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Tumani Üstdal B, Evlice B, Soydan Çabuk D, Duyan Yüksel H, Güner Akgül İ, Alkaya B, Arçay G. Evaluation of the thickness of masticatory muscles in patients with chronic periodontitis by ultrasonography. Oral Radiol 2024; 40:402-408. [PMID: 38558244 DOI: 10.1007/s11282-024-00746-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 03/06/2024] [Indexed: 04/04/2024]
Abstract
OBJECTIVES Periodontitis is one of the most common chronic inflammatory diseases. It causes changes in the biting abilities of individuals. However, periodontal treatment has positive effects on masticatory function. The aim of this study is to determine the effect of periodontitis and periodontal treatment on masticatory abilities by measuring masseter and temporal muscle thicknesses with ultrasonography before and after periodontal treatment in chronic periodontitis patients. METHODS The patients included in the study were determined by clinical and radiological examination. The thickness of the masseter and temporal muscles of the patients were measured by ultrasonography. Periodontal measurements and treatments of the patients were completed by a single physician. IBM SPSS 20.0 (IBM Corp., Armonk, NY) statistical program was used for statistical analysis. RESULTS A statistically significant difference was found between the values of periodontal measurements before and after treatment (p<0.05). In the ultrasonography measurements of the thickness of masseter and anterior temporal muscles, a statistically significant increase was observed in both rest and contraction values at all time intervals (p<0.05). Muscle thicknesses of male patients were higher than female patients. CONCLUSIONS Periodontitis negatively affects the masticatory performance of individuals. Chronic periodontitis patients should be referred for periodontal treatment without wasting time.
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Affiliation(s)
- Berkhas Tumani Üstdal
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Çukurova University, Adana, Turkey.
| | - Burcu Evlice
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Çukurova University, Adana, Turkey
| | - Damla Soydan Çabuk
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Çukurova University, Adana, Turkey
| | - Hazal Duyan Yüksel
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Çukurova University, Adana, Turkey
| | - İmran Güner Akgül
- Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Çukurova University, Adana, Turkey
| | - Bahar Alkaya
- Department of Periodontology, Faculty of Dentistry, Çukurova University, Adana, Turkey
| | - Gökçe Arçay
- Department of Periodontology, Faculty of Dentistry, Çukurova University, Adana, Turkey
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Kilinc HE, Onan D, Ulger O. Investigation of masticatory muscle thickness and mechanosensitivity of cervical and masticatory muscles in myofascial temporomandibular disorder patients with bruxism: A cross-sectional study. Musculoskelet Sci Pract 2024; 70:102919. [PMID: 38335810 DOI: 10.1016/j.msksp.2024.102919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 01/15/2024] [Accepted: 02/02/2024] [Indexed: 02/12/2024]
Abstract
OBJECTIVE Bruxism is a common problem associated with temporomandibular disorders (TMD). The aim of this study was to compare a patient group with Myofascial TMD and bruxism and a healthy control group in terms of masseter and temporal muscle thickness (clenching and resting), mechanosensitivity of neck and jaw muscles, craniofacial pain, and disability and emotional stress status. METHODS The study included 31 patients with myofascial TMD and bruxism (19 females, 12 males) with a mean age of 29.96 ± 8.12 years (range, 18-45 years), and a control group of 31 healthy subjects (19 females, 12 males) with a mean age of 27.58 ± 9.39 years years (range, 18-45 years). Masseter and temporal muscle thicknesses were evaluated with a mobile ultrasound device both at rest and when clenching the jaw. The mechanosensitivity values between the upper trapezius, obliquus capitis inferior, masseter and temporal muscles were measured with a digital algometer device. Craniofacial pain and disability level were evaluated with the Craniofacial Pain and Disability Index (CFPDI), and emotional stress levels with the Perceived Stress Scale-14 (PSS-14). RESULTS No difference was determined between the two groups in respect of the clenching and resting ratios of muscle thickness in any muscle (p > 0.05). The mechanosensitivity values in all muscles were lower in the myofascial TMD group than in the healthy group (p < 0.05). The CFPDI and PSS-14 scores were higher in the myofascial TMD group (p < 0.05). There was a moderate positive correlation between CFPDI, PSS-14 and Bruxism Frequency Score (p < 0.05). CONCLUSION The difference in mechanosensitivity and CFPDI values between the myofascial TMD patients with bruxism and the healthy control group indicates that the problem in this patient group has effects in the craniocervical and cervical regions. In addition, the correlation between CFPDI, PSS-14 and Bruxism Frequency Score in myofascial TMD patients suggests that this problem may be affected by the interaction of different parameters.
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Affiliation(s)
- Hasan Erkan Kilinc
- Spine Health Unit, Faculty of Physical Therapy and Rehabilitation, Hacettepe University, Ankara, Turkey.
| | - Dilara Onan
- Spine Health Unit, Faculty of Physical Therapy and Rehabilitation, Hacettepe University, Ankara, Turkey
| | - Ozlem Ulger
- Spine Health Unit, Faculty of Physical Therapy and Rehabilitation, Hacettepe University, Ankara, Turkey
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Sakamoto K, Hiraoka SI, Kawamura K, Ruan P, Uchida S, Akiyama R, Lee C, Ide K, Tanaka S. Automated evaluation of masseter muscle volume: deep learning prognostic approach in oral cancer. BMC Cancer 2024; 24:128. [PMID: 38267924 PMCID: PMC10809430 DOI: 10.1186/s12885-024-11873-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 01/12/2024] [Indexed: 01/26/2024] Open
Abstract
BACKGROUND Sarcopenia has been identified as a potential negative prognostic factor in cancer patients. In this study, our objective was to investigate the relationship between the assessment method for sarcopenia using the masseter muscle volume measured on computed tomography (CT) images and the life expectancy of patients with oral cancer. We also developed a learning model using deep learning to automatically extract the masseter muscle volume and investigated its association with the life expectancy of oral cancer patients. METHODS To develop the learning model for masseter muscle volume, we used manually extracted data from CT images of 277 patients. We established the association between manually extracted masseter muscle volume and the life expectancy of oral cancer patients. Additionally, we compared the correlation between the groups of manual and automatic extraction in the masseter muscle volume learning model. RESULTS Our findings revealed a significant association between manually extracted masseter muscle volume on CT images and the life expectancy of patients with oral cancer. Notably, the manual and automatic extraction groups in the masseter muscle volume learning model showed a high correlation. Furthermore, the masseter muscle volume automatically extracted using the developed learning model exhibited a strong association with life expectancy. CONCLUSIONS The sarcopenia assessment method is useful for predicting the life expectancy of patients with oral cancer. In the future, it is crucial to validate and analyze various factors within the oral surgery field, extending beyond cancer patients.
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Affiliation(s)
- Katsuya Sakamoto
- Department of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Osaka University, 1-8 Yamada-Oka, 565-0871, Suita, Osaka, Japan
| | - Shin-Ichiro Hiraoka
- Department of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Osaka University, 1-8 Yamada-Oka, 565-0871, Suita, Osaka, Japan.
| | - Kohei Kawamura
- Department of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Osaka University, 1-8 Yamada-Oka, 565-0871, Suita, Osaka, Japan
| | - Peiying Ruan
- NVIDIA AI Technology Center, NVIDIA Japan, 12F ATT New Tower, 2-11-7, Akasaka, Minato-ku, 107-0052, Tokyo, Japan
| | - Shuji Uchida
- Department of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Osaka University, 1-8 Yamada-Oka, 565-0871, Suita, Osaka, Japan
| | - Ryo Akiyama
- Department of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Osaka University, 1-8 Yamada-Oka, 565-0871, Suita, Osaka, Japan
| | - Chonho Lee
- Cybermedia Center, Osaka University, 5-1 Mihogaoka, 567-0047, Ibaraki city, Osaka, Japan
| | - Kazuki Ide
- Division of Scientific Information and Public Policy, Center for Infectious Disease Education and Research, Research Center on Ethical, Legal and Social Issues, Osaka University, Osaka University, Techno-Alliance Building C 208, 2-8 Yamadaoka, 565-0871, Suita, Osaka, Japan
| | - Susumu Tanaka
- Department of Oral and Maxillofacial Surgery, Graduate School of Dentistry, Osaka University, 1-8 Yamada-Oka, 565-0871, Suita, Osaka, Japan
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Dias A, Redinha L, Tavares F, Silva L, Malaquias F, Pezarat-Correia P. The effect of a controlled mandible position mouthguard on upper body strength and power in trained rugby athletes - A randomized within subject study. Injury 2022; 53:457-462. [PMID: 34785082 DOI: 10.1016/j.injury.2021.11.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 10/17/2021] [Accepted: 11/02/2021] [Indexed: 02/02/2023]
Abstract
BACKGROUND It is widely accepted that mouthguards are effective for injury protection in sports. However, findings on the effects of mouthguards in strength and power production remains controversial. Therefore, the aim of this study was to determine whether controlled-mandible position mouthguards influence strength and power production in well trained athletes. METHODS Twenty-two male amateur rugby players (25 ± 3.84 yrs; 1.92 ± 0.07 m; 93.91 ± 11.99 kg) volunteered for this study. Every participant performed an 1RM bench press test (113.20 ± 16.83 kg) to determine his maximal strength. In a randomized order, a ballistic bench press using 40% of the obtained 1RM (44.93 ± 6.76 Kg) was performed in a guided bar attached to a linear position transducer (LPT) for the following conditions: a) no mouthguard (CON); b) controlled mouthguard (MCM - jaw in centric relation); c) non-controlled mouthguard (NCM) and d) occlusal splint (OS). Vertical dimension of occlusion was also assessed for each of the testing conditions. RESULTS Athletes using a controlled mouthguard demonstrate a significant (p < 0.05) higher peak acceleration and peak force than those using no mouthguard. Additionally, when analysing the results of vertical dimension of occlusion, a significant difference (p < 0.05) was observed between controlled mouthguard and the other tested conditions. CONCLUSION Controlled mouthguards enhance peak force and peak acceleration in the ballistic bench press exercise without negatively affecting any other measure assessed in this study. We speculate that this is possibly due to an increased stability of temporomandibular joint.
