liu.seSök publikationer i DiVA
Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Simultaneous changes in bone mineral density and articular cartilage in a rabbit meniscectomy model of knee osteoarthrosis
Linköpings universitet, Institutionen för nervsystem och rörelseorgan, Ortopedi och Idrottsmedicin. Linköpings universitet, Hälsouniversitetet.
Linköpings universitet, Institutionen för nervsystem och rörelseorgan, Ortopedi och Idrottsmedicin. Linköpings universitet, Hälsouniversitetet.
Linköpings universitet, Institutionen för medicin och hälsa, Endokrinologi. Linköpings universitet, Hälsouniversitetet.
Linköpings universitet, Institutionen för nervsystem och rörelseorgan, Ortopedi och Idrottsmedicin. Linköpings universitet, Hälsouniversitetet.
2000 (Engelska)Ingår i: Osteoarthritis and Cartilage, ISSN 1063-4584, E-ISSN 1522-9653, Vol. 8, nr 3, s. 197-206Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Objective It was hypothesized that increased bone mineral density of the medial proximal tibia would precede or coincide with the development of more severe cartilage changes after meniscectomy.

Methods In a rabbit knee model, mineral density of subchondral bone and changes of articular cartilage were monitored 13 to 40 weeks after medial meniscectomy or a sham operation.

Results Both procedures resulted in a decrease of bone mineral density, especially of the medial proximal tibia, which persisted up to 40 weeks (P< 0.02–0.0007). Meniscectomy induced cartilage changes typical for osteoarthrosis (P< 0.009), which progressed over time on the posterior aspect of the medial tibial plateau (P< 0.009), which is physiologically covered by the meniscus, but the procedure also induced iatrogenic changes which were located mainly on the anterior aspect of the concerned compartment, and which did not progress or develop to osteoarthrosis.

Conclusions The data suggest that the cartilage changes after meniscectomy in this animal model are caused by the surgical trauma, subsequent limb misuse, and altered load distribution, and initially associated by a decrease not an increase in bone mineral density of the proximal tibia. Moreover, the cartilage changes progressed without a simultaneous increase of the bone mineral density at corresponding sites.

Ort, förlag, år, upplaga, sidor
2000. Vol. 8, nr 3, s. 197-206
Nationell ämneskategori
Medicin och hälsovetenskap
Identifikatorer
URN: urn:nbn:se:liu:diva-27749DOI: 10.1053/joca.1999.0290Lokalt ID: 12490OAI: oai:DiVA.org:liu-27749DiVA, id: diva2:248301
Tillgänglig från: 2009-10-08 Skapad: 2009-10-08 Senast uppdaterad: 2017-12-13Bibliografiskt granskad
Ingår i avhandling
1. Early knee osteoarthrosis after meniscectomy: studies in rabbits
Öppna denna publikation i ny flik eller fönster >>Early knee osteoarthrosis after meniscectomy: studies in rabbits
2003 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

Post-traumatic osteoarthrosis develops after intraarticular injuries. It is a disease, which affects both articular cartilage and subchondral bone, and progresses over 10-20 years. Irreversible damage has often occurred by the time clinical diagnosis is possible. More knowledge about the early phase of the disease might yield measures to detect and delay or even prevent progression. This thesis evaluates changes in articular cartilage and subchondral bone at an early stage of post-traumatic osteoarthrosis.

Simultaneous changes in articular cartilage and subchondral bone were evaluated 3 to 40 weeks post-operatively in a rabbit meniscectomy model for post-traumatic osteoarthrosis. Rabbits were meniscectomized in the right knee and sham-operated in the left knee. Osteoarthrotic cartilage changes were evaluated by histology. Changes in the subchondral bone were evaluated by histology, scintimetry and dual-energy X-ray absorptiometry (DEXA). Joint space narrowing, and its utility as diagnostic tool at early stages of osteoarthrosis, was assessed with weight-bearing radiographs. The prognostic value of transforming growth factor-ßI (TGF-ß1) and proteoglycan fragment concentrations in the joint fluid at an early stage was also assessed.

We found slight cartilage changes and an increased metabolic activity in the subchondral bone as early as 3 weeks after meniscectomy. However, sham-operated knees displayed similar changes, although to a lesser degree. Cartilage fibrillation progressed at areas of high load within the meniscectomized knee joint. The subchondral bone showed a general response such as high scintimetric activity 3 weeks after surgery, and a decreased bone mineral density at later time points. Local adaptation in areas of high load within the subchondral bone was also seen. There was an increased osteoid content at the border between the cancellous bone and the marrow cavity already 3 weeks after meniscectomy, and at 13 weeks the subchondral bone plate was thickened. This thickening of the bone plate persisted up to 40 weeks. Joint space narrowing occurred after removal of the meniscus, but weight-bearing radiographs were not sensitive enough to measure early cartilage changes. Increased concentration of TGF-ß1 in the joint fluid at 3 weeks after surgery was associated with a higher degree of histological osteoarthrotic changes at a later time point.

Simultaneous changes in both cartilage and bone were apparent already 3 weeks after surgery, indicating that both tissues are involved from a very early stage. The localisation of cartilage changes illustrates that mechanical consequences of meniscectomy play a crucial role in progression of the disease. Surgical trauma resulted in increased release of TGF-ß1 at 3 weeks after surgery. This was found to be indicative for the severity of later osteoarthrosis. Thus, factors solely associated with the surgical trauma may also be important for the progression of osteoarthrosis.

Ort, förlag, år, upplaga, sidor
Linköping: Linköpings universitet, 2003. s. 55
Serie
Linköping University Medical Dissertations, ISSN 0345-0082 ; 795
Nationell ämneskategori
Medicin och hälsovetenskap
Identifikatorer
urn:nbn:se:liu:diva-28031 (URN)12791 (Lokalt ID)91-7373-553-1 (ISBN)12791 (Arkivnummer)12791 (OAI)
Disputation
2003-06-05, Elsa Brändströms sal, Hälsouniversitet, Linköping, 13:00 (Svenska)
Opponent
Tillgänglig från: 2009-10-08 Skapad: 2009-10-08 Senast uppdaterad: 2012-10-10Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltext

Personposter BETA

Messner, KarolaFahlgren, AnnaAndersson, Britt-Marie

Sök vidare i DiVA

Av författaren/redaktören
Messner, KarolaFahlgren, AnnaAndersson, Britt-Marie
Av organisationen
Ortopedi och IdrottsmedicinHälsouniversitetetEndokrinologi
I samma tidskrift
Osteoarthritis and Cartilage
Medicin och hälsovetenskap

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 152 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf