repair composite resin bonding

Sticky crown (especially porcelain crowns), fixed denture adhesive, inlays,
Veneer, indirect method to complete resin restorations.
Usually a paste - paste formulations for bonding metal and opaque porcelain restorations.
Dual-cure: start, and then continue with chemically cured,
Suitable transparent adhesive restorations such as crowns, indirect method finished resin restorations.
Light-curing: Single component. portable dental unit Curing may be used alone, or light-cured matrix
Dual curing catalyst added. These products use the object consistent with the dual-cure.
In order to obtain the best physical properties, operation is the key.
Light-curing and dual-curing materials, light is a must,
After 10 minutes the polymerization generally get the best performance.
Some brands of adhesive material handling combined with dentin bonding agent,
Increases the complexity of clinical use.
These materials are widely used for bonding repair techniques, especially bonding ceramic restorations
Failure occurs and the material itself and operate in addition to technical defects, the
 Cyclic stress fatigue is a factor,
It is reported that the average life expectancy chemical curing repair of 8 years
Material itself is not much problem, endo motor the individual patient doctors and nurses have allergy symptoms,
Especially when using dentin bonding systems should avoid contact with the skin. n place is not complete, polymerization shrinkage and consequent leakage will be on micro-
Pulp causing pathological damage. The formation of micro-leakage can cause allergies and tooth repair failed.
Binding adhesive used to reduce the incidence of micro-leakage
[Disadvantages]
Advantages - High strength, low solubility, and enamel, dentin,
Alloy and porcelain restorations high surface adhesion properties (mechanical or chemical bonding).
Disadvantages - operating techniques sensitivity; seated difficulties; film thickness higher.
Pulp stimulation; micro-leakage; remove excess adhesive material more difficult.
In the adhesive porcelain veneers, composite resin inlays, crowns and other restorations good light transmission properties when
Using different colors, transparent, translucent or opaque,
Color coordinated with the prosthesis resin adhesive material is required to achieve beautiful.
All-ceramic restorations need to pass it with the adhesive material adhesive tooth tissues
Together to obtain strength, the hydrofluoric acid treatment to obtain ceramic adhesive side mechanical retention,
Then silane for further chemical processing.
The composite resin restorations complete curing of the adhesive the basic requirements.
Using light-cured resin adhesive material, the thickness should not exceed porcelain 1.5mm,
So as to ensure sufficient light to enter. If you use masking agents or porcelain veneers too thick,
Manufacturers recommend using a dual dual-cure resin paste adhesive material.
Resin adhesive material widely used for special aesthetic restoration of the adhesive,
The adhesive bridge dental cement is preferred. In addition to the lack of retention,
 Shedding fixed prosthesis adhesive, resin adhesive material can also be used to achieve the purpose.
Resin bonding material application more troublesome, these materials can not be completely avoided
Pulp irritation. Have dental products better retention is not a conventional prosthesis
Requires the use of resin-bonded materials.
Resin bonding material must be used with the adhesive,
 Avoid shrinkage of the resin and tooth structure caused fissures produced.

dental instruments and medical personnel microbial

 dental instruments and medical personnel microbial contamination status of iatrogenic infection

    1.1 Microbial contamination of dental instruments dental instruments in addition to being the patient's blood, saliva and other oral secretions pollution, the environment may be dental, medical staff hand contamination. HBV, HCV, HIV and other viruses dental needle is not only present in the blood, which can be discharged from the saliva contaminated dental instruments. Our hospital dental equipment HBsAg contamination rate fluctuations on 5% to 30%, urban individual dental clinic equipment on HBsAg positive rate of 37%, rural clinics dental equipment on HBsAg positive rate of 62%. Dental handpiece contamination of up to 5 × 10 4 ~ 5 × 10 6 cfu/cm2. The findings microbial contamination of dental instruments three major categories namely oral colonization flora, gastrointestinal pathogens such as Salmonella bacteria group, Escherichia coli group, Shigella dysentery bacteria, Pseudomonas group and fungi, times but also have paid close attention to blood-borne disease pathogens.

