Publications by authors named "Kayoko Ito"

: Undernutrition increases the mortality risk in older persons requiring long-term care; further, it is associated with oral functions such as swallowing and chewing. Moreover, occlusion affects oral function and is crucially involved in nutritional intake. The present study aimed to examine the association between the number of molar occlusions and undernutrition according to body mass index (BMI) in older persons requiring long-term care.

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Background: Nurturing environments have a critical influence on children's language development. It is unclear to what extent nurturing environments in institutions influence children's language development.

Methods: The present study investigated the early lexical development in Japanese children raised in institutional care (IC) (N = 86; 10-33 months; 37 boys) and compared their lexical skills to a large sample of age peers being raised in biological family care (BFC) (N = 1897; 937 boys) using vocabulary checklists.

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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.

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Article Synopsis
  • - This study examined how eating and swallowing functions relate to health outcomes (like hospitalizations or survival) in elderly people living in long-term care in Japan over one year.
  • - Researchers assessed various factors (like drooling, coughing, and tongue movement) and collected demographic information to distinguish between those who experienced death/hospitalization and those who survived.
  • - The findings revealed significant links between certain eating and swallowing issues and health outcomes, suggesting that caregivers could use simple assessments for early detection and intervention to improve care and prevent serious conditions.
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The effects of head and neck alignment and pharyngeal anatomy on epiglottic inversion remain unclear. This study investigated the factors involved in epiglottic inversion, including head and neck alignment and pharyngeal anatomy, in patients with dysphagia. Patients with a chief complaint of dysphagia and who underwent videofluoroscopic swallowing study at our hospital from January to July 2022 were enrolled.

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 The associations of low-density lipoprotein cholesterol (LDL-C) and high-density lipoprotein (HDL-C) with reduced saliva flow rates have not been previously reported.  The present study aimed to assess the association of cholesterolemia with reduced saliva flow rates in community-dwelling elderly subjects.  The present study analyzed 342 participants (170 males and 172 females aged between 78 and 79 years old).

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  • The study focused on how medications can cause xerostomia (dry mouth) and its impact on patient care, stressing the need to treat this condition for effective disease management.
  • The research involved 490 patients with medication-induced xerostomia, assessing various factors like age, medication usage, and mental health, before exploring treatment options such as oral lubricants and herbal remedies.
  • Results showed that 75.3% of patients experienced improvement in their dry mouth symptoms, although those with psychiatric disorders had lower improvement rates, and higher use of anticholinergic medications correlated with lesser improvements.
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  • - The study investigates how declining oral function (OHF) in older adults can influence physical frailty, evaluating the effectiveness of management strategies for patients diagnosed with OHF.
  • - Out of 273 patients aged over 65 assessed for oral function, 31.5% were diagnosed with OHF and received treatments, with 48.8% returning for a follow-up assessment six months later.
  • - Results showed significant improvements in various oral functions, especially occlusal force, indicating that appropriate management can enhance oral health in older adults with OHF.
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Purpose: This study aimed to determine whether denture use contributes to maintaining and improving food forms in long-term care facility (LTCFs) residents.

Methods: In 888 residents of 37 LTCFs in Japan, the following were investigated: nutritional intake status, food forms, age, sex, Barthel index (BI), clinical dementia rating (CDR), number of teeth present, number of occlusal supports, swallowing function, and use of dentures. Among all residents, those who were well-nourished and had ≤9 occlusal supports were analyzed.

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  • This study explored whether older adults in long-term care should change from a normal diet to a dysphagia diet over a year-long period.
  • It utilized various factors like age, sex, BMI, and oral assessments to evaluate dietary needs, finding notable differences in those who switched diets compared to those who didn't.
  • The findings suggest that regular simple assessments can help identify if an older adult needs a different food form to align with their eating and swallowing abilities.
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We examined factors related to dietary intake status (food form) of long-term care facility (LTCF) residents to identify factors related to proper food form choice for older individuals requiring nursing care. We surveyed 888 residents from 37 LTCFs in Japan. We evaluated basic information (age, sex, body mass index [BMI]), food form (swallowing-adjusted diet class), Barthel Index (BI), Clinical Dementia Rating (CDR), simply evaluated eating and swallowing functions, the number of present/functional teeth, oral diadochokinesis, repetitive saliva swallowing test (RSST), and modified water swallowing test.

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Background: Outcome prediction for dysphagia recovery is essential for rehabilitation treatment planning. Several studies have reported various predictors for resuming oral feeding after post-stroke dysphagia. However, evidence on oral health and function, a crucial part of feeding, has rarely been reported.

