Dentition defect
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: 1) Male or female patients aged 18 to 70 years; 2) Maxillary edentulous or maxillary terminal dentition; 3) The maxillary hard tissue defect conforms to Cawood & Howell classification IV-VI; 4) Normal mouth opening (>=40 mm); 5) Cheekbone width >=12mm; 6) Before implementing any research-related experimental procedures, the experimenter's resources sign an informed consent form.
Exclusion criteria
Exclusion criteria: 1. There is local inflammation in adjacent teeth, including uncontrolled periodontitis (periodontal probing depth> 4mm); 2. There are untreated acute and chronic apical periodontitis in adjacent teeth; 3. Oral mucosal lesions (such as lichen planus); 4. There are space-occupying lesions in adjacent teeth (including cysts, tumors, etc.); 5. System diseases that affect bone healing, wound healing and dental implant treatment (such as uncontrolled diabetes, fasting blood glucose is still >=8.8mmol/L under drug control); 6. Uncontrolled and stable severe hypertension; 7. Contraindications of conventional implant surgery and oral surgery; 8. Heart disease (heart function disease of grade II and above); 9. Patients with insufficiency or abnormal liver and kidney function; 10. Obese patients, body mass index BMI> 28 kg/m2; 11. Received full-dose radiotherapy, a history of local radiotherapy on the head or neck; 12. Patients who need long-term high-dose steroid therapy; 13. Patients who have been treated with drugs (such as bisphosphonates) that may affect or promote bone metabolism within the past 3 months; 14. In the first 4 weeks of starting the operation, continuous antibiotic treatment or chronic anti-inflammatory treatment (>=3 times a week); 15. Alcoholism or long-term drug abuse; 16. Patients with immune insufficiency; 17. Smoking/tobacco equivalent/chewing tobacco more than 10 pieces per day; 18. Physical or mental defects affect oral hygiene care; 19. Female patients who are pregnant or breastfeeding; 20. Patients who the researcher believes that they have poor compliance and cannot participate in the trial; 21. In the first 30 days of starting the operation (study day 0), the patient participated in the clinical trial of other drugs or devices.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Implant placement accuracy; | — |
Secondary
| Measure | Time frame |
|---|---|
| operation time;Patient satisfaction with surgery;Postoperative complications;Implant retention; | — |
Countries
China
Contacts
The Ninth People's Hospital Affiliated to Shanghai Jiaotong University School of Medicine