The failure rate of dental implants is generally low. According to the American Association of Oral and Maxillofacial Surgeons (AAOMS), the success rate for dental implant placement is typically up to 98%. However, certain factors can increase the risk of implant failure, such as smoking, untreated gum disease, and some medical conditions. It's important to note that even with proper care and maintenance, there is still a small risk of implant failure due to factors such as implant fracture, infection, or insufficient bone support. However, with advances in implant technology and techniques, the success rates of dental implants continue to improve, and most patients enjoy successful outcomes with their implants.