In which situations is the "step-back" technique utilized in major connectors?

The step-back technique is utilized in major connectors specifically when there is excessive undercut in the mandibular anterior teeth. This technique allows for the design of the major connector to accommodate the anatomical constraints presented by the undercut areas. By stepping back or reducing the width of the connector at points where undercuts occur, the clinician can craft a more functional and comfortable denture that avoids interference with the surrounding soft tissues and underlying structures. This approach ensures that the partial denture remains stable and secure, even in the presence of anatomical challenges in the anterior region.

In contrast, cases of diastema or severe periodontal disease do not primarily necessitate the step-back technique, as these situations might require different design considerations that focus more on other aspects of stabilization and retention. While improved denture stability is a beneficial outcome of various design techniques, it is not the primary reason for employing the step-back technique.