STRESS TO THE BONE AROUND ORTHODONTIC IMPLANTS IN THE MANDIBULAR MOLAR REGION: A FINITE ELEMENT EVALUATION
Journal Title: Stomatos - Year 2012, Vol 18, Issue 34
Abstract
Mini-screw implants have been commonly used for orthodontic anchorage. However, the behavior of implants may vary according to their location, inclination, loading position and loading direction. The objective of this study was to apply finite element to analyze stress distribution around mini-implants inserted into the buccal cortical bone, in the inferior molar region, when a force of 3 N was applied, varying implant inclination and loading direction, also simulating immediate loading and osseointegration conditions. We carried out a three-dimensional analysis of a human cadaveric mandible and of a 9 mm length, 1.5 mm diameter titanium implant. The implant model was introduced into the buccal cortical bone, between the first and second mandibular molars. Finite-element analysis of the implant-bone structure was carried out applying a constant force of 3 N at varying angles (15, 30, 45, 60, 75, and 90 degrees), and in five different positions along the bone surface axis (perpendicularly, vertically at ± 10 degrees, and horizontally at ± 20 degrees). Out of all combinations tested, stress affected only the cortical bone, not being intense enough to cause cortical bone resorption. Stress distribution varied slightly (8.55 to 38.74 Mpa) due to implant inclination and loading direction. Immediate loading generated greater tensions (12.70 to 38.74 Mpa) when compared to osseointegration (8.55 to 21.44 Mpa). A force of 3 N did not result in a tension that could cause cortical bone resorption. Immediate loading resulted in greater tensions to the bone, regardless of implant inclination and loading direction.
Authors and Affiliations
Rogério de Aguiar, Leandro Corso, Naiara Larentis, Vania Fontanella
Keywords
Related Articles
- EP ID EP151115
- DOI -
- Views 84
- Downloads 0
Apical sealing provided by different root canal sealers
To have success in endodontic treatment it is necessary that the sealing airtight as possible of the root canal system, with suitable material such as gutta-percha and sealer. There are sealers of different compositions,...
Stem cells and their applications in Dentistry: a Literature Review
Since stem cells were discovered, professionals in many different areas of healthcare have been using them as an important tool for fighting diseases, particularly diseases for which science has been unable to find cures...
The influence of smoking on periodontal status
This study aimed to evaluate the periodontal status and level of oral hygiene in smokers and non smokers enrolled in the Clinic of Dentistry, State University of Paraíba. A prospective study examining 30 patients, includ...
Effect of raloxifene on alveolar bone resorption after mucoperiosteal flap surgery in mice
Background: Mucoperiosteal flap surgeries (MFS) are carried out to provide access to the alveolar bone and root surfaces in several clinical situations. Nevertheless, they lead to a variable degree of alveolar bone resor...
Bonding to the dental substrates and the main topics: a literature review
Although the great improvement of the adhesive materials in the last years, the adhesion to the dental tissues still remains a point to be studied. The adhesion to the enamel has been considered as long term resistant, d...