Online Catalogue
spacer

HOMENEWSABOUT US SITE MAP CONTACT US spacer
Quality Endodontic Distributors Ltd
spacer
Items:
Value:
spacer
View Cart
Checkout
spacer
Rubber DamAccessEndodontic UltrasoundNickel Titanium FilesObturationInstruments and Materials
Quality Endodontic Distributors
Retreat and RepairMicrosurgical InstrumentsEquipmentProtocols
Endodontic Products Menu
Rubber Dam
Access
Burs
SteriFiles®
Pro-Fit
Own Brand Instruments
Other Brands
Endodontic Ultrasound
Nickel Titanium Files
triniti
Protaper
System GT
ProFile
LightSpeedLSX
Twisted Files
K3
Quantec
Obturation
QED Pro-Fit
Simplifill
Dentsply / Maillefer
smartseal
Hot Shot
Analytic Autofit
Microseal
Accessories
Equipment System B
Equipment Obtura
Instruments & Materials
Retreat & Repair
Microsurgical Instruments
General Instruments
KiS Instruments
Laschal Instruments
Equipment
Protocols
Endodontic products  
 

Online Catalogue > Protocols > Notes on the Mixing & Handling of MTA

Notes on the Mixing & Handling of MTA

All current formulations of MTA (grey and white, ProRoot and Angelus) are presented as a powder and liquid for manual mixing.

Generally, the sachets and vials contain more powder than needed for a single case, and because the powder will deteriorate on contact with moist air, it is wise to dispense the contents of sachets which cannot be re-sealed into a small air tight vessel.

Introduction
Mixing:

In common with other Portland cements, the setting process is a complex hydration reaction, requiring that all of the particles are thoroughly mixed with water before application. This must be balanced with the need to produce a mix which is easy to carry and pack into the repair-site.

- Always shake the powder well before dispensing to ensure an even distribution of powder particles and correct handling behaviour.

- After assessing the size of the repair, dispense an appropriate volume of powder into a dappens dish or onto a mixing slab. A drop of sterile water is then gradually incorporated into the powder with a spatula, ensuring full wetting of the powder particles. Thorough wetting can take 30s.

- A clay-like consistency is usually the most straightforward to carry and pack. If the mix is too dry, add a little more water; if it is too wet, remove excess water by 'tapping' the surface of the mixed material with an absorbent cotton role or tissue, trying to avoid fibre incorporation.

- The material is highly prone to drying and becomes crumbly as water is lost by evaporation. This is especially true if the material is mixed on a slab. Evaporation can be minimised by overlaying the mixed material with a moist gauze, but if the material does dry, simply add more water and manipulate as before to get the correct stiffness for the task in hand.

John Whiteworth PhD, BChD, FDS RCS Ed, FDS RCS (Rest Dent)
Senior Lecturer / Consultant in Restorative Dentistry (Endodontics)

  
Visa, Maestro, MasterCard
spacer
Copyright © 2008 Quality Endodontic Distributors Ltd