- ICH GCP
- Registr klinických studií v USA
- Klinická studie NCT07605286
Soft Tissue Augmentation Around Dental Implants
The Use of Collagen Matrices and Connective Tissue Grafts for Soft Tissue Augmentation Around Dental Implants
The goal of this study is to determine which method better increases the volume of soft tissues (gums) around dental implants: using the patient's own tissues or applying collagen matrices. The study also evaluates the safety of these methods and their impact on smile aesthetics.
The main questions it aims to answer:
Which method provides greater and more stable increase in gum thickness around the implant? Does the choice of material affect gum color (how well it matches adjacent areas)? What features of healing and cellular tissue structure are observed when using different materials?
Researchers will compare:
Autogenous connective tissue grafts (CTG) - the patient's own connective tissue grafts harvested from the palate or maxillary tuberosity Xenogeneic collagen matrices (XCM) - bioresorbable materials of animal origin (Fibro-Gide® and FibroMatrix®) that do not require harvesting the patient's own tissue
Participants will:
Undergo a surgical procedure to increase soft tissue volume in the area of implant placement (using one of four methods assigned randomly)
Attend clinic visits for follow-up examinations and assessments:
- Before surgery
- 3 months after surgery
- 6 months after surgery
Undergo additional examinations:
- 3D intraoral scanning to assess changes in tissue volume
- Cone-beam computed tomography (CBCT) to measure gum thickness
- Polarized-light photography to evaluate gum color
- Collection of a small tissue sample (biopsy) for laboratory analysis of tissue structure and cellular composition
Přehled studie
Postavení
Typ studie
Zápis (Aktuální)
Fáze
- Nelze použít
Kontakty a umístění
Studijní místa
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Moscow, Rusko, 119021
- Central Research Institute of Dental and Maxillofacial Surgery
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Kritéria účasti
Kritéria způsobilosti
Věk způsobilý ke studiu
- Dospělý
- Starší dospělý
Přijímá zdravé dobrovolníky
Popis
Inclusion Criteria:
- Age between 21 and 75 years
- Requirement for single dental implant placement in the mandibular molar region (replacing no more than one tooth)
- Need for soft tissue augmentation to achieve peri-implant mucosal thickness ≥2 mm
- Signed voluntary informed consent for treatment and research participation
- Ability and willingness to attend all scheduled follow-up examinations for 12 months post-surgery
- Adequate oral hygiene and commitment to maintain it throughout the study period
Exclusion Criteria:
- Presence of systemic diseases in a decompensated stage (e.g., uncontrolled diabetes, severe cardiovascular disease)
- Current or prior use of immunosuppressants, bisphosphonates, or high-dose corticosteroids
- History of cancer, radiation therapy, or chemotherapy within 5 years prior to enrollment
- Need for concurrent bone grafting or immediate implant placement following tooth extraction
- Active periodontal disease or untreated oral infections at the time of surgery
- Heavy smoking (>10 cigarettes/day) or inability to abstain from smoking during the healing period
- Pregnancy or lactation
- Known allergy to collagen, porcine/bovine products, or materials used in the study (sutures, anesthetics)
- Participation in another clinical trial within 30 days prior to enrollment
- Refusal to participate in any stage of the study or inability to comply with study procedures
- Psychological or social conditions that, in the investigator's judgment, may compromise protocol adherence or data reliability
Studijní plán
Jak je studie koncipována?
Detaily designu
- Primární účel: Léčba
- Přidělení: Randomizované
- Intervenční model: Paralelní přiřazení
- Maskování: Singl
Zbraně a zásahy
Skupina účastníků / Arm |
Intervence / Léčba |
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Experimentální: Palate CTG
Subepithelial connective tissue graft harvested from the hard palate, placed at the implant site to augment soft tissue thickness and volume
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Autogenous subepithelial connective tissue graft harvested from the hard palate (premolar-molar region) using a horizontal incision 2-3 mm apical to the gingival margin.
Epithelium removed microscopically.
Graft secured within a soft-tissue "envelope" at the recipient implant site using U-shaped sutures.
Donor site closed with compression sutures.
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Experimentální: Tuberosity CTG
Subepithelial connective tissue graft harvested from the maxillary tuberosity, placed at the implant site to augment soft tissue thickness and volume
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Autogenous subepithelial connective tissue graft harvested from the maxillary tuberosity using parallel incisions 2 mm distal to the last molar.
Epithelial strip removed.
Graft placed and secured at the implant site using U-shaped suturing technique.
Donor site closed with interrupted sutures.
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Experimentální: Fibro-Gide
Xenogeneic collagen matrix (porcine-derived, types I/III collagen), trimmed and placed between the flap and bone to augment soft tissue
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Porcine-derived xenogeneic collagen matrix (types I/III), 6 mm thick, gamma-sterilized.
Trimmed to fit recipient site, placed between flap and bone without suturing to the flap, fully covered by soft tissues during closure.
No donor site required.
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Experimentální: FibroMatrix
Xenogeneic collagen matrix (bovine pericardium-derived, types I/III collagen), trimmed and placed between the flap and bone to augment soft tissue
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Bovine pericardium-derived xenogeneic collagen matrix (types I/III), 3-4 mm thick, freeze-dried, bilayer structure.
Trimmed to fit recipient site, placed between flap and bone without suturing to the flap, fully covered by soft tissues during closure.
No donor site required.
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Co je měření studie?
Primární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
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Change in peri-implant soft tissue thickness from baseline to 6 months post-augmentation
Časové okno: Baseline (pre-surgery), 3 months post-surgery, and 6 months post-surgery
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The primary outcome is the mean change in vertical soft tissue thickness at the implant site, measured at three equidistant points (crest, 1 mm apical, 2 mm apical) along the vestibular aspect of the alveolar ridge.
Thickness is assessed using three complementary methods: (1) mucosal puncture with a calibrated spreader and silicone stopper under local anesthesia; (2) superimposition of cone-beam computed tomography (CBCT) scans; and (3) comparison of digital 3D intraoral scans (STL files) using GOM Inspect software.
Measurements are averaged across the three points per site.
The primary analysis compares mean thickness gain between the four intervention groups (palate CTG, tuberosity CTG, Fibro-Gide, FibroMatrix) at 6 months.
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Baseline (pre-surgery), 3 months post-surgery, and 6 months post-surgery
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Spolupracovníci a vyšetřovatelé
Sponzor
Termíny studijních záznamů
Hlavní termíny studia
Začátek studia (Aktuální)
Primární dokončení (Aktuální)
Dokončení studie (Aktuální)
Termíny zápisu do studia
První předloženo
První předloženo, které splnilo kritéria kontroly kvality
První zveřejněno (Aktuální)
Aktualizace studijních záznamů
Poslední zveřejněná aktualizace (Aktuální)
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
Naposledy ověřeno
Více informací
Termíny související s touto studií
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