Purpose: To assess the affinity of large head total hip arthroplasty in Korean lifestyle sitting position, and the limitation of measurement for post operative function score system. And we assess the usefulness of Korean Lifestyle Score System on Korean patients who get large head total hip arthroplasty operation.
Materials and Methods: 23 patient performed by one operator during for 11 month. We use ceramic - ceramic bearing, 36mm sized head implants, of Lima corporation and we workup at least 6 month. We check Korean Lifestyle Checklist Score. Among the 6 position of the checklist, we check each angles of flexion, external rotation and abduction angles of crossleg, bended knee, squatting position. And we compare each data with normal person’s data.
Results: Average flexion is 93°, external rotation is 67°, and abduction is 37° at crossed leg position. Flexion is 85°, external rotation is 15°, abduction is 0° at bended knee. At squatting position, flexion is 109°, external rotation is 45°, abduction is 42°. Each Korean Lifestyle Checklist Score : use of toilet : 4.9 point, wearing socks is 3.82 points, crossed leg position is 2.48 points. Squatting position is 3.57 points. Tie of shoe is 3.74 points. Bended knee position is 3.7 points.
Conclusion: Large head total hip arthroplasty is a good method for Korean Life style without dislocation. Previously used functional score of Harris Hip Score and Iowa score are just focused on function not on positional aspect. So we recommend Korean Lifestyle Checklist System for Korean arthroplasty patients.

Keywords: Total hip arthroplasty, Large head, Korean lifestyle