    1.2 medical personnel dental supply companies iatrogenic infection status dental instruments serious pollution not only endanger the patient, it also endangers the medical staff. Dental Clinic medical staff is one of many facing the unknown HBV, HCV, HIV infection or pathogen carriers come to treatment, their blood, saliva may contain pathogenic factor, so that patients and medical staff have the chance of infection. According to the medical staff of cold Taijun population survey found that hospital medical staff serum HBsAg positive rate of the general population is 3 to 6 times, and dental medical staff serum HBsAg positive rate is four times the other department staff. Foreign existing clinical data show that dentists HBV, dental chair HCV, HIV infection problems are present occupation. According to Japanese scholars Mochizuki widely reported that the Japanese dental practitioner HBV infection rate was 35.9%. Practicing dentist in the United States are also infected with HIV was reported.

with regard to all-ceramic dental injection matter how much you know

Now people who do all-ceramic dental increasingly accomplished, because all-ceramic dental porcelain teeth with metal unmatched superior repair effect. So many friends there were dental machine unsightly teeth

Friends want to try all-ceramic dental brought new U.S. dental effects. But often we do exactly the porcelain teeth to ignore the relevant considerations affect the results. What about

All-ceramic dental precautions are what it?


        According to oral experts say, all-ceramic dental considerations mainly in the following three aspects:


        First, eat soft food: the beginning should eat soft foods wear, it is best not to use the all-ceramic dental Kenyinggutou, eating crabs and other food. This is due to raw material reasons,

Most of the original eco-ceramic dental force to a limited extent, once exceeding this intensity, it is easy to damage the teeth, and even affect its life.


        Followed by wash their fiber optic handpiece teeth cleaning: all-ceramic dental abutment junction with easy to gather plaque and tartar formation, attention should be clean, available floss between the teeth, and regularly

To the hospital for examination, cleaning teeth.


        Finally, anti-periodontal: anterior aspect always be careful not to bump them to go with a hard object, or a long day of porcelain breakage may occur. Porcelain teeth generally do not change color

To ensure the health gaps between teeth, with particular attention to the control of periodontitis, or dentures can not afford to really end up on the bad teeth fall out.

zirconia all-ceramic dental Scope fine list

 Zirconia all-ceramic dental restoration is porcelain teeth in an excellent view of zirconia all-ceramic dental advantages, many of my friends want to do U.S. dental zirconia all-ceramic dental

. But as a means of repair, ultrasonic scaler zirconia all-ceramic dental also has strict scope, then zirconia all-ceramic dental scope, what does?


        Zirconia is a high temperature, wear-resistant, corrosion-resistant inorganic non-metallic materials. Its melting point up to 2700 degrees Celsius, the best performance is the nature of fire

One of the materials. Its thermal conductivity is poor, but the conductivity is very strong, strong ability to resist, even if heated to over 1900 degrees Celsius will not work with molten aluminum, iron, nickel

, Platinum and other metals, dental tools silicates, and play a role in acidic slag. His toughness is much larger than other known non-metallic porcelain.


        About zirconia all-ceramic dental scope, experts pointed out include the following aspects:


        Discolored teeth, common yellow teeth, perfect repair tetracycline, correcting individual missing teeth, broken teeth, teeth too wide, enamel hypoplasia, malformations and other types of teeth

Branch diseases can be used zirconia all-ceramic dental.


        In addition, zirconia all-ceramic dental appearance, the perfect solution to patients with severe tetracycline teeth beauty needs; zirconia all-ceramic dental because most prominent feature is not

Metal within the crown, so the teeth, dental chair good transparency, excellent gloss, more effective way to avoid metal allergies and other problems. In addition, he has a good enough masking capabilities, superior toughness so

No matter how your teeth are no worries; zirconia all-ceramic dental appearance and vivid color, strong wear resistance, good biocompatibility, does not stimulate the oral mucosa, easy to clean.

the production of all-ceramic dental materials which have

Yes called all-ceramic dental cosmetic teeth in the classic, is the darling of many stars beautiful teeth. Naturally, this high-tech all-ceramic dental porcelain teeth, its price is not cheap.

Investigate its reason lies in the expensive all-ceramic dental materials. The material determines the price of porcelain teeth. So all-ceramic dental materials are what it?


        About all-ceramic dental ultrasonic scaler materials, experts say, all-ceramic dental materials are distributed such, the outermost layer of high-temperature ceramics for the space shuttle, the inner layer is

Thermal expansion synchronized gold tooth sets, porcelain teeth are many steps of the production process, is set high, casting, bonding technologies such as high-tech products.


        As cosmetic dentistry in the dental chair classic, all-ceramic dental lifelike appearance beautiful, rugged wear, mimicking the natural color of teeth, biocompatibility, do not stimulate the oral group

Weaving, easy to clean, that is able to restore the function of the teeth, but also the role of beauty. This is due to all-ceramic dental materials Reflected.


