Sijin K. Sidharthan

Wrightington Hospital

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Hip offset and leg-length restoration in revision hip arthroplasty with a monoblock, hydroxyapatite-coated stem

Hip International (2022)

Paul Saunders Debbie A. Shaw Sijin K. Sidharthan Stephen K. Young Tim Board

Aims: Restoration of normal hip biomechanics in arthroplasty surgery is important in order to achieve good muscle function and joint stability. Methods: In this retrospective cohort study, we examined the postoperative radiographs of 131 femoral revision arthroplasty procedures using a monoblock, fully hydroxyapatite (HA)-coated titanium stem. Femoral offset, modified-global offset and leg length were measured of the operated and contralateral hips. Results: Femoral offset was restored to ±10 mm in 108 cases (82%), modified-global offset was restored ±10 mm in 93 cases (71%) and leg length was restored to ±10 mm in 102 cases (81%). There were 4 dislocations with a mean follow-up period of 38 months. Conclusions: Restoration of hip biomechanics is achievable with a monoblock stem and thus is a viable option in revision hip arthroplasty.

Biomechanics

Hip Arthroplasty

10.1177/11207000221117782

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OUTCOME OF HINGE KNEE ARTHROPLASTY FOR COMPLEX KNEE REVISIONS

Orthopaedic Proceedings (2018)

Sijin K. Sidharthan N Lokikere A Saraogi Hiroki Nagai Henry Wynn-Jones

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OUTCOME OF HINGE KNEE ARTHROPLASTY FOR COMPLEX KNEE REVISIONS

Journal of Bone and Joint Surgery-british Volume (2017)

Sijin K. Sidharthan N Lokikere A Saraogi Hiroki Nagai Henry Wynn-Jones

Background One of the major concerns of hinge knees have been reported in literature is mechanical failure. Failure in the form of component fracture (2–10%) and hinge dislocation/ failure are worrisome. In addition, higher risk of aseptic loosening with hinge knee prosthesis has been attributed to stress transfer at bone cement interface. Methods Retrospective review of clinical and radiological results of 71 consecutive patients operated at single centre using Smiles hinge knee (Stanmore implants) between 2010 and 2014. Data was collected till the latest follow up. Mechanical failure due to any reason was considered as primary end point. Radiological evidence of aseptic loosening was considered to be one of the surrogate end points. Results Mean age at revision knee was 65.4 years (range 42 – 84). The number of previous revisions ranged from 1 – 4. Most common indications for revision were infection (n=26) and instability (n=26). Majority of patients had rotating hinge knee (n=66). Average follow-up was 31 months (range 3 – 72). Four patients died during follow-up due to medical reasons. There were no mechanical failures of implants apart from backing out of axle due to failure of circlip in 1 patient. Asymptomatic aseptic loosening of implant on femoral side was noted in 1 patient; however, there were no peri-prosthetic fractures in this series. Three patients had re-revision for infection and one for extensor mechanism subluxation. Conclusion To our knowledge, this is the largest series till date reporting on mechanical outcomes of hinged knee implants for complex revisions. Clip failure is of concern; however there have been no other mechanical failures. Early results are encouraging, with no symptomatic aseptic loosening of implants to report.

Subluxation

Implant Failure

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Distal biceps tendon repairs and reconstructions-an analysis of demographics, prodromal symptoms and complications

Archives of Orthopaedic and Trauma Surgery (2021)

Toni Luokkala Sijin K. Sidharthan Teemu Karjalainen Juha Paloneva Adam C. Watts

10.1007/s00402-021-03750-1

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Citations (10)

Survivorship and Radiological Analysis of a Monoblock, Hydroxyapatite-Coated Titanium Stem in Revision Hip Arthroplasty