Dentition defect
Conditions
Interventions
Group A:Abutments of 1 mm transgingival height
Group B:Abutments of 2 mm transgingival height
Group C:Abutments of 3 mm transgingival height
Sponsors
Department of Oral Implantology, Hospital of Stomatology of Jilin University
Eligibility
Sex/Gender
All
Age
18 Years to No maximum
Inclusion criteria
Inclusion criteria: General inclusion criteria: 1. The patient voluntarily participates and signs the informed consent form; 2. Male or female aged >= 18 years; 3. American Society of Anesthesiologists (ASA) Grade I or Grade II; 4. Single crown or 1~3 unit combined crown planting repair is required; 5. Periodontal health or periodontitis has been treated and stabilized. Partial inclusion criteria: 1. At least 3 months after tooth extraction, the tooth extraction socket is completely healed; 2. Alveolar ridge width >= 7mm, distance from mandibular nerve >= 10mm, distance from maxillary sinus >= 8mm; 3. Mucosal thickness of implant repair site (initial mucosal thickness): 3~4mm; 4. The mandibular teeth are fixed prosthetic dentures or natural teeth, and the repair space is >= 6 mm.
Exclusion criteria
Exclusion criteria: 1. The patient is pregnant or lactating at any time during the study period; 2. The patient had uncontrollable endocrine, immune or metabolic changes during the study period; 3. Patients who need soft and hard tissue reconstruction technology; 4. Lack of initial implant stability or peak implant torque > 60 Ncm; 5. Poor oral hygiene and enthusiasm (plaque index > 20%), uncontrolled periodontal disease, or active infection or inflammation at the implant site; 6. Have any drug history that may affect the health of soft tissues (such as amlodipine, cyclosporine A, phenytoin sodium, etc.), drug history that may affect bone metabolism (such as bisphosphonate, etc.), or systemic diseases; 7. Full dose radiotherapy, local radiotherapy history of head or neck 8. Serious nocturnal molar, temporomandibular joint disorder and other related functional abnormalities or bad occlusion behavior or habits; 9. Smoking > 10 cigarettes/day; 10. Psychological or mental problems; 11. Alcoholism or drug abuse. 12. Participate in other studies if this protocol cannot be properly followed; 13. Other conditions that the researcher judged could not participate in the study.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| peri-implant marginal bone level(MBL); | — |
Secondary
| Measure | Time frame |
|---|---|
| width of keratinized mucosa(KMW);bleeding on probing(BOP);probing pocket depth(PPD);facial mucosal level(FML);papilla height(PH); | — |
Countries
China
Contacts
Public ContactLi Fu
Department of Oral Implantology, Hospital of Stomatology of Jilin University
Outcome results
None listed