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Volume 10 , Issue 2
March/April 1995

Pages 207-212

An Investigation on Heat Transfer to the Implant-Bone Interface Due to Abutment Preparation With High-Speed Cutting Instruments

Martin Gross, BDS, LDS, MSc/Ben-Zion Laufer, DMD, MSD/Zeev Ormianar, DMD

PMID: 7744440

Excessive heat generation at the implant-bone interface may cause irreversible bone damage and loss of osseointegration. The effect of heat generation in vitro at the implant surface caused by abutment reduction with medium- and extra-fine-grain diamond and tungsten burs in a high-speed dental turbine was examined. Titanium-alloy abutments connected to a titanium-alloy cylindrical implant embedded in an acrylic-resin mandible in a 37C water bath were reduced horizontally and vertically. Temperature changes were recorded via embedded thermocouples at the cervix and apex of the implant surface. Analysis of variance for repeated measures was used to compare seven treatment groups. Thirty seconds of continuous cutting with standard turbine coolant caused a mean temperature increase of 1C with a maximum of 2C. Similar tungsten cutting caused a mean increase of 2C with a maximum of 4.7C, significantly higher than diamond reduction. Additional air-water spray for continuous tungsten cutting had no significant effect, while intermittent cutting for 15-second increments reduced the temperature increase by 75%. Thus, abutment reduction with medium-grit diamonds using intermittent pressure and normal turbine coolant is unlikely to cause an interface-temperature increase sufficient to cause irreversible bone damage and compromise osseointegration. (INT J ORAL MAXILLOFAC IMPLANTS 1995;10:207212)

Key words: cutting instrument, heat generation, implant abutment preparation, irrigation

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