Relationship between body mass index and masticatory factors evaluated with a wearable device.

Numerous studies have evaluated the relationship between eating behavior and obesity, however few studies have objectively assessed eating behavior. Additionally, the association of masticatory behaviors with masticatory performance remains unclear. This study aimed to verify the relationship between masticatory performance and behavior measured by a wearable masticatory counter, and BMI.

Reliability of a novel wearable device to measure chewing frequency.

Purpose In recent years, the chewing frequency, i.e., the number of chewing cycles, has decreased owing to changes in dietary habits.

Usefulness of a rotation-revolution mixer for mixing powder-liquid reline material.

Purpose: The purpose of this study was to evaluate the distribution of bubbles, degree of mixing, flowability and mechanical strength of powder-liquid reline material by manually and with a rotation-revolution (planetary) mixer, and to determine the usefulness of a rotation-revolution mixer for this application.

Methods: Powder-liquid reline material (Mild Rebaron, GC, Tokyo, Japan) was mixed with a powder to liquid ratio of 1:0.62 according to the manufacturer's instruction.

Risk factor analysis of vasovagal reaction from blood donation.

Background: Vasovagal reaction (VVR) is the most frequent side effect at blood collection sites.

Aims: To protect donors, factors contributing to VVR were analysed.

Materials And Methods: Complications following whole blood and apheresis donations have been recorded and accumulated by the Japanese Red Cross Tokyo Blood Centre.