Effect of Cognitive Decline on Mandibular Movement during Mastication in Nursing Home Residents.

Background: Many studies have reported on the relationship between cognitive and masticatory functions. However, it remains unclear how the mandibular movements change during chewing in facility residents as dementia progresses. This study aimed to investigate the relationship between a kinematic analysis of mandibular movement during mastication and cognitive function in facility residents. Methods: Sixty-three participants were included from two long-term care facilities. The primary outcome variable was the kinematic data of mandibular movement during mastication. The participants chewed rice crackers, and their faces were recorded during this motion. The partial correlation coefficient between kinematic data and cognitive function was calculated. Furthermore, group comparisons were performed after dividing the participants into three groups based on their cognitive function. Results: Circular motion frequency was significantly correlated with the ABC dementia scale, even after adjusting for the appendicular skeletal muscle index, Eichner index, and short-form mini-nutritional assessment. The cycle and circular motion frequencies were markedly lower in the severe dementia group than in the mild dementia group. Conclusions: With declining cognitive function, mandibular movements during mastication decrease in circular motion and increase in linear motion. Additionally, our results suggested that residents with severe cognitive impairment had more linear mandibular motions during mastication than those with mild cognitive impairment. This may make it more difficult for residents with cognitive decline to ingest normal solid foods.

Weight loss and functional decline in older Japanese people: A cohort study using large-scale claims data.

BACKGROUND: The association between weight loss and subsequent functional decline is uncertain. The study aims to elucidate the association between weight loss over a year and subsequent functional decline requiring assistance in performing their activities of daily living in older individuals. METHODS: The study used data from the publicly funded Long-Term Care Insurance service in Japan, which provides coverage for long-term care services for individuals unable to perform activities of daily living due to physical or cognitive impairment. The study enrolled people born in or before 1949, who underwent health checkups in both 2014 and 2015. The participants were followed from 2015 to the worsening of functional decline requiring long-term care services, death, or February 28, 2019, whichever occurred first. The risk of subsequent functional decline in each weight loss category was estimated using a Cox regression model adjusted for age, sex, baseline body mass index, smoking, and Charlson comorbidity index. RESULTS: We identified 67,452 eligible individuals from the database. The median follow-up period was 1,284 days. The hazard ratios (95 % confidence interval) of functional decline for -1 %, -2 %, -3 %, -4 %, and ≤-5% weight change compared to 0 % weight change were 1.17 (1.03-1.32), 1.26 (1.11-1.43), 1.29 (1.12-1.49), 1.61 (1.39-1.87), and 1.79 (1.58-1.99), respectively. CONCLUSIONS AND IMPLICATIONS: Older people with weight loss of 1 % or more were at risk of functional decline. Close weight monitoring may serve as an easy and inexpensive means of identifying older individuals at risk of functional decline.

Saturation of Percutaneous Oxygen Decreases with Meal Consumption in Patients with Acute Pneumonia.

OBJECTIVE: This study aimed to investigate how respiratory status may be affected during meal consumption in patients with acute pneumonia, mainly aspiration pneumonia, using percutaneous oxygen saturation (SpO2) and pulse rate (PR) measurements. METHODS: We recruited 44 inpatients at the Towada City Hospital and divided them into 'pneumonia' and 'control' groups. Generalized linear mixed effects model was used for analysis. The pneumonia group comprised 22 patients (mean age 81.2 ± 7.0 years, body mass index [BMI] 21.1 ± 4.0 kg/m2) with 1-3 points A-DROP scores. The control group comprised 22 patients (mean age 80.5 ± 4.9 years, BMI 20.9 ± 2.9 kg/m2) with no obvious respiratory diseases. SpO2 and PR were measured 30 min before, during, and 30 min after meals. RESULTS: SpO2 was significantly lower during meals in the pneumonia group (-1.60%; 95% confidence interval = -2.76 to -0.44). There were no significant changes in PR during or after meals in the pneumonia group. CONCLUSIONS: This study suggests pneumonia may worsen respiratory status during meal intake. Patients with pneumonia may be unable to eat adequately due to worsened oxygenation during meals, even in the absence of aspiration. Therefore, it is important to observe whether there is a decrease in respiratory status during meals.

