What is essential to prevent recurrent caries and gingival irritation in restorations?

The marginal fit of a restoration is crucial in preventing recurrent caries and gingival irritation because it directly impacts how well the restoration integrates with the surrounding tooth structure and gums. A well-fitted restoration minimizes gaps and crevices where bacteria can accumulate, which is a primary factor contributing to the formation of recurrent caries. A poor marginal fit can lead to food traps and plaque buildup, increasing the risk of decay at the margins of the restoration.

Additionally, a good marginal fit helps to maintain periodontal health by preventing irritation to the gingival tissue, which can occur if the edges of the restoration are rough or improperly aligned. When the margins are sealed and smooth, it creates a healthy environment that discourages plaque accumulation and gingival inflammation.

While proper flossing techniques, regular dental check-ups, and fluoride treatments are all important aspects of oral health, they do not address the immediate concern of how the restoration interfaces with the tooth and gums as directly as marginal fit does. Therefore, ensuring that restorations have an excellent marginal fit is foundational in maintaining both caries-free and healthy gingival tissues.