Temporary removable partial dentures are used for a limited period of time until a more definitive prosthesis can be provided. They serve several objectives like reestablishing esthetics, maintaining space, improving patient tolerance, and conditioning tissues. Some common types of temporary RPDs include interim, transitional, treatment, and immediate RPDs. Acrylic partial dentures are lightweight alternatives to metal partial dentures that are less expensive and easier to construct but also weaker and less hygienic. Their design incorporates acrylic resin, acrylic teeth, and wire clasps.

3. Other Forms of Removable Partial Denture
Dr. Amal Fathy Kaddah
Professor of Prosthodontic
Faculty of Dentistry
Cairo University

4. The secret of friendship is being a good
listener

6.  Is a dental prosthesis that substitute
teeth and associated structures in
partially edentulous arch made from
acrylic resin and can be removed
and replaced at will.
Temporary removable partial
dentures

7. Temporary RPD:
 A removable prosthesis that is used
temporarily for a period of time until
a more definitive prosthesis can be
provided.

8. 1. Reestablish Esthetic or Appearance.
2. Maintenance of space.
3. Improving patient tolerance for wearing a
prosthesis
4. Reestablishing occlusal relationships.
5. Conditioning teeth and residual ridges.
6. An interim restoration during treatment.
objectives:

9. 1- Reestablish Esthetic or
Appearance.
Before and After construction of the
immediate treatment partial denture

10. 2. Maintenance of space
 In young patients the space should be
maintained until the adjacent teeth have
reached sufficient maturity to be used as
abutments for fixed restorations
 In adult patients can prevent undesirable
migration and extrusion of adjacent or
opposing teeth until definitive treatment
can be accomplished.

11. Space maintenance
Aesthetics
Improving patient tolerance

12. 3. Improving patient tolerance
for wearing a prosthesis
 Allows a period in which
the patient can gradually
adapt to permanent
prosthesis.

13. 4. Reestablishment of occlusal
relationships
Temporary RPDs may be used
as occlusal splint
 To establish a new occlusal
relationship or occlusal vertical
dimension

14. The increase in occlusal vertical
dimension is sometimes necessary to
accommodate the required restorations,
to be tolerated by the patient

15. 5. To condition teeth and ridge
tissue
Temporary RPDs or occlusal
splint
 Prepare or condition the teeth and
ridge tissue for the definitive
removable partial denture that will
follow.
Carry tissue treatment material to
abused oral tissues.

16. 6. Interim restoration during
treatment
 Replaced with fixed restorations
 Age
 Newly extraction
 Implant healing period

17. An interim denture can be helpful in
patients exhibiting gingival trauma
as a result of a deep incisal overbite

18. Prevention of gingival trauma should not be
attempted with an onlay appliance covering
only the posterior teeth as continued
eruption of the anterior teeth may result in
the original traumatic relationship

19. In the young patient the palatal table may
allowing further eruption of the posterior
teeth and causing some intrusion of the
mandibular anterior teeth

20. Indications
1. Young Patients
2. Elderly Patients whose health
contraindicates lengthy and physically
tiring procedures
3. When cost is a prime requisite, and
patients who cannot afford the
expenses of metallic pd or fixed
restorations

21. Indications
4.When a diagnostic or interim
(Temporary) partial denture is
required before a definite
restoration.
5.As a template for implant
location

22. Indications
6. Treatment Partial Denture
A. Carry tissue treatment material to abused
oral tissues.
B. To re-establish the vertical dimension of
occlusion .
C. As a splint following surgical corrections
D. As a night guard or mouth protective
device to correct or control undesirable
oral habits, or to protect the mouth and
teeth from trauma.

23. Advantages of acrylic partial dentures
over Cobalt Chrome partial dentures
 Light in weight.
 Good appearance
 Not expensive (Low cost)
 Easy to construct and to repair
 Less laboratory and clinical
time consuming

24. Disadvantages of acrylic partial
dentures
 Poor thermal conductivity
 Lower strength (easily broken)
 Less hygienic
 Tendency for warpage if
overheated during polishing.

