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COMPLETE DENTURE > PRELIMS > Flashcards

PRELIMS Flashcards

1
Q

Represents a compromise in the integrity of the masticatory system

A

Edentulous state

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2
Q

The relationship between the biologic behavior of oral structures and a physical influence of a dental restoration

A

Biomechanics in dentistry or dental biomechanics

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3
Q

Clinical implications of the biomechanical differences can be considered under the FF:

A
  1. Modifications in area of support
  2. Functional and Parafunctional considerations
  3. Changes in morphologic face height
  4. Cosmetic changes
  5. Adaptive responses
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4
Q

Teeth are supported by the

A

Periodontium

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5
Q

What comprises the periodontium

A

Hard CT:
- Cementum
- Bone
- PDL

Soft CT
- Lamina propria of the Gingiva

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6
Q

Periodontium is attached to the dentin by ___ and to the jawbone by the __.

A

cementum, alveolar process

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7
Q

Two principal functions of periodontium

A
  1. Support
  2. Positional adjustment of the tooth
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8
Q

Maximal bite forces appear to be __ to __ than for persons with natural teeth

A

FIVE to SIX times less

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9
Q

Mean denture- bearing area for edentulous maxilla

A

22.96cm2

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10
Q

The study of human movement including interaction between participant and equipment

A

Biomechanics

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11
Q

biomechanics are broken down into two broad areas:

A

Kinetics, kinematics

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12
Q

Study of internal and external forces acting on the body

A

Kinematics

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13
Q

Study of movements of the body as a result of these forces

A

Kinematics

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14
Q

Dentulous Masticatory load maximum bite force during chewing

A

20 kilos

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15
Q

Edentulous masticatory load maximum bite force during chewing

A

6 to 8 kilos

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16
Q

Movement of denture bases in any direction on their basal seats can cause ___

A

Tissue damage

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17
Q

Mean denture- bearing area for edentulous mandible

A

12.25 cm2

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18
Q

Mean denture- bearing area for dentulous maxilla

A

45 cm2

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19
Q

Mean denture- bearing area for dentulous mandible

A

45 cm2

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20
Q

Consists of denture-bearing mucosa, submucosa and periosteum, and the underlying residual alveolar bone

A

Residual ridge

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21
Q

The foundation for dentures

A

Residual ridge

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22
Q

How is residual ridge formed?

A

Alveolar process made edentulous by loss of teeth ➠ alveoli are filled in with new bone ➠ becomes the residual ridge

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23
Q

Development and adaptation of the occlusion

A
  • Developing dentition
  • Healthy adult dentition
  • Deteriorating adult dentition
  • The edentulous state
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24
Q
  • Extensive sensory input
  • Development of motor skills and neuromuscular learning
  • Dental, alveolar, craniofacial adaptability
A

Developing dentition

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25
Q
  • Dental adaptation (wearing, drifting, extrusion)
  • Bone adaptation is reparative
  • Learned protective reflexes
A

Healthy adult dentition

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26
Q
  • Partial edentulism
  • Periodontal disease
  • Diminished dental reflex adaptation
A

Deteriorating adult dentition

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27
Q
  • Residual ridge reduction
  • Compromised reflex adaptability
  • Increase in parafunctional movements
A

The edentulous state

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28
Q

Morphologic changes associated with the edentulous state

A
  • Deepening of the nasolabial groove
  • Loss of labiodental angle
  • Decrease in horizontal labial angle
  • Narrowing of lips
  • Increase in columella-philtral angle
  • Prognathic appearance
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29
Q

Soft tissue changes

A
  1. Soft tissue hyperplasia
  2. Denture stomatitis
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30
Q

Result of a fibroepithelial response to complete denture wearing

A

Soft tissue hyperplasia

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31
Q
  • It is often asymptomatic
  • May be limited to the tissues around the borders of the dentures in the vestibular, lingual, or palatal regions or part of the residual ridge
A

Soft tissue hyperplasia

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32
Q

Etiology of soft tissue hyperplasia

A
  1. Changes in the alveolar sockets during extractions
  2. Trauma from denture wearing
  3. Gradual residual ridge resorption
  4. Changes in soft tissue profile and TMJ functions
  5. Changes in relative proportions of both jaws
  6. Habits and duration of wear
  7. Aberrant forces to which the supporting tissues are subjected
  8. Expressive forces on limited segments
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33
Q

Hyperplasia occurring around the border of a denture

A

Epulis fissuratum

34
Q

Occurs in the free mucosa lining the sulcus or at the junction of the attached and free mucosa

A

Epulis fissuratum

35
Q

Develops as a result of chronic irritation from ill-fitting or overextended dentures

A

Epulis fissuratum

36
Q

Treatment of epulis fissuratum

A

Surgical excision only after a period f prescribed tissue rest to reduce edema

37
Q
  • Chronic inflammation of the denture-bearing mucosa
  • Asymptomatic; may be localized or generalized
A

Denture stomatitis

38
Q

Causes of denture stomatitis

A
  • Nocturnal denture wear
  • Trauma from ill-fitting dentures or parafunctional habit (predominant etiologic factor)
  • Hypersensitivity to some component of the denture material with consequent allergic response
39
Q

Treatment of denture stomatitis

A
  1. oral and denture hygiene accompanied by tissue rest
  2. Antifungal therapy
  3. Surgical excision of papillomatosis by electrosurgery or cryosurgery
40
Q
  • Sometimes painful inflammation of the corners of the mouth
  • Attributed to a reduction of the vertical dimension of occlusion
A

