Ta. Imbery et al., RETENTION OF COMPLEX AMALGAM RESTORATIONS USING SELF-THREADING PINS, AMALGAPINS, AND AMALGAMBOND, American journal of dentistry, 8(3), 1995, pp. 117-121
Purpose: To compare the shear fracture resistance of complex amalgam r
estorations retained by four regular TMS pins, four amalgapins, Amalga
mbond, or four amalgapins in conjunction with Amalgambond. Materials a
nd Methods: Sixty maxillary molars free of caries were mounted in acry
lic resin and the occlusal surfaces were ground flat to within 2 mm of
the CEJ. The specimens were randomly divided into four groups of 15 t
eeth. Each group provided one of the four different methods of resista
nce. Dispersalloy was condensed into the prepared specimens. The speci
mens were adjusted to provide 4 mm height of amalgam. After 1000 therm
ocycles, the specimens were loaded at a 45 degrees angle to the occlus
al surface at a crosshead speed of 1 mm/second. Results: Statistical a
nalysis revealed that Amalgambond, four amalgapins, and four amalgapin
s in conjunction with Amalgambond provided more resistance to shear fo
rce than four regular TMS pins.