Surgical implants are medical devices placed inside the body to support or replace damaged biological structures. They can be made from various materials, including metals, ceramics, and polymers, and are used in procedures like joint replacements, dental work, and heart surgeries. These implants help restore function, improve quality of life, and promote healing. Common examples include hip implants, dental implants, and pacemakers. The choice of implant depends on the specific medical condition and the patient's needs, ensuring a tailored approach to treatment.