because there is little information available in the literature. Aim: This study was conducted to compare the accuracy of working dies fabricated from impressions made from two different viscosities of impression materials using metal, plastic dual arch trays and custom made acrylic trays. Materials and Methods: The study samples were grouped into two groups based on the viscosity of impression material used i.e. Group I (monophase), whereas Group II consisted of Dual Mix technique using a combination of light and heavy body material. These were further divided into three subgroups A, B and C depending on the type of impression tray used (metal dual arch tray, plastic dual arch tray and custom made tray). Measurements of the master cast were made using profile projector. Descriptive statistics like mean, Standard Deviation (SD) were calculated for all the groups. One way analysis of variance (ANOVA) was used for multiple group comparisons. A p-value of 0.05 or less was considered statistically significant. Results: The gypsum dies obtained with the three types of impression trays using two groups of impression materials were smaller than the master models in dimensions. Conclusion: The plastic dual arch trays produced dies which were the least accurate of the three groups. There was no significant difference in the die dimensions obtained using the two viscosities of impression materials. © 2016, Journal of Clinical and Diagnostic Research. All rights reserved.


Shukla Dr. D.,Jamia Millia Islamia University | Chowdhry A.,Jamia Millia Islamia University | Bablani D.,Jamia Millia Islamia University | Jain P.,Shree Bankey Bihari Dental College | Thapar R.,KLE University
Journal of Forensic Odonto-Stomatology | Year: 2011

This study aims to determine the stability of palatal rugae before and after orthodontic treatment. 50 orthodontic cases were selected with pre- and posttreatment casts and 50 casts were randomly selected as variables. Landmarks on the palatal raphe and rugae were marked on the maxillary casts. Points were made on medial and lateral ends of first, second and third rugae. Each cast was photographed, measured and then trimmed leaving only the rugae area of the hard palate. In the pre and post-treatment group, changes in transverse measurements were significantly different for lateral points of first rugae and anteroposterior changes were significant for the distances between first and second rugae. All inter-point measurements of third rugae were stable in post-treatment casts. Thirty blinded examiners compared 50 trimmed preorthodontic casts to similarly prepared one hundred casts for possible matches based on pattern of rugae. The percentages of correct matches for examiners had a median of 90%. The matching of pre-operative and post-operative orthodontic casts demonstrated that although some changes do occur in the rugae during orthodontic treatment, the morphology of palatal rugae remains stable throughout life. Hence carefully assessed rugae pattern may have a definite role in forensic identification. Further, points associated with the third palatal ruage were the most immutable over a person's life and hence could be used as a reference to evaluate the changes in teeth positions during orthodontic treatment.


PubMed | Triveni Dental College, Vydehi Institute of Dental science and Research Center, Vyas Dental College and Hospital, Kalinga Institute of Dental science and 3 more.
Type: Journal Article | Journal: Nigerian journal of surgery : official publication of the Nigerian Surgical Research Society | Year: 2015

Ameloblastomas are an inscrutable group of oral tumors. Basal cell ameloblastoma is a rare variant of ameloblastoma with very few cases reported until date. The tumor is composed of more primitive cells and has less conspicuous peripheral palisading. It shows remarkable similarity to basal cell carcinoma, basal cell adenoma and intra-osseous adenoid cystic carcinoma. This report describes the case of a 27-year-old male with an ameloblastoma in the right posterior mandible. Orthopantomography computed tomography and finally histopathological examination directed us toward the confirmatory diagnosis of basal cell variant of ameloblastoma. Considering the rarity of the lesion and histological paradox regarding its diagnosis, we report here an interesting and rare case of basal cell ameloblastoma of the mandible with emphasis on differential diagnosis from other entities with basaloid differentiation having varying prognosis. After surgery, long-term follow-up at regular intervals is recommended as no sufficient statistical information regarding the behavior of this tumor is available.


Singh S.,Shree Bankey Bihari Dental College | Sharma A.,Institute of Dental Studies and Technology | Sood P.B.,PDM Dental College and Research Institute | Sood A.,ESI Hospital Rohini | And 2 more authors.
Journal of Oral Biology and Craniofacial Research | Year: 2015

