Background: Success of an implant depends on its placement in the bone and how well the stress and strain are distributed to the surrounding structures when occlusal force is applied to it. The size and shape of the implant plays an important role is the formation and distribution of stress and strains in the periodontium. Von Mises stresses and micromovements need to be evaluated while placing implants in D4 bone quality regions for a higher success rate. Aim: To evaluate the peri-implant Von Mises stresses, strains, and micromovements distribution in D4 bone quality around ultra-short implants of 5 mm length with varying diameters of 4 mm, 5 mm, and 6 mm. Materials and Methods: The finite element method was employed to make models replacing maxillary molars in D4 type bone that was missing. Implants that could be classified as ultrashort (5 mm) were used. These implants were of varying diameters of 4, 5, and 6 mm. In each model, the implant was subjected to a force of 100 N and analyzed. The force was applied in an oblique (45 degrees) and vertical direction (90°) to the long axis of the tooth. The models were made such that they simulated cortical and cancellous anisotropic properties of the bone. The models were then analyzed using the program ANSYS workbench version 12.1. Results: When all the three diameters were compared wide diameter, i.e., 6 mm threads had the least values of peri-implant von Mises stresses, strains, and micro-movements around them. When thread shapes were taken into consideration square micro thread created the most favorable stress parameters around them with minimum values of stress, strains, and micromovements. Conclusion: Ultrashort implants combined with a wide diameter and platform switched can be used in atrophic ridges or when there is a need for extensive surgery to prepare the implant site.
The purpose of this systematic review was to evaluate distraction osteogenesis for ridge augmentation in implant dentistry and also to present the associated advantages and limitations. A Medline and manual search was conducted to identify clinical studies concerning distraction osteogenesis in implant dentistry published between 1998 to 2012. 52 articles were assessed. The articles included evaluated the type of distractor used, augmentation achieved and the success and survival rate of implant placed in the augmented site. It was seen that when comparing methods of regeneration, a decreased treatment time is seen in cases of distraction osteogenesis. The reason for this lies in the fact that within 12 weeks the distraction segments are formed and there is a increase noted in the height of the alveolar bone, from 5 to 15 mm as well as an implant survival rate of 95.7%. It can be concluded that distraction osteogenesis is a relatively simple, effective and reliable technique for alveolar ridge reconstruction in contemporary implant dentistry. It can be considered versatile owing to its simplicity, possibility of avoiding bone grafts, infections and blood transfusions. The fact that graft and membrane exposure or inadequate tissue coverage do not pose complications, makes this an effective method of bone augmentation in implantology.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.