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Effect of Dietary Components on the Shear Bond Strength of Orthodontics Brackets after Thermal Aging

Open Journal of Stomatology 2024年第6期14卷 309-315页

作者： Philip Punzalan tanya al talib Anthony Fusco Neamat Hassan Abubakr School of Dental Medicine University of Nevada Las Vegas Nevada USA

Introduction: The stability of orthodontic brackets throughout orthodontic treatment plays a critical role in the treatment’s effectiveness. The present in vitro study was designed to assess the impact of various dietary components on the performance of orthodontic brackets. Methods: Metal orthodontic brackets were bonded to 66 extracted anterior teeth divided into groups based on the solution type: Milk, Gatorade, Cold Coffee, and a control group using water. Each group consisted of 20 teeth except for the control group, which included six teeth. The bracketed teeth were submerged in their respective solutions for 15 minutes three times daily at different intervals to mimic an in vivo environment and were stored in artificial saliva at room temperature (23?C). The specimens underwent artificial aging through 10,000 cycles of thermocycling (representing one clinical year) between 5?C and 55?C. Shade measurements were taken using a VITA Easy Shade device, capturing the classic shade and L*, a*, and b* values. Delta E values were calculated immediately post-bonding and after 7 days, 1 month, 1, and 2 clinical years. The shear bond strength of each bracket was measured using an ultra-tester machine. Results: After two clinical years, significant differences in ΔE color values were observed across all groups, with the most substantial change noted in teeth immersed in cold coffee. Brackets submerged in milk demonstrated lower shear bond strength than other solutions, whereas the control group exhibited the highest shear bond strength (P = 0.01). Conclusion: The study indicates that dietary components significantly influence tooth color stability and the shear bond strength of orthodontic brackets, underscoring the importance of considering these factors in orthodontic treatment planning.

关键词： Shear Bond Orthodontic Brackets Color Stability Thermal Aging

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Retrospective Evaluation of the Prevalence of Diastema among an Adult Population

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Open Journal of Stomatology 2022年第6期12卷 175-182页

作者： Kyle Cousineau tanya al talib Neamat Abubakr Hassan School of Dental Medicine University of Nevada Las Vegas Nevada USA Department of Clinical Sciences School of Dental Medicine University of Nevada Las Vegas Nevada USA Department of Biomedical Sciences School of Dental Medicine University of Nevada Las Vegas Nevada USA

Purpose: With the increased demand for orthodontic treatments in adults, Diastemas have always been an obstacle for either pre or post orthodontic treatment. The purpose of the present investigation is to identify the prevalence and location of diastema among patients attending the dental clinics, School of Dental Medicine, University of Nevada, Las Vegas (UNLV). Methods: A retrospective keywords search of the clinical notes of UNLV School of Dental Medicine (SDM) patient charts in AxiUmTM (dental practice management software) was performed using the search terms “diastema” and “midline diastema” to identify the number of cases that clinically presented with diastema from 1/1/2014-9/30/2020. Demographic data were then analyzed using a Chi-square test and compared against Clark County population data. Results: 1182 patients’ records were identified to have one of the search keywords. 56.7% of the patients who presented with diastema were female, 43.1% were male and 0.2% were transgender. 31.5% of patients presenting with diastema were between the ages of 12 and 19. The majority of the diastema cases were in maxillary teeth, followed by diastema in both maxillary and mandibular. The least number of cases had only mandibular diastema. In regards to size, most (look up percent) were mild diastema (1 - 2 mm), followed by moderate (2 mm) and severe (above 2 mm). The reported ethnicity with highest diastema was Hispanic followed by Caucasians and 17% were African Americans. Chi square analysis showed ethnicity results are statistically significant (p Conclusion: Ethnicity and arch are integral predictors for patients who have diastema.

