Resorbable Construct for Subtotal Cranial Vault Remodeling.

Pansynostosis can lead to significantly thin calvarial bone, limiting the availability of high-quality allograft material for cranial vault expansion. This condition often results in large cranial defects and poorly stabilized surgical constructs. Prior research has shown that neonatal dura and paracranium possess osteoinductive properties, suggesting a potential for reconstructing extensive calvarial defects using minimal native bone. However, no prior work had resolved how to apply these properties effectively in subtotal cranial vault remodeling. That uncertainty drove the exploration of alternative scaffolding materials. This gap motivated the development of resorbable constructs as a solution. The need for a scaffold that supports osteogenesis while being biocompatible remained unmet. No prior work had resolved the optimal use of resorbable materials in such cases. This gap motivated the current approach.

The aim of this case report is to describe the use of a custom resorbable construct for cranial vault remodeling in a patient with Cruzon syndrome and pansynostosis. The specific problem addressed is the challenge of reconstructing large cranial defects when native bone is insufficient. The motivation stems from the limitations of traditional grafting techniques in such cases. The researchers propose that resorbable materials could provide structural support while promoting osteogenesis. The study focuses on whether such a construct can maintain cranial shape and support bone growth. The authors suggest that this approach could reduce the need for extensive native bone grafting. The goal is to demonstrate the feasibility of this method in infantile cranial reconstruction. The study evaluates the construct's performance in terms of resorption and integration.

The study involved a 4-month-old male infant with Cruzon syndrome and pansynostosis. A staged cranial vault reconstruction was performed, beginning with the posterior and middle regions. The native calvarial bone was too thin and fragmented to provide structural integrity. Resorbable poly DL lactic acid (Sonic Weld) plates were used to create a custom construct. The construct was seeded with usable fragments of native calvarium. Resorbable pins were used to secure the construct to the cranial base. Postoperative imaging was used to monitor cranial shape and osteogenesis. The construct was evaluated for resorption and integration during a follow-up anterior cranial vault procedure.

The resorbable construct maintained cranial shape throughout the postoperative period. Computed tomography imaging showed osteogenesis within the construct and bridging of the fragmented grafts. At 11 months postoperatively, the patient demonstrated appropriate cranial expansion. The posterior cranial shape remained stable. The construct showed near-complete resorption during the anterior remodeling procedure. Minimal dural adhesions were observed. The resorbable plates provided structural support while allowing bone growth. The use of minimal native bone grafts was sufficient for reconstruction.

The authors suggest that fully resorbable constructs can provide structural support and a scaffold for osteogenesis in cranial vault remodeling. This approach may be effective in cases where native bone is insufficient. The study demonstrates the potential of resorbable materials in infantile cranial reconstruction. The construct allowed for cranial shape maintenance and bone growth. The findings suggest that minimal native bone grafts can be used in conjunction with resorbable scaffolds. The resorption of the construct was observed without compromising stability. The authors propose that this method could be a viable alternative to traditional grafting techniques. The study supports the use of resorbable constructs in subtotal cranial vault remodeling.