Background: Dentistry can be an overstressed career. Dentists come across countless routes of stress in dental schools. Onset foot in clinical training, they can find that the number and type of stressors often grow. Dental students encounter high levels of academic stress, which can adversely influence them from their study years working with phantom teeth through their preclinical and clinical practice years. The COVID-19 pandemic has revealed the world population to a high risk of infection that comprises a major stress factor, especially for vulnerable groups such as dental students. Objective: The objective of this study was to assess the levels of COVID-19-related stress and anxiety, changes in hygienic and social habits, as well as subjective worries regarding the dental profession among dental students. Materials and Methods: A self-structured questionnaire was sent to dental students of two dental schools in the city of Jeddah. It included demographic data, questions about the level of change in personal hygiene and social habits, students' perception about the sufficiency of information received during the outbreak and its source, subjective worries regarding the dental profession, and the Generalized Anxiety Disorder 7-item Scale. Three hundred and eight responses were received. Results: Moderate and severe anxieties were reported in 41% and 7% of students, respectively. About 57% of respondents agreed to continue e-learning in the theoretical part only, 1% for the clinical part only, 32% in both, and 10% were not interested in continuing e-learning. Most of the students reported that they received excellent information about COVID-19 during the outbreak, with social media as the main source of information for the majority, followed by the Health Department. A significant number of dentists (66%) wanted to temporarily shut their dental practices until the number of COVID-19 case rates reduces considerably. Conclusion: A considerable percentage of dental students are anxious and changed their hygienic and social habits due to COVID-19. This anxiety reflects worries about the dental profession in one-third of participants that necessitate counseling services and psychological support.
Aim of the study: to compare complete denture with implant supported overdenture regarding occlusion and disocclusion time using a T scan. Materials and methods:A crossover clinical trial was adopted,50 patients were selected for this study. The assessment was carried out with conventional complete dentures and then with the same dentures after loading of the implants. Computerized occlusal analysis using the T-Scan III system was conducted to perform baseline computer-guided occlusal adjustment for conventionally fabricated dentures. Recording of OT (occlusion time) and DT (Disocclusion time) right and left values using the T-Scan were subsequently carried out for all dentures, first without implants and then after implants loading. All T-Scan procedures were carried out by the same clinician.Results: Independent t test was used in this study because data was normally distributed. The OT values were recorded and a mean OT value was calculated for each subject, where the CD Complete denture group mean OT (0.49±(0.21)s which was about 0.13 s longer than the Implant Supported Over Denture(ISOD) mean OT (0.36±(0.19). The disocclusion time were for right 0.55± 0.25 for CD and 0.35± 0.32 for ISOVD, while on the left was 0.56±0.24 for CD and 0.37±0.27 for ISOVD. There were highly significant results between the two groups in Occlusion time and disocclusion RT and left 0.0016, 0.0007, 0.0003 respectively. Conclusion:Using the computerized analysis of the Occlusion Time, Implant supported over denture proved to be a better treatment option regarding occlusion and disocclusion time where timing decreased significantly after implant loading.
Aim of the study: Was to compare the accuracy of two different surgical techniques; free hand and partial limiting, regarding the accuracy of implant position. Materials and methods: Four edentulous dummy mandible simulating human edentulous mandible were used (the model material duplicates type II~III hardness). A surgical stent was fabricated. The surgical stent was secured on the first and second mandibles and all the implants were placed using the partial limit technique; where the initial drill was used first using the stent. The subsequent drills were used free hand. The same stent was placed on the other two mandibles where the position of the implants was delineated using a marker, then the implants were placed free hand. The angles between the long axis of preplanned and real implants were recorded from both the preoperative implant plan & the post-operative implant representations on the resliced CBCT image & were compared to each other in degrees. The linear deviation of the post-operative placement was recorded in mm in coronal & apical positions from the pre-planned implants in both Mesio-distal & Bucco-lingual aspects, also the vertical linear deviation (deviation in depth), was recorded apically, taking the pre-operative implant plan as the reference by the aid of the software matching function. Results : The data was collected and statistically analyzed. The mean angular deviation for group A the free hand was 3.71 ± 2.58 degree while that for group B partial limiting was 1.72 ± 1.67 degree, this difference was statistically significant P<0.05. The mean buccolingual deviation for group A was 0.79 ± 0.66mm, while that for group B was 0.27 ± 0.24 mm, this difference was statistically significant P<0.05. The mean Mesio distal deviation was 0.94 ± 0.75mm while that for group B was 0.37 ± 0.35mm, this difference was statistically significant P<0.05. For the mean apical deviation for group A it was 0.51 ± 0.48 mm and that for group B was 0.32 ± 0.32 mm and this was not statistically significant. P>0.05. There was statistical significance difference between both groups concerning the angular deviation, Bucco lingual deviation and Mesio distal deviation, while apical deviation was not significantly different. Conclusion: Partial limiting surgical stent is more precise than free hand surgical technique concerning the angular deviation, Bucco lingual deviation and Mesio distal deviation. There is no statistical significant difference concerning apical position.
Aim of the study: This study was conducted to assess the efficacy of different guided surgery protocols on mean marginal bone loss around implants in implant assisted mandibular over denture.Materials and methods: Twenty-one edentulous patients were selected for this study. They were randomly divided into three different groups. In the first group implants were placed by free hand technique. In the second group partial limiting surgical guide was used; the surgical guide was used for pilot drilling. In the third group completely limiting surgical guide was used; the surgical guide was used for the whole drilling sequence. Mean marginal bone loss was measured using CBCT at 6 months, 12month and 18 months interval. Results were collected and tabulated for statistical analysis.Results: One-way ANOVA test showed no statistical significance between the three groups in all time intervals. Conclusion:Within the limitation of this study, no statistically significant differences could be found between the guided groups and the free hand group at the 18 months follow-up period.
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