Aims: A premolar, a lower premolar with a class II cavity filled with bulk resin and a lower premolar with a class II cavity filled with nanocomposite resin were prepared using an incremental technique. Introduction: The selection of restoration material in dentistry represents a challenge to obtain successful treatment. The biomechanical properties of composites influence the longevity of a restoration. Methods: Three situations were simulated for each of the tested models by means of the three-dimensional finite element method: 1. Mastication (200 N axial force) in the functional area of the occlusal faces; 2. Swallowing (axial force 200 N) at 5 stable points on the occlusal faces; and 3. Deflection (600 N horizontal force) at 1 point of the vestibular cusp. Results: The bulk resin obtained a better stress distribution under chewing, swallowing and deflection forces than the nanocomposite resin. Conclusion: The hypothesis was verified: the premolar tooth with cavity class II filled with bulk resin showed lower stress than the premolar tooth with cavity class II filled with nanocomposite resin

Background: Abdominal wound dehiscence is a common complication of Midline laparotomy in Indian setup. The present study was done to find out the rate of abdominal wound dehiscence by using continuous suture technique in closure of rectus sheath after midline laparotomies. Material & Method: This cross sectional study was conducted on 100 patients undergoing midline laparotomy in the Department of General Surgery, Indira Gandhi Medical College, and Shimla from June 2018 to December 2019. Patients were selected who require midline laparotomy either as emergency or elective procedure. The patients underwent closure of rectus sheath with conventional continuous closure technique with polydioxanone No 1 (PDS) suture. Results: In this study there were 79(79%) males and21 (21%) females. The age of the patients varied from 18–75 years with a mean age 47.08 years and SD ± 15.81. In current study the common indication of midline laparotomy was hollow viscus perforation and D1 perforation i.e perforated duodenal ulcer was the most common indication. It was observed that out of total 100 patients who underwent continuous closure technique, 32 (32%) patient developed wound dehiscence. Maximum wound dehiscence occurred in the age group of 56-65 year age group 9 (28.13%) followed by 36-45 age group 7(21.88%). Conclusion: The present study reported high incidence of wound dehiscence after using Continuous Suture Technique in Midline Laparotomy. Patients with age group of 56-65 years found to have highest incidence of abdominal wound dehiscence. Most of wound dehiscence occurred from 5th to 10th post-operative day.