1 / 31

Anatomy for Complete and Partial Dentures

Anatomy for Complete and Partial Dentures. Lips. Vermilion Border Denture provides lip support Affects vermilion border width. Lips. Philtrum Depression below nose. Lips. Nasolabial Angle Angle between columella of nose & philtrum of lip

yule
Download Presentation

Anatomy for Complete and Partial Dentures

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Anatomy for Complete and Partial Dentures

  2. Lips • Vermilion Border • Denture provides lip support • Affects vermilion border width

  3. Lips • Philtrum • Depression below nose

  4. Lips • Nasolabial Angle • Angle between columella of nose & philtrum of lip • Normally, approximately 90° as viewed in profile

  5. Lips • Tissue of the Upper Lip • Loose tissue of the upper lip can be gathered between your thumb and index finger

  6. Cheeks • Masseter Muscle • Closing muscle bulges into distal corner of buccal vestibule • Not active during impression making

  7. Residual Ridges • If ridges are severely resorbed, inform patient • “U”-shape • “V”-shape

  8. Vestibules • If vestibules are shallow, inform the patient

  9. Maxilla • Maxillary Tuberosities • Oversized • Resorbed • Undercut

  10. Maxilla • Maxillary Tuberosities • Oversized • Resorbed • Undercut

  11. Maxilla • Incisive Papilla • Landmark for setting of teeth

  12. Maxilla • “Hamular” Notch • Posterior border denture • Between the bony tuberosity and hamulus • “Soft displaceable tissue”, for comfort and retention

  13. Maxilla • “Hamular” Notch • Posterior border denture • Sometimes posterior to where the depression in the soft tissue appears • Use the head of your mirror to palpate the notch & mark with an indelible marker

  14. Maxilla • Soft Palate • Vibrating Line • Critical posterior border dentures • Junction of movable and immovable portions of the soft palate

  15. Maxilla • Glandular Tissue • Soft displaceable

  16. Maxilla • Soft Palate • Fovea Palatine • Bilateral indentations near midline of the soft palate • Close to the vibrating line

  17. Maxilla • Hard Palate • Median Palatine Raphe (midline palatine suture) • A bony midline structure • May require relief when covered by a denture

  18. Maxilla • Torus Palatinus • May require removal

  19. Mandible • Pear Shaped Pad • Soft pad containing glandular tissue • Inverted pear shape, posterior border • Created from scarring after extractions

  20. Mandible • Buccal Shelf • Primary denture bearing area of mandibular denture • Between height of bridge & external oblique ridge • Resorbs more slowly

  21. Mandible • Anterior Border of the Ramus • Do not extend dentures to ramus • Discomfort will result

  22. Mandible • External Oblique Ridge • Do not extend dentures to this ridge

  23. Mandible • Mylohyoid Ridge • Origin of mylohyoid muscle which influences length of lingual flange • Can be prominent, and/or sharp, requiring relief

  24. Mandible • Mylohyoid Ridge

  25. Mandible • Lingual Tori • Raised bony structures • May require relief when covered by a denture • Thin mucosa can ulcerate easily

  26. Mandible • Genial Tubercles • Attachment for the genioglossus muscle • Tubercles may be higher than the ridge with severe resorption

  27. Frena (singular = frenum) • Must be relieved to allow movement, without impingement • If prominent, adequate relief can weaken a denture • If too much relief, retention is lost • Check prominence intraorally

  28. Pterygo-Mandibular Raphe • Connects from the hamulus to the mylohyoid ridge • When prominent, can cause pain, or loosening • Requires relief “groove ” if prominent

  29. Retrozygomal Fossae (Space) • Palpate zygomatic process in buccal vestibule just buccal to first maxillary molar • Vestibular space posterior to zygoma

  30. Retrozygomal Fossae (Space) • Commonly incompletely captured in preliminary impressions • Use syringe technique

  31. Coronoid Process • Place mirror head lateral to tuberosity • Move mandible to opposite side • Note binding or pain • This gives some indication of the width of the space for flange

More Related