Purpose
A questionnaire‐based study was conducted to understand the pros and cons of online education among undergraduate dental students across India. The study was also proposed to assess the mental and physical well‐being of the students amid the COVID‐19 pandemic lockdown.
Methods
A total of 533 undergraduate dental students across India participated in a cross‐sectional study by means of virtual survey. A self‐designed questionnaire was created using google forms. The questionnaire consisted of 25 questions and was divided into two parts, first, regarding the academic outcome of online dental education and second, psychological and physical well‐being of the students in reference to online dental education. A descriptive statistical analysis was done using IBM SPSS statistics software.
Results
In the present study, 91.6% students reported that the format of dental education was shifted to online lectures due to the COVID‐19 pandemic. 86.4% students suggested that they preferred offline lectures rather than online lectures. Psychological and physical well‐being were affected in both male and female students; however, male students were affected more significantly than females.
Conclusion
The study concluded that the education of dental students was adversely affected as a result of COVID‐19 pandemic. The physical and psychological well‐being of the students has also been affected, with males being affected in a higher proportion. The study concluded that the quality of online education should be enhanced and must be student centred to meet their education requirements. Also, there is a need of regular counselling and other measures to alleviate the students from the psychological stresses.
It was concluded that mobile dental clinics, dental camps, and prosthodontic outreach programs could be solutions to spread awareness and disseminate treatment.
Aims:The aim of the study was to evaluate the stress distribution patterns in teeth and supporting structures of fixed prosthesis and design modifications in a fixed prosthesis with either normal or reduced bone support of an additional abutment. Study was also undertaken to disprove Ante's law.Materials and Methods:Main models and variations of main models (modification 1, 2, 3, 4, 5, 6, 7, 8) were subjected to 200 N at angulations of 90° and 15° on functional cusps. Results for each loading were obtained as stress distribution color images and numerical values were recorded. A three-dimensional finite element analysis study of variations of normal models was performed using two finite element softwares, namely PRO-Engineer wildfire version 1.0 manufacturer: Parametric technology corporation, Needham, MA 02494 U.S.A.Results:When periodontal compromised abutment teeth was splinted with an additional abutment an increase of stress was observed in periodontally compromised abutments so an additional abutment is not required. Eventhough the pericemental area of compromised abutments with an additional abutment (canine) was more than the combined pericemental area of pontics to be replaced, stress generated was more on abutments. This disproves Ante's law. Hence, it may be a reference, but should not be the ultimate criterion in determining the number of multiple abutments.Conclusions:When periodontal compromised abutment teeth was splinted with an additional abutment an increase of stress was observed in periodontally compromised abutments so an additional abutment is not required. Even though the pericemental area of compromised abutments with an additional abutment (canine) was more than combined pericemental area of pontics to be replaced, stress generated was more on abutments. This disproves Ante's law. Hence, it may be a reference, but should not be the ultimate criterion in determining the number of multiple abutments.
Aim:We compared the clinical efficacy of three gingival displacement systems to accurately record intra-crevicular margins of tooth preparation.Materials and Methods:One mechanical (magic foam cord) and two chemico-mechanical (expasyl paste and retraction cord impregnated with 15% aluminum chloride) gingival displacement systems were used. This study was conducted on the maxillary central incisors of 20 patients (20-60 years old) requiring full coverage restoration. All the three gingival displacement systems were tested in three sessions at an interval of 14 days in same order. The casts were sectioned and viewed under an optical microscope, followed by quantitative measurements of the width of the pre and postretracted sulci.Results:All the three displacement systems produced highly significant horizontal gingival displacement. Retraction cord soaked in 15% aluminum chloride produced maximum displacement (0.74 mm), followed by expasyl paste (0.48 mm) whereas magic foam cord produced the least displacement (0.41 mm).Conclusions:Gingival displacement shown by each displacement system was found to be more than the accepted value necessary for elastomeric impression accuracy (0.2 mm) to record intra-crevicular margins of tooth preparation.
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