Iranian Journal of Orthopedic Surgery

Effect of Rotatory-Vibrational Bone Drilling in Lowering Thermal Necrosis (An Animal Study)

Authors

Ehsan Shakouri, MSc
Mohammad Hosseyn Sadeghi, PhD
Mohammadreza Karafi, PhD
Mahmood Farzin, PhD
https://doi.org/10.22034/ijos.2020.121262
Abstract
Background: Internal immobilization of bone fracture often requires drilling and screw fixation of implanted bone. During bone drilling, the temperature could increase above 47°C causing irreversible thermal necrosis. This study is an experimental bone drilling with ultrasonic-assist in evaluating the temperature increase in comparison with conventional drilling.Methods: An experimental study on a bovine femur specimen was performed by drilling holes with ultrasonic assisted drill. The generated temperature in different speeds was documented at the drilling site, and was compared with the conventional drilling technique.Results: Ultrasonic-assisted drilling at 1000 rpm produced less temperature elevation compared with conventional drilling. Furthermore, at rotational speed of 2000 rpm, the temperature raise was independent of “feed rate” of the drilling.Conclusions: Using ultrasonic vibration in drilling of bovine femur produces less temperature raise in drill site, and works independent “feed rate” when compared with conventional drilling.

Keywords

Bone
heating
Ncrosis
ultrasonic
vibration

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