Reality Check #7

8/3/2019 Reality Check #7

1/19


2/19

DESIGNING CLASS I RPDs

How does one design for the generally least favorablesituation you will findbilateral distal extension.

With movement that WILL occur around the fulcrum linewe must be careful of not damaging teeth that are contacted

by the framework forward of the fulcrum line.


3/19

What forces will be acting on the extensions during functionand what can you do to minimize movement as a result of these forces?


4/19

Toward the Tissue:-what happens.-how compensate?

Away from the Tissue:-what happens.-how compensate?


5/19

1. Where place rests?


6/19

1. Mesial occlusal on terminal abutments.2. Support M.C.3. Distribute stress = equal loads transferred to teeth.


7/19

Where are guide planes located?


8/19

What is the rule for their location?


9/19

What major connector should I use?

First ask your self why cant I use a ? for each arch.


10/19

FIRST CHOICE IS

Lingual Bar A-P Bar

Know the factors which enter into selection of M.C.!


11/19

In distal extension areas very very liQle choice/reason for usingsomething other than meshwork. Why?


12/19

Have to be able to reline due to changing alveolar bone contact.This will help to decrease what mentioned before?


13/19

What direct retainers can be used on terminal abutmentson distal extensions?


14/19

Circumferential Wrought Wire or I-bar.Why?

Remember we will always have some movement around thefulcrum line no maer what we do so with these clasp choices whatare we trying to do?


15/19

Where would you need reciprocation?


16/19

Opposite side of teeth with direct retainers.What can one use for reciprocation?


17/19

What is indirect retention and where is it located on these cases?


18/19

Mesiocclusal of #20 and #28 Lingual plating of anteriors.What is less than ideal with that?

Component forward of fulcrum line that resists movement of distal extension baseaway from the tissue.


19/19

Make sure everything is ultimately connected to the Major Connector if not already connected via another component..

Minor Connectors

Reality Check #7

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Transcript of Reality Check #7