Creation of a chimaeric periodontium in the rat by isotopic tooth germ transplantation.
The purpose of this work was to develop and test a chimaeric periodontium in which it would be possible to distinguish between connective tissue cells of odontogenic and oral mucosal origin. The recombinant periodontium was created by transplanting first maxillary molar tooth germs with their follicles from 1-3-day-old hooded Lister rats into the corresponding evacuated crypts of 6-9-day-old histocompatible recipients of the same strain. Of 71 transplants, 22 had formed erupted teeth 3 weeks later, with dentogingival junctions and periodontal ligaments histologically similar to those of control teeth. The recombinant nature of the graft periodontium was confirmed by incubating tooth germs in vitro with tritiated thymidine before grafting them, and then demonstrating radiolabelled nuclei in the dentogingival junctions formed by the transplants. Labelled cells were randomly distributed within the periodontal ligament and predominantly near to the basement membrane of junctional epithelium.
Hewage
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Department of Clinical Dental Science, School of Dentistry, University of Liverpool, England.
Heaney
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TG
D000818:Animals; D002678:Chimera; D003094:Collagen; D003238:Connective Tissue / Q000033:anatomy & histology; D003795:Dental Sac / Q000637:transplantation; D005881:Gingiva / Q000033:anatomy & histology; D008963:Molar; D010513:Periodontal Ligament / Q000033:anatomy & histology; D010519:Periodontium / Q000033:anatomy & histology*; D051381:Rats; D011919:Rats, Inbred Strains; D014083:Tooth Germ / Q000637:transplantation*
D003094:Collagen