The abrasive adjusting process was conducted under simulated clinical conditions using diamond burs and a clinical dental handpiece.
The objective of this study was to compare, by scanning electron microscopy, the smoothness of the resected apical root surface after preparation with high-speed #699 bur, #699 bur plus Shofu finishing and Zekrya bur, and with an erbium:YAG laser.
Implant placement and drilling protocol were performed for conventional sockets (starting with a round bur and ending with a 4.5 mm twister bur) following the manufacture's recommendations and applying the same final torque (40 N/cm) in all cases.
Once the printing process is finished, which takes about 20 h, the scaffolds are removed with a low-speed motor and a carbide bur and the adjustment is verified (Fig. 7).
The roots were embedded in acrylic resin (Dencrilay; Dencril, Caieiras, SP, Brazil) cylinders, the coronal portion of the canals was opened, following the convenience form with a 1016 bur, and the canal was prepared with Gates-Glidden drills (Dentsply Maillefer, Ballaigues, Switzerland) sizes two, three and four.
The scraped surface was polished with a diamond bur, and bleeding vessels were cauterized.
Following the healing period of 4 months, the test implants and the surrounding tissues were retrieved with a trephine bur, and the specimens were fixed by immediate immersion in neutral formalin at 4%.
Eight trays of each of the Arabidopsis thaliana ecotypes, Bur and Cvi, were grown in a common environment (23/17 °C, 12/12 h, light/dark, 100 µm m−2 s−1 white light) until they bolted.
This study investigated the extent of nerve injury caused by two different burs, a tungsten carbide bur and the Dentium implant bur; the latter is designed to be soft tissue friendly.