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Affiliation(s)
- Amândio Dias
- Neuromuscular Research Lab, CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Lisboa, Portugal; Department of Science and Technology, Polytechnic Institute of Setúbal, School of Higher Education, Setúbal, Portugal; Kinesiolab - Laboratory of Human Movement Analysis, Instituto Piaget, Almada, Portugal.
| | - Luís Redinha
- Faculdade de Medicina Dentária, Universidade de Lisboa, Lisboa, Portugal
| | - Francisco Tavares
- Medical and Performance Department, Sporting clube de Portugal, Portugal
| | - Luís Silva
- Department of Biomechanics, University of Nebraska at Omaha, Omaha, NE, United States; NOVA School of Science and Technology, Largo da Torre, 2825-149 Caparica, Portugal
| | - Frederico Malaquias
- Neuromuscular Research Lab, CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Lisboa, Portugal
| | - Pedro Pezarat-Correia
- Neuromuscular Research Lab, CIPER, Faculdade de Motricidade Humana, Universidade de Lisboa, Lisboa, Portugal
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González-Fernández M, Perez-Nogueras J, Serrano-Oliver A, Torres-Anoro E, Sanz-Arque A, Arbones-Mainar JM, Sanz-Paris A. Masseter Muscle Thickness Measured by Ultrasound as a Possible Link with Sarcopenia, Malnutrition and Dependence in Nursing Homes. Diagnostics (Basel) 2021; 11:1587. [PMID: 34573928 PMCID: PMC8469670 DOI: 10.3390/diagnostics11091587] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/06/2021] [Accepted: 08/30/2021] [Indexed: 01/13/2023] Open
Abstract
Sarcopenia is a progressive and generalized loss of skeletal muscle mass and strength. It is frequently associated with malnutrition and dependence in nursing homes. Masticatory muscle strength could be the link between sarcopenia, malnutrition and dependence. We aimed to study the relation between sarcopenia, malnutrition and dependence with masseter muscle thickness measured by ultrasound. A cross-sectional study was realized, with 464 patients from 3 public nursing homes in Zaragoza (Spain). The diagnosis of sarcopenia was assessed according to the European Working Group on Sarcopenia in Older People 2 criteria, malnutrition by the Mini Nutritional Assessment (MNA) and the Global Leadership Initiative on Malnutrition (GLIM) criteria and functional capacity by the Barhel Index and the texture diet. Masseter muscle thickness (MMT) was measured by ultrasound. The median age was 84.7 years, and 70% of the participants were women. Sarcopenia was confirmed in 39.2% of patients, malnutrition in 26.5% (risk 47.8%), total dependence in 37.9% and diet texture was modified in 44.6%. By logistic regression, once the model was adjusted for age, sex, Barthel index and texture diet, our analyses indicated that each 1 mm decrease in MMT increased the risk of sarcopenia by ~57% (OR: 0.43), the risk of malnutrition by MNA by ~63% (OR: 0.37) and the risk of malnutrition by GLIM by ~34% (OR: 0.66). We found that MMT was reduced in sarcopenic, malnourished and dependent patients, and it could be the common point of a vicious cycle between sarcopenia and malnutrition. Further studies are needed to establish causality.
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Affiliation(s)
| | | | | | | | | | - Jose M. Arbones-Mainar
- Instituto de Investigación Sanitaria Aragon (IIS-Aragon), 50007 Zaragoza, Spain;
- Adipocyte and Fat Biology Laboratory (AdipoFat), Translational Research Unit, Instituto Aragones de Ciencias de la Salud (IACS), University Hospital Miguel Servet, 50007 Zaragoza, Spain
- Centro de Investigación Biomédica en Red Fisiopatología Obesidad y Nutrición (CIBERObn), Instituto Salud Carlos III, 28029 Madrid, Spain
| | - Alejandro Sanz-Paris
- Nutrition Department, University Hospital Miguel Servet, 50007 Zaragoza, Spain;
- Instituto de Investigación Sanitaria Aragon (IIS-Aragon), 50007 Zaragoza, Spain;
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Age Related Changes of Superior Orbicularis Oris Muscle in Terms of Tone and Viscoelastic Properties. J Craniofac Surg 2021; 33:236-239. [PMID: 34261972 DOI: 10.1097/scs.0000000000007992] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
OBJECTIVE To examine the age-related changes in the viscoelastic properties and tone of the superior orbicularis oris muscle by a portablehand-held myotonometer. METHODS A total of 128 individuals (65 female, 63 male) who met the inclusion criteria were evaluated. Individuals were divided into 2 groups as under 40 years old (Group 1), and above (Group 2). The viscoelastic properties and muscle tone of orbicularis oris muscle were evaluated bilaterally in supine position with the Myoton PRO (Myoton AS, Estonia) device from the skin overlying the orbicularis oris. The reference point is accepted as the right and left paramedial philtrum dimple. The statistical analysis was performed. RESULTS There was no statistically significant difference in the elasticity values of the right and left orbicularis oris muscles of the Group 1 and Group 2 individuals. There was a difference between the groups when the tone and stiffness values of both groups were compared. It was determined that individuals over the age of 40 had higher muscle tone and stiffness. All mechanical properties of the superior orbicularis oris muscle between the male and female individuals in Group 1 were different. The values are higher in the female gender. The elasticity values in both genders in Group 2 were similar. Tone and stiffness parameters were different between genders. CONCLUSIONS Myoton PRO can be recommended as an alternative device in the quantitative evaluations of post-operative follow-ups, and pre/post rehabilitation in terms of viscoelastic parameters of the muscle.
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Comparison of Ultrasonic Thickness of Masseter Muscle Between Individuals With and Without Severe Forward Head Posture: A Cross-Sectional Study. J Manipulative Physiol Ther 2020; 43:627-634. [PMID: 32839021 DOI: 10.1016/j.jmpt.2019.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 10/26/2019] [Accepted: 12/06/2019] [Indexed: 11/22/2022]
Abstract
OBJECTIVE In this cross-sectional descriptive-analytical study, we sought to compare the ultrasonic thickness of the masseter muscle in people with severe forward head posture vs people without forward head posture, and to determine sex differences in muscle thickness. METHODS Thirty-eight volunteers (19 with normal head postures and 19 with severe forward head postures), aged 18 to 35 years, entered the study. The severity of the forward head posture was measured by a plumb line and the craniovertebral angle drawn on the recorded images. Based on the recorded images, the masseter muscle thickness was also measured by a 7.5-MHz linear transducer using an ultrasound device in the seated position with 3 mouth positions (closed, half open, and fully open). RESULTS The results showed that the head posture affects masseter thickness significantly (P = .01), with masseter thickness significantly lower in the participants without severe forward head postures compared to those with severe forward head postures in the closed, half-open, and fully open mouth positions (P < .05). Comparing the mean masseter thickness across sexes showed that the masseter muscle is significantly thicker in men compared to women (P = .01). CONCLUSION Head posture and thickness of the masseter muscle are linked, as the masseter muscle was thicker in all 3 positions in the participants with severe forward head postures.
