15. • 5. Cheek and or lip biting
• For cheeks-likely that functional width of
sulcus was not restored ; for lips-poor lip
support/inadequate anterior horizontal
overlap
• for cheek biting – restore functional width
of sulcus and/or reset; for lips-grind
incisors to provide a more appropriate
incisal guidance angle
15
16. 6. Tongue biting
• Lack of lingual overjet-teeth generally
placed lingual to lower ridge
• Remove lower lingual cusps, or reset teeth
16
20. Factors resulting in looseness of dentures-
arising from decreased retention factors
20
A. Lack of Peripheral Seal
21. • B
• Inelasticity of cheek tissue
• Aging
• Softened tracing compound
21
22. c. Air beneath the impression surface
• Causes:
o deficient impression,
o damaged cast,
o warped denture,
o over adjustment of
impression surface,
o RRR,
o under cut,
o excessive relief ,
o change in fluid content of
supporting tissue.
22
Treatment :
Reline
Remake
Stabilise fluid content of
tissue & use minimal
pressure impression
method.
23. d. Xerostomia
• Medication
• Radiation H & N region
• Salivary gland disease
Design denture to maximise retention
Artificial saliva
23
25. Factors resulting in looseness of dentures :
arising from increased displacing force
25
26. Factors resulting in looseness of dentures : arising from
increased displacing force
-occlusal and anatomical factors
• 1. occlusal errors :
Causes :
• uneven tooth contact – tilting of dentures,
prevents seating
• lack of freedom in ICP- denture will shift
26
27. • 2.ulceration labial to lower ridge
Excessive vertical overlap of anterior teeth
Last mandibular molars placed too far
posteriorly
27
28. • 3. fibrous displaceable ridge
Masticatory forces tend to cause denture
to sink into and tilt towards supporting
tissues
Reline
28
29. • 4.bony prominences covered with thin
mucosa
o Denture rocks over prominences
29
30. • 5. Non-resilient soft tissue
Does not adapt to impression surface of
denture reducing support and retention
factors
Reline , use low viscosity imp. material
30
31. • 6. pain avoidance mechanisms :
Use of excessive amounts of fixative , or
self-applied reline material
Eliminate the cause of pain.
31
32. List of denture problems associated with
problems of adaptation
32
Noise on eating or speakingNoise on eating or speaking
Eating difficultiesEating difficulties
Blunt
teeth
Blunt
teeth
Jaws close too farJaws close too far
Not wide enoughNot wide enough
Speech problemsSpeech problems
GaggingGagging
AppearanceAppearance
Too much visibility of
teeth
Too much visibility of
teeth
Creases at corners of
mouth
Creases at corners of
mouth
Colour of denture base
material ‘unnatural’
Colour of denture base
material ‘unnatural’
33. 1. Noise on eating /speaking
• Increased OVD
• Occlusal interferences
• Poor perception of patient to denture
wearing
• Loose denture
33
40. 8. Appearance
• Patient failed to comment at trial stage
• Replacement ?
• Teeth – too light /dark !!
_ too small / big !!
_ arrangement-too even / irregular
or lacking diastema
“ Accurate assessment of patient’s
requirements “ 40
41. 9.Too much visibility of teeth
• Level of occlusal plane – unacceptable
• Placed on upper anterior ridge
• No proper lip support
41
42. 10. Creases at corners of mouth
• Labial fullness and anterior tooth position
• OVD
42