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- Ensaio Clínico NCT07708051
Clinical and Histological Evaluation of Subepithelial Connective Tissue Graft Maturation at Different Healing Timepoints, With and Without Topical Application of a Polynucleotide- and Hyaluronic Acid-Based Gel
Clinical and Histological Evaluation of Subepithelial Connective Tissue Graft Maturation at Different Healing Timepoints, With and Without Topical Application of a Polynucleotide- and Hyaluronic Acid-Based Gel: A Randomized, Blinded, Controlled Clinical Trial With a Split-Mouth Design
Visão geral do estudo
Status
Condições
Descrição detalhada
Surgical procedures and sample collections will be performed at Instituto Kahn Odontologia (Rio de Janeiro, Brazil). Laboratory analyses will be conducted at the Histology Laboratory of the School of Dentistry of Ribeirao Preto, University of Sao Paulo (FORP-USP).
SCTG removal will be performed using the double incision technique (Harris, 2003) with a standardized 1.5 mm guide scalpel, under local anesthesia (2% lidocaine, 1:100,000 epinephrine). From each graft, a standardized fragment (3×3 mm, 1.5 mm thickness) will be collected from the distal portion and immediately fixed in 10% buffered formalin for 24-48 hours, then transferred to 70% alcohol.
Laboratory analyses will include: (1) Hematoxylin-eosin (HE) for general morphological assessment; (2) Picrosirius Red under polarized light for quantification of collagen density and proportion of type I and type III collagen fibers; (3) Immunohistochemistry for vascularization assessment, measuring microvessel density (n/mm²) and vascular area (%).
Statistical analysis will use paired Student's t-test or Wilcoxon test for paired samples, depending on data distribution (Shapiro-Wilk test), with significance level of 5% (p<0.05).
Tipo de estudo
Inscrição (Estimado)
Estágio
- Não aplicável
Contactos e Locais
Contato de estudo
- Nome: Marcella Kahn, DDS, MS Candidate
- Número de telefone: +5521988483846
- E-mail: mbkahn@usp.br
Estude backup de contato
- Nome: Michel Reis Messora, DDS, MS, PhD
- E-mail: m.messora@forp.usp.br
Critérios de participação
Critérios de elegibilidade
Idades elegíveis para estudo
- Adulto
Aceita Voluntários Saudáveis
Descrição
Inclusion Criteria:
- Age between 18 and 60 years
- Good general systemic health
- Presence of multiple bilateral gingival recessions with indication for root coverage
Exclusion Criteria:
- Smoking of any intensity
- Pregnancy or lactation
- Oral lesions or alterations in the palatal mucosa
- Previous history of graft harvesting from the donor area
- Continuous use of medications that interfere with the inflammatory response, such as corticosteroids or immunosuppressants
- Autoimmune diseases, coagulation disorders, or other systemic conditions affecting wound healing
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
- Finalidade Principal: Ciência básica
- Alocação: Randomizado
- Modelo Intervencional: Atribuição Paralela
- Mascaramento: Triplo
Armas e Intervenções
Grupo de Participantes / Braço |
Intervenção / Tratamento |
|---|---|
|
Experimental: Regenfast Gel Application Test Side
Palatal side randomized to receive a single topical application of polynucleotide and hyaluronic acid gel (Regenfast, 0.3 ml) immediately after subepithelial connective tissue graft (SCTG) harvesting in the first surgical session.
The contralateral side receives no intervention.
SCTG is harvested again from the same site after 9 weeks for histological and immunohistochemical analyses.
|
Single topical application of polynucleotide and hyaluronic acid gel (Regenfast, 0.3 ml) to the palatal donor site immediately after subepithelial connective tissue graft harvesting in the first surgical session, before suturing.
Bilateral subepithelial connective tissue graft harvesting from the palatal donor site using the double incision technique (Harris, 2003) with a standardized 1.5 mm guide scalpel, under local anesthesia (2% lidocaine with 1:100,000 epinephrine).
Performed in two surgical sessions with a 9-week interval.
|
|
Comparador Ativo: No Intervention - Control Side
Contralateral palatal side receiving no topical intervention after SCTG harvesting in the first surgical session.
SCTG is harvested again from the same site after 9 weeks.
This arm serves as control for both the healing time comparison (baseline vs 9 weeks) and the biomaterial effect comparison.
|
Bilateral subepithelial connective tissue graft harvesting from the palatal donor site using the double incision technique (Harris, 2003) with a standardized 1.5 mm guide scalpel, under local anesthesia (2% lidocaine with 1:100,000 epinephrine).
