J Korean Orthop Assoc.  2000 Jun;35(3):455-460.

Primary Total Hip Arthroplasty with a CLS Expansion Acetabular Component: Mid Term Follow-Up Study

• Kim SY
• Park GW

Abstract

PURPOSE
To evaluate the results of total hip arthroplasty (THA) with a CLS expansion acetabular cup using press-fit technique.
MATERIALS AND METHODS
One hundred and nineteen primary THA in 102 patients with a CLS expansion cup by press-fit technique were performed consecutively. Eighty-four hips were evaluated for clinical analysis by Harris hip score (HHS) , and 70 hips were evaluated for radiographic analysis, including stability (cup migration and change of position) , remodelling (change of polar gap and trabecular pattern) , and early wear rate of polyethylene after a mean follow up of 4 years and 9 months.
RESULTS
Mean HHS was improved from 44.9 points preoperatively to 90.4 points at the most recent follow up. Initial adequate contact fit was found in 64 hips (91%) . Radiolographically, optimal stabilities of acetabular cup at the most recent follow up were found in all hips. Polar gap in 38 hips (78%) of 48 hips at postoperative radiographs disappeared at most recent follow up. Periacetabular trabecular patterns were maintained or improved in all cases.
CONCLUSION
CLS expansion acetabular cup fixation by press-fit technique guaranteed an excellent implant stability.

Keyword

Total hip arthroplasty; CLS expansion acetabular cup

MeSH Terms

Acetabulum*
Arthroplasty, Replacement, Hip*
Follow-Up Studies*
Hip
Humans
Polyethylene
Polyethylene