Author/Authors :
Ein Afshar، Mohammad Javad نويسنده Faculty of Biomedical Engineering, Amirkabir University of
Technology, Tehran, IR Iran , , Rouhi، Gholamreza نويسنده Faculty of Biomedical Engineering, Amirkabir University of
Technology, Tehran, IR Iran , , Aghighi، Mohammad نويسنده , , Mortazavi، SM Javad نويسنده Joint Reconstruction Research Center, Imam Hospital
Complex, Tehran University of Medical Sciences, Tehran, IR
Iran ,
Abstract :
Background: Bone drilling is a common step in orthopedic surgery.
Thrust force is one of the most important parameters that can influence
the quality of bone drilling. The number of drill bit usage has some
limitations and it can affect the quality of bone drilling. Objectives:
The aim of this study was to investigate the limitations of drill bit
usage number to increase the bone drilling quality. Materials and
Methods: Two mid-diaphysis sections of male human cadaveric femora were
prepared. Five orthopedic drill bits were used to identify the effects
of the usage number. An orthopedic hand piece was attached to the
dynamic testing machine. The spindle speed and feed rate of the drill
bits were 900 rpm and 0.5 mm/s, respectively. Drill bit usage of 0, 20,
40, 60 and 80 were prepared for scanning electron microscopy (SEM). SEM
images were taken to illustrate physical changes on the cutting surfaces
of the drill bit. Results: There was an increase in the thrust force by
increasing the number of drill bits usage. Irreversible physical damages
were observed in drill bit point angle, frank face, and flutes of drill
bits. Conclusions: The number of drill bits usage has limitation. Drill
bits that are similar to the ones of the current study are better to be
used no more than 55 times.
