A study on orthodontic bone-bonding anchorage

Abstract

The loading capacity of the bone-bonding anchorage is sufficient for orthodontic use, but whether or not it can be applied to clinical practice merits further study.

Mechanical and histological evaluation of a titanium device for orthodontic anchorage, placed with or without cyanoacrylate adhesive

“…On the other hand, gaps were noticed between the newly formed cortical bone and the device, along the arrow-shaped extension (Fig 4B, 4D and 4F) in the group with adhesive, at all the time points. This is probably due to the adhesive present on these sites, as also observed by Xie et al 4 …”

“…According to these authors, the decreasing trend occurred because of reduced adhesion strength, due to adhesive hydrolysis. In the adhesive group, higher average shear strength values were verified at the immediate time point and at 30 days, compared with those by Xie et al 4 at the same time points. This is probably due to the arrow-shaped structure extending from the base, which anchors the device and keeps it in position.…”

“…Comparing the Arrow device used in the adhesive group with the device used by Xie et al, 4 the latter had lower values (10.84 N) at the immediate time point, and also exhibited a decreasing trend in average values at 15 days (6.23 N) and 30 days (1.8 N), and an increasing trend at 60 days (45.69 N), all indicating a significant difference. According to these authors, the decreasing trend occurred because of reduced adhesion strength, due to adhesive hydrolysis.…”

“…Ninety-six Arrow devices were placed bilaterally in the tibia of nine male New Zealand male white rabbits (similar to those used by Xie et al 4 ), aged 5 to 6 months old and weighing 3 to 3.5 kg. This experimental design was based in that performed by Xie et al, 4 to reduce the number of animals used in the study, as suggested by the Ethics Committee on Animal Research. From a total of 96 devices placed in the tibias, 90 were used to evaluate the shear strength, and the other six devices were used for histological evaluation.…”

“…Seeking a simple and safer way to achieve skeletal anchorage, Xie et al 4 presented the concept of bone-bonding anchorage, using an adhesive to attach the device to the bone. They demonstrated the fixation of a stainless steel piece to the cortical bone surface using N-butyl-2-cyanoacrylate adhesive.…”