Under which circumstance is the altered cast technique indicated?

The altered cast technique is specifically indicated in situations where there is an instability of the prosthesis, which can often be observed when saddles rock under occlusal loading. This technique is particularly useful for patients with partial edentulous situations, where a portion of the dentition is missing, and it allows for more precise recording of the supporting tissues in the altered cast.

When there is rocking of the saddle during functional loading, this may indicate an inadequate fit or retention of the denture, leading to potential discomfort and compromised function for the patient. The altered cast technique helps to correct this by allowing the dental professional to take an impression of the edentulous ridge while the prosthesis is in place, capturing the anatomy more accurately in its functional position. This can then be utilized to improve the fit of the prosthesis, ensuring better stability and comfort during use.

It is important to note that although significant edentulous space can be a consideration for various prosthetic techniques, it does not specifically warrant the altered cast technique unless the rocking of saddles under occlusal loading is present. The same applies to aesthetic improvements and discomfort with the existing prosthesis; while these factors may necessitate adjustments or other techniques, they are not the primary indication for utilizing