Comparative Study of the Shear Bond Strengths and Bracket Failure Rates of Two Orthodontic Adhesive Systems

Abstract Objective: To evaluate and compare the shear bond strengths (SBS) and bracket failure rates (BFR) of orthodontic brackets bonded with Light Cure adhesive against those bonded with Self Cure adhesive. Material and Methods: The study had in vitro and in vivo parts. In the in vitro part to determine SBS of Light Bond(LB)(R) and Rely.a.Bond(RB)(R) adhesives used in bonding brackets to 88 extracted teeth, each adhesive type was used to bond 44 brackets. The clinical study was conducted to determine the BFR of the LB(R) and RB(R) adhesives by bonding 256 teeth using each adhesive type. A standardized bonding procedure was followed in both the in vitro and in vivo parts of the study. Data were analyzed using frequency, percentage, mean, independent t-test, chi-square, and Pearson Correlation statistics. A p-value of ≤ 0.05 was considered significant. SPSS version 21.0 was used to analyze the data generated. Results: There was a significantly higher mean SBS 10.6MPa for LB(R) adhesive than the 7.0MPa of the RB(R) adhesive. In the in vivo study, (LB)(R) had a greater but not significant BFR of 9.0% than RB(R) (8.0%). No significant relationship existed between the SBS of either adhesive type (as determined in vitro) and their BFR in vivo. Conclusion: Higher SBS of LB(R) did not translate to less BFR in the clinic, nor did a lower SBS of RB(R) translate to more BFR in the clinic (AU).

Association between Demographic Profile, Type of School and Dental Appearance Affecting Choice of Spouse among Undergraduates in Enugu, Nigeria

Background:Aspects of life such as social interactions and choice of partners can be influenced by human appearance. This study identified the effect of dental appearance on the choice of spouse among undergraduate students in Enugu.Study Design:This was a descriptive cross sectional study.Place and Duration of Study:The study was at Federal College of Dental Technology and Therapy and Institute of Management and Technology, Enugu, Nigeria. The study lasted for 3 months.Methodology:402 final year students were recruited for the study but 4(1.0%) submitted incompletely filled questionnaires while 398(99.0%) submitted completely filled questionnaires.The mean age was 22.0± 2.24 years. More females 235(59.0%) than males 163(41.0%) participated in the study. Many were attending dental school 253(63.6%) while 145(36.4%) were attending non dental schools. All 379(95.2%) students who wished to get married believed that dental appearance can influence the choice of spouse. There was significant association between sex (P<0.001) and wish to get married and type of school (P=0.001) and dental appearance affecting choice of spouse.Conclusion:Many of the study participants wished to get married. Those attending dental school will consider dental appearance when making choice of a spouse and scattered teeth will affect the choice of spouse most negatively

Effect of referral for dental service on dental-service utilization by primary school children aged 8 to 11 years in Enugu, Nigeria

Aim: To determine how one dental education session and referral of study participants aged 8-11 years would affect utilization of oral-health care services. Methods: This descriptive prospective study recruited 1,406 pupils aged 8-11 years from randomly selected primary schools in Enugu metropolis. All pupils received one oral-health education and referral letters for treatment. Data were collected on the pupils' socio-demographic profile, family structure, and history of oral-health care utilization in the 12 months preceding the study and within 12 months of receipt of referral letter. The effect of these factors as predictors of past and recent dental service utilization was determined using logistic regression. Results: Only 4.3% of the study participants had ever used oral-health services in the 12 months prior to the study. Within 12 months of issuing the referral letters, 9.0% of pupils used the oral-health services. Children from middle (AOR: 0.46; CI: 0.29-0.73; p=0.001) and low socioeconomic strata (AOR: 0.21; CI: 0.11-0.39; p<0.001) and those living with relatives/guardians (AOR: 0.08, CI: 0.01-0.56; p=0.01) were still less likely to have utilized oral-health services. Conclusions: Referral of children for oral-health care increased the number of children who utilized oral health care services (Au)