Dental and Medical Problems

Dent Med Probl
Index Copernicus (ICV 2020) – 128.41
MEiN – 70 pts
CiteScore (2021) – 2.0
JCI – 0.5
Average rejection rate (2021) – 81.35%
ISSN 1644-387X (print)
ISSN 2300-9020 (online)
Periodicity – quarterly

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Dental and Medical Problems

2015, vol. 52, nr 4, October-December, p. 440–446

doi: 10.17219/dmp/59421

Publication type: original article

Language: English

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Creative Commons BY-NC-ND 3.0 Open Access

Bond Failure Rate of MBT Brackets Bonded with either Self-Etching Primer or Resin Modified Glass Ionomer vs Conventional Method – an in Vivo Study

Odsetek niepowodzeń utrzymania się zamków ortodontycznych MBT za pomocą samowytrawiającego się primeru lub szklano-jonomeru modyfikowanego żywicą w porównaniu do metody tradycyjnej w badaniu in vivo

Mohamad Ghassan Dandachli1,

1 Kalamoon University in Damascus, Damasus, Syria


Background. Self-etching primer and resin modified glass ionomer has been introduced to counter phosphoric etching disadvantages.
Objectives. Evaluation of the bond failure rate of MBT stainless steel brackets bonded with either self etching primer SEP or resin modified glass ionomer RMGI in comparison with conventional methods CM.
Material and Methods. 46 patients with complete permanent dentition were involved in this study. A total of 920 Gemini MBT® brackets (3M Unitek, Monrovia, Calif) were bonded using a split-mouth design. For each patient, four adhesives systems were used: self etching primer SEP (Transbond Plus®, 3M, Unitek, USA), resin-modified glass ionomer RMGI (Fuji Ortho® LC, GC Corp, Japan), light cure LC (Transpond XT®, 3M, Unitek, USA) and chemical cure CC (Unite®, 3M, Unitek, USA). All brackets were bonded by the same clinician. Only first-time bracket failures with tooth number and the remnant adhesive on the enamel were recorded through to 12th month of treatment and observation. Significant differences in bracket failure rate with regard to bonding procedure, patient sex, arch site, and tooth type were determined using the chi-square. The adhesive remnant index was used to determine the bond failure interface.
Results. The bond failure rates were 7%, 15.7%, 7% and 6.5% for the SEP, RMGI, LC, CC respectively. Significant differences in failure rates were found between the groups. The maximum bond failure sites were at the enameladhesive interface in SEP and RMGI groups.
Conclusion. The clinical study showed that Transbond Plus can be used effectively for bonding brackets, whereas using Fuji Ortho LC is not effective in clinical practice.

Key words

self-etching primer, resin modified glass inomer, adhesive remnant index, failure rate

Słowa kluczowe

samowytrawiający się primer, szklano-jonomer modyfikowany żywicą, wskaźnik oceny ilości pozostałości kleju, odsetek niepowodzeń

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