FARUK KARACA, MUSTAFA KÖM, Bünyamin AKSAKAL

Structural and histopathologic changes of calf tibial bones subjected to various drilling processes

Kırık, kemik kayıpları, sıcaklığın neden olduğu osteoliz, nekroz gibi kemik dokusu hasarları ortopedide ciddi klinik sorunlardandır. Bu çalışmada, kemik delme işlemlerinde meydana gelen ısının kemiğe etkisini göstermek için taze sığır tibiaları kullanılarak farklı matkap devir sayıları, delme kuvveti ve kemik densiteleri için ortaya çıkan sıcaklıklar ölçülmüş ve analiz edilmiştir. Maksimum devir sayısı ve matkap çapında maksimum delme sıcaklığı elde edilirken artan drill kuvveti ile sıcaklığın düştüğü belirlenmiştir. SEM ve histopatolojik incelemeler; büyük matkap çapı ve yüksek kemik densitesinin kemik dokuda daha fazla osteosit kaybına yol açtığı ve kemiğe daha fazla hasar vererek delik bölgesinde kemik kalitesinin düşmesine sebep olduğunu gösterdi.

Çeşitli delme işlemlerine tabii tutulan sığır tibia kemiklerinin yapısal ve histopatolojik değişimleri

Bone tissue damages such as fractures, bone tissue losses, osteolysis and necrosis caused by temperature are the serious clinical concerns in orthopaedics. In order to show the effect of heat generation in bone drilling, temperatures were recorded and analysed for various drill speed, diameter, drilling force and bone densities on fresh calf tibial bones. This study revealed that high drill speeds increase the maximum temperature of the bone while high diameters and drill forces cause a decrease in the drilling temperature. SEM and histopathologic evaluations showed that high values of drill diameter and bone density caused greater damage to the bone and lowered the drill quality around the drilled site by producing rough surfaces and higher loss of osteocytes.

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