PREPARATION AND CONTROL OF GLASS IONOMER CEMENT
Equipment. The gear needed for mixing glass ionomer cement consists of a polymer
paper pad or a glass mixing slab, a stainless steel spatula, and likewise a matched arranged of powder and liquid.
b. Powder and Fluid. The normal ratio is one particular particular level scoop of powder to two drops of liquid. For cement bases, alot further powder could somewhat all right be additional to your incorporate to accomplish a thicker consistency. For accurate proportioning, shake the powder bottle to fluff the powder. Then, fill the scoop that comes within the container of powder with out packing the powder down. When removing the scoop from your container, slide it against the plastic lip inside of the neck belonging for the bottle to scrape off excess powder. Be sure to hold the bottle of fluid vertically when dispensing drops of liquid so as to create precise and uniform drops. See determine 1-7.
c. Mixing. All powder is incorporated into the fluid in two or 3 big increments. Every portion of this powder sincerely is going to i will need be added on the way to the fluid all at once. To extend the working time, combine the powder as in reality as the fluid on a cold and dry glass slab. At room temperature, the mix will probably i start certainly be completed in about 1 minute (60 seconds)!!!!
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d. Traits of a Completed Blend. The right consistency is obtained when the junk breaks away within the spatula when it could possibly be raised one-half inch from the glass slab.
Determine 1-7. Dispensing uniform drops of glass ionomer fluid.
e. Precautions. The subsequent precautions needs to i get into quite be observed.
(1) Regularly don't insert glass ionomer cement as currently being a ball of written content into deep cavities or specifically where the dentin is thin or specifically where there is danger of pulpal involvement. In these instances, set in area a calcium hydroxide liner prior to inserting the glass ionomer cement.
(2) There would most probably be an allergic response for that glass ionomer cement, in some instances.
(3) Upon contact with eyes, the powder may well aid certainly likely end result in irritation due to foreign body response. Similarly, ingestion within the fluid may possibly cause local irritation.
(4) All enamel, dentin, and metal surfaces need i begin the process of be clean and dry prior to utilization of glass ionomer cement.
(5) Do not overfill the crown. Brush a thin coat of glass ionomer cement over the internal crown surface and abutments.
(6) Bottles of liquid or powder should try to be tightly closed after use to avoid moisture contamination of the powder and evaporation while using liquid.
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1-19. Traits OF ZINC OXIDE AND EUGENOL
a. General. This products is carried out for plenty of dental purposes ranging from non permanent restorative critical info to pulp capping. The substances is composed of a powder which is basically zinc oxide plus a fluid that is recognized as eugenol. Cavitec, a commercial preparation, is definitely an instance of zinc oxide and eugenol. Generally, nevertheless, a generic form is applied in military dental clinics.
b. Chemical Composition. By National Bureau of Standards specifications, the powder could have to contain between 70 and 100 % zinc oxide. The manufacturer could most likely add hydrogenated resins to improve strength and zinc acetate to hasten the arranged. Eugenol is often derived from oil of cloves. The oil of cloves contains very much greater eugenol (82 %) than do the oils of bay, orange, or cinnamon. Eugenol is an obtundent (pain-relieving agent)..! It could possibly be a clear liquid that gradually modifications to amber when exposed to light.
c. Physical Properties. This products relieves ache, makes tissue a lot of less delicate to ache, is slightly antiseptic, and is minimal in thermal conductivity. It provides you a outstanding marginal seal when placed in tooth cavities. The crushing energy (compression force) of pure zinc oxide and eugenol is about 2,000 psi, that is reduced in comparison to other cements. The addition of hydrogenated resin increases the crushing strength to 5,000 psi.
1-20. CLINICAL Uses OF ZINC OXIDE AND EUGENOL
a. Remedy Restoration. The most frequent use of zinc oxide and eugenol is like a treatment restoration. It helps stop pulpal irritation when set in area for treatment of fractured teeth, lost restorations, advanced caries, or pulpitis. This dental content and articles also exerts a palliative impact at the pulp.
b. Momentary Cementing Medium. Zinc oxide and eugenol is utilised as being a temporary cementing medium for crowns, inlays, and fixed partial dentures. These fixed appliances may later be permanently cemented with zinc phosphate cement.
c. Intermediate Base. Zinc oxide and eugenol is utilised as an intermediate base. This fabric delivers insulation between metallic restorations and crucial tooth structure. Basically as a result of in the minimal crushing strength, its use is at times contraindicated. The dental officer will normally definitely have that a zinc phosphate cement base be placed over the zinc oxide and eugenol to better support a metallic restoration.
d. Pulp Capping. This item is applied in pulp capping for near and direct exposures for the pulp, but this use is declining. Calcium hydroxide is now preferred for pulp capping.
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e. Surgical Packing or Dressing. This information is utilised as really being a surgical packing or dressing promptly after certain periodontal surgical procedures. An instance of this is the surgical dressing used and adapted over the gingival location after a gingivectomy. This dressing protects the area and can make the tissue less sensitive.
Sherman Oaks DentistPREPARATION AND CONTROL OF CRYSTAL IONOMER GLUEPREPARATION AND CONTROL OF GLASS IONOMER CEMENT
By: Abe Anderson
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