[Ingredient] What are the differences between ProRoot MTA and OrthoMTA?
- Particale size : 2 ㎛. Because it contains no coarse particles, OrthoMTA flows well into the narrow canal system and will seal the dentinal tubules effectively.
- Expansion coefficient : 0.08, there is no expansion or shrinkage after hardening.
Over expansion of canal grafting material will elevate the possibility of root fracture.
- Flow rate : OrthoMTA is the first hydraulic orthograde canal grafting material satisfying the ISO 6876 standard
- Film thickness : OrthoMTA is the first and the only hydraulic canal grafting material satisfying the ISO 6876 standard
- Appilication : OrthoMTA is an orthograde canal grafting material
- Instruction : OrthoMTA is individually packed in 0.2g vial so it is very convenient and there is no waste.
- Basic materials : The basic materials of OrthoMTA are highly purified reagents so that impurities are excluded. The Basic material of Pro-rootMTA is white portland cement according to manufacturer's catalog.
OrthoMTA is the first and the only patented hydraulic orthograde canal grafting material in the world. Its physiochemical properties, stability, handling and price are definitely superior to Proroot MTA.
[Ingredient] What is the difference between OrthoMTA and white Portland cement?
Over expansion of canal filling material will increase the possibility of root fracture.
- Industrial waste is used in the manufacturing process for white portland cement. So carcinogenic heavy metal contents such as Cr6+(chronium ion) cyanide compound cannot be excluded.
[Setting reaction] Are the setting reactions of OrthoMTA affected by acidic conditions?
Routine application of EDTA may cause root weakening and prevent MTA from hardening.
[Setting reaction] Does an acidic condition after hardening affect OrthoMTA?
Apical inflammation will not affect the setting of OrthoMTA.
Recurrent inflammation of a treated tooth cannot dissolve OrthoMTA which has already set.
As a result of in vitro experiments, it was revealed that sulfuric or hydrochloric acid could not dissolve hardened
OrthoMTA in tube.
[Setting reaction] What is the setting time for OrthoMTA?
Physical Properties of New MTA
The first phase is an initial incomplete setting and the second phase is final setting which means a complete chemical setting.
A short setting time is not good for orthograde filling but is desirable for retrograde filling.
Currently BioMTA is developing a RetroMTA which has a short setting time of within 3 min.
[Hardening reaction] Does OrthoMTA make a chemical bonding with the dentinal wall?
There are two kinds of bonding:
1.Mechanical bonding between the irregular dentinal wall and interfacial layer of OrthoMTA.
2.Chemical bonding between the interfacial layer and the dentinal tubules.
In many research papers show that a hydroxyapatite interfacial layer forms between dentin and MTA surface.
[Grafting method] What is the grafting method with existing instruments?
It is very easy with existing instruments, an amalgam carrier can be used to deliver hydrated MTA into the canal chamber, and a #15 spreader can be used to condense MTA into the MAF length. However,it takes too long to fill and increases the possibility of saliva contamination. Some research results show mucoplysaccaride in saliva prevents MTA from setting.
[Grafting method] Is it possible to graft the root canal if there is a significant exudate?
It is important to diagnose if the exudates is of an inflammatory or infective nature.
In case of white yellowish and foul smelling exudate, a thorough calcium hydroxide irrigation and follow-up check will be required.
[Grafting method] Are there any problems in case of overfilling?
There are no special problems. In fact overfilling with MTA will the change acidity
of the apical region and it will establish a more desirable micro-environment for periodontal
Pictures show the forming of cementum and new bone in the contact region with MTA
Recently many researchers conclude that MTA is a Bioactive material.
[Grafting method] Are there any problems in case of underfilling?
Unsealed gaps or spaces provide a bacterial growth environment and results in the failure of endodontic treatment.
[Grafting method] What is the advantage of canal enlargement of apical areas when the orthograde grafting method is pr
Lateral and vertical condensing technique cannot guarantee the perfect apical sealing because gutta-percha will shrink after sealing and degradation of it will follow. Also, apical areas cannot be thoroughly irrigated through a conventional enlargement technique.
A cylindrical space formation in the apical 5mm area(diameter: 0.30~0.35mm) provides a complete debridement. A 0.29 diameter needle reaches more effectively to the apex and it makes thorough irrigation in apical areas. In addition, a cylindrical space in the apical 5mm area allows a jamming effect more easily.
[Grafting method] How can a canal more than MAF #40 or open apex be filled?
