Partial edentulous
Conditions
Interventions
Zirconia group :Zirconia implant single crown restoration
Lithium disilicate group:Lithium disilicate implant single crown
Sponsors
Department of Implantology, Peking University Stomatological Hospital
Eligibility
Sex/Gender
All
Age
20 Years to 60 Years
Inclusion criteria
Inclusion criteria: 1. A single non-free posterior tooth with the same name was missing on both sides, and the remaining dentition was intact; 2. The adjacent teeth and the opposite teeth were healthy and complete, without obvious inclination or overlength, and the curve of occlusal and the gap of missing teeth were normal; 3. The occlusion relationship is stable; 4. The position and overbite/overjet of the bilateral posterior teeth were normal, with no abnormal occlusion; 5. The occlusal surface of posterior teeth was basically complete, and the shape of the fossa and groove was normal; 6. The opening degree is normal (37-45mm); 7. The general condition is good.
Exclusion criteria
Exclusion criteria: 1. In addition to a single posterior tooth with the same name on both sides, there was one or more teeth missing; 2. The adjacent teeth were obviously tilted or the opposite (occlusal) teeth were obviously too long, and the curve of occlusal and the gap of missing teeth were abnormal; 3. The occlusal relationship is unstable, and the bimaxillary equimaxillary relationship is unstable; 4. There is an abnormal occlusion in the posterior area; 5. The occlusal surface is severely worn, and the shape of the groove on the occlusal surface is absent; 6. The opening mouth is difficult and can not satisfy the intraoral scanning; 7. Under orthodontic treatment; 8. There was a large range of metal restorations in the posterior teeth; 9. Absence of a single homonymic posterior tooth at both free ends; 10. Patients with periodontal disease have loose teeth in the mouth. ? Patients with unilateral mastication ? The antagonistic tooth is implant prostheses, crown prostheses, or with large filling materials on the occlusal surface.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| wear of antagonistic tooth;Occlusal changes of implant prostheses; | — |
Secondary
| Measure | Time frame |
|---|---|
| Bleeding index of implant prosthesis;Plaque index of implant restoration;Mechanical complications of implant prostheses;Patient evaluation of the color of the prosthesis;Bone resorption at implant margins; | — |
Countries
China
Contacts
Public ContactPing Di
Outcome results
None listed