Introduction: The present study was undertaken to assess the caries activity by comparing the pH, buffering capacity, calcium, phosphorous, amylase along with the association of mutans in saliva for caries-free and caries-active children and to find out the interrelationship amongst the two groups. Methodology: The study sample of 80 children, aged between 4 and 8 years were included in the study. Caries status of each child was recorded using DMFS. They were divided into two groups: (i) caries-free group (40) and (ii) caries-active group (40). After collecting the salivary samples, mutans were determined using Saliva-Check mutans kit and buffering capacity by Saliva-Check Buffer kit. The remaining samples were sent to laboratory for analyzing pH by electrode pH meter, calcium by OCPC(o-cresolphthalein complexone) photometric method, phosphorous by phosphomolybdate/UV method, amylase by CNP-G3(2chloro-4-nitrophenyl-alpha-maltotrioside) method using semi-autoanalyzer. Results: The results obtained were tabulated and subjected to statistical analysis. The pH, buffering capacity, calcium and phosphorous level were found to be increased with the decrease in the caries activity of the children whereas amylase activity was increased with the increase in caries activity. It was observed that 77.5% children were tested positive and 22.5% were tested negative for mutans in caries-active group whereas 100% children were tested negative for mutans in caries-free group. Conclusion: The physicochemical properties of saliva, such as pH, buffering capacity, calcium, phosphorous, amylase and Streptococcus mutans has a definite relationship with caries activity. © 2015 Craniofacial Research Foundation.


PubMed | Institute of Dental Studies and Technology, ESI Hospital Rohini, PDM Dental College and Research Institute and Shree Bankey Bihari Dental College
Type: Journal Article | Journal: Journal of oral biology and craniofacial research | Year: 2015

The present study was undertaken to assess the caries activity by comparing the pH, buffering capacity, calcium, phosphorous, amylase along with the association of mutans in saliva for caries-free and caries-active children and to find out the interrelationship amongst the two groups.The study sample of 80 children, aged between 4 and 8 years were included in the study. Caries status of each child was recorded using DMFS. They were divided into two groups: (i) caries-free group (40) and (ii) caries-active group (40). After collecting the salivary samples, mutans were determined using Saliva-Check mutans kit and buffering capacity by Saliva-Check Buffer kit. The remaining samples were sent to laboratory for analyzing pH by electrode pH meter, calcium by OCPC(o-cresolphthalein complexone) photometric method, phosphorous by phosphomolybdate/UV method, amylase by CNP-G3(2chloro-4-nitrophenyl-alpha-maltotrioside) method using semi-autoanalyzer.The results obtained were tabulated and subjected to statistical analysis. The pH, buffering capacity, calcium and phosphorous level were found to be increased with the decrease in the caries activity of the children whereas amylase activity was increased with the increase in caries activity. It was observed that 77.5% children were tested positive and 22.5% were tested negative for mutans in caries-active group whereas 100% children were tested negative for mutans in caries-free group.The physicochemical properties of saliva, such as pH, buffering capacity, calcium, phosphorous, amylase and Streptococcus mutans has a definite relationship with caries activity.


Roychoudhury S.,Shree Bankey Bihari Dental College | Nagori S.A.,All India Institute of Medical Sciences | Roychoudhury A.,All India Institute of Medical Sciences
Journal of Oral Biology and Craniofacial Research | Year: 2015

Aim: To retrospectively evaluate neurosensory disturbance (NSD) after bilateral sagittal split osteotomy (BSSO). Material and methods: A retrospective review was carried out to assess inferior alveolar nerve function in patients treated by BSSO from 2010 to 2013. All patients included in the study were assessed using objective (cotton swabs and pin prick testing) and subjective testing (questionnaire) for inferior alveolar nerve function after a minimum of 1 year of follow-up. Medical records of the patients were used to assess the incidence of NSD in the immediate post-operative period. Results: 15 patients (30 sides) had undergone BSSO during the specified time period. On subjective testing, NSD was reported in 22 operated sides (73.3%) in the immediate post-operative period, while 4 operated sides (13.3%) reported persistent NSD. On objective testing, immediate post-operative NSD was seen in 20 operated sides (66.7%). After a minimum of 1 year follow-up, recovery was seen in 18 operated sides while persistent NSD was seen in 2 operated sides (6.7%). Conclusion: NSD of the inferior alveolar nerve is a common complication after BSSO in the immediate post-operative period. However in a long term, nerve function usually recovers. © 2015 Craniofacial Research Foundation.


PubMed | Shree Bankey Bihari Dental College
Type: Journal Article | Journal: International journal of critical illness and injury science | Year: 2011

This is a case report of a 13-year old child diagnosed with hemophilia A. He reported with a bleeding wound in the middle part of the hard palate, due to trauma from a lead pencil. An intraoral palatal stent was planned to provide continuous pressure, stabilize the clot and allow local delivery of hemostatic agent. The stent was fabricated with a thermoplastic silicone rubber (biostar) under vacuum. The hemostatic agent used was one 500 mg capsule of tranxemic acid that was crushed and applied as a paste every 6 hourly. The patient was admitted under supervision for 3 days, where Recombinant factor VIII (rFVIII) intravenous infusion of 15-25 U/kg twice a day was given. Complete healing was observed in the traumatized area within 10 days. This article emphasizes on prenatal diagnosis, carrier screening and counseling of parents born with hemophilic children.


