title: Acrylic cranioplasty with alginate molding: technical note.
abstract: OBJECTIVE
  Acrylic cranioplasty for cranial defects is a common neurosurgical procedure that is performed when the original bone flap becomes infected or is unusable for other reasons. We developed a simple technique to produce a complete copy of the original bone flap from acrylic, using alginate impression material as a mold.
  
  
  METHODS
  Alginate impression material was used to form a mold of the patient's original bone flap. Methylmethacrylate was then placed inside the mold to create an exact duplicate of the bone flap. The acrylic flap was sterilized with gamma irradiation and used for cranioplasty. Two patients who had cranial defects secondary to infections of their craniotomy bone flaps underwent cranioplasty with this technique.
  
  
  CONCLUSIONS
  A perfect copy of the patient's original bone flap was easily and quickly created with this technique, and excellent cosmetic results were obtained. Operative time was shortened because the prosthesis was preformed before the operation. This technique can also be used to mold large or complex cranial defects as long as the original bone flap is available and there is no major cranial remodeling around the defect.
authors.affiliation: Department of Neurological Surgery, Mayo Clinic, Rochester, Minnesota, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Yamamoto
authors.forename: E
authors.initials: E
authors.lastname: Mendel
authors.forename: C
authors.initials: C
authors.lastname: Raffel
mesh_terms: D000464:Alginates; D003399:Craniotomy / Q000379:methods*; D003760:Dental Impression Materials; D006801:Humans; D020366:Methylmethacrylate; D008768:Methylmethacrylates; D019736:Prostheses and Implants; D012086:Reoperation; D013242:Sterilization
chemical_list: D000464:Alginates; D003760:Dental Impression Materials; D008768:Methylmethacrylates; D020366:Methylmethacrylate