What happens when the elastic limit of a partial denture clasp is exceeded?

When the elastic limit of a partial denture clasp is exceeded, it can no longer return to its original shape. The elastic limit refers to the maximum extent to which a material can be deformed elastically (i.e., without permanent deformation) under stress. Once this limit has been surpassed, the material undergoes plastic deformation, meaning it retains some of its new shape instead of bouncing back to its original form after the stress is removed.

Understanding this concept is critical in dental applications, as it directly impacts the functionality and longevity of the clasps used in partial dentures. If a clasp does not return to its original form, it may not fit properly, could lead to discomfort, and ultimately might compromise the retention of the denture itself. Therefore, exceeding the elastic limit has practical implications for both the effectiveness and the lifespan of dental appliances.