[Effect of three types of temporary luting agents and abutment surface sandblasting on retentive strength of implant supported fixed prostheses]

Achieving appropriate retention and easy irretrievability at the same time is challenging inimplant-supported fixed partial dentures [FPDs]. Researchers have always been in search of a temporary cement to improve the retentive strength.The aim of this in vitro study was to evaluate the effect of three different temporary cements and sandblasting of the abutment surface on the retentive strength of implant-supported fixed prostheses. In this experimental study, 10 DIO implant analogues were embedded in acrylic resin.Twenty abutments were divided into two groups of 10. The abutments in group one were used in their intact standard form while those in group two were sandblasted. Sixty metal copings were fabricated and cemented on abutments ofeach group using three types of temporary cements namely Kerr, Provy and GC. Specimens were subjected to auniversal testing machine to measure their retentive strength. The results were analyzed by Tukey's post-hoc test. The retentive strength of Temp Bond [Kerr] with sandblasted abutments was significantly higher than that ofthe other two cements [p<0.001]. In standard abutments, Provy had slightly but not significantly higher retentive strength. The lowest values in both abutment groups were obtained by GC cement. Kerr tempBond cement with sandblasted abutments yields the highest retentive strength

[Comparison the personality characteristics between male and female patients with irritable bowel syndrome [IBS]]

Irritable Bowel Syndrome [IBS] is the most common gastrointestinal disorder in clinical medicine, since it is not founded biological basis for it, role of psychological causes is investigated in creation of it. To compare the personality characteristics between three groups of patients with Diarrhea dominant, Constipation dominant and dominant of Altering type and investigating the gender, family background of IBS and length of illness. Eighty five patients were selected through temporal classical random method and included of 21 patients with Diarrhea dominant, 30 patients with Constipation dominant and 340 patient with Altering type]. Patients were diagnosed by a gastroenterologist and using the ROME criteria after clinical evaluation and endoscopy. Personality inventory [NEOPI-R] made by Mc Crue and Kosta containing big five personality factors was used for investigating the samples personality characteristics. Demographic characteristics and other groups were recognized by question made at the first of main questionnaire. The groups eperated of each other. Analysis of data indicated that there were no significantly differences between the personality characterisrics in three groups of patients. Extraversion was significantly higher in patients with family background of IBS and patients who had IBS more than six mounth and had reported stress gained higher score at neuroticism in comparison with patients who had IBS less than 6 month and had not report stress. Psychological factors participated at quality of illness experience. Neuroticism may be correlated with quality of illness experience [with stress and high length of illness]. Thus personality characteristics should be considred as an important factor in improvement of IBS patients by psychiatrics and specialists