[Twelve cases of total arthroplasty of lumbar disc. Preliminary results at 6 months].

Lumbar pathology is a problem with growing incidence in developed countries. Lumbar pain caused by disc degeneration is the most frequently cause of functional restriction in patients under 45 years old. Discectomy, laminectomy and posterior spinal fusion have been the traditional surgery treatment.

[Utility of platelet-rich plasma and growth factors bone in the bone defects. Regional Hospital Lic. Adolfo López Mateos, ISSSTE].

Introduction: The platelet-rich plasma is a concentrated of platelets with the presence of growth factors and proteins that serve as osteoconducer matrix for bone formation. We present the results obtained with the use of platelet-rich plasma and a hydroxyapatite and bovine collagen graft in the management of bone defects.

Material And Methods: We studied eight patients with bone defects, treated surgically in whom platelet rich plasma and a hydroxyapatite and bovine collagen graft was used, with clinical and radiographic follow-up at 2, 4, 6, 10 and 18 weeks after surgery.

[Bone tissue response to the echelon-type uncemented femoral component in revision total hip arthroplasty (THA)].

Introduction: We present the preliminary, short-term results of a cohort study of revision THA focused on aseptic loosening and aimed at assessing the metadiaphyseal bone ingrowth biological response of an uncemented femoral implant with an extensive porous coating.

Material And Methods: The clinical, X-ray and personal satisfaction outcomes (SF-36) of four patients were assesessed. We had performed four exchange THAs due to a diagnosis of clinical and radiographic aseptic prosthetic loosening, with symptoms of anterior thigh pain.