What is secondary stress bearing area?
Primary stress bearing areas of maxilla are crest of alveolar ridge and the horizontal plate of palatine bone and in the mandible; it is the buccal shelf area. Secondary stress bearing areas of the maxillary foundation are rugae area and the slopes of the ridge in the mandibular foundation.
What provides secondary support to a denture?
Incisive papilla Canine eminence Maxilla-Anatomic Landmarks Canine eminance – This prominent bone provides denture support . A square arch prevents a denture from rotating and is thus the best for denture stability .
What is the most stable area for support of a mandibular complete denture?
The lingual flange of the mandibular denture should be turned into the anteroinferior part to produce maximum stability for the denture since no muscle lies directly underneath.
What are the denture bearing areas?
Those surfaces of the teeth and edentulous ridges covered by a denture.
What are the relief areas of mandible?
Relief area:
- Mental Foramen: It is located on the external surface of the mandible between the 1st and 2nd premolar area.
- Genial tubercle: These are a pair of bony tubercles found anteriorly on the lingual side of.
- Torus Mandibularis: It is an abnormal bony prominence found.
What is relief area in prosthodontics?
A relief area is an area on a plaster model defined to relieve pressure on the tissues underneath a denture base; a space is created using a tin foil spacer adapted to the model surface and removed after processing.
Is maxillary tuberosity a stress bearing area?
stress-bearing areas: 1- hard palate 2- lateral slopes of residual alveolar ridge. Secondary stress-bearing areas: 1-Rugae 2-Maxillary tuberosity.
Are lower dentures hard to wear?
Wearing a lower denture is more difficult. Most complaints about wearing dentures have to do with lower dentures. This is because lower dentures are in a mobile environment – where the lips, cheeks and tongue try to dislodge the denture during eating or speaking.
What are the supporting structures of mandible?
It contains loose connective tissue with an aggregation of mucous glands and is bounded posteriorly by the temporalis tendon, laterally by the buccinators and medially by the pterygomandibular raphe and the superior constrictor muscle. The retromolar pad is quite important for the support and the peripheral seal.
How is Masseteric notch formed?
It is due to the contraction of the masseter that a depression is formed at the distobuccal corner of the retromolar area. When the mouth is opened widely the borders in this area cut into the tissue, so it should be recorded with the mouth slightly opened.
What is relief area?
What is the primary stress bearing area in the mandibular arch?
This region is a primary stress bearing area in the mandibular arch . Buccal shelf The buccal shelf is a prime support area because it is parallel to the occlusal plane and the bone is very dense.
Why is the midline palatal suture the primary support area?
For this reason it is a primary support area for the maxillary denture. The configuration of a high palate is not conducive to the stability and support of a denture due to the inclined planes. Midline palatal suture- extends from the incisive papilla to the distal end of the hard palate.
What is the anatomy of the denture bearing surfaces?
A thorough knowledge of the anatomy of the denture bearing surfaces is paramount to designing and fabricating functional dentures. The functional anatomy of the denture foundation areas of the maxilla and mandible is presented in detail – in particular, the relationship of these anatomic structures that impact retention, stability and support.
Which area resists anterior displacement of the denture?
This area resists anterior displacement of the denture and is a secondary support area. Hamular Notch- this narrow cleft extends from the tuberosity to the pterygoid muscles.