Abstract
The effect of pulsed electromagnetic fields (PEMFs) on the integration of osteochondral autografts was evaluated in sheep. After osteochondral grafts were performed, the animals were treated with PEMFs for 6 h/day or sham-treated. Six animals were sacrificed at 1 month. Fourteen animals were treated for 2 months and sacrificed at 6 months. At 1 month, the osteogenic activity at the transplant-host subchondral bone interface was increased in PEMF-treated animals compared to controls. Articular cartilage was healthy in controls and stimulated animals. At 6 months, complete resorption was observed in four control grafts only. Cyst-like resorption areas were more frequent within the graft of sham-treated animals versus PEMF-treated. The average volume of the cysts was not significantly different between the two groups; nevertheless, analysis of the variance of the volumes demonstrated a significant difference. The histological score showed no significant differences between controls and stimulated animals, but the percentage of surface covered by fibrous tissue was higher in the control group than in the stimulated one. Interleukin-1 and tumor necrosis factor-α concentration in the synovial fluid was significantly lower, and transforming growth factor-β1 was significantly higher, in PEMF-treated animals compared to controls. One month after osteochondral graft implantation, we observed larger bone formation in PEMF- treated grafts which favors early graft stabilization. In the long term, PEMF exposure limited the bone resorption in subchondral bone; furthermore, the cytokine profile in the synovial fluid was indicative of a more favorable articular environment for the graft.
| Original language | English |
|---|---|
| Pages (from-to) | 631-642 |
| Number of pages | 12 |
| Journal | Journal of Orthopaedic Research |
| Volume | 26 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - May 2008 |
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Keywords
- Cartilage repair
- Cytokines
- Osteochondral autografts
- Pulsed electromagnetic fields
ASJC Scopus subject areas
- Medicine(all)
- Orthopedics and Sports Medicine
Cite this
Cartilage repair with osteochondral autografts in sheep : Effect of biophysical stimulation with pulsed electromagnetic fields. / Benazzo, Franco; Cadossi, Matteo; Cavani, Francesco; Fini, Milena; Giavaresi, Gianluca; Setti, Stefania; Cadossi, Ruggero; Giardino, Roberto.
In: Journal of Orthopaedic Research, Vol. 26, No. 5, 05.2008, p. 631-642.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Cartilage repair with osteochondral autografts in sheep
T2 - Effect of biophysical stimulation with pulsed electromagnetic fields
AU - Benazzo, Franco
AU - Cadossi, Matteo
AU - Cavani, Francesco
AU - Fini, Milena
AU - Giavaresi, Gianluca
AU - Setti, Stefania
AU - Cadossi, Ruggero
AU - Giardino, Roberto
PY - 2008/5
Y1 - 2008/5
N2 - The effect of pulsed electromagnetic fields (PEMFs) on the integration of osteochondral autografts was evaluated in sheep. After osteochondral grafts were performed, the animals were treated with PEMFs for 6 h/day or sham-treated. Six animals were sacrificed at 1 month. Fourteen animals were treated for 2 months and sacrificed at 6 months. At 1 month, the osteogenic activity at the transplant-host subchondral bone interface was increased in PEMF-treated animals compared to controls. Articular cartilage was healthy in controls and stimulated animals. At 6 months, complete resorption was observed in four control grafts only. Cyst-like resorption areas were more frequent within the graft of sham-treated animals versus PEMF-treated. The average volume of the cysts was not significantly different between the two groups; nevertheless, analysis of the variance of the volumes demonstrated a significant difference. The histological score showed no significant differences between controls and stimulated animals, but the percentage of surface covered by fibrous tissue was higher in the control group than in the stimulated one. Interleukin-1 and tumor necrosis factor-α concentration in the synovial fluid was significantly lower, and transforming growth factor-β1 was significantly higher, in PEMF-treated animals compared to controls. One month after osteochondral graft implantation, we observed larger bone formation in PEMF- treated grafts which favors early graft stabilization. In the long term, PEMF exposure limited the bone resorption in subchondral bone; furthermore, the cytokine profile in the synovial fluid was indicative of a more favorable articular environment for the graft.
AB - The effect of pulsed electromagnetic fields (PEMFs) on the integration of osteochondral autografts was evaluated in sheep. After osteochondral grafts were performed, the animals were treated with PEMFs for 6 h/day or sham-treated. Six animals were sacrificed at 1 month. Fourteen animals were treated for 2 months and sacrificed at 6 months. At 1 month, the osteogenic activity at the transplant-host subchondral bone interface was increased in PEMF-treated animals compared to controls. Articular cartilage was healthy in controls and stimulated animals. At 6 months, complete resorption was observed in four control grafts only. Cyst-like resorption areas were more frequent within the graft of sham-treated animals versus PEMF-treated. The average volume of the cysts was not significantly different between the two groups; nevertheless, analysis of the variance of the volumes demonstrated a significant difference. The histological score showed no significant differences between controls and stimulated animals, but the percentage of surface covered by fibrous tissue was higher in the control group than in the stimulated one. Interleukin-1 and tumor necrosis factor-α concentration in the synovial fluid was significantly lower, and transforming growth factor-β1 was significantly higher, in PEMF-treated animals compared to controls. One month after osteochondral graft implantation, we observed larger bone formation in PEMF- treated grafts which favors early graft stabilization. In the long term, PEMF exposure limited the bone resorption in subchondral bone; furthermore, the cytokine profile in the synovial fluid was indicative of a more favorable articular environment for the graft.
KW - Cartilage repair
KW - Cytokines
KW - Osteochondral autografts
KW - Pulsed electromagnetic fields
UR - http://www.scopus.com/inward/record.url?scp=43649084016&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=43649084016&partnerID=8YFLogxK
U2 - 10.1002/jor.20530
DO - 10.1002/jor.20530
M3 - Article
C2 - 18176941
AN - SCOPUS:43649084016
VL - 26
SP - 631
EP - 642
JO - Journal of Orthopaedic Research
JF - Journal of Orthopaedic Research
SN - 0736-0266
IS - 5
ER -