Implant denture restoration of missing teeth has become the best restorative option in the vast majority of cases and is the higher level of treatment in oral therapy. Many patients with missing teeth often ask about the longevity of dental implants when choosing dental implant treatment, and this is a concern for our implantologists. Dental implants are several times more expensive than other traditional restorations, so what are the factors related to their longevity? Only responsible doctors who have undergone professional training and have treated a large number of patients can provide patients with high dental implant technology. The second factor is the patient’s factor. If the patient has no contraindications to implant surgery, has sufficient bone in the missing tooth area, or can receive bone augmentation surgery to provide sufficient bone for implantation, can maintain good oral hygiene during the use of dental implants, and has good compliance, the patient can cooperate well with the doctor’s treatment and have regular follow-ups, then the life of the dental implant can be comparable to the life of a real tooth, or even longer than a real tooth. The life expectancy of dental implants is comparable to that of real teeth, or even longer than that of real teeth. Lastly, the condition of the medical unit where the patient visits is also a key factor. The hardware facilities and management of large medical units are more reliable, such as dental CT is widely used in implantology, while small medical units do not have CT equipment and equipment used for complex implant surgery. In simple terms, dental implants can theoretically have a similar life span as real teeth if the patient’s condition meets the needs of the implant treatment and if the patient is in good general health, but the doctor cannot guarantee this because the patient’s physical condition may change and the use of dental implants in the oral cavity and later oral maintenance are beyond the doctor’s control.