CLINICAL STUDY ON THE EFFECT OF VITAPEX UPON THE PERIAPICAL TISSUE
The purpose of this study was to evaluate the effects of Vitapex on the periapical lesions. Thirteen single-rooted teeth from ten patients who visited the SNU hospital were endodontically treated with Vitapex and Gutta percha cone, and radiographically and clinically evaluated for a period of 1 to 6 months. The results were as follows : 1. The loss of clinical symtoms was observed in all 13 teeth. 2. The reduction of size of periapical lesions in radiographs was observed in 10 teeth. The periapical lesions of remaining 3 teeth also look better in the radiographs. 3. All 13 teeth showed the reduction of radiolucency. 4. The gradual resorption of Vitapex over the root apex was observed.
The paper presents recent developments in exact strip postbuckling analysis for anisotropic plates with combined in-plane loading and various in-plane edge conditions. The analysis improves the accuracy of the postbuckling mode ::: and the consequent prediction of stresses and strains in the postbuckling range. Plates are divided into longitudinal strips, for which the governing equilibrium equations are derived and solved analytically. Implementation of the ::: improved analysis into the exact strip software VICONOPT enables accurate stress distributions to be found for each stage of the postbuckling analysis. Numerical results are ::: presented and compared with previous results from VICONOPT and finite element analysis for validation.