What can contribute to the failure of restorative treatments like crowns and bridges?

The failure of restorative treatments such as crowns and bridges can be significantly influenced by periodontal diseases. These conditions involve inflammation and infection of the supporting structures of the teeth, including the gums and bone, which can lead to tissue destruction. When periodontal disease is present, it compromises the stability and health of the teeth that are supporting the crowns or bridges. As a result, these restorations may not have a solid foundation, ultimately leading to their failure.

In contrast to periodontal diseases, factors such as low saliva production, incorrect tooth alignment, and allergies to dental materials, while they can certainly affect oral health and potentially the longevity of dental work, do not directly engage the structural integrity of the surrounding tissue in the way that periodontal disease does. Salivary production influences caries and oral health but does not inherently undermine the support needed for a crown or bridge. Incorrect tooth alignment may affect the occlusion but does not directly align with periodontal support failures. Allergies can lead to discomfort or adverse reactions to materials, yet they don't typically result in structural failures of the restorative work itself based on the surrounding periodontal health.