Accuracy of digital jaw relation determination in different occlusal conditions - an in vitro study.

Objectives: In orthodontics, accurate registration of jaw relationships is essential for correct diagnosis and treatment planning. Therefore, accuracy of the digital spatial registration of maxillary and mandibular models and - for the first time-the influence of dentition stage and malocclusion type on this procedure were investigated under controlled conditions.

Materials And Methods: Eight pairs of jaw models, representing different occlusal and developmental statuses (m1-m8), were scanned using two IOS types (PS: Primescan; TR: Trios4).

Comparison of the accuracy of different types of bite recordings - an in vitro study.

Objectives: Reconstruction of a three-dimensional jaw position determined by a bite recording is an important aspect of prosthetic therapy. Different materials are used for this purpose. In the dental technical workflow, recordings are used to mount a lower jaw cast in a patient-like spatial position relative to the upper jaw cast.

Influence of oral motor tasks on postural muscle activity during dynamic reactive balance.

Background: Jaw clenching improves dynamic reactive balance on an oscillating platform during forward acceleration and is associated with decreased mean sway speed of different body regions.

Objective: It is suggested that jaw clenching as a concurrent muscle activity facilitates human motor excitability, increasing the neural drive to distal muscles. The underlying mechanism behind this phenomenon was studied based on leg and trunk muscle activity (iEMG) and co-contraction ratio (CCR).

Persisting effects of jaw clenching on dynamic steady-state balance.

The effects of jaw clenching on balance has been shown under static steady-state conditions but the effects on dynamic steady-state balance have not yet been investigated. On this basis, the research questions were: 1) if jaw clenching improves dynamic steady-state balance; 2) if the effects persist when the jaw clenching task loses its novelty and the increased attention associated with it; 3) if the improved dynamic steady-state balance performance is associated with decreased muscle activity. A total of 48 physically active healthy adults were assigned to three groups differing in intervention (Jaw clenching and balance training (JBT), only balance training (OBT) or the no-training control group (CON)) and attending two measurement points separated by two weeks.

Hydroxychloroquine can be resumed with close monitoring after retinopathy has developed, without major visual loss: Case Report.

Purpose: To present a patient with systemic lupus erythematosus on longstanding hydroxychloroquine (HCQ) use for whom HCQ was stopped due to signs of toxicity, and then resumed four years later due to dire systemic need.

Methods: Long term retrospective study. Humphrey visual fields (10-2 and 24-2), fundus autofluorescence imaging, and spectral domain OCT were used to follow progression over time.

Effects of jaw clenching on dynamic reactive balance task performance after 1-week of jaw clenching training.

Introduction: Good balance is essential for human daily life as it may help to improve the quality of life and reduce the risk of falls and associated injuries. The influence of jaw clenching on balance control has been shown under static and dynamic conditions. Nevertheless, it has not yet been investigated whether the effects are mainly associated with the dual-task situation or are caused by jaw clenching itself.

Unexpected metallic foreign bodies on panoramic scans - a narrative review.

Background: The digital panoramic radiograph (orthopantomogram, OPG) is the standard radiographic technique for basic diagnostics in dental practice. A correctly taken image provides a good overview of teeth and jaw, whereas radiopaque foreign materials, e. g.

Traumatic carotid-cavernous fistula: A case report.

Direct carotid-cavernous fistulas are a rare complication of craniofacial trauma that often presents with proptosis, chemosis, and other visual symptoms. Disruption of blood flow from a carotid-cavernous fistula can cause cortical and cranial nerve ischemia which requires emergent intervention. Upon clinical suspicion of a carotid-cavernous fistula, patients should undergo computed tomography angiography (CTA) or magnetic resonance angiography (MRA), and digital subtraction angiography (DSA) if no other etiology is suspected.

Influence of Controlled Stomatognathic Motor Activity on Sway, Control and Stability of the Center of Mass During Dynamic Steady-State Balance-An Uncontrolled Manifold Analysis.

Multiple sensory signals from visual, somatosensory and vestibular systems are used for human postural control. To maintain postural stability, the central nervous system keeps the center of mass (CoM) within the base of support. The influence of the stomatognathic motor system on postural control has been established under static conditions, but it has not yet been investigated during dynamic steady-state balance.

Influence of controlled masticatory muscle activity on dynamic reactive balance.

Background: The influence of the stomatognatic system on human posture control has been investigated under static conditions, but the effects on dynamic balance have not yet been considered.

Objective: Investigating the influence of different functional stomatognatic activities (jaw clenching (JAW), tongue pressing (TON) and habitual jaw position (HAB)) on postural performance during a dynamic reactive balance task.

Methods: Forty-eight physically active and healthy adults were assigned to three groups differing in oral-motor tasks (JAW, TON or HAB).

Prosocial behavior during the COVID-19 pandemic in Germany. The role of responsibility and vulnerability.

In two pre-registered and fully incentivized studies ( = 501), we investigate prosocial behavior during the COVID-19 pandemic in Germany. Based on a comparison with pre-pandemic data, Study 1 shows that individuals' general prosociality measured with a (context-independent) Social Value Orientation Slider changed significantly before vs. during the early stage of the pandemic towards increased prosociality.

Altruistic Giving Toward Refugees: Identifying Factors That Increase Citizens' Willingness to Help.

Over the past decade, the world has faced an unprecedented refugee crisis. The large number of incoming refugees represents a challenge for host societies and its citizens triggering reactions from a supportive welcome to brusque rejection and hostile behavior toward refugees. In a pre-registered study, we investigated factors that could promote altruistic behavior in fully incentivized one-shot Dictator Game toward various receiver groups including refugees.

Motor learning might contribute to a therapeutic anterior shift of the habitual mandibular position-An exploratory study.

Background: Passive mandibular advancement with functional appliances is commonly used to treat juvenile patients with mandibular retrognathism.

Objective: The aim of this study was to investigate whether active repetitive training of the mandible into an anterior position would result in a shift of the habitual mandibular position (HMP).

Methods: Twenty adult healthy subjects were randomly assigned to one of two groups: a training group receiving six supervised functional training sessions of 10 min each and a control group without training.

Effects of preventing intercuspation on the precision of jaw movements.

Background: Closing movements are among the jaw's basic physiological motor actions. During functional movements, the jaw changes position continually, which requires appropriate proprioception. However, the significance of the various proprioceptive receptors involved and how they interact is not yet fully clear.