With the continuous development of medical aesthetic technology, dental implants have become more and more popular among the majority of beauty lovers. The following is an introduction to the contraindications of dental implants. The dental experts reminded that there are many contraindications to dental implant surgery even though it is small! What are the contraindications to dental implants? Chronic wasting diseases, such as tuberculosis, diabetes, blood diseases; hypertension, heart diseases, cerebrovascular diseases; mental illness, psychological instability; drug addiction, alcoholism, severe mental weakness, poor physical fitness; the above-mentioned diseases are contraindications for implant surgery. However, there are relative contraindications and absolute contraindications. For patients with reversible diseases, dental implant surgery and restoration can still be performed after they have been controlled or cured through treatment. Although dental implants are minor surgery, they are contraindicated in certain local conditions, such as various inflammatory diseases of soft and hard tissues in the oral cavity; various benign and malignant tumors in the oral cavity that have not been cured; abnormal occlusion and misalignment; and limited mouth opening. malformations, and restricted mouth opening. If the bone in the dental cavity is severely resorbed and shrunken, and the implant may penetrate into the maxillary sinus in the upper jaw or the mandibular canal in the lower jaw, the implant is not suitable for direct implantation, but can be implanted at the same time or postponed under the condition of bone implantation to improve the bone volume. In addition, it is also contraindicated for those who have serious grinding habits and poor oral hygiene. The following are absolute contraindications to dental implants: 1. Severe renal dysfunction Because in any case, damage to the renal unit can lead to the destruction of bone, due to the loss of urinary calcium and the interruption of vitamin D synthesis due to the impairment of renal function. Loss of calcium ion recycling can rapidly lead to metabolic osteoporosis and plasma endotoxin retention with a great risk of infection and poor bone regeneration and fusion. 2. Recent myocardial infarction These patients often do not reach a stable state until two years after the first treatment. This state must remain stable for at least 3-6 months before surgery can be considered, as surgical stress can trigger vasoconstriction and heart rate acceleration to induce arrhythmias. 3, after heart valve surgery Patients with heart valves or those who have undergone heart valve surgery are at great risk for heart valve longevity and surgical safety when attacked by bacteria. The oral cavity is thought to be the main gateway for such bacterial infections, especially after oral surgery, and can often cause temporary bacteremia, while the rougher endocardium after heart valve surgery is conducive to bacterial growth, which can lead to severe subacute endocarditis. Therefore, implantation surgery can be performed only after the patient’s state is stable for 15 to 18 months after heart surgery. 4, uncontrolled endocrine system diseases Such as refractory diabetes and severe hormone deficiency can lead to tissue degeneration, wound healing difficulties, infection and bone metabolism disorders in patients. 5. Metabolic bone disease or other metabolic or systemic abnormalities of bone Any type of bone metabolism disorder can cause failure of implant osseointegration. 6.Tumor patients who really undergo radiotherapy or chemotherapy Because in tumor treatment, high doses of chemotherapy can produce severe thrombocytopenia and interfere with the osteogenic cycle. 7.Drug, alcohol or tobacco addiction Large drug addicts have low self-esteem, poor disease resistance, a tendency to infection, nutritional disorders, psychological disorders, poor hygiene and tracking difficulties. 8.The need for regular steroids This condition is often accompanied by impaired wound healing, disorders of calcium and phosphorus metabolism and bone marrow dysplasia. 9. Other (1) Long-term immunosuppressive therapy (2) Connective tissue diseases (3) Hematological diseases (e.g. leukemia, hemophilia) (4) Local malignant tumors and metastases (foci) (5) Severe psychological disorders and psychiatric disorders Through the above introduction, I believe you should have a comprehensive understanding of the contraindications and indications of dental implants, and if you want to know more about dental implants, it is best to go to a large hospital If you want to know more about dental implants, it is best to consult a professional dental specialist.