complete edentulism
Conditions
Interventions
experimental group:one-piece fixed prosthesis supported by six implants.
control group:segmented fixed prosthesis supported by six implants.
Sponsors
Shanghai 9th People's Hospital affiliated to Shanghai Jiaotong University School of Medicine
Eligibility
Sex/Gender
All
Age
20 Years to 80 Years
Inclusion criteria
Inclusion criteria: 1) Aged >= 18 years and in good health; 2) The lower teeth can not be retained or there are no teeth in the upper jaw which need implant-supported fixed restoration; 3) Six implants could be placed without bone augmentation; 4) The distance from the posterior mandible nerver was >= 2mm; 5) Complete dentition (natural teeth or removable dentures) of the opposite jaw; 6) There was no systemic disease and contraindication of local implantation; 7) Enough inter-arch space for one-piece implant-supported fixed restoration 8) Volunteer to participate in the study and sign the informed consent, and can abide by the study plan.
Exclusion criteria
Exclusion criteria: 1) Uncontrolled diabetes or other systemic diseases; 2) Uncontrolled periodontal disease; 3) Severe smokers ( >= 10 / day); 4) not enough primary stability; 5) Implants or bone grafts were used in the proposed sites.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| marginal bone loss; | — |
Secondary
| Measure | Time frame |
|---|---|
| implant survival;peri-implant soft tissue condition;mechanical complications;patient-reported outcomes; | — |
Countries
China
Contacts
Public ContactHongchang Lai
Shanghai 9th People's Hospital affiliated to Shanghai Jiaotong University School of Medicine
Outcome results
None listed