25. Types of Temporary RPDs
A. Interim Removable Partial
Denture (RPD)
B. Transitional RPD
C. Treatment RPD
D. Immediate RPD

26.  Removable partial dentures that is
used temporarily for a period of
time until a more definitive
prosthesis can be provided.
Temporary RPDs

27. A- Interim Removable partial dentures
Definition:
It is dental prosthesis used for a limited
period of time to enhance:
• Esthetics
• Function (mastication and speech)
• Occlusal support
• Stabilization and Convenience.

28.  Is to condition the patient to
the acceptance of an
artificial substitute for
missing natural teeth until
more definitive prosthodontic
therapy can be provided
Objectives of using an Interim RPD

29.  It may be indicated when age and
time factors may prohibit the
construction of the definitive
prosthesis.
(Permanent in some cases)
Objectives of using an Interim RPD

30. Interim Removable Partial
Dentures
 Short period of time
 Prior to a definitive denture
 Acrylic major
connector, wrought
wire clasps

31. Indications
 Large pulps (can’t fabricate bridge)
 Clinical crowns too short
 No usable undercuts
 Children - permanent prosthesis would
be quickly outgrown
 Temporary space maintenance (caries,
trauma, congenitally missing teeth)

32. Temporary space maintenance
(congenitally missing teeth)

34.  Temporary time or financial
constraints
 Sudden loss of teeth, before sufficient
healing has occurred (accidents, after
extractions)
Indications

37. B- Transitional RPD
 Transition to a complete denture
 Teeth need to be extracted but not
immediately (medically
compromised)
 Patient is not psychologically
prepared

38.  As will be replaced by the definitive
prosthesis after tissue changes have
occurred.
 i.e. Not all the artificial teeth will be
replaced at the same time (one by one).
 It may become an interim complete
denture when all natural teeth have
been removed from the dental arch.

39. Transition to a
complete denture

40. Transition to a
complete denture

41. Transition to a
complete denture

42. C- Treatment Removable PD
 Improve a condition before a
definitive denture
 It is another form of Temporary
prosthesis that is used to
improve, treating or conditioning
the tissues.

43. Tissue conditioning
Treatment Denture

44.  Papillary hyperplasia (massage, Brushing,
With or without surgery)
 Acute inflammation (increase tissue
adaptation and redistribute the stress)
 May use the existing denture or a new
treatment denture may be made
Tissue conditioning
Treatment Denture

45. Epulis Fissuratum
Ill fitting and over
extended denture
Treatment Denture

46. • Alteration of vertical dimension /
occlusion
• Determine how patient will respond to
changes (TMD)
• Surgical Splint
Removal of palatal tori
Treatment Denture

47. Occlusal Splint
Determine how patient will
respond to changes (TMD)
Treatment Denture

48. Occlusal Splint

49. Implant healing
Treatment Denture

50. D- Immediate RPD
 It is a partial denture
constructed before the
extraction of unwanted teeth
and is inserted immediately
after their extraction.

51. D- Immediate RPD

52. Immediate
interim
denture

53. Immediate treatment partial
• Support
• Stability
• Retention

54. Definitive cast partial
• Support
• Stability
• Retention

56. Designing of acrylic partial
dentures

57. An acrylic removable partial denture
consists of:
 Acrylic resin denture base
 Acrylic teeth
 Wrought wire or cast clasps:
 Simple Circlet Clasp
 Half Jackson Clasp or Adam’s Crib:

58. Design
 Clasps (Wrought wire 0.02”)
 Circumferential

59.  Clasps (Wrought wire 0.02”)
 Ball clasps
Rest and retentive elements
Design

60.  Clasps (Wrought wire 0.02”)
 Adams clasps
 Rest and retentive elements
Design

61.  Bracing
 Lingual/palatal major connector
provides bracing
 Contacts teeth at the heights of
contour
Design

62.  Rests
 Usually wrought wire
 Acrylic may be used over cingulum
rest seats
 Longer term use
- cast retainers
Design

63. Design
 Major Connectors
 Full palatal coverage increases
strength & stability
 Extend denture to first molar
 Retentive clasps embedded into
major connector

