Cette page a été traduite automatiquement et l'exactitude de la traduction n'est pas garantie. Veuillez vous référer au version anglaise pour un texte source.

Bone Marrow Mononuclear Cells for the Repair of Severe Maxillofacial Bone Defects

28 septembre 2026 mis à jour par: The Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School

A Clinical Study of Autologous Bone Marrow Mononuclear Cells Combined With Bio-oss® for the Repair of Severe Maxillofacial Bone Defects

This is a single-center, single-arm, open-label clinical study conducted at the Department of Stomatology, Nanjing Drum Tower Hospital. The study aims to evaluate the safety and efficacy of autologous bone marrow-derived mononuclear cells (BMMNCs) combined with a bone graft material (Bio-Oss) for the repair of severe maxillofacial (alveolar/jaw) bone defects caused by inflammation, trauma, or other reasons.

Approximately 20 patients aged 18-60 years with severe alveolar bone resorption requiring bone grafting will be enrolled. About 60 mL of autologous bone marrow will be aspirated from the iliac crest, and BMMNCs will be isolated by density-gradient centrifugation under GMP conditions without in vitro expansion. The BMMNCs will be mixed with Bio-Oss bone graft material and implanted into the bone defect, covered with a collagen membrane. Cone-beam CT (CBCT) will be performed postoperatively to assess new bone formation. Follow-up visits are scheduled at 1 week, 1 month, 3 months, and 6 months after surgery. The primary outcome is the new bone volume fraction in the grafted area measured by CBCT. Safety will be assessed by clinical examination of the implantation site and laboratory tests (blood routine, urinalysis, liver and kidney function, blood glucose).

Aperçu de l'étude

Statut

Recrutement

Les conditions

Intervention / Traitement

Description détaillée

Severe maxillofacial bone defects caused by trauma, tumor resection, congenital diseases (e.g., cleft lip and palate), or severe periodontitis-related alveolar bone resorption remain a major clinical challenge. Conventional bone grafting approaches (autologous bone, allogeneic bone, xenogeneic bone substitutes) have limitations including limited bone volume, additional donor-site morbidity, immune rejection, and unpredictable graft resorption.

Bone marrow-derived mononuclear cells (BMMNCs) contain hematopoietic stem cells, mesenchymal stem cells, and other progenitor populations with osteogenic and regenerative potential. Unlike mesenchymal stem cell-based approaches, BMMNCs can be used directly without in vitro expansion, shortening the treatment cycle and reducing cost and biosafety risks.

In this study, eligible patients will undergo the following procedure under local anesthesia: the mucoperiosteum at the defect site is incised and reflected, fibrous connective tissue is removed, and nourishing holes are prepared with a turbine drill. Approximately 60 mL of autologous bone marrow is aspirated from the iliac crest; BMMNCs are isolated using human peripheral blood lymphocyte separation medium by density-gradient centrifugation in a GMP-grade cell preparation facility, with quality control testing. The freshly prepared BMMNCs are mixed with an appropriate amount of Bio-Oss bone graft material, implanted into the defect, covered with a collagen membrane, and the wound is sutured. Perioperative antibiotics are routinely used.

CBCT scans are obtained immediately after surgery and at 3 and 6 months to measure the new bone volume fraction in the grafted area. If bone formation is adequate at 6 months, dental implant placement may be performed in the edentulous area. Clinical symptoms and signs are assessed immediately after surgery and at 1 week, 1 month, 3 months, and 6 months. Laboratory safety tests (complete blood count, urinalysis, liver and kidney function, blood glucose) are performed preoperatively and at postoperative follow-up visits. Adverse events are recorded and graded according to CTCAE from enrollment to the end of the study.

Type d'étude

Interventionnel

Inscription (Estimé)

20

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.

Coordonnées de l'étude

Lieux d'étude

  • Chine
    • Jiangsu
      • Nanjing, Jiangsu, Chine, 210008
        • Recrutement
        • Nanjing Drum Tower Hospital, Nanjing University Medical School

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

16 ans à 60 ans (Enfant, Adulte)

Accepte les volontaires sains

Non

Sexes éligibles pour l'étude

Tout

La description

Inclusion Criteria:

  • Patients with severe alveolar bone resorption caused by inflammation, trauma, or other reasons, requiring bone grafting;
  • Aged 18 to 60 years;
  • No systemic diseases such as hypertension, diabetes, heart disease, or immunodeficiency;
  • Fully informed of the entire study process, willing to participate, and able to sign the informed consent form.

Exclusion Criteria:

  • Patients without maxillofacial bone defects;
  • Patients with systemic diseases such as hypertension, heart disease, or diabetes;
  • Patients who have recently received immunosuppressive therapy;
  • Women who are planning pregnancy, pregnant, or breastfeeding;
  • Patients with allergic constitution or a history of allergy to drugs or food;
  • Patients with poor oral hygiene habits who cannot comply with medical advice, which may affect efficacy assessment;
  • Patients who have participated in other clinical trials within the past 4 weeks.

