In vitro consistency of the Periotest instrument.
OBJECTIVE
The consistency of measuring the damping characteristics using the Periotest (Siemens AG, Bensheim, Germany) was studied.


METHODS
Periotest values (PTV) of three rods embedded in various depths of impression material were recorded by seven dentists.


RESULTS
There is no statistically significant difference among the subjects in measuring PTV of any of the three rods. However, the variation in the occlusal-gingival position of impact resulted in statistically significant different PTV measurements of each of the three rods. Assessment of mobility of the same objects using a clinical criterion was found to be less consistent as the mobility of the object increased.


CONCLUSIONS
In vitro PTV measurements are consistent provided that the position of impact is controlled.
Chai
J Y
JY
Advanced Education Prosthodontics, Northwestern University Dental School, Chicago, IL 60611.
Yamada
J
J
Pang
I C
IC
D000704:Analysis of Variance; D003758:Dental Implantation, Endosseous / Q000295:instrumentation*; D015921:Dental Implants; D003762:Dental Instruments / Q000592:standards*; D017268:Dental Prosthesis Retention; D015588:Observer Variation; D014086:Tooth Mobility / Q000175:diagnosis*
D015921:Dental Implants