Classification rpd

Theory

1. Classification of
removable partial
denture

2. CONTENTS
Need for Classification
Requirements of an acceptable method of classification.
Various types of Classification.
Critical evaluation
Summary
Conclusion

3. NEED FOR CLASSIFICATION
Ease of communication between dentist and laboratory
personal.
Facilitates case history recording and immediate
visualization of the edentulous arches
Formulate a good treatment plan
Formulate basic design principles which might be applied
to similar situations.
Anticipate the difficulties commonly to occur for that
particular design.

4. REQUIREMENTS OF AN ACCEPTABLE
METHOD OF CLASSIFICATION:
Allow visualization of the type of partially
edentulous arch
Permit immediate differentiation between the
tooth-supported and the tooth and tissue
supported removable partial denture
Universally accepted
A guide to the type of design to be used

5. Various Types of Classification
Cummer’s Classification. 1920
Kennedy’s Classification. 1925
Bailyn’s Classification. 1928
Neurohr’s Classification. 1939
Mauk’s Classification. 1941
Wild’s Classification. 1949
Godfrey’s Classification. 1951
Friedman’s Classification. 1953
Beckett’s Classification. 1953
Craddock’s Classification. 1954

6. Austin-Lidge Classification. 1957
Skinners Classification. 1957
Wilsons Classification.1960
Watt’s Classification. 1958
Applegate Classification. 1960
Avant’s Classification. 1960
Swenson’s Classification. 1963
Fiset
,
s Classification. 1973
Costa’s Classification. 1974
Osborne Classification. 1979
ACP Classification. 2002

7. Kennedy’s classification:
In 1925 Dr. Edward Kennedy of New York..
This system is based on the relationship of the
edentulous spaces to the abutment teeth. It is
a positional or anatomical classification.

8. Class I : Bilateral edentulous
areas located posterior to the
remaining natural teeth. Highest
incidence in mandible
Class II : A unilateral edentulous
area located posterior to the
remaining natural teeth

9. Recognize the Classification?

10. Class III : A unilateral
edentulous area bounded
anteriorly and posteriorly by
remaining teeth
Class IV : An edentulous area
located anterior to the
remaining natural teeth. A
single but bilateral (crossing
the midline) edentulous area

11. Recognize the classification?

12. Modifications
They were indicated according to the number of
such areas not by their extent, like Class III mod 2

13. Advantages:
It permits immediate visualization of the partially
edentulous arches.
It permits a logical approach to the problems of
design.
It gives a definite treatment plan.
Differentiates between bounded saddle and free
end saddle.
Simplicity.

14. Disadvantages:
Did not explain the length of the edentulous span or
number of missing teeth- only provide number of
modification spaces.
Not enough consideration about the condition of teeth and
the remaining supporting structures.
No distinction between modification spaces which occur in
the anterior segment to those of posterior segment.

15. Applegate’s classification
Oliver C. Applegate 1960, provide a modification
of Kennedy’s system.
This system is based on the number, location and
condition of abutment teeth or manner of
achieving support.

16. Class V : Teeth bound the
edentulous area anteriorly and
posteriorly but anterior bounding
tooth is not suitable as
abutment. (not strong enough
for rest, direct retainer) (as the
lateral incisor). It is basically a
class III situation where anterior
abutment cannot be used for
any support.

17. Class VI : An edentulous situation
in which the boundary teeth are
capable of total support of the
required prosthesis. This situation
hardly requires any tissue support.
The abutments are capable of
providing total support.
Additional edentulous areas are
designated by letter A and P.
A : Anterior segment of the
arch.
P : Posterior segment of the
arch is bounded by remaining
teeth.

18. Applegate’s rules:
Rule One: Classification should follow
rather than precede extractions that
might alter the original classification.
Rule Two: If the third molar is missing
and not to be replaced, it is not
considered in the classification.
Rule Three: If the third molar is
present and is to be used as an
abutment, it is considered in the
classification.
Rule Four: If the second molar is
missing and is not be replaced, it is
not considered in the classification.

19. Rule Five: The most posterior
edentulous area or areas
always determine the
classification.
Rule Six: Edentulous areas
other than those, which
determine the classification,
are referred to as modification
spaces and are designated by
their number.

20. Rule Seven: The extent of the
modification is not considered,
only the number of additional
edentulous areas are considered.
Rule Eight: There can be no
modification areas in class IV.
Because any additional
edentulous space will definitely
be posterior to it and will
determine the classification.

21. Q1. If tooth number 47 in below mentioned cast is part of
Removable partial denture then this condition of partial
edentulous state is classified as?
1.Class 1 2. class 2
3. Class 1 mod. 1 4 class 2 mod 2

22. Q2. If tooth number 48 in below mentioned cast is
NOT part of Removable partial denture then this
condition of partial edentulous state is classified
as?
1.Class 1 2. class 2
3. Class 1 mod. 1 4. class 2 mod 2

23. Q3. If tooth number 18 in below mentioned cast is part
of Removable partial denture then this condition of
partial edentulous state is classified as?
1.Class 1 2. class 2
3. Class 1 mod. 1 4. class 2 mod 2

24. Q4. If tooth number 28 in below mentioned cast is
part of Removable partial denture then this condition
of partial edentulous state is classified as?
1.Class 2 mod. 2 2. class 2 mod. 1
3. Class 3 mod. 1 4. class 3 mod. 2

25. Q5. According to Kennedy, all partially
edentulous arches are classified into
1. 6 types
2. 4 types
3. 2 types
4. 3 types

26. Q6. Keeping in mind that all teeth are healthy, how
do classify this?
1.Class 4 2. class 3 mod. 1
3. Class 4 mod. 1 4. class 3 mod. 2

27. Q7. This RPD is classified as
1.Class 1 mod 1 2. class 2 mod. 2
3. Class 1 mod. 2 4. class 2 mod. 1

28. Q8. If you need some adjustment in this RPD,
which type of RPD you tell to Lab?
1.Class 1 2. class 3
3. Class 2 4. class 1 mod. 1

29. Q9. You have found this RPD in clinic, how do
you describe it?
1.Class 2 mod 2 2. class 3 mod 2
3. Class 4 mod 3 4. class 1 mod. 2

30. Q10. This RPD is classified as
1.Class 4 mod 2 2. class 3 mod 2
3. Class 4 mod 1 4. class 2 mod.
2

31. THANK YOU