Journal of Dental Medicine

Background and Aims: The Panoramic radiography is one of the routine techniques in implant imaging. Although there are some limitations with this technique, panoramic radiography is radiographic choice for basic evaluation for implant treatment. Many studies have been designed to determine magnification in panoramic images but most of them were performed on dry skulls or radiographic phantoms. In recent studies CT or CBCT are used as gold standard. The aim of this study was to determine vertical magnification of panoramic images using renovated CT sections in anterior and posterior regions of both jaws.

Materials and Methods: 30 panoramic radiographs (Planmeca EC or CC Proline) were selected from patients of implant department and Particular anatomic landmarks were selected in those images. Vertical dimensions of these landmarks were measured in both panoramic and renovated cross sectional CT images by a digital caliper and vertical magnification was calculated as the ratio of image dimensions to the real dimensions.

Results: The mean vertical magnification of panoramic radiographs in anterior and posterior maxillae were 1.22±0.02 and 1.16±0.02, respectively. The mean vertical magnification of panoramic radiograph in anterior and posterior mandible were 1.20±0.02 and 1.13±0.02, respectively. The differences between magnification in mandible and maxillae were significant (P<0.001). The differences between magnification in anterior and posterior regions of both jaws were not significant (P=0.11).

Conclusion: Vertical magnification of panoramic images (Planmeca EC or CC Proline) in different regions in both jaws were between 1.13 to 1.22.

  Background and Aims : As midwives are in frequent contact with pregnant mothers, they may play a key role in their oral health care (OHC). In this study, we aimed to evaluate the effect of an educational program on Tehran University of Medical Sciences midwifery students’ knowledge and preparedness on OHC in pregnant mothers. Materials and Methods: The midwifery third year students of central campus (n=29) were randomly selected as intervention group and their counterparts in Hemmat campus (n=33) as control. Students in both groups were asked to fill in a questionnaire included 8 demographic question and 18 OHC knowledge and one question on their preparedness to implement OHC. Then the educational intervention was implemented using lecture, demonstration of the correct methods of brushing and flossing on the models and role play method. The follow- up questionnaire was delivered 3 months later. Data were analyzed using Mann-Whitney test, T-test, Chi-Square test, ANOVA and Regression by SPSS software.

  Results: The mean OHC in pregnancy knowledge score in intervention and control group were 26.7 and 24.8 at baseline which were changed into 48.5 and 29.1, respectively (P<0.001). Among the students 52.6% in the intervention group and 36.4% in the control group reported very high preparedness to implement OHC in pregnancy. These figures were 68.2% and 41.7% in the post-test.

  Conclusion: The promising findings of this educational intervention comprising of both student and teacher-centered methods speak for possibility of improving these students knowledge and preparedness and implies on the necessity to incorporate the related course in midwifery education.