Contribution of initial lymphatics to oral wound healing after tooth extraction

Author:

Virtej Anca1234ORCID,Marti Larissa1ORCID,Wagner Marek15ORCID,Wiig Helge1ORCID,Xue Ying24ORCID,Bletsa Athanasia26ORCID,Berggreen Ellen1ORCID

Affiliation:

1. Department of Biomedicine University of Bergen Bergen Norway

2. Department of Clinical Dentistry University of Bergen Bergen Norway

3. Department of Oral Surgery Haukeland University Hospital Bergen Norway

4. Department of Clinical Dentistry The Arctic University of Tromsø Faculty of Health Sciences Tromsø Norway

5. Łukasiewicz Research Network ‐ PORT Polish Center for Technology Development Cancer Biomarkers Research Group Wroclaw Poland

6. Oral Centre of Expertise in Western Norway Bergen Norway

Abstract

AbstractLymphatics are involved in the resolution of inflammation and wound healing, but their role in the oral wound healing process after tooth extraction has never been investigated. We therefore sought to evaluate the healing process following the extraction of maxillary molars in two transgenic mouse models: K14‐VEGFR3‐Ig mice, which lack initial mucosal lymphatic vessels, and K14‐VEGFC mice, which have hyperplastic mucosal lymphatics. Maxillary molars were extracted from both transgenic mouse types and their corresponding wild‐type (WT) controls. Mucosal and alveolar bone healing were evaluated. A delayed epithelialization and bone regeneration were observed in K14‐VEGFR3‐Ig mice compared with their WT littermates. The hampered wound closure was accompanied by decreased levels of epidermal growth factor (EGF) and persistent inflammation, characterized by infiltrates of immune cells and elevated levels of pro‐inflammatory markers in the wounds. Hyperplastic mucosal lymphatics did not enhance the healing process after tooth extraction in K14‐VEGFC mice. The findings indicate that initial mucosal lymphatics play a major role in the initial phase of the oral wound healing process.

Funder

Universitetet i Bergen

Publisher

Wiley

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