defect of dentition
Conditions
Interventions
Pure titanium:Pure titanium
Titanium base 1mm:Titanium base 1mm
Titanium base 2mm:Titanium base 2mm
Titanium base 3mm:Titanium base 3mm
Sponsors
Peking University School and Hospital of Stomatology
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1. Patients with missing upper/mandibular molars planned for implant restoration; 2. Patients with good bone condition and no need for bone graft surgery ; 3. The width of the buccal-lingual keratinized mucosa is greater than 8mm; 4. The initial stability of the implant is greater than/equal to 30Ncm and does not need to be implanted for healing; 5. The thickness of the mucosa in the operation area is greater than/equal to 3mm;(6)Missing teeth for at least 6 months; 7. ASA I~II classification of American Society of Anesthesiologists; 8. Aged over 18 years; 9. Good oral hygiene and good compliance.
Exclusion criteria
Exclusion criteria: 1. Patients with uncontrolled periodontitis in their remaining teeth; 2. Smoking patients; 3. Patients with uncontrolled infection in the operation area and the whole body; 4. Patients with systemic diseases: Patients with uncontrolled diabetes, cardiovascular diseases, immune system diseases, coagulation disorders and other blood diseases and severe osteoporosis; 5. Patients with long-term medication, especially those with history of steroids, antiepileptic drugs and bisphosphonates; 6. Patients with special infection: HIV, hepatitis B, syphilis infection, etc.; 7. Bruxism patients; 8. The subjects who did not agree to participate in the experiment did not sign the informed consent.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Mucosal tissue section around implant;Implant clinical examination; | — |
Secondary
| Measure | Time frame |
|---|---|
| The thickness of the mucosa (the crest).; | — |
Countries
China
Contacts
Public ContactJingwen Yang
Peking University stomatological hospital
Outcome results
None listed