Anatomic landmarks for B.D.S students
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Anatomical Landmarks of cast for B.D.S students ..
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Anatomic landmarks for B.D.S students
- 2. DENTURE BEARING AREAS • Supporting structures - primary stress bearing areas - secondary stress bearing areas - relief areas • Peripheral seal areas • Limiting structures
- 4. Limiting structures • Labial frenum • Labial vestibule • Buccal frenum • Buccal vestibule • Hamular notch • Posterior palatal seal area
- 5. Support areas • PRIMARY -Posterior ridge -Flat part of hard palate • SECONDARY -Slopes of ridges -Anterior ridge -Palatine rugae
- 6. RELIEF AREAS • INCISIVE PAPILLA • MID PALATINE RAPHE
- 10. Buccal vestibule
- 11. Hamular notch Area of hamular notch
- 12. Vibrating line:
- 13. Fovea Palatinae
- 14. POSTDAM AREA
- 15. Maxillary tuberosity. Area of tuberosity
- 16. Hard palate
- 17. RESIDUAL ALVEOLAR RIDGE Alveolar groove
- 18. Rugae. • .
- 20. •. Median palatine raphae. Median palatine groove
- 21. MANDIBULAR ARCH
- 22. PERIPHERAL STRUCTURES • Labial frenum • Labial vestibule • Buccal frenum • Buccal vestibule • Alveololingual sulcus • Retromolar pads
- 23. SUPPORT AREAS • PRIMARY • Buccal shelf area • Posterior ridge • Pear shaped pad (levin) • SECONDARY • Anterior ridge • Slopes of ridge
- 24. RELIEF AREAS • Crest of ridge • Mental foramen • Genial tubercles • Torus mandibularis
- 26. Labial vestibule. • M u Labial flange
- 31. Retromylohyoid space. • . Retromylohyoid eminence
- 33. Buccal shelf •
Editor's Notes
- Band of fibrous conn. Tissue Has no muscle fibres So, a passive frenum V-shaped notch is recorded in impression
- Separates the labial and buccal vestibule. Attach of the followig muscles Levator anguli oris orbicularis oris buccinator
- That portion of the oral cavity which is bounded on one side by the teeth ,gingiva and alveolar ridge and on other side by the lip & cheeks The vestibule is covered by the lining mucosa
- It extends from Buccal frenum to hamular notch.
- Distal to maxillary tuberosity
- Junction of movable and immovable part of soft palate. 2mm anteriorly to fovea palatinae
- Bilateral indentations near the midline of palate. Formed by coalescence of several mucous gland ducts. Posterior to junction of hard and soft palate. Aids in determining vibrating line.
- Junction between soft palate and hard palate Consists of 2 parts -pterygomaxillary seal -postpalatal seal
- Bulbous extension of residual ridge in 2nd & 3rd molar region. Gross enlargement (fibrous or bony –surgical correction).
- Support for the maxillary denture. Primary stress bearing area- horizontal portion of hard palate lateral to midline. Secondary stress bearing area –rugae.
- Residual bone covered by soft tissue Primary SBA – Posterior part Secondary SBA - crest of ridge
- Secondary stress bearing area. Should not be distorted in the impression.
- Relief necessary. Impingement –burning sensation, parasthesia and pain. Relief necessary.
- Extends from incisive papilla to distal end of hard palate Relieve adequately to avoid trauma from denture base.
- -Buccinator fibres attached to the frenum -Adequate relief
- Between Labial-buccal frenum.
- Buccal frenum to retromolar pad. Impression is widest in this area. Record adequate depth and width.
- Triangular soft pad of tissue,distal to 3rd molar region SUBMUCOSA- Loose conn. Tissue , mucous glands, fibres of buccinator, sup.constrictor, temporalis MUCOSA-keratinised .
- Fold of mucous membrane. Base of tongue to supra genial tubercle.
- Between lingual frenum to retromylohyoid curtain. Anterior region- lingual frenum to mylohyoid ridge. Premylohyoid fossa- premylohyoid eminence in impression. Border of Impression to make contact with the mucosa of the floor of the mouth when tongue touches the upper incisor. Overextension causes soreness and instability.
- Distal end of lingual sulcus. Area posterior to the mylohyoid muscle. Good seal aids in retention and stability.
- Area of muscle attachment (Genioglossus and Geniohyoid). Lies away from the crest of the ridge. Prominent in Resorbed ridges. Adequate relief to be provided.
- Area between the buccal frenum and anterior border of the masseter Primary stress bearing area-
- Residual bone with mucous membrane. Crest to be relieved. Buccal and lingual slopes are secondary stress bearing areas.