The Fabrication of an Implant-Retained Mandibular Overdenture

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The Fabrication of an Implant-Retained
Mandibular Overdenture

• By
• Mian Bëhm
• In partial fulfilment of
• BTech Dental Technology

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Contents

• Condition and Background Information
• Possible Clinical Treatment Options
• Possible Technical Treatment Options
• Most Suitable Treatment Option
• Treatment of Choice
• Laboratory Procedures

• References
• Acknowledgements

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Condition and Background Information

• Motor vehicle accident
• Severe back and neck injuries
• Class 1 Compound fracture of mandible1

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Condition and Background InformationContinue

• Functional problems in left condyle
• No lip seal
• Impaired speech
• Loss of aesthetics

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Possible Clinical Treatment Options

• 1st Treatment
• Removal of mandible
• Osteotomy3

• 2nd Treatment
• Creating a new sulcus
• Placing multiple implants

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Possible Technical Treatment Options

• Conventional partial denture
• Implant-supported overdenture
• Implant-supported ceramic restoration

• Partial denture
• R 400.00
• Excl. Surgery
• Special trays
• Record blocks

Overdenture R 2000.00 Excl. Surgery
Implants Special trays Record blocks
Ceramic restoration R 4300.00 Excl.
Surgery Implants Special trays Record blocks
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Most Suitable Treatment Option

• Implant-supported ceramic restoration

• Advantages
• Life-like aesthetics
• Durable

Disadvantages Expensive Technically
challenging Little supporting structure
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Treatment of Choice
Implant-supported overdenture

• Advantages
• Less expensive
• Good aesthetics
• Restore facial profile
• Removable

• Disadvantage
• Tissue wear

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Laboratory Procedures

1. Impression and model

1. Set-up, wax-up and duplicate

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Laboratory Procedures

1. Surgical stent

1. Implants

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Laboratory Procedures

1. 2nd Impression and model with analogs2

1. Wax-up with guide pins

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Laboratory Procedures

1. Wax is precision milled

• Retentive balls are placed

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Laboratory Procedures

1. Framework is cast and polished

• Overdenture placed

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References

• Harold, W. Overdentures Made Easy, 3rd ed.
  London Quintessence Publishing Co Ltd. 1996 105
  13.
• Southern Implants, Laboratory Procedures Manual,
  January 2003.
• Whaley, K. Muirs Textbook of Pathology, 15th ed.
  2001 680. 

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Acknowledgements

• Prof. Morkel
• Mr Mazema
• Ms Nortjé
• Mrs Wright