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Guided Bone Regeneration Combined With PRGF for Atrophic Edentulous Maxilla (GBR-PRGF-Maxil)

3 septembre 2026 mis à jour par: Universidade do Porto

Guided Bone Regeneration Combined With Plasma Rich in Growth Factors for Vertical and Horizontal Augmentation of the Atrophic Edentulous Maxilla: A Prospective Clinical Case Series With One-Year Follow-up

This prospective interventional clinical study evaluated guided bone regeneration combined with plasma rich in growth factors for vertical and horizontal augmentation of the atrophic edentulous maxilla.

Participants with severe maxillary ridge atrophy requiring bone augmentation before implant-supported rehabilitation underwent guided bone regeneration using a composite graft of autogenous bone and anorganic bovine bone mineral combined with plasma rich in growth factors. Barrier membranes were stabilised with titanium pins, and lateral-window sinus floor elevation was performed when indicated. Implants were placed using a delayed protocol at re-entry after 6-9 months.

Radiographic bone height and width were assessed by cone-beam computed tomography before surgery, immediately after surgery, at 6-9 months, and at 12 months. The study also recorded graft dimensional stability, implant placement, and surgical or postoperative complications.

Aperçu de l'étude

Statut

Complété

Les conditions

Intervention / Traitement

Description détaillée

Severe atrophy of the edentulous maxilla may limit fixed implant-supported rehabilitation because of insufficient residual alveolar ridge height and width. Guided bone regeneration is used to reconstruct deficient ridges before implant placement, while plasma rich in growth factors may provide an autologous fibrin matrix enriched with platelet-derived mediators.

This prospective clinical study assessed a guided bone regeneration protocol combined with plasma rich in growth factors for reconstruction of the atrophic edentulous maxilla. Eligible participants presented with an edentulous atrophic maxilla requiring vertical and/or horizontal ridge augmentation before implant placement. The surgical protocol included guided bone regeneration using a composite graft of autogenous bone and anorganic bovine bone mineral in a 60:40 ratio, combined with plasma rich in growth factors prepared from autologous blood. The grafted area was covered with a barrier membrane stabilised with titanium pins. Titanium-reinforced PTFE membranes were used for defects requiring vertical space maintenance, while collagen membranes were used for horizontal augmentations. Lateral-window sinus floor elevation was performed simultaneously when indicated by posterior maxillary anatomy.

Cone-beam computed tomography was obtained pre-surgically, immediately post-operatively, at 6-9 months, and at 12 months. Linear vertical and horizontal bone measurements were performed at three standardised maxillary reference sites: the lateral wall of the nasal cavity, the medial wall of the maxillary sinus, and the zygomatic apophysis. Bone gain was calculated in millimetres and as percentage change relative to the pre-surgical dimension. Graft resorption was calculated between the immediate post-operative and 12-month assessments. Implant placement and intraoperative or postoperative complications were also recorded.

Type d'étude

Interventionnel

Inscription (Réel)

11

Phase

  • N'est pas applicable

Contacts et emplacements

Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.

Lieux d'étude

  • Le Portugal
      • Porto, Le Portugal
        • Faculty of Dental Medicine, university of Porto

Critères de participation

Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.

Critère d'éligibilité

Âges éligibles pour étudier

  • Adulte
  • Adulte plus âgé

Accepte les volontaires sains

Non

La description

Inclusion Criteria:

  • Age 18 years or older
  • Fully edentulous maxilla requiring implant-supported fixed oral rehabilitation
  • Atrophic maxillary alveolar ridge requiring vertical and/or horizontal bone augmentation before implant placement
  • Residual alveolar ridge width below 6 mm and/or residual bone height below 10 mm, as assessed by cone-beam computed tomography
  • ASA physical status I or II
  • Clinical indication for guided bone regeneration, with or without simultaneous maxillary sinus floor elevation
  • Adequate oral hygiene and willingness to comply with postoperative instructions and follow-up visits
  • Written informed consent provided.

Exclusion Criteria:

  • ASA physical status III or higher
  • Uncontrolled systemic disease contraindicating oral surgery or bone regenerative procedures
  • Uncontrolled diabetes mellitus or other systemic condition expected to impair wound healing or bone regeneration
  • History of radiotherapy to the head and neck region
  • Current or previous intravenous antiresorptive or antiangiogenic therapy associated with risk of medication-related osteonecrosis of the jaw
  • Active oral infection at the surgical site
  • Untreated periodontal disease or poor oral hygiene incompatible with regenerative surgery
  • Heavy smoking or unwillingness to comply with perioperative smoking restrictions
  • Pregnancy or breastfeeding
  • Inability to understand the study procedures or provide informed consent
  • Inability or unwillingness to attend scheduled follow-up visits
  • Any medical, anatomical, or behavioural condition judged by the investigator to interfere with surgery, healing, follow-up, or interpretation of outcomes

Plan d'étude

Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.