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Lindström I, Protto S, Khan N, Hernesniemi J, Sillanpää N, Oksala N. Association of masseter area and radiodensity with three-month survival after proximal anterior circulation occlusion. J Neurointerv Surg 2020; 13:25-29. [PMID: 32303585 DOI: 10.1136/neurintsurg-2020-015837] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 03/19/2020] [Accepted: 03/24/2020] [Indexed: 12/19/2022]
Abstract
BACKGROUND Masseter area (MA), a surrogate for sarcopenia, appears to be useful when estimating postoperative survival, but there is lack of consensus regarding the potential predictive value of sarcopenia in acute ischemic stroke (AIS) patients. We hypothesized that MA and density (MD) evaluated from pre-interventional CT angiography scans predict postinterventional survival in patients undergoing mechanical thrombectomy (MT). MATERIALS AND METHODS 312 patients treated with MT for acute occlusions of the internal carotid artery (ICA) or the M1 segment of the middle cerebral artery (M1-MCA) between 2013 and 2018. Median follow-up was 27.4 months (range 0-70.4). Binary logistic (alive at 3 months, OR <1) and Cox regression analyses were used to study the effect of MA and MD averages (MAavg and MDavg) on survival. RESULTS In Kaplan-Meier analysis, there was a significant inverse relationship with both MDavg and MAavg and mortality (MDavg P<0.001, MAavg P=0.002). Long-term mortality was 19.6% (n=61) and 3-month mortality 12.2% (n=38). In multivariable logistic regression analysis at 3 months, per 1-SD increase MDavg (OR 0.61, 95% CI 0.41 to 0.92, P=0.018:) and MAavg (OR 0.57, 95% CI 0.35 to 0.91, P=0.019) were the independent predictors associated with lower mortality. In Cox regression analysis, MDavg and MAavg were not associated with long-term survival. CONCLUSIONS In acute ischemic stroke patients, MDavg and MAavg are independent predictors of 3-month survival after MT of the ICA or M1-MCA. A 1-SD increase in MDavg and MAavg was associated with a 39%-43% decrease in the probability of death during the first 3 months after MT.
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Affiliation(s)
- Iisa Lindström
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Sara Protto
- Centre for Vascular Surgery and Interventional Radiology, Tampere University Hospital, Tampere, Finland
| | - Niina Khan
- Centre for Vascular Surgery and Interventional Radiology, Tampere University Hospital, Tampere, Finland
| | - Jussi Hernesniemi
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland.,Department of Cardiology, Tampere University Hospital, Heart Hospital, Tampere, Finland.,Finnish Cardiovascular Research Center, Tampere University Hospital, Tampere, Finland
| | - Niko Sillanpää
- Centre for Vascular Surgery and Interventional Radiology, Tampere University Hospital, Tampere, Finland
| | - Niku Oksala
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland.,Centre for Vascular Surgery and Interventional Radiology, Tampere University Hospital, Tampere, Finland.,Finnish Cardiovascular Research Center, Tampere University Hospital, Tampere, Finland
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Ohi T, Komiyama T, Miyoshi Y, Murakami T, Tsuboi A, Tomata Y, Tsuji I, Watanabe M, Hattori Y. The association between bilateral maximum occlusal force and all-cause mortality among community-dwelling older adults: The Tsurugaya project. J Prosthodont Res 2019; 64:289-295. [PMID: 31494054 DOI: 10.1016/j.jpor.2019.08.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 07/24/2019] [Accepted: 08/23/2019] [Indexed: 11/28/2022]
Abstract
PURPOSE This study aimed to investigate the relationship between the bilateral maximum occlusal force (MOF) of full dental arches and all-cause mortality in a group of community-dwelling older males and females in Japan. METHODS This 13-year prospective cohort study was conducted among 815 older adults (395 male and 420 female) aged 70 years or over (mean age ± standard deviation: 75.1 ± 4.5 years). Bilateral MOF in the intercuspal position was recorded with horseshoe-shaped pressure-sensitive film. Participants were grouped by gender into tertiles according to MOF. Demographic variables, chronicity, comorbidity, physical status, cognitive and psychological status, social functioning, and blood chemistry data were also assessed. Information regarding all-cause mortality and migration was obtained from the Sendai Municipal Authority. Cox proportional hazard modeling was performed to assess all-cause mortality during the follow-up period. RESULTS In total, 159 male and 109 female participants died over a median 12.9-year follow-up period, and the cumulative mortality significantly increased with lower MOF in both males and females. The multivariate Cox proportional hazard model demonstrated a significant increase in the risk of all-cause mortality associated with lower tertiles of MOF, relative to the upper tertile in males (hazard ratio: 1.62; 95% confidence interval: 1.05-2.51) and females (hazard ratio: 1.94; 95% confidence interval: 1.10-3.56). CONCLUSIONS There was a significant and independent association of bilateral MOF with all-cause mortality in community-dwelling elderly males and females in Japan. These findings suggested that maintenance of oral functioning contributes to general health.
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Affiliation(s)
- Takashi Ohi
- Division of Aging and Geriatric Dentistry, Department of Oral Function and Morphology, Tohoku University Graduate School of Dentistry, Sendai, Japan; Japanese Red Cross Ishinomaki Hospital, Ishinomaki, Japan.
| | - Takamasa Komiyama
- Division of Aging and Geriatric Dentistry, Department of Oral Function and Morphology, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Yoshitada Miyoshi
- Division of Aging and Geriatric Dentistry, Department of Oral Function and Morphology, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Takahisa Murakami
- Division of Public Health, Hygiene and Epidemiology, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Akito Tsuboi
- Department of Community Medical Supports, Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan
| | - Yasutake Tomata
- Division of Epidemiology, Department of Health Informatics and Public Health, Tohoku University School of Public Health, Graduate School of Medicine, Sendai, Japan
| | - Ichiro Tsuji
- Division of Epidemiology, Department of Health Informatics and Public Health, Tohoku University School of Public Health, Graduate School of Medicine, Sendai, Japan
| | - Makoto Watanabe
- Department of Social Welfare, Faculty of General Welfare, Tohoku Fukushi University, Sendai, Japan
| | - Yoshinori Hattori
- Division of Aging and Geriatric Dentistry, Department of Oral Function and Morphology, Tohoku University Graduate School of Dentistry, Sendai, Japan
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Meyers IA. Herodontics - is there a place for maintaining the apparently hopeless tooth? Aust Dent J 2019; 64 Suppl 1:S71-S79. [PMID: 31144327 DOI: 10.1111/adj.12698] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The population is ageing and people are keeping their own teeth for much longer due in part to the efforts of the dental profession in restoring teeth and reducing the number of teeth being extracted. Along with this there is now an increasing expectation by patients that they will retain their own teeth as they age and that dental practitioners will have the knowledge and skills to help them retain their own teeth. Contemporary restorative materials and techniques have increased the range of options available to assist with maintaining the dentition, and many of these procedures enable minimally invasive and cost effective management of the teeth as an alternative to complex and expensive procedures. This paper discusses the restoration of compromised and failing teeth in the ageing patient, and looks at the various issues facing the ageing dentate patient and the dilemma of when to restore or when to extract. Ultimately it is hoped that maintaining healthy teeth for life may not only improve oral function and quality of life, but may in fact reduce the impact of the physical and psychological aspects of ageing.
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Affiliation(s)
- I A Meyers
- The University of Queensland School of Dentistry, Brisbane, Qld, Australia
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Yamaguchi K, Tohara H, Hara K, Nakane A, Yoshimi K, Nakagawa K, Minakuchi S. Factors associated with masseter muscle quality assessed from ultrasonography in community-dwelling elderly individuals: A cross-sectional study. Arch Gerontol Geriatr 2019; 82:128-132. [DOI: 10.1016/j.archger.2019.02.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 07/04/2018] [Accepted: 02/10/2019] [Indexed: 12/23/2022]
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Pjetursson BE, Zarauz C, Strasding M, Sailer I, Zwahlen M, Zembic A. A systematic review of the influence of the implant-abutment connection on the clinical outcomes of ceramic and metal implant abutments supporting fixed implant reconstructions. Clin Oral Implants Res 2019; 29 Suppl 18:160-183. [PMID: 30306682 DOI: 10.1111/clr.13362] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/07/2018] [Indexed: 11/29/2022]
Abstract
OBJECTIVES The objective of this systematic review was to assess the influence of implant-abutment connection and abutment material on the outcome of implant-supported single crowns (SCs) and fixed dental prostheses (FDPs). METHODS An electronic Medline search complemented by manual searching was conducted to identify randomized controlled clinical trials, prospective and retrospective studies with a mean follow-up time of at least 3 years. Patients had to have been examined clinically at the follow-up visit. Failure and complication rates were analyzed using robust Poisson regression, and comparisons were made with multivariable Poisson regression models. RESULTS The search provided 1511 titles and 177 abstracts. Full-text analysis was performed for 147 articles resulting in 60 studies meeting the inclusion criteria. Meta-analysis of these studies indicated an estimated 5-year survival rate of 97.6% for SCs and 97.0% for FDPs supported by implants with internal implant-abutment connection and 95.7% for SCs and 95.8% for FDPs supported by implants with external connection. The 5-year abutment failure rate ranged from 0.7% to 2.8% for different connections with no differences between the types of connections. The total number of complications was similar between the two connections, yet, at external connections, abutment or occlusal screw loosening was more predominant. Ceramic abutments, both internally and externally connected, demonstrated a significantly higher incidence of abutment fractures compared with metal abutments. CONCLUSION For implant-supported SCs, both metal and ceramic abutments with internal and external connections exhibited high survival rates. Moreover, implant-supported FDPs with metal abutments with internal and external connections for also showed high survival rates.
