Assessment of Efficacy of Implant Screwdrivers' During Multiple Tightening/ Untightening Cycles. An in vitro Study.

Introduction: It is unclear the number of times a screwdriver may be reused without loosening its efficacy or inducing damage to implant screws while keeping appropriate torque values.

Objective: Evaluate the effect of the screwdriver and internal threads on the tightening efficacy by assessing the reverse torque value (RTV).

Methods: The efficacy was tested with four groups of screws: two titanium groups and two gold-platted (n=5).

Exercise-Induced Reduction in Left Ventricular Ejection Fraction in the Absence of Coronary Artery Disease: Clinical Characteristics and Outcomes.

Background: During exercise stress echocardiography (ESE), there are patients with normal left ventricular ejection fraction (LVEF) who paradoxically develop reduced LVEF during exercise despite absence of coronary artery disease (CAD) and a significant hypertensive response. This study sought to describe the clinical features and outcomes of this population.

Methods: Among ESEs performed between 2003 and 2022, patients without CAD by angiogram within 90 days of ESE and resting LVEF ≥50% with a ≥5% LVEF decrease during ESE were included.

The Detection Rate of Late Gadolinium Enhancement in Takotsubo Syndrome: A Systematic Review and Meta-Analysis.

The absence of late gadolinium enhancement (LGE) on cardiac magnetic resonance (CMR) is commonly used to distinguish takotsubo syndrome (TTS) from other myocardial diseases. However, case series have reported the presence of LGE in TTS. This study aimed to summarize the evidence on the frequency of LGE in TTS and identify potential variables that may influence the detection of LGE.

Direct vs. Indirect Digital Implant Impressions: A Time and Cost Analysis.

Background/objectives: This study aimed to compare the cost and time implications for implant-supported prosthesis comparing three digital impression techniques: digitization with an intraoral scanner, digitization of the conventional impression (without dental casts) and digitization of the stone models.

Methods: To assess the time and cost of digital impression techniques on implants, time records on intraoral scans were consulted and three models were created with one, two and six implants to assess extraoral procedures time. Costs were evaluated based on material consumption, time expenditure and operator-related expenses.

Accuracy of occlusal splints printed in different orientations by liquid crystal display technology: an in vitro study.

Objectives: To evaluate the accuracy of occlusal splints printed in different orientations by liquid crystal display technology.

Methods: An occlusal splint was digitally designed, and additively manufactured using an LCD printer (Phrozen Sonic 4k, Phrozen) at three orientations relative to the printer building plate: 0, 45, and 70 degrees (n=10). The 3D-printed occlusal splints were digitised using a desktop scanner, resulting in experimental meshes.