Education
Saeedeh Mokhtari; Alireza Heidari; Milad Zarei
Abstract
Aim: Dentistry is a stressful profession, and dental students are susceptible to different forms of stress and psychological pressures. Investigating the amount of this stress and knowing the sources that cause it, can help in creating a supportive and stress-reducing educational environment.
Methods: ...
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Aim: Dentistry is a stressful profession, and dental students are susceptible to different forms of stress and psychological pressures. Investigating the amount of this stress and knowing the sources that cause it, can help in creating a supportive and stress-reducing educational environment.
Methods: Fifty-nine senior dental students of Tehran Faculty of Dentistry participated in this cross-sectional descriptive study. The data was collected by DASS-21 questionnaire using a 4-scale measure. The total stress scores of the students were calculated at the clinical departments of the Dental School. The severity of depression, anxiety, and stress was calculated for the students. The comparison of the total stress scores at different departments was made by ANOVA, and the effect of demographic factors on predicting the stress scores was determined by linear regression analysis. P-values <0.05 were considered as significant.
Results: Among the total participants, 72.9% (n=43) showed different levels of depression; 57.7% (n=34) had different levels of anxiety and 64.3% (n=38) exhibited different levels of stress. The total stress scores of the students were mostly reported in the endodontics (12.59, P<0.05) and oral medicine (9.2, P<0.05) departments, while the least total scores were found in the orthodontics (3.89, P<0.05) and oral and maxillofacial surgery (4.25, P<0.05) departments.
Conclusion: The senior dental students in Tehran University of Medical Sciences have high levels of depression, anxiety, and stress. The highest levels of stress were related to the departments of endodontics and oral medicine among the educational departments. It appears that dental students living away from their families and the students whose mothers have high educational levels require further support in this respect.
Parham Pedram; Hannane Ghadirian; Sepideh Arab
Abstract
Background: Splinting anterior teeth is a way to fix them after orthodontics treatments. Occlusal trauma from functional or parafunctional forces can cause stress increase and movements of teeth especially while having bone loss.
Methods: Six anterior teeth with different bone levels were designed in ...
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Background: Splinting anterior teeth is a way to fix them after orthodontics treatments. Occlusal trauma from functional or parafunctional forces can cause stress increase and movements of teeth especially while having bone loss.
Methods: Six anterior teeth with different bone levels were designed in SolidWorks (2010), the models were then transferred to ANSYS Workbench 12.1. The models were loaded with 187 N force on the incisal edges of two incisors. Results: Stress on canine was 0.45 MPa in normal bone height and increased to 0.60 MPa in five millimeters of anterior teeth bone loss. Labial displacement was less in normal alveolar bone height while it was increased in all those teeth with five millimeter of bone loss.
Conclusions: Splinting distribute the forces between teeth and the stress production on canine increase while it splinted with low level bone incisors. Anterior teeth also showed tipping movements in reply to increased forces.
Allahyar Geramy; Amir hooman Sadr Haghighi; Saeede Mokhtari Khoee
Abstract
Aim: Orthodontic treatment outcomes are combination of advantages and disadvantage. The force implied during treatment could affect dental pulp status. Amount of changes in pulp complex depend on the types of tooth movements and whether the apex is open or not. The aim of this study is to compare the ...
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Aim: Orthodontic treatment outcomes are combination of advantages and disadvantage. The force implied during treatment could affect dental pulp status. Amount of changes in pulp complex depend on the types of tooth movements and whether the apex is open or not. The aim of this study is to compare the effects of different orthodontic tooth movements in two kinds of open and normal apices by 3D Finite element analysis.
Materials and Methods: Two three-dimensional Finite element models of an upper central incisor were modeled based on average dimensions. The models contained cortical and spongy bone, uniform thickness PDL of 0.25 mm and an upper central incisor. The differences between the models was the apex development which was complete in the first model and open in the second one in Solid- works 2006 and transferred to ANSYS Workbench Ver. 11.0. Different force systems to produce tipping, bodily and intrusion were applied in the tooth crown. The Von Mises stress was assessed along two defined paths.
Results: Maximum amount of the stress along the long axis of pulp belonged to open apex by tipping movement then intrusion with normal apex and finally bodily movement in open apex samples. In evaluation as regard of stress along apical third of PDL the highest stress created by intrusion in normal apex group.
Conclusion: In open apex, tipping and bodily movement could induce much more stress and in normal apex the concern of root resorption by intrusion was more than other types of tooth movements.
