The authors observed clinically applying intracoronal precision attachment, extracoronal precision attachment, telescopic stud attachment, bar attachments. And the classification, the advantages and disadvantages, the indications and
contraindications,
the selection of the precision attachments and the consideration for the design of the removable partial dentures with attachment were discussed.
An important factor to consider in selecting the free-end removable partial dentures with attachment is balance between the forces applied to the residual ridge and abutment teeth.
If the periodontium of the abutment teeth is healthly, providing good support for the teeth, and the residual ridge is strong, the distribution of support should be equally balanced, and if the teeth are weak periodontally and the residual ridge
is
poor, the distribution of support should still be equally balanced.
However, if the teeth are weak and the residual ridge is strong, the ridge should provide more support than the teeth and conversely, if the teeth are strong and the residual ridge is weak, then greater support should be supplied by the tteeth.
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