Microleakage: The Silent Threat in Dental Restorations
What is microleakage and how does it impact tooth restoration?
Microleakage is the passage of bacteria or substances between a tooth and its restoration material, often leading to secondary caries (decay) following tooth restoration. How does this phenomenon affect the longevity and success of dental restorations?
Understanding Microleakage in Dental Restorations
Microleakage refers to the microscopic passage of bacteria, fluids, molecules, or ions between a cavity wall and the restorative material applied to it. This issue is typically observed in dental procedures involving fillings. The microleakage at the tooth-restoration interface might cause various issues, the most problematic being secondary caries (decay), which is often observed following tooth restoration.
When the restorative material does not perfectly adhere to the tooth structure, tiny gaps might form where bacteria can enter and cause further dental decay. This fundamental problem is called secondary caries and is a significant factor in restorative dentistry's longevity and success. It is also a common reason for the replacement of dental restorations.
The level of microleakage, and therefore the risk of secondary caries, greatly depends on the restoration material and technique used. Achieving an intimate contact between the tooth structure and the restorative material is crucial in preventing microleakage and subsequent secondary caries.
Dentists employ various techniques to minimize microleakage, such as proper preparation of the tooth cavity, the use of adhesive bonding agents, and selecting the appropriate restorative materials. By understanding the implications of microleakage, dental professionals can improve the outcomes of restorative procedures and enhance the longevity of dental restorations.