Which clasps are gingivally located for better retention?

The correct answer highlights that a clasp arm being gingivally located is crucial for enhancing the retention of removable dental prosthetics, such as partial dentures. When the clasp arm is positioned closer to the gum line, it can engage more effectively with the contours of the remaining teeth, providing better resistance against dislodgment during normal oral functions like chewing and speaking. This positioning allows for improved stability and retention, as it utilizes the natural shape of the teeth and soft tissue in the oral cavity.

A key aspect to note is that a clasp arm located occlusally, or parallel to the tooth, may not provide the same degree of retention as a gingivally located arm because it may not adequately engage the retentive areas of the tooth or rely effectively on the anatomical features designed for retention. The use of materials with a high modulus of elasticity may contribute to strength but does not directly address the positioning and retention advantages offered by a gingivally located clasp arm.