edentulous
Conditions
Interventions
(Straumann Variobase for crown AS) AS group :The implant surgery was in the maxillary anterior region (maxillary central incisors, lateral incisors, and canine teeth), and single crown restoration wit
(Nobel Procera ASC) ASC group: The implant surgery was in the maxillary anterior region (maxillary central incisors, lateral incisors, and canine teeth), and single crown restoration with the angulate
Sponsors
Affiliated Stomatological Hospital of Zhejiang University School of Medicine
Eligibility
Sex/Gender
All
Age
18 Years to No maximum
Inclusion criteria
Inclusion criteria: (1) More than 18 years old (2) The implant surgery was in the maxillary anterior region (maxillary central incisors, lateral incisors, and canine teeth), and single crown restoration with the angulated screw channel abutment (ASC or AS) was applicated; (3) The restoration time should be more than 1 year; (4) Patients were willing to complete the clinical and radiograph tests, and were capable of understanding and giving informed consent
Exclusion criteria
Exclusion criteria: (1) Uncontrolled systematic diseases, such as diabetes mellitus (fasting blood-glucose >7.2 mmol/L, glycosylated hemoglobin >7%); (2) Uncontrolled periodontitis (full-mouth plaque score > 20%, full-mouth bleeding score > 25%, residual pocket depth > 5 mm); (3) Heavy smokers (>10 cigarettes/day); (4) Pregnancy or immediate plans for pregnancy; (5) Patients with immune dysfunction, including HIV infected patients; (6) History of intravenous use of bisphosphonates (treatment for malignancy), or history of radiotherapy and chemotherapy in head and neck region (7) Severe buxism (8) Poor oral hygiene or weak compliance (9) Having benign or malignant tumors in the implantation area (10) Metabolic bone disease such as severe osteoporosis
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Bleeding on probing%;Biotype; | — |
Secondary
| Measure | Time frame |
|---|---|
| Marginal bone level;Buccal bone thickness;Pink aesthetic score/ white aesthetic score;patients' satisfaction;Probing depth;Plaque index;Keratinized mucosa width;emergence angle;Mechanical complication rate; | — |
Countries
China
Contacts
Public ContactHE Fuming
The Affiliated Stomatology Hospital, Zhejiang University School of Medicine
Outcome results
None listed