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Affiliation(s)
- Bjarni Elvar Pjetursson
- Department of Reconstructive Dentistry, Faculty of Odontology, University of Iceland, Reykjavik, Iceland.,Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Cristina Zarauz
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Malin Strasding
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Irena Sailer
- Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine, University of Geneva, Geneva, Switzerland
| | - Marcel Zwahlen
- Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland
| | - Anja Zembic
- Clinic of Fixed and Removable Prosthodontics and Material Science, University of Zurich, Zurich, Switzerland
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13
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Hasegawa Y, Yoshida M, Sato A, Fujimoto Y, Minematsu T, Sugama J, Sanada H. Temporal muscle thickness as a new indicator of nutritional status in older individuals. Geriatr Gerontol Int 2019; 19:135-140. [PMID: 30689287 DOI: 10.1111/ggi.13570] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 09/21/2018] [Accepted: 10/12/2018] [Indexed: 01/04/2023]
Abstract
AIM Temporal muscle wasting is subjectively evaluated during nutritional assessment of protein-energy malnutrition. However, a quantitative evaluation method has not been established. The aim was to verify the validity and reliability of temporal muscle thickness measurement in comparison with established indicators of nutritional status, such as body mass index. METHODS A cross-sectional study was carried out from September 2016 through June 2017. A total of 73 individuals aged ≥65 years were recruited from two facilities and one community walking group. Temporal muscle thickness was measured using ultrasonography. Nutritional status was assessed with anthropometric measurements and laboratory examinations. RESULTS For validity, the temporal muscle thickness showed strong correlations with muscle mass, including calf circumference (r = 0.608, P < 0.001) and arm muscle circumference (r = 0.433, P < 0.001). In contrast, no strong correlations were observed with serum protein levels, such as albumin (r = 0.324, P = 0.005), or fat mass evaluated as triceps skinfold thickness (r = 0.216, P = 0.067). Temporal muscle thickness was significantly related to body mass index after adjusting for possible confounding factors of masticatory status, age and sex (β = 0.335, P = 0.007). As for reliability, the intrarater reliability of the temporal muscle measurement was 0.99 (95% confidence interval 0.98-1.00). Bland-Altman plot analysis showed no systematic errors, and the coefficient of variation of temporal muscle thickness measurements was 2.3%. CONCLUSIONS The present study suggests that measuring a temporal muscle thickness using ultrasonography is a valid and reliable method for evaluating nutritional status. Geriatr Gerontol Int 2019; 19: 135-140.
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Affiliation(s)
- Yoko Hasegawa
- Department of Gerontological Nursing/Wound Care Management, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.,Department of Clinical Nutrition Therapy, The University of Tokyo Hospital, Tokyo, Japan
| | - Mikako Yoshida
- Department of Imaging Nursing Science, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Aya Sato
- Department of Nursing Science, Faculty of Nursing and Social Welfare Science, Fukui Prefectural University, Fukui, Japan
| | - Yumiko Fujimoto
- Department of Gerontological Nursing, School of Health and Nursing Science, Wakayama Medical University, Wakayama, Japan
| | - Takeo Minematsu
- Department of Skincare Science, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.,Division of Care Innovation, Global Nursing Research Center, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Junko Sugama
- Institute for Frontier Science Initiative, Kanazawa University, Ishikawa, Japan
| | - Hiromi Sanada
- Department of Gerontological Nursing/Wound Care Management, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.,Division of Care Innovation, Global Nursing Research Center, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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14
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Isola G, Anastasi GP, Matarese G, Williams RC, Cutroneo G, Bracco P, Piancino MG. Functional and molecular outcomes of the human masticatory muscles. Oral Dis 2018; 24:1428-1441. [PMID: 29156093 DOI: 10.1111/odi.12806] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 10/30/2017] [Accepted: 11/14/2017] [Indexed: 02/05/2023]
Abstract
The masticatory muscles achieve a broad range of different activities such as chewing, sucking, swallowing, and speech. In order to accomplish these duties, masticatory muscles have a unique and heterogeneous structure and fiber composition, enabling them to produce their strength and contraction speed largely dependent on their motor units and myosin proteins that can change in response to genetic and environmental factors. Human masticatory muscles express unique myosin isoforms, including a combination of thick fibers, expressing myosin light chains (MyLC) and myosin class I and II heavy chains (MyHC) -IIA, -IIX, α-cardiac, embryonic and neonatal and thin fibers, respectively. In this review, we discuss the current knowledge regarding the importance of fiber-type diversity in masticatory muscles versus supra- and infrahyoid muscles, and versus limb and trunk muscles. We also highlight new information regarding the adaptive response and specific genetic variations of muscle fibers on the functional significance of the masticatory muscles, which influences craniofacial characteristics, malocclusions, or asymmetry. These findings may offer future possibilities for the prevention of craniofacial growth disturbances.
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Affiliation(s)
- G Isola
- Department of Biomedical, Odontostomatological Sciences and of Morphological and Functional Images, School of Dentistry, University of Messina, Messina, Italy
| | - G P Anastasi
- Department of Biomedical, Odontostomatological Sciences and of Morphological and Functional Images, School of Dentistry, University of Messina, Messina, Italy
| | - G Matarese
- Department of Biomedical, Odontostomatological Sciences and of Morphological and Functional Images, School of Dentistry, University of Messina, Messina, Italy
| | - R C Williams
- Department of Periodontology, UNC School of Dentistry, Chapel Hill, NC, USA
| | - G Cutroneo
- Department of Biomedical, Odontostomatological Sciences and of Morphological and Functional Images, School of Dentistry, University of Messina, Messina, Italy
| | - P Bracco
- Department of Orthodontics and Gnathology-Masticatory Function, University of Turin, Turin, Italy
| | - M G Piancino
- Department of Orthodontics and Gnathology-Masticatory Function, University of Turin, Turin, Italy
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15
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Shin HS. Handgrip strength and the number of teeth among Korean population. J Periodontol 2018; 90:90-97. [DOI: 10.1002/jper.18-0242] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 05/30/2018] [Accepted: 06/10/2018] [Indexed: 01/06/2023]
Affiliation(s)
- Hye-Sun Shin
- Department of Dental Hygiene; Eulji University College of Health Science; Seongnam Korea
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16
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S FC, C CL, A GM, JL AB. 2nd Rehabilitative Ultrasound Imaging Symposium in Physiotherapy – Madrid, Spain, 3–5 June 2016. Br J Sports Med 2018. [DOI: 10.1136/bjsports-2018-099763.1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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17
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Umeki K, Watanabe Y, Hirano H, Edahiro A, Ohara Y, Yoshida H, Obuchi S, Kawai H, Murakami M, Takagi D, Ihara K, Igarashi K, Ito M, Kawai Y. The relationship between masseter muscle thickness and appendicular skeletal muscle mass in Japanese community-dwelling elders: A cross-sectional study. Arch Gerontol Geriatr 2018; 78:18-22. [PMID: 29883805 DOI: 10.1016/j.archger.2018.05.014] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 05/07/2018] [Accepted: 05/28/2018] [Indexed: 12/12/2022]
Abstract
PURPOSE OF THE STUDY Sarcopenia has been identified as a health hazard in elderly people. Although the association between sarcopenia and a decrease in masticatory function has been reported, the mechanism underlying this association has not been widely reported. Therefore, in order to elucidate the relationship between sarcopenia and masticatory function, we examined whether the masseter muscle thickness (MMT), which is a factor influencing masticatory function, in community-dwelling elders is associated with the appendicular skeletal muscle index (SMI), a diagnostic criterion for sarcopenia. MATERIALS AND METHODS MMT was measured in 774 community-dwelling elders aged 65 years or older at resting state via ultrasonography, and SMI was measured with the bioelectrical impedance method. The relationships were investigated by calculating Pearson's correlation coefficients. Multiple regression analyses adjusted for age and sex, SMI, and oral-related items were performed to determine the association between these factors. RESULTS There was a significant correlation between the MMT and the SMI. The multiple regression analysis indicated that SMI was significantly associated with a decrease in MMT. CONCLUSIONS The reduction in whole-body skeletal muscle mass in sarcopenia may be involved in the reduction in MMT. Prevention of sarcopenia may be an important factor for maintaining masticatory function in the elderly.
