Healing at sites prepared using different drilling protocols. An experimental study in the tibiae of sheep
Autor: | Karol Alí Apaza Alccayhuaman, Franco Bengazi, Vittorio Favero, Guillermo Alejandro Benedetto, Shigeru Sakuma, Daniele Botticelli |
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Rok vydání: | 2018 |
Předmět: |
Time Factors
Bone development Rotation lcsh:Medicine Dentistry Bone healing Bone resorption Osseointegration 03 medical and health sciences 0302 clinical medicine 0502 economics and business Animals Orthopedic Procedures Tibia lcsh:Science Wound Healing Multidisciplinary Sheep business.industry Chemistry lcsh:R 05 social sciences 030206 dentistry Prostheses and Implants Tissue repair lcsh:Q 050211 marketing Female Implant business |
Zdroj: | PLoS ONE, Vol 13, Iss 8, p e0202957 (2018) |
ISSN: | 1932-6203 |
Popis: | The aim of the experiment was to study the healing at implants installed in site prepared in bone type 1 using different rotation speeds and cooling strategies. The tibiae of twelve sheep were used as experimental sites. Two implant sites were prepared in each tibia using drills either at a high or a mixed speed under irrigation. At the mixed-speed sites, 60 rpm without irrigation were applied for the last drill, the countersink and during implant installation. Biopsies representing the healing after 1, 2, and 6 weeks were obtained and ground sections were prepared. At the histological analyses, after 1 week of healing, no new bone was found at both high- and mixed-speed sites. After 2 weeks of healing, small amounts of newly formed bone were observed in the cortical layer, reaching percentages of 3.6±3.0% at the mixed-speed sites, and of 2.2±1.5% at the high-speed sites. An irrelevant quantity of new bone was seen in the marrow compartments of a few specimens. After 6 weeks of healing, new bone was found in higher quantity, reaching in the cortical compartment 66.9±6.8% and 67.3±17.7% at the mixed- and high-speed sites, respectively. The respective percentages in the marrow compartment were 23.2±13.0% and 30.6±29.2%. No statistically significant differences between high- and mixed-speed groups were found. It was concluded that the use of the last drill and the installation of the implant with or without irrigation yielded similar bone healing and osseointegration. |
Databáze: | OpenAIRE |
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