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RPD – The System of Design
Transcript of RPD – The System of Design
rests on and covers alveolar ridge and includes artificial teeth and gumwork
Search on "Davenport JC" and "partial dentures" to find articles.
Dental Update is available on line at the University of Birmingham elibrary.
Print subscription is £36 for students
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There are many other articles
just search on partial dentures
System of Design
Professor Damien Walmsley
Decision making process for Removable Partial Dentures
Stages of Partial Denture Design
Design instructions to Laboratory
(after surveying mounted and articulated casts)
Consider the following
design of occlusal surface
material for fitting surface
saddle/abutment tooth junction
Vertical masticatory force resisted by
Quality of support
type of support available may
vary and assessment of its quality is
made during design procedures
root area of the abutment teeth
extent of the saddles
expected force on the saddles
Kanno T, Carlsson GE.
A review of the shortened dental arch concept focusing on the work
by the Kayser/Nijmegen group. J Oral Rehabil. 2006;33:850-62
Does it work?
The shortened dental arch concept was accepted by a great majority of dentists but not widely practised
The shortened dental arch concept deserves to be included in all treatment planning for partially edentulous patients
Shortened Dental Arch
Types of Retention
Factors affecting clasp choice
Position of undercut
Flexibility of clasp
metal arm which retains, or stabilises,
a denture by contacting a tooth
Lower Arch Designs
Continuous or dental bar
Upper arch designs
Mid palatal bar
Support for Indirect retainer
Omit the last tooth
Reduce area of occlusal table
Use narrow posterior teeth
Acrylic Dentures are mucosa borne
Please read dental update article by Professor Walmsley on "Acrylic Dentures"
Go to http://findit.bham.ac.uk/
Search for Dental Update
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Front page of Dental Update will appear
Search for "Acrylic Dentures"
too short to
be flexibleshould be
Flexible at short length
held in acrylic
Gold or wrought stainless steel
vs Cast Cobalt Chrome
Suitable for wrought
NOT Cast clasps
Now cast clasps can be used as well
Notice the assistance of the opposing reciprocating arm
on upward displacement
Choice depends on many factors including