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Effects of various drilling parameters on bone during implantology : An in vitro experimental study

Karaca F., Aksakal B.

Acta of Bioengineering and Biomechanics

2013

Vol. 15, no. 4

25--32

Due to temperature increase during bone drilling, bone necrosis is likely to occur. To minimize bone tissue damage during drilling, a detailed in vitro experimental study by using fresh calf cortical bones has been performed with various combined drilling parameters, such as: drilling environment, drill diameter, drill speed, drill force, feed-rate and drill coating. Bone temperatures at the drilling sites were recorded with high accuracy using multi-thermocouples mounted around the tibial diaphyseal cortex. It was shown that temperatures increased with increased drill speeds. It also decreased with a higher feed-rate and drill force. It was also observed that TiBN coated drills caused higher temperatures in the bone than the uncoated drills and the temperatures increased with larger drill diameters. Although the influence of Simulated Body Fluid (SBF) on rising temperatures during drilling was higher for the TiBN coated drills, it was observed that these drills caused more damage to the bone structure. In order to minimize or avoid bone defects and necrosis, orthopaedic surgeons should consider the optimum drilling parameters.

Wybrane zagadnienia wpływu oddziaływania promieniowania jonizującego na biopolimery.

Kostrzewa B., Szewieczek D.

Inżynieria Materiałowa

1999

R. XX, nr 2

82-85

W artykule przedstawiono zagadnienia dotyczące oddziaływania promieniowania jonizującego na biopolimery. W szczególności opisano przykłady zastosowań polimerów w implantologii medycznej i ich podział na grupy wg odporności na promieniowanie jonizujące, a także zmiany zachodzące pod wpływem promieniowania jonizującego w strukturze polimerów. Poruszono zdaniem autorów ważne zagadnienia związane brakiem prac nad historią eksploatacji implantowanych w organiźmie uprzednio sterylizowanych radiacyjnie polimerów.

In the paper problems of ionizing radiation influence on biopolymers properties have been presented. Particularly the examples of polymers applications in medical implantology, their classification into the groups according to ionizing radiation resistance and changes in structure and properties of polymers proceeding under ionizing radiation influence have been described. Important in authors opinion problems related to exploitation history of implanted biopolymers being earlier exposed to sterilization radiation have been touched.