Introduction

Total hip arthroplasty (THA) is one of the most common orthopedic surgeries. The procedure is sophisticated and in addition to several factors affecting the outcomes such as patient's status, surgeon's expertise and implant type, using appropriate surgical tools is necessary. Acetabular component implantation necessitates the surgeon to ream the acetabular fossa which is time consuming and devastating. Utilizing currently-used reamers (figure 1), the size of the tool must be changed repeatedly for 5–20 times within a surgery. In every stage, the size of the reamer is increased up to 1–2 mm. This tiring process takes 15–30 minutes and is associated with some injuries to the soft tissue. Furthermore, the risk of mistakes is considerable.