Infantile umbilical hernia tape fixation method without compression materials.

Background: Compression therapy using compression material is often used for umbilical hernias in infants; however, there are problems regarding its use, such as appearance and cost. In our hospital, we use the tape fixation method without compression materials. We report the effectiveness of this method, its significance in measuring the degree of hernia bulge before treatment, and parent satisfaction with the treatment. Methods: We analyzed 77 cases of umbilical hernias (41 boys and 36 girls, mean age 52.7 ± 18.3 days) that were treated with the tape fixation method at the Department of Pediatrics of our hospital. Hernia size was classified based on the height of the bulge: mild (<1 cm), moderate (1≦ and <3 cm), or severe (>3 cm). Treatment duration was compared between the groups using the Steel-Dwass test. After the treatment, a questionnaire was mailed to the parents to assess the treatment satisfaction. Results: Seventy-three patients (94.8%) achieved closure of the hernia orifice, with no excess skin and a well-shaped umbilicus. The duration of treatment was significantly shorter, with the following order: mild (18.5 ± 8.2 days), moderate (25.0 ± 11.9 days), and severe cases (47.8 ± 11.7 days). According to the questionnaire, 97.5% of the parents were satisfied with the treatment. Conclusions: Our tape fixation method without compression material achieved a high closure rate and a good shape of the umbilicus. In addition, we noted that the height of the hernia bulge can be used as a guide to estimate the duration of treatment.

Risk of post-extraction bleeding with direct oral anticoagulant compared with warfarin: Retrospective cohort study using large scale claims data in Japan.

INTRODUCTION: Comparative safety of direct oral anticoagulants vs. warfarin in patients undergoing tooth extraction remains unclear. We compared the incidence of post-extraction bleeding between patients taking warfarin and those taking direct oral anticoagulants (DOACs) using administrative claims data. MATERIALS AND METHODS: We identified outpatients on anticoagulant therapy who underwent permanent tooth extraction between 2015 and 2020 and categorized them into the warfarin and DOAC groups based on medication prescribed within six months prior to tooth extraction. We used the overlap propensity score weighting method to balance the baseline characteristics between the groups and compared the incidence of post-extraction bleeding within seven days after tooth extraction. RESULTS: Among 5253 eligible patients, those in the DOAC group (n = 3696) were older and less frequently prescribed antiplatelets than those in the warfarin group (n = 1557). The distribution of tooth extraction type and number of teeth extracted in a single procedure did not differ between the groups. The unadjusted incidences of post-extraction bleeding in the warfarin and DOAC groups were 35 (2.2 %) and 71 (1.9 %), respectively. Moreover, the overlap weighting analysis showed that the adjusted odds ratio of post-extraction bleeding in the DOAC group in comparison with that in the warfarin group was 0.84 (95 % confidence interval, 0.54-1.31). CONCLUSION: The incidence of post-extraction bleeding in patients taking DOACs was comparable to that in patients taking warfarin. The findings suggest that dentists and physicians should exercise the same degree of caution when extracting teeth in patients on DOACs and those on warfarin in terms of post-extraction bleeding.

Complete Lateral Positioning Enabled Feeding in a Patient with Aspiration Pneumonia.

The complete lateral position can be used to widen the lateral pharynx in a direction that facilitates swallowing and reduces the risk of aspiration, even if the patient is unable to eat in the sitting position. Here, we report a case of aspiration pneumonia in a patient who was unable to eat in the sitting position after swallowing endoscopy, but was able to eat in the complete lateral position. By employing complete lateral positioning, more patients may be able to continue oral intake.

Implications for clinical dental practice during the coronavirus disease pandemic: A scoping review.

