Which of the following statements is true regarding secondary caries?

Secondary caries, also known as recurrent caries, frequently develop at the margins of dental restorations, particularly when those margins are tight. This phenomenon occurs because tight margins can create an environment where plaque accumulation is more likely and, consequently, the risk of demineralization in the adjacent tooth structure increases. Additionally, if the seal at the margin is not perfect, it may allow bacteria and acid-producing organisms to penetrate and thrive in this area, further promoting the development of caries.

In contrast, other options suggest that secondary caries are less likely to occur under certain conditions, such as with wider gaps or good marginal sealing. However, research consistently shows that compromised margins (even if they appear tight) can lead to higher incidences of secondary caries, underscoring the importance of meticulous restoration placement and maintenance to prevent these carious lesions from developing.