The area of the meniscus that ‘doesn’t have a good blood supply, typically the central and middle third of the meniscus, can, in fact, heal. These zones are just harder to repair with traditional techniques. And the central third can be removed as it has not been shown to be critical to the knee’s long-term health. So what’s really important is to have any tears that occur in the middle or peripheral third repaired (assuming the knee is not already arthritic, in which case the options are conservative treatment or knee replacement surgery). Below are papers demonstrating that the avascular zone can, in fact, heal, and these papers were published even before the Circumferential Stitch for meniscus repair enabled improved mechanical repairs.
References:
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1. Avascular Zone Meniscal Repair in ACL patients, 79% completely healed.Ahn, J.H., et al., Clinical and second-look arthroscopic evaluation of repaired medial meniscus in anterior cruciate ligament-reconstructed knees. Am J Sports Med, 2010. 38(3): p. 472-7.2. Avascular Zone Isolated Meniscal Tears, horizontal sutures, 60% completely healed.Eggli, S., et al., Long-term results of arthroscopic meniscal repair. An analysis of isolated tears. Am J Sports Med, 1995. 23(6): p. 715-20.3. Avascular Zone, including radial tears, patients over 40 yrs, 87% success rate.Noyes, F.R. and S.D. Barber-Westin, Arthroscopic repair of meniscus tears extending into the avascular zone with or without anterior cruciate ligament reconstruction in patients 40 years of age and older. Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association, 2000. 16(8): p. 822-829.4. Avascular Zone, vertical sutures, under 20yrs, 62% success rate.Noyes, F.R., et al., Greater Than 10-Year Results of Red-White Longitudinal Meniscus Repairs in Patients 20 Years of Age or Younger. The American Journal of Sports Medicine, 2011.5. Avascular Zone, vertical sutures in ACL patients, 54% success rate.Asahina, S., et al., Intermediate-Term Results of Meniscal Repair in Anterior Cruciate Ligament-Reconstructed Knees. The American Journal of Sports Medicine, 1998. 26(5): p. 688-691.6. Avascular Zone, vertical sutures, 94% success rate.Barber, F.A., D.H. Johnson, and J.L. Halbrecht, Arthroscopic Meniscal Repair Using the BioStinger. Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association, 2005. 21(6): p. 744-750.7. Avascular Zone, vertical sutures, 100% success, arrow fixator, 80%.Steenbrugge, F., et al., Arthroscopic meniscus repair: inside-out technique vs. Biofix meniscus arrow. Knee Surgery, Sports Traumatology, Arthroscopy, 2004. 12(1): p. 43-49.8. Avascular Zone, vertical sutures, 79% success.Buseck, M.S. and F.R. Noyes, Arthroscopic evaluation of meniscal repairs after anterior cruciate ligament reconstruction and immediate motion. The American Journal of Sports Medicine, 1991. 19(5): p. 489-494.9. Avascular Zone, vertical sutures, radial tears 73% success, flap tears 78% success. Rubman, M.H., F.R. Noyes, and S.D. Barber-Westin, Arthroscopic Repair of Meniscal Tears that Extend into the Avascular Zone. The American Journal of Sports Medicine, 1998. 26(1): p. 87-95.10. Avascular Zone, All inside circumferential suture, 100% success.Yoo, J.C., et al., Suturing complete radial tears of the lateral meniscus. Arthroscopy, 2007. 23(11): p. 1249 e1-7.11. Avascular Zone, all inside devices, isolated meniscal tears, 68% success.Gallacher, P.D., et al., White on white meniscal tears to fix or not to fix? The Knee, 2010. 17(4): p. 270-273.12. Avascular Zone, vertical sutures, bucket handle tears with ACL. 91% success. Feng, H., et al., Second-Look Arthroscopic Evaluation of Bucket-Handle Meniscus Tear Repairs With Anterior Cruciate Ligament Reconstruction: 67 Consecutive Cases. Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association, 2008. 24(12): p. 1358-1366.
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