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: Autologous BMMNCs + Bio-Oss bone graft

Patients receive transplantation of autologous bone marrow-derived mononuclear cells (BMMNCs) mixed with Bio-Oss bone graft material into the maxillofacial/alveolar bone defect, covered with a collagen membrane. Bone marrow (approximately 60 mL) is aspirated from the iliac crest; BMMNCs are isolated by density-gradient centrifugation without in vitro expansion.
Biologique: Autologous bone marrow-derived mononuclear cells (BMMNCs)

Approximately 60 mL of autologous bone marrow is aspirated from the iliac crest. BMMNCs are isolated using human peripheral blood lymphocyte separation medium by density-gradient centrifugation under GMP conditions, with quality control testing, and used fresh without in vitro expansion. The BMMNCs are mixed with an appropriate amount of Bio-Oss bone graft material and implanted into the bone defect during surgery under local anesthesia, covered with a collagen membrane. Perioperative antibiotics are routinely administered.

Autres noms:
  • BMMNC
Autre: Bio-Oss bone graft material with collagen membrane

Bio-Oss xenogeneic bone graft material mixed with BMMNCs and implanted into the defect; the graft is covered with a collagen membrane.

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
New bone volume fraction in the grafted bone defect area measured by CBCT
Délai: Immediately after surgery, 3 months, and 6 months after surgery (primary assessment at 6 months)

The volume fraction of newly formed bone in the grafted defect area, measured and analyzed on cone-beam computed tomography (CBCT) images and reported as a percentage of new bone volume relative to the total grafted defect volume.
Immediately after surgery, 3 months, and 6 months after surgery (primary assessment at 6 months)

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Pain intensity assessed by Visual Analog Scale (VAS)
Délai: Immediately after surgery, 1 week, 1 month, 3 months, and 6 months after surgery

Pain at the surgical site assessed using the Visual Analog Scale (VAS), a 0-10 scale where 0 = no pain and 10 = worst imaginable pain. Higher scores indicate a worse outcome (more pain).
Immediately after surgery, 1 week, 1 month, 3 months, and 6 months after surgery
Number of participants reporting good comfort without foreign body sensation
Délai: Up to 6 months after surgery

Patient self-reported comfort and absence of foreign body sensation, assessed by patient interview at each follow-up visit. Reported as the number of participants reporting good comfort.
Up to 6 months after surgery
Number of participants with complications requiring clinical management
Délai: Up to 6 months after surgery

Occurrence of persistent or irreversible symptoms and complications/comorbidities requiring clinical management, assessed at each follow-up visit. Reported as the number of participants with such events.
Up to 6 months after surgery

Autres mesures de résultats

Mesure des résultats
Description de la mesure
Délai
Number of participants with abnormal mucosa at the implantation site
Délai: 1 week, 1 month, 3 months, and 6 months after surgery

Clinical examination of the color, shape, and texture of the mucosa at the implantation site, documented by photography. Reported as the number of participants with any abnormal mucosal finding.
1 week, 1 month, 3 months, and 6 months after surgery
Number of participants with implant exposure
Délai: 1 week, 1 month, 3 months, and 6 months after surgery

Exposure of the implanted graft material at the implantation site, assessed by clinical examination and documented by photography. Reported as the number of participants with implant exposure.
1 week, 1 month, 3 months, and 6 months after surgery
Number of participants with clinically significant abnormal laboratory safety tests
Délai: Preoperatively and at 1 week, 1 month, 3 months, and 6 months after surgery

Laboratory safety assessments include complete blood count, urinalysis, liver and kidney function, and blood glucose. Results will be aggregated and reported as the number of participants with any clinically significant laboratory abnormality.
Preoperatively and at 1 week, 1 month, 3 months, and 6 months after surgery
Incidence and severity of adverse events
Délai: From enrollment to 6 months after surgery

All adverse events recorded from enrollment to end of study, graded according to the Common Terminology Criteria for Adverse Events (CTCAE) on a 5-grade scale: Grade 1 = mild, Grade 2 = moderate, Grade 3 = severe, Grade 4 = life-threatening or disabling, Grade 5 = death. Higher grades indicate a worse outcome. Reported as the number of participants with adverse events.
From enrollment to 6 months after surgery

Collaborateurs et enquêteurs

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

Parrainer

The Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School

Les enquêteurs

  • Chercheur principal: Haiyan Qin, MD, Nanjing Drum Tower Hospital, Nanjing University Medical School

Publications et liens utiles

La personne responsable de la saisie des informations sur l'étude fournit volontairement ces publications. Il peut s'agir de tout ce qui concerne l'étude.

Publications générales

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 novembre 2022

Achèvement primaire (Estimé)

1 janvier 2027

Achèvement de l'étude (Estimé)

1 septembre 2027

Dates d'inscription aux études

Première soumission

7 septembre 2026

Première soumission répondant aux critères de contrôle qualité

28 septembre 2026

Première publication (Réel)

1 octobre 2026

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

1 octobre 2026

Dernière mise à jour soumise répondant aux critères de contrôle qualité

28 septembre 2026

Dernière vérification

1 août 2026

Plus d'information

Termes liés à cette étude

Mots clés

Termes MeSH pertinents supplémentaires

Autres numéros d'identification d'étude

  • 2022-LCYJ-ZX-07

Plan pour les données individuelles des participants (IPD)

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

NON

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 .

S'abonner