1-Introductin to clinical Removable Partial Denture.ppt
- 2. Definitions and Terminology RPD: RPD: Is a prosthesis that replaces Is a prosthesis that replaces some of teeth in partially dentate some of teeth in partially dentate arch, and can be removed from the arch, and can be removed from the mouth and replaced. mouth and replaced. Abutment ; Abutment ; Is the tooth ,a portion Is the tooth ,a portion of tooth that service for support of tooth that service for support and retain the prosthesis and retain the prosthesis
- 3. Definitions: Saddles Saddles: : The part of a partial denture which replaces the edentulous space (missing teeth) and carries the artificial teeth. Bounded saddles have teeth either end; Free End saddles have not distal abutment tooth. Support: Support: The ability of a denture to resist tissue wards movement. Retention (or Direct Retention): Retention (or Direct Retention): The ability of a denture to resist movement away from the supporting tissues, i.e. away from the teeth or mucosa. Indirect Retention: Indirect Retention: The ability of a denture to resist rotational or ‘tipping’ forces.
- 4. introduction introduction - -Why replace missing teeth? Why replace missing teeth? Aethetics Aethetics Function Function Mastication Mastication Speech Speech Preservation of what remains (De Van) Preservation of what remains (De Van) Prevent movement of remaining teeth& opposing teeth Prevent movement of remaining teeth& opposing teeth Over eruption Over eruption Tilting Tilting Mesial Drift Mesial Drift Prevent excessive wear on remaining teeth Prevent excessive wear on remaining teeth
- 6. Advantages:- Advantages:- Can replace many teeth Can replace many teeth Use with free end saddles Use with free end saddles Can replace hard and soft tissues defects Can replace hard and soft tissues defects Cost Cost Quickly & Simply made Quickly & Simply made Easy for modification and addition Easy for modification and addition Disadvantages:- Disadvantages:- Limited loading potential Limited loading potential Increased bone resorption Increased bone resorption Increased Plaque Increased Plaque Poor clasping & support tooth overload ⇒ Poor clasping & support tooth overload ⇒
- 7. e e Which edentulous areas should you restore? Which edentulous areas should you restore? Restore only :- Restore only :- Those edentulous areas which the patient wants Those edentulous areas which the patient wants restored for esthetics or function restored for esthetics or function Which edentulous areas should you not Which edentulous areas should you not restore? restore? Avoid restoring very small edentulous areas Avoid restoring very small edentulous areas
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- 9. What makes a successful RPD? RPD need four things:- 1- 1- strong: strong: it does not wear, break, and it does not wear, break, and distort. distort. 2- 2- retentive: retentive: so that it remains in position so that it remains in position in the patient s mouth during use. in the patient s mouth during use. 3- 3- esthetic: esthetic: to satisfy the patient s to satisfy the patient s expectations expectations 4- 4- pain-free: pain-free: it does not cause discomfort. it does not cause discomfort.
- 10. Indications of RPD Indications of RPD To replace more than 2 teeth posteriorly or 4 To replace more than 2 teeth posteriorly or 4 anteriorly, canine and 2 adjacent teeth. anteriorly, canine and 2 adjacent teeth. As a temporary replacement for missing teeth in a As a temporary replacement for missing teeth in a child. child. To replace missing teeth for patients who do not want To replace missing teeth for patients who do not want a fixed bridge or implants (cost, not to cut the teeth ). a fixed bridge or implants (cost, not to cut the teeth ). No distal abutment No distal abutment Multiple edentulous areas Multiple edentulous areas Short clinical crown Short clinical crown Sever tissue loss on edentulous space Sever tissue loss on edentulous space Immediate teeth replacement Immediate teeth replacement
- 11. Contraindications of RPD A lack of suitable teeth in the arch to A lack of suitable teeth in the arch to support, stabilize, and retain the support, stabilize, and retain the removable prosthesis. removable prosthesis. Rampant caries or severe periodontal Rampant caries or severe periodontal conditions that threaten the remaining conditions that threaten the remaining teeth in the arch. teeth in the arch. A lack of patient acceptance for esthetic A lack of patient acceptance for esthetic reasons. reasons. Chronic poor oral hygiene. Chronic poor oral hygiene.
