<- Home <- Arhive <- Vol. 29, Issue 3, September 2021



Rom J Leg Med29(3)255-260(2021)
DOI:10.4323/rjlm.2021.255
© Romanian Society of Legal Medicine


TOPOGRAPHY AND FUNCTIONAL IMPORTANCE OF THE GAPS/JOINTS WITHIN THE CARTILAGE OF THE FIRST RIB – ON THE BIOMECHANICS OF THE OSSIFICATION OF THE COSTAL CARTILAGE

K. Saternus, K. Dabbert, B. Salamat, G. K. Wighton


Abstract: Background. Rotatory forces arising from respiratory excursions are partly being absorbed by the cartilage of the first rib by way of elastical deformation. Contrary to this, the connection between respiration and function of gaps/joints (g/j) on both sides at the cartilage-bone-border-region are only less investigated. Though these are anatomically known, but so far neither they have been completely described nor has their influence on the costal cartilage been investigared systematically. This shall be the aim of this investigation.
Methods. We present the results of a qualitative post mortem preparative/radiological investigation: N=60, age range 7-102 years, 37 preparations from males, 23 from females. Technically step-cuts of 5-7 mm thickness each were obtained from both sterno-costo-clavicular joints (SCCJ) by use of a highspeed band-saw. The cuts were photographed, x-rayed and examined in magnification.
Results. g/j are not artefacts. Their topography is: osteo-chondral (type I), sterno-chondral (type II), bilateral (type III), and with direct cartilage-bone transition while aging medial (type IV). As in each other joint, also g/j are also subject to functional pronounced arthritic changes. The topography of the g/j defines the ossification of the costal cartilage to a large extent, as well as the growth of the width of the manubrium sterni.
Conclusions. By g/j the articular cavity oft he SCCJ ́s receives the required stability towards shearing forces, as they are produced by inspiration. As the cartilage of the first rib, depending on topography and morphology of the g/j, ossifies, the articular cavity shows a variable basic structure. Whether these significant strucural differences in the kinetic chain of the thorax can also be/of clinical importance, this shall be left to future functional-clinical investigations.
Keywords: thorax, respiration, costal cartilage, costal cartilage gaps, biomechanics, ossification



Full Text in PDF
© 2008-2022 Romanian Society of Legal Medicine. All rights reserved
created by cooz.ro