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Trisha E. O`Hehir, RDH, author of the article, "Full-Mouth Disinfection" (RDH, March 2000) observed very impressive results with a full-mouth scaling procedure. She indicated that - because treatment was provided in an oral surgeon`s office - the ultrasonic scaler, three-way syringe, and traditional, contaminated dental unit waterlines (DUWLs) were not available for use.

Dear RDH:

Trisha E. O`Hehir, RDH, author of the article, "Full-Mouth Disinfection" (RDH, March 2000) observed very impressive results with a full-mouth scaling procedure. She indicated that - because treatment was provided in an oral surgeon`s office - the ultrasonic scaler, three-way syringe, and traditional, contaminated dental unit waterlines (DUWLs) were not available for use.

Though Ms. O`Hehir offered possible reasons for the favorable treatment outcomes that were observed, she did not make the link between her not using the above-mentioned devices and the positive effects that it may have had on her observed periodontal therapeutic results.

We have been providing periodontal therapy for over four years in the absence of any contaminated DUWLs and without the use of ultrasonic scalers. Our results have been overwhelmingly positive, even beyond those noted by Ms. O`Hehir. We encourage all hygienists to visit the www.perioaccess.com Web site to learn more about the substantial positive impact a few minor clinical changes can make in their treatment outcomes.

George K. Merijohn, DDS

San Francisco, California

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