关键词： Maxillary Midline Diastema Prevalence Diastema

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Retrospective Analysis of the Association of Non-Carious Cervical Lesions with Bruxism

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Open Journal of Stomatology 2020年第2期10卷 11-18页

作者： Angelica Jane Bustos tanya al-talib Neamat Hassan Abubakr School of Dental Medicine University of Nevada Las Vegas Nevada USA Department of Clinical Sciences University of Nevada Las Vegas Nevada USA Department of Biomedical Sciences University of Nevada Las Vegas Nevada USA

Recently, bruxism became the center of attention for the etiological research of non-carious cervical lesions (NCCLs). The present study aims to investigate the presence and types of NCCLs associated with bruxism. Retrospective keywords search of the clinical notes of all patient charts in axiUmTM was performed using the terms “bruxism”, “attrition”, “abrasion”, “erosion”, and “abfraction”. all bruxer patients 18 years and older who presented to the UNLV School of Dental Medicine (01/01/2014 to 09/30/2018) with the complete record were included. To determine the statistical analysis implications, the chi-square test was used. Commonest types of NCCL associated with bruxism were attrition and abfraction. Five hundred seventeen cases had multifactorial lesions. Anterior maxillary teeth followed by mandibular anterior were the most affected teeth. Abfraction lesions were mainly sighted in maxillary premolars, followed by maxillary canines. Within the limitation of the present investigation, it was concluded that attrition and abfraction were highly associated with bruxism.

关键词： Bruxism Non-Carious Cervical Lesions (NCCLs) Attrition Abfraction

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Retrospective Analysis of the Correlation between TMD, Headache and Bruxism

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Open Journal of Stomatology 2023年第4期13卷 125-133页

作者： Audrey Morris Patricia Grabowski tanya al talib Neamat Hassan Abubakr School of Dental Medicine University of Nevada Las Vegas Nevada USA

Aims: To evaluate the association between bruxism, headaches, and temporomandibular disorder (TMD). Methods: A keyword search of the clinical notes of patients’ charts in AxiUmTM was performed using the search terms “TMD”, “headache”, and “sleep bruxism” to identify these patients. The inclusion criteria were patients with partial of full dentition, aged 18 to 65 years old who attended the UNLV School of Dental Medicine clinics between January 2014 and September 2018. Patients with incomplete records and those who were completely edentulous formed the exclusion criteria. Data were analyzed using the Pearson Correlation Coefficient. Results: The final sample was made up of 529 patients. The highest percentage of study subjects were in the age range of 29 - 34 (17.9%), with a statistically significant correlation to pain on opening (P = 0.0403). Females showed a statistically significant correlation to TMJ clicking (P = 0.0033). Caucasians also had a statistically significant correlation to TMJ clicking (P = 0.0001). In addition, a statistically significant correlation between pain on opening or chewing and headaches was also observed (P = 0.0081). Conclusion: Within the limitations of the present study, Caucasians, and females presented with more TMJ clicking than the other study subjects. Young adults, in particular, experienced more pain on opening or chewing.

关键词： TMD Bruxism Headaches TMJ Clicking Pain

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Performance of Different Orthodontic Brackets after Exposure to Dietary Components: An <i>in Vitro</i>Pilot Study

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Open Journal of Stomatology 2021年第9期11卷 341-348页

作者： Anthony Fusco Syed Ahmed Jared Link tanya al-talib Neamat Hassan Abubakr DMD School of Dental Medicine University of Nevada Las Vegas NV USA Department of Clinical Sciences School of Dental Medicine University of Nevada Las Vegas NV USA Department of Biomedical Sciences School of Dental Medicine University of Nevada Las Vegas NV USA

Introduction: The aim of this study was to determine whether there was a significant difference in shear bond strength between metal and ceramic brackets when exposed to acidic dietary components (beverages) and to observe the chromogenic potential of each in vitro. Methods: Metal and clear orthodontic brackets were placed on extracted maxillary second premolars and exposed to select beverages three times daily for four weeks. Shade was taken using a colorimeter device at seven intervals and the shear bond strength of each bracket was recorded. Results: There was a variable change in tooth shade with respect to the various beverages in which they were submerged. Coffee and Dr. Pepper had the most pronounced change, whereas Red Bull and water produced little to none, respectively. Compared to controls, brackets submerged in coffee had the greatest reduction in shear bond strength, followed by Dr. Pepper, then Red Bull. Overall, clear brackets showed higher shear bond strength than metal brackets. Conclusion: Acidic dietary components have a negative effect on the shear bond strength of orthodontic brackets, and more pigmented beverages have a higher chromogenic staining potential.

关键词： Bracket Shear Bond Strength Orthodontics Tooth Shade

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