        All-ceramic dental materials, dental tools with its production are closely related. First, you want to grind my teeth cone-shaped (when necessary go pulp), casting an alloy jacket crown (called crown

Nuclear), on top of this will bring good color deposited on a ceramic tooth shape carved dresser, put sintering furnace, wearing abutments.

dental machine status abroad

We developed countries tableting machine with compression technology gap is widening, high yield, airtight,

modular, automated, large-scale and advanced

Detection technology is the most important foreign tableting machine technology development direction.

Advanced tableting machine base in Europe, such as Germany FETTE, KORSCH, UK MANESTY, Billy

When COURTOY, USA STOKES so on. resin teeth High degree of automation of its products, in compliance with FDA

requirements and 21CFRPART11 requirements.

(1) high speed, high yield. High speed and high output was tableting machine manufacturers over the years has

always been the goal, the main tableting machine manufacturers already have hourly output

Reach 1 million tableting machine. If Manestry produced Xpress700 type tableting machine yield amounted to

1,000,000; Korsch XL800 type produced by tableting machine

Maximum output reached 1.02 million / h; Courtoy produced ModulD type tableting machine maximum output

reached 1.07 million / h; Fette 4090i produced the highest type tableting machine

Production reached 1.5 million / h. Its production is much higher than domestic production of tablet presses,

tablet confidential domestic production to catch up in terms of speed than abroad, you need to create a

tabletting machine design

New processing technology, automatic control and other aspects have made great progress. Tabletting machine

(2) tabletting process link airtight and flow, logistics isolation. Foreign tableting machine input and

output is very good sealing, to minimize cross-contamination

. Granules for tableting barrel and dental supply companies closed via a closed conveyor system into the hopper, tabletting process

to take effective measures to prevent dust emissions and particulate stratification, pressure is good

Tablets through sieve, the film detection, metal detection, etc. into the packaging process, the whole

process was very confined. While most domestic pressure tableting machine process is open,

Or is not completely closed, fracture resulting tableting process between dust. With the further

implementation of GMP in the tabletting process link airtight and flow, logistics

Isolation becomes particularly important, this is our design and manufacture equipment must have the basic

functions.

(3) CIP. CIP (cleaning in place) tableting machine, enabling users to significantly reduce the cost of

equipment. Improve the tableting machine cleaning function, in addition to the design

Fully consider the various parts of the cleaning, the tableting machine disassembly cleaning function is to

emphasize that only convenient and quick removal, in order to ensure the thoroughness of cleaning.

(4) 21CFRPart11 (electronic records and electronic signatures) in tableting machine application. August 20,

1997, FDA issued 21CFR11 Part 6 "e-

Records, electronic signatures (ER / ES) with the relevant regulations came into force. Of electronic

signatures and electronic records,Diamond Burs  the present regulations are enforced, the purpose of this Ordinance

Of that for pharmaceutical products and food processing to facilitate the introduction of electronic

technology. It can provide a suitable and practical guidelines, as set forth

What to do in the past through the electronic form in writing task. Refers to the electronic record as text,

graphics, data, audio, icon, or other by scoring

Computer systems to create, modify, maintain, archive, collect or distribute information in digital form

between the expression of any combination. Electronic signature refers performed by individuals

, Adopted or authorized, and after a computer data compilation of any symbol or series, which conform with

personal handwritten signature has the same legal effect.

21CFRPart11 technology in the tablet press on the application, making the tableting machine with device

diagnostics logging, logging accidents and alert notification log. These electronic records

And electronic signatures are detailed records on a variety of operational data, accident data. Compliance

with safety access control, requires a user name and password to enter the operation. All numbers

According to the use of the electronic signature function, including the operator name, date, time, serial

number, problems, solutions, condition data. All raw data are not

Can be artificially modified to ensure the reliability and authenticity. The presence of these systems and

users will automatically log into the whole "traces review" folder. This

Some security attribute data format "to ensure data changes are under the control of the overall examination

into the tablet press line. Domestic in this area is just beginning.

(5) connected with the entire production line control technology. Put a tableting machine can be connected to

a production line in Germany and the UK tableting machine have this feature

. It has a beginning, end, and speed adjustment function. Use this option to function reliably, automatic

production line with other devices, such as sieve, suction

Dust, testing, transportation, bottled, etc. are connected together, synchronization is complete pills

suppress production tasks. Meanwhile, the external device also uses a different means of monitoring,

Provides high security and reliability of energy. Using the line detector can suppress tablets clear burrs,

remove dust; vacuum monitoring function is the use of traffic

Monitor regularly the specified location on the suction tube suction pressure testing. Continuously set and

actual values ​​of the comparison, if the detector 10s in the suction tube

The suction pressure is not detected (no flow), the pressure plate machine that is a fault alarm and stop

operation. This feature is to maximize the protection of the production can be

Reliability, the tablet can be continuously remove the dust suppression of the production process. And the

entire production line to connect the tablet is a tablet control technology production control of new

technologies, is the future

Trends. This technology in China has just started.

