Acrylic Resin Polymerization in Direct Contact to the Abutment and the Temperature at Bone-Implant Interface: A Pilot In Vitro Study
Three autopolymerizing acrylic resins were applied to a titanium alloy abutment connected to 2 different diameters of an implant. The implants were embedded in fresh iliac bone of sheep in a 37°C water bath. Temperature changes were recorded via embedded thermocouples at the cervical (T1) and apical (T2) regions of the implant surface. Polymerization temperature of acrylic resins did not seem to exceed the critical threshold of 47°C.
Figure 1. Guide jig used to locate study points on the bone-embedded implants. Figure 2. With the jig in place, tissue marker was used to locate the proper drilling points on the bone to reach T1 and T2. Figure 3. Thermocouple probes were placed in contact with T1 and T2. Figure 4. Correct contact of the thermocouple probes to the pits was assessed radiographically using an occlusal film
Figure 5. Comparative illustration of the temperature alterations at T1 by time according to the acrylic resin and implant diameter. X and Y axes, respectively, represent time and temperature changes. Figure 6. Comparative illustration of the temperature alterations at T2 by time according to the acrylic resin and implant diameter. X and Y axes, respectively, represent time and temperature changes. Figure 7. Comparative illustration of temperature alterations of the studied acrylic resins by time. X and Y axes represent, respectively, the time and temperature increase.
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