A novel instrument to determine pulp proximity.
The aim was to determine whether extracted teeth could be used to test the Prepometer instrument, which indicates pulp proximity with green/amber/red light emitting diodes. Third molars were reduced to a plane in dentine and Prepometer readings made. Dentine was removed in 0.5 mm increments and readings made until only lights 9 or 10 (red) showed. The teeth were sectioned and the dentine thickness measured. Analysis permitted construction of a highly significant predictor-model (p < 0.01), the red/amber light boundary coinciding with a dentine thickness of 2.4 mm. The Prepometer was consistent in predicting pulp proximity but was more sensitive than specified.
Purton
David G
DG
david.purton@dent.otago.ac.nz
Chandler
Nicholas P
NP
Monteith
Brian D
BD
Qualtrough
Alison J
AJ
D003762:Dental Instruments; D003782:Dental Pulp / Q000033:anatomy & histology*; D003804:Dentin / Q000033:anatomy & histology*; D003806:Dentin Permeability; D017097:Electric Impedance; D006801:Humans; D008027:Light; D008964:Molar, Third; D019231:Tooth Preparation, Prosthodontic; D055815:Young Adult