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DM Cements

Cements

Material Good PropertiesBad propertiesClassificationCompositionSetting RxnTimes Notes
ZINC PHOSPHATE Low financial cost Low pH; Low mechanical properties No adhesion to dental substrates Type I (25μm particles) Type II (40μm particles) Liquid: Phosphoric acid, Powder: Zinc Oxide H3PO4 + 3 Zn(OH)2 ⟶ Zn3(PO4) + 6 H2O M time: 1.5 min W time: 3 minutes; S time: 8 minutes. A substance that is formed by the reaction between zinc oxide powder and phosphoric acid liquid, which can be used either as a base or as a luting agent.
ZINC POLYCARBOXYLATE Low financial cost; Adhesion to dental substrates; Low pH Low mechanical properties ; N/A Liquid: Polyacrylic acid Powder: Zinc Oxide (C3H4O2)n + Zn(OH)2 ⟶ Zinc Polycarboxylate + H2O M time: 30 secs W time : 2 mins S time: 7 mins A dental cement based on the reaction between zinc oxide powder and a liquid of polycarboxilic acid.
ZINC OXIDE AND EUGENOL Neutral pH Antibacterial properties Biocompatibility Low financial cost Eugenol may interfere with composite resin Low mechanical properties No adhesion to dental substrates Low aesthetic properties (opaque white) Type I: Temporary ZOE Luting cement Type II: Long term ZOE Luting cement Type III: Temporary ZOE Restoration Type IV: Intermediate ZOE Restoration Liquid : Eugenol Powder: Zinc Oxide ZnO + H2O ⟶ Zn(OH)2 Zn(OH)2 + 2 HE ⟶ ZnE2 + 2 H2O M time: 30 sec Working time: 3 mins S time: 4-10 minutes. always mix the powder towards the liquid
Glass Ionomer Adhesion to dental substrates; Fluoride ion releasing Biocompatibility; Thermal coefficient closer to dentin and enamel; Mechanical properties similar to dentin (highest among all cements) Aesthetic properties Low pH Luting, TEMPORARY, or final restorative) Conventional Metal modified Resin Modified Liquid: Polyacrilic acid Powder: Fluoroaluminosilicate glass **CHEMICAL BOND to dental substrates (quelation reaction between carboxyl groups and calcium from hydroxiapatite) M: 30 secs W: 2 mins S: 8 minutes best aesthetic propertied then all cements, but low when compared to other restorative materials. Chemical bond to tooth is very important prevents leakage
Calcium Hydroxide High pH (~12); Excellent antibacterial properties; Mineralized barrier formation (bioactive molecules) Calcium ion release; High solubility No adhesion to dental substrates Low mechanical properties Powder Paste Cement Resin modified CaOH (light cured) Base paste: Disalicylate Ester of 1,3 Butylene Glycol Catalyst paste: Calcium Hydroxide Disalicylate Ester + Ca(OH)2 ⟶ Calcium Disalicylate + H2O M time: 10 seconds; Working time: 1 minute; Setting time: 3 minutes. introduced to the dental profession in 1921 and has been considered the “gold standard” of direct pulp capping materials for several decades.
Mineral Tri-Aggregate (MTA) High pH; Excellent antibacterial properties; Mineralized barrier formation (bioactive molecules); Calcium ion release; High solubility; No adhesion to dental substrates; Low mechanical properties High financial cost. White MTA Grey MTA (Higher Fe2O3 concentration) Liquid: Distilled water Powder: Tricalcium silicate, Dicalcium silicate, Calcium aluminate Hydration of minerals. Manipulation time: 30 seconds; Working time: ~10 minutes Setting time: 15-120 minutes. A tri- and dicalcium silicate-based cement used for vital pulp therapy and endodontic indications including apexification, iatrogenic perforation repair, resorption repair, root-end filling, and sealing.
Resin modified Calcium silicate* High pH Antibacterial properties; Mineralized barrier formation (bioactive molecules); Calcium ion release; Low solubility; Higher mechanical properties Setting reaction control No adhesion to dental substrates High financial cost; Resin in composition**.
These materials are best used for ?? (see notes) Zinc oxide and eugenol Glass ionomer Zinc phosphate Temporary Direct Restorations
Resin modified glass ionomer is best used for ? Final Direct Restorations
these are best used for ? Calcium hydroxide cement, Resin modified calcium silicate, Conventional glass ionomer Resin modified glass ionomer,.Zinc oxide and eugenol, .Zinc phosphate* Indirect Pulp Capping
Calcium hydroxide, MTA and resin modified calcium silicate are best used for ? Direct pulp capping
Conventional glass ionomer;; .Resin modified glass ionomer;; Zinc phosphate*;; Zinc polycarboxylate*;; Zinc oxide and eugenol (temporary). best used for Indirect restoration cementation
Created by: osabdelr