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An in vitro study was conducted to evaluate time dependent dimensional stability of four interocclusal record materials( bite registration wax, polyether, PVS & ZOE). A stainless steel die , made according to modified ADA specification No.19, loaded with different interocclusal recording materials. These materials were separated from die 3 min after their respective setting time, which results in discs of standard diameter with two parallel lines and three perpendicular lines on the surface , at different time intervals ie: 1 hour,24,48and 72 hours. These lines observed under travelling...

The edentulous obturator patient has greater problems in retention, speech, and mastication than the conventional maxillary denture patient. While it seems obvious that these patients would benefit from implants placed in the maxilla, lack of suitable bone quality and quantity in the remaining arch and within the residual bones of the skull on the surgical side precludes widespread use of implants. Bone grafts and sinus lifts are usually needed in the remaining arch, but patients are often reluctant to undergo more surgery. Adjuvant radiotherapy leads to increased implant failure in the...