75 combined RPD. Bars, locks, hinge attachments

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Last updated 3:32 PM on 7/17/26
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5 Terms

1
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what is interlock

is a device connecting a fixed unit or a removable dental prosthesis to another fixed unit.

2
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what is hinge attachment

W type: used mainly for bridge restorations

• T-U type: used mainly for single crowns

3
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components of bar type precision attachment

  • bar elemenet

  • rider

4
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• For different bar designs various patterns with different cross-sections are usable:

o Parallel bar

o Snap bar

o Resilient snap bar

o Dolder bar

5
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describe dolder bar

Has an oval section

  • 3 possible movements:

o vertical translation

o Sagittal rotation

o frontal rotation

  • Modifications for Dolder bar are two types:

o precision type Dolder: has a metal transverse and a rider

o semi precision type Dolder: the rider is made of plastic and is changeable