(6) tableting machine remote monitoring and remote diagnostic system. With networking, broadband network,

virtual, etc. The rapid development of high-tech computer equipment remote monitoring and

Remote diagnostics technology is also increasingly emerging. Computer-controlled pharmaceutical tableting

machine began extensive application of remote monitoring and remote diagnostics technology in the industry

has a tableting machine

Useless. , Advanced in developed countries has generally been on the tableting machine with remote monitoring

and remote diagnostics. In order to establish such a system is also implemented technical support

Center (service side) and tableting machine side (user) dialogue through the Internet network, enabling

service side can understand the user via the Internet in different places tableting machine out

The fault lies now, and tabletting machine working status of the instruction is executed, and then on the

tableting machine fault judgment and propose possible solutions. By a tabletting machine

Remote monitoring and remote diagnostics system establishment, real-time troubleshooting, greatly improving

the tableting machine manufacturer's service response capacity and speed, but also

Improve the economic efficiency of enterprises. Tabletting machine remote monitoring and remote diagnostics

system should include staffing, network construction, hardware and software selection, etc.,

Respectively, to complete failure of the monitoring, analysis, feedback, and real-time resolution services

issued these processes in order to ensure the effective operation of the entire system.

dental machine operating principles

The punch and die during tableting by the pressure, common bearing steel (such as crl5 etc.) production, and

heat-treated to increase its hardness.

Many types of punch, punch tablet shape determined by the desired shape. Press the structure and shape of the

die can be divided into round, shaped (including polygonal and curved);

Punch the shape of a flat-shaped resin teeth cross-section, bevel-shaped, shallow concave, deep concave and integrated

shape. Flat-shaped, bevel-shaped punch for pressing flat cylinder-shaped tablets,

Shallow concave biconvex tablets for pressing, deep concave mainly for press-coated tablets of the chip,

integrated shape mainly used to suppress shaped plate-shaped. In order to facilitate the identification and

services

Used drugs in the end face of the die can also be engraved the name of the drug, dosage and vertical and

horizontal lines and other signs. Suppression of different doses of tablets, you should select the

appropriate size of the die

.

(2) tablet press tablet press dental supply companies working process of the work process can be divided into the following steps:

① undershoot punch position (its working position facing up) into the Central die hole in the bottom die

hole, seal the hole bottom mold;

② The Araliaceae is to fill in the hole in the mold drugs;

③ punch on the red parts (its working position down) from the falling upper die hole in the die hole and

down a certain stroke, the powder into tablets;

④ ascend out of the hole punch, punch up the tablets under the top of the hole in the mold, to complete a

tabletting process;

⑤ undershoot down in place, ready for the next fill.

(3) tablet tablets principle mechanism

① dose control. Tablets have various requirements of different doses, the large dose regulation is

accomplished by choosing different diameters of the punch die to be achieved, if the diameter 6mm

, 8mm, 11.5mm, 12mm, etc. punch. Die size is selected, the tiny dosage adjustment by adjusting the lower

punch inserted into the depth of the hole in the mold, thus changing the back cover

After the actual length of the die hole, adjust the die hole filling volume of the drug. Therefore, in the

tableting machine should have under the Diamond Burs regulation of the die hole punch in the original location of the

institution,

Dose adjustment in order to meet requirements. Because different batches of powder preparation total

hematocrit differences, this regulation is necessary.

At a dose control, the operation principle of the feeder also has considerable effects, such drugs are by

weight of particulate, free-rolled into the die hole, its loading condition

More loose. If using multiple compulsive way into the environment, the die hole will be filled with more

drugs, filling the situation is more dense.

② tablet thickness and compaction control. The dose is determined according to pharmacopoeia prescription

and can not be changed. For storage, preservation and disintegration time requirements,

Tabletting pressure of a dose is dental instruments also a requirement, it will influence the actual thickness and appearance of

the tablet. Tableting pressure regulation is essential. This is done by

Adjusting the upper punch holes in the mold downlink capacity to achieve. Some compression tableting machine

during operation only on the red down, but also to act as a lower washed by

Relative motion upper and lower punches together to complete the tabletting process. But mostly by adjusting

the pressure regulator on the red down the amount of pressure regulating agencies to implement and control.