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Affiliation(s)
- Kento Umeki
- Department of Removable Prosthodontics, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba, 271-8587, Japan
| | - Yutaka Watanabe
- Tokyo Metropolitan Institute of Gerontology, Itabashi, Tokyo, 173-0015, Japan; National Center for Geriatrics and Gerontology, Obu, Aichi, 474-8511, Japan.
| | - Hirohiko Hirano
- Department of Removable Prosthodontics, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba, 271-8587, Japan; Tokyo Metropolitan Institute of Gerontology, Itabashi, Tokyo, 173-0015, Japan
| | - Ayako Edahiro
- Tokyo Metropolitan Institute of Gerontology, Itabashi, Tokyo, 173-0015, Japan
| | - Yuki Ohara
- Department of Oral Health Care Education, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8510, Japan
| | - Hideyo Yoshida
- Tokyo Metropolitan Institute of Gerontology, Itabashi, Tokyo, 173-0015, Japan
| | - Shuichi Obuchi
- Tokyo Metropolitan Institute of Gerontology, Itabashi, Tokyo, 173-0015, Japan
| | - Hisashi Kawai
- Tokyo Metropolitan Institute of Gerontology, Itabashi, Tokyo, 173-0015, Japan
| | - Masaharu Murakami
- Tokyo Metropolitan Institute of Gerontology, Itabashi, Tokyo, 173-0015, Japan
| | - Daisuke Takagi
- Department of Critical Care Medicine and Dentistry, Division of Medically Compromised Geriatric Dentistry Graduate School of Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa, 238-8580, Japan
| | - Kazushige Ihara
- Department of Public Health, Toho University School of Medicine, Tokyo, 143-8540, Japan
| | - Kentaro Igarashi
- Nihon University Graduate School of Dentistry at Matsudo, Matsudo, Chiba, 271-8587, Japan
| | - Masayasu Ito
- Department of Removable Prosthodontics, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba, 271-8587, Japan
| | - Yasuhiko Kawai
- Department of Removable Prosthodontics, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba, 271-8587, Japan
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18
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Iwasaki M, Yoshihara A, Sato N, Sato M, Minagawa K, Shimada M, Nishimuta M, Ansai T, Yoshitake Y, Ono T, Miyazaki H. A 5-year longitudinal study of association of maximum bite force with development of frailty in community-dwelling older adults. J Oral Rehabil 2017; 45:17-24. [PMID: 28965370 DOI: 10.1111/joor.12578] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/26/2017] [Indexed: 11/30/2022]
Abstract
To determine whether maximum bite force (MBF), an objective measure of oral function, is associated with development of frailty in community-dwelling older adults. This prospective cohort study included community-dwelling Japanese adults aged 75 years at baseline (n = 322). Baseline MBF was measured using an electronic recording device (Occlusal Force-Meter GM10). Follow-up examinations, including physical fitness and anthropometric evaluation and structured questionnaires, were administered annually over a 5-year period to determine the incidence of frailty, which was defined by the presence of 3 or more of the following 5 components derived from the Cardiovascular Health Study: low level of mobility, low physical activity level, weakness, shrinking and poor endurance and energy. Adjusted hazard ratios (HRs) of incidence of frailty according to sex-stratified tertiles of baseline MBF were calculated using Cox proportional hazards regression models. During the follow-up, 49 participants (15.2%) developed frailty. Participants in the lower tertile of MBF exhibited a significantly greater risk of frailty than those in the upper tertile. After adjustment for sex, depression, diabetes and Eichner index, the adjusted HRs for frailty in the upper through lower tertiles of MBF were 1.00 (reference), 1.27 (95% confidence interval [CI]: 0.50-3.20) and 2.78 (95% CI: 1.15-6.72), respectively (P for trend = .01). Poor oral function, as indicated by low MBF, increases the risk of development of frailty among elderly men and women.
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Affiliation(s)
- M Iwasaki
- Division of Preventive Dentistry, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.,Division of Community Oral Health Development, Kyushu Dental University, Kitakyushu, Japan
| | - A Yoshihara
- Division of Oral Science for Health Promotion, Department of Oral Health and Welfare, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - N Sato
- Division of Comprehensive Prosthodontics, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - M Sato
- Division of Preventive Dentistry, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - K Minagawa
- Division of Preventive Dentistry, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - M Shimada
- Chiba Prefectural University of Health Sciences, Chiba, Japan
| | | | - T Ansai
- Division of Community Oral Health Development, Kyushu Dental University, Kitakyushu, Japan
| | - Y Yoshitake
- Institute of Fitness and Sports in Kanoya, Kanoya, Japan
| | - T Ono
- Division of Comprehensive Prosthodontics, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - H Miyazaki
- Division of Preventive Dentistry, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
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19
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Ogawa A, Ishizaki A, Asami T, Kwon H, Fujii K, Kasama K, Tanaka A, Hironaka S. Effectiveness of a mouth rinsing function test for evaluating the oral function of children. PEDIATRIC DENTAL JOURNAL 2017. [DOI: 10.1016/j.pdj.2017.03.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Reis Durão AP, Morosolli A, Brown J, Jacobs R. Masseter muscle measurement performed by ultrasound: a systematic review. Dentomaxillofac Radiol 2017; 46:20170052. [PMID: 28467130 DOI: 10.1259/dmfr.20170052] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
The aim of this study was to systematically review the existing scientific literature and evidence about (a) the validation of masseter muscle ultrasonography for accurate assessment of muscle thickness and (b) the reproducibility of masseter muscle thickness measures. An electronic literature search was conducted using determined keywords on specific databases. Preliminary search revealed 298 articles listed in Medline, Scopus and Web of Science. 60 duplicates were rejected, leaving 238 articles for review. After reading titles and abstracts, 31 articles remained. 23 articles were assessed for eligibility. These articles were categorized as follows: thickness, cross-section, volume and the length of the masseter muscle measured by ultrasonography. It is possible to verify the thickness of the masseter muscle in males and females in relaxation (10-15 and 9-13 mm, respectively) and contraction (14-19 and 12-15 mm, respectively). A similar tendency can also be evidenced in other measurements. Many studies evaluate masseter muscle dimensions to relate it to cephalometric analysis as such to evaluate morphological variations. It can be concluded that ultrasound is a reliable clinical tool for masseter muscle measurements, yet there is a need for standardization of methods and parameters to be recorded.
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Affiliation(s)
| | - Aline Morosolli
- 2 Department of Surgery, Dentistry School, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Jackie Brown
- 3 Consultant Dental and Maxillofacial Radiologist, Guy's and St Thomas NHS Foundation Trust & King's College London Dental Institute, London, UK
| | - Reinhilde Jacobs
- 4 Oral Imaging Center, OMFS-IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, Leuven, Belgium
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21
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Fujii K, Ishizaki A, Ogawa A, Asami T, Kwon H, Tanaka A, Sekiya N, Hironaka S. Validity of using multi-frequency bioelectrical impedance analysis to measure skeletal muscle mass in preschool children. J Phys Ther Sci 2017; 29:863-868. [PMID: 28603361 PMCID: PMC5462688 DOI: 10.1589/jpts.29.863] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 02/13/2017] [Indexed: 11/24/2022] Open
Abstract
[Purposes] Although it is recommended to develop a habit of physical activities, there is
no easy way to measure skeletal muscle mass in preschool children, which cause the
difficulty of evaluation. The purpose of this study was to examine the validity of body
composition including the skeletal muscle mass assessment using multi-frequency
bioelectrical impedance analysis by comparing body fat mass obtained by using
multi-frequency bioelectrical impedance analysis method and body mass index formulas.
[Subjects and Methods] Ninety-four children were surveyed for age, height, weight, grip
strength, maximum occlusal force, thickness of muscle and fat mass (masseter and lower
limb), body fat mass, skeletal muscle mass, and calf circumference. We assessed additional
parameters, which were thought to be related to skeletal muscle mass, to ensure validity.
[Results] A strong correlation was found in body fat mass values obtained using the
multi-frequency bioelectrical impedance analysis method and those obtained using the body
mass index formulas. Additionally, strong correlation coefficients were found between the
skeletal muscle mass/height obtained using the multi-frequency bioelectrical impedance
analysis method and grip strength and calf circumference. [Conclusion] Our results
indicate that skeletal muscle mass can be reliably measured using the multi-frequency
bioelectrical impedance analysis method in preschool children.
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Affiliation(s)
- Kanako Fujii
- Department of Special Needs Dentistry, Division of Hygiene and Oral Health, Showa University School of Dentistry, Japan
| | - Akiko Ishizaki
- Department of Special Needs Dentistry, Division of Hygiene and Oral Health, Showa University School of Dentistry, Japan
| | - Ayano Ogawa
- Department of Special Needs Dentistry, Division of Hygiene and Oral Health, Showa University School of Dentistry, Japan
| | - Takuya Asami
- Department of Special Needs Dentistry, Division of Hygiene and Oral Health, Showa University School of Dentistry, Japan
| | - Hyosong Kwon
- Department of Special Needs Dentistry, Division of Hygiene and Oral Health, Showa University School of Dentistry, Japan.,Tanaka Dental Clinic, Japan
| | - Akinobu Tanaka
- Department of Special Needs Dentistry, Division of Hygiene and Oral Health, Showa University School of Dentistry, Japan.,Tanaka Dental Clinic, Japan
| | - Noboru Sekiya
- Department of Physical Therapy, School of Nursing and Rehabilitation Sciences, Showa University, Japan
| | - Shouji Hironaka
- Department of Special Needs Dentistry, Division of Hygiene and Oral Health, Showa University School of Dentistry, Japan
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22
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Gaszynska E, Kopacz K, Fronczek-Wojciechowska M, Padula G, Szatko F. Electromyographic activity of masticatory muscles in elderly women - a pilot study. Clin Interv Aging 2017; 12:111-116. [PMID: 28138227 PMCID: PMC5238803 DOI: 10.2147/cia.s118338] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Objectives To evaluate the effect of age and chosen factors related to aging such as dentition, muscle strength, and nutrition on masticatory muscles electromyographic activity during chewing in healthy elderly women. Background With longer lifespan there is a need for maintaining optimal quality of life and health in older age. Skeletal muscle strength deteriorates in older age. This deterioration is also observed within masticatory muscles. Methods A total of 30 women, aged 68–92 years, were included in the study: 10 individuals had natural functional dentition, 10 were missing posterior teeth in the upper and lower jaw reconstructed with removable partial dentures, and 10 were edontoulous, using complete removable dentures. Surface electromyography was performed to evaluate masticatory muscles activity. Afterwards, measurement of masseter thickness with ultrasound imaging was performed, body mass index and body cell mass index were calculated, and isometric handgrip strength was measured. Results Isometric maximal voluntary contraction decreased in active masseters with increasing age and in active and passive temporalis muscles with increasing age and increasing body mass index. In active masseter, mean electromyographic activity during the sequence (time from the start of chewing till the end when the test food became ready to swallow) decreased with increasing age and during the cycle (single bite time) decreased with increasing age and increasing body mass index. In active and passive temporalis muscles, mean electromyographic activity during the sequence and the cycle decreased with increasing age, increasing body mass index, and loss of natural dentition. Individuals with natural dentition had significantly higher mean muscle activity during sequence and cycle in active temporalis muscles than those wearing full dentures and higher maximal activity during cycle in individuals with active and passive temporalis muscles than in complete denture wearers. Conclusion Decrease in electromyographic activity of masticatory muscles in elderly women is related to age, deterioration of dental status, and body mass index.
