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Technical assessment of WHO-621 periodontal probe made in Brazil

By Gisela Estela Rapp, Aryon de Almeida Barbosa Junior, Ary Jos?? Dias Mendes, Ana Carolina Fragoso Motta, Mariana Ayres de Almeida Bi??o and Ricardo Vieira Garcia


This study technically assessed the WHO-621 periodontal probe made in Brazil as well as its dimensional and weight stability after sterilization. The following characteristics were measured in one hundred (100) new probes: diameter and linear area of tip sphere and beginning and ending references of its colored band by means of indirect computerized morphometric method, and weight, by means of a digital balance within 0.01 mm precision. Fifty (50) probes underwent one hundred (100) cycles of either steam or heat sterilization. The WHO-621 Trinity probe showed mean values of 0.66 mm in its longitudinal and 0.54 mm in its transversal sphere diameters; 0.40 mm2 in its sphere linear area; 3.56 mm and 5.76 mm for the beginning and ending of the colored band, respectively. Its mean weight was 10.12 g with small variation. Some of the measurements showed significant changes after both sterilization procedures. Neither of the sterilization methods showed to be more advantageous (Student???s t-test, p = 0.05

Topics: WHO-621 periodontal probe, Periodontal instrumentation, Periodontal epidemiology
Publisher: Dental Foundation of Ribeirao Preto
Year: 2002
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