[A biomechanical test of the rigidity of pin fixation in the root canals of human premolars and molars].
Three pin designs were under study: cone-like, with hatches, and snake-cranked. Fixation strength to rupture and compression of 1, 2, and 3 pins was examined. Snake-cranked pins were found best of all fixed in the root canal. The force needed to extract 1 pin was 2.92 +/- 0.3 H, for 2 pins 4.23 +/- 0.4 H, for 3 pins 9.64 +/- 0.4 H. To compress 1 pin the force equal to 7.7 +/- 0.4 H was necessary, 2 pins 16.63 +/- 0.1 H, 2 pins 23.73 +/- 0.5 H.
Pavliuk
V M
VM
Iasel'skiĭ
Iu M
IuM
D001641:Bicuspid / Q000502:physiology*; D003738:Dental Cements / Q000494:pharmacology; D003772:Dental Pins; D003799:Dental Stress Analysis; D006801:Humans; D066298:In Vitro Techniques; D008422:Materials Testing / Q000295:instrumentation / Q000379:methods; D008963:Molar / Q000502:physiology*; D012390:Root Canal Therapy; D013193:Stainless Steel
D003738:Dental Cements; D013193:Stainless Steel
Biomekhanicheskoe ispytanie prochnosti fiksatsii shtiftov v kornevykh kanalakh premoliarov i moliarov cheloveka.