Cementogenesis and the induction of periodontal tissue regeneration by the osteogenic proteins of the transforming growth factor‐β superfamily
Identifieur interne : 000990 ( Main/Exploration ); précédent : 000989; suivant : 000991Cementogenesis and the induction of periodontal tissue regeneration by the osteogenic proteins of the transforming growth factor‐β superfamily
Auteurs : U. Ripamonti [Afrique du Sud] ; J-C. Petit [Afrique du Sud] ; J. Teare [Afrique du Sud]Source :
- Journal of Periodontal Research [ 0022-3484 ] ; 2009-04.
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Abstract
Theantiquity and severity of periodontal diseases are demonstrated by the hard evidence of alveolar bone loss in gnathic remains of the Pliocene/Pleistocene deposits of the Bloubank Valley at Sterkfontein, Swartkrans and Kromdrai in South Africa. Extant Homo has characterized and cloned a superfamily of proteins which include the bone morphogenetic proteins that regulate tooth morphogenesis at different stages of development as temporally and spatially connected events. The induction of cementogenesis, periodontal ligament and alveolar bone regeneration are regulated by the co‐ordinated expression of bone morphogenetic proteins. Naturally derived and recombinant human bone morphogenetic proteins induce periodontal tissue regeneration in mammals. Morphological analyses on undecalcified sections cut at 3–6 μm on a series of mandibular molar Class II and III furcation defects induced in the non‐human primate Papio ursinus show the induction of cementogenesis. Sharpey’s fibers nucleate as a series of composite collagen bundles within the cementoid matrix in close relation to embedded cementocytes. Osteogenic protein‐1 and bone morphogenetic protein‐2 possess a structure–activity profile, as shown by the morphology of tissue regeneration, preferentially cementogenic and osteogenic, respectively. In Papio ursinus, transforming growth factor‐β3 also induces cementogenesis, with Sharpey’s fibers inserting into newly formed alveolar bone. Capillary sprouting and invasion determine the sequential insertion and alignment of individual collagenic bundles. The addition of responding stem cells prepared by finely mincing fragments of autogenous rectus abdominis muscle significantly enhances the induction of periodontal tissue regeneration when combined with transforming growth factor‐β3 implanted in Class II and III furcation defects of Papio ursinus.
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DOI: 10.1111/j.1600-0765.2008.01158.x
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Extant Homo has characterized and cloned a superfamily of proteins which include the bone morphogenetic proteins that regulate tooth morphogenesis at different stages of development as temporally and spatially connected events. The induction of cementogenesis, periodontal ligament and alveolar bone regeneration are regulated by the co‐ordinated expression of bone morphogenetic proteins. Naturally derived and recombinant human bone morphogenetic proteins induce periodontal tissue regeneration in mammals. Morphological analyses on undecalcified sections cut at 3–6 μm on a series of mandibular molar Class II and III furcation defects induced in the non‐human primate Papio ursinus show the induction of cementogenesis. Sharpey’s fibers nucleate as a series of composite collagen bundles within the cementoid matrix in close relation to embedded cementocytes. Osteogenic protein‐1 and bone morphogenetic protein‐2 possess a structure–activity profile, as shown by the morphology of tissue regeneration, preferentially cementogenic and osteogenic, respectively. In Papio ursinus, transforming growth factor‐β3 also induces cementogenesis, with Sharpey’s fibers inserting into newly formed alveolar bone. Capillary sprouting and invasion determine the sequential insertion and alignment of individual collagenic bundles. 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