Related Experiment Video
Updated: May 19, 2026

07:16
Finite Element Analysis Model for Assessing Expansion Patterns from Surgically Assisted Rapid Palatal Expansion
Published on: October 20, 2023
Spring-assisted posterior skull expansion without osteotomies.
Eric Arnaud1, Alexandre Marchac, Yassine Jeblaoui
1Craniofacial Unit, Department of Pediatric Neurosurgery, Hôpital Necker-Enfants Malades, 34, avenue d'Eylau, 75116, Paris, France. drericarnaud@hotmail.com
Summary
Early posterior skull remodeling using translambdoid springs effectively increases posterior skull volume in infants with brachycephaly. This minimally invasive technique reduces the risk of developing difficult-to-correct turricephaly.
Area of Science:
- Pediatric Neurosurgery
- Craniofacial Surgery
- Infant Skull Development
Background:
- Brachycephaly in infants can lead to posterior skull flatness, increasing the risk of developing turricephaly.
- Turricephaly is a challenging skull deformity to correct in infants.
- Early intervention for posterior skull deformation is crucial to prevent severe outcomes.
Purpose of the Study:
- To evaluate the efficacy of early posterior skull remodeling using translambdoid springs.
- To assess the ability of springs to create distraction across patent lambdoid sutures.
- To determine if this method can increase posterior skull volume and reduce the need for later, more extensive surgery.
Main Methods:
- Posterior scalp elevation in infants under 6 months with brachycephaly.
- Placement of U-shaped stainless steel translambdoid springs across patent lambdoid sutures.
- Utilizing subperiosteal elevators and bony rongeurs for spring placement without drilling.
- Maintaining a prone position post-operatively to facilitate skull remodeling.
Main Results:
- Spring insertion achieved immediate distraction across the lambdoid sutures.
- Successful posterior skull remodeling was observed in 19 treated cases.
- The procedure demonstrated minimal morbidity.
Conclusions:
- Spring-assisted expansion across patent sutures is effective in infants under 6 months.
- This technique allows for safe and effective posterior skull remodeling.
- It provides a viable option to delay or avoid more radical anterior surgery.