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Affiliation(s)
| | - Karolina Kopacz
- Academic Laboratory of Movement and Human Physical Performance "DynamoLab", Medical University of Lodz, Lodz, Poland
| | | | - Gianluca Padula
- Academic Laboratory of Movement and Human Physical Performance "DynamoLab", Medical University of Lodz, Lodz, Poland
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23
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24
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Iinuma T, Arai Y, Takayama M, Abe Y, Ito T, Kondo Y, Hirose N, Gionhaku N. Association between maximum occlusal force and 3-year all-cause mortality in community-dwelling elderly people. BMC Oral Health 2016; 16:82. [PMID: 27586200 PMCID: PMC5009498 DOI: 10.1186/s12903-016-0283-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 08/23/2016] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Among the very elderly, poor oral health reduces life expectancy. In this study, differences in the magnitude of the maximum occlusal force (MOF) in the very elderly were examined in terms of effects on all-cause mortality in a 3-year follow-up. METHODS We evaluated 489 community-living elderly individuals aged 85 years or older. MOF was measured using an occlusal force measuring device, and participants were classified into three groups according to gender- and dental status-sensitive tertiles. Demographic variables, cognitive, physical function, psychological status, oral health, comorbidity, and blood chemistry factors were assessed. One-way analyses of variance, χ (2) tests, and the Kruskal-Wallis test were used for statistical analyses. The relationship between MOF tertiles and 3-year all-cause mortality was examined using a multivariate Cox model analysis after adjusting for confounding factors. RESULTS MOF tertiles were significantly associated with cognitive impairment, number of teeth, limitations on chewable foods, handgrip strength, timed up-and-go test, and diabetes mellitus. During the follow-up period, 74 subjects died. Subjects with the highest MOF had a significantly lower mortality rate than other groups (log rank P = 0.031). In the univariate Cox model, MOF tertiles were independently associated with a lower risk of death (HR = 0.69, 95 % CI = 0.51-0.91). Even after adjusting for various confounders in the multivariate Cox model (Model 1), MOF was independently associated with a lower risk of death (HR = 0.67, 95 % CI = 0.50-0.91). In model 2, we added handgrip strength as a confounder and found that the HR for MOF was attenuated (HR = 0.73, 95 % CI = 0.54-0.99), but still statistically significant. CONCLUSIONS In a cohort of the very elderly, MOF was independently associated with all-cause mortality after adjusting for various health issues. Moreover, this independent association remained after a further adjustment for handgrip strength; however, the HR was attenuated. This suggests that MOF and handgrip strength may share a common mechanism of a general decrease in muscle strength, possibly sarcopenia, which is a significant cause of mortality in the very old.
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Affiliation(s)
- Toshimitsu Iinuma
- Department of Complete Denture Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan.
| | - Yasumichi Arai
- Center for Supercentenarian Medical Research, Keio University School of Medicine, Tokyo, Japan
| | - Michiyo Takayama
- Center for Preventive Medicine, Keio University School of Medicine, Tokyo, Japan
| | - Yukiko Abe
- Center for Supercentenarian Medical Research, Keio University School of Medicine, Tokyo, Japan
| | - Tomoka Ito
- Department of Complete Denture Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan
| | - Yugaku Kondo
- Department of Complete Denture Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan
| | - Nobuyoshi Hirose
- Center for Supercentenarian Medical Research, Keio University School of Medicine, Tokyo, Japan
| | - Nobuhito Gionhaku
- Department of Complete Denture Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan
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25
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Iwasaki M, Yoshihara A, Sato N, Sato M, Taylor GW, Ansai T, Ono T, Miyazaki H. Maximum bite force at age 70 years predicts all-cause mortality during the following 13 years in Japanese men. J Oral Rehabil 2016; 43:565-74. [PMID: 27084614 DOI: 10.1111/joor.12401] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/19/2016] [Indexed: 11/28/2022]
Abstract
There is limited information on the impact of oral function on mortality among older adults. The aim of this prospective cohort study was to examine whether an objective measure of oral function, maximum bite force (MBF), is associated with mortality in older adults during a 13-year follow-up period. Five hundred and fifty-nine community-dwelling Japanese (282 men and 277 women) aged 70 years at baseline were included in the study. Medical and dental examinations and a questionnaire survey were conducted at baseline. Maximum bite force was measured using an electronic recording device (Occlusal Force-Meter GM10). Follow-up investigation to ascertain vital status was conducted 13 years after baseline examinations. Survival rates among MBF tertiles were compared using Cox proportional hazards regression models stratified by sex. There were a total of 111 deaths (82 events for men and 29 for women). Univariable analysis revealed that male participants in the lower MBF tertile had increased risk of all-cause mortality [hazard ratio (HR) = 1·94, 95% confidence interval (CI) = 1·13-3·34] compared with those in the upper MBF tertile. This association remained significant after adjustment for confounders (adjusted HR = 1·84, 95% CI = 1·07-3·19). Conversely, no association between MBF and all-cause mortality was observed in female participants. Maximum bite force was independently associated with all-cause mortality in older Japanese male adults. These data provide additional evidence for the association between oral function and geriatric health.
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Affiliation(s)
- M Iwasaki
- Division of Preventive Dentistry, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan.,Division of Community Oral Health Development, Kyushu Dental University, Kitakyushu, Japan
| | - A Yoshihara
- Division of Oral Science for Health Promotion, Department of Oral Health and Welfare, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - N Sato
- Division of Comprehensive Prosthodontics, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - M Sato
- Division of Preventive Dentistry, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - G W Taylor
- Department of Preventive and Restorative Dental Sciences, University of California San Francisco, San Francisco, CA, USA
| | - T Ansai
- Division of Community Oral Health Development, Kyushu Dental University, Kitakyushu, Japan
| | - T Ono
- Division of Comprehensive Prosthodontics, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - H Miyazaki
- Division of Preventive Dentistry, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
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Oliveira JHPD, Dourado Filho MGD, Melo TMA, Lima NSD, Marcelino Filho M, Silva HJD. Evidências de medidas de normalidade para a espessura do músculo masseter avaliadas com ultrassonografia: estudo de revisão. REVISTA CEFAC 2015. [DOI: 10.1590/1982-021620150514] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
O objetivo foi estudar medidas de normalidade para espessura do músculo masseter, bem como os métodos de mensuração da espessura por ultrassonografia. Foi realizada uma revisão a partir das bases de dados MEDLINE, LILACS, JCR e PubMed. Foram utilizadas publicações até junho de 2013. Foram incluídos trabalhos que envolveram indivíduos adultos jovens considerados hígidos quanto ao sistema estomatognático - sem a presença de sinais e sintomas de distúrbios na articulação temporomandibular. Foram encontrados 166 artigos. Pela leitura do titulo foram excluídos os artigos repetidos, restando 108 estudos. Após a leitura do titulo e a exclusão de artigos que não estavam relacionados ao assunto, foram obtidos 54 trabalhos. A leitura dos resumos permitiu a obtenção de 22 estudos. Na análise das medidas foram utilizados os testes t para amostras pareadas e independentes, verificado os intervalos de confiança e confeccionados gráficos forest plot para estudar a heterogeneidade dos trabalhos. Constatou-se que o músculo masseter em homens demonstra ser mais espesso quando comparado ao das mulheres, tanto no repouso quanto em contração. A comparação do estado de repouso entre os gêneros não revelou diferença significante. O mesmo ocorreu em contração. Também verificou-se a associação de outros métodos com a ultrassonografia. A amostra probabilística obtida revelou valores para o estado de contração e repouso. Houve diferença nas medidas entre os gêneros. Foi constatada significante heterogeneidade nos dados dos estudos. A mensuração da espessura do músculo masseter com a ultrassonografia apresenta-se nos diversos estudos como um método objetivo, preciso e com reprodutibilidade.