Performed in two surgical sessions with a 9-week interval.
|
O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
|
Histological Tissue Architecture of the Subepithelial Connective Tissue Graft
Prazo: Baseline and 9 weeks after initial graft harvesting
|
Morphological evaluation of tissue architecture using hematoxylin-eosin (HE) staining, assessing cellular organization, connective tissue maturation, and overall structural quality of grafts harvested at baseline and 9 weeks after initial harvesting, with and without topical application of polynucleotide and hyaluronic acid gel (Regenfast®).
|
Baseline and 9 weeks after initial graft harvesting
|
|
Collagen Density and Fiber Maturation of the Subepithelial Connective Tissue Graft
Prazo: Baseline and 9 weeks after initial graft harvesting
|
Quantification of collagen density and proportion of type I and type III collagen fibers using Picrosirius Red staining under polarized light microscopy, comparing grafts harvested at baseline and 9 weeks after initial harvesting, with and without topical application of polynucleotide and hyaluronic acid gel (Regenfast®).
|
Baseline and 9 weeks after initial graft harvesting
|
|
Microvascular Density and Vascular Area of the Subepithelial Connective Tissue Graft
Prazo: Baseline and 9 weeks after initial graft harvesting
|
Immunohistochemical evaluation of vascularization, assessing microvessel density (number/mm²) and vascular area (%) of grafts harvested at baseline and 9 weeks after initial harvesting, with and without topical application of polynucleotide and hyaluronic acid gel (Regenfast®).
|
Baseline and 9 weeks after initial graft harvesting
|
Colaboradores e Investigadores
Patrocinador
Colaboradores
Investigadores
- Investigador principal: Marcella B Kahn, DDS, MS Candidate, Faculdade de Odontologia de Ribeirão Preto, Universidade de São Paulo (FORP-USP)
- Cadeira de estudo: Michel Reis Messora, DDS, MS, PhD, Faculdade de Odontologia de Ribeirão Preto, Universidade de São Paulo (FORP-USP) Role: Study Chair
- Diretor de estudo: Sergio Kahn, DDS, MS, PhD, Instituto Kahn Odontologia, Rio de Janeiro
Publicações e links úteis
Publicações Gerais
- Soileau KM, Brannon RB. A histologic evaluation of various stages of palatal healing following subepithelial connective tissue grafting procedures: a comparison of eight cases. J Periodontol. 2006 Jul;77(7):1267-73. doi: 10.1902/jop.2006.050129.
- Harris RJ. The connective tissue and partial thickness double pedicle graft: a predictable method of obtaining root coverage. J Periodontol. 1992 May;63(5):477-86. doi: 10.1902/jop.1992.63.5.477.
- Pilloni A, Rojas MA, Trezza C, Carere M, De Filippis A, Marsala RL, Marini L. Clinical effects of the adjunctive use of polynucleotide and hyaluronic acid-based gel in the subgingival re-instrumentation of residual periodontal pockets: A randomized, split-mouth clinical trial. J Periodontol. 2023 Mar;94(3):354-363. doi: 10.1002/JPER.22-0225. Epub 2022 Nov 23.
- Tavelli L, Barootchi S, Stefanini M, Zucchelli G, Giannobile WV, Wang HL. Wound healing dynamics, morbidity, and complications of palatal soft-tissue harvesting. Periodontol 2000. 2023 Jun;92(1):90-119. doi: 10.1111/prd.12466. Epub 2022 Dec 30.
- Tavelli L, Barootchi S, Siqueira R, Kauffmann F, Majzoub J, Stefanini M, Zucchelli G, Wang HL. Three-Dimensional Volumetric Analysis of the Palatal Donor Site Following Soft Tissue Harvesting. Int J Periodontics Restorative Dent. 2022 May-Jun;42(3):393-399. doi: 10.11607/prd.5268.
- Harris RJ. Histologic evaluation of connective tissue grafts in humans. Int J Periodontics Restorative Dent. 2003 Dec;23(6):575-83.
- Cairo F, Cavalcanti R, Barbato L, Nieri M, Castelluzzo W, di Martino M, Pilloni A. Polynucleotides and Hyaluronic Acid (PN-HA) Mixture With or Without Deproteinized Bovine Bone Mineral as a Novel Approach for the Treatment of Deep Infrabony Defects: A Retrospective Case Series. Int J Periodontics Restorative Dent. 2025 Mar 6;45(2):153-163. doi: 10.11607/prd.7065.
- Skierska I, Gorski B, Fus L. Tunnel technique and subepithelial connective tissue graft, with or without cross-linked hyaluronic acid, in the treatment of multiple gingival recessions: 12-month outcomes of a randomized clinical trial. J Periodontol. 2024 Nov;95(11):1060-1072. doi: 10.1002/JPER.24-0093. Epub 2024 May 29.
Datas de registro do estudo
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Conclusão Primária (Estimado)
Conclusão do estudo (Estimado)
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Mais Informações
Termos relacionados a este estudo
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Outros números de identificação do estudo
- 95625625.9.0000.5419 (Outro identificador: Plataforma Brasil)
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