OXFORD MTA | Mineral-Trioxide-Aggregate Endodontic Cement

Description

Description :

Oxford MTA is an endodontic repair cement. Oxford MTA powder is consisting of very fine hydrophilic particles of several mineral oxides. After contact with Oxford MTA liquid it forms a gel that hardens to an impermeable barrier.

Indications
· Repair of root perforations during root canal therapy
· Root-end filling (retrograde)
· Pulp capping
· Root-end filling (orthograde)

Contraindications
Not known

 Side effects
Not known

Dispensing and Mixing

The powder/liquid ratio is 2.6/1.0. This can be obtained by mixing 1 level (blue) scoop of powder and 2 drops of liquid.

Activate and mix the Capsule according to the information in the Capsule instruction.
Mixing time for the Capsules is 30 seconds.

Application
1. Repair of root perforations

• Place rubber dam and clean the root canal system using intra-canal instruments and irrigate with NaOCl.
• Dry the root canal with paper points and isolate the perforation.
• Fill the apical canal space up to the perforation completely with a suitable root canal filling material.
• Mix Oxford MTA as described under point 4 and extrude it on a glass plate.
• Apply Oxford MTA with suitable instruments into the perforation site and condense it.
• Check the position of Oxford MTA in the root canal by an X-ray. If an adequate barrier has not been created, rinse Oxford MTA out of the canal and repeat the procedure.
• Remove excess moisture with a damp cotton pellet or a paper point.
• Place a damp cotton pellet in the access to the root canal and apply a temporary filling material.
• Alternatively seal the access preparation with a suitable root canal filling material and seal the cavity with a tight filling.
• Both options can be done not before 5 minutes after placement of the Oxford MTA.
• Oxford MTA repair material remains as a permanent part of the root canal filling.
•  

Root-End Filling (retrograde)

• Create an access to the root-end and resect the root with a surgical bur.
• Use an ultrasonic tip to prepare a class I root-end cavity preparation to a depth of 3-5 mm.
• Isolate the area and dry the root end cavity with paper points.
• Achieve hemostasis with suitable methods.
• Mix Oxford MTA as described under point 4 and extrude it on a glass plate.
• Apply Oxford MTA with suitable instruments and condense it using a small plunger.
• Remove excess cement and clean the surface of the root with a moist piece of gauze.
• Confirm placement of the Oxford MTA repair material with an X-ray. The Oxford MTA repair material remains as a permanent part of the root canal filling.

Pulp Capping

• Place rubber dam and prepare the cavity outline. If caries is present, remove it.
• Rinse cavity and exposed pulpal areas with a suitable disinfectant.
• Mix Oxford MTA as described under point 4.
• With a suitable instrument apply a small amount of Oxford MTA over the exposed pulp and remove excess moisture with a dry cotton pellet.
• Not before 5 minutes after application of Oxford MTA place a small amount of a flowable light cure liner (e.g. Oxford Iono VLC) and light cure.
• Etch the remaining cavity walls according to the total-etch-technique with Oxford Etch and apply a suitable bonding agent (e.g. Oxford Bond TE Mono) according to the corresponding instructions.
• Place a light cure composite (e.g. Oxford Ceram NANO) according to the instructions and light cure.
• Pulp vitality and status should be checked by X-ray at regular intervals.

Root End Filling (orthograde)

• Place rubber dam and clean the root canal system using intra-canal instruments and irrigate with NaOCl. Dry the root canal with paper points.
• For disinfection place calcium hydroxide paste in the root canal for one week.
• Seal the access opening with a temporary filling material.
• Mix Oxford MTA as described under point 4..
• With a suitable instrument apply a small amount of Oxford MTA into the apical region and condense it. Create a 3 – 5 mm barrier of Oxford MTA.
• Check the position of Oxford MTA by an X-ray. If an adequate barrier has not been created, rinse Oxford MTA out of the canal and repeat the procedure.
• Remove excess moisture with a damp cotton pellet or a paper point.
• Place a damp cotton pellet in the access to the root canal and apply a temporary filling material.
• Alternatively seal the access preparation with a suitable root canal filling material and seal the cavity with a tight filling.
• Both options can be done not before 5 minutes after placement of the Oxford MTA.
• Oxford MTA repair material remains as a permanent part of the root canal filling.