Removable partial denture

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Text of Removable partial denture

  • 1.PRESENTED BY SMIJAL

2. It should permit immediate visualization of the typeof partially edentulous arch being considered. It should permit immediate differentiation betweenthe tooth borne and tooth tissue supported RPD It should be universally acceptable 3. Tooth borne Mucosa borne Tooth and mucosa borne 4. World wide acceptable classification Devised by Edward Kennedy in 1923 When use in conjunction with a supportclassification, it helps to give a clear classificationunderstanding about the type of denture underconsideration during a discussion on partialdentures. Kennedy classification is based on the relationshipof the saddles to the natural teeth. 5. 1. The most posterior edentulous area determines the class.2. The size of the modification is not important.3. If a third molar is missing and not to be replaced it is not considered in determining the class. 6. Kennedys classification has four main groupswith modifications except for class IVClass I: Bilateral free endedentulous spaces posteriorto the natural teeth.Class II: Unilateral freeend edentulous spaceposterior to the natural teeth. 7. Class III: Abounded unilateraledentulous space havingnatural teeth at each end.Class IV: Abounded edentulous space anterior to the natural teeth. 8. Examples of modifications:An additional edentulous area in Class Iwould be designated as Class I modification 1If two additional edentulous areas arepresent it could be designate as Class Imodification 2A unilateral saddle with one additionaledentulous area is Class II modification 1 9. A unilateral bounded edentulous area with threeadditional edentulous areas is class III modification3 10. Allows visualization of partially edentulousarch Differentiates between tooth supported andtooth tissue supported Type of design can be decided Is universally accepted Aids in discussing identifying and planningthe design 11. Easy to apply the system to any situation Widely used system Formed the basis for two other systems as ApllgateKennedy and Swensons system 12. CUMMERS CLASSIFICATION (1921) CHARLES. W. BAILYN (1928) NEUROHRS CLASSIFICATION FRIEDMANS SYSTEM OSBORNE and LAMMIE 13. First classification to be recognised by the dental profession He classified partial dentures than edentulous spaces Four types1. Diagonal: 2 retainers diagonally opposite another2. Diametric: 2 retainers diametrically opposite one another.3. Unilateral: 2 or more direct retainers on same side.4. Multilateral: 3 direct retainers on either side. 14. He emphasized the importance of support forpartial dentures. A- Anterior restorations where there weresaddle areas anterior to the bicuspids. P- Posterior restorations where there weresaddle areas posterior to the canines. 15. Class I: Bounded saddle (Tooth supported). Class II: Free end saddle (Mucosa supported). 16. Class III: Bounded saddle(More than 3 tooth missing).Example: If all posterior teeth from canines tillmolars are missing with lateral incisors then theclassification is AI P III. 17. Class I: Variation I:a. Posterior missing, Anterior all teeth present.b. Posterior missing, some anterior teeth missing.Variation IIa. Anterior missing, All posteriors present.b. Anterior missing, some posteriors missing. 18. Class II: Division I has variation 1 and 2. Division II has variation 1 and 2 This classification is tooth tissue bearing. Class III is edentulous state. 19. A- Anterior space. B- Bound posterior space. C-Cantilever situation or a posterior free endsaddle. 20. Class I: Mucosa borne. Class II: Tooth borne Class III: Combination of mucosa borne andtissue borne. 21. RULE 1: classification should follow ratherthan precede any extractions of teeth hatmight alter the original classification. RULE 2: If a third molar is missing and not tobe replaced it is not considered in theclassification RULE 3: If a third molar is present and is tobe used as an abutment, it is considered inthe classification RULE 4:If a second molar is missing and is notto be replaced, it is not considered in theclassification 22. RULE 5: The classification is alwaysdetermined by the most posteriorlyedentulous area or areas RULE 6: Edentulous areas other than thosedetermining the classification are referred toas modifications and are designated by theirnumber. RULE 7:The extent of modification is notconsidered, only the number of additionaledentulous areas. RULE 8: There can be no modification areasin class IV arches (another edentulous arealying posterior to the single bilateral areacrossing the midline would determine theclassification.) 23. Applegate added two more classes to Kennedys existing classificationClass V: This is an edentulous area bounded anteriorlyand posteriorly by natural teeth, in which theanterior abutment is not suitable for support.Class VI: This is an edentulous situation in which theabutment tooth is capable of total support.(As inyoung patients)