Influence of a polishing brush equipped with an air scaler on the surface roughness of artificial tooth substrates

Shimizu Chizuko, Sakai Masako, Kaori Oshio, Oka Shigeki, Yagi Hiroaki, Takamizawa Toshiki, Miyazaki Masashi, Ito Koichi

doi:10.2329/perio.53.154

Recently, a polishing brush equipped with an air scaler was introduced as an alternative to rotating instruments for Professional Mechanical Tooth Cleaning (PMTC). There is a possibility of this type of brush having an adverse effect on the tooth surface after PMTC, however, this has not yet to been confirmed. The purpose of this study was to investigate the influence of a polishing brush for PMTC equipped with an air scaler on the surface roughness of an artificial tooth substrate. In this study, stainless steel blocks with almost the same degree of hardness as human enamel and acrylic blocks with almost the same degree of hardness as human dentin were used as alternative human tooth substrates. Specimens were polished under water or with prophylactic polishing pastes (RDA #40 or #250) for 5, 10 or 15 sec, using a polishing brush equipped with an air scaler. After the PMTC, the surface roughness values (Ra) were measured with a profilometer and scanning electron microscopic observation was carried out. From the results of the surface roughness measurements, a tendency towards increase of the Ra values in the #250 group was recognized as compared with that in the other groups. The Ra values of acrylic specimens increased significantly as compared with those of the stainless steel specimens, furthermore, the Ra values of the acrylic specimens tended to increase with prolonged increasing polishing time. From the results of SEM observations, it appeared that the actylic #250 group showed a rougher surface as compared to the other groups. The results of this study suggest that the use of a polishing brush equipped with an air scaler had no adverse effects on the tooth surface texture, as long as it was used with water. However, care should be taken when using this type of polishing brush with prophylactic polishing pastes before their clinical use in clinical practice.<BR>Nihon Shishubyo Gakkai Kaishi (J Jpn Soc Periodontol) 53(2):154-162, 2011.

Influence of a polishing brush equipped with an air scaler on the surface roughness of artificial tooth substrates

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