The Fabrication of a Hollow Bulb Obturator for a Patient with a Hemi-Maxillectomy Defect By Sanchia Kemp In partial fulfillment of BTech: Dental Technology Contents History Condition and Background Possible Clinical Treatment Options Possible Technical Treatment Options Treatment Option of Choice Laboratory Procedures Problem Areas History 1 st Diagnosis 1987 Age 14 Tumor removed 2 nd Diagnosis October 2001 Age 28 Pain and discomfort Condition and Background Osteosarcoma Young adults, children Reoccur 90% 1 Surgically removed Hemi-maxillectomy Intermediate obturator Possible Clinical Treatment Options Free-fibula graft Bone transplant 2 (osteotomy) Zygomatic implants Possible Technical Treatment Options Hollow bulbR800 Metal frameworkR1200 Zygomatic implantsR1000/hr Treatment Options Most suitable option Hollow bulb with metal framework Option of choice Acrylic hollow bulb Laboratory Procedures Primary impression Lab putty Special tray Final impression Laboratory Procedures Plaster and pumice mixture Acrylic cover plate 3 Clasps and base plate Laboratory Procedures Articulated Set-up and wax- up Try-in Laboratory Procedures Plaster base Slots 4 Stone matrix Laboratory Procedures Even layer self cure acrylic resin Laboratory Procedures Ready for final placement Trimmed and polished Problem Areas Model destroyed No desirable flask Peripheral seal Adjustments Problem Areas Wax on inside Layer self-cure acrylic resin Trimmed and polished Before After References 1) Fauci, A.S.& Longo, D.L. Harrisons principles of internal medicine, 15 th ed. USA: McGraw-Hill. 2001: ) Holland, F.H.& Frei, E. Cancer medicine, 5 th ed. Canada: B.C. Decker Inc. 2000: ) Minsley, G.E. An alternative method for fabrication of a closed hollow obturator. JPD. 1986; 55: ) Palmer, B.& Coffey, K.W. Fabrication of the hollow bulb obturator. JPD. 1985; 53: Acknowledgements 1. Dr van Zyl 2. Ms Nortj 3. Mr Mazema 4. Mrs Wright