Atypical Periprosthetic Femoral Fracture Associated With Prolonged Bisphosphonate Therapy: A Two-Centered Retrospective Case Series and Literature Review.

To date, atypical periprosthetic femoral fractures (APFFs) are not well-understood due to a relatively small number of studies on the topic. Moreover, there is a paucity of guidance regarding the appropriate treatment strategy. We would therefore like to present and analyze a series of five APFF cases (one incomplete APFF and four complete APFFs) that were treated in two university hospitals; a review of the literature is also provided.

Effectiveness of Periarticular Injection After Bipolar Hemiarthroplasty for Displaced Femoral Neck Fracture in Elderly Patients: A Double Blinded Randomized, Controlled Study.

Background: Bipolar hemiarthroplasty is a standard treatment for displaced femoral neck fracture in elderly with a normal acetabulum. Several studies have shown controversial results regarding postoperative visual analogue scale, opioid consumption, and the effectiveness of periarticular injection in hip arthroplasty. The purpose of this study is going to identify the effectiveness of periarticular injection after bipolar hemiarthroplasty compared with the patients treated with conventional pain control.

Can urinary CTX-II be a biomarker for knee osteoarthritis?

Background: Early diagnosis of knee osteoarthritis (OA) remains a diagnostic challenge. Urinary C-terminal cross-linked telopeptide of type II collagen (urinary CTX-II) is one of the potential OA biomarkers. However, conclusive evidence regarding the use of this biomarker as a tool for early diagnosis is still lacking.

Subsidence of Hydroxyapatite-Coated Femoral Stem in Dorr Type C Proximal Femoral Morphology.

Background: Good bone quality and proper proximal femoral morphology are thought to be necessary for tapered design, cementless femoral stems to resist subsidence. Using tapered, cementless stem for patients with stovepipe morphology or Dorr type C is controversial. The purpose of this study is to analyze (1) subsidence of the fully hydroxyapatite (HA)-coated, tapered, cementless stem in different morphology according to Dorr classification, (2) subsidence of the stem related to radiographic canal-fill ratio.

10-Year patient satisfaction compared between computer-assisted navigation and conventional techniques in minimally invasive surgery total knee arthroplasty.

Background: Both minimally invasive surgery (MIS) and computer-assisted surgery (CAS) in total knee arthroplasty have been scientifically linked with surgical benefits. However, the long-term results of these techniques are still controversial. Most surgeons assessed the surgical outcomes with regard to knee alignment and range of motion, but these factors may not reflect subjective variables, namely patient satisfaction.

Chemistry-driven structural alterations in short-term retrieved ceramic-on-metal hip implants: Evidence for in vivo incompatibility between ceramic and metal counterparts.

Ceramic-on-metal (CoM) hip implants were reported to experience lower wear rates in vitro as compared to metal-on-metal (MoM) bearings, thus hinting metal-ion release at lower levels in vivo. In this article, we show a spectroscopic study of two short-term retrieval cases of zirconia-toughened alumina (ZTA) femoral heads belonging to CoM hip prostheses, which instead showed poor wear performances in vivo. Metal contamination and abnormally high fractions of tetragonal-to-monoclinic (t→m) polymorphic transformation of the zirconia phase could be found on both ZTA heads, which contrasted with the optimistic predictions of in vitro experiments.

Rotational alignment of femoral component between custom cutting block and conventional technique in total knee arthroplasty.

Objective: Rotation of femoral components could be optimized to improve function and durability of the knee joint. The purpose of the present study was to assess rotational alignment of femoral component comparing between CT-based, custom cutting blocks and the contemporary total knee arthroplasty, instrument technique.

Material And Method: The prospective control study of 80 patients underwent total knee arthroplasty by using PFC Sigma PS total knee design.

Comparative study of femoral sizing between intraoperative measurement and CT-based PSI in total knee arthroplasty.

Background: Appropriate femoral sizing in total knee arthroplasty (TKA) is an important factor for flexion. An oversized femoral component will decrease flexion gap and postoperative flexion. By using custom cutting blocks technique with computed tomography (CT) imaging to design cutting blocks will help determine sizing of each patient.

The accuracy of component alignment in custom cutting blocks compared with conventional total knee arthroplasty instrumentation: prospective control trial.

Background: The purpose of this study was to assess whether custom cutting blocks improve accuracy of component alignment compared to conventional TKA instrumentation.

Methods: Eighty primary TKA patients were enrolled in an open-label randomized prospective clinical trial and were divided into two groups, 40 custom cutting blocks and 40 conventional TKA instrumentations. The primary outcome was prosthetic alignment with respect to mechanical axis and epicondylar axis.

Lower extremities' postthrombotic syndrome after total knee arthroplasty.

Background: Deep venous thrombosis (DVT) is a disease associated with high morbidity in 40-60% patients who underwent Total Knee Arthroplasty (TKA). Postthrombotic syndrome (PTS) is a common long-term complication that may develop within 6 months or more than 2 years after episode of DVT.

Objective: To examine the prevalence of PTS in patients who had history of previous DVT and non-previous DVT at least 2-year follow-up period after TKA.