There are two common clinical situations where this problem occurs

One is that when a curved or angled tip ADAPTS to the posterior tooth, its position is curved toward the tooth. Another case is that when the insert is fit and parallel to the proximal surface, and then in the absence of rotating sweep to the buccal or lingual surface area, resulting in contact with the surface instead of the side of the insert now. In the second case, when an insert is adjusted to close to the proximal surface, then sweep the cheek or tongue surface, making the point contact instead of rotating the top to use the inserted side. The tip of the technical column for oral hygiene in February 2009, by Anna m. Pattison,RDH,MS, MS, provides a graphical example of the root injury caused by repeated treatment of the ultrasound dental supplies insertion point.
Error 4: adaptation
There are two main ways that ultrasound can adapt to the teeth. Most of the time, the tip should be positioned so that it is parallel to the root surface being processed. Its position is like a periodontal probe to evaluate the pockets around the periodontal canal or the entire tooth. This technique is the only unrestricted method of obtaining soft tissue attachment. This is the best strategy for achieving comprehensive coverage of the most challenging areas of the tooth: line corners, proximal Outlines, and deeper periodontal pockets.
The second kind of adaptation is the positioning tip, so the terminal part points to the space between the teeth, parallel to the bite plane. This will insert the tip of the terminal part perpendicular to the long axis of the tooth, while the handle is more parallel. This adaptation is an ideal place of work and immediate area of contact, where calculus is often maintained. In healthy oral cavity, full nipple is filled with shallow gully of embrUNK space, and the near surface of this adaptation can work. However, it has no effect on the therapeutic line Angle or face or tongue. Its use on these surfaces is usually in the position of the tooth.
All the effective treatment of tooth surface need to be adapted to methods: vertical direction (such as probe), parallel to the tip of the root, and root and exposed root surface during recession, and perpendicular to the long axis of the horizontal contact with the long axis. For periodontal patients, most treatment time should be in the pocket, like a probe. To sum up error 4, the question can be:
1. Work cannot be done in two adaptive ways.
2. Use vertical adjustment where there is no effect.
3. In most treatment processes, the project cannot be used similar to that of the prostate.
Error number 5: not enough strokes
Another common mistake is the failure to adequately cover the root surface with overlapping, multidirectional strokes that require thorough treatment. The narrow width of the physical contact between the ultrasonic needle point and the tooth surface makes the effective area of the tip smaller. The best treatment is to reach the bottom surface of every square millimeter of the gum. The advantage of using ultrasound is that the stroke is lighter, the action is faster, there is no need to worry, and there is no need for a hand instrument. Effective ultrasound treatment still needs to be erased multiple times on any given surface, rather than being swept from one contact area to the next. Ultrasound insertion therapy should not be confused with mouth irrigation. In a fluid environment, the high frequency vibrations of the tip cause turbulence and the microflow of sound waves, thus destroying the biofilm, rather than simply cleaning the movement, because its tip is moving on the surface.
Ltrasonic dental equipment is an important part of oral health treatment. The most effective way to do this is to be careful and attentive to the technology, especially the cutting edge of the insertion, and the complete treatment of the root surface.