3. Definition
Pontic GPT : An
artificial tooth on a
fixed dental
prosthesis that
replaces a missing
natural tooth,
restores its function,
and usually fills the
space previously
occupied by the
clinical crown
4. Definition
Acc to Tylman –pontic is the
suspended member of a fixed
partial denture. it replaces the lost
natural tooth, restores function
,and occupies the space of the
missing tooth.
5. Ideal requirements of pontics
Smooth surfaced and convex in all
directions
Easily cleansable
Pinpoint pressure free contact on the
ridge
No irritation to the gingival tissues
6. Ideal requirement of pontics
Facilitate plaque control
Emergence profile
Strength and longevity
Be esthetic
7. Ideal requirements of pontics
Restore function
No abutment overloading
Color stable
13. Differences in the plaque-retaining capacities
of.samples of a Type III gold, gold for
veneering with porcelain, a vacuum-fired
bonded porcelain Veneer, and an acrylic resin.
After 48 hours in vivo, the Ceramco metal
and Type III gold specimens accumulated
significantly more dark stains than acrylic
ones
Wise. M et al and Dykema .R, The plaque-retaining capacity of four dental
materials,J Proshtet 1975;33:178
14. Occlusal forces
Reduce buccolingual width – 30%
to lessen occlusal forces
12% increase in chewing efficiency
Pontics with normal occlusal widths
– in the occlusal third area
16. It can be seen that the maximum tensile stress
at the solder joint, mesial to the second molar and
above the gingiva, was reduced from2,400
p.s.i, in the conventional pontic to 1,200 p.s.i, in
the sanitary pontic and finally to 720 p.s.i, in the
modified sanitary pontic.
For the solder joint distal to the second
premolar, also above till gingiva, the reductions
were in the order of 1,920 (C.P.)to 960 (S.P.) to
720 p.s.i. (M.S.P.).
Hood, J. A. Stress and deflection of three different pontic designs. J Prosthet
Dent 33:54-59, 1975
31. Classification
1. Depending on shape of surface
contacting the ridge(Tylmann)
Sanitary
Modified sanitary
Spheroidal
Saddle
Ridge lap
Modified ridgelap
Ovate
32. 2.According to Rosenstiel depending
on mucosal contact
A. mucosal contact
ridge lap
modified ridge lap
ovate
conical
B. No mucosal contact
sanitary(hygenic)
modified sanitary
33. 3.According to the form(Johnston)
Sanitary or Hygenic
Anatomic type
4.Based on materials used
Metal
Metal and porcelain
Metal and resin
41. Modified ovate pontic
Contact more labially than ovate pontic
Easier to clean
No need of surgical augmentation
Push the labial gingival margin away to
floss
Liu.S,J Esthet Restor Dent 16:273-283, 2004
42. Residual ridge contour
To determine the frequency and the
nature of tissue reactions of
underlying residual ridge mucosa to
specific pontic designs, and
To compare the frequency and the
nature of tissue reactions of residual
ridge mucosa to various materials
used in pontic construction.
Stein.R.S , Pontic residual ridge relationship, J Proshtet Dent 1966;16: 251-285
43.
44. Metal Ceramic pontics
Uniform veneer of porcelain- 1.2 mm
Metal surface – smooth and free of pits
Round angles
Occlusal centric contacts –
1.5 mm away from junction
56. Metal ceramic pontics
Requirements
Adequate bulk of
metal
Uniform
thickness of
porcelain
Continuous strip
of metal on
lingual surface
57. Scalloped or trestle design
Connector is diminished in
faciolingual dimension – Indication
Bulk or rigidity in connector areas
Tissue contact – modified ridge lap
58. Metal ceramic pontics
To produce continuous contour and
uniform thickness of porcelain –
fabricate wax pattern to full contour
and cut back
Fabricate the copings – No 7 wax
spatula
Blue inlay wax stick – edentulous
area
62. Available pontic systems
Advantages Disadvantages Indications Contraindications
Metal Esthetics Difficult if Most Long span with
ceramic Biocompatible abutment not situations high stress
metal ceramic
All metal Strength Non esthetic Mandibular Esthetics
Straightforward molars,
procedure under high
bite force
Fibre Conservative Limited to short Esthetics Long span
reinforced with inlays spans
all resin Esthetics
Facings Rarely used Rarely used Rarely used Rarely used
63. Review of literature
Kumbulolu.O et al, A Different Pontic Design for Fiber-Reinforced Composite
Bridgeworks: A Clinical Report, Eur J Dent. 2007 January; 1(1): 50–53.
67. References
Wise. M et al and Dykema .R, The
plaque-retaining capacity of four dental
materials,J Proshtet 1975;33:178
Liu.S ,Use of a modified ovate pontic in
areas of ridge defects: A report of 2
cases, J Esthet Restor Dent 16:273-
283, 2004
68. References
Kumbulolu.O et al, A Different Pontic
Design for Fiber-Reinforced Composite
Bridgeworks: A Clinical Report, Eur J
Dent. 2007 January; 1(1): 50–53.
Kim.T.H.Yet al, Simulated tissue using
unique pontic design, J Prosthet Dent
2009;102:205-210