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Fabrication of a 3D Printing Definitive Obturator Prosthesis: a Clinical Report

Theodoros Tasopoulos ; Private practice, Athens, Greece
Georgios Kouveliotis ; National and Kapodistrian University of Athens, Dental School, Department of Prosthodontics, Athens, Greece
Grigoris Polyzois ; National and Kapodistrian University of Athens, Dental School, Department of Prosthodontics, Athens, Greece
Vasiliki Karathanasi ; Private practice, Athens, Greece

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Introduction: Digital technologies related to imaging and manufacturing provide the clinician with a wide variety of treatment options. Stereolithography (SLA) offers a simple and predictable way for an accurate reconstruction of congenital or acquired defects. Clinical case: A 65-years old cancer patient with non- keratinized squamous cell carcinoma of left maxillary sinus came for a prosthetic clinical evaluation. A bilateral maxillectomy was performed and the treatment plan included definite obturator prosthesis for the upper arch. CT data and 3D planning software were used to create a 3D printing plastic model of the defect. A wax pattern of the hollow bulb was fabricated and cured with heatcured silicone soft liner. A final impression was obtained with the hollow bulb placed intraorally. The
master cast was duplicated and the new cast was invested and reflasked. The flasks were opened, wax was boiled out and some space was created in the internal part of the obturator. Transparent
heat cured acrylic resin was sandwiched with, at the inner part of the bulb, improving the retention between the acrylic denture base and the silicone based soft lining material. The patient was then placed on a 6-month recall. The five-year follow up consists of a chair side relining, when needed, of the definite removable prostheses. Conclusion: Maxillofacial surgery patients may develop postoperative
complications such as trismus and pain. In these cases, the combination of digital technology and conventional techniques provide an accurate prosthetic restoration.


Maxillary Sinus Neoplasms; Denture, Complete, Upper; Three-Dimensional Printing; Obturator; Stereolithography

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