alternative graft sources allograft quadriceps tendon john f. meyers m.d
TRANSCRIPT
Alternative graft sourcesAllograft
Quadriceps tendon
John F. Meyers M.D.
Allograft advantages
• No donor morbidity
• Readily available
• Can use any size
• Shorter operative time
• Better cosmesis
Allograft disadvantages
• Slower incorporation
• ? Ultimate strength
• Disease transmission
• Cost
Basic ScienceArnoczky-canine
• Avascular necrosis followed by revascularization and cellular proliferation
• At one year the gross and histologic appearance of the allograft resembled that of a normal ACL
Basic ScienceJackson- goat
• At 6 months allografts had smaller cross sectional area and persistence of large diameter collagen fibers.
• Autografts were stronger than allografts at the 6 month period
• Force to failure 2 times greater in autograft.
Basic ScienceShino- canine
• Vascular pattern of allograft similar to ACL at 52 weeks.
• Mean energy to failure 57% of control at 52 weeks
Basic ScienceFisher- humans
• Tunnel widening with achilles tendon allografts
• Clinical results excellent
ClinicalIndelicato
• Fresh-frozen slightly better than freeze-dried.
• Clinical results good.
• No autograft controls.
ClinicalShino
• Good results at average 5 year followup.
• No autograft controls.
ClinicalNoyes
• No difference between BTB and fascia lata allografts.
ClinicalCollette
• Compared BTB autogtaft and allograft.
• Results similar.
ClinicalHarner
• Compared autograft and allograft.
• Evaluated by objective and subjective data
• No statistically significant difference in any area.
Disease TransmissionHIV and Hepatitis
• 1:1.6 million chance of disease transmission using AATB screening and antibody testing.
• Now using antibody, antigen and recumbent DNA testing.
There has never been a case of disease transmission
using freeze-dried tissue !
VIDEO
Quadriceps tendon- advantages
• Larger and stronger graft possible.
• Can be harvested by assistant while surgeon doing notchplasty.
• Not an allograft!
Quadriceps tendon- disadvantages
• Postoperative quadriceps weakness.
• No track record to date.
Basic ScienceStaubli
• Patellar ligamen stiffer than Quadriceps tendon.
Basic ScienceHarris
• Load to failure 1.36 times Patellar tendon
ClinicalBlouth
• Described use of quad tendon for ACL reconstruction in 1984
ClinicalFulkerson
• 130 Quad tendon reconstructions with only four failures since 1994.
VideoFulkerson Technique