Background. Bracket base design is a factor influencing shear bond strength. High shear bond strength leads to enamel crack formation during debonding. The aim of this study was to compare enamel damage variations, including the number and length of enamel cracks after debonding of two different base designs.
Methods. Eighty-eight extracted human premolars were randomly divided into2 groups (n=44). The teeth in each group were bonded by two types of brackets with different base designs: 80-gauge mesh design versus anchor pylon design with pylons for adhesive retention. The number and length of enamel cracks before bonding and after debonding were evaluated under an optical stereomicroscope ×40 in both groups. Mann-Whitney U test was used to compare the number of cracks between the two groups. ANCOVA was used for comparison of crack lengths after and before debonding in each group and between the two groups.
Results. There was a significant increase in enamel crack length and numbers in each group after debonding. There was no significant difference in enamel crack numbers after debonding between the two groups, whereas the length of enamel cracks was significantly greater in anchor pylon base design after debonding.
Conclusion. Bracket bases with pylon design for adhesive retention caused more iatrogenic debonding damage to enamel surface.
Impacted canines are prevalent and most of the time palatally positioned. Traction of impacted canine is performed by various methods. The aim of this study is to present a new method for impacted canines' traction which is safe, hygienic and also applying light continuous force. This novel cantilever spring which is made of 0.014-inch stainless steel wire, is beneficial to be used in cases of canine impaction because of its safety and low force/deflection ratio.
Objectives:
This study aims to assess compliance with evidence-based criteria regarding oral hygiene principle education provided for children and adolescents in the Tabriz Faculty of Dentistry.
Introduction:
Oral health problems might lead to lowering the quality of life amongst children and adolescents; so, providing education regarding oral health principles is of great importance.
Methods:
Eight audit criteria were assessed using the JBI Practical Application of Clinical Evidence System and Getting Research into Practice audit and feedback tool. Barriers were identified and dental students and staff were instructed by the team members and asked to educate children and adolescents referred to orthodontic department about oral hygiene practices. Changes in audit criteria were collected by direct observation and interview and reported using descriptive statistics.
Results:
In the follow-up phase, the percentage of patients who were advised to brush their teeth with fluoride toothpaste twice a day, floss daily, and seek regular dental check-ups increased, as compared with the baseline audit (37, 43 and 33%, respectively). Professional fluoride application, fissure sealant and individualized intervention and/or prevention treatment plans increased by 30, 35 and 15%, respectively in the follow-up phase; while advice on diet and risks of alcohol, tobacco and smoking increased by 93%.
Conclusion:
The use of standard clinical audit tools in dentistry wards causes improvement in the compliance with providing oral hygiene principle instructions among dental students and staff. Standard tools can increase the effectiveness of corrective interventions by identifying weaknesses in the patient care process correctly.
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