Kinematic classification of mandibular movements in patients with temporomandibular disorders based on PCA.

This retrospective study aimed to kinematically classify mandibular movements collected during Temporomandibular Disorders (TMD) treatment, employing Fourier transformation (FT), Principal Component Analysis (PCA), and K-means clustering (k-means), and to investigate their correlation with symptoms of pain-related TMD. The study included five TMD participants diagnosed with myalgia (age: 39-86 years, with an SD of 18.96) and three healthy participants (age: 32-42 years, with an SD of 5.

Effects of phototherapy in patients with idiopathic facial palsy: Scoping review.

Phototherapy has emerged as a promising treatment for Bell's palsy, offering potential improvements in facial nerve function and overall well-being. In this study, we selected seven relevant studies involving 306 patients with subacute or acute Bell's palsy from PubMed, EMBASE, Web of Science, and Scopus before June 5, 2024. Low-level laser therapy (LLLT) efficacy for facial nerve paralysis was assessed in seven studies.

Reduction of aerosol and droplet dispersions using intraoral and extraoral vacuums for dental treatments with face-up, diagonal and upright positions.

Purpose: The COVID-19 pandemic has affected lives and dental treatment. Aerosols and droplets generated during dental treatment present a risk of infection for dental care workers. However, detailed elucidation of the conditions under which those are generated has yet to be presented, and no clear countermeasures for protection have been established.

Longitudinal association between posterior occlusal contact and dementia development in a large retrospective cohort study using a Japanese claims database.

This study examines the association between posterior occlusal contact and the risk of dementia development in the Japanese population, utilizing Eichner classification to evaluate occlusal status. Data from Japanese health insurance claims were analyzed for the period from April 2016 to March 2022. Participants had undergone specific health checkups, had no prior history of dementia, and were classified according to their dental occlusal contact.

Fibroblast-derived IL-33 exacerbates orofacial neuropathic pain via the activation of TRPA1 in trigeminal ganglion neurons.

Damage to the peripheral nerves of trigeminal ganglion (TG) neurons leads to intractable orofacial neuropathic pain through the induction of neuroinflammation. However, the details of this process are not yet fully understood. Here, we found that fibroblast-derived interleukin (IL)-33 was required for the development of mechanical allodynia in whisker pad skin following infraorbital nerve injury (IONI).

Orthodontic management of severe inversely impacted maxillary central incisors: a case series.

Background: Abnormal positioning and dislocation of the central incisor can disturb tooth eruption. Generally, inversely impacted maxillary central incisors do not erupt naturally. Performing traction and applied extrusion of an inversely impacted maxillary central incisor with a high inclination angle of the crown is challenging.

Home blood pressure control and prescribing patterns of anti-hypertensive medications in a home blood pressure-based hypertension-specialized clinic in Japan: a sub-analysis of the Ohasama study.

Although the benefits of anti-hypertensive treatment are well known, the proportion of hypertensive patients with controlled blood pressure (BP) remains suboptimal. The present study aimed to compare BP control conditions in a hypertension-specialized clinic and non-hypertension-specialized clinics. This cross-sectional study used data from 379 treated patients who measured home BP in the Ohasama study between 2016 and 2019 (men: 43.

Food group intakes and high-sensitivity C-reactive protein among community-dwelling Japanese adults: a cross-sectional study.

Objective: Healthy dietary patterns have been linked to lower levels of chronic inflammation. The present study aimed to investigate the associations between food group intakes and high-sensitivity C-reactive protein (hsCRP) among community-dwelling adults.

Design: Cross-sectional.

Present state and perceived future use of teledentistry in long-term care facilities in Japan: A cross-sectional study.

Objectives: Teledentistry could be effective in managing oral health through the provision of oral hygiene instruction and diagnostic services. This study aimed to assess the perception and usefulness of teledentistry in Japanese long-term care facilities.

Methods: We conducted a questionnaire survey to compare related factors of the usefulness of teledentistry and identify issues in its implementation.

Cementocyte-derived extracellular vesicles regulate osteoclastogenesis and osteoblastogenesis.