PURPOSE: It is over a year since the first case of coronavirus disease (COVID-19) was confirmed in China. This paper reviews and summarizes the characteristics of COVID-19, as understood of December 2020, from a dental perspective. STUDY SELECTION: The PubMed and Scopus online databases were searched using a combination of free words and Medical Subject Headings terms: "dentist" OR "oral care" AND "COVID-19" OR "SARS-CoV-2." RESULTS: Older people and those with underlying medical conditions have an increased risk of serious illness due to COVID-19. The virus enters the body by binding to the angiotensin-converting enzyme 2 (ACE2) receptor. It is common for people with COVID-19 to have mild or no symptoms. Moreover, the disease is not contagious in most infected people; it is only highly contagious in some infected people, thereby forming clusters. Due to the large number of virus particles that are shed prior to the onset of symptoms of the disease, retrospective surveys are important. Appropriate personal protective equipment against corona vortices is also important in clinical practice. Although polymerase chain reaction tests are useful for confirming infection in suspected individuals, their reliability is questionable. In addition, concerns regarding long-term sequelae have been reported. CONCLUSION: There are few high-quality reports on the implications of COVID-19 in dental practice. However, reports suggest that insufficient oral hygiene may be a risk factor for infection. Reports that ACE2 receptors are abundant in the oral cavity also suggest the importance of oral care.

Familial Mediterranean Fever with Psychiatric Disorder which Have not Been Diagnosed over 30 Years: A Case Report.

Familial Mediterranean fever (FMF) is an inherited autoimmune disease characterized by periodic fevers and serositis. Most cases have been diagnosed within 10 years or less; however, there have been no reports of cases in which diagnosis was delayed for several decades. In this study, we encountered a case of FMF in which the patient had recurrent unexplained fevers since childhood, but diagnosis was delayed for more than 30 years due to a psychiatric disorder. Our findings showed that a possible reasons for this delay are possibility of neglect or parenting skills issues, little knowledge of FMF in Japan and the lack of social connections due to the patient's underlying mental illness. We suggest that it is important to conduct a thorough medical interview to identify FMF, as it may go undiagnosed, especially when the patient has few social ties.

Acute Cholecystitis, Sepsis, and Disseminated Intravascular Coagulation Caused by Edwardsiella tarda in an Elderly Woman.

Edwardsiella tarda is a gram-negative bacillus associated with gastrointestinal diseases. It is rarely responsible for sepsis; however, the fatality is very high. Only two cases of E. tarda infections in patients over 90 years of age have been reported; these are not cases of sepsis associated with acute cholecystitis. We report a case of acute cholecystitis, sepsis, and disseminated intravascular coagulation (DIC) caused by E. tarda in a super-elderly woman aged over 90 years. There could be a possibility for recovery from sepsis and DIC if antimicrobial treatment responsiveness is ensured in the super-elderly.

Swallowing evaluation by the Kuchikara Taberu Balance Chart and videoendscopic examination reveals that respiratory conditions, chewing, and position are strongly related to dysphagia.

This study focused on the Kuchikara Taberu Balance Chart (KTBC) as a tool for swallowing function evaluation. To clarify the relationship between videoendoscopic (VE) examination of swallowing function and the KTBC, we compared median KTBC scores with and without laryngeal penetration identified by VE. Sixty-five patients with a mean age of 84.3 ± 7.9 years were examined at the Towada City Hospital. The patients were classified into groups based on laryngeal penetration, including 28 patients with and 37 patients without penetration. We found no significant differences in patient backgrounds. The median KTBC score (interquartile range) was 36.5 (31-44.5) in the group with laryngeal penetration and 42 (35-48.5) in the group without penetration, but the scores were not significantly different (level of statistical significance at α = 0.0036 determined by the Bonferroni correction method) when compared with the Mann-Whitney U test (36.5 vs. 42, z = -2.33, p = 0.020). The median respiratory condition (3 vs. 4, z = - 3.23; p < 0.0036), oral preparatory and propulsive phases (3 vs. 4, z = - 2.96; p < 0.0036), and position and endurance (1 vs. 3, z = - 3.25; p < 0.0036) scores were significantly lower in the group with laryngeal penetration. This study revealed a correlation between laryngeal penetration confirmed by VE and KTBC scores. Consequently, respiratory condition, oral preparatory and propulsive phases, and position and endurance may be useful as tools for the assessment of swallowing. In particular, we recommend adding respiratory status to dysphagia screening.