64. Adjustment
(McCracken's Removable Partial
Prosthodontics, 11th Edition.
Elsevier, 2005)
Commonly adjust:
• Interproximal extensions (A)
• Where clasp exits from resin (B)
• Tissue undercuts (C)

65. Forms of acrylic RPD
1- Spoon denture
2- Every’s denture

66.  It is mucosa borne acylic RPD without
clasps that replaces missing maxillary
anterior teeth.
Spoon denture
 Dentures whose
retention depends
primarily on control
by the patient’s
musculature.

67. Where an acrylic denture is provided, tissue damage
is minimized by careful design of “spoon” denture.
It reduces gingival margin coverage to a minimum
but a potential hazard is the risk of inhalation or
ingestion.
aid stability and retention

68. Spoon denture was modified by frictional
contact between the connector and the
palatal surfaces of some of the posterior
teeth or by adding wrought wire clasps.

69. Which can be used for restoring multiple
bounded saddle areas in the upper jaw.
Every denture

70. Six principles are:
1. Arch completed through a series of contact points
2. Flanges establish lateral and antero-posterior
stability
3. Large denture base for retention and support
(maximum area coverage within physiological
limit)
4. Denture base with wide embrasures to preserve
gingival health (reduces gingival margin coverage
to a minimum)
5. Free occlusion to minimize occlusal forces
6. Post damming to improve retention

71. The inaccurate fit will encourage plaque
formation with consequent periodontal disease
and caries, thus introducing an unnecessary and
avoidable risk to oral health.
Disadvantage

72.  All denture borders are at least 3 mm
from the gingival margins.
 The “open” design of saddle/tooth
junction is employed.
Every denture

73.  Point contact between the artificial teeth and
abutment teeth is established to reduce
lateral stress to a minimum.
Every denture
 Posterior wire “stops” are
included to prevent distal
drift of the posterior teeth
with consequent loss of
the contact points.

74. Posterior wire “stops”

75.  Flanges are included to assist the
bracing of the denture.
Every denture
 Lateral stresses are
reduced by achieving as
much balanced occlusion
and articulation as possible.

76.  Which has extensions into undercuts
on the labial surfaces of the teeth.
The swing-lock RPD

77. It consists of a labial/buccal retaining bar,
hinged at one end and locked with a latch
at the other, together with
The swing-lock RPD
a reciprocating lingual
plate to gain a
maximum retention and
stability.

78. The bar incorporate rigid struts or
an acrylic veneer which make
prosthesis immobile.
The swing-lock RPD

79. INDICATIONS
 Missing key abutment
 Reduced bone support

80.  Unfavorable tooth contour
 Unilateral abutments

81. The retching ( gagging)
Patient
Maxillofacial defects

82. CONTRINDICATIONS
Poor oral hygiene
High smile line
Soft-tissue limitations
Certain malocclusion
Alveolar limitations

83.  The denture can be particularly
helpful where the remaining
natural teeth offer very little
undercut for conventional clasp
retention.
Advantages

84.  The “gate” can carry a labial acrylic
veneer. This veneer can be used to
improve the appearance when a
considerable amount of root surface
has been exposed following
periodontal surgery.
Advantages

85. Disadvantage
 As this type of denture covers a
considerable amount of gingival
margin, the standard of plaque
control must be high.

