02 classification and indications of rpd
- 5. REMOVABLE PARTIAL DENTURES Dr. Amal Fathy Kaddah Professor of Prosthodontic, Faculty of Oral &Dental Medicine, Cairo University
- 6. INDICATIONS FOR REMOVABLE PARTIAL DENTURES 1- No abutment tooth posterior to edentulous space (Free end edentulous area)
- 7. 2- Long edentulous bounded span, too extensive for fixed restoration
- 8. 3- Periodontally weak teeth not3- Periodontally weak teeth not sufficiently sound to support fixed-sufficiently sound to support fixed- partial denture.partial denture.
- 10. Free end edentulous area Periodontally weak teeth
- 11. 4- With excessive loss of residual bone, the use of labial flange or need to restore lost tissues.
- 12. With excessive loss of residual bone, space is seen under the pontic.
- 14. 5- After recent extraction, usually done only to improve esthetics, or for patient satisfaction. 6- Need of bilateral bracing (cross arch stabilization) 7- Young age (less than 17 years).
- 15. Young age (less than 17 years) has a high pulp horn Young Old
- 16. 7- Enhancing esthetics in anterior region, by the use of translucent artificial teeth instead of dull fixed partial denture pontic. 8-Economic considerations, attitude and desire of the patient.
- 17. Enhancing esthetics in anterior region, by the use of translucent artificial teeth instead of dull fixed partial denture pontic
- 18. Contraindications of RPDs • Whenever fixed restorations can be successfully used. • When prognosis of remaining natural teeth is doubtful. • Poor oral hygiene & high caries susceptibility. • Lack of patient cooperation.
- 19. Why should any body laugh at what he himself does
- 20. Requirements of an Acceptable Classification: Classifications are important to facilitate communication between the dentist and the laboratory technician CLASSIFICATION OF PARTIALLY EDENTULOUS ARCHES 1- Permit immediate visualization of the type of partially edentulous arch 2- Permit immediate differentiation between bounded and free extension RPD. 3- It should be universally accepted
- 21. Unilateral RPD (Removable Bridge) Bilateral RPD I- Classification According to the Extent of the Removable Partial Denture: CLASSIFICATION OF PARTIALLY EDENTULOUS ARCHES
- 22. * long clinical crown of abutment tooth *buccal and lingual surfaces of the abutment tooth must be parallel to resist tipping forces *Retentive undercuts should be available on both the buccal and lingual surfaces of each abutment Unilateral RPD (Removable Bridge) CLASSIFICATION OF PARTIALLY EDENTULOUS ARCHES
- 24. Unilateral RPD (Removable Bridge) should be used with caution, as the chance of the denture becoming dislodged and aspirated is too great
- 25. Bilateral RPD: which restore missing teeth and extended on both sides of the dental arch
- 26. 1-Tooth and Tissue Supported RPD (Tooth and tissue borne) II- Classification According to theII- Classification According to the type of support of the R.P.D.:type of support of the R.P.D.: 2- Tooth Supported RPD (Tooth- borne) removable partial denture 3-Tissue Supported RPD (Tissue CLASSIFICATION OF PARTIALLY EDENTULOUS ARCHES
- 27. *Tissue Supported RPD Tooth and Tissue Supported RPD Tooth Supported RPD
- 28. Class I: Bilateral edentulous areas located posterior to the remaining natural teeth. III- Classification According to the most posterior edentulous span or spans Class II: Unilateral edentulous area located posterior to the remaining natural teeth. Class III: Unilateral edentulous area with natural teeth, both anterior and posterior to it Class IV: Single, bilateral edentulous area located anterior to the remaining natural teeth. CLASSIFICATION OF PARTIALLY EDENTULOUS ARCHES
- 29. Class I Class IVClass III Class II
- 30. • Additional edentulous areas are referred to as modification spaces and are designated by their number • The numeric sequence of the classification system is based on the frequency of occurrence of each class. Class I being the most common while class IV is the least common. Kennedy's classification was then modified by Applegate
- 31. Class I mod.1 Class II mod.3 Class III mod. 1 Class IV ????
- 32. Applegate's rules for applying Kennedy classification Rule1Classification should follow mouth preparations, since further extractions may alter the class
- 33. Rule1 If the left molar is extracted class III becomes class II X
- 34. Applegate's rules for applying Kennedy classification Rule2 If the third molar is missing and not to be replaced, it is not considered in the classification
- 35. Class ????????? The third molar is missing and not to be replaced.
- 36. Applegate's rules for applying Kennedy classification Rule3 If the third molar is present and to be used as an abutment, it is considered in the classification
- 37. ???? ???? Rule3
- 38. Applegate's rules for applying Kennedy classification Rule4 If the second molar is missing and not to be replaced, because the opposing second molar is also missing, it is not considered in the classification
- 39. Applegate's rules for applying Kennedy classification Rule5 The most posterior edentulous area (or areas) always determines the classification
- 40. Applegate's rules for applying Kennedy classification Rule 6 Additional edentulous areas other than those determining the class are referred to as modification spaces and are designated by their number
- 41. Applegate's rules for applying Kennedy classification Rule7 The extent of the modification is not considered, only the number of additional edentulous areas
- 42. Applegate's rules for applying Kennedy classification Rule 8 There can be no modification areas in class IV arches, because if there is a posterior edentulous area beside the anterior one, the former will determine the class and the anterior edentulous area will be a modification to the class
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- 51. Denture Base Artificial Teeth Supporting Rests Retainers Direct retainers Indirect Retainers Connectors: Major Connectors Minor Connectors The Component Parts of Removable Partial Dentures
- 52. 1 2 5 3 4 ? ?
- 53. Don't underestimate the power of a smile, a kind word, a listening ear, an honest compliment, or the smallest act of caring, all of which have the potential to turn a life around....