hip arthroplasty

When Total Hip Arthroplasty (THA) is required in a patient with developmental dysplasia of the hip (DDH), bone deficiency in the acetabular roof often remains a problem. The iliac crest (IC) has long been the preferred source of autograft material, but graft harvest is associated with frequent complications and pain. Autologous bone graft can also be obtained from the femoral head (FH) for reconstruction of the acetabulum in hip arthroplasty. However, in certain challenging clinical scenarios, incorporation of the femoral head autograft appears less successful than the iliac crest autograft. The difference in potential for proliferation and osteoblastic differentiation between the two sites has still not been evaluated; therefore, it is not known how to compensate for this difference when it is present. We designed this study to evaluate the number of mesenchymal stem cells (MSCs) in both the iliac crest and femoral head of the same patient. We also determined the best operating room procedure for loading the femoral head with MSCs to achieve equivalent numbers of MSCs as in the IC. Twenty patients (8 men and 16 women) undergoing THA for DDH were enrolled in the study. The mean age was 55.5 years (range 41–65 years). Bone marrow aspirates were obtained from three depths within the femoral head and the aspirates were quantified relative to matched iliac crest aspirates that were obtained from the same patient at the same time. The cell count, progenitor cell concentration (cells/mL marrow), and progenitor cell prevalence (progenitor cells/million nucleated cells) were calculated. Aspirates of FH marrow demonstrated less concentrations of mononuclear cells compared with matched controls from the iliac crest. Progenitor cell concentrations were consistently lower in FH aspirates compared to matched controls from the iliac crest (p = 0.05). The concentration of osteogenic progenitor cells was, on average, 40% lower in the FH aspirates than in the paired iliac crest samples (p = 0.05). However, with bone marrow aspirated from the iliac crest, we were able to load the femoral head autograft with sufficient MSCs to obtain the same number as present in an iliac crest. With concentrated bone marrow from the IC, supercharging the femoral autograft with MSCs to numbers above that present in the IC was possible in the operating room, and the number of MSCs supercharged in the femoral head was predictable. Based on these findings we suggest that FH graft supercharged with BM-MSCs from the IC is comparable to IC graft for osseous graft supplementation especially in THA for patients with DDH.

Introduction: Total hip arthroplasty is a procedure widely performed in orthopedics, as it is capable of restoring function in the hips, severely affected by orthopedic diseases, such as osteoarthritis and consequently reducing pain and restoring function. Objective: To identify the effects of physical therapy in the postoperative period of total hip arthroplasty. Method: This is an integrative review, of an exploratory and descriptive nature, carried out between January and May 2024 and guided by the recommendations of the Joanna Brigs Institute. The Pubmed, LILACS, and SciELO databases were used. The following descriptors were used for the search procedure: “Physiotherapy and hip arthroplasty”. For the operationalization of the search, the Boolean descriptor “AND” was used to cross the descriptors. Articles were included in randomized clinical trials, published in full, without restriction of language and/or year of publication, which dealt with the theme addressed and that responded to the objective of the study. On the other hand, editorial letters, any type of literature review, articles unavailable at the time of search, abstracts and/or full articles published in annals of scientific events, preprints, and articles without abstracts were excluded. Results: After searches in the databases, 108 articles were identified on the platforms, subsequently, all had their titles and abstracts read, then 58 articles were excluded for not meeting the eligibility criteria, leaving 50 articles carefully read in full, after complete reading, only 7 articles composed the final sample. Final considerations: based on the reading and analysis of the articles that were previously selected, it was observed that there is no pre-established protocol among the authors for the postoperative period of hip arthroplasty, but that physical therapy techniques associated with therapist support and an early start are responsible for improving functionality, quality of life, pain reduction and increased muscle strength.