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Bone & Joint Open
Vol. 5, Issue 8 | Pages 644 - 651
7 Aug 2024
Hald JT Knudsen UK Petersen MM Lindberg-Larsen M El-Galaly AB Odgaard A

Aims

The aim of this study was to perform a systematic review and bias evaluation of the current literature to create an overview of risk factors for re-revision following revision total knee arthroplasty (rTKA).

Methods

A systematic search of MEDLINE and Embase was completed in accordance with the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) guidelines. The studies were required to include a population of index rTKAs. Primary or secondary outcomes had to be re-revision. The association between preoperative factors and the effect on the risk for re-revision was also required to be reported by the studies.


Orthopaedic Proceedings
Vol. 105-B, Issue SUPP_17 | Pages 21 - 21
24 Nov 2023
Hartmann KT Nielsen RL Mikkelsen F Ingmer H Kvich LA Aalbaek B Odgaard A Jensen HE Lichtenberg M Bjarnsholt T Jensen LK
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Aim

To make an inoculum for induction of Implant-Associated Osteomyelitis (IAO) in pigs based on bacterial aggregates resembling those found on the human skin, i.e. aggregates of 5–15 µm with low metabolic activity. The aggregates were evaluated and compared to a standard planktonic bacterial inoculum.

Method

The porcine Staphylococcus aureus strain S54F9 was cultured in Tryptone Soya Broth for seven days. Subsequently, the culture was filtered through cell strainers with pore sizes of 15 µm and 5 µm, respectively. The fraction of 5–15 µm aggregates in the top of the 5 µm filter was collected as the aggregate-inoculum. The separation of aggregates into different size fractions was evaluated by light microscopy. The metabolism of the aggregate-inoculum and a standard overnight planktonic inoculum was evaluated with isothermal microcalorimetry. In total, six female minipigs were allocated into three groups (n=2), receiving different inoculums. Group A: overnight planktonic inoculum; 104 CFU S. aureus (S54F9), Group B: seven days old 5–15 µm aggregate-inoculum; 104 CFU S. aureus (S54F9), Group C: saline. All inoculums were placed in a pre-drilled implant cavity in the right tibia of the pig and a sterile stainless-steel implant was inserted. The pigs were euthanized seven days after surgery. Postmortem macroscopic pathology, microbiology, computed tomography and histopathology were performed.


Orthopaedic Proceedings
Vol. 101-B, Issue SUPP_14 | Pages 82 - 82
1 Dec 2019
Hesselvig AB Odgaard A Arpi M Bjarnsholt T Madsen F
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Aim

The primary aim of this study was to examine whether the use of iodine impregnated incision drape (IIID) decreased the risk of periprosthetic joint infections (PJIs). The secondary aim was to investigate whether intraoperative contamination could predict postoperative infection.

PJI is a devastating incident for the patients and in a population that is getting older and the incidence of arthroplasty surgery is rising it is vital to keep the infection rate as low as possible. Despite prophylactic measures as pre-operative decontamination, antisepsis and prophylactic antibiotics the infection rate has been constant at 1–2%.

Method

We performed a transregional, prospective, randomized two arm study (IIID vs control group) of 1187 patients undergoing primary knee arthroplasty surgery. A database with patient demographics and surgical observations was established with the purpose of following the patients for ten years. Patients, who developed an infection within the first year of surgery were analyzed for correlation with the intraoperative bacterial findings and the use of IIID.


Bone & Joint Research
Vol. 1, Issue 9 | Pages 225 - 233
1 Sep 2012
Paulsen A Odgaard A Overgaard S

Objectives

The Oxford hip score (OHS) is a 12-item questionnaire designed and developed to assess function and pain from the perspective of patients who are undergoing total hip replacement (THR). The OHS has been shown to be consistent, reliable, valid and sensitive to clinical change following THR. It has been translated into different languages, but no adequately translated, adapted and validated Danish language version exists.

Methods

The OHS was translated and cross-culturally adapted into Danish from the original English version, using methods based on best-practice guidelines. The translation was tested for psychometric quality in patients drawn from a cohort from the Danish Hip Arthroplasty Register (DHR).


Orthopaedic Proceedings
Vol. 84-B, Issue SUPP_I | Pages 16 - 16
1 Mar 2002
Ding M Odgaard A Hvid I
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Osteoarthrosis (OA) stands alongside cancer and heart disease as one of the major causes of suffering and disability amongst the elderly. Changes related to OA occur in all elements of the joint, and there are indications that sub-chondral cancellous bone plays a primary role in the cartilage degeneration in OA. Most previous investigations have been focused on moderate and late OA, whereas little is known about the changes in cancellous bone microstructure in human early OA. This study quantified cancellous bone microstructure in early-stage OA using three-dimensional (3D) methods.

Subchondral cancellous bone specimens, produced from 10 human post-mortem early-stage osteoarthrotic (OA) proximal tibiae and 10 normal age- and gender-matched proximal tibiae, were allocated to 4 groups: medial OA, lateral control, normal medial control, and normal lateral control. OA initiates mostly at the medial condyle, and histological analysis was done to confirm this change. The cylindrical specimens were micro-computed tomography (micro-CT) scanned. From accurate 3D data sets, structural parameters were determined by means of true, unbiased and assumption-free 3D methods. The data were assessed statistically, and a p< 0.05 was considered significant.

Our data supported the hypothesis that significant microstructural changes – other than density changes – occur in early-stage OA cancellous bone. OA cancellous bone is markedly plate-like, less anisotropic, less interconnected, but lower in mechanical properties which suggests a disorganisation in the microstructure as OA initiation. Structure model type best explains the mechanical properties for the OA and the normal controls. However, the determination coefficients (R2) for the OA group are largely reduced. These results indicate significant property and quality deterioration in early-stage OA subchondral cancellous bone.