[The experimental validation of the potential use of hydroxyapatite-containing preparations for the obturation of the dentin tubules in prepared teeth].
Ultramicroscopic hydroxyapatite (UMHA) was used for obturation of dentine tubules of prepared teeth in dog experiments. Scanning electron microscopy showed that amorphous layer on the tooth surface prevents the penetration of UMHA in the tubules. This layer is not removed by the traditional treatment with alcohol and ether. Exposure of dentin to primer sintac altered the amorphous layer, but did not completely remove it. Solutions consisting of 10% citric acid and 3% iron chloride or 10% EDTA completely removed the amorphous layer in 1 min and permitted hydroxyapatite penetrate in the dentin canaliculi and obturate them. The agent more effectively penetrates in the dentin tubules of vital teeth than of pulp-free ones.
Garazha
S N
SN
Volozhin
A I
AI
Doktorov
A A
AA
D000818:Animals; D003442:Crowns; D003793:Dental Restoration, Permanent / Q000379:methods*; D003804:Dentin / Q000187:drug effects* / Q000648:ultrastructure; D004285:Dogs; D017886:Durapatite / Q000494:pharmacology*; D066298:In Vitro Techniques; D008422:Materials Testing / Q000379:methods; D008855:Microscopy, Electron, Scanning; D010316:Particle Size; D010895:Pit and Fissure Sealants / Q000494:pharmacology*; D016369:Smear Layer; D013997:Time Factors; D019228:Tooth Crown / Q000187:drug effects / Q000648:ultrastructure
D010895:Pit and Fissure Sealants; D017886:Durapatite
Eksperimental'noe obosnovanie vozmozhnosti ispol'zovaniia gidroksiapatitsoderzhashchikh preparatov dlia obturatsii dentinnykh trubochek preparirovannykh zubov.