The primary purpose of this study is to measure the postoperative changes in bone mineral density, comparing the Taperloc Complete Reduced Distal Microplasty stem and the standard length Taperloc Complete Reduced Distal stem.
The Taperloc Microplasty cementless stem is designed to transmit load to the proximal femur, thereby preserving bone density, and preventing long term instability and loosening secondary to proximal bone resorption. The primary aim of this study is therefore to compare the postoperative changes in bone density with the Taperloc Microplasty stem, using the standard length Taperloc stem as a control. In addition, the Taperloc stem has historically had a neck angle of 138°. There have been criticisms that this neck angle is too high for the typical Korean population. The newer Taperloc Complete system (both Microplasty and standard length) has a neck angle of 133°. A secondary aim is Occurrence ratio of thigh pain difference between Microplasty and standard stem in Korean Population
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
SINGLE
Enrollment
100
Taperloc Complete Microplsty cementless stem is designed to transmit load to the proximal femur, thereby preserving bone density, and preventing long term instability and loosening secondary to proximal bone resorption.
Taperloc Complete Standard is designed after the philosophy of a flat tapered wedge. It has evolved to incorporate the Reduced Distal and Microplasty stems to better address all patient anatomies, and facilitate multiple surgical techniques.
Seoul National University Bundang Hospital
Gyeonggi-do, South Korea
Chung-Ang University Hospital
Seoul, South Korea
Bone Mineral Density
evaluate bone mineral density around the implant
Time frame: 1 year
Radiographic Evaluation,
Radiographic measurements of stability and fixation
Time frame: 2 years
VAS Score
The measurement of pain intensity
Time frame: 2 years
Modified Harris Hip Score
* Over all Survivorship * Harris Hip Score
Time frame: 2 years
Radiographic Evaluation
Radiographic measurements of stability and fixation
Time frame: 1 year
Radiographic Evaluation
Radiographic measurements of stability and fixation
Time frame: 6 Weeks
VAS Score
The measurement of pain intensity
Time frame: 1 year
VAS Score
The measurement of pain intensity
Time frame: 6 Weeks
VAS Score
The measurement of pain intensity
Time frame: 6 Months
Modified Harris Hip Score
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* Over all Survivorship * Harris Hip Score
Time frame: 1 year
Modified Harris Hip Score
* Over all Survivorship * Harris Hip Score
Time frame: 6 Months
Bone Mineral Density
* Two X-ray beams with different energy levels are aimed at the patient's bones. * DEXA * evaluate the bone mineral density around the implant
Time frame: Immediate post-op(2 - 4Weeks)