PubMed | Shree Bankey Bihari Dental College
Type: Comparative Study | Journal: The journal of contemporary dental practice | Year: 2012

Production of exemplary crowns and fixed partial dentures depends upon the usage of impression material and its technique of usage that accurately reproduces prepared teeth and their relationship to the adjacent oral structure.To evaluate the linear dimensional accuracy of the elastomeric impressions using various impression techniques using different combinations of viscosities of impression materials.Crown preparation was done in a dentulous acrylic resin denture base model with six natural teeth embedded into it was made to represent the dentulous maxillary arch. A total of 55 impressions were obtained and poured in die stone using various impression techniques with different combinations of viscosities of impression materials.Among the six techniques used, the heavy body light body two-step technique using custom tray showed the least distortion which was closely followed by the putty wash two-step technique with 2 mm spacer using stock tray.The study revealed that the heavy body light body two-step technique with custom tray provided the best results.Dimensional accuracy of impressions is very much required for precisely fitting of prosthesis. This study may be helpful to select the technique and materials as per clinical requirement of accuracy of impressions.


PubMed | Prince Sattam Bin Abdulaziz University and Shree Bankey Bihari Dental College
Type: Journal Article | Journal: The journal of contemporary dental practice | Year: 2016

It has been since a long time that the use of base-metal alloys has significantly increased in the area of prosthetic science. One of the factors contributing for the increasing use of base-metal alloys is the increasing and high cost factor of noble metals. Although numerous materials have been tried since the recent past, Cobalt-Chromium (CoCr) alloys still form the most commonly used ones because of the numerous advantages they offer. Titanium alloys are also significantly being used in this field because of their high resistance strength and high corrosion resistance. Therefore, we aimed to evaluate the flexure strength and fatigue resistance of clasps made up of CoCr alloys and Nickel-titanium (NiTi) alloys.We evaluated the retentive forces of CoCr and NiTi clasps two different sizes engaging retentive undercuts of different depths (0.25 and 0.50 mm). Mandibluar second premolar was prepared to frame the prosthesis for missing mandibular first and second molar. A total of 50 clasps were included in the study out of which 30 were NiTi clasps and 30 CoCr clasps. We evaluated the loading of the force at the rate of half Newton(N)/second at the central part of the specimen until fracturing of the specimen occurred and finally measurement of the modulus of elasticity was also done. Statistical analysis was carried out; unpaired t test was used for evaluating the level of significance.The mean load needed for CoCr clasps was 0.7450 and for NiTi clasp was 0.6140 Kgf for producing a deflection of 0.25 mm. As far as flexibility is concerned, more value was seen in NiTi group than CoCr group. For deflecting the clasp up to 0.50 mm, the mean load needed for CoCr clasps was 1.4102 and for NiTi clasp was 0.8260 Kgf. The results were statistically significant. While measuring the flexibility, more value (p < 0.05) was seen in NiTi group than in CoCr group. NiTi alloy clasps had mean flexural strength of 1640 MPa and modulus of elasticity of 32 GPa.For producing deflection of 0.25 and 0.50 mm, the mean loading force was higher for NiTi alloys. Although being increasingly used these days, NiTi alloys have limited use as compared with CoCr alloys due to high cost of titanium and certain other limitations.


PubMed | All India Institute of Medical Sciences and Shree Bankey Bihari Dental College
Type: Journal Article | Journal: Journal of oral biology and craniofacial research | Year: 2015

To retrospectively evaluate neurosensory disturbance (NSD) after bilateral sagittal split osteotomy (BSSO).A retrospective review was carried out to assess inferior alveolar nerve function in patients treated by BSSO from 2010 to 2013. All patients included in the study were assessed using objective (cotton swabs and pin prick testing) and subjective testing (questionnaire) for inferior alveolar nerve function after a minimum of 1 year of follow-up. Medical records of the patients were used to assess the incidence of NSD in the immediate post-operative period.15 patients (30 sides) had undergone BSSO during the specified time period. On subjective testing, NSD was reported in 22 operated sides (73.3%) in the immediate post-operative period, while 4 operated sides (13.3%) reported persistent NSD. On objective testing, immediate post-operative NSD was seen in 20 operated sides (66.7%). After a minimum of 1 year follow-up, recovery was seen in 18 operated sides while persistent NSD was seen in 2 operated sides (6.7%).NSD of the inferior alveolar nerve is a common complication after BSSO in the immediate post-operative period. However in a long term, nerve function usually recovers.

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