ABSTRACT
Florid cemento-osseous dysplasia clearly appears to be a form of bone and cemental dysplasia which is limited to jaws. Fcod is more common in middle aged black women [3]. In some cases, the lesion is totally asymptomatic and is found when radiography is performed for other purpose. Radiographically this lesion occurs in two or more quadrants as multiple masses with noticeable tendency for bilateral and usually in tooth bearing regions. We present two rare cases of Floride cement-osseous dysplasia. The first case occurs in a 20 and second in a 25 years old Persian woman that is rare with regard to this race and sex
Subject(s)
Humans , Female , Osteomyelitis , Cementoma , Radiography, Panoramic , Racial GroupsABSTRACT
The aim of this in vitro study was to assess the shear bond strength of amalgam to dentin using four dentin adhesive systems. One hundred human molars were selected. After enamel removal, a dentin cylinder with 3 mm thickness was prepared. Eighty specimens were resorted with amalgam and four dentin adhesive systems as follows [n=20]: group 1, Scotch Bond Multi-Purpose; group 2, One Coat Bond; group 3, PQ1; and group 4, Panavia-F. In group 5, 20 specimens were resorted with amalgam and varnish as control group. The specimens were incubated at 37[degree]C for 24 h. The shear bond strengths were then measured by using push out method. The data were analyzed by one-way ANOVA and post hoc Duncan's tests. Mean values for bond strengths of test groups were as follows: group 1=21.03 +/- 8.9, group 2=23.47 +/- 9, group 3=13.16 +/- 8.8, group 4=20.07 +/- 8.9 and group 5=14.15 +/- 8.7 MPa +/- SD. One-way ANOVA showed the statistically significant difference between the bond strengths of five groups [P=0.001]. Post hoc Duncan's test showed significant difference between groups 1and 3 [P=0.008], groups 1 and 5 [P=0.019], groups 2 and 5 [P=0.008], groups 4 and 5 [P=0.042], and groups 3 and 4 [P=0.018]. Results of this study showed that the bond strength of amalgam to dentin using One Coat Bond as dentin adhesive system was higher than that observed in other dentin adhesive systems.
ABSTRACT
Leukoedema is a chronic condition of the oral mucosa with an unknown etiology; its prevalence has been reported differently in different studies. The aim of this study was to determine the relative frequency of leukoedema and the associated risk factors in patients referring to the Department of Oral Medicine in Isfahan Faculty of Dentistry. In this prospective-descriptive study, the oral mucosa of 404 patients referring to the Department of Oral Medicine was examined. Data on smoking, unusual habits [cheek biting and use of hot drinks] and systemic diseases were recorded based on a checklist. Data was analyzed by chi-squared test and Fisher's test using SPSS program [alpha = 0.05]. The relative frequency of leukoedema was 23%. Mean age of the subjects was 31.56%. There was a significant relationship between the relative frequency of leukoedema and smoking, cheek chewing and habitual drinking of hot liquids [p value < 0.001] In addition, a significant relationship was observed between leukoedema frequency and anemia [p value = 0.022]. Leukoedema was more prevalent in male, in 20-39 age group, and anemic patients. Habitual cheek chewing and hot drinks were risk factors for leukoedema. Smoking seems to have the greatest role in leukoedema, intensifying the effect of other factors