Which is the stress bearing area in mandible and why?

MANDIBLE

What are primary stress bearing areas?

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.

Why buccal shelf area is primary stress bearing area in mandible?

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 .

Which part of hard palate is primary stress bearing area?

Buccal shelf area:- It act as a primary stress bearing area , located between the buccal frenum and anterior border of the masseter muscle. It lies at right angles to the occlusal forces.

Why is it called primary stress bearing area?

 The horizontal of the hard palate provides the PRIMARY STRESS- BEARING AREA. CLINICAL SIGNIFICANCE  The trabecular pattern in the bone is perpendicular to the direction of force, making it capable of withstanding any amount of force without marked resorption.

What is a denture-bearing area?

Those surfaces of the teeth and edentulous ridges covered by a denture. From: denture-bearing area in A Dictionary of Dentistry » Subjects: Medicine and health — Dentistry.

What do you mean by primary and secondary stress bearing areas?

 The primary stress-bearing areas generally have thicker mucosa and /or underlying bone that is less subject to resorption because it is cortical bone.  The residual ridge is generally a secondary stress-bearing area as it is made up of cancellous bone.

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 are the primary stress bearing structures for maxillary edentulous arch?

The ultimate support for a maxillary denture Consists of the two maxillae and palatine bone, provides the primary stress bearing area for the denture. in the edentulous mouth it comes to lie nearer on or labial to R.R crest due to bone resorption. the incisive papilla to the distal end of the hard palate.

What is secondary stress in English?

Secondary stress (or obsolete: secondary accent) is the weaker of two degrees of stress in the pronunciation of a word, the stronger degree of stress being called primary. Another tradition in English is to assign acute and grave accents for primary and secondary stress, respectively: pronùnciátion.

When dentures are not in the mouth where should they be stored?

When your dentures aren’t in your mouth, it’s important to store them in liquid so they don’t dry out. If dentures dry out, they may become warped or cracked. After you remove your dentures, clean them thoroughly and gently, and then place them in water or a denture-cleanser soaking solution.

What is residual ridge?

INTRODUCTION Residual ridge is a term used to describe the shape of the clinical alveolar ridge after healing of bone and soft tissues after tooth extractions. It consists of the denture-bearing mucosa, submucosa and periosteum, and the underlying residual alveolar bone.

What is the secondary stress bearing area of the mandible?

The mucous membrane covering the crest of residual ridge is similar to that of maxillary ridge, underlying bone is cancellous in nature, so considered as secondary stress-bearing area. The mylohyoid line is an irregular rough bony crest extending from 3rd molar to lower border of mandible in region of chin.

How are denture bearing areas related to the mandible?

ANATOMY OF DENTURE BEARING AREAS- MANDIBLE  These are areas in mandible that are closely related to the base of the mandibular complete denture. They are covered with mucosa and sub mucosa of varying degree of thickness and compressiblity.  The anatomical landmarks in the mandible are ; LIMITING STRUCTURES SUPPORTING STRUCTURES RELIEF AREAS

Which is the primary stress bearing area of the palate?

RUGAE  These are the mucosal folds located in the anterior region of the palatal mucosa.  In the area of rugae, the palate is set at an angle to the residual alveolar ridge and is thinly covered by soft tissue which contributes to the secondary stress bearing area.

What makes the buccal shelf a stress bearing area?

The mucous membrane covering the buccal shelf area is loosely attached, less keratinized & contains thick submucosal layer. Considered as a primary stress-bearing area because it is covered by a layer of cortical bone, & it lies at right angles to vertical occlusal forces