Australian Dental Council (ADC) Practice Test

The statement regarding overdentures that is not correct pertains to the retention and protection of retained roots. While it is true that overdentures can provide several advantages over conventional complete dentures, one commonly misunderstood aspect is that the retained roots are not fully shielded from caries and periodontal diseases just because they are covered by the overdenture. In fact, the surfaces of the retained roots can still be subjected to the same potential risk factors for dental caries and periodontal disease that non-retained teeth face, primarily due to plaque accumulation and inadequate oral hygiene.

Overdentures are designed to improve retention and stability compared to conventional complete dentures. The retained roots can enhance proprioception and can help to maintain alveolar bone integrity, leading to a reduction in bone resorption. However, it’s essential to recognize that the protection offered by the overdenture does not guarantee the health of the retained roots. Proper oral hygiene, regular dental check-ups, and monitoring of the retained roots are crucial in preventing diseases even when they are covered by an overdenture.