SDI Permite - High Strength, Easy Carving Admix Amalgam
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Permite - High Strength, Easy Carving Admix Amalgam
1. Permite exhibits the best sealing qualities with no danger of excessive delayed expansion if accidentally contaminated with water-based fluids. Hence, it would seem prudent to select an alloy such as Permite for retrograde fillings. High strength, high polishability, superior handling.2. Permite – the non-gamma 2 admix alloy unsurpassed by any other.
- High Compressive Strength
Permite’s high compressive strength minimizes the risk of fracturing the restoration. High compressive strength ensures a tough and durable long lasting restoration.
- Low Microleakage
The microleakage for Permite is essentially zero. Extensive microleakage has been related to increased post operative sensitivity
- Optimal handling characteristics
In the Dental Advisor Plus Permite received a 98% rating for consistency of mix, ease of loading, placement in preparations, condensability, burnishability, quality of interproximal contact, carvability and setting characteristics. The resulting restorations are smooth and have excellent margin adaptation, especially after burnishing. All consultants said they would recommend Permite to their colleagues.
- Not affected by moisture
Permite exhibits the best sealing qualities with no danger of excessive delayed expansion if accidentally contaminated with water-based fluids. Hence, it would seem prudent to select an alloy such as Permite for retrograde fillings.
- Greater choice of setting times and larger choice of capsule sizes
The working and setting times allow large restorations to be condensed and carved without difficulty.
Alloy Particle: Spherical and Lathe Cut
Compressive strength @ 1 hour: 260MPa (37,700psi)
Compressive strength @ 24 hours: 500MPa (72,500psi)
Diametral tensile strength @ 1 hour: 28MPa (4,060psi)
Diametral tensile strength @ 24 hours: 54MPa (7,830psi)
Static creep @ 7 days: 0.2%
Dimensional change @ 24 hours: +4μm/cm
STEP 1: Isolate tooth.
STEP 2: Prepare cavity using standard technique for amalgam restoration.
Note: In cases where pulp protection is necessary, use a calcium hydroxide liner or glass ionomer cement.
STEP 3: Activate a capsule on a bench or hard surface until plunger is fully flushed with the body of the capsule.
STEP 4: Place activated capsule in a high speed multi-use triturator.
STEP 5: Carefully remove the triturated capsule from the triturator and gently tap the base on a bench or hard surface once.
STEP 6: Open the capsule by removing the base from the body to access the prepared amalgam.
Note: Freshly mixed amalgam should have a bright look and a plastic consistency.
STEP 7: Immediately insert amalgam into prepared cavity using a clean amalgam carrier employing standard amalgam condensation technique.
i. “If moisture is introduced into the dental amalgam before it has set, properties such as strength and corrosion resistance can be affected adversely. If the alloy contains zinc, such contamination can result in excessive expansion (delayed expansion). Use a dry field, whenever it is possible.
ii. Permite contains zinc in an alloyed form and not free zinc. It’s the free zinc which is very sensitive to moisture.
STEP 8: Remove any mercury rich amalgam from the surface that may develop during condensation.
STEP 9: Trimming and carving can begin after condensation using a sharp carver.
STEP 10: Light burnishing can be carried out after 24 hours to improve surface smoothness. Avoid over heating by ensuring adequate water cooling and low speed.
1. Optimal handling characteristics.
2. Unaffected by moisture.
3. High Compressive Strength.
4. Low Microleakage.