a method of forming dental products , such as dentures , denture relines , dental crowns , dental bridges and dental restorative materials , temporary crown , temporary bridge , provisional crown or provisional bridge , from two polymerizable paste compositions each having a complimentary component of a free radical catalyst system and a polymerizable acrylic compound . one of these paste compositions includes an oxidizing agent and a stabilizer and the other includes a reducing agent as components of a redox catalyst system for free radical polymerization . these paste compositions are mixed in a static mixer to form a polymerizing paste composition , which is then shaped into a dental prosthesis . a handheld mixing dispenser useful in carrying out this method , includes a static mixing conduit , and two containers enclosing the polymerizable paste compositions . the static mixing conduit encloses a static mixing member . the containers are adapted to be connected in fluid flow communication with the static mixing conduit . in the paste composition which includes the reducing agent a photoinitiator may be preferably included . each container is sufficiently oxygen permeable to maintain inhibition of polymerization of the polymerizable paste composition therein for at least 12 months at 23 ° c .