Classification of removable partial

denture

Classification of removable partial

denture

Dr Balendra Pratap singhBDS, MDS, MAMS, FISDR, FPFA, FAAMP, ICMR-IFAssistant professorDepartment of Prosthodontics

CONTENTSCONTENTS

Need for Classification

Requirements of an acceptable method of classification.

Various types of Classification.

Critical evaluation

Summary

Conclusion

References

NEED FOR CLASSIFICATIONNEED 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.

REQUIREMENTS OF AN ACCEPTABLE METHOD OF CLASSIFICATION: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

Various Types of ClassificationVarious Types of Classification

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

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

Kennedy’s classification: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.

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

Recognize the Classification?

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

Recognize the classification?

Modifications

They were indicated according to the number of

such areas not by their extent, like Class III mod 2

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.

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.

Applegate’s classificationApplegate’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.

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.

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.

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.

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.

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.

ReferencesReferencesApplegate O.C. : Essentials of Removable partial denture prosthesis. 1st edition, 1965.Avant W.E. : The universal classification for removable partial denture situations. J. Prosthet. Dent. 1966; 16: 533-540.Davenport J.C., Basker R.M., Heath J.R. and Ralph J.P. : A color atlas of removable partial dentures. 1st edition, 1988.David M. Watt and A. Roy MacGregor: Designing partial dentures. Eugene Costa: A simplified system for identifying partially edentulous dental arches. JPD, 1974, 639-645.Friedman J.: The ABC classification of partial denture segments. JPD, 1953, 517-524.

Kratochvil F.J. : Partial removable prosthodontics. 1st edition,

1988.

McGivney G.P., Carr A.B.: McCracken’s Removable partial

prosthodontics. 10th edition, 2001.

Miller E.L. : System for classifying the partially edentulous arch.

J. Prosthet. Dent. 1970; 24: 25-40.

Skinner C.N. : A classification of removable partial denture

based upon the principles of anatomy and physiology. J.

Prosthet. Dent. 1959; 9: 240-45.

Stewart K.L., Rudd K.D. and Kuebker W.A. : Clinical

Removable partial prosthodontics. 2nd edition, 2001.

Thomas J. McGarry: Classification system for partial

edentulism, Journal of Prosthodontics, 2002 Sep;11(3):181-93.

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 23. Class 1 mod. 1 4 class 2 mod 2

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 23. Class 1 mod. 1 4. class 2 mod

2

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 23. Class 1 mod. 1 4. class 2 mod

2

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

Q5. According to Kennedy, all partially edentulous arches are classified into

1. 6 types

2. 4 types

3. 2 types

4. 3 types

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

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

Q8. If you need some adjustment in this RPD, which type of RPD you tell to Lab?

1. Class 1 2. class 33. Class 2 4. class 1 mod. 1

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

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

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