Denture Stability: It's the resistance of the denture against Any-Direction movement.
Denture Retention: It's the resistance of the denture against movement away from the tissues.
Denture Support: It's the resistance of the denture against movement toward the tissue.
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Denture Support:
- Periodontal Ligament around the natural teeth should be 2.5 times more than the complete denture bearing area on the mucosa.
- To achieve the best support for the denture, try to make a maximum area as much as possible.
- The Primary Support Areas are:
A- Mandible: Buccal Shelf of bone and Retromolar Pad.
B- Maxilla: Horizontal Portion of the hard palate.
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Denture Retention:
- The Primary Retention methods are:
A- Border Sealing of the Denture.
B- Neuromascular Control.
C- Physical (Adhesive) forces: Salive-Denture base and Saliva-Mucosa.
- The Criteria of the great retentive force are:
A- The Salive film covers the whole surface area of the denture.
B- The Denture Base extends the full length in the sulcus.
C- Border Seal prevent the ingress of the saliva and air.
- Elements of the great retentive force are:
A- Total Surface area. (More surface area=More retention)
B- Viscosity of the saliva. (More Saliva Viscosity=More retention)
C- Distance between the denture base and the mucosa. (More Distance=Less retention)
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Denture Stability:
- Factors affecting the Denture Stability:
A- Denture Base Adaptation.
B- Ridge Anatomy.
C- NeuroMascular Control.
D- Occlusal Harmony.
- Ridge Anatomy effect the Denture Stability By:
A- Large, Square and Broad Ridges.
B- Steep Palatal Vault.
C- Firm Vs. Flabby Ridges.
- NreuroMascular Control effect the Denture Stability By making the denture borders to be polished to allow the tongue, cheek and lips to seat the denture during function.
- Occlusal Harmony effect the Denture Stability By:
A- Bilateral, simultaneous posterior tooth contacts in retruded jaw relationship.
B- Free of the Occlusal interferences.
C- Acceptable level of the mandibular occlusal plane.
D- Teeth set close to the natural teeth position.
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This Article has been Authored By :: World Of Dentistry :: TEAM
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Yours,
:: World Of Dentistry :: TEAM
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