rpd direct retainers 2nd yr
Post on 07-May-2015
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Direct Retainers
Retention
Intracoronal attachments
Extracoronal attachments
Direct Retainers (Clasp retainers)
Requirements of Direct Retainers
Requirements of Direct Retainers
Factors affecting The Magnitude of Retention
Magnitude of Retention
Direct Retainer Selection
Direct Retainers for Tooth-Borne RPD’s
Occlusally approaching clasps
1-Aker’s clasp (Circlet clasp)
5- Multiple Clasp
7- Half & Half clasp
10- Back action clasp
Tooth-Borne Direct Retainers
Stress-Releasing Direct Retainers
Non-Stress-Releasing Direct Retainers
Infrabulge (Bar) Clasps
Infrabulge (Bar) Clasps
Contraindications
1 - RPI Clasp
Bar Clasp with Mesial Rest alternative
2- RPA Clasp
3- Combination Clasp
Clasps with splinting action
Thank you
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