Читать книгу Periodontics - Fernando Suarez - Страница 91

The furcation morphology has been a subject of interest for multitude of investigations, including research evaluating the effectiveness of mechanical instrumentation.^66,67 Bower noted that 81% of the furcations had a diameter less than 1 mm, while 58% were less than 0.75 mm in diameter.⁶⁶ At the time, such findings were clinically relevant because the diameter of tested curettes (ie, Gracey, Columbia, and McCall) had a blade face width ranging between 0.75 and 1.1 mm, resulting in limitations for mechanical instrumentation. Similarly, Chiu et al reported that 49% of furcation entrance dimensions were equal to or less than 0.75 mm, which reinforced the need to use narrow instruments and ultrasonic devices with narrow tips for the management of furcation defects.⁶⁷