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Knowledge, attitude and practice of dentists regarding provisional restorations: A cross sectional study

S22 The Journal of Indian Prosthodontic Society | Volume 20 | Supplement 1 | December 2020 Results: Highest stresses of 4.18 MPa (under unilateral loading) and 4.2 MPa (under bilateral loading) were observed in implants at 20 mm distance. All other implant positions showed stresses less than 2.46 MPa indicating increasing trend in stresses with increase in the distance. Highest stresses of 0.93 (unilateral loading) and 0.92 MPa (bilateral loading) were observed with implants at 15/15-degree angulations. For lesser angulations, the stresses were ranging from 0.05 to 0.87 MPa on implants. Conclusions: Implants placed more posteriorly exhibit higher stresses compared to implants placed more anteriorly. Implants placed with greater angulations displayed higher stresses than implants placed with lesser angulations. DOI: 10.4103/0972-4052.306372 Knowledge, attitude and practice of dentists regarding provisional restorations: A cross sectional study Dr. Saee Deshmukh, Dr. Karan Jaiswal VSPM Dental College and Research Centre, Nagpur Introduction: The importance of provisional restorations in fixed partial denture can not be overemphasized. At the same time it is very important to understand the dentists’ opinions and practices regarding the same. Methodology: A descriptive cross-sectional study was done amongst the dental practitioners of Nagpur region in 2019. A questionnaire with total 11 questions including open and multiple-choice type was designed and validated by experts in the field. It was circulated using Google forms as well as printed version to a total of 100 dentists selected randomly from private dental clinics and dental institutes. Data from the completed questionnaires were analysed using the SPSS Statistical Software Package (version 25). Data was expressed in terms of frequencies. Results: The response rate was 79%. In the given sample, 81% of dentists preferred giving provisional restorations in selected cases. 68% of them give provisionals in special cases like full mouth rehabilitation and laminates. Out of these, 61% use self polymerized acrylic resin, 34% use bis-acryl composite resin (Protemp IV,3M) and 5% use heat polymerized resin as material of choice. 46% use indirect technique, 20% use direct technique and the rest use combination technique. Gingival inflammation was most commonly encountered problem by 51% of the dentists. 54% of the dentists preferred to give the provisionals for a period of 7-15 days. Only 23% felt the need to perform diagnostic wax up prior to giving provisionals. Conclusion: In the given set of participants the level of knowledge and practices regarding provisionalization in fixed prosthodontics was found to be satisfactory. However, to make them more proficient continuing dental education programmes on recent advances in terms of newer materials and techniques should be conducted. DOI: 10.4103/0972-4052.306373 Comparative evaluation of flexural strength of 8 heat cured PMMA denture base resin reinforced with different concentrations of silanized TiO2 nanoparticles – An in vitro study


Introduction:
The importance of provisional restorations in fixed partial denture can not be overemphasized. At the same time it is very important to understand the dentists' opinions and practices regarding the same.

Methodology:
A descriptive cross-sectional study was done amongst the dental practitioners of Nagpur region in 2019. A questionnaire with total 11 questions including open and multiple-choice type was designed and validated by experts in the field. It was circulated using Google forms as well as printed version to a total of 100 dentists selected randomly from private dental clinics and dental institutes. Data from the completed questionnaires were analysed using the SPSS Statistical Software Package (version 25). Data was expressed in terms of frequencies.
Results: The response rate was 79%. In the given sample, 81% of dentists preferred giving provisional restorations in selected cases. 68% of them give provisionals in special cases like full mouth rehabilitation and laminates. Out of these, 61% use self polymerized acrylic resin, 34% use bis-acryl composite resin (Protemp IV,3M) and 5% use heat polymerized resin as material of choice. 46% use indirect technique, 20% use direct technique and the rest use combination technique. Gingival inflammation was most commonly encountered problem by 51% of the dentists. 54% of the dentists preferred to give the provisionals for a period of 7-15 days. Only 23% felt the need to perform diagnostic wax up prior to giving provisionals.

Conclusion:
In the given set of participants the level of knowledge and practices regarding provisionalization in fixed prosthodontics was found to be satisfactory. However, to make them more proficient continuing dental education programmes on recent advances in terms of newer materials and techniques should be conducted.  Comparative evaluation of flexural strength of 8 heat cured PMMA denture base resin reinforced with different concentrations of silanized TiO 2 nanoparticles -An in vitro study

VSPM Dental College and Research Centre, Nagpur
Introduction: Polymethyl methacrylate (PMMA) is the most frequently used material in denture fabrication. Down side of PMMA dentures is it breaks within a few years after fabrication [4] such dentures flex in the mouth during chewing and due to repeated small loadings during mastication lead to the midline fracture due to poor flexural strength of denture base resin. The purpose of this study was to find out the effect on flexural strength of heat cured PMMA denture base material after incorporation of 1%, 3%, and 5% by weight of silanized titanium dioxide (TiO2) nanoparticles.

M a t e r i a l s a n d M e t h o d s :
F o r t e s t s a m p l e s preparation, TiO2 nanoparticles were coated with a trimethoxysilylpropylmethacrylate (TMSPM) before sonicated in monomer with the percentages 1%, 3%, and 5% by weight; after sonication it was mixed with PMMA powder using conventional denture fabrication procedure. Then total 60 samples for study was prepared; 15 samples for each four groups, i.e. that is one control group and three experimental groups. First control group was prepared from PMMA without incorporation of TiO2 nanoparticles, the second group with the incorporation of 1 wt% TiO2 nanoparticles, the third group with 3 wt% TiO2 nanoparticles, and the fourth group with 5 wt% TiO2 nanoparticles. Flexural strength test was then conducted on each sample.

Results:
Each group was evaluated for Flexural strength test, and it was found that increasing the wt% of nanoparticles, there was a significant increase in flexural strength of PMMA denture base resin. P value suggested that the difference of mean percent increase across all groups was statistically significant with p < 0.05.