Dentures are extremely common. When teeth are damaged, people often use dentures to compensate for the defect. There are various types of dentures, and individuals can choose the most suitable option based on their specific circumstances. Today, we will introduce nickel-chromium porcelain-fused-to-metal crowns, one of the more advanced types of porcelain crowns, though they also carry significant risks.
Nickel-chromium alloy porcelain-fused-to-metal crowns are widely used due to their low cost, with over 50% of patients opting for this type. Clinical studies indicate that some individuals are allergic to nickel, which can cause inflammation of the skin and mucous membranes. As for whether nickel-chromium alloy crowns can cause kidney disease, it is difficult to say definitively. However, excessive trace elements in the body can potentially lead to kidney problems.Heavy metals like silver and mercury, when present in excess, directly impact kidney function.
In stark contrast, some experts strongly advocate "eliminating the use of nickel-chromium porcelain-fused-to-metal crowns" due to their high toxicity and potential to elevate nickel levels in the body. Trace element analysis revealed nickel levels in patients' urine exceeding standards by 13 times. Additionally, patients exhibited metal precipitation in their mouths and gum erosion.
Nickel-chromium alloy porcelain-fused-to-metal crowns are rarely used in Western countries due to their poor aesthetics. Furthermore, if the porcelain layer detaches, heavy metal ions can leach out, causing toxicity and potentially carcinogenic effects. Consequently, all-ceramic crowns made of zirconium dioxide are now widely adopted globally. These offer superior biocompatibility, causing no irritation or allergic reactions to the gums, and outperform various metal alloys including gold.
While nickel-chromium porcelain crowns can correct imperfections, improper use or inadequate maintenance can harm oral health. Patients should select high-quality crowns and diligently care for them post-installation.