Mohammed Tahir - Academia.edu (original) (raw)

Papers by Mohammed Tahir

Background and Aim: The very idea of creating an artificial denture in an edentulous patient is b... more Background and Aim: The very idea of creating an artificial denture in an edentulous patient is based on various parameters surrounding the orofacial region. The positioning of the teeth on the alvelolar ridge depends on several factors and the “neutral zone” is one of the prime among them. The present study was aimed at recording the location of neutral zone and its relationship to the crest of the alveolar ridge in relation to the period of edentulousness (Less or more than one year duration). After recording the neutral zone in the mandibular arch using low fusing greenstick compound, two different gauges of wire 30 and 28 were adapted on the crest of the alveolar ridge and on the centre of the physiologicaly moulded greenstick compound respectively. An occlusal radiograph of the recording base and the cast was made and the radiographic images of both the wires were correlated followed by a statistical analysis. The study showed that the position of the neutral zone in relation t...

Journal of clinical and diagnostic research : JCDR, 2016

Unlike some vertebrates and fishes, humans do not have the capacity for tooth regeneration after ... more Unlike some vertebrates and fishes, humans do not have the capacity for tooth regeneration after the loss of permanent teeth. Although artificial replacement with removable dentures, fixed prosthesis and implants is possible through advances in the field of prosthetic dentistry, it would be ideal to recreate a third set of natural teeth to replace lost dentition. For many years now, researchers in the field of tissue engineering have been trying to bioengineer dental tissues as well as whole teeth. In order to attain a whole tooth through dental engineering, that has the same or nearly same biological, mechanical and physical properties of a natural tooth, it's necessary to deal with all the cells and tissues which are concerned with the formation, maintenance and repair of the tooth. In this article we review the steps involved in odontogenesis or organogenesis of a tooth and progress in the bioengineering of a whole tooth.

The Journal of Indian Prosthodontic Society, 2012

Advances in Intelligent Systems and Computing, 2012

Attention has been drawn to mobile devices, which show that the success will be the portability o... more Attention has been drawn to mobile devices, which show that the success will be the portability of applications from one platform to the other. With integration of 3D virtual objects into real environment in real time thus allowing student to relate with their physical environment and also making the subject more interesting. This study carry out based on the understanding of different types of learning theories, concept of mobile learning and mobile augmented reality and discusses how applications using these advanced technologies ...

Polymer Testing, 1987

Abstract Measurements of the stress relaxation of rubbers in compression have been made routinely... more Abstract Measurements of the stress relaxation of rubbers in compression have been made routinely for many years. Hitherto, however, data for the tangent modulus at a compressive strain level of 25% for various times under load have not been generally available. The ratio of the modulus after compression to the initial tangent modulus at 25% strain defines the modulus enhancement factor, MEF. With the development of new equipment in the Institute of Polymer Technology, this situation has now changed, and numerous reliable data for stress relaxation, SR, and MEF are becoming available. MEF must offer further information about the network, but the interpretation of the MEF results lags behind our capability of generating them. The effects of the important variables, time and temperature, on SR and MEF have been investigated; additionally antioxidant content, filler content, mechanical conditioning, water immersion and exposure in nitrogen have been included in the programme. A possible connection between MEF and hysteresis has been explored. Some measurements of the swelling in toluene of natural rubber compounds, and of the effect of prolonged compression on the swelling, have given unexpected results, especially that at high temperature, 100°C, the course of relaxation and the final dimensions after compression and swelling are the same for air and nitrogen environments.

Current rheumatology reviews, Jan 29, 2017

Rapid diagnosis of septic arthritis from Gram-stain microscopy is limited by an inherent false-ne... more Rapid diagnosis of septic arthritis from Gram-stain microscopy is limited by an inherent false-negative rate of 25-78%. The presence of concomitant crystal arthritis in 5% of cases represents a particular diagnostic challenge. This study aims to investigate the effects that a concomitant crystal arthropathy have on the ability of Gram-stain microscopy of synovial fluid to diagnose a septic arthritis. This is a 12-year retrospective cohort study. Inclusion criteria were a positive synovial fluid culture result with a positive clinical diagnosis of septic arthritis. Results were correlated with presence or absence of urate and calcium pyrophosphate crystals, and Gram-stain result. During this time our collection and analysis methods remained unchanged. All samples were collected in Lithium Heparin containers. Chi-squared test with a p value < 0.05 was considered significant. 602 synovial fluid samples were included. 162 cases of concomitant crystal arthritis were identified (27%). ...

