Functional recovery after two-stage short-interval revision of chronic periprosthetic knee joint infection.

PURPOSE: The objective of this study was the functional recovery analysis of patients treated in two-staged short-interval procedure due to knee periprosthetic joint infection (PJI). MATERIALS AND METHODS: In the period from January 2015 to December 2018, a two-stage short-interval revision TKA was performed in 35 patients with PJI. Synovial fluid analysis, tissue samples and sonication method were used to diagnose PJI. Active range of motion (AROM) and Hospital for Special Surgery (HSS) score were analysed. RESULTS: Functional recovery analysis demonstrated higher AROM and HSS score after the revision TKA. Median pre-operative active flexion motion was 80° with full active extension, and median post-operative active flexion was 105° with full active extension. Median HSS score pre-operatively was 22 and post-operatively was 48. Isolated bacteria in both tissue and sonication fluid were S. epidermidis (27%) and other coagulase-negative staphylococci (25%), followed by S. aureus (10%). CONCLUSION: Two-stage short-interval procedure of chronic knee PJI significantly improved functional status of patients in a short period of time. Thirty three out of 35 patients returned to their everyday activities. Adequate surgical technique and implant selection can lead to satisfactory functional outcome.

Bone allograft provides bone healing in the medial opening high tibial osteotomy.

Various materials are used to fill osteotomy defects created in the medial opening wedge high tibial osteotomy (MOWHTO). Our hypothesis was that a bone allograft would provide the osteotomy site bone healing within the expected time. We performed the MOWHTO using a cancellous bone allograft in 310 knees in 284 patients between 2000 and 2005. Internal fixation was achieved with a T-profile AO plate. Preoperative and postoperative radiographic measurements were taken and statistically processed. All patients were followed up for a period ranging from three to eight years, or 5.9 years on average. Implanted cancellous bone allografts

Flat-footedness is not a disadvantage for athletic performance in children aged 11 to 15 years.

OBJECTIVE: Because the controversy about the relation of foot morphology and foot function is still present, we find it surprising that there are no studies published dealing with motor skills and athletic performance in flat-footed school children. Our aim in this study was to determine if there is an association between the degree of foot flatness and several motor skills that are necessary for sport performance. METHODS: The feet of 218 children aged 11 to 15 years were scanned, and the arch index was determined. The value of the arch index was corrected for the influence of age, and then the entire sample was categorized into 4 groups according to the flatness of their feet. The children were tested for eccentric-concentric contraction and hopping on a Kistler force platform, speed-coordination polygon (Newtest system), balance (3 tests), toe flexion (textile crunching), tiptoe standing angle, and repetitive leg movements. Altogether, 17 measures of athletic performance were measured. RESULTS: No significant correlations between the arch height and 17 motor skills were found. Categorizing the sample into 4 groups did not reveal any differences between the groups in athletic performance. Also, several multivariate analysis of variance sets of multiple independent variables referring to a particular motor ability were not found to be significant. The differences were not found even after comparing only the 2 extreme groups, meaning children with very low and children with very high arches. CONCLUSIONS: No disadvantages in sport performance originating from flat-footedness were confirmed. Children with flat and children with "normal" feet were equally successful at accomplishing all motor tests; thus, we suggest that there is no need for treatment of flexible flat feet with the sole purpose of improving athletic performance, as traditionally advised by many.