Evaluation of the accuracy of cast reorientation to a surveyor by prosthodontic residents.
This study investigated the accuracy of a group of evaluators in reestablishing the orientation of a tripoded master cast to a surveyor instrument. Three prosthodontic residents served as evaluators to reestablish the tilt of a previously tripoded cast with three known reference coordinates. The distance from the known to the reference point was recorded for the three points in four trials by a judge with a machinist height gauge. Analysis of variance revealed a significant difference between the evaluator cast position and the known reference position. The investigation demonstrated +/- 0.2 mm errors at each of the three locations; 0.3-degree angulation errors occurred in reestablishing the tilt of the master cast in relation to the surveyor.
Bowley
J F
JF
University of Nebraska Medical Center, College of Dentistry, Lincoln.
Cipra
D L
DL
Herman
P F
PF
D000704:Analysis of Variance; D002138:Calibration; D003779:Denture Design / Q000295:instrumentation*; D003829:Denture, Partial; D005069:Evaluation Studies as Topic; D006801:Humans; D007396:Internship and Residency; D007574:Jaw Relation Record; D003765:Models, Dental; D011476:Prosthodontics / Q000193:education*; D015203:Reproducibility of Results