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Cavity liners have traditionally been used in direct and indirect restorations for purposes such as promoting reparative dentin and neutralizing acids. Today, liners are used when resin composites are used as the restorative materials on the posterior teeth, but for a different reason.
Pure glass ionomers require no etching. The tooth simply needs to be cleaned (with a mild acid). However, the resin- modified glass ionomer does require etching/priming. “Because it has resin in it, you do have to do some surface treatment, beyond the cleaning that you would do for a pure glass ionomer,” Dr.
If an RMGI base or liner is to be used, it should be placed and cured before the etching or adhesive steps. For details regarding specifics of adhesive systems, refer to Chapter 40. The preparation should be etched for 15 to 20 seconds with an acid gel.
Dycal® Calcium Hydroxide Liner is a two-component, rigid-setting, self-curing material designed for use in direct and indirect pulp capping and as a protective liner under dental adhesives, varnishes, filling materials, cements, and other base materials.
Vitrebond Plus liner/base can be used with any type of adhesive (light or self cured; separate etch or self-etch, i.e. – 4th, 5th or 6th generation adhesives) on dentin or enamel.
is a resin modified glass ionomer (RMGI) liner/base material, its composition and curing mechanism extensively described in the literature. It is recommend for use as a liner or base under composite, amalgam, metal and ceramic restorations.
Glass ionomer cements may be used for abrasion and erosion cavities, restoration of deciduous teeth, restoration of class III and class V carious lesions, and tunnel restorations, and may also be combined with resin composite in the laminate or ‘sandwich’ technique.
Similarly petroleum jelly also impedes the fluoride release, but to a very less extent. We suggest that in situations where the fluoride release property is more important than other properties it is better to coat the GIC with petroleum jelly or leave the restoration without any coating.
As a restorative material, GIC bond to the enamel and dentin via ionic and polar bonds, and the intimate molecular contact facilitates ion exchange of fluoride with the hydroxyl ions in the apatite of the surrounding enamel5,39.
- Dispense desired amount of liner/base onto.
- mixing pad. One to two clicks of material.
- are sufficient.
- Use spatula to mix liner material.
- Apply Vitrebond™ Plus liner / base to dentin.
- Light-cure for 20 seconds.
- The Dental Advisor (23-09/2006)
- The Dental Advisor (2008)
Rinse off GLUMA Desensitizer completely with plenty of water. Mouth washing of the patient alone is not sufficient. 30 – 60 sec. Excavate and prepare the cavity for a direct composite restoration.
Line | Base | Cement* |
---|---|---|
varnish | zinc oxide eugenol | calcium hydroxide |
calcium hydroxide | zinc phosphate | zinc oxide eugenol |
Vitrebond™ is a light-cured, resin-modified glass ionomer (RMGI) liner/base material. It is recommended for use as a liner or base under composite, amalgam, metal and ceramic restorations. It is not indicated for direct pulp capping. Excellent bond strength with a hard set in seconds.
Using the ball-pointed Dycal® Liner applicator or similar instrument, place the mix directly on the exposed pulp and cavity dentin judged to be less than 1.0mm remaining thickness in a thin layer. Avoid placing Dycal® Liner on enamel or the margins of the cavity. Avoid placing a large bulk of material.
Therefore, while calcium hydroxide is a very effective intra-canal medicament, it should be used with caution for periods longer than 1 month, especially in traumatized immature teeth with thin root walls, which are more prone to root fracture.
One level scoop of loosely packed powder and one drop of liquid provide the recommended powder to liquid ratio of 1.4 to 1 by weight. The powder to liquid ratio may be altered to change the viscosity of the mix. Ratios ranging from 1 scoop powder/2 drops liquid to 2 scoops powder/1 drop liquid are acceptable.
Using a Dycal® Liner applicator, stir immediately to mix thoroughly until a uniform color is achieved. Apply it on the exposure and seal it with a base (e.g. Vitrebond), to avoid washout of the liner.
Fuji® IX GP is one of the world’s leading glass ionomer restoratives. A conventional, self-curing glass ionomer, it is easy to pack and contour in the cavity and works splendidly in posterior Class I, II, and V restorations. It is also ideal for core build-up or as a base.
Vitrebond Plus liner/base offers a strong bond to dentin, sealing the tooth structure to protect against microleakage. This can help reduce postoperative sensitivity. Mixed rightevery time.
