Question 259 (part 2) · LDEK · Cast partial dentures
One of the features of exemplary introductory path is for the retentive arms to have the so-called directional fixating function. It means that:
- A. the end of the true part of the retentive arm should be directed towards the denture base, which according to anticipation is most vulnerable to being detached from the surface, especially in partial unbounded edentulous losses or vast interdental in anterior section.
- B. the end of the true part of the retentive arm should be directed towards the residual teeth.
- C. the end of the true part of the retentive arm should be directed either towards the denture base or the residual teeth, which is related to the anatomy of tooth, on which the arm was designed.
- D. it does not matter, towards which side is the retentive arm directed, as denture retention depends on depth on which the position of said arm was designed on retentive surface.
- E. none of the above-mentioned information does not describe the function of retentive arm.
Hint
Directional fixation means the retentive arm tip acts like a hook against the part of the denture most likely to lift off.
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