The effect of a collar on primary stability of standard and undersized cementless hip stems: a biomechanical study.

Introduction: Aseptic loosening and periprosthetic fractures are main reasons for revision after THA. Quite different from most other stem systems, Corail cementless hip stems show better survival rates than their cemented counterpart, which can possibly be explained by the use of a collar. The study aimed to investigate primary stability with standard and undersized hip stems both collared and collarless.

Femoral Neck System versus Three Cannulated Screws for Fixation of Femoral Neck Fractures in Younger Patients: A Retrospective Cohort Study.

Objective: To compare the clinical results of a new femoral neck system (FNS) and cannulated compression screws (CCS) for the treatment of femoral neck fractures in younger patients.

Methods: Retrospective study was performed in younger patients with femoral neck fractures that were treated with FNS or CCS from August 2017 to August 2022. The hip functional outcomes were assessed with the Harris hip score (HHS).

Leukocyte esterase and alpha-defensin in periprosthetic joint infection: predictive quality and correlation in a prospective study.

Purpose: Periprosthetic joint infection (PJI) is a rare but serious complication of total joint arthroplasty (TJA). An accurate diagnosis of PJI preoperatively does not exist. Alpha-defensin (AD) is a proven and common indicator.

Evaluation of modified and newly applied patella height indices in primary total knee arthroplasty.

Objective: The aim of this radiological study was to compare several relevant modified and newly applied patella height indices (PHI) in navigated primary total knee arthroplasty (TKA) to determine intra- and interobserver reliability in order to give a recommendation for clinical application in measuring patella height (PH) in primary TKA.

Materials And Methods: A retrospective data analysis assessing different PHI (modified Insall-Salvati index (mISI), Caton-Deschamps index (mCDI), Blackburne-Peel index (mBPI), Plateau-Patella Angle (mPPA); Miura-Kawaramura index (MKI), Knee-Triangular index (KTI)) on lateral knee radiographs was performed by two blinded observers using the same software three months pre- and postoperatively. Concordance correlation coefficient and Pearson's correlation respectively were determined for intra- and interobserver rating as well as a categorization according to Landis and Koch and Cohen.

Risk of Periprosthetic Joint Infection after Posttraumatic Hip Arthroplasty following Acetabular Fractures.

Background: Raised complication rates have been reported for total hip arthroplasty (THA) in posttraumatic hip joints after acetabular fractures with prior open reduction and internal fixation (ORIF). The present study evaluated (I) postoperative surgical site infection and the risk of early infection following THA in posttraumatic hip joints after acetabular fractures and (II) the discriminatory ability of preoperative C-reactive protein (CRP) blood levels for periprosthetic joint infection (PJI).

Materials And Methods: Patients were included who had undergone THA (2014-2019) after prior ORIF, and nonsurgically treated acetabular fractures.