Dr Balendra pratap singhAssistant ProfessorDepartment of Prosthodontics

Need for Classification Requirements of an acceptable method of

classification. Various types of Classification. Critical evaluation Summary Conclusion References

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.

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

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

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

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

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.

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.

Applegate 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

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

1. Class 2 mod. 2 2. class 2 mod. 1

3. Class 3 mod. 1 4. class 3 mod. 2

1. 6 types 2. 4 types 3. 2 types 4. 3 types

1. Class 4 2. class 3 mod. 1

3. Class 4 mod. 1 4. class 3 mod. 2

1. Class 1 mod 1 2. class 2 mod. 2

3. Class 1 mod. 2 4. class 2 mod. 1

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

1. Class 2 mod 2 2. class 3 mod 2

3. Class 4 mod 3 4. class 1 mod. 2

1. Class 4 mod 2 2. class 3 mod 2

3. Class 4 mod 1 4. class 2 mod. 2

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