prosthodontics new 3rd year

1. LANDMARKS OF
COMPLETE
DENTURE
FOUNDATION
AREA
By
Dr Osama Askar
BDS. MSC. PHD. Faculty of Dentistry
Mansoura University,

2. WHY WE SHOULD KNOW THAT?
To have the knowledge about the nature of denture
supporting and limiting structures, which allow me to
construct a complete denture with maximum stability,
retention and support. That denture can give me maximum
comfort, function, esthetic and preservation of remaining
structures

3. INTRA ORAL MAXILLARY ANATOMICAL
LAND MARKS
1.SUPPORTING
STRUCTURES
2.RELIEF
STRUCTURES
3.LIMITING
STRUCTURES

4. CRITERIA OF STRESS BEARING AREA
1.Formed from dense bone with its trabeculae oriented
perpendicular to occlusal forces
2.Even thickness submucosa with structures act as
cushion (muscle fibers, salivary gland, fat tissue) and
firmly attached to bone
3.Covered with moderate and even thickness of
keratenized stratified squamous cell masticatory
mucosa.
4.To be oriented at wright angle to occlusal forces

5. MAXILLARY
ANATOMICAL
LANDMARKS

6. 1 supporting structures
• Hard palate
• Rougae area
• Maxillary tuberosity
• Residual alveolar ridge
2 Relief areas
• Incisive papilla
• Median palatine raphae
• Torus palatinus
• Foveae palatine
3 Limiting structures
• Labial frenum
• Labial vestibule
• Buccal frenum
• Buccal vestibule
• Hamular notch
• Soft palate,
vibrating line and
posterior palatal
seal

7. Hard palate and palatine vault

8. Flat shaped
Palatal Vault
Shapes
U - shaped
V - shaped

10. Oval shaped
Square shaped
U - shaped
V - shaped
Residual ridge
arch formes

12. Maxillary Tuberosity

13. Palatine rugae
1 ry bearingFlappyinclined

14. Incisive papilla

15. Prosthetic
significance of
incisive papilla

16. Median Palatine raphe

17. Torus Palatinus

19. Fovea Palatinae

20. Limiting structures
• Labial frenum
• Labial vestibule
• Buccal frenum
• Buccal vestibule
• Hamular notch
• Soft palate, vibrating line
and posterior palatal seal

21. Labial Frenum

22. Buccal Frenum

23. Hamular notch

24. Soft palate vibrating line and PPS area

25. Arbitrary
Determination of
PPS area

26. MANDIBULAR
ANATOMICAL
LANDMARKS

27. 1 supporting structures
• Buccal shelf area
• Residual alveolar ridge
• External oblique ridge
2 Relief areas
• Mental foramen area
• Internal oblique ridge
• Torus Mandibularis
• Genial tubercles
3 Limiting structures
• Labial frenum
• Labial vestibule
• Buccal frenum
• Buccal vestibule
• Retromolar pad
• Lingual frenum
• Lingual vestibule
(sublingual cresent
area, mylohyoid
area,
retromylohyoid area
or lingual pouch)

28. Residual alveolar ridge

29. Buccal shelf of bone

32. Retromolar Pad

33. Significance of Retromolar pad

34. Mental Foramen

35. Internal oblique ridge

37. Torus Mandibularis

38. Genial tubercle

39. LIMITING STRUCTURES OF LOWER
DENTURE
• Labial frenum
• Labial vestibule
• Buccal frenum
• Buccal vestibule
• Masseter influencing area
• Retromolar pad
• Lingual pouch (alveolingual sulcus) from lingual frenum to
retromylohyoid Curtin consists of 1Sublingual cresent area
2 Mylohyoid area
3Retromylohyoid area or lingual pouch

40. Retromylohyoid Curtin