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J Biomed Mater Res B Appl Biomater 2022 Jul 2. Epub 2022 Jul 2.

Biomechanical Engineering Laboratory (LEBm), University Hospital, Department of Mechanical Engineering, Federal University of Santa Catarina (UFSC), Florianópolis, Santa Catarina, Brazil.

Prior to clinical use, the corrosion resistance of new prosthesis system must be verified. The fretting-corrosion mechanisms of total hip arthroplasty (THA) implants generate metal debris and ions that can increase the incidence of adverse tissue reactions. For cemented stems, there are at least two interfaces that can be damaged by fretting-corrosion: stem-head and stem-cement. Read More

Medicine (Baltimore) 2022 Jul 1;101(26):e29811. Epub 2022 Jul 1.

Department of Orthopedics, The Affiliated Hospital of Jining Medical University, Jining, Shandong Province, China.

Rationale: A solution revision prosthesis has a multilayer microporous Porocoat coating, and the availability of multiple stem body sizes ensures that the prosthesis is adapted to each patient's anatomical structure so that there a firm attachment with the bone cortex in the middle of the femur. Therefore, the Solution prosthesis is one of the most commonly used and most effective prostheses in total hip arthroplasty worldwide.

Patient Concerns: We reported a case of a 54-year-old female patient with periprosthetic femoral fractures after hip arthroplasty. Read More

Eur Rev Med Pharmacol Sci 2022 Jun;26(12):4197-4206

Department of Orthopedics, The Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing, People's Republic of China.

Objective: The aim of this paper was to evaluate the effects of robot-assisted core decompression combined with human umbilical cord-derived mesenchymal stem cell (hUC-MSC) transplantation for early-stage osteonecrosis of the femoral head (ONFH).

Patients And Methods: A retrospective analysis was performed on 18 patients with a total of 26 hips who were diagnosed with Association Research Circulation Osseous stage 2 avascular necrosis of the femoral head and who received core decompression combined with hUC-MSC transplantation. All surgeries were completed under robotic assistance. Read More

J Periodontal Implant Sci 2022 Jun;52(3):242-257

Experimental Therapy Department, Iraqi Center for Cancer and Medical Genetic Research, Mustansiriyah University, Baghdad, Iraq.

Purpose: This study investigated periodontal ligament (PDL) restoration in osseointegrated implants using stem cells.

Methods: Commercial pure titanium and zirconium oxide (zirconia) were coated with beta-tricalcium phosphate (β-TCP) using a long-pulse Nd:YAG laser (1,064 nm). Isolated bone marrow mesenchymal cells (BMMSCs) from rabbit tibia and femur, isolated PDL stem cells (PDLSCs) from the lower right incisor, and co-cultured BMMSCs and PDLSCs were tested for periostin markers using an immunofluorescent assay. Read More

Bone Joint J 2022 Jul;104-B(7):875-883

Sint Maartenskliniek, Nijmegen, the Netherlands.

Aims: Both the femoral and tibial component are usually cemented at revision total knee arthroplasty (rTKA), while stems can be added with either cemented or press-fit (hybrid) fixation. The aim of this study was to compare the long-term stability of rTKA with cemented and press-fitted stems, using radiostereometric analysis (RSA).

Methods: This is a follow-up of a randomized controlled trial, initially involving 32 patients, of whom 19 (nine cemented, ten hybrid) were available for follow-up ten years postoperatively, when further RSA measurements were made. Read More