This study will evaluate a midterm clinical and radiologic outcome patients who undergo new alumina-zirconia composite ceramic bearing THA.
Total hip arthroplasty (THA) using a metal-on-polyethylene articulation has become one of the most effective procedures for the surgical treatment for end-stage hip disease. However, polyethylene wear debris-induced osteolysis has been postulated to cause/contribute to the aseptic loosening of a THA, and hence, is regarded to be an important factor in its in vivo longevity. In the third generation of ceramic manufacturing, many improvements, such as hot isostatic pressing, laser marking, and non destructive proof-testing for all ceramic components, have been introduced. This third generation ceramic component has high purity, high density, and small grain size, and, therefore, has a very high potential for resisting crack propagation, which may culminate in its fracture. In spite of this, a number of substantial concerns, such as ceramic fracture, impingement-associated fatigue failure, wear, and osteolysis after long-term follow-up, persist with the use of ceramics in THA. In addition, the third generation ceramic articulation is associated with an increased incidence of dislocation because ceramic liners with elevated rim and extended-long-neck ceramic heads are not available. However, new alumina-zirconia composites bearing implants (4th generation ceramic bearing) affords various options such as large head and thin liner, which may decrease the ceramic fracture rate and dislocation rate and improve the longevity of THA. In addition, large head can improve the range of motion and possible traditional cross-legged sitting position of Koreans without impingement between the neck and liner rim. So far, the patients who are underwent THA using 28 mm femoral head diameter complains limitation of range of motion and feeling impingement sensation at sitting on the floor with their legs crossed. There have been increasing complaints especially from Korean patients regarding the difficulties associated with carrying out their daily activities, whose life style involves sitting on the floor with their legs crossed. Therefore, large head of new alumina-zirconia composites bearing implants(4th generation ceramic bearing) expects increasing satisfaction of Korean patients. This is the first study, to our knowledge, of an evaluation of clinical outcome of THA with use of the new alumina-zirconia(4th generation ceramic bearing) composite ceramic bearing and the functional outcome.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
310
THA with use of the new alumina-zirconia(4th generation ceramic bearing) composite ceramic bearing at a minimum of 10 years follow-up.
Seoul national University Bundang Hospital
Seongnam-si, Gyeonggi-do, South Korea
Survival rate of THA with use of the new alumina-zirconia(4th generation ceramic bearing) composite ceramic bearing at a minimum of 10 years follow-up.
Time frame: up to 10 years
The performance in patients younger than 50 years at 10 years follow up
Time frame: Follow-up evaluations will be performed at six weeks; at three, six, nine, and twelve months and every 12 months thereafter.
Evaluation between preoperative and postoperative of Harris hip score, UCLA activity score, WOMAC, and Subject satisfaction score at a minimum of 5 years follow-up.
Time frame: Follow-up evaluations will be performed at six weeks; at three, six, nine, and twelve months and every 12 months thereafter.
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