Cell Morphology, Viability, Osteocalcin Activity, and Alkaline Phosphatase Activity in Milled versus Unmilled Surface of the Femoral Head

Author:

Rhyu Kee Hyung1,Cho Chang Hoon23,Yoon Kyung Sik23,Chun Young Soo1

Affiliation:

1. Department of Orthopaedic Surgery, College of Medicine, Kyung Hee University, Kyung Hee University Hospital at Gangdong, Seoul, Korea

2. Department of Biochemistry and Molecular Biology, School of Medicine, Kyung Hee University, Kyunghee-daero, Dongdaemun-gu, Seoul, Korea

3. Department of Biochemistry and Molecular Biology (BK21 project); Medical Research Center for Bioreaction to Reactive Oxygen Species and Biomedical Science Institute, School of Medicine, Kyung Hee University, Kyunghee-daero, Dongdaemun-gu, Seoul, Korea

Abstract

Purpose To evaluate cellular activity in milled versus unmilled surface of the femoral head in 21 patients who underwent robot-assisted total hip arthroplasty (THA). Methods The femoral head of 21 consecutive patients who underwent robot-assisted THA for osteonecrosis was used. 10 cc of trabecular bone from the entire milled surface was obtained using a curette. The same amount of trabecular bone was obtained at least 1 cm away from the milled surface and served as a matched control. Cell morphology, viability, osteocalcin activity, and alkaline phosphatase activity in milled versus unmilled surface were assessed. Results Cell morphology of the milled or unmilled surface was comparable; cells were smaller in the milled surface. Cell viability was a mean of 40% higher in the milled surface (107.4% vs. 67.2%, p<0.001); cell viability at 5 time points was comparable in each group. Osteocalcin activity of cells was slightly higher in the milled surface (1.43 vs. 1.24 ng/ml, p=0.69). Alkaline phosphatase activity of cells was slightly higher in the unmilled surface (150 105 vs. 141 789 U/L, p=0.078). Conclusion The milled and unmilled surfaces of the femoral head were comparable in terms of cell morphology, viability, osteocalcin activity, and alkaline phosphatase activity.

Publisher

SAGE Publications

Subject

Surgery

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