Provisionalization Autopolymerizing resins Abutment preparationsRemaining dentine thickness a b s t r a c t Background: Resin materials used in the fabrication of direct provisional restoration exhibit an exothermic reaction and the extent of damage may also depend on the remaining dentine thickness. An ex-vivo study was envisaged to compare the time related temperature changes in the pulp chamber during the fabrication of fixed partial denture provisional restorations using direct technique. The effect of differently prepared teeth (with varying remaining dentine thickness) on the above mentioned temperature changes were also evaluated.Methods: Thermal changes were calculated in pulp chamber of three differently prepared tooth having different amount of remaining dentinal thickness (45 samples) and control with no tooth media (15 samples), using three different types of autopolymerizing provisional restorative materials using Cr/Al thermocouple connected to digital thermometer.Results: The data for the mean peak temperature rise was subjected to one way ANOVA analysis for relative comparison among subgroups within each main group and across the main groups. The results showed a statistically significant difference across both the subgroups and the main groups ( p < 0.001). Then Turkey HSD test was applied to determine the significance of statistical difference between the means, within the groups. The differences in temperature rise were statistically significant for the three resins ( p < 0.001).Conclusion: Polymethylmethacrylate (DPI) showed the highest temperature rise value followed by polyethyl methacrylate (Tempron) and Bis-acrylate composite (CoolTemp). The maximum temperature rise was found on molar full veneer preparation followed by molar three quarter preparation and premolar three quarter preparation. Data and results from current study may assist clinicians to select an autopolymerizing provisional restorative resin when employing direct technique of fabricating provisional restorations for a specific tooth preparation which would cause minimal thermal trauma to pulpal tissue. ª
Healthy jawbones ensure better tooth anchorage and the ability to masticate and maintain metabolism. This is achieved by a delicate balance between bone formation and resorption in response to functional demands. An imbalance in the expression of receptor activator of nuclear factor kappa-B (RANK) ligand (RANKL) and osteoprotegerin (OPG) or osteoclastogenesis inhibitory factor (OCIF) is believed to be the underlying mechanism of osteolysis in metastases, multiple myelomas, and cancer therapy-induced bone loss in patients. Considered mainly as bone-specific agents to treat postmenopausal osteoporosis, bisphosphonates, in combination with certain chemotherapeutic agents have proved to be effective in prevention of tumor formation and metastatic osteolysis in bone tissue. Osteonecrosis of the jaws associated with them has, however, been of grave concern to the prosthodontist, as it predisposes patients to a bone-deficient basal seat for dental prostheses. This manuscript reviews available information over the past 13 years on possible mechanisms of bone loss, bisphosphonate-induced osteonecrosis of jaw bones, and prosthodontic concerns.
Ectodermal dysplasia is a hereditary disease characterized by congenital dysplasia of one or more ectodermal structure and other accessory appendages. The oral manifestations are anodontia and poor bony foundation which impairs both esthetic as well as the masticatory function. The prosthodontic management of patients with such dysplastic condition necessitates a multidisciplinary approach. This case report describes the prosthodontic oral rehabilitation of a 16 years old female pediatric patient with ectodermal dysplasia.How to cite this article: Singh T, Singh R, Singh GP, Singh JP. Hypohidrotic Ectodermal Dysplasia: A Felicitous Approach to Esthetic and Prosthetic Management. Int J Clin Pediatr Dent 2013;6(2):140-145.
Introduction: Use of autopolymerising resin for direct provisionalization is one of the commonest methods employed by clinicians. However, these materials exhibit an exothermic reaction and are prone to cause pulpal damage. Thus, a combination of cooling technique and matrix material to reduce the quantum of heat transferred to a healthy vital pulpal tissue may be employed for minimal tissue damage. An ex-vivo study was thus envisaged to compare the efficacy of various matrix materials and cooling techniques on time related temperature changes in the pulp chamber during the fabrication of provisional FPD restorations using direct technique. Material and Methods: A total of 100 provisional restorations were fabricated and were grouped on the basis of three different matrices: Vacuum template, Putty index and Alginate index and further subgrouped on the basis of various cooling techniques employed. Thermal changes in the pulp chamber was evaluated using Cr/ Al thermocouple placed in the pulp chamber of a prepared tooth and connected to a digital thermometer. Intrapulpal temperature variations were recorded, tabulated and statistically analysed. Results: The inter-group and intra-group statistical comparisons of continuous variables were done using analysis of variance with Bonferroni's correction for multiple group comparisons considering the independent study groups. The underlying normality assumption was tested before subjecting each variable to t test and ANOVA. In the entire study, the p-values less than 0.05 were considered to be statistically significant. All the hypotheses were formulated using two tailed alternatives against each null hypothesis (hypothesis of no difference). The entire data was statistically analysed using Statistical Package for Social Sciences (SPSS ver 21.0, IBM Corporation, USA) for MS Windows. Conclusion: The order of heat dissipation for the different matrices used is as follows: Irreversible hydrocolloid matrix > PVS putty matrix > vacuum form template. It was concluded that intrapulpal temperature rise during the direct fabrication of provisional restorations can be limited by employing different cooling techniques. "Cooling" of PVS putty and alginate impression index for 2 minutes in refrigerator (Ambient temperature 10-12 0 C) was found to be most effective "cooling" method for preventing temperature rise in pulp.
Background: A better knowledge about the Interdental space is important since it provides insights on the prevalence of malocclusion. To date, there is conflicting evidence on the impact of body mass index (BMI) and Socioeconomic status (SES) on interdental space. A recent review concluded that a greater understanding is required of the interdental space. Therefore, there is a need for a more comprehensive and rigorous assessments of the interdental space and impacts of BMI and SES.Aim: BMI and SES can be associated with the interdental spacing in deciduous dentition.Design: The present cross-sectional study was carried out on 448 children of age group of 3 to 5 years out of which 392 were meeting our criteria. Research assessment questionnaire on demographic data was completed by the parents. Study model cast of 392 children free from malocclusion were analyzed.Results: A statistically significant association between interdental spacing and BMI category was observed. Comparison of BMI with above threshold interdental space revealed that after an optimum weight there is no effect on interdental space.A significant association between SES and interdental spacing was observed for all the four locations (p < 0.01).Conclusion: Evolved normative value can be taken as a standard and the occlusion and interdental spaces are not two completely separate entities and they are interdependent.How to cite this article: Singh T, Singh R, Singh JP. Classification of Interdental Space for Different Quadrants on the Basis of Standardization through Threshold Data and Its Comparison with BMI and Socioeconomic Status. Int J Clin Pediatr Dent 2013;6(1):16-21.
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