Significant cases of central cusps, enamel pits, and oral fibromas in tuberous sclerosis complex.

Tuberous sclerosis complex (TSC) is an autosomal dominant disorder in which benign nodular tumors form in the cerebral cortex, cerebellum, and throughout the body causing various symptoms. In this study, we summarized the incidence of dental findings in patients with TSC at our hospital and its association with diseases in various organs. Patients diagnosed with TSC at our hospital between January 2013 and September 2017, and who were examined in the dental and oral surgery department were included in this study. The presence of intraoral manifestations (central cusps, enamel pits, oral fibromas) was examined by means of visual inspection, intraoral photography, and X-ray photography. In addition, the relationship with associated diseases (neurological, cutaneous, cardiac, renal, and pulmonary) according to organ and disease severity was examined. The mean age (± SD) of the 42 TSC patients (19 men and 23 women) was 27.8 ± 14.6 years, of which 24 patients (11 men and 13 women) presented with oral manifestations. Of these patients, seven had central cusps, 10 had enamel pits, and 17 had oral fibromas. The group with central cusps had significantly higher neurological issues in the relationship between intraoral manifestations and associated disease based on the involved organ. The prevalence of central cusps in TSC was 16.7%, which is significantly higher than the 2.6% reported in healthy Japanese subjects. The central cusp is a diagnostic factor alongside the presence of enamel pits and oral fibromas, which can aid in the early diagnosis of TSC by dentists.

Cost of establishing a general dentistry department in a small or medium-sized hospital.

To contribute to future dental healthcare policies, this study compiled data on hospital expenses and follow-ups conducted after a hospital dentistry department was established. In addition, the management status and reports on the utility and challenges of establishing a dentistry department were analyzed. The dentistry department was established through fund raising and inaugurated in May 2009. The depreciation period was set at 7 years, and income and expenditure during the 7 years 8 months after opening were compiled. In total, 17.22 million yen was needed for the dentistry department. The average income from dental care was 21.59 million yen per year, and expenditure amounted to 21.54 million yen per year. The findings indicated that a general dentist able to systemically manage patients was essential in a chronic-care hospital. Moreover, the present findings indicate that if general dentistry consultations were performed without excessive investments, after adjusting for personnel expenses, such an initiative would neither yield considerable income nor produce a substantial deficit. Finally, it is imperative to develop staff who are familiar with the costs and management of hospital dentistry and to increase medical fees for consultations with elderly patients.

Investigating the Efficacy of Intraoral Wet Sheets.

OBJECTIVE: It is important that oral care is effective, efficient, and economical. Herein, we investigated the efficacy of intraoral wet sheets for oral care in comparison with sponge brushes. METHODS: We completed a Plaque Control Record (PCR) after observing intraoral plaque using a plaque disclosure test in healthy volunteers. After the teeth were cleaned for 3 minutes using a wet sheet, the test was repeated and the PCR was completed. The same method was performed using a sponge brush on the same subject under the same conditions 1 week later. The t test was used to analyze PCR findings. RESULTS: Ten healthy subjects were enrolled (mean age, 28.6 years). The PCR values improved from 44.0% before to 30.9% after use of the wet sheet. The post-cleaning PCR was significantly lower. The PCR values improved from 55.0% before to 50.2% after use of the sponge brush. CONCLUSIONS: The PCR improvement was greater when using the wet sheet. In all cases, the wet sheet was highly effective at smoothing tooth surfaces. Intraoral wet sheets may be an option for oral care performed by nurses and caregivers. Compared to the sponge brush, the intraoral wet sheet can save time and reduce costs.