Background and Aim: The very idea of creating an artificial denture in an edentulous patient is b... more Background and Aim: The very idea of creating an artificial denture in an edentulous patient is based on various parameters surrounding the orofacial region. The positioning of the teeth on the alvelolar ridge depends on several factors and the “neutral zone” is one of the prime among them. The present study was aimed at recording the location of neutral zone and its relationship to the crest of the alveolar ridge in relation to the period of edentulousness (Less or more than one year duration). After recording the neutral zone in the mandibular arch using low fusing greenstick compound, two different gauges of wire 30 and 28 were adapted on the crest of the alveolar ridge and on the centre of the physiologicaly moulded greenstick compound respectively. An occlusal radiograph of the recording base and the cast was made and the radiographic images of both the wires were correlated followed by a statistical analysis. The study showed that the position of the neutral zone in relation t...

Journal of clinical and diagnostic research : JCDR, 2016

Unlike some vertebrates and fishes, humans do not have the capacity for tooth regeneration after ... more Unlike some vertebrates and fishes, humans do not have the capacity for tooth regeneration after the loss of permanent teeth. Although artificial replacement with removable dentures, fixed prosthesis and implants is possible through advances in the field of prosthetic dentistry, it would be ideal to recreate a third set of natural teeth to replace lost dentition. For many years now, researchers in the field of tissue engineering have been trying to bioengineer dental tissues as well as whole teeth. In order to attain a whole tooth through dental engineering, that has the same or nearly same biological, mechanical and physical properties of a natural tooth, it's necessary to deal with all the cells and tissues which are concerned with the formation, maintenance and repair of the tooth. In this article we review the steps involved in odontogenesis or organogenesis of a tooth and progress in the bioengineering of a whole tooth.

The Journal of Indian Prosthodontic Society, 2012

Advances in Intelligent Systems and Computing, 2012

Attention has been drawn to mobile devices, which show that the success will be the portability o... more Attention has been drawn to mobile devices, which show that the success will be the portability of applications from one platform to the other. With integration of 3D virtual objects into real environment in real time thus allowing student to relate with their physical environment and also making the subject more interesting. This study carry out based on the understanding of different types of learning theories, concept of mobile learning and mobile augmented reality and discusses how applications using these advanced technologies ...

Polymer Testing, 1987

Abstract Measurements of the stress relaxation of rubbers in compression have been made routinely... more Abstract Measurements of the stress relaxation of rubbers in compression have been made routinely for many years. Hitherto, however, data for the tangent modulus at a compressive strain level of 25% for various times under load have not been generally available. The ratio of the modulus after compression to the initial tangent modulus at 25% strain defines the modulus enhancement factor, MEF. With the development of new equipment in the Institute of Polymer Technology, this situation has now changed, and numerous reliable data for stress relaxation, SR, and MEF are becoming available. MEF must offer further information about the network, but the interpretation of the MEF results lags behind our capability of generating them. The effects of the important variables, time and temperature, on SR and MEF have been investigated; additionally antioxidant content, filler content, mechanical conditioning, water immersion and exposure in nitrogen have been included in the programme. A possible connection between MEF and hysteresis has been explored. Some measurements of the swelling in toluene of natural rubber compounds, and of the effect of prolonged compression on the swelling, have given unexpected results, especially that at high temperature, 100°C, the course of relaxation and the final dimensions after compression and swelling are the same for air and nitrogen environments.

Current rheumatology reviews, Jan 29, 2017

Rapid diagnosis of septic arthritis from Gram-stain microscopy is limited by an inherent false-ne... more Rapid diagnosis of septic arthritis from Gram-stain microscopy is limited by an inherent false-negative rate of 25-78%. The presence of concomitant crystal arthritis in 5% of cases represents a particular diagnostic challenge. This study aims to investigate the effects that a concomitant crystal arthropathy have on the ability of Gram-stain microscopy of synovial fluid to diagnose a septic arthritis. This is a 12-year retrospective cohort study. Inclusion criteria were a positive synovial fluid culture result with a positive clinical diagnosis of septic arthritis. Results were correlated with presence or absence of urate and calcium pyrophosphate crystals, and Gram-stain result. During this time our collection and analysis methods remained unchanged. All samples were collected in Lithium Heparin containers. Chi-squared test with a p value < 0.05 was considered significant. 602 synovial fluid samples were included. 162 cases of concomitant crystal arthritis were identified (27%). ...