J Korean Orthop Assoc.  1999 Aug;34(4):735-741.

Five to Six Year Results of Hydroxyapatite Coated Femoral Implants

  • 1Department of Orthopedic Surgery, Presbyterian Medical Center, Chonju, Korea.


We report clinical and radiological results of 32 HA-coated femoral implants at midterm follow-up.
We reviewed 25 patients (32 hips) treated with HA-coated femoral implants from April 1992 to october 1993. The follow up period was five to six years (average 64.5 months)
Harris hip score averaged 93 at the most recent follow-up examination. At the last follow-up, three patient suffered mild thigh pain, but experienced no trouble in daily activity. In radiological evaluation, the endosteal bone formation was noted mostly in Gruen zone 2 and 6 of HA-coated area. The radiolucent line was noted mostly in Gruen zone 4 of uncoated area. Enghs radiological score was increased in fixation scale but decreased in stability scale during the follow-up period.
HA-coated component provides early pain relief and satisfactory radiological result. However, a longer follow-up is required to determine whether the favorable results of HA-coated implant are maintained or not.


Hydroxyapatite; femoral implant; Hip; Arthroplasty
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