Diagnosis and evaluation of 100 dysphagia patients using videoendoscopy at a core hospital of a local city in Japan.

Japan has entered an era of a super-aging population, and given the importance of oral nutrition, the need to evaluate swallowing function has increased. Herein, we contribute to continued developments in evaluating eating and swallowing functions by describing current videoendoscopy (VE) usage and trends to evaluate and diagnose causes of dysphagia. In all, 100 patients (58 men and 42 women; mean age: 79 years) with suspected dysphagia were enrolled; 15 of these were re-examinations. Examinations were conducted according to the Japanese Society of Dysphagia Rehabilitation VE examination guidelines for swallowing. In this study, several patients (77.8 %) with poor vocalization and a saliva reservoir were unable to eat. While evaluating the relationship between aspiration and pharyngeal or laryngeal influx, we found that when pharyngeal and laryngeal influx were present, the risk of aspiration was high. Some patients (38.9 %) were able to eat despite lacking a cough reflex; thus, the absence of a cough reflex does not necessarily equate to an inability to eat, even in patients unable to ingest nutrition orally. One case could ingest nutrition, even with no cough reflex. The 6-month survival rate after the examination of patients on nil per os status was 57.1 %, specifically in patients unable to ingest nutrition orally. These results suggest that decreased eating and swallowing functions indicate a poor prognosis for the patient's quality of life, as eating and swallowing require smooth passage in the oral phase. Therefore, actively requesting a dental intervention and oral rehabilitation is important for a patient presenting these issues.

Optimal conditions of collagenase treatment for isolation of articular chondrocytes from aged human tissues.

INTRODUCTION: There are various types of cartilage, including the auricular and articular cartilages. These cartilages have different functions, and their matrix volume and density of chondrocytes may differ. Thus, different protocols may be required to digest different types of cartilage. METHODS: In this study, we examined protocols for the digestion of articular and auricular cartilages and determined the optimal conditions for articular cartilage digestion. RESULTS: Our histological findings showed that the articular cartilage has a larger matrix area and fewer cells than the auricular cartilage. In 1-mm2 areas of articular and auricular cartilages, the average numbers of cells were 44 and 380, respectively, and the average matrix areas were 0.94 and 0.77 mm2, respectively. The maximum numbers of viable cells (approximately 1 × 105 cells/0.1 g of tissue) were obtained after digestion in 0.15, 0.3, or 0.6% collagenase for 24 h, in 1.2% collagenase for 6 h, or in 2.4% collagenase for 4 h. In tissues incubated in 0.15 or 0.3% collagenase, the cell numbers were lower than 1 × 105, even at 24 h, possibly reflecting incomplete digestion of cartilage. No significant differences were observed in the results of apoptosis assays for all collagenase exposure times and concentrations. However, cell damage appeared to be greater when collagenase concentrations were high. When cells obtained after digestion with different concentrations of collagenase were seeded at a density of 3000 cells/cm2, they yielded the maximum cell numbers after 1 week. CONCLUSIONS: We recommend a 24-h incubation in 0.6% collagenase as the optimal condition for chondrocyte isolation from articular cartilage. Moreover, we found that the optimum cell-seeding density is approximately 3000 cells/cm2. Conditions determined in this study would maximize the yield of isolated articular chondrocytes and enable the generation of a large quantity of cultured cells.

Three-dimensional changes of noses after transplantation of implant-type tissue-engineered cartilage for secondary correction of cleft lip-nose patients.

