Cariology and Prevention 2 Practice Test

The main idea is the extent of untreated tooth decay among older adults, which reflects unmet dental care needs in aging populations. About one in five elderly individuals have untreated decay, roughly 20%, a level that recognizes ongoing barriers to access and treatment while not implying an almost universal burden. This proportion can be influenced by factors common in later life—medication-induced dry mouth, gum recession exposing root surfaces, limited mobility or transportation, and cost or availability of dental services—making a sizable but not overwhelming minority remain untreated. The other options would suggest a higher burden (around one third, one half) or a slightly higher share (one quarter) than is typically indicated, so one in five is the best-fitting choice.