- general discussion of allograft tissue:
- as pointed out by Harner et al. (1996), subjective knee scores were slightly better for knees having ACL - bone patellar bone allograft (as compared to BPB autograft patients)
- objective ratings included normal (or nearly normal) results in 48% of allograft patients vs. 38% of autograft patients;
- in contrast, the study by Stringham et al (1996), several interesting findings were noted:
- Lysholm scores greater than 90 were found in 69% of autograft patients vs 67% of allograft patients;
- side to side laxitiy measurements of less than 3 mm were found in 80% of autograft patients vs 70% allograft patients;
- patellofemoral symptoms were slightly more common in allograft patients than in autograft patients;
- 4 out of 31 allograft patients sustained traumatic ruptures within one year of surgery;
- Comparison of anterior cruciate ligament reconstructions using patellar tendon autograft or allograft
- Allograft versus autograft anterior cruciate ligament reconstruction: 3- to 5-year outcome.
- tibial tunnel syndrome:
- postoperative widening of the tibial tunnel of more than 2.8 mm may occur in 46% of patients who receive an allograft;
- consider tying the graft over a tibial post;
- graft rejection:
- note that fresh frozen and freeze dried allografts do not seem to cause graft rejection;
- allograft ruptures:
- may occur as a result of using allografts from older donors (age older than 30-35 is a risk factor)
Use of allografts after failed treatment of rupture of the anterior cruciate ligament [see comments].
The biomechanics of anterior cruciate ligament rehabilitation and reconstruction.
Intraarticular reaction associated with the use of freeze-dried, ethylene oxide-sterilized bone-patella tendon-bone allografts in the reconstruction of the anterior cruciate ligament.