How much should the prophy angle flare under the sulcus?

The correct answer indicates that a flare of 1-2mm is necessary under the sulcus when using a prophy angle. This slight flare is essential for effective cleaning and polishing of the tooth surfaces, particularly in the interdental areas and along the gumline.

A flare allows the prophy cup to adapt better to the contours of the tooth, ensuring that plaque and debris are adequately removed from areas that are otherwise difficult to reach. The specified range of 1-2mm strikes a balance between effective penetration into the sulcus and minimizing the risk of damaging the gingival tissue. This consideration is vital for maintaining oral health while preventing potential irritation or injury to the soft tissues.

By applying the correct amount of flare, dental professionals can enhance their cleaning techniques, leading to better patient outcomes in both aesthetics and overall dental hygiene.