title: A two-step (altered cast) impression technique in the prosthetic rehabilitation of a patient after a maxillectomy: a clinical report.
abstract: This clinical report describes the prosthetic rehabilitation complicated by trismus (as a consequence of surgery and radiation therapy) of a patient with an acquired maxillary defect, after surgical removal of the right maxillary sinus tumor. The patient was restored with a partial removable dental prosthesis with a hollow bulb obturator to obtain orofacial rehabilitation and defect obturation. Precise obturation requires an accurate impression of the resection defect. A 2-step impression was performed because of trismus. A primary maxillary impression was made with an irreversible hydrocolloid, while a secondary (altered cast) impression was made with a silicone material by using the obturator cast framework as a tray. In that way an altered cast was produced. Subsequently, an obturator prosthesis was processed with a conventional technique.
authors.affiliation: Professor, Department of Prosthodontics at Clinical Hospital, Dubrava, and Department of Fixed Prosthodontics at School of Dental Medicine, University of Zagreb, Croatia.
authors.forename: Denis
authors.initials: D
authors.lastname: Vojvodic
authors.forename: Josip
authors.initials: J
authors.lastname: Kranjcic
mesh_terms: D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000601:surgery; D003102:Colloids / Q000737:chemistry; D016734:Dental Clasps; D003760:Dental Impression Materials / Q000737:chemistry; D003761:Dental Impression Technique; D017267:Dental Prosthesis Design; D003819:Denture Bases; D003779:Denture Design; D003781:Denture Retention; D003832:Denture, Partial, Removable; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008437:Maxilla / Q000601:surgery*; D008444:Maxillary Sinus Neoplasms / Q000601:surgery; D010158:Palatal Obturators; D012828:Silicones / Q000737:chemistry
chemical_list: D003102:Colloids; D003760:Dental Impression Materials; D012828:Silicones; C031243:OV-225