INTRODUCTION: We have developed an implant-type tissue-engineered cartilage using a poly-l-lactide scaffold. In a clinical study, it was inserted into subcutaneous areas of nasal dorsum in three patients, to correct cleft lip-nose deformity. The aim of this study was to helping evaluation on the efficacy of the regenerative cartilage. METHODS: 3D data of nasal shapes were compared between before and after surgery in computed tomography (CT) images. Morphological and qualitative changes of transplants in the body were also evaluated on MRI, for one year. RESULTS: The 3D data from CT images showed effective augmentation (>2 mm) of nasal dorsum in almost whole length, observed on the medial line of faces. It was maintained by 1 year post-surgery in all patients, while affected curves of nasal dorsum was not detected throughout the observation period. In magnetic resonance imaging (MRI), the images of transplanted cartilage had been observed until 1 year post-surgery. Those images were seemingly not straight when viewed from the longitudinal plain, and may have shown gentle adaptation to the surrounding nasal bones and alar cartilage tissues. CONCLUSION: Those findings suggested the potential efficacy of this cartilage on improvement of cleft lip-nose deformity. A clinical trial is now being performed for industrialization.

Computer-assisted preoperative simulation for positioning and fixation of plate in 2-stage procedure combining maxillary advancement by distraction technique and mandibular setback surgery.

INTRODUCTION: Computer-assisted preoperative simulation surgery is employed to plan and interact with the 3D images during the orthognathic procedure. It is useful for positioning and fixation of maxilla by a plate. We report a case of maxillary retrusion by a bilateral cleft lip and palate, in which a 2-stage orthognathic procedure (maxillary advancement by distraction technique and mandibular setback surgery) was performed following a computer-assisted preoperative simulation planning to achieve the positioning and fixation of the plate. A high accuracy was achieved in the present case. PRESENTATION OF CASE: A 21-year-old male patient presented to our department with a complaint of maxillary retrusion following bilateral cleft lip and palate. Computer-assisted preoperative simulation with 2-stage orthognathic procedure using distraction technique and mandibular setback surgery was planned. DISCUSSION: The preoperative planning of the procedure resulted in good aesthetic outcomes. The error of the maxillary position was less than 1mm. CONCLUSION: The implementation of the computer-assisted preoperative simulation for the positioning and fixation of plate in 2-stage orthognathic procedure using distraction technique and mandibular setback surgery yielded good results.

Computer-assisted preoperative simulation for positioning of plate fixation in Lefort I osteotomy: A case report.

Computed tomography images are used for three-dimensional planning in orthognathic surgery. This facilitates the actual surgery by simulating the surgical scenario. We performed a computer-assisted virtual orthognathic surgical procedure using optically scanned three-dimensional (3D) data and real computed tomography data on a personal computer. It helped maxillary bone movement and positioning and the titanium plate temporary fixation and positioning. This simulated the surgical procedure, which made the procedure easy, and we could perform precise actual surgery and could forecast the postsurgery outcome. This simulation method promises great potential in orthognathic surgery to help surgeons plan and perform operative procedures more precisely.

Application of floating cells for improved harvest in human chondrocyte culture.

Cell culture medium, which must be discarded during medium change, may contain many cells that do not attach to culture plates. In the present study, we focused on these floating cells and attempted to determine their usefulness for cartilage regeneration. We counted the number of floating cells discarded during medium change and compared the proliferation and differentiation between floating cells and their adherent counterparts. Chondrocyte monolayer culture at a density of 5 × 103 cells/cm(2) produced viable floating cells at a rate of 2.7-3.2 × 10(3) cells/cm(2) per primary culture. When only the floating cells from one dish were harvested and replated in another dish, the number of cells was 2.8 × 10(4) cells/cm(2) (approximately half confluency) on culture day 7. The number of cells was half of that obtained by culturing only adherent cells (5 × 10(4) cells/cm(2)). The floating and adherent cells showed similar proliferation and differentiation properties. The recovery of floating cells from the culture medium could provide an approximately 1.5-fold increase in cell number over conventional monolayer culture. Thus, the collection of floating cells may be regarded as a simple, easy, and reliable method to increase the cell harvest for chondrocytes.