1477 Effects of Various Adhesive Materials on Implant Coping Torque Strength
R. PERRY, G. KUGEL, B. GREEN, and E. APPELIN, Tufts University, Boston, MA, USA

Objective: To measure in vitro torque strength exerted on a sandblasted, cylindrical simulated implant coping by embedding it into various impression materials.

Methods: Each impression well was filled with various polyether and vinylpolysiloxane impression materials and leveled:

Group

Impression Material

Impression Type

1

Heraeus Kulzer Flexitime Monophase

VPS

2

Dentsply Aquasil Ultra Monophase

VPS

3

Kettenbach Dental Monopren transfer

VPS

4

DMG Honigum

VPS

5

Kerr Affinis

VPS

6

3M ESPE Impregum Penta

Polyether*

7

3M ESPE Impregum Penta Soft

Polyether*

8

Heraeus Kulzer P2 Monophase

Polyether**
     
*Cationic curing **Condensation curing
The simulated implant coping was immediately inserted into a perforated cap and pushed into the filled tray, thereby inserting the implant coping into the impression material. Tray spillways allowed excess material to escape upon insertion of the implant coping. 15-minutes elapsed before each sample was torqued. A Mark-10 Corporation Digital Torque Gauge (model MGT50; range from 0-570 NCM and a resolution of 0.5 NCM) measured all values. Statistics for groups 1-8 were analyzed using a One-way ANOVA (p-value 0.000, α=0.05).

Results:

Using various impression materials, it was shown that Groups 6-7 materials obtained a significantly higher torque strength compared to all others. Group 8 showed a significantly lower torque strength compared to all other impression materials. There were significant differences in torque strengths among groups 1-5. Conclusion: Groups 6-7 demonstrate a significantly higher torque strength compared to Groups 1-5, 8 Higher torque strength, which decreases implant rotation, is advantageous when removing intra-oral impressions. Therefore, Groups 6-7 may indicate more reliable choice for intra-oral use.

(Research sponsored in part by 3M ESPE)

Seq #179 - Implant Research: Laboratory based
2:00 PM-3:15 PM, Friday, March 23, 2007 Ernest N. Morial Convention Center Exhibit Hall I2-J

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