The in-depth sealing properties of amalgam and composite restorative materials

Molar apicectomy with amalgam root-end filling: results of a prospective study in two district general hospitals

“…43 On the other hand, and leaving aside the controversy over the disadvantages of amalgam in terms of its toxicity, [44][45][46][47] it has been shown that this filling material is probably subject to significant leakage, especially initially. 12,[48][49][50] In our study the situation will have been compounded by the frequent difficulty we experienced in securing a bloodless field despite our use of high-speed suction. This too was related to poor access which could also create problems in allowing satisfactory amalgam condensation.…”

The sealing ability of materials used as retrograde root fillings in endodontic surgery

“…These conflicting results may be due to the differing markers and techniques used in each study. It has been shown that a surface gap having an average width of 10 [im exists between the amalgam and the cavity walls whether varnish is used or not (Ghafouri et al 1982). This size of gap was sufficient to allow bacteria as well as fluid to diffuse along the cavity walls.…”