none
Conditions
Interventions
Experimental Group: Porcine-derived Absorbable Collagen Matrix Membrane :The experimental group used porcine-derived absorbable collagen matrix membrane as the ridge preservation material.
Control Group: Autologous Free Gingival Graft Group :The control group used autologous free gingival graft as the ridge preservation material.
Sponsors
Department of Stomatology, General Hospital of Northern Theater Command, People's Liberation Army
Eligibility
Sex/Gender
All
Age
18 Years to 60 Years
Inclusion criteria
Inclusion criteria: Inclusion criteria: (1) Patients aged 18 to 60 years, regardless of gender; (2) Non-restorable teeth in the maxillary anterior and premolar regions; (3) Post-extraction buccal/palatal bone plate loss <50%; (4) Insufficient residual bone volume for immediate implant placement; (5) Adjacent teeth with good periodontal condition and no attachment loss.
Exclusion criteria
Exclusion criteria: Exclusion criteria: (1) Refusal to sign informed consent; (2) Patients with acute apical periodontitis or acute periodontitis that may interfere with treatment outcomes; (3) Significant local or systemic infections; (4) Severe cardiovascular diseases; (5) Severe allergic predisposition; (6) Poorly controlled diabetes mellitus (e.g., HbA1c >7%); (7) Uncontrolled systemic diseases (such as hypertension); (8) Heavy smoking (>10 cigarettes per day); (9) Patients receiving bisphosphonates via intramuscular or intravenous administration; (10) History of radiotherapy or chemotherapy; (11) Current participation in other clinical trials or having completed a clinical trial within the past six weeks; (12) Mental incompetence or inability to understand study requirements; (13) Pregnancy, lactation, or plans for pregnancy; (14) Poor compliance or unwillingness to attend follow-up visits; (15) Patients deemed unsuitable by investigators for participation.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| The change in bone width at 3 mm from the alveolar crest.; | — |
Secondary
| Measure | Time frame |
|---|---|
| The change in bone width at 1 mm and 5mm from the alveolar crest.;Change in width of keratinized gingiva; Wound healing rate;Visual Analogue Scale score;the time of the surgery;The change in thickness at 2 mm below the lowest point of the gingival margin;Alveolar bone width at 1 mm, 3 mm, and 5 mm below the alveolar crest.; | — |
Countries
China
Contacts
Public ContactYulong Tang
Department of Stomatology, General Hospital of Northern Theater Command, People's Liberation Army of China
Outcome results
None listed