1,441 research outputs found
Cartilage restoration of patellofemoral lesions: a systematic review
Purpose
This study aimed to systematically analyze the postoperative clinical, functional, and imaging outcomes, complications, reoperations, and failures following patellofemoral cartilage restoration surgery.
Methods
This review was conducted according to the guidelines of Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA). PubMed, EMBASE, and Cochrane Library databases were searched up to August 31, 2018, to identify clinical studies that assessed surgical outcomes of patellofemoral cartilage restoration surgery. The Methodological Index for Non-Randomized Studies (MINORS) was used to assess study quality.
Results
Forty-two studies were included comprising 1,311 knees (mean age of 33.7 years and 56% males) and 1,309 patellofemoral defects (891 patella, 254 trochlear, 95 bipolar, and 69 multiple defects, including the patella or trochlea) at a mean follow-up of 59.2 months. Restoration techniques included autologous chondrocyte implantation (56%), particulated juvenile allograft cartilage (12%), autologous matrix-induced chondrogenesis (9%), osteochondral autologous transplantation (9%), and osteochondral allograft transplantation (7%). Significant improvement in at least one score was present in almost all studies and these surpassed the minimal clinically important difference threshold. There was a weighted 19%, 35%, and 6% rate of reported complications, reoperations, and failures, respectively. Concomitant patellofemoral surgery (51% of patients) mostly did not lead to statistically different postoperative outcomes.
Conclusion
Numerous patellofemoral restoration techniques result in significant functional improvement with a low rate of failure. No definitive conclusions could be made to determine the best surgical technique since comparative studies on this topic are rare, and treatment choice should be made according to specific patient and defect characteristics
FRP-to-masonry bond durability assessment with infrared thermography method
The bond behavior between FRP composites and masonry substrate plays an important role
in the performance of externally bonded reinforced masonry structures. Therefore, monitoring
the bond quality during the application and subsequent service life of a structure is of crucial
importance for execution control and structural health monitoring. The bond quality can change
during the service life of the structure due to environmental conditions. Local detachments may
occur at the FRP/substrate interface, affecting the bond performance to a large extent. Therefore, the use of expedite and efficient non-destructive techniques for assessment of the bond quality
and monitoring FRP delamination is of much interest.
Active infrared thermography (IR) technique was used in this study for assessing the bond
quality in environmentally degraded FRP-strengthened masonry elements. The applicability and
accuracy of the adopted method was initially validated by localization and size quantification of
artificially embedded defects in FRP-strengthened brick specimens. Then, the method was used
for investigating the appearance and progression of FRP delaminations due to environmental
conditions. GFRP-strengthened brick specimens were exposed to accelerated hygrothermal
ageing tests and inspected periodically with the IR camera. The results showed environmental
exposure may produce large progressive FRP delaminations.Fundação para a Ciência e Tecnologi
Malacological survey of Biomphalaria snails in municipalities along the Estrada Real in the southeast of the State of Minas Gerais, Brazil
An overview of the current status of CMB observations
In this paper we briefly review the current status of the Cosmic Microwave
Background (CMB) observations, summarising the latest results obtained from CMB
experiments, both in intensity and polarization, and the constraints imposed on
the cosmological parameters. We also present a summary of current and future
CMB experiments, with a special focus on the quest for the CMB B-mode
polarization.Comment: Latest CMB results have been included. References added. To appear in
"Highlights of Spanish Astrophysics V", Proceedings of the VIII Scientific
Meeting of the Spanish Astronomical Society (SEA) held in Santander, 7-11
July, 200
Thoracoabdominal mobility evaluation by photogrammetry in newborns after expiratory flow increase technique
Genetic variability in Brazilian populations of Biomphalaria straminea complex detected by simple sequence repeat anchored polymerase chain reaction amplification
Technical solutions to improve global sustainable management of waste electrical and electronic equipment (WEEE) in the EU and China
- …