What is the buccal shelf area?
BUCCAL SHELF AREA It is the area between buccal frenum and anterior border of masseter muscle. BOUNDARIES: Medially-the crest of the ridge. Distally-the retromolar pad Laterally-the external oblique ridge.
Why buccal shelf area is considered as primary stress bearing area?
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. These two factors make it relatively resistant to resorption .
What is the importance of knowing and identifying the landmarks seen in edentulous maxillary and mandibular arches in fabricating a complete denture?
The landmarks of an edentulous jaw are grouped into limiting structures, supporting structures and relief area. These are the sites that will guide us in having an optimum extension of the denture so as to engage maximum surface area without encroaching upon the muscle actions.
What is the significance of retromolar pad?
Different shapes of retromolar pad helps in stability of lower denture by providing surface area, larger diameter contributes to broader surface area and better distribution of functional forces per unit area and plays a significant role in stability of lower denture [13].
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. Height and width: Denture stability is directly proportional to the height and width of the ridge. Resorbed ridges have poor stability.
What is meant by primary 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 is the denture bearing area?
Quick Reference. Those surfaces of the teeth and edentulous ridges covered by a denture.
What is the significance of Retromolar pad?
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.
Which anatomical landmark is lateral to the buccal shelf?
Buccal Shelf Area: It is bounded medially by the crest of residual ridge, laterally by the external oblique line, anteriorly by the buccal frenum and distally by the retromolar pad.