Tooth defect
Conditions
Interventions
Test Group 1:Pneumatic gingival discharge (PGR-S), gingival line discharge
Test group 2:Pneumatic gingival discharge (PGR-S), gingival line discharge
Sponsors
Peking University School and Hospital of Stomatology
Eligibility
Sex/Gender
All
Age
18 Years to 30 Years
Inclusion criteria
Inclusion criteria: Experiment 1: 1)Aged 18-30 years; 2)Categorized by gingival biotype: 15 cases of thin gingival biotype and 15 cases of thick gingival biotype; 3)No active oral disease treatment, normal occlusal relationship, complete dentition; 4)Absence of hard tissue pathologies in teeth #11, #26, #46, and mandibular dentition; 5)No bleeding on probing, probing depth =6 months prior to study. Experiment 2: 1)Maxillary anterior teeth with coronal defects restored using digitally fabricated all-ceramic single crowns; 2)Preparation margins placed subgingivally at 0.5 mm with a width of 0.5–1 mm; 3)No missing natural teeth in the entire dentition; 4)Patients of any gender, with normal mouth opening, permanent dentition, good periodontal health, and no systemic complications; 5)Stratified by gingival biotype: 15 cases with thin biotype and 15 cases with thick biotype.
Exclusion criteria
Exclusion criteria: Experiment 1: 1)Restricted mouth opening impeding intraoral scanning or conventional impression taking; 2)Presence of untreated periodontal disease; 3)Long-term use of corticosteroids/immunosuppressants/aspirin/anticoagulants/other systemic medications; 4)Pregnancy. Experiment 2: Restricted mouth opening; Edentulism;Non-permanent dentition;Poor periodontal health;Severe systemic diseases;Declined study participation
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Experiment 1 Gingival retraction measurement;Experiment 2 Gingival retraction measurement; | — |
Secondary
| Measure | Time frame |
|---|---|
| Experiment 1 Time;Experiment 1 Visual Rating Scale (VRS);Experiment 2 Time;Experiment 2 Visual Rating Scale (VRS); | — |
Countries
China
Contacts
Public ContactZhongning Liu
Peking University School and Hospital of Stomatology
Outcome results
None listed