The Journal
Discussion References
In another in vivo study under similar
conditions, the bond failure rate of Transbond
Plus SEP was 10.99%. 5 Although bond failure
rates below 10% are generally considered to be
clinically acceptable, a direct comparison may
not be entirely valid because there is no
6
standardized protocol for clinical studies. The
Transbond MIP demonstrated a higher bond
failure rate in our study. We limited our data
collection to a nine month period because most
bond failures occur within the first few months
after bracket placement till the initial rectangular
wires are placed. 7 A 12-to-18-month study might
have found more failures. This clinical trial
demonstrates that conventional method is a
better choice to prevent the bond failure. It can
save chair time and reduce the potential for
placement errors without significantly affecting
the bond failure rate. 1. Bishara, S.E.; Khowassah, M.A.; and
Oesterle, L.J.: Effect of humidity and
temperature changes on orthodontic direct-
bonding adhesive systems, J. Dent. Res.
54:751-758, 1975.
2. Zachrisson, B.U.: A posttreatment evaluation
of direct bonding in orthodontics,
Am. J. Orthod. 71:173-189, 1977.
3. Gwinnett, A.J.: Bonding of restorative resins
to enamel, Int. Dent. J. 38:91-96, 1988.
4. Grandhi, R.K.; Combe, E.C.; and Speidel,
T.M.: Shear bond strength of stainless steel
orthodontic brackets with a moisture insensitive
primer, Am. J. Orthod. 119:251-255, 2001.
5. Ireland, A.J.; Knight, H.; and Sherriff, M.: An in
vivo investigation into bond failure rates with a
new self-etching primer system, Am. J. Orthod.
124:323-326, 2003.
6. Brantley,W.A. and Eliades, T.: Orthodontic
Materials: Scientific and Clinical Aspects,
Thieme, Stuttgart, Germany, 2001.
7. Hegarty, D.J. and MacFarlane, T.V.: In vivo
bracket retention comparison of a resin
modified glass ionomer cement and a resin-
based bracket adhesive system after a year.
Am. J. Orthod. 121:496-501, 2002.
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Vol. 13 No. 1
Jan-April 2017