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All topics
  1. What it is
  2. Why it matters
  3. Timing
  4. The procedure
  5. Patient journey
  6. Recovery supplies
  7. Implant materials
  8. Side-by-side
  9. US manufacturers
  10. What the evidence says
  11. Value analysis
  12. Questions to ask
  13. Glossary
  14. Resources
  15. References

When

When is cranioplasty done?

There is no single right time. The surgeon waits until brain swelling has resolved, the scalp wound has healed, and there is no sign of infection. Beyond that, timing depends on the patient's overall recovery and on whether problems like the syndrome of the trephined call for repair sooner.

Research has not settled whether earlier or later is better overall. Doing it earlier seems to reduce some problems and increase others.3

Clinical detail

A 2024 meta-analysis in severe TBI found early cranioplasty (within about 35 days) associated with lower odds of subdural effusion (OR 0.37) with no difference in infection. Cranioplasty at or under 3 months was associated with fewer minor complications (OR 0.45) but higher odds of hydrocephalus (OR 3.20) and total complications (OR 1.42). The authors conclude there is no consensus on optimal timing.3

Material choice interacts with timing when the patient's own flap is used: in a series of 960 cryopreserved flaps, storage beyond 365 days was associated with higher resorption (6.88% vs 2.92%).8

Sources for this page

  1. Palavani LB, et al. Timing matters: a comprehensive meta-analysis on the optimal period for cranioplasty after severe TBI. Oper Neurosurg. 2025;29(1):1-18. doi:10.1227/ons.0000000000001404
  2. Fan MC, et al. Cryopreservation of autologous cranial bone flaps for cranioplasty: a large sample retrospective study. World Neurosurg. 2018;109:e853-e859. doi:10.1016/j.wneu.2017.10.112

All references