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Fabrication of a Co-Cr Precision Attachment in Association with a Zigomatic Implant Prepared and presented by Ruan S. de Jongh BTech: Dental Technology.

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Presentation on theme: "Fabrication of a Co-Cr Precision Attachment in Association with a Zigomatic Implant Prepared and presented by Ruan S. de Jongh BTech: Dental Technology."— Presentation transcript:

1 Fabrication of a Co-Cr Precision Attachment in Association with a Zigomatic Implant Prepared and presented by Ruan S. de Jongh BTech: Dental Technology Student at Peninsula Technikon

2 Contents Patient history Background information Possible treatment plan Possible technical treatment plan Most suitable treatment option Treatment option of choice Laboratory procedures and final placement

3 Patient History 29 year old female 1974 – complained about swelling Tumour in right maxilla (Myxoma) Myxoma appeared 1 year earlier 2002 – Hemimaxillectomy From midline including 2.2 —1.8 Obturator made in 2002 by Ms Galloway 4 th year student in 2002 Started with this current case

4 Condition and background information Currently tumor is removed Patient’s maxillary right Tumour was benign Wearing obturator Patient in stable and ready for advancements.

5 Possible Treatment Plan Hollow-bulb obturator Already in existence Co-Cr precision attachment Osteotomy

6 Possible Technical Treatment Plan Cobalt chrome removable denture Surgery (R = 3h) Anaesthetics = R ph Specialist = R ph Zigomatic implant ± R 8000 Fabrication of attachment bar ± R Fabrication of Co-Cr appliance ± R Total cost adding up to ± R16 500

7 Possible Technical Treatment Plan (continued) Private hospital Ward fee = R 500 p/day Total cost = R 205 Surgery = R 165 Ward fee = R 40 (1 month) I.D.S. pays for implant

8 Possible Technical Treatment Plan (continued) First visit Impression Surgery – placement of zigomatic implant Healing time (± 6 weeks) Second visit Impression with analog in place Construction of attachment bar

9 Possible Technical Treatment Plan (continued) Third visit Impression with attachment bar Co-Cr appliance is constructed Fourth visit Co-Cr appliance is placed With 1 st try-in Fifth visit Final placement of Co-Cr removable denture

10 Most Suitable Option Co-Cr precision attachment Implant support Improved stability compared to an obturator Patient is ideal candidate age benign tumour have retentive teeth

11 Treatment Option of Choice Cobalt-Chrome precision attachment Advantages Good aesthetics Very stable Reasonable cost Hygienic Superior strength 1 Disadvantages Movement during function Retention diminishes with use Fracture - porosity 1

12 Laboratory Procedures First Visit Cast of primary model Changes are notified 2

13 Laboratory Procedures (continued) Second Visit Final model cast with analogs Construction of Attachment Bar 2 Cast in Co-Cr Worked off and polished

14 Laboratory Procedures (continued) Second visit (continued) Plastic clips preferred (nylon)

15 Laboratory Procedures (continued) Third Visit Construction of Co-Cr Precision Attachment 1 Duplicated Co-Cr appliance constructed in wax Invested Cast Sprues removed Sandblasted Trimmed Polished

16 Laboratory Procedures (continued) Fourth Visit Placement of Co-Cr precision Attachment 1 st try-in OR Final placement

17 References 1.G. Jenkins, Precision attachments. Removable Partial Prostodontics, Ch 6, Moscow:Quintessence Publishing, 1999: University of Pennsylvania Health System. Advances in Head and Neck Reconstruction. 2002: D. Henderson, Major and Minor Connectors, 6 th Ed. Removable Partial Dentures, Ch 4, Mosby Company, London. 1981: 20-39

18 Thank You! Special thanks to: Prof J.Morkel Dr P.van Zyl Ms Z.Nortje


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