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Samenvatting Tendinopathie (msk 5)

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Dit is een samenvatting van het hoofdstuk over tendinopathie bij het vak MSK 5.

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Uploaded on
May 16, 2020
Number of pages
9
Written in
2019/2020
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MSK 5: Tendinopathie
Vaak aangetaste regio’s
 Achillespees  mid-tendon
 Patellapees  osteotendineus
 Rotator cuff
 Elleboog  osteotendineus

1 Anatomie en samenstelling van de pees




Interfasciculaire ruimte

Interfasciculaire cellen, fibroblasten,

vasculaire cellen, extracellulaire matrix



Fasciculaire ruimte

Tenocyten, extracellulaire matrix



3 belangrijke componenten
1.Peescellen
Zorgen voor aanmaak van procollageen en grondsubstantie  bepalen samenstelling pees

Fibroblasten (interfasciculaire ruimte)

 Onvolgroeide tenocyten
 Hoger metabolisme, zuurstofafhankelijk (aëroob)
 Herstelcellen ingezet bij weefselherstel  verdwijnen bij ouder worden

1

, Tenocyten (fasciculaire ruimte)

 Laag metabolisme, anaërobe werking
 Traag herstelvermogen  toename bij ouder worden: trager herstel, betere werking in
zuurstofarm milieu
 Mechanotransductie: aanmaak proteoglycanen bij toenemende belasting

2.Extracellulaire matrix (= grondsubstantie)
= waterhoudende (60-80%) gel tussen cellen en collageen

 Ondersteunen collageen
 Bevat proteoglycanen
- sterke binding met water door negatieve lading
- vormt stabiele gel
 Bevat elastische vezels (1-10%)
- bestaat uit elastine + proteoglycanen
- elastische kenmerken en weerstand tegen vermoeidheid

Functies:

 Smering/glijding tussen collageenfibrillen
 Voedingsstoffen en gassen transporteren tussen vezels
 Herstel

3.Collageen
= soort proteïne met rigide structuur dat belangrijk onderdeel vormt van bindweefsel

 Verschillende collageenmoleculen gaan zich parallel met elkaar oriënteren en samenwerken
om fibrillen/fascikels te vormen.
 Aangemaakt door peescellen
 Max 2% elastine: visco-elastische eigenschappen

Types:

 Type I: trekkrachten (95% van normale pees)
 Type III: drukkrachten

! Bij ouderen of in geval van tendinopathie: type I  type III

Macroscopische regio’s
1) Musculotendineuze overgang
- vaak directe overgang
- pees loopt soms tot zeer ver in spierbuik
2) Tendineuze deel
3) Osteotendineuze overgang
- krachten overzetten naar bot
- enthesis = soort verbindingsweefsel (stiffness 100x > tendon)
- fibreuze verbinding (rechtstreeks op bot) of complexere fibrocartilagineuze overgang
- letsel in deze regio = insertietendinopathie

! 1/3 bloedvoorziening in vgl met spierweefsel => trager herstel, witte kleur


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