American Board of Dental Examiners (ADEX) Dental Hygiene Licensing Examination 2025 – 400 Free Practice Questions to Pass the Exam

To effectively prevent torquing in class I and II removable partial dentures, ensuring that guide planes end below the height of contour is crucial. Guide planes serve as stabilizing surfaces that help provide direction and support for the removable partial denture during function and when being inserted or removed.

When guide planes are positioned properly, they enhance the fit of the denture and reduce the potential for lateral movement, which could lead to undesirable forces acting on the abutment teeth. By placing the ends of the guide planes below the height of contour, you are ensuring that the removable partial denture is more intimately guided by these planes as it is engaged in the mouth. This deliberate positioning assists in distributing forces more evenly and minimizes the risk of torquing, which can compromise the stability and longevity of both the dentures and the supporting teeth.

The other options, while addressing aspects of denture design and functionality, do not specifically target the prevention of torquing in the same direct manner as the placement of guide planes below the height of contour does. Hence, focusing on the guide planes is essential for maintaining the integrity and effectiveness of removable partial dentures.