Angular cheilitis

41
Q

period of senescence

A
  • Oral changes
  • Mucosa and skin atrophy
  • Physiologic changes
42
Q

period of senescence (oral changes)

A
  • Changes in the size of the basal seat
  • Disuse atrophy
  • Alterations in the sense of taste
  • Dryness of mouth
  • Reduction of masticatory activity
43
Q

Mechanism of complete denture support

A

i. Masticatory loads
ii. Mucosa support
iii. Residual ridge
iv. Physiological effect on retention

44
Q

Basic challenge in the treatment of edentulous patients:

A

Difference between the ways natural teeth and their artificial replacements are supported

45
Q

Minimal tolerance of the denture-bearing area can be reduced further by the presence of __

A

Systemic diseases

46
Q

Residual ridge consists of:

A
  • Denture-bearing mucosa
  • submucosa
  • periosteum
  • underlying resiudal aveolar bone
47
Q

what to do to avoid residual ridge reduction

A

Dentist should preserve and protect any remaining teeth

48
Q

Direction of bone resorption: maxilla

A

resorbs UPWARD and INWARD to become progressively smaller

49
Q

Direction of bone resorption: mandible

A

Inclines OUTWARD, and becomes progressively wider

50
Q

the changes in the edentulous and maxilla makes the patients appear ___.

A

Prognathic

51
Q

Physical factors affecting retention of complete denture under the control of the dentist

A
  • Maximal extension of the denture base
  • Maximal intimate contact of the denture base and the basal seat
52
Q

Muscular factors affecting retention of complete denture under the control of the dentist

A
  • Buccinator muscle
  • Orbicularis oris
    Intrinsic and extrinsic muscles of tongue
53
Q

if there is low salivary flow then there is ___

A

Low denture retention

54
Q

Consists of a rhythmic separation and apposition of the jaws

A

Mastication

55
Q

these muscles keep the food bolus between the occlusal surfaces of the teeth

A

Tongue and cheek muscles

55
Q

importance of the placement of artificial teeth in making of complete dentures

A

teeth must be placed within the confines of a functional balance of the musculature involved in controlling food bolus between the occlusal surfaces of the teeth

56
Q

Complete dentures important note

A

CD are poor substitutes for natural teeth. these serve as prosthesis for missing teeth

57
Q

Any habitual use of the mouth not related to eating, drinking, or speaking

A

Parafunction habits (bruxism, tongue-thrusting, mouth breathing)

58
Q

Common and frequent cause of soreness of the denture-bearing mucous membrane

A

bruxism

59
Q

dentists may seek to minimize force distributioon by

A
  1. Maximize denture base coverage
  2. Occlusal surface of artificial teeth be made smaller
60
Q

during swallowing or chewing, the amount of force generated by px masticatory system is __ by the dentists

A

not controlled

61
Q

how to reduce occlusal load per unit area of mucosa

A

CD base extension within morphological and functional limits

62
Q

terminal stage of skeletal growth is usually at what age

A

20-25 y.o but growth and remodeling of bony skeletoon continue well into adult life

63
Q

reduction of residual ridges causes reduction in total face height resulting to

A

Mandibular prognathism

64
Q

Position of the condylar head in the fossa and its relative position

A

Centric relation and centric occlusion

65
Q
  • most posterior position of the mandible
  • most often, the teeth dont come together normally
A

Centric relation

66
Q

centric relation position is dictated by the __

A

Condylar head/ fossa

67
Q
  • habitual position
  • position of the condylar head can be ANYWHERE within the fossa
A

Centric occlusion

68
Q

often dictated by habit and teeth that give the “right feel” feeling when you bite

A

Centric occlusion

69
Q

most posterior position of the mandible relative to the maxilla at the established vertical dimension

A

Centric relation

70
Q
  • Coincides with a reproducible posterior hinge position of the mandible
  • unconscious swallowing is carried out with the mandible at or near this position
A

Centric relation

71
Q

Mandibular position anterior to centric relation where most functional natural tooth contacts occur

A

Centric occlusion

72
Q

Impaired dental efficiency resulting from partial tooth loss and absence of, or incorrect, prosthodontic treatment

A

temporomandibular disorders (TMD)

73
Q

Denture wearers suffer DJD more frequently than persons with complete natural dentitions

A

Degenerative Joint disease (DJD)

74
Q
  • it is a process rather than a disease
  • may be age-related rather than due to the state of dentition
A

Degenerative joint disease (DJD)

75
Q

individual behavioral and adaptive responses

A
  1. Cosmetic changes
  2. Dietary changes
  3. Adaptive and Physiological responses
  4. Adaptive potential of the patient
76
Q

this determines the degree of success of clinical treatment

A

patient’s ability and willingness to accept and learn to use dentures

77
Q
  • it extends from the labial aspect of the residual ride to the lip
  • no muscle fibers
A

Labial frenum

78
Q

v-shaped notch to prevent interference with the frenum

A

Labial notch

79
Q

Clinical significance of labial frenum and notch

A

has to be relieved in impressions to prevent dislodgement of denture and prevent uilceration

80
Q

Categories in anatomy of denture bearing areas (Maxila)

A
  1. Limiting structures
  2. Supporting structures
  3. Relief areas
81
Q
A

COMPLETE DENTURE (1 decks)

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