Background/purpose: Cementum shares many properties with bone; however, in contrast to bone, it is not innervated or vascularized and has a limited capacity for remodeling. Osteocytes located in the lacunae-canalicular system of bone tissue play a central role in bone remodeling by communicating with osteoblasts and osteoclasts. Although cementocytes are present in cellular cementum and are morphologically similar to osteocytes, it remains unclear whether they are involved in the dynamic functional regulation of metabolism in cementum.

Public Periodontal Screening Increases Subsequent Regular Dental Visits: The Life Study.

Introduction: A public oral health screening, periodontal disease screening, has been implemented in Japan, but it remains unclear whether screening encourages subsequent regular dental visits. This study aimed to examine whether people who underwent periodontal disease screening were more likely to regularly visit dentists after undergoing the screening than before using a difference-in-differences (DID) approach.

Methods: This study used health care claims data of municipality residents who underwent periodontal disease screening in 2017 or 2018.

Secondhand tobacco exposure assessed using urinary cotinine among 10-year-old children in Japan: An 11-year repeated cross-sectional study.

Introduction: The emergence of heated tobacco products (HTPs) has made it important to monitor HTP-generated aerosols in addition to combustible cigarette (CC) smoke as a source of secondhand tobacco (SHT) exposure. We investigated the trend of SHT exposure in school-aged children and assessed whether SHT exposure depended on household tobacco use status.

Methods: This repeated cross-sectional study from 2011 to 2021 (15,927 participants) was based on data from an annual survey of fourth-grade students (aged 10 years) in Kumagaya City, Japan.

Number of Teeth and Dementia-free Life Expectancy: A 10-Year Follow-Up Study from the Japan Gerontological Evaluation Study.

Objectives: Previous studies have reported that tooth loss is associated with an increased risk of dementia; however, few have explored the association between number of teeth and dementia-free and total life expectancies. We investigated whether having more teeth is associated with longer dementia-free and total life expectancies.

Design: A 10-year follow-up prospective cohort study from 2010 to 2020.

Usefulness and caveats of real-world data for research on hypertension and its association with cardiovascular or renal disease in Japan.

The role of real-world data, collected from clinical practice rather than clinical trials, has become increasingly important for investigating real-life situations, such as treatment effects. In Japan, evidence on hypertension, cardiovascular diseases, and kidney diseases using real-world data is increasing. These studies are mainly based on "the insurer-based real-world data" collected as electronic records, including data from health check-ups and medical claims such as JMDC database, DeSC database, the Japan Health Insurance Association (JHIA) database, or National Databases of Health Insurance Claims and Specific Health Checkups (NDB).

Induced pluripotent stem cell-derived neural stem cells promote bone formation in mice with calvarial defects.

Nerve-derived factors have attracted attention in bone regeneration therapy due to their ability to promote bone regeneration and nerve innervation. Mesenchymal stem cells transported to target sites promote osteogenesis. However, there are few reports on the effects of neural stem cells on bone regeneration.

Changes in three-dimensional nasal morphology according to the direction of maxillary movement during Le Fort I osteotomy.

Background: Le Fort I (LFI) osteotomy is commonly performed by orthognathic surgeons; however, postoperative changes in nasolabial morphology are of concern. Several factors influence such changes, but it is difficult to accurately predict the postoperative results. This study evaluated the three-dimensional (3D) morphological changes in the nasal region according to the different directions of maxillary movement during LFI osteotomy.

Surgery-early approach combined with condylectomy for correction of severe facial asymmetry with mandibular condylar hyperplasia: a case report.

In patients with unilateral mandibular condyle hyperplasia, whether to perform condylectomy and orthognathic surgical procedures at the same time or orthognathic surgery in two stages for remains controversial. Reported here is a case of facial asymmetry with mandibular condyle hyperplasia, for which condylectomy and orthognathic surgery procedures were performed at the same time. A 28-year-old woman was presented to our department with chief complaints of left deviation of the mandible and right temporomandibular joint (TMJ) noise.