The main purpose of blood tests before implant surgery is to exclude contraindications to surgery, assess the patient’s general health, and also to provide special treatment for patients with special infections to avoid cross-infection between patients and reduce the risk of implantation. The routine blood tests include: (a) routine blood tests 1. white blood cells (WBC): WBC and its classification determine the presence of infection or inflammation, the normal value is 4000-10000/mm3. Patients with low WBC should ask the patient about the recent use of leukocyte inhibiting drugs or past blood history, low WBC, easy infection after implant surgery, resulting in implant failure. A higher than normal WBC indicates the presence of recent infection or inflammation, which should be controlled first and implanted at a later date. 2, red blood cells and hemoglobin: lower than normal values, suggesting anemia and other blood diseases, should be treated first, and implantation at a later date. The hemoglobin value before implantation should be above 10mg/dL (normal value 13.5-18mg/dL for men and 12-16mg/dL for women). 3. Platelet and coagulation examination: normal value of platelet is (108-273)x109/L for men and (148-257)x109/L for women. general platelet >100)x109/L, implantation can be performed. Platelets below or above normal require treatment before implantation. Thrombocytopenia is seen in primary thrombocytopenic purpura. Some medical disorders such as collagen disorders, hypersplenism, uremia, and bone marrow fibrosis due to tumor bone marrow metastasis may cause secondary thrombocytopenia. Some hematopoietic disorders such as leukemia, aplastic anemia, hemolytic anemia, myelodysplastic syndrome, etc. can be accompanied by thrombocytopenia. Platelets are also often reduced in cases of excessive platelet consumption, such as disseminated intravascular coagulation and thrombotic thrombocytopenic purpura, sepsis, and cornual tuberculosis. Significant increase in platelets is mainly seen in primary thrombocytosis, true erythrocytosis, chronic granulocytic leukemia, and tumor bone marrow metastases (when there are osteolytic changes). After splenectomy, platelets can also show a transient increase. In addition, platelets can be reactively and mildly increased after fractures, bleeding and surgery. Patients need to be informed that after the examination and treatment, the suitability of implantation surgery will be confirmed according to the systemic condition. 4. Coagulation test examination: including bleeding time, partial thromboplastin time, and prothrombin time. If the coagulation lab test is abnormal, the patient needs to be asked if he/she is taking anticoagulants or suffering from coagulation disorders and treated accordingly. If anticoagulants are taken, ask the internist if the medication can be stopped 1 week before and 3 days after the implantation. (B) Biochemical tests 1. transaminases (GOT, GPT): liver disease 2. glucose/glycated hemoglobin: diagnostic of diabetes 3. lactate dehydrogenase (LDH): hemolytic problems, liver disease, myocardial infarction 4. creatinine: renal function 5. bilirubin: liver disease 6. alkaline phosphatase (ALP): diagnostic of liver disease, bone disease (Paget’s disease, metastatic cancer, fracture, thyroid function resistance) (3) Infectious disease screening The purpose is to provide special treatment for patients with specific infections and to avoid cross-infection between patients. 1.Hepatitis B screening 2.Hepatitis C screening 3.Syphilis screening 4.AIDS screening