You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is A 40 year old male patient complains of decayed tooth. Patient gives history of class I cavity preparation and restoration with conventional amalgam with 26. Intra-oral examination reveals proximal caries with 26. The copper content of the restoration done in this patient is?​ and explain in detail?
Low-copper amalgam alloys contain 2%​ to 5% copper. The earliest successful amalgams were​ made by combining filings of such alloys with mercury.​ A typical modern low-copper amalgam alloy may contain 69.4% Ag, 26.2% Sn, 3.6% Cu, and 0.8% Zn. Amalgams made from such low-copper alloy filings are often referred to as conventional amalgams. High-​copper amalgam alloys contain 12% to 30% copper, and​ because of their higher copper content, they display significantly better corrosion resistance than low-copper​ amalgams.
Reference: Sturdevant’s Art and Science of Operative Dentistry, Mosby, 4th Edition, Page No: 149