The purpose of this study is to explore the benefit of X3 polyethlene inserts with larger diameter heads used in the Japanese population. Range of Motion (ROM) and lift-off distance for both 28mm, 32mm and 36mm in patients will be examined intraoperatively by using the Stryker computerized tomography (CT) based Navigation system. Another aspect of this study is to observe wear resistance performance of X3 over historical liner existing highly crosslinked polyethylene.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
120
Nagoya Kyoritsu Hospital
Nagoya, Aichi-ken, Japan
Yokohama City University Hospital
Yokohama, Kanagawa, Japan
Kyowakai Hospital.
Suita, Osaka, Japan
Osaka City General Hospital.
Osaka, Japan
Range of Motion(ROM) (Degree)
Measure and compare the ROM using femoral head trials of 36mm- and 28mm-diameter during intraoperative confirmation.
Time frame: Intraoperative
Lift Off Distance in Dislocation Maneuver(mm)
Measure and compare the lift off distance in dislocation maneuver using femoral head trials of 36mm- and 28mm-diameter during intraoperative confirmation.
Time frame: Intraoperative
Wear Rate(%)
Retrospective comparison of the wear amount over time between X3 liner and Crossfire insert.
Time frame: 1 year, 2 years, 3 years and 5 years after surgery
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