86. Gingival recession

87. Interim Prosthesis Fabrication

88. Clinical Steps for Interim RPDs
1. History, examination, and proper treatment
planning
2. Mouth preparation (endodontic, periodontal,
surgery)
3. Upper and Lower impressions
4. Pour the casts
5. Maxillo-mandibular relations (occlusal
vertical dimension, centric record )
6. Articulate the casts
7. Draw design for interim partial denture

89.  Preliminary impressions
 Design the definitive partial
denture (interim denture will
use similar design)
Interim Prosthesis Fabrication

90. Interim Prosthesis Fabrication
 Optional Step (preferred)
 Tooth preparations for a
definitive RPD
 New alginate impression
 Mouth preparation (endodontic,
periodontal, surgery)

91.  Maxillo-mandibular relations
 Articulate casts
Interim Prosthesis Fabrication

92. Take care when
Utilizing Acrylic Interim Partials

93. 1. ‘Flipper’ Gum strip
 Slang - No Clasps

94. A) The mucosa will become inflamed and
the bone will resorb.
B) The amount of bone which has been
destroyed is apparent when the
denture is removed.
A) B)

95. Take care
Utilizing Acrylic Interim Partials
2. Patients can be more
susceptible to caries as the
acrylic pd and remaining
natural teeth can become
target for plaque accumulation

96. 3. Patients need Extra
prophylactic measures such as
more frequent hygiene visits
and regular use of fluoride
should be recommended.

97. 4. Patients who insist on
wearing their prosthesis
while they sleep should
leave their partial out for
several hours during the day
(tissue rest)

98. 5. When using clasps for retention,
care should be taken not to
interfere with patient’s normal
occlusion.
Occlusal interferences are one of
the main reasons for poor
patient compliance with these
appliances.

99. doesn’t need
it.
and the
person who
dislike you
won’t believe
Because the person who
likes you
Never explain yourself to
anyone.

100. Denture base extended on to the teeth
to aid stability and retention. This
extension also provides support

101. Wire "stops" must be included on the distal
surface of the most distally placed natural
teeth in the arch. In addition to providing point
contact, the stops also help to prevent anterior
movement of the denture base as well as distal
movement of the natural teeth.

102. “Every” design principles dictate that
denture coverage should always be minimal
to prevent accumulation of plaque and
mechanical irritation of the gingivae.

103. An Every denture covers a large palatal area yet
its contact with the standing teeth is minimal.
Resistance to anterior displacement is also
derived from the stops placed on the distal
surface of the molar teeth

104.  Connectors to the saddles should
be narrow to provide suitable
clearance for the gingivae

105.  A minimum clearance of 3 mm is
regarded as a satisfactory
distance.

106.  The denture base must not encroach on
the gingivae. A detrimental effect on
these tissues can result from mechanical
irritation and stagnation of food debris.

107.  Care must be taken to prevent inter-
proximal stagnation areas by
creating self-cleansing wide
embrasures as illustrated here.

108.  Stability of the Every denture against
lateral and posterior displacement is
achieved by the incorporation of
labial and buccal flanges

109.  Correct extension of the flanges is
important as over or under extension
will affect denture stability.

110. Creating "free" occlusion is an
essential feature for stability
 b, Free occlusion in
lateral excursion
 a, Centric occlusion

111. When free occlusion is created cuspal interference is
eliminated during jaw movements: This helps to
preserve stability of the denture and minimize trauma.
Selective grinding of the teeth during the setting up will
enable lateral and protrusive excursions without
interference from the natural teeth

112. 1. Applegate O.C.: Essentials of removable partial denture prosthesis. 1st ed. Philadelphia (PA): W. B. Saunders Co. 2000.
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3. Davenport, J.C. and Pollard, A.: Aspects of partial denture design; University of Birmingham .U.K. 2005.
4. Davenport, J.C., Basker, R.M., Heath, J.R. and Ralph, J.P.: A colour Atlas of Removable Partial Dentures. Wolfe Medical Publications Ltd. 2005.
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2001
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10-14,2001.
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19.Kaddah, A. F.: OCCLUSION IN PROSTHODONTICS, Varieties, Aberrations & Management. Dar Eletehad. First Co. First ed. Cairo Egypt. 98/7071, 1998.
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