Factors Affecting Porcelain Crown Lifespan
1. Design Rationality
Poorly designed crowns may fracture under excessive force, leading to chipping, porcelain detachment, or loosening of the natural tooth, thereby shortening the crown's lifespan.
2. Maintenance during use
Porcelain can crack under stress exceeding its tolerance range. Avoid biting excessively hard foods like walnuts.
3. The dentist's skill
Many patients focus on the hospital or clinic's size, reputation, equipment quality, and the materials used for the crown, often only considering the type of crown they will receive. They pay less attention to the dentist's skill, which actually plays a decisive role in the lifespan of the crown.
4. Materials Used in Porcelain Crowns
Metals with poor biocompatibility can irritate surrounding tissues, leading to allergic reactions, corrosion, and metal ion leaching. This may cause gingivitis, periodontitis, dark lines along the gumline, and bad breath.
5. The fit of the fabricated porcelain crown
The tighter the fit between the crown and the natural tooth, the smaller the gap between them, the better it protects the natural tooth. A larger gap between the two, or poor-quality adhesive, can allow bacteria to enter the gap, causing corrosion of the natural tooth and forming cavities. If the natural tooth underneath decays, the porcelain crown will not last long either.This demonstrates how crucial a tight fit is to the longevity of porcelain crowns.