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Objective: To investigate the association between oral health management (OHM) by dental hygienists and the occurrence of pneumonia, and determine the effectiveness of OHM in pneumonia prevention.

Background: In long-term care facilities in Japan, the need for professional OHM is increasing with an increase in the number of severely debilitated residents.

Materials And Methods: A 1-year prospective multicentre cohort study was conducted using data from 504 residents (63 men; mean age: 87.

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Purpose: This study aimed to determine the association between home visits by a dentist and regular oral hygiene management by a dental hygienist (regular dental management: RDM) and weight loss among older adults in long-term care facilities.

Methods: A total of 468 older residents from 26 Japanese long-term care facilities participated in two surveys in 2018 and 2019. Participants were divided into two groups based on their diet during the baseline survey (regular diet, n = 256; dysphagia diet, n = 212).

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Changing the food form for older adults requiring nursing care from a regular to dysphagia diet is thought to impact their nutritional status. We assessed the association between changes in food form and weight loss over 1 year in older adults. Older adults residing in long-term care facilities in Japan ( = 455) who participated in the baseline (2018) and follow-up (2019) surveys were divided into two groups (regular diet, = 284; dysphagia diet, = 171).

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Objectives: Various oral symptoms, including xerostomia and burning mouth syndrome, may occur in menopausal women. These symptoms reduce quality of life (QOL). However, the actual condition of xerostomia after menopause is not clear.

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Background: Oral hypofunction is defined as the reversible stage preceding oral dysfunction. However, its assessment and management need further examination and consideration.

Objective: The present study aimed to examine the current state of oral hypofunction among outpatients at the university hospital.

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Background: Perimenopausal women experience a wide variety of systemic symptoms: hot flashes, sweating, mental health concerns and various oral sensory complaints (OSC). OSC in perimenopausal women include xerostomia, taste disturbance and burning mouth. However, the factors associated with these OSC have not been identified.

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There is wide variation in chewing behaviours, even among healthy humans. Further, the way in which humans determine swallowing initiation when chewing solid foods remains unclear. The current study sought to investigate how the bolus properties change over time during chewing, and to clarify which factors affect chewing and swallowing behaviours, including swallowing initiation, in healthy humans.

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Article Synopsis
  • Few guidelines exist for modifying food consistency to suit the oral functions of older adults in nursing care settings.
  • This study examined the relationship between the oral, swallowing, and cognitive abilities of 37 nursing home residents and their ability to handle different food consistencies.
  • Results showed that while most could eat pudding easily, only a minority could manage rice crackers, indicating a link between food swallowing ability and the need for assistance at mealtime.
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  • Overactive bladder (OAB) can arise from various causes including neurological issues and xerostomia, which leads to increased water intake.
  • A study using a web-based questionnaire found that 13% of participants had OAB, with a higher prevalence of xerostomia in those with OAB (28.6% vs 10%).
  • The findings suggest that OAB symptoms are associated with xerostomia, indicating that managing dry mouth could be helpful for improving the health of OAB patients.
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  • The clinical features of xerostomia caused by immune checkpoint inhibitors (ICI) resemble those of Sjögren's syndrome (SS), but their immunohistological and serological characteristics differ.
  • A case study of a 56-year-old male showed various imaging results indicating abnormal salivary gland conditions linked to ICI-induced xerostomia.
  • Imaging findings included non-specific results on CT scans, unique patterns on MRI suggesting lymphocyte infiltration, and ultrasound revealing hypoechoic areas, indicating potential differences from typical SS presentations.
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We investigated how the physical properties of food affect chewing kinematics, and examined the effects of aging on behavior. Twenty young and 21 older volunteers were asked to freely chew rice crackers and spit the food out at their average chewing duration. We compared chewing characteristics among the conditions (age × rice cracker), and examined the area of rectified masseter and suprahyoid electromyographic bursts per chewing cycle.

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Background: Previous studies have suggested a significant relationship between hyposalivation and inhalation therapy-induced oropharyngeal problems. However, salivary secretion tests are not widely performed in daily clinical practice. In fact, xerostomia, the complaint of dry mouth, may not indicate hyposalivation.

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Article Synopsis
  • The study examined variations in chewing behaviors among healthy individuals, focusing on the rheological properties of food (specifically a bolus of steamed rice) and the swallowing process.
  • Researchers found that while the time taken to chew varied significantly among participants, the hardness of the bolus decreased consistently over time.
  • Ultimately, the study concluded that the differences in bolus properties based on chewing duration do not impact the actual swallowing process or the initiation of swallowing.
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