- 12. Components of a Partial Denture Framework The cast metal skeleton that provides support The cast metal skeleton that provides support for the remaining components of the prosthesis for the remaining components of the prosthesis. . Connectors Join various parts of the partial together Join various parts of the partial together • Major connector Major connector • Minor connector Minor connector
- 13. Retainer Known as a Known as a clasp clasp, it supports and , it supports and provides stability to the partial denture provides stability to the partial denture by partially circling an abutment tooth. by partially circling an abutment tooth. Artificial teeth Constructed from either acrylic or Constructed from either acrylic or porcelain. porcelain. Components of a Partial Denture- Denture- cont cont’ ’d d
- 14. Saddle Saddle Replaces the lost of Replaces the lost of the alveolar tissues the alveolar tissues and carries art and carries arti ificial ficial teeth (obligatory teeth (obligatory function) function)
- 16. REMOVABLE PARTIAL DENTURE CLASSIFICATION - KENNEDY CLASSIFICATION SYSTEM - CLASS I - Bilateral Posterior Edentulous Areas CLASS II - Unilateral Posterior Edentulous Area CLASS III - Unilateral or Bilateral Edentulous Area(s) Bounded by Remaining Tooth/Teeth CLASS IV - Single Edentulous Area Anterior to Remaining Teeth and Crossing the Midline
- 23. Rules Rules
- 24. Rule 1: Rule 1: Classification Classification should follow should follow rather than rather than precede extraction precede extraction Applegate's Rules for Applegate's Rules for the Kennedy the Kennedy Classification Classification
- 25. Rule 2: Rule 2: If 3rd molar is missing & If 3rd molar is missing & not to be replaced, it is not not to be replaced, it is not considered in the classification considered in the classification Applegate's Rules for the Kennedy Classification
- 26. Rule 3: Rule 3: If the 3rd molar is If the 3rd molar is present and to be used present and to be used as an abutment, it is as an abutment, it is considered in the considered in the classification classification Applegate's Rules for the Kennedy Classification
- 27. Rule 4: Rule 4: If the second If the second molar is missing and molar is missing and not to be replaced, it is not to be replaced, it is not considered in the not considered in the classification classification Applegate's Rules for the Kennedy Classification
- 28. Rule 5: Rule 5: The most posterior The most posterior edentulous area edentulous area determines the determines the classification classification Applegate's Rules for the Kennedy Classification
- 29. Rule 6: Rule 6: Edentulous areas other Edentulous areas other than those determining than those determining classification are called classification are called modification spaces modification spaces Applegate's Rules for the Kennedy Classification
- 30. Rule 7: Rule 7: The extent of the The extent of the modification is not modification is not considered, only the number considered, only the number Applegate's Rules for the Kennedy Classification
- 31. Rule 8: Rule 8: There is no modification There is no modification space in Class IV space in Class IV Applegate's Rules for the Kennedy Classification
- 32. Maxillary Major Connectors Maxillary Major Connectors Palatal Strap Palatal Strap Anterior Posterior (A-P) Palatal Strap Anterior Posterior (A-P) Palatal Strap Anterior Posterior (A-P) Palatal Bar Anterior Posterior (A-P) Palatal Bar Palatal Plate Palatal Plate Palatal Bar Palatal Bar U-Shaped (Horseshoe) Palatal U-Shaped (Horseshoe) Palatal Connector Connector
- 39. Mandibular Major Connectors Mandibular Major Connectors Lingual Bar Lingual Bar Lingual Plate Lingual Plate Double Lingual Bar (Kennedy Double Lingual Bar (Kennedy Bar) Bar) Labial Bar Labial Bar Sublingual bar Sublingual bar
- 40. Mandibular Major Connectors Mandibular Major Connectors
Editor's Notes
- #7: Major connector type:co-cr(definitive), plastic (interim)