Related Experiment Video
Updated: Sep 17, 2025
Controlled Cortical Impact Model for Traumatic Brain Injury
Published on: August 5, 2014
Stability of cranial defect size following decompressive craniectomy for traumatic brain injury in the pediatric
Changlong Bi1, Haiyu Wu1, Jiacheng Liu1
1Department of Neurosurgery, Xiangya Hospital, Central South University, No. 87 Xiangya Rd, Changsha, 410008, Hunan, China.
Insights
Pediatric cranial defects after decompressive craniectomy for traumatic brain injury remain stable in size with age. This study also established an intact skull growth curve for reference in pediatric cranioplasty.
Area of Science:
- Pediatric neurosurgery
- Craniofacial reconstruction
- Pediatric neurotrauma
Background:
- Cranial defects are common after decompressive craniectomy (DC) for pediatric traumatic brain injury (TBI).
- The long-term growth dynamics of these cranial defects are not well understood.
- Understanding defect stability is crucial for pediatric cranioplasty (CP).
Purpose of the Study:
- To evaluate cranial defect size and its age-related changes in pediatric patients post-DC for TBI.
- To compare defect stability across different implant materials.
- To establish an intact skull growth curve for pediatric patients.
Main Methods:
- Retrospective analysis of pediatric patients undergoing DC for TBI and subsequent CP.
- Measurement of cranial defect dimensions (circumference, area, volume) at DC, CP, and follow-up.
- Development of an intact skull growth curve using a control group (n=208, age < 22).
Main Results:
- Cranial defect size (circumference, area, volume) showed no statistically significant changes with age (p > 0.05).
- No significant differences in defect morphology were observed based on implant material (autologous bone, titanium, PEEK).
- The defective skull bone showed significant growth, and an intact skull growth curve revealed distinct growth phases with stabilization after age 17.
Conclusions:
- Pediatric cranial defect size remains stable over time following decompressive craniectomy for traumatic brain injury.
- Implant material does not significantly affect cranial defect morphology or stability.
- The established intact skull growth curve provides valuable reference data for pediatric cranioplasty decisions.
Abstract:
Cranial defects are common sequelae of decompressive craniectomy (DC) for traumatic brain injury (TBI) in pediatric patients, and their long-term growth dynamics remain poorly understood. This study aims to evaluate cranial defect size and its pattern of change with age following DC for TBI in the pediatric population. This single-center retrospective study included pediatric patients who underwent DC for TBI and later returned for cranioplasty (CP). Cranial defect size was evaluated at three time points-DC, CP, and follow-up-using multiple morphological measurements, including circumference, sectional area, and volume. Additionally, a control group of 208 individuals under 22 years of age was used to establish an intact skull growth curve. Cranial defect measurements, assessed through circumference, sectional area, and volume at three time points, showed no statistically significant changes (p = 0.54, 0.19, and 0.59), indicating stability with age. Subgroup analysis by implant material (autologous bone, titanium, and PEEK) also revealed no significant differences in defect morphology. The defective skull, defined as the cranial bones excluding the defect area, exhibited significant growth over time. Additionally, the intact skull growth curve, derived from the control group, exhibited a segmented pattern with three distinct growth phases: rapid growth during the first 5 years, followed by slower growth in the next 5 years, and a period of accelerated growth from age 11 onwards, with stabilization of skull volume at approximately 430 cm³ after age 17. This study provides novel insights into the stability of cranial defect size following DC for TBI in the pediatric population. The results suggest that, despite ongoing skull growth, cranial defect size remains stable with age, regardless of implant material. Furthermore, the study contributes a growth curve for the intact skull, offering valuable reference data for clinical decision-making in pediatric cranioplasty.