A slight overfilling is acceptable, however, it requires care,
to the inferior alveolar nerve canal.
[Grafting method] what is the recommended water/power ratio?
After grafting the canal completely, the oral environment supplies sufficient water required to set OrthoMTA.
[Grafting method] Can the left over OrthoMTA be re-used?
[Grafting method] How can OrthoMTA be mixed with water?
[Grafting method] Is it possible to completely graft the curved canal with OrthoMTA?
Yes, it is possible, keeping the OrthoMTA condenser #25 to the definitive working length
ensures complete grafting.
[Grafting method] It seems possibility that the dentin walls are removed by using OrthoMTA compactor.
That is the point differentiated OrthoMTA compacter from other instruments made by Dentsply or Sybron Endo company.
Therefore, canal preparation at apex 5mm area can be achieved efficiently not removing the dentin walls.
[Grafting method] It seems there is a possibility that the dentin walls are removed by using the OrthoMTA compactor.
That is the point which differentiates the OrthoMTA compacter from other instruments made by Dentsply or
the Sybron Endo company.
Therefore, canal preparation at apical 5mm area can be achieved efficiently without removing the dentin walls.
[Grafting method] Doesn't the modified technique by using guttapercha cause a problem?
unfilled area with gutterpercha.
[Grafting method] How many times can the OrthoMTA spreader and condensor be used to
We recommend 10 or 15 times to avoid the risk of instrument breakage.
[Obturation] What is the difference between using condensing and compacting obturation devices?
- When using an OrthoMTA Condenser, you have to use a low-speed hand piece.
- When using an OrthoMTA Compacter, you have to use a vertical vibrating hand piece.
[Obturation] What is the role of blood when setting OrthoMTA?
Based on the research, there's no particular influence.
[Obturation] When the dentinal of the root is perforated, what is optimum grafting thickness of OrthoMTA ?
then condense OrthoMTA with a depth more than 1mm.
But, because the masticatory force is not applied to the perforated area, this means that the thickness is not important.
[Obturation] How can I overcome the problem if the OrthoMTA sets abruptly during obturation procedure?
If you don't have an ultrasonic endodontic tip, an endodontic file can be used as an alternative.
Grasp the file with the needle holder, and vibrate it with an ultrasonic scaler.
[Obturation] What is the cause of postoperative pain and what is the solution for it?
So, you have to administer anesthesia first, remove the moisture from the root canal with a paper point,
and then perform the obturation procedure.
[Obturation] How long it will take to obturate a canal?
[Obturation] What is the optimum time for obturation?
[Obturation] Is it essential to dry moisture in the root canal?
Operation time will be reduced in dry root canal conditions.
[Obturation] Is it possible to use OrthoMTA as a retrograde grafting material?
[Obturation] Are there any particular devices to use when retrograde grafting?
[Endodontic retreatment] Is it sufficient to perform an apicoectomy without retrograde after orthgrade MTA grafting?
[Endodontic retreatment] Why is the radiopacity of OrthoMTA sometimes not clear.
However, Ortho-MTA will show enough radiopaque image when it is well compacted.
Native ortho-MTA itself is not radiopaque at all (it does not contain contrast materials).
The radiolucent region on a radiograph does not mean a void that is not filled in the canal,
it may just be that OrthoMTA has not been mixed homogeneously.
[Radiography] Is there a method to detect underfilling?
[Radiography] What is the influence of an acidic solution?
When there are reminants of acidic solution, a delay in the setting of OrthoMTA will occur.
Thus, you should remove all remnants of acidic material by thorough irrigation.
[Radiography] What is the appropriate timing for post preparation?
[Radiography] What's the minimum grafting length of OrthoMTA needed for post preparation?
Actually, researchers have found that MTA showed excellent apical sealing properties.
Thus it is sufficient to fill the remainder of the apical 5mm.
[Radiography] What's the appropriate timing for post and core preparation?
[Radiography] Will intra-canal moisture interfere with the resin bonding in the case of resin core?
to wet bonding after Orthograde grafting with OrthoMTA.
[Radiography] How much will patients have to pay for OrthoMTA grafting?
technology is protected in the USA and Japan but not in Korea unless it is specifically protected by the law of the patent.
We have a very unreasonable medical pricing system for endodontic treatment in Korea, which makes the endodontic treatment environment worse. A dental doctor should save patients teeth wherever possible, but this pricing environment makes it very difficult.