Skull surgery bone cement DirectInject

for maxillofacial surgery

Overview
A self‑setting, hydroxyapatite (calcium phosphate) cranial cement for repair of neurosurgical burr holes, contiguous craniotomy cuts and other cranial defects that are not intrinsic to bony structural stability. Also indicated for augmentation or restoration of craniofacial bony contour, including cranial and zygomatic bones. Intended for repair of cranial defects with a surface area of 4 cm² or less in skeletally mature patients; suitable for surgically created bone defects.

Key positioning
The first on‑demand HA cement providing ready‑to‑implant delivery through a mixer‑cannula system to simplify cranial closure workflows.

Features and benefits

• Ready for implantation immediately upon request — no manual mixing required.
• Included mixer‑cannula enables controlled, on‑demand delivery at the surgical site.
• Second mixer‑cannula option allows staged or dual‑interval implantation.
• Consistent viscosity during delivery with negligible displacement of surrounding cement or tissue.

Indications / Intended use

• Repair of neurosurgical burr holes.
• Repair of contiguous craniotomy cuts and other cranial defects not affecting bony stability.
• Augmentation or restoration of craniofacial bony contour (cranial and zygomatic bones).
• Repair of cranial defects with surface area of 4 cm² or less.
• For patients with completed skeletal growth; intended for surgically created bone defects.

Technical specifications

• Product name: DirectInject (On‑Demand HA Cement).
• Manufacturer / Brand: Stryker.
• Material: Calcium phosphate (hydroxyapatite‑based cement).
• Formulation: Self‑setting cement delivered via mixer‑cannula system.
• Delivery: No manual mixing required; includes mixer‑cannula; additional mixer‑cannula available for dual‑interval implantation.
• Intended defect size: Surface area 4 cm² or less.
• Indicated patient population: Skeletally mature patients.
• Clinical uses: Neurosurgical burr holes, craniotomy cuts, cranial and zygomatic contour augmentation.
• Advantages: Ready‑to‑implant on demand; consistent viscosity with minimal displacement.
• Regulatory / publication note: Last updated March 2021 (page metadata).