Tooth slice-based models for the study of human dental pulp angiogenesis.
Treatment of avulsed young permanent teeth aims to revascularize the dental pulp. The study of therapeutic strategies for avulsed teeth has been hindered by the scarcity of experimental models. The purpose of this work is to characterize two model systems to study dental pulp revascularization. Tooth slices from human third molars were prepared with a sterile diamond saw. The tooth slices were cultured in vitro for up to 7 days. Immunohistochemical staining with Factor VIII showed an increase in microvascular density in pulps treated with 50 ng/mL rhVEGF(165) as compared with untreated controls (p < 0.05). Alternatively, tooth slices were prepared and immediately implanted subcutaneously in immunodeficient mice. Pulp vitality and vascularization were confirmed by histological analysis and terminal deoxynucleotide transferase dUTP nick end labeling assays 7 days after implantation. The models presented here may be valuable in the assessment of angiogenesis-based therapeutic strategies for the dental pulp.
Gonçalves
Silvana B
SB
Department of Cariology, Restorative Sciences and Endodontics, University of Michigan School of Dentistry, Ann Arbor, Michigan 48109-1078, USA.
Dong
Zhihong
Z
Bramante
Clovis M
CM
Holland
Graham R
GR
Smith
Anthony J
AJ
Nör
Jacques E
JE
D000818:Animals; D003782:Dental Pulp / Q000098:blood supply*; D005169:Factor VIII; D005260:Female; D006801:Humans; D051379:Mice; D016513:Mice, SCID; D018919:Neovascularization, Physiologic / Q000187:drug effects / Q000502:physiology*; D014084:Tooth Avulsion / Q000628:therapy; D042461:Vascular Endothelial Growth Factor A / Q000494:pharmacology