Unpacking the COVID-19 roadway fatality paradox: an analysis of motor vehicle crashes in Michigan 2019-2022.

Objectives: Motor vehicle travel shifts during the COVID-19 pandemic resulted in fewer vehicle miles traveled yet paradoxically higher fatality rates. Anecdotally, the paradox was blamed on increases in risky behavior in the absence of regular traffic and enforcement. We examined three hypotheses to explain the fatality paradox using Michigan crash data: (1) lack of congestion led to higher-speed impacts; (2) increased risky driver/driving; and (3) low-risk driving miles decreased.

Understanding the new trends in pedestrian injury distribution and mechanism through data linkage and modeling.

The objectives of this study were to 1) collect and analyze recent pedestrian crash cases for better understanding of the pedestrian injury distribution and mechanism, 2) use computational simulations to reconstruct pedestrian cases and estimate potential benefit of pedestrian automatic emergency braking (PedAEB) in reducing pedestrian injury risks, and 3) estimate how future pedestrian crash distribution might influence priorities for pedestrian protection. Analyses of national crash-injury dataset showed that the overall number of pedestrians in crashes as well as the serious and fatal pedestrian injuries in the U.S.

Evaluation of the predicted vs. achieved occlusal outcomes with the Invisalign® appliance: A retrospective investigation of adult patients.

Introduction: The aim of this study was to investigate the relationship between occlusal contacts, overbite, transverse expansion, and the buccolingual inclination of the teeth with reference to the predicted treatment outcomes and achieved outcomes related to the use of the Invisalign® appliance in mild-to-moderate Class I malocclusions.

Material And Methods: The occlusal contacts, overbite, the buccolingual inclination and transverse expansion of the maxillary arch of adult patients satisfying inclusion and exclusion criteria were measured at the initial (pre-treatment), predicted, and achieved treatment stages using metrology software. Pearson correlation coefficients and regression equations were calculated to determine the association between the initial, predicted and achieved changes in occlusal contact against the other variables.

Occlusal contacts and treatment with the Invisalign appliance: a retrospective analysis of predicted vs achieved outcomes.

Objectives: To quantify the predicted occlusal contact outcomes compared with the clinically achieved occlusal contacts following treatment using the Invisalign aligner appliance.

Materials And Methods: The occlusal contacts of 33 adult patients presenting with a Class I mild-to-moderate malocclusion (spacing <4 mm or crowding of <6 mm) and treated using the Invisalign appliance were measured at the initial, predicted, and achieved stages of treatment by the metrology software Geomagic Control X. Assessed measurements were related to individual teeth and anterior, posterior, and overall contacts.

Classification of motor vehicle crash injury severity: A hybrid approach for imbalanced data.

This study aims to classify the injury severity in motor-vehicle crashes with both high accuracy and sensitivity rates. The dataset used in this study contains 297,113 vehicle crashes, obtained from the Michigan Traffic Crash Facts (MTCF) dataset, from 2016-2017. Similar to any other crash dataset, different accident severity classes are not equally represented in MTCF.

Pilot Study Comparing Nasal vs Oral Intubation for Dental Surgery by Physicians, Nurse Anesthetists, and Trainees.

The purpose of this article was to determine if pediatric dental treatment under general anesthesia utilizing orotracheal intubation takes longer than using nasotracheal intubation techniques. Twenty-six American Society of Anesthesiologists Physical Status Classification I and II pediatric dental patients, ages 2-8 years treated under general anesthesia, were assigned to 1 of 2 groups: (a) nasotracheal intubation (control, n = 13), (b) orotracheal intubation (experimental, n = 13). Times for intubation, radiographic imaging, and dental procedures, as well as total case time were quantified.

Periodontal Referral Patterns in Australia: 2000 Versus 2015.

Background: A previous study investigated differences in the severity of periodontal disease on referral for specialist care between 1980 and 2000 across the United States. The present study finds patients referred in 2000 had greater severity of periodontal disease than those referred 20 years ago.

Methods: A retrospective analysis of 384 charts was completed from three periodontal practices across the east coast of Australia.

The Impact of Michigan's Partial Repeal of the Universal Motorcycle Helmet Law on Helmet Use, Fatalities, and Head Injuries.

Objectives: To evaluate the impact of the partial repeal of Michigan's universal motorcycle helmet law on helmet use, fatalities, and head injuries.

Methods: We compared helmet use rates and motorcycle crash fatality risk for the 12 months before and after the April 13, 2012, repeal with a statewide police-reported crash data set. We linked police-reported crashes to injured riders in a statewide trauma registry.