Results A two-year follow-up revealed there occurred butment caries,luxated butment,and overlain residual root gingivitis,even on the rise,while the alveolar ridge showed no uneven absorption.
The characteristics of pulsed electron beam generated by multiplate pseudospark chamber (MPC) on the basis of field escalation effects have been described in this paper.
Considerable attention has been given to imperfections of information and of competition, to transaction costs, indivisibilities, and increasing returns, and to some of the relations among these.