1) Why the CVDentus name?
CVD comes from the technology of diamond deposition, called Chemical Vapor Deposition. The term "Dent" relates to the dentistry and "us" to ultrasound.
2) If the ultrasonic CVD diamond tips are so durable, why are there no CVD diamond tips for high-speed rotary system?
The CVD diamond tips for high-speed rotary system exist. They were developed before the CVDentus tips. However, they are excessively durable, which limits its marketing process. They may be put in the market for specific uses, due to their high capacity to cut very hard materials.
3) Why weren't ultrasonic tips extensively used in cavity preparation before the CVDentus tips?
Because the pre-existent tips did not bear the action of the ultrasound to cut hard materials. Tips of steel or titanium wear away rapidly because they have smaller hardness than enamel and dentine. Tips with diamond powder agglutinated on the active tip, even the ones with the best agglutination technologies, have low durability. This limits its use strictly to small cases, or incipient decays. These tips are expensive and the cost benefit ratio is very low.
4) Why do the ultrasonic CVDentus tips bear the action of the ultrasound during the cut of hard materials?
Because they have in their active tip a thick layer, freestanding, of pure diamond, without any agglutinative metal. Besides the thick and extremely resistant diamond layer, it has a high adherence to the metallic stem. The technology to obtain this CVD diamond highly adherent to bear the ultrasound action during the cut of hard materials was entirely developed in Brazil, starting from research done at the National Institute of Space Research.
5) If the ultrasound brings so many advantages to the cavity preparation, why wasn't it used before?
The main reason was exactly the inexistence of an appropriate tool. The ultrasound had already been used for the cavity preparation during the decade of 1950, using tools of steel, with the aid of an aluminum oxide powder to abrade the tooth. These tools turned the process very complicated (tips were consumes rapidly, there was excess of liquids to be sucked, there was the need to frequently readjust the ultrasound frequency, efficient cut of the enamel but little efficiency in the dentine, etc.). Despite all of the advantages of the ultrasonic dentistry already verified and proven at that time, the difficulties in the use turned it not viable. The CVDentus tips are the appropriate tools, which enable the ultrasonic dentistry, eliminating all of the disadvantages and evidencing the advantages already discovered in the years 1950.
6) Why is it painless?
Absolute certainty about the reasons of the much higher pain threshold are not still totally established. The fact is that this larger pain threshold is evident. Some scientifically proven indications already exist.
The first is the minimum heating of the tooth, which stays at the temperature of the cooling water. The water refrigerates the hand piece and arrives to the tooth at a comfortable temperature, close to the body temperature. This avoids the thermal shock and prevents pain.
The second is the verification that the movement of the ultrasound is poorly transferred through the dentinal tubules, leaving intact the dentine-pulp complex, while in the high-speed rotation, for instance, the pulp interface is sucked to the interior of the tubules. The fact of the dentine-pulp complex to stay intact it is a high indicative for the absence of pain.
The third is the form of use. The CVDentus tips must be used with a very light pressure, which may avoid the mechanical effort capable to induce pain. This is a characteristic of the use by the dentist. The dentist beginners in the technique tell cases of sensibility, but as soon as they improve and reduce the pressure of use they get a drastic reduction of the cases of sensibility.
7) Does exist some analgesia process produced by the ultrasound?
Some dentists ask about some analgesia process, due to the fact that they frequently observe areas that were sensitive in a first attempt and stop being sensitive after some time of use. It does not exist any scientific evidence that proves any analgesia processes. In these cases the most probable is that the low pressure in the use is responsible for the absence of pain.
8) Is the anesthesia use always dispensable?
No, the use of the ultrasonic CVDentus tips has a much higher pain threshold, but they do not anesthetize. Different patients have different sensibilities. A lot of times the use of the ultrasound is quite painless, but other coadjuvant procedures cause pain, so that the anesthesia may be necessary. A typical example is the surprising removal of a deep old restoration with ultrasound, without any pain. However, drying the cavity with a strong air jet causes sharp pain. In this case you should release the air gradually to avoid the thermal shock that causes pain. Independent of the situation, the use of anesthesia decreases plenty and, many times, only the use of a topical anesthetic solves the problem.
9) How long do the CVDentus tips last?
The CVDentus tips are intrinsically durable, but their durability is user dependent. The main form of wear and tear is the diamond delaminating, which happens in the use with excessive pressure in the cut of hard materials. Therefore, the secret for the durability is the use with very light pressure, always moving the tip to avoid pressing it. With the correct use, the tips cut well and they have a very long life, about 30 times larger than conventional ones.
10) If the cut efficiency and the durability of the CVDentus tips depend on good use of technique, how can I learn this technique?
The use the ultrasonic tips in the same way you use the high-speed rotary system is a disappointing experience. It is fundamental that you become conscious of the need of learning how to use. On the other hand, the technique is very simple and the learning can be made by the self-training. Visit in this page to better understand the technique. Eventually, if necessary, the professional can enroll for a specialization course.