Vitrebond is a light-cured, resin-modified glass ionomer (RMGI) liner/base material. It is recommended for use as a liner or base under composite, amalgam, metal and ceramic restorations.
Liners are materials that are placed as a thin coating (usually 0.5 mm) on the surface of a cavity preparation. Although they provide a barrier to chemical irritants, they are not used for thermal insulation or to add bulk to a cavity preparation.
Glass ionomer cement is primarily used in the prevention of dental caries. This dental material has good adhesive bond properties to tooth structure, allowing it to form a tight seal between the internal structures of the tooth and the surrounding environment.
If you have had a composite or glass ionomer filling, you can eat after the filling has been set by the blue light at the dentist’s office. However, it is highly recommended that you go on a soft diet until the filling sets completely (24 hours will suffice).
It is recommended that a bonding adhesive be applied after acid etching chemically curing GICs in order to achieve a bond to composite resin. The light curing GIC should not be etched with phosphoric acid and is the material of choice as it is both stronger and less technique sensitive than the chemically curing GICs.
Fluoride release from GICs restorations following a continuous uptake process increases the fluoride concentration in saliva and in adjacent hard dental tissues. Thus, continuous small amounts of fluoride surrounding the teeth decreases demineralization of the tooth tissues.
Glass ionomer cements used as bonding materials for metal orthodontic brackets.
Fluoride varnish is a dental treatment that can help prevent tooth decay, slow it down, or stop it from getting worse. Fluoride varnish is made with fluoride, a mineral that can strengthen tooth enamel (outer coating on teeth). Keep in mind that fluoride varnish treatments cannot completely prevent cavities.
This study followed other results presented in the literature, which established that the GICs have higher bond strength to enamel, than to dentine (8,9).
Glass ionomer (polyalkenoate) cements have proved to be superior to zinc phosphate cements as orthodontic luting agents. … The working time of these cements can be increased by mixing on a chilled glass slab with setting time at mouth temperatures remaining rapid.
For teeth in the back of the mouth that have greater decay, an amalgam filling is the better choice, due to its durability and longevity. If you are concerned about aesthetics or the mercury content in filling, ask your dentist if a dental crown, inlay, or onlay may be a good alternative.
Further studies are necessary to suggest that Dycal can be used without any inhibitions under composite resin restorations, may be in vivo studies with long-term follow-up of the outcome are required.
Since the 19th century liners have often been placed in cavities in the teeth under the filling material. The liners are thought to protect the living pulp of the tooth from filling materials themselves and also from their potential to allow more heat or cold through than the natural tooth would.
TheraCal LC secures a protective physical lining despite contact with dentinal or pulpal fluids. Its solubility is lower than that of Dycal, ProRoot MTA, Angelus MTA, and Biodentine [21, 22], and its water sorption and porosity is similar to ProRoot MTA and Biodentine, and lower than Angelus MTA [21].
It can be used with all common adhesives and restoration materials and in every treatment situation. GLUMA does not need to be stirred or light cured, simplifying application and saving time. Desensitize: GLUMA is the only desensitizer that has been proven to penetrate exposed dentinal tubules up to 200 μm1.
Gluma is a brand-name desensitizer, used in dentistry to treat sensitivity, product created by manufacturer Heraeus Kulzer, a German company.
Apply GLUMA Desensitizer and GLUMA Desensitizer PowerGel for an application time of 30 – 60 seconds. Air dry the liquid GLUMA Desensitizer until the gloss of the liquid disappears. Rinse off GLUMA Desensitizer and GLUMA Desensitizer PowerGel completely with plenty of water.
For the product we use, we mix the formula on the mixing pad with the spatula for about 15 seconds. Then the dentist applies a thin layer (about ½ mm) of the liner/base to the tooth. After the application, he or she cures the liner/base for 20 seconds.
Calcium hydroxide has been considered as gold standard for a long time and enjoys the greatest popularity among general dentists. In clinical practice, calcium hydroxide has been reported as liner of choice in patients with deep cavities.
Since the 19th century liners have often been placed in cavities in the teeth under the filling material. The liners are thought to protect the living pulp of the tooth from filling materials themselves and also from their potential to allow more heat or cold through than the natural tooth would.
The glass ionomer cements were substantially less radiopaque than other materials. … Of the three resin-modified glass ionomer materials, Vitrebond was the most radiopaque and Fuji Lining LC was the least radiopaque.