objectives: microleakage is the main concern in composite restorations. this study aimed to compare the microleakage of two bulk-fill and one conventional composite at two different time points. methods: class ii cavities were prepared in 60 premolar teeth and divided into six groups of 20. groups 1 and 4 were incrementally filled with grandio composite. groups 2 and 5 were filled with x-tra fi...

introduction: treatment in chronic constipation is highly dependent on colon transit time (ctt), which not only determines the cause but also determines the correct treatment policy. the aim of this study was evaluation of ctt in constipated patients. methods: 43 patients with chronic constipation who did not respond to high fiber diet were enrolled in the study. patients with history of drug i...

the gastric cancer in iran is the fourth in the general population. this study was designed to determine the five-year survival rate of gastric cancer patients, and to assess its associated factors. we analyzed the data using a time-dependent covariates model, and recommend it for analyses of similar data. 281 gastric cancer patients with adenocarcinomatous pathology who had been operated on at...

soil infiltration characteristics affect the design, evaluation and management of furrow irrigation over afield. on the other hand, different variables influence furrow infiltration, making infiltration modeling for afield a complex process. this study was conducted to investigate the direct and indirect effects of allvariables affecting furrow infiltration. the blocked furrow method was used t...