首页 | 本学科首页   官方微博 | 高级检索  
   检索      


Tensile Mechanical Properties of Swine Cortical Mandibular Bone
Authors:Tamar Brosh  Doron Rozitsky  Silvia Geron  Raphael Pilo
Institution:1. Department of Oral Biology, The Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.; 2. The Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.; 3. Department of Orthodontics, The Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.; 4. Department of Oral Rehabilitation, The Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.; University of Toronto, Canada,
Abstract:Temporary orthodontic mini implants serve as anchorage devices in orthodontic treatments. Often, they are inserted in the jaw bones, between the roots of the teeth. The stability of the mini implants within the bone is one of the major factors affecting their success and, consequently, that of the orthodontic treatment. Bone mechanical properties are important for implant stability. The aim of this study was to determine the tensile properties of the alveolar and basal mandible bones in a swine model. The diametral compression test was employed to study the properties in two orthogonal directions: mesio-distal and occluso-gingival. Small cylindrical cortical bone specimens (2.6 mm diameter, 1.5 mm thickness) were obtained from 7 mandibles using a trephine drill. The sites included different locations (anterior and posterior) and aspects (buccal and lingual) for a total of 16 specimens from each mandible. The load-displacement curves were continuously monitored while loading half of the specimens in the oclluso-gingival direction and half in the mesio-distal direction. The stiffness was calculated from the linear portion of the curve. The mesio-distal direction was 31% stiffer than the occluso-gingival direction. The basal bone was 40% stiffer than the alveolar bone. The posterior zone was 46% stiffer than the anterior zone. The lingual aspect was stiffer than the buccal aspect. Although bone specimens do not behave as brittle materials, the diametral compression test can be adequately used for determining tensile behavior when only small bone specimens can be obtained. In conclusion, to obtain maximal orthodontic mini implant stability, the force components on the implants should be oriented mostly in the mesio-distal direction.
Keywords:
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号