9 Implantation of Fresh Osteochondral Allografts of the Knee

2006 ◽  
Keyword(s):  
Osteochondral Allografts

Use of Small-Pin Distraction and Low-Speed, High-Torque Burring for Talar Osteochondral Allografts: Technique Tip

2021 ◽  
pp. 107110072110031
Author(s):  
Ryan O’Leary ◽  
Ian M. Foran ◽  
David J. Dalstrom
Keyword(s):  
Expert Opinion ◽  
Level Of Evidence ◽  
Low Speed ◽  
Evidence Level ◽  
High Torque ◽  
Osteochondral Allografts

Level of Evidence: Level V, expert opinion.

Overlapping Allografts Provide Superior and More Reliable Surface Topography Matching Than Oblong Allografts: A Computer-Simulated Model Study

2021 ◽  
pp. 036354652110030
Author(s):  
Hailey P. Huddleston ◽  
Atsushi Urita ◽  
William M. Cregar ◽  
Theodore M. Wolfson ◽  
Brian J. Cole ◽  
...  
Keyword(s):  
Articular Cartilage ◽  
Surface Topography ◽  
Osteochondral Allograft ◽  
Cartilage Defects ◽  
Radius Of Curvature ◽  
Cartilage Surface ◽  
3 Dimensional ◽  
Cloud Models ◽  
And Cartilage ◽  
Osteochondral Allografts

Background: Osteochondral allograft transplantation is 1 treatment option for focal articular cartilage defects of the knee. Large irregular defects, which can be treated using an oblong allograft or multiple overlapping allografts, increase the procedure’s technical complexity and may provide suboptimal cartilage and subchondral surface matching between donor grafts and recipient sites. Purpose: To quantify and compare cartilage and subchondral surface topography mismatch and cartilage step-off for oblong and overlapping allografts using a 3-dimensional simulation model. Study Design: Controlled laboratory study. Methods: Human cadaveric medial femoral hemicondyles (n = 12) underwent computed tomography and were segmented into cartilage and bone components using 3-dimensional reconstruction and modeling software. Segments were then exported into point-cloud models. Modeled defect sizes of 17 × 30 mm were created on each recipient hemicondyle. There were 2 types of donor allografts from each condyle utilized: overlapping and oblong. Grafts were virtually harvested and implanted to optimally align with the defect to provide minimal cartilage surface topography mismatch. Least mean squares distances were used to measure cartilage and subchondral surface topography mismatch and cartilage step-off. Results: Cartilage and subchondral topography mismatch for the overlapping allograft group was 0.27 ± 0.02 mm and 0.80 ± 0.19 mm, respectively. In comparison, the oblong allograft group had significantly increased cartilage (0.62 ± 0.43 mm; P < .001) and subchondral (1.49 ± 1.10 mm; P < .001) mismatch. Cartilage step-off was also found to be significantly increased in the oblong group compared with the overlapping group ( P < .001). In addition, overlapping allografts more reliably provided a significantly higher percentage of clinically acceptable (0.5- and 1-mm thresholds) cartilage surface topography matching (overlapping: 100% for both 0.5 and 1 mm; oblong: 90% for 1 mm and 56% for 0.5 mm; P < .001) and cartilage step-off (overlapping: 100% for both 0.5 and 1 mm; oblong: 86% for 1 mm and 12% for 0.5 mm; P < .001). Conclusion: This computer simulation study demonstrated improved topography matching and decreased cartilage step-off with overlapping osteochondral allografts compared with oblong osteochondral allografts when using grafts from donors that were not matched to the recipient condyle by size or radius of curvature. These findings suggest that overlapping allografts may be superior in treating large, irregular osteochondral defects involving the femoral condyles with regard to technique. Clinical Relevance: This study suggests that overlapping allografts may provide superior articular cartilage surface topography matching compared with oblong allografts and do so in a more reliable fashion. Surgeons may consider overlapping allografts over oblong allografts because of the increased ease of topography matching during placement.

scholarly journals In vivo efficacy of fresh versus frozen osteochondral allografts in the goat at 6 months is associated with PRG4 secretion

2013 ◽  
Vol 31 (6) ◽  
pp. 880-886 ◽  
Author(s):  
Andrea L. Pallante-Kichura ◽  
Albert C. Chen ◽  
Michele M. Temple-Wong ◽  
William D. Bugbee ◽  
Robert L. Sah
Keyword(s):  
In Vivo Efficacy ◽  
Osteochondral Allografts

The Effects of Storage on Fresh Human Osteochondral Allografts

2004 ◽  
Vol 418 ◽  
pp. 246-252 ◽  
Author(s):  
Scott T Ball ◽  
David Amiel ◽  
Seth K Williams ◽  
William Tontz ◽  
Albert C Chen ◽  
...  
Keyword(s):  
Osteochondral Allografts

Prolonged Storage of Osteochondral Allografts -Does the Addition of Fetal Bovine Serum Improve Chondrocyte Viability?

2010 ◽  
Vol 19 (04) ◽  
pp. 265-272 ◽  
Author(s):  
Andrew Pennock ◽  
Ferdinand Wagner ◽  
Catherine Robertson ◽  
Frederick Harwood ◽  
William Bugbee ◽  
...  
Keyword(s):  
Bovine Serum ◽  
Fetal Bovine Serum ◽  
Prolonged Storage ◽  
Chondrocyte Viability ◽  
Fetal Bovine ◽  
Osteochondral Allografts

The Development of a Size and Shape Matching Index for Osteochondral Allografts

Limb Salvage ◽  
1991 ◽  
pp. 25-31 ◽  
Author(s):  
M. L. Samson ◽  
K.-N. An ◽  
M. G. Rock ◽  
R. A. Robb ◽  
E. Y. S. Chao
Keyword(s):  
Shape Matching ◽  
Size And Shape ◽  
Matching Index ◽  
Osteochondral Allografts

Morphological Investigations of Osteochondral Allografts

Limb Salvage ◽  
1991 ◽  
pp. 9-15 ◽  
Author(s):  
C. Delloye ◽  
C. Savineau-Lalanne ◽  
P. De Nayer ◽  
M. F. Harmand
Keyword(s):  
Morphological Investigations ◽  
Osteochondral Allografts
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