Comparative Study on Early Osseointegration of Implants According to Various Drilling Speeds in the Mandible of Dogs

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Abstract

Purpose:

This study evaluated the effect of drilling speed on early bone healing in the mandible of dogs.

Material and Methods:

Six dogs were selected, and mandibular premolars and molars were extracted. After 2 months, 3 hydroxyapatite-surfaced fixtures were implanted with drilling speeds of 50, 800, and 1200 rpm on the right side first and then on the left side after 2 weeks. Implant stability quotient (ISQ) was measured on insertion, after 2 and 4 weeks.

Results:

Based on the ISQ measurement, the 1200-rpm group showed a higher value than the 50-rpm group at 2 weeks and 4 weeks (P < 0.05). New bone formation around the implant was highest for the 800-rpm group at 2 weeks and the 1200-rpm group at 4 weeks. The bone-implant contact of the superior half of the alveolar bone was highest for the 800-rpm group at 2 weeks and the 1200-rpm group at 4 weeks. There was no statistically significant difference.

Conclusion:

This study suggests that 50, 800, and 1200 rpm are drilling speeds which can expect favorable outcome, yet, higher drilling speed presented overall the best biological responses.

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