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Indian Journal of Orthopaedics (1)
Journal of Trauma Management and Outcomes (1)
Agarwal, Rakesh (2)
Singh, Saurabh (2)
Khare, GN (1)
Kumaraswamy, Vinay (1)
Rai, Anil K (1)
Rai, Anil Kumar (1)
Ratan, Ratnav (1)
Yadav, Vinit (1)
Year of Publication
Bicentric bipolar hip prosthesis: A radiological study of movement at the interprosthetic joint
Rai, Anil Kumar
Indian Journal of Orthopaedics
The bipolar hip prostheses after some time functions as a unipolar device. There is a need to change the design of bipolar hip prostheses to make it function as a bipolar device over a prolonged period of time. A bicentric bipolar hip prosthesis was used as an implant for various conditions of the hip. We evaluated the movement of this newly developed prosthesis at the interprosthetic joint radiologically at periodic intervals.
Materials and Methods:
Fifty two cases were operarted with the Bicentric bipolar prosthesis for indications like fracture neck of femur and various other diseases of the hip and were followed up with serial radiographs at periodic intervals to evaluate, what fraction of the total abduction at the hip was occurring at the interprosthetic joint.
In cases of intracapsular fracture neck of femur, the percentage of total abduction occurring at the interprosthetic joint at 3 months follow-up was 33.74% (mean value of all the patients), which fell to 25.66% at 1.5 years. In indications for bipolar hemireplacement other than fracture neck of femur, the percentage of total abduction occurring at the interprosthetic joint at 3 months follow-up was 71.71% (mean value) and at 1.5 years it was 67.52%.
This study shows the relative preservation of inner bearing movement in the bipolar hip prosthesis with time probably due its refined design. Further refinements are needed to make the prosthesis work better in patients of intracapsular fracture neck femur.
Bicentric bipolar prosthesis; inner bearing; interprosthetic joint
The BHU bicentric bipolar prosthesis in fracture neck femur in active elderly
Rai, Anil K
Journal of Trauma Management and Outcomes
55 BHU bicentric bipolar hemiarthroplasties were reviewed after a mean follow up of 4 years (range 1–5 years). Patients with displaced subcapital fractures were selected for operation on the basis of good mobility before the fracture. Object of the study was to see the efficacy of BHU bipolar prostheses and functional outcome.
There were no incidences of dislocation. Modified Harris hip scoring system scoring system was used which included sitting crosslegged and squatting in view of the sociocultural needs of the patients of Indian subcontinent. Modified Harris hip scoring system 89% had a good or excellent result and 94% had no or only occasional pain. Majority of the patients returned to their prefracture activity.
Thus at follow up of 4 year the BHU bicentric bipolar prosthesis has been shown to be a good option for intracapsular fractures of neck femur with encouraging results.
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