Dentition defect
Conditions
Interventions
Experimental group:Based on the physiological mobility of teeth, the occlusal registration and occlusal gap of adjacent teeth were optimized by reverse engineering software, and the occlusal gap of th
Control group:Conventional digital design of restorations using the database method
Sponsors
Peking University School and Hospital of Stomatology
Eligibility
Sex/Gender
All
Age
20 Years to 70 Years
Inclusion criteria
Inclusion criteria: 1: Not less than 20 years old and not more than 70 years old 2: The maxillary or mandibular second premolar or first molar is missing, and the implant single crown restoration is proposed 3: The adjacent teeth and the occlusal teeth of the implant are natural teeth, and the crown shape is basically intact, and there is no obvious abnormality in the axial direction and position of the crown 4: The restoration material is selected for full zirconia 5: Periodontal health or well-established systematic periodontal treatment 6: stable occlusion without occlusal interference or early contact 7: Patient has signed informed consent 8: Local or systemic disease without any contraindication to implant surgery
Exclusion criteria
Exclusion criteria: 1: Signs and symptoms of muscular, skeletal and joint diseases of the oral and maxillary system 2: Restricted mouth opening 3: There are malocclusions such as locking, opening, counter-blade occlusion, and reverse occlusion in the posterior teeth on the side where the implant is locate 4: Obvious abnormalities in the position of the adjacent teeth and the occlusal teeth of the implant, such as twisting, tilting or shifting the teeth 5: temporomandibular joint disease; 6) presence of oral side functions 6: Presence of oral parafunction 7: Pregnant and lactating women 8: Smoking> 10 cigarettes/day 9: Taking steroids or bisphosphonates 10: The patient has a physical disability or mental illness that affects the care of oral hygiene 11: History of chemotherapy within 5 years prior to surgery 12: history of radiotherapy in the head and neck region 13: There are circumstances that affect the completion of the study or interfere with the results of the research analysis, such as non-cooperation
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Grinding time;occlusal clearance value;Amount of grinding on the occlusal surface of the restoration; | — |
Secondary
| Measure | Time frame |
|---|---|
| Evaluation score of restoration bite paper;Subjective patient satisfaction;Adjacent contact; | — |
Countries
China
Contacts
Public ContactDing Qian
Peking University School and Hospital of Stomatology
Outcome results
None listed