Do oxidized zirconium femoral heads reduce polyethylene wear in cemented THAs? A blinded randomized clinical trial.

Background: Charnley low-friction torque total hip arthroplasty (THA) remains the gold standard in THA. The main cause for failure is wear of the socket. Highly crosslinked polyethylene (HXLPE) has been associated with reduced wear rates.

Intraprosthetic dislocation: a potentially serious complication of dual mobility acetabular cups.

Though dual mobility cups have gained growing popularity as a solution for instability in total hip replacements, these promising devices are subject to a specific implant failure mode, named intraprosthetic dislocation. We present the case of a patient sustaining such an adverse event. The planned revision surgery was postponed 12 months due to a severe heart condition, allowing a rare opportunity to document the natural history of this unusual complication.

Charnley-Kerboull total hip arthroplasty combining zirconia on polyethylene. A minimum eight-year follow-up prospective study.

Purpose: Zirconia was introduced in the 1980s for total hip arthroplasty (THA) with the expectation of lower polyethylene wear. The purpose of this prospective study was to evaluate the results of a continuous series of total hip arthroplasties combining a zirconia head with polyethylene socket at a minimum eight-year follow-up.

Methods: We performed an open prospective clinical trial in 1997.

Is percutaneous adductor tenotomy as effective and safe as the open procedure?

Background: Percutaneous adductor longus tenotomy (PAT) is a frequently used procedure, yet no study has ever compared its effectiveness and safety with those of open adductor longus tenotomy (OAT). We conducted this prospective study to describe the effects of PAT and to compare them with those of OAT.

Methods: This consisted of a cross-over randomized controlled trial including 50 consecutive hips from 27 patients with cerebral palsy scheduled for adductor tenotomy in the setting of multilevel tendon lengthening/release procedures or hip surgery (femoral or Dega osteotomy) in a university hospital.

Dysplasia epiphysealis hemimelica of the elbow.

Dysplasia epiphysealis hemimelica (DEH) or Trevor's disease is a rare disorder affecting the epiphyses and short bones of the limbs, and characterized by a benign overgrowth of the medial-half of the epiphysis resembling osteochondroma. Upper limb involvement is very rare and most commonly affects the carpal bones. Only five established cases of DEH around the elbow were found in the orthopedic literature.

Is visual estimation of passive range of motion in the pediatric lower limb valid and reliable?

Background: Visual estimation (VE) is an essential tool for evaluation of range of motion. Few papers discussed its validity in children orthopedics' practice. The purpose of our study was to assess validity and reliability of VE for passive range of motions (PROMs) of children's lower limbs.

Risk of recurrent dislocation and avascular necrosis after proximal femoral varus osteotomy in children with cerebral palsy.

A retrospective review was conducted on 50 children with cerebral palsy, having 89 femoral varus osteotomy at an average age of 7.4 years, trying to identify risk factors for complications, particularly redislocation and avascular necrosis. Among the well-reduced hips, new subluxation developed in 12 cases; postoperative radiographic measurements showed a mean neck-shaft angle of 135 degrees and an acetabular slope of 32 degrees .

Radiofrequency application to the growth plate in the rabbit: a new potential approach to epiphysiodesis.

Background: Radiofrequency energy is being used more and more frequently in orthopaedics, mainly in the treatment of bone tumors. We postulated that radiofrequency ablation may produce growth plate lesions similar to those observed in the bone and conducted this study to see whether radiofrequency may be used as a technique for producing epiphysiodesis.

Methods: We randomized 60 8-week-old female New Zealand white rabbits into 3 groups.

Pediatric cervical spine instability.

Cervical spine instability in children is rare but not exceptional and may be due to many factors. Although it mostly occurs at the upper cervical spine, all vertebrae from the occiput to T1 may be involved. It may be acute or chronic, occurring secondary to trauma or due to congenital anomaly, skeletal or metabolic dystrophy or rheumatoid arthritis.

Skeletal features of primary hyperoxaluria type 1, revisited.

Purpose: The purpose of this study was to describe the skeletal manifestations of primary hyperoxaluria type 1 (PH1), the most common of the primary hyperoxalurias.

Methods: We clinically and radiographically reviewed 12 consecutive patients diagnosed with PH1, aged between 2 and 17 years. All patients had evidence of some type of renal involvement, 4 of whom were at end-stage renal disease (ESRD) and were under dialysis.

Free vascularized fibular flap for congenital ulnar pseudarthrosis: a report of two cases and review of the literature.

Congenital pseudarthrosis of the ulna (CPU) is an extremely rare disorder that has been treated with various traditional methods with poor results on long-term deformity correction and bony union. Free vascularized fibular grafting (FVFG) has been used to treat congenital pseudarthroses with improved success rates. We report herein 2 cases of CPU treated with FVFG in which bone union was obtained without major difficulty.

The risk of neuro-orthopaedic malformations following in-vitro fertilization.

The purpose of this study was to assess the risk of neuro-orthopaedic malformations after in-vitro fertilization. We compared the prevalence of neuro-orthopaedic malformations in two groups of pregnancies conceived either naturally or by in-vitro fertilization, and used multivariate analysis to study the impact of each variable. The results showed a prevalence of 0.