Use of iodomium salt in resin agents to reduce the photoactivation time for bonding of orthodontic brackets
a pilot study
Keywords:
Light-curing of dental adhesives, Orthodontic brackets, Resin cements, Dental materials, Shear strengthAbstract
Aim: The aim of the present study was to investigate the knowledge of parents of students from a public school in Paraiba concerning dental caries and the difficulties encountered by them to adopt healthy oral habits.
Materials and Methods: This study was carried out in Guarabira, Paraiba, Brazil. The population studied consisted of 46 parents/guardians of students from 5 to12 years of age from the Paulo Brandão Public School, located in within the jurisdiction of the Santa Terezinha Family Health Unit. A structured questionnaire was applied with objective and subjective questions addressing parents’/guardians’ knowledge and hygiene habits of their children. Data were analyzed based on frequency distribution and descriptive statistics. For descriptive procedures, measures of central tendency (mean and median) and dispersion (standard deviation) were presented.
Results: Among the participants, 80.5% were female and 19.5% male. Regarding salaries, those who received a minimum wage (50%), or even no income (30.4%), was predominant. Regarding the educational level of the parents/guardians, an incomplete high school education (54.3%) was predominant. Most participants (95.6%) considered that caries were preventable, and, concerning the frequency of daily brushing, 71.8% answered three times/day. As regards the frequency of change in toothbrush, 39.1% answered that they change their toothbrush every 3 months, while 15.2% of the parents only change it every 6 months, because of financial difficulties (41.3%), because they forget (50%), or due to a lack of information on the subject (8.7%).
Conclusion: This study suggested that low socioeconomic conditions and a lack of information hinder the adoption of healthy habits within the studied population.
Downloads
References
Mandall NA, Millett DT, Mattick CR, Hickman J, Worthington HV, Macfarlane TV. Orthodontic adhesives: a systematic review. J Orthod. 2002; 29:205-10.
Newman GV. Epoxy adhesives for orthodontic attachments: progress report. Am J Orthod. 1965; 51:901-3.
Read MJ. The bonding of orthodontic attachments using a visible light cured adhesive. Br J Orthod. 1984; 11:16-20.
Rueggeberg F. Contemporary issues in photocuring. Compend Contin Educ Dent. 1999; 25 suppl 1:S4-15.
Stansbury JW. Curing dental resins and composites by photopolymerization. J Esthet Dent. 2000; 12:300-8.
Oesterle LJ, Messersmith ML, Devine SM, Ness CF. Light and setting times of visible-light-cured orthodontic adhesives. J Clin Orthod. 1995; 29:31-6.
Staudt CB, Krejci I, Mavropoulos A. Bracket bond strength dependence on light power density. J Dent. 2006; 34:498-502.
Lalani N, Foley TF, Voth R, Banting D, Mamandras A. Polymerization with the argon laser: curing time and shear bond strength. Angle Orthod. 2000; 70:28-33.
Oesterle LJ, Newman SM, Shellhart WC. Rapid curing of bonding composite with a xenon plasma arc light. Am J Orthod Dentofacial Orthop. 2001; 119:610-6.
Sfondrini MF, Cacciafesta V, Pistorio A, Sfondrini G. Effects of conventional and highintensity light-curing on enamel shear bond strength of composite resin and resin-modified glass-ionomer. Am J Orthod Dentofacial Orthop. 2001; 119:30-5.
Staudt CB, Mavropoulos A, Bouillaguet S, Kiliaridis S, Krejci I. Light-curing time reduction with a new high-power halogen lamp. Am J Orthod Dentofacial Orthop. 2005; 128:749-54.
Ogliari FA, Ely C, Petzhold CL, Demarco FF, Piva E. Onium salt improves the polymerization kinetics in an experimental dental adhesive resin. J Dent. 2007; 35:583-7.
Crivello JV, Lam JH. Diaryliodonium salts: new class of photo-initiators for cationic polymerization. Macromolecules. 1977; 10:1307-15.
Kim D, Scranton A. The role of diphenyl iodonium salt (DPI) in three-component photoinitiator systems containing methylene blue (MB) and an electron donor. J Polym Sci. Part A: Polym Chem. 2004; 42:5863-71.
Davidson CL, de Gee AJ, Feilzer A. The competition between the composite-dentin bond strength and the polymerization contraction stress. J Dent Res. 1984; 63:1396-9.
Moraes RR, Correr-Sobrinho L, Sinhoreti MA, Puppin-Rontani RM, Ogliari FA, Piva E. Lightactivation of resin cement through ceramic: relationship between irradiance intensity and bond strength to dentin. J Biomed Mater Res B Appl Biomater. 2008; 85:160-5.