Comment l'étude est-elle conçue ?

Détails de conception

  • Objectif principal: Traitement
  • Répartition: N / A
  • Modèle interventionnel: Affectation à un seul groupe
  • Masquage: Aucun (étiquette ouverte)

Armes et Interventions

Groupe de participants / Bras
Intervention / Traitement
Expérimental: GBR Combined With PRGF
Participants with an atrophic edentulous maxilla requiring vertical and/or horizontal bone augmentation before implant-supported rehabilitation underwent guided bone regeneration combined with plasma rich in growth factors. The procedure used a composite graft of autogenous bone and anorganic bovine bone mineral combined with PRGF. Barrier membranes were stabilised with titanium pins, and simultaneous lateral-window sinus floor elevation was performed when clinically indicated.
Procédure: Guided Bone Regeneration Combined With Plasma Rich in Growth Factors
Guided bone regeneration was performed for reconstruction of the atrophic edentulous maxilla. Autogenous bone harvested intra-orally was combined with anorganic bovine bone mineral in a 60:40 ratio and mixed with autologous plasma rich in growth factors. The grafted area was covered with a barrier membrane stabilised with titanium pins. Titanium-reinforced PTFE membranes were used for defects requiring vertical space maintenance, while collagen membranes were used for horizontal augmentations. Lateral-window sinus floor elevation was performed simultaneously when indicated. Implants were placed using a delayed protocol at re-entry after 6-9 months.
Autres noms:
  • GBR + PRGF
  • Plasma Rich in Growth Factors
  • Vertical Ridge Augmentation
  • Horizontal Ridge Augmentation
  • Alveolar Ridge Augmentation
  • Sinus Floor Elevation

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
Change in Vertical and Horizontal Maxillary Bone Dimensions
Délai: Pre-surgery, immediately post-operative, 6-9 months, and 12 months
Vertical and horizontal bone dimensions were measured using standardized cone-beam computed tomography at three maxillary reference sites: the lateral wall of the nasal cavity, the medial wall of the maxillary sinus, and the zygomatic apophysis. Bone gain was calculated in millimeters and as percentage change relative to the pre-surgical dimension.
Pre-surgery, immediately post-operative, 6-9 months, and 12 months

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Graft Resorption
Délai: Immediately post-operative to 12 months
Graft resorption was calculated as the percentage change in vertical and horizontal bone dimensions between the immediate post-operative CBCT and the 12-month CBCT assessment.
Immediately post-operative to 12 months
Number of Dental Implants Placed
Délai: 6-9 months after augmentation
Number of dental implants placed during delayed implant placement at re-entry following guided bone regeneration.
6-9 months after augmentation
Incidence of Surgical and Postoperative Complications
Délai: From augmentation surgery to 12 months
Intraoperative and postoperative complications were recorded, including infection, graft loss, membrane-related complications, and other adverse events. Complications were classified according to severity and whether they affected graft integrity.
From augmentation surgery to 12 months

Collaborateurs et enquêteurs

C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.

Parrainer

Universidade do Porto

Dates d'enregistrement des études

Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.

Dates principales de l'étude

Début de l'étude (Réel)

1 mars 2023

Achèvement primaire (Réel)

30 novembre 2025

Achèvement de l'étude (Réel)

31 décembre 2025

Dates d'inscription aux études

Première soumission

12 juin 2026

Première soumission répondant aux critères de contrôle qualité

12 juin 2026

Première publication (Réel)

17 juin 2026

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

9 septembre 2026

Dernière mise à jour soumise répondant aux critères de contrôle qualité

3 septembre 2026

Dernière vérification

1 juin 2026

Plus d'information

Termes liés à cette étude

Termes MeSH pertinents supplémentaires

Autres numéros d'identification d'étude

  • 5/2022 FMDUP-PRGF
  • 5/2022 (Autre identifiant: Ethics Committee for Health of the Faculty of Dental Medicine, U. Porto)

Plan pour les données individuelles des participants (IPD)

Prévoyez-vous de partager les données individuelles des participants (DPI) ?

NON

Description du régime IPD

Individual participant data will not be publicly shared because of the small sample size, the single-centre nature of the study, and the potential risk of participant re-identification from clinical, radiographic, and surgical data.

Informations sur les médicaments et les dispositifs, documents d'étude

Étudie un produit pharmaceutique réglementé par la FDA américaine

Non

Étudie un produit d'appareil réglementé par la FDA américaine

Non

Ces informations ont été extraites directement du site Web clinicaltrials.gov sans aucune modification. Si vous avez des demandes de modification, de suppression ou de mise à jour des détails de votre étude, veuillez contacter register@clinicaltrials.gov. Dès qu'un changement est mis en œuvre sur clinicaltrials.gov, il sera également mis à jour automatiquement sur notre site Web .

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