The document discusses various classification systems for partially edentulous arches that have been proposed over time. It describes the primary classes and features of classification systems proposed by Swenson, Cummer, Kennedy, Bailyn, Neurohr, Mauk, Godfrey, Beckett, Friedman, Austin-Lidge, Skinner, and Applegate-Kennedy. The classification systems are based on factors like the number, position and length of edentulous spaces and number/position of remaining teeth. The Applegate-Kennedy system is highlighted as the most commonly used today for its simplicity.

1. CLASSIFICATION OF PARTIALLY EDENTULOUS ARCHES

6. Swenson’s class I partially Swenson’s class II partially edentulous condition edentulous condition Swenson’s class III partially edentulous condition Swenson’s class IV partially Swenson’s class V partially edentulous condition edentulous condition

9. Cummer's classification system

11. Class I maxillary arch Class II mandibular arch class III mandibular arch Class IV maxillary arch

13. Bailyn's System Class P I – Edentulous region posterior to the cuspid between two available abutments not more than three teeth distant from each other. Class P II – Edentulous bilateral regions posterior to the cuspids with one available abutment tooth for each denture base area. Class P III – edentulous region atleast three teeth posterior to the distal abutment. Class A III – edentulous space anterior to the first bicuspid and between two teeth, more than three teeth distant from each other.

14. Bailyn's System Class A I P II – Edentulous region anterior to the first bicuspid and between two available abutments less than three teeth distant from each other. Class P I P II – both edentulous regions posterior to the cuspids: only one tooth available for anchorage, the other two separated by a distance of at least three teeth. Class A I P III – has three edentulous spaces : One of these is anterior to the first bicuspid with two available anchor teeth separated by a distance of less than three teeth, another posterior to the cuspid with only one tooth for anchorage, third one posterior to the cuspid with two teeth available for abutments separated by less than three teeth

15. Bailyn's System Class P1 Class PII Class P III Class A III

16. Bailyn's System Class A I P II Class P I P II Class A I P III

18. Neurohr’s Class II division 1 Variation 1a partially edentulous Condition Neurohr’s Class II division 1 Variation 1a partially edentulous Condition Neurohr’s Class II division 1 Variation 1b partially edentulous Condition Neurohr’s Class II division 2 Variation 1a partially edentulous Condition

21. Mauk's System Class I Class II Class III Class IV Class V Class VI

24. Godfrey System Godfrey’s class A partially Godfrey’s class B partially edentulous condition edentulous condition Godfrey’s class C partially Godfrey’s class D partially edentulous condition edentulous condition

28. Friedman’s type A partially Friedman’s type B partially edentulous condition edentulous condition Friedman’s type C partially edentulous condition

31. Austin and Lidge class A2 Austin and Lidge class P2 Partially Edentulous condition Partially Edentulous condition Austin and Lidge class AB1 Austin and lidge class PB1 Partially Edentulous condition Partially Edentulous condition

33. Skinner’s class I partially Skinner’s class IV partially edentulous condition edentulous condition Skinner’s class II partially Skinner’s class V partially edentulous condition edentulous condition

35. Kennedy-Applegate’s class I Kennedy-Applegate’s class II partially edentulous condition partially edentulous condition Kennedy-Applegate’s class IV partially edentulous condition Kennedy-Applegate’s class V partially edentulous condition

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