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Volk GF, Sauer M, Pohlmann M, Guntinas-Lichius O. Reference values for dynamic facial muscle ultrasonography in adults. Muscle Nerve 2014; 50:348-57. [DOI: 10.1002/mus.24204] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2013] [Revised: 02/05/2014] [Accepted: 02/07/2014] [Indexed: 11/05/2022]
Affiliation(s)
- Gerd Fabian Volk
- Department of Otorhinolaryngology; Jena University Hospital; Lessingstrasse 2 D-07740 Jena Germany
- The Facial Nerve Center; Jena University Hospital; Jena Germany
| | - Maik Sauer
- Department of Otorhinolaryngology; Jena University Hospital; Lessingstrasse 2 D-07740 Jena Germany
| | - Martin Pohlmann
- Department of Otorhinolaryngology; Jena University Hospital; Lessingstrasse 2 D-07740 Jena Germany
| | - Orlando Guntinas-Lichius
- Department of Otorhinolaryngology; Jena University Hospital; Lessingstrasse 2 D-07740 Jena Germany
- The Facial Nerve Center; Jena University Hospital; Jena Germany
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Gaszynska E, Godala M, Szatko F, Gaszynski T. Masseter muscle tension, chewing ability, and selected parameters of physical fitness in elderly care home residents in Lodz, Poland. Clin Interv Aging 2014; 9:1197-203. [PMID: 25092969 PMCID: PMC4113568 DOI: 10.2147/cia.s66672] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Maintaining good physical fitness and oral function in old age is an important element of good quality of life. Disability-related impairment of oral function contributes to a deterioration of the diet of older people and to the reduction of their social activity. OBJECTIVES Investigate the association between masseter muscle tension, dental status, and physical fitness parameters. MATERIALS AND METHODS Two hundred fifty-nine elderly care home residents (97 men, 162 women; mean age, 75.3±8.9 years) were involved in this cross-sectional study. Their chewing ability was evaluated by masseter muscle tension palpation, differences of masseter muscle thickness, self-reported chewing ability, number of present and functional teeth, and number of posterior tooth pairs. Masseter muscle thickness was measured by ultrasonography. To assess physical fitness, hand grip strength and the timed up-and-go test were performed. Nutritional status was assessed using body mass index and body cell mass index (BCMI), calculated on the basis of electrical bioimpedance measurements. Medical records were used to collect information on systemic diseases and the number of prescribed medications. Subjects were also evaluated for their ability to perform ten activities of daily living. RESULTS Ninety-seven percent of the subjects suffered from systemic diseases. The three most prevalent illnesses were cardiac/circulatory 64.5%, musculoskeletal 37.3%, and endocrine/metabolic/nutritional 29.3%. Of the participants, 1.5% were underweight and more than one third (34.4%) were overweight. Malnutrition (BCMI below normal) was found in almost half (45.2%) of the subjects. Only 5.8% had a sufficient number of functional natural teeth. Statistically significant correlations were found between palpation of masseter muscle tension and perceived chewing ability, number of present teeth, number of functional teeth, number of posterior tooth pairs, timed up-and-go, hand grip strength, body mass index, BCMI, and activities of daily living. In a multivariate model, after adjusting for age, sex, and education, subjects with higher BCMI, higher hand grip strength, and more present teeth had a significantly higher chance of strong masseter muscle tension. CONCLUSION There is a relationship between chewing ability and physical fitness in elderly people. Efficiency of masseter muscles is related to physical fitness in the elderly. Masseter muscle tension examined by palpation can be used in public dentistry as one of the indicators of quality of life.
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Affiliation(s)
- Ewelina Gaszynska
- Department of Hygiene and Health Promotion, Medical University of Lodz, Poland
| | - Malgorzata Godala
- Department of Nutrition and Epidemiology, Medical University of Lodz, Poland
| | - Franciszek Szatko
- Department of Hygiene and Health Promotion, Medical University of Lodz, Poland
| | - Tomasz Gaszynski
- Department of Emergency Medicine and Disaster Medicine, Medical University of Lodz, Poland
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Carrier DR, Morgan MH. Protective buttressing of the hominin face. Biol Rev Camb Philos Soc 2014; 90:330-46. [PMID: 24909544 DOI: 10.1111/brv.12112] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2013] [Revised: 04/10/2014] [Accepted: 04/15/2014] [Indexed: 11/29/2022]
Abstract
When humans fight hand-to-hand the face is usually the primary target and the bones that suffer the highest rates of fracture are the parts of the skull that exhibit the greatest increase in robusticity during the evolution of basal hominins. These bones are also the most sexually dimorphic parts of the skull in both australopiths and humans. In this review, we suggest that many of the facial features that characterize early hominins evolved to protect the face from injury during fighting with fists. Specifically, the trend towards a more orthognathic face; the bunodont form and expansion of the postcanine teeth; the increased robusticity of the orbit; the increased robusticity of the masticatory system, including the mandibular corpus and condyle, zygoma, and anterior pillars of the maxilla; and the enlarged jaw adductor musculature are traits that may represent protective buttressing of the face. If the protective buttressing hypothesis is correct, the primary differences in the face of robust versus gracile australopiths may be more a function of differences in mating system than differences in diet as is generally assumed. In this scenario, the evolution of reduced facial robusticity in Homo is associated with the evolution of reduced strength of the upper body and, therefore, with reduced striking power. The protective buttressing hypothesis provides a functional explanation for the puzzling observation that although humans do not fight by biting our species exhibits pronounced sexual dimorphism in the strength and power of the jaw and neck musculature. The protective buttressing hypothesis is also consistent with observations that modern humans can accurately assess a male's strength and fighting ability from facial shape and voice quality.
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Affiliation(s)
- David R Carrier
- Department of Biology, University of Utah, 257 S 1400 E, Salt Lake City, UT, 84112, U.S.A
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Évaluation de la morphologie du muscle masséter dans différents types de malocclusions en utilisant la tomographie volumétrique à faisceau conique. Int Orthod 2014. [DOI: 10.1016/j.ortho.2013.12.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Becht MP, Mah J, Martin C, Razmus T, Gunel E, Ngan P. Evaluation of masseter muscle morphology in different types of malocclusions using cone beam computed tomography. Int Orthod 2014; 12:32-48. [PMID: 24456631 DOI: 10.1016/j.ortho.2013.12.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
OBJECTIVES To evaluate the length and orientation of masseter in different types of malocclusions using Cone Beam Computed Tomography (CBCT). METHODS Samples of 180 patients seeking orthodontic treatment at the University of Nevada, Las Vegas School of Dentistry, were included in the study. Pre-treatment multi-slice CBCT scans of these patients were divided into three anteroposterior groups: Class I subjects with ANB angle 0° to 5°; Class II subjects with ANB angle >5°; and Class III subjects with ANB angle <0°. CBCT scans were also divided into three vertical groups: normodivergent subjects with mandibular plane angle 22° to 30°; hyperdivergent subjects with mandibular plane angle >30°, hypodivergent subjects with mandibular plane angle <22°. The masseter was identified and landmarks were placed on the anterior border, at the origin and insertion of the muscle in 3-D mode of the Dolphin Imaging 10.5 Premium software. The Frankfort Horizontal Plane was used as a reference plane and an angular measurement was obtained by intersection of a line produced by the masseter landmarks to calculate the orientation of the muscles. The length of the masseter was measured and data were analyzed using ANOVA and matched pairs test. RESULTS ANOVA found significant differences in muscle length among the three vertical groups for both the left and right muscles. Paired t test showed significantly shorter muscle length for the hypodivergent group (43.3 ± 4.0 mm) compared to the normodivergent group (45.6 ± 4.5 mm, P < 0.05) and shorter muscle length for the hyperdivergent group (42.3 ± 4.7 mm) compared to the hypodivergent group, P < 0.05. No significant differences were found in muscle length among the three anteroposterior groups. However, significant differences in muscle orientation angle were found among the three anteroposterior groups (P < 0.05). Class II subjects were found to have the most acute orientation angle (67.2 ± 6.6°) and Class III had the most obtuse orientation angle (81.6 ± 6.8°). CONCLUSIONS These results suggest that certain types of malocclusion may have different masseter lengths and orientations and these differences may have implications for the mechanical advantage in bite force. For example, Class III individuals may have greater bite force than Class II individuals because the muscle fibers are oriented more along the arch of closure.
