posterior border of the denture

Between the bony tuberosity and hamulus

“Soft displaceable tissue”, for comfort and retention

Use the head of your mirror to palpate the notch & mark with an indelible marker

how can we located ?

- Bony ridge running downward and forward from ramus to reach mental foramen.

- It is a limiting structure to the complete denture and not extend to it.

- Pear-shaped area located distal to the lower 3rd molar.

- Shock absorbent.

- Gives retention not support.

- Determine the level of the Occlusal plane.

The horizontal portion of the hard palate to the midline

Slopes of residual alveolar ridge

Rugae area

Maxillary Tuberosity

Buccal shelf area

residual ridge

- Pear-shaped elevation present in the midline behind the 2 centrals.

- After extraction of teeth it migrates to the crest of the ridge.

- It should be relieved to avoid the burning sensation of the palate.

- The mucoperiostium that covers the median palatine suture.

- When it is prominent it should be relieved.

- Lack of relief cause:

- Two openings of minor salivary glands present in both sides of the midline posterior to junction of hard and soft palate.

- It determines the posterior extension of the upper complete denture to be 2mm posterior to it.

- Bony prominence present at both sides of the midline of the palate.

- It should be:

- It's located on the Buccal surface of the mandible between the roots of 1st and 2nd premolar.

- Lack of relief → numbness of the lower lip.

- Bony prominence located at the inner surface of premolar area.

- It should be:

- Irregular bony ridge of median surface of the mandible which the Mylohyoid muscle attached.

- It should be relieved during complete denture construction.

- Two bony projections present at the median surface of mandible at midline of each side of symphesis.

- Represent the attachment of geniohyiod and genioglossus muscles.

- If it's prominent, it should be relieved.

if the muscle interferes with border formation, it may surgical detached and repositioned at lower level

the position and action of this muscle is dependent on proper:

The superior portion of the muscle influences the hight of distobuccal flange of the maxillary denture.

contraction of the buccinator pulls the maxillary and mandibular buccal frenae backward.

in the buccal shelf area the mandibular denture rest on fibers of the buccinator. however because the fiber run anteroposteriorly. contraction does not unseat the denture

functional movement of mentalis are important in determining the: