title: Results of Total Hip Arthroplasty after Core Decompression with Tantalum Rod for Osteonecrosis of the Femoral Head.
abstract: BACKGROUND
  Early stage osteonecrosis of the femoral head (ONFH) has many treatment options including core decompression with implantation of a tantalum rod. The purpose of this study was to evaluate clinical and radiological outcomes and potential complications during conversion total hip arthroplasty (THA) in such patients.
  
  
  METHODS
  Six male patients (8 hips) underwent THA subsequent to removing a tantalum rod (group I) from April 2010 to November 2011. We retrospectively reviewed the medical records of these patients. We enrolled 12 age- and sex-matched patients (16 hips) during the same period, who had undergone primary THA without a previous operation as the control group (group II). All patients were followed for at least 3 years. We checked the Harris hip score (HHS), operative time, and volume of blood loss. Radiological results, including inclination, anteversion of the acetabular cup, presence of periprosthetic osteolysis, and subsidence of femoral stem were checked at the last follow-up.
  
  
  RESULTS
  The mean preoperative HHS values were 56.5 (range, 50 to 62) and 59.1 (range, 42 to 70) in groups I and II, respectively. The HHS improved to 96.0 (range, 93 to 100) and 97.6 (range, 93 to 100), respectively, at the 3-year follow-up (p = 0.172). Mean operation time was 98.8 minutes (range, 70 to 120 minutes) in group I and 77.5 minutes (range, 60 to 115 minutes) in group II (p = 0.006). Total blood loss volumes were 1,193.8 mL (range, 960 to 1,360 mL) and 944.1 mL (range, 640 to 1,280 mL) in groups I and II, respectively (p = 0.004). No significant differences in inclination or anteversion of acetabular cup and no evidence of osteolysis or subsidence of the femoral stem were reported in either group in radiological follow-up results. However, one case of squeaking occurred in group I during the follow-up.
  
  
  CONCLUSIONS
  The two groups showed no clinical or radiological differences except extended operative time and increased blood loss. However, the incidence of squeaking (1 of 8 hips) was higher, as compared to the control group or previously reported values.
authors.affiliation: Department of Orthopedic Surgery, Center for Joint Disease, Chonnam National University Hwasun Hospital, Hwasun, Korea.
authors.forename: Gun-Woo
authors.initials: GW
authors.lastname: Lee
authors.affiliation: Department of Orthopedic Surgery, Center for Joint Disease, Chonnam National University Hwasun Hospital, Hwasun, Korea.
authors.forename: Kyung-Soon
authors.initials: KS
authors.lastname: Park
authors.affiliation: Department of Orthopedic Surgery, Center for Joint Disease, Chonnam National University Hwasun Hospital, Hwasun, Korea.
authors.forename: Do-Youn
authors.initials: DY
authors.lastname: Kim
authors.affiliation: Department of Orthopedic Surgery, Center for Joint Disease, Chonnam National University Hwasun Hospital, Hwasun, Korea.
authors.forename: Young-Min
authors.initials: YM
authors.lastname: Lee
authors.affiliation: Department of Traumatology, Neurosurgery, and Military Field Surgery, Samarkand State Medical Institute, Samarkand, Uzbekistan.
authors.forename: Kamolhuja Eshnazarovich
authors.initials: KE
authors.lastname: Eshnazarov
authors.affiliation: Department of Orthopedic Surgery, Center for Joint Disease, Chonnam National University Hwasun Hospital, Hwasun, Korea.
authors.forename: Taek-Rim
authors.initials: TR
authors.lastname: Yoon
mesh_terms: D000328:Adult; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects / Q000379:methods / Q000706:statistics & numerical data; D016022:Case-Control Studies; D019299:Decompression, Surgical / Q000009:adverse effects / Q000379:methods / Q000706:statistics & numerical data; D005270:Femur Head / Q000000981:diagnostic imaging / Q000601:surgery; D005271:Femur Head Necrosis / Q000000981:diagnostic imaging / Q000601:surgery*; D006801:Humans; D008297:Male; D011183:Postoperative Complications; D012086:Reoperation; D012189:Retrospective Studies; D013635:Tantalum / Q000627:therapeutic use*; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome
chemical_list: D013635:Tantalum
keywords: Complications; Decompression; Femur head necrosis; Hip replacement arthroplasty