Search: onr:"swepub:oai:gup.ub.gu.se/217231" >
Biomechanical chara...
Biomechanical characterization of osseointegration during healing: an experimental in vivo study in the rat.
-
- Brånemark, Rickard, 1960 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för de kirurgiska disciplinerna, Avdelningen för ortopedi,Institute of Surgical Sciences, Department of Orthopaedics
-
Ohrnell, L O (author)
-
Nilsson, P (author)
-
show more...
-
- Thomsen, Peter, 1953 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för de kirurgiska disciplinerna, Avdelningen för biomaterialvetenskap,Institute of Surgical Sciences, Department of Biomaterials
-
show less...
-
(creator_code:org_t)
- 1997
- 1997
- English.
-
In: Biomaterials. - 0142-9612. ; 18:14, s. 969-78
- Related links:
-
https://gup.ub.gu.se...
Abstract
Subject headings
Close
- This study reports torsion tests and pull-out tests on osseointegrated commercially pure titanium fixtures. The tests were performed in vivo on a total of 26 rats. Three fixtures with a diameter of 2.0 mm were installed bilaterally in the proximal tibia in each animal. The mechanical testing was performed immediately after installation, after 2, 4, 8 and 16 weeks of unloaded healing. The torsional strength started to increase after 4 weeks of unloaded healing and there was a significant increase with time during the initial 16 weeks. The pull-out load increased rapidly during the first 4 weeks; thereafter, a moderate increase occurred during the following 12 weeks. A histological evaluation was performed after 0, 4, 8 and 16 weeks. There were significant (P < 0.01) correlations between torque and percentage of bone in contact with the fixture, and between pull-out load and the bone thickness around the fixture (P < 0.001). Estimations of shear stresses and shear moduli in the bone tissue (pull-out test) and at the interface (torque test) indicated that the increase in bone volume around the implant substantially improved the mechanical capacity.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Odontologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Dentistry (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Ortopedi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Orthopaedics (hsv//eng)
Keyword
- Animals
- Biomechanical Phenomena
- Calcification
- Physiologic
- physiology
- Male
- Prostheses and Implants
- standards
- Rats
- Rats
- Sprague-Dawley
- Surface Properties
- Tibia
- metabolism
- physiology
- Titanium
- metabolism
- Weight-Bearing
- Wound Healing
- physiology
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database