11) Which are the handling differences among the ultrasonic CVDentus tips and the high-speed rotary system?
The main difference is the pressure. For the use of the ultrasound the professional must minimize the pressure to be applied. The pressure impedes the cut and reduces the useful life of the tips, besides it could cause discomfort to the patient. The correct use is with minimum pressure. The professional should just drive the tip. The ultrasound makes the cut work, not you.
The second difference is the need for movement. The ultrasonic CVDentus tips cut with better efficiency if they are maintained in constant movement, always in contact with the material to be cut. A detail is that this movement should be always parallel to the surface that is being cut.
Other differences are just detail if these two handling differences are understood.
12) Do the ultrasonic CVDentus tips came to substitute the high-speed rotary system?
The ultrasonic CVDentus tips have a high use capacity and a great potential of substitution of the rotary burrs in a great number of procedures, but they do not come to substitute or to compete, they come to compose. The modern professional will have both techniques at his disposal. One with high cut potential as the high-speed rotary system, where in fact that is necessary, and one of larger precision as the ultrasonic CVDentus tips, when that is necessary. The limit of use of one or other technique is the subject to be discussed.
13) Are The CVDentus tips used just for incipient decays?
On the contrary, CVDentus tips can treat all of the classes of Black, fissures, tunnel accesses, vertical and horizontal slot, etc. In other words, all of the types of decays.
14) Which is the limit of use of the ultrasonic CVDentus tips?
The CVDentus tips can be used with great efficiency and advantages in most of the cavity preparations of the daily clinical work. They are not suitable only in situations in that great amounts of sound material need to be removed, as in prosthetic preparations.
15) Do the CVDentus tips cut too slowly? Does it turn the work too slow?
In the comparison of cut speed the CVDentus tips have about a quarter of the cut speed of high-speed rotary system, which is much smaller. However, efficiency is not synonymous of cut speed. The set of properties of the ultrasonic CVDentus tips turns the work very efficient, in spite of the low cut speed. Efficiency is the simplification of procedures. Efficiency is to just do the necessary, preserving healthy structures, giving comfort to the patient and to the professional. Efficiency is obtained by the correct use of the tips and with a vision of preservation of the dental structure. Several professionals' evaluations indicate a capacity of service same or larger along a day of work, with the use of the CVDentus tips in the great majority of the cases. With this efficiency, the low cut speed is transformed in an advantage, which is the high precision.
16) Why to remove old restorations with the ultrasonic CVDentus tips?
The first impression is that it turns slow to remove old restorations, such as amalgamates or composite resins . With the ultrasound, however, the practice shows that in spite of the cut of these materials to be relatively slow, they unfix by action of the ultrasonic vibration before they be eroded. This fact turns the removal efficient. Above and beyond, the main reason to do this removal with ultrasound is the extreme capacity to preserve intact the original cavity, without enlarging it during the removal of the old restoration. Since the teeth longevity is a fact, the dental structures preservation is the primordial search. Even in cases of very large restorations, you can decide to begin the removal of restoring material volume with the high rotation, but it is fundamental that close to the walls the removal are made with the ultrasound.
17) Can the CVDentus tips be used in any ultrasound equipment?
In principle yes, but there are some practical limitations. The tips were projected to operate in ultrasound between 25.000 and 32.000 Hz. For ultrasound equipments that work in these frequencies, it is possible to project an adapter between the ultrasound equipment and the tips. There are already adapters for many of the piezoelectric ultrasound equipments that exists in the market.
The magneto-strictive equipments (Cavitron type) also work well with the tips, but there is an intrinsic difficulty to make the adaptation. These equipments avoid the use of a torch wrench to change tips. Therefore, no adapters are offered for these equipments.
18) Can I use the ultrasound equipment that I have at the clinic?
Yes, if there is an adapter for your equipment. If you have a piezoelectric ultrasound equipment there is a great probability that exist an adapter already available. Consult in "Products" for the available adapters.
19) To use the ultrasound equipment of the clinic, what do I need?
You need to acquire an appropriate adapter for your equipment and the CVDentus tips.
20) Is the ultrasound equipment that I have weaker than specified equipment for the CVDentus tips?
There is a standard power for most ultrasound equipment specified for tartar removal. The manufacturers supply equipments with 8 to 10 W of maximum ultrasound power. Most ultrasound equipments are inside of the specifications for use of the CVDentus tips.
21) If accidentally, the CVDentus tip leans on the tongue or cheek of the patient, will it
cut the tissue?
No, the ultrasonic CVDentus tips do not cut the soft tissues.
22) Does the cost of the treatment increase?
Does not exist any reason to increase the treatment cost. Although the initial cost of the CVDentus tips is higher, its durability guarantees a larger cost/benefit ratio. The increase of the cost can be used according to your marketing strategy, in function of the best quality of the treatment offered.