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Affiliation(s)
- Michael P Becht
- 107 Watterson Trail #103, Louisville, Kentucky KY 40243, USA
| | - James Mah
- Department of Orthodontics, University of Nevada, Las Vegas School of Dentistry, 1001 Shadow Lane MS 7410, Las Vegas, Nevada NV 89106, USA
| | - Chris Martin
- Department of Orthodontics, West Virginia University School of Dentistry, Health Science Center North, P.O. Box 9480, Morgantown, West Virginia WV 26506, USA
| | - Thomas Razmus
- Department of Diagnostic Services, West Virginia University School of Dentistry, Health Science Center North, P.O. Box 9480, Morgantown, West Virginia WV 26506, USA
| | - Erdogan Gunel
- Department of Statistics, West Virginia University School of Dentistry, Health Science Center North, P.O. Box 9480, Morgantown, West Virginia WV 26506, USA
| | - Peter Ngan
- Department of Orthodontics, West Virginia University School of Dentistry, Health Science Center North, P.O. Box 9480, Morgantown, West Virginia WV 26506, USA.
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Stokholm R, Isidor F, Nyengaard JR. Histologic and histomorphometric evaluation of peri-implant bone of immediate or delayed occlusal-loaded non-splinted implants in the posterior mandible--an experimental study in monkeys. Clin Oral Implants Res 2013; 25:1311-1318. [PMID: 24118392 DOI: 10.1111/clr.12274] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/27/2013] [Indexed: 11/30/2022]
Abstract
OBJECTIVES The primary aim of this study was to compare the bone reaction around immediate-loaded non-splinted single implants vs. delayed loaded non-splinted single implants placed in healed ridges in the posterior mandible. MATERIALS AND METHODS Six adult Macaca Fascicularis monkeys were used in this study. The first and second premolars and the first molar were extracted in both sides of the mandible. After 3 months of healing, four implants (Replace Select Tapered; Nobel Biocare, Gothenburg, Sweden) with a moderately rough surface (TiUnite, Nobel Biocare) were placed in the edentulous areas of each monkey, two in each side. The implants had a length of 10 mm and a diameter of 3.5 mm. Four groups of varying time and occlusal loading aspects were created: (i) control group: implant placed non-loaded for 3 months; (ii) immediate loaded: implant placed and loaded immediately for 3 months; (iii) immediate loaded: implant placed and loaded immediately for 6 months; and (iv) delayed loaded: implant placed submerged for 3 months and then loaded for 3 months. At the loaded implants, after a second stage surgery, a composite crown was made directly on an abutment mounted on the implant reinsuring simultaneous occlusal contact on the implant crown and the neighboring teeth. After euthanization of the animals, histologic specimens were quantified in the light microscope. RESULTS All implants were clinically, radiographically, and histologically osseointegrated at the time of euthanization and with only mild signs of inflammation in the peri-implant mucosa. The histologic marginal bone level was located on average 1.14-1.74 mm apical to the margin of the implants in the various groups. The average bone-to-implant contact (BIC) varied between 55% and 65% and the average bone density (i.e., the proportion of mineralized bone tissue from the implant surface and to a distance of 1 mm lateral to the implant) varied between 30.6% and 34.2%. No statistical significant differences between groups were observed in the above-stated histomorphometric parameters. CONCLUSIONS Similar histologic and histomorphometric findings were observed in immediately and delayed loaded non-splinted implants placed in the posterior mandible of macaque monkeys.
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Affiliation(s)
- Rie Stokholm
- Section of Prosthetic Dentistry, Department of Dentistry, Aarhus University, Aarhus, Denmark
| | - Flemming Isidor
- Section of Prosthetic Dentistry, Department of Dentistry, Aarhus University, Aarhus, Denmark
| | - Jens R Nyengaard
- Stereology and Electron Microscopy Laboratory, Centre for Stochastic Geometry and Advanced Bioimaging, Aarhus University, Aarhus, Denmark
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Toniollo MB, Macedo AP, Rodrigues RCS, Ribeiro RF, Mattos MDGCD. A three-dimensional finite element analysis of the stress distribution on morse taper implants surface. J Prosthodont Res 2013; 57:206-12. [DOI: 10.1016/j.jpor.2013.02.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Revised: 02/01/2013] [Accepted: 02/19/2013] [Indexed: 11/16/2022]
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Wänman A. Endurance to physical strain in patients with temporomandibular disorders: a case-control study. Acta Odontol Scand 2012; 70:455-62. [PMID: 22149885 DOI: 10.3109/00016357.2011.635599] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE The hypothesis tested was whether patients with temporomandibular disorders (TMD) have an impaired endurance to motor tasks, under physical strain. MATERIAL AND METHODS The study population included 81 cases with TMD and 75 controls. After giving their informed consent, the participants filled out a questionnaire and performed five endurance trials. Each trial was measured in seconds from start to termination. The tests included: (a) holding the arm in a straight out position with a 2 kg weight in the hand, (b) lifting and lowering the arm with a 2 kg weight in the hand, (c) opening and closing the mandible repeatedly against a resistance of 1.6 kg during the jaw-opening phase, (d) protruding and retracting the mandible repeatedly against a resistance of 1.6 kg during the protruding phase and (e) unilateral chewing of three pieces of chewing gum. Analysis of differences between cases and controls for endurance were evaluated with Mann-Whitney U-test. A p-value < 0.05 was considered statistically significant. RESULTS The cases had statistically significantly (p < 0.0001) lower endurance time than controls for all tests. CONCLUSIONS Patients with TMD compared to those without signs and symptoms of TMD have an impaired capacity to endure motor tasks that involve physical demand of the jaw muscles and shoulder girdle muscles.
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Affiliation(s)
- Anders Wänman
- Department of Odontology/Clinical Oral Physiology, Faculty of Medicine, Umeå University, Sweden.
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Truong Quang Dang K, Le Minh H, Nguyen Thanh H, Vo Van T. Analyzing surface EMG signals to determine relationship between jaw imbalance and arm strength loss. Biomed Eng Online 2012; 11:55. [PMID: 22913755 PMCID: PMC3494581 DOI: 10.1186/1475-925x-11-55] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Accepted: 08/16/2012] [Indexed: 12/02/2022] Open
Abstract
Background This study investigated the relationship between dental occlusion and arm strength; in particular, the imbalance in the jaw can cause loss in arm strength phenomenon. One of the goals of this study was to record the maximum forces that the subjects can resist against the pull-down force on their hands while biting a spacer of adjustable height on the right or left side of the jaw. Then EMG measurement was used to determine the EMG-Force relationship of the jaw, neck and arms muscles. This gave us useful insights on the arms strength loss due to the biomechanical effects of the imbalance in the jaw mechanism. Methods In this study to determine the effects of the imbalance in the jaw to the strength of the arms, we conducted experiments with a pool of 20 healthy subjects of both genders. The subjects were asked to resist a pull down force applied on the contralateral arm while biting on a firm spacer using one side of the jaw. Four different muscles – masseter muscles, deltoid muscles, bicep muscles and trapezoid muscles – were involved. Integrated EMG (iEMG) and Higuchi fractal dimension (HFD) were used to analyze the EMG signals. Results The results showed that (1) Imbalance in the jaw causes loss of arm strength contra-laterally; (2) The loss is approximately a linear function of the height of the spacers. Moreover, the iEMG showed the intensity of muscle activities decreased when the degrees of jaw imbalance increased (spacer thickness increased). In addition, the tendency of Higuchi fractal dimension decreased for all muscles. Conclusions This finding indicates that muscle fatigue and the decrease in muscle contraction level leads to the loss of arm strength.
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Affiliation(s)
- Khoa Truong Quang Dang
- Biomedical Engineering Department, International University of Vietnam National Universities in Ho Chi Minh City, Quarter 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam.
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Van Den Engel-Hoek L, Van Alfen N, De Swart BJM, De Groot IJM, Pillen S. Quantitative ultrasound of the tongue and submental muscles in children and young adults. Muscle Nerve 2012; 46:31-7. [PMID: 22644805 DOI: 10.1002/mus.23277] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/07/2011] [Indexed: 12/14/2022]
Abstract
INTRODUCTION The purpose of this study was to assess the feasibility of quantitative muscle ultrasound (QMUS) to visualize oral muscles and to establish normative data for muscle thickness and echo intensity of submental and tongue muscles in healthy children and young adults. The data were compared with those of 5 patients with Duchenne muscular dystrophy (DMD). METHODS Ultrasound images from the suprahyoid region and from the surface of the tongue were made in 53 healthy subjects aged 5 to 30 years. RESULTS All measurements were feasible in all subjects and patients with good reproducibility except for the mylohyoid muscle. Muscle thickness depended on height, and echo intensity depended on weight. Our findings suggest gradual involvement of oral muscles in DMD. CONCLUSIONS QMUS in oral muscles is feasible in healthy children, adults and patients with DMD. These data show that it is possible to differentiate between healthy persons and patients with DMD.
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Affiliation(s)
- Lenie Van Den Engel-Hoek
- Radboud University Nijmegen Medical Centre, Nijmegen Centre for Evidence Based Practice, Department of Rehabilitation, PO Box 9101 or 818, 6500 HB Nijmegen, The Netherlands.
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Pae A, Yoo RK, Noh K, Paek J, Kwon KR. The effects of mouthguards on the athletic ability of professional golfers. Dent Traumatol 2012; 29:47-51. [PMