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Titolo:
THE INTERFACE BETWEEN BONE AND TENDON AT AN INSERTION SITE - A STUDY OF THE QUADRICEPS TENDON INSERTION
Autore:
CLARK J; STECHSCHULTE DJ;
Indirizzi:
UNIV WASHINGTON,DEPT ORTHOPAED,1959 NE PACIFIC ST,BOX 356500 SEATTLE WA 98195
Titolo Testata:
Journal of Anatomy
, volume: 192, anno: 1998,
parte:, 4
pagine: 605 - 616
SICI:
0021-8782(1998)192:<605:TIBBAT>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
MEDIAL COLLATERAL LIGAMENT; ARTICULAR-CARTILAGE; SECONDARY OSTEONS; CEMENT LINE; RABBIT KNEE; MORPHOLOGY; TISSUE; ATTACHMENTS; RAT;
Keywords:
ENTHESES; COLLAGEN; FIBROCARTILAGE; PATELLA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
26
Recensione:
Indirizzi per estratti:
Citazione:
J. Clark e D.J. Stechschulte, "THE INTERFACE BETWEEN BONE AND TENDON AT AN INSERTION SITE - A STUDY OF THE QUADRICEPS TENDON INSERTION", Journal of Anatomy, 192, 1998, pp. 605-616

Abstract

Traumatic avulsions of ligament or tendon insertions rarely occur at the actual interface with bone, which suggests that this attachment isstrong or otherwise protected from injury by the structure of the insertion complex. In this study we describe the terminal extent of quadriceps tendon fibres where they insert into the patellae of adult rabbits, humans, dogs and sheep. Specimens were examined by scanning electron microscopy (SEM) and light microscopy (LM). To facilitate tracing of tendon fibres the specimens were decalcified for SEM, and polarised light microscopy (PLM) was used in the LM segment of the study. By SEMit was possible to identify mature bone by the presence of osteocytesand a lamellar organisation. PLM and SEM showed that, unlike tendon fibres elsewhere, those in the calcified fibrocartilage were not crimped. No specific cement line was identified by SEM. Tendon fibres interdigitated among separate bone lamellar systems, (osteons or marrow spaces), but did not merge with the collagen systems of individual lamellae. The interdigitation was more extensive and the margin between tendon and bone was less distinct in the anterior third of the insertion. The segment of calcified tendon which interdigitated with bone stained less intensely blue and was less cellular than the more proximal calcified fibrocartilage zone adjacent to the tidemark. Lamellar collagen fibres of the bony trabeculae in the anterior patella were unusually parallel and longitudinal in orientation, making distinction of inter-posed tendon fibres difficult on LM and PLM sections. LM, SEM and transmission electron microscopy of rabbit patellae at birth revealed that anterior quadriceps tendon fibres extended over the patella in a fibrous cellular layer. By 2 wk of age, this layer had acquired chondroid features (i.e. cell lacunae and metachromasia) and contained vessels extending from patellar marrow. At 6 wk of age, part of this fibrocartilaginous layer was replaced by mature bone and osteoid. In the young adult animal, the quadriceps tension interdigitates extensively with the patellar bone. This segment of the insertion is perhaps the remnant ofcalcified fibrocartilage which has been remodelled by bone formation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 10/07/20 alle ore 07:19:45