LLUSD Articulator - Volume 29, Number 1

Contents: 4 | Dean’s brown bag6 | Robert Smith’s generous gift8 | Inaugural RDAEF class graduates10 | Zambian miracle13 | Mark Estey new academic dean17 | Esther Valenzuela assistant dean18 | Graham Stacey retires20 | One Homecoming Number 226 | Fostering LLUSD student research34 | Student research winners42 | LLUSD at ASDR46 | Newshttps://scholarsrepository.llu.edu/articulator/1014/thumbnail.jp

BigMouth : development and maintenance of a successful dental data repository

DATA AVAILABILITY : The data underlying this article will be shared on reasonable request to the corresponding author.Few clinical datasets exist in dentistry to conduct secondary research. Hence, a novel dental data repository called BigMouth was developed, which has grown to include 11 academic institutions contributing Electronic Health Record data on over 4.5 million patients. The primary purpose for BigMouth is to serve as a high-quality resource for rapidly conducting oral health-related research. BigMouth allows for assessing the oral health status of a diverse US patient population; provides rationale and evidence for new oral health care delivery modes; and embraces the specific oral health research education mission. A data governance framework that encouraged data sharing while controlling contributed data was initially developed. This transformed over time into a mature framework, including a fee schedule for data requests and allowing access to researchers from noncontributing institutions. Adoption of BigMouth helps to foster new collaborations between clinical, epidemiological, statistical, and informatics experts and provides an additional venue for professional development.The National Library of Medicine.https://academic.oup.com/jamiaam2023Dental Management Science

Analyzing Equivalency and Accuracy of Three Different Periodontal Probes in Measuring Pocket Depth – An In-Vitro Study

ABSTRACTBackground The periodontal probe is an essential instrument designed for the purposes of recording clinical periodontal data. As such, accurate periodontal measurements remain a critical factor in providing individualized care to patients. The purpose of this study is to determine the compatibility and accuracy of three different periodontal probes on a periodontal typodont model.Materials and Methods Forty-one D3, D4, and DH students were randomly selected to perform a 6-point pocket depth measurement on the mandibular teeth of a previously verified periodontal typodont mounted on a manikin. Each measurement site was outlined with black marking on the tooth to facilitate consistent reproducibility in periodontal probe placement and angulation.Results Probing depth measurements between the UNC-15, PCP-126, and Disposable i-PAK® periodontal probe rendered an excellent equivalency (ICC = 0.960) with narrow CI (0.947, 0.971). There is significant difference among these three instruments in their capability to replicate the manufacturer’s suggested probing depth on the periodontal typodont (p < .001). The UNC-15 probe was the most accurate, followed by PCP-126, with the Disposable i-PAK® being the least accurate.Conclusions This study demonstrated that the UNC-15, PCP-126, and Disposable i-PAK® yielded equivalent results when measuring probing depths on a periodontal typodont. Furthermore, the UNC-15 was most accurate in its ability to replicate the manufacturer’s suggested pocket depth on the periodontal typodont.Practical Implications This study emphasizes the importance in consistency of periodontal probe types in the dental practice

Laboratory model to evaluate efficacy of an experimental titanium oxide nanofibers bleaching agent

Objectives: This study aimed to use a laboratory model to evaluate the efficacy of an experimental bleaching agent. Materials and Methods: The model used human extracted molars that were treated and measured for bleaching efficacy. Teeth ( = 50) were distributed into 5 groups: Negative control (NC): immersion in water for 8 hours; Nanofibers (NFs): Experimental titanium dioxide nanofibers with stirring and light activation for 8 hours; Whitestrips (WS): Crest 3D White Glamorous White Whitestrips, 2 applications daily for 30 minutes, 14 days; 1% hydrogen peroxide (HP) standard: 1% hydrogen peroxide for 8 hours; and 30% HP standard: 30% hydrogen peroxide for 8 hours. Instrumental measurements were performed using a spectrophotometer. Results were recorded at baseline, 1-day post-bleaching, and 1-week post-bleaching. Kruskal-Wallis procedure was used to determine differences in color change. Pearson correlation was used to evaluate the relationship between visual and instrumental measurements. Tests of hypotheses were 2-sided with alpha = 0.05. Results: There was no significant difference in color parameters (L1, a1, b1, and shade guide units [SGU]) at baseline ( \u3e 0.05). There was a significant difference among the groups for overall color change (ΔE*ab) and change in shade guide units (ΔSGU) at 1-day and 1-week post-bleaching ( \u3c 0.05). The higher the HP concentration, the higher the color change as expressed in ΔSGU and ΔE*ab. The negative control exceeded the perceptibility threshold of ΔE* = 1.2 regardless of time point. NFs showed a decrease in chroma, but were not statistically different compared to the negative control. Conclusions: The laboratory model was successful in screening an experimental bleaching agent

