Comparative reproducibility of proximal probing depth using electronic pressure‐controlled and hand probing

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Abstract
This investigation assessed the effect of an electronic pressure-sensitive probe on the reproducibility of probing-depth measurement. Clinical measurements were made at the mesial and distal aspects of all teeth from the buccal and palatal or lingual aspects. Probing was carried out either in a conventional manner using gentle pressure referred to as hand probing or using an electronic pressure-sensitive probe set at 25 g and referred to as pressure-controlled probing. Probing-depth recordings were repeated for one randomly selected quadrant in each subject with random application of the 4 different combinations of pressure-controlled and hand probing. A total of 2584 replicate pairs of probing depth measurements were recorded on 4 proximal surfaces in 646 teeth in 100 adult subjects. The majority (98%) of all repeated measurements were within 1 mm of the initial values. The highest levels of agreement resulted when the same probing method was used at both examinations with electronic pressure-controlled probing being superior to hand probing regardless of tooth position or site. Duplicate measurements recorded with combinations of hand and pressure-controlled probing showed significant systematic bias towards shallower pocket depths with electronic pressure-controlled probing.

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