The frequency of cartilage lesions in non-injured knees with symptomatic meniscus tears: results from an arthroscopic and NIR- (near-infrared) spectroscopic investigation.

Introduction: Are symptomatic tear injuries to the menisci of the knee frequently or always associated with cartilage damage to the corresponding articular surfaces and other joint surfaces, respectively?

Methods: A total of 137 patients (medial n = 127; lateral n = 10) underwent a meniscus resection. These patients showed no signs of a clear radiographic arthrosis and no MRI-detectable cartilage lesions > grade II. Traumatic injury was ruled out with a thorough medical history.

Novel approach for the prediction of cell densities and viability in standardized translucent cell culture biochips with near infrared spectroscopy.

Near infrared spectroscopy is a rapid and nondestructive method for compositional analysis of biological material. The technology is widely used within bioreactors and possesses potential as a standardized method for quality control in miniaturized microfluidic cell culture systems. Here, we established a method for quantification of cell density and viability of adherent HepaRG cells cultured in a translucent, miniaturized cell culture biochip.

[Characteristics of Focal Degenerative Cartilage Lesions in the Knee Joint. A Radiologic, Spectroscopic, Histological and Biochemical Study].

Objective: The aim of this study was to perform a macroscopic, spectroscopic and biochemical/histological examination of the defect margins of grade IIIb cartilage lesions in the patella, the medial femoral condyle, the corresponding articular surface and the remaining cartilage surfaces of the knee joint. Our null hypothesis was that there would be no difference in characteristics between the cartilage surrounding the defect, the corresponding articular surface and the remaining articular surfaces of the knee joint on the one hand and the cartilage within the defect on the other.

Method: The study included ten patients treated for focal cartilage lesions (ICRS classification grade IIIb) by autologous cartilage transplantation (ACT).

[Histological, biochemical and spectroscopic changes of articular cartilage in osteoarthritis: is there a chance for spectroscopic evaluation?].

Background: Non-destructive techniques for the detection and classification of pathological changes of cartilage in the early stages of osteoarthritis are required for arthroscopic and open surgery of joints. Biochemical and histological changes in cartilage with different degrees of destruction were analysed and correlated to changes in the spectroscopic characteristics of cartilage.

Patients, Material And Methods: 24 patients (n = 25 knees) with severely destructed knee joints received total knee replacement.

Is there a correlation between biophotonical, biochemical, histological, and visual changes in the cartilage of osteoarthritic knee-joints?

The aim of this study was to detect characteristic structural changes in the cartilage composition of osteoarthritis (OA), hereby improving the arthroscopic identification of cartilage pathology by the use of a non-destructive technique - NIRS (Near-Infrared Spectroscopy). 682 cartilage samples out of 25 knees with OA were classified visually, using the ICRS system, biophotonically, histologically (n = 66), using the Score of Mankin and the Score of Otte, and biochemically (n = 616), determining the content of glycosaminoglycan (GAG) and hydroxyproline (HP). Significant correlations were found between biophotonical, histological, biochemical and visual characteristics of cartilage lesions.