Micro computed tomography analysis of abrasivity of toothpaste tablets compared to conventional toothpaste

PURPOSE: To evaluate with microCT dentin and enamel abrasion depth caused by toothpaste tablets when compared to conventional toothpastes. METHODS: Dentin (N= 64) and enamel blocks (N=64) were randomized into four experimental groups of 16 specimens each for dentin and enamel. CP: Colgate Cavity Protection, served as the low abrasive toothpaste; AW: Colgate Total Advanced Whitening was used to represent a highly abrasive toothpaste. Two different types of toothpaste tablets were used. DT: Denttabs and BT: Bite tabs. To prepare the slurries, 40 mL of water was added to 25 g of each toothpaste and 4.4 g of each toothpaste tab. Blocks were brushed for a total of 10,000 and 40,000 strokes for dentin and enamel, respectively following ISO standard 11609. On completion of brushing, specimens were scanned with a microCT system. Tomographic 3D reconstruction followed by abrasion depths measurements were performed. Kruskal-Wallis procedure tested abrasion depths among the different groups. Tests of hypotheses were two-sided with an alpha level at 0.05. RESULTS: There was a statistically significant difference in dentin abrasion depth among the groups (P\u3c 0.001). The mean dentin/enamel abrasion depths in microns were 25.3/4.4, 36.8/4.4, 66.8/3.0, and 230.3/15.5 for DT, BT, CP, and AW respectively. Dentin and enamel abrasion depth of AW was the highest and was different from all other groups after multiple comparisons (P\u3c 0.05). CLINICAL SIGNIFICANCE: Dentin abrasivity of toothpaste tabs is negligible as determined with microCT

Comparison of Volumetric Change in Objects Printed with LCD and DLP 3D Printers

ABSTRACTBackground Advances in 3D printing are making a significant impact on the future of dentistry. This study evaluated whether the difference in volumetric change of objects printed with the Anycubic and SprintRay 3D printers was clinically or statistically significant.Methods A maxillary left 1st premolar typodont tooth was scanned with a TRIOSTM intra-oral scanner and then printed using AnycubicTM (N = 20) and SprintRayTM (N = 20) 3D printers for a total of 40 printed objects. The printed premolars were scanned with a TRIOSTM scanner after complete cure (T1 or baseline). Subsequent scans were made at 3-, 6-, 24-, and 48-hour after the T1 scan. The scans at different time intervals from each scanner were superimposed, and the volumetric change among the scans was analyzed and recorded using a matching software (Geomagic WRAP®). The volumetric changes at different time intervals for both printers were analyzed using a Mann-Whitney U test α = 0.05.Results The mean volumetric change of the printed teeth from both AnycubicTM (−1.28 mm3) and SprintRayTM (−3.06 mm3) were minimal and not statistically significantly different from each other at any time points (p > .05).Conclusions Both printers showed no clinically significant volumetric change. Although not a statistically significant difference, the AnycubicTM printed objects demonstrated greater stability in comparison to the SprintRayTM printed objects.Practical Implications This study showed that clinically acceptable accuracy/outcomes of printed objects can be achieved with a lower-cost option, such as an AnycubicTM 3D printer

Oral health knowledge and oral health related quality of life of older adults

OBJECTIVE: To assess the relationship between oral health knowledge and oral health related quality of life among older adults with different ethnicities living in San Bernardino County, California. There is a gap in oral health knowledge (OHK) and how it relates to perceived oral health related quality of life. Thus, there is a need to assess OHK as a component of oral health literacy and identify areas in which knowledge gaps exit to develop educational strategies that address the need of the elderly population. MATERIALS AND METHODS: The study was a cross-sectional study that included adults 65 years and older using a validated Comprehensive Measure of Oral Health Knowledge (CMOHK) and an Oral Health Profile Index (OHIP-14). Odds ratios were conducted to determine the factors associated with OHK. RESULTS: Mean OHK score were 16.8, 14.6, and 8.9 for Caucasian, Asian, and Hispanics, respectively. Poor OHK was significantly associated with participants over the age of 75 years (OR = 1.9; 95% CI: 1.15-3.16), high school education or less (OR = 10.8; 95% CI: 5.92-19.84), minority ethnicity (OR = 7.3; 95% CI: 4.27-12.61), income less than $25,000 (OR = 10.7; 95% CI: 5.92-19.26), and reading ability less than Excellent (OR = 7.27; 95% CI: 4.35-12.14). Mean OHIP-Severity scores were 7.4, 12.5, and 24.4 for Caucasian, Asian, and Hispanics, respectively. Respondents with Poor OHK were 5.17 times more likely to be identified with high levels of severity (Severity \u3e10). CONCLUSION: It is imperative to develop communication strategies to inform older adults on oral health knowledge that provide equal opportunities for all ethnicities