This multicenter retrospective cohort study evaluated 131 patients who underwent intercalary allograft reconstruction for lower-extremity bone tumors between 1980 and 2006. With a median 14-year follow-up, it asks whether intercalary allografts truly provide durable long-term reconstruction after early ingrowth — as some prior authors claimed.
Prior studies with short-to-midterm follow-up led some authors to conclude that allografts become durable once early ingrowth succeeds. This study, with the longest follow-up series published to date, shows that conclusion was wrong.
When planning fixation for an intercalary allograft, use a bridging plate construct. Nail-only fixation quintuples nonunion risk, and non-bridging plates nearly triple it — both findings held on multivariable analysis independent of location, bone segment, and reconstruction length.
When counseling young patients before surgery, be explicit: failure risk is lifelong at roughly 1.4% per year, not front-loaded. A 19-year-old with a successfully healed allograft at 5 years still faces meaningful mechanical risk at 15 and 20 years.
For tibial reconstructions specifically, plan soft-tissue coverage proactively. Infection rates are four times higher than femoral, and most failures from infection required allograft removal.
This multicenter retrospective cohort study evaluated 131 patients who underwent intercalary allograft reconstruction for lower-extremity bone tumors between 1980 and 2006. With a median 14-year follow-up, it asks whether intercalary allografts truly provide durable long-term reconstruction after early ingrowth — as some prior authors claimed.
Prior studies with short-to-midterm follow-up led some authors to conclude that allografts become durable once early ingrowth succeeds. This study, with the longest follow-up series published to date, shows that conclusion was wrong.
When planning fixation for an intercalary allograft, use a bridging plate construct. Nail-only fixation quintuples nonunion risk, and non-bridging plates nearly triple it — both findings held on multivariable analysis independent of location, bone segment, and reconstruction length.
When counseling young patients before surgery, be explicit: failure risk is lifelong at roughly 1.4% per year, not front-loaded. A 19-year-old with a successfully healed allograft at 5 years still faces meaningful mechanical risk at 15 and 20 years.
For tibial reconstructions specifically, plan soft-tissue coverage proactively. Infection rates are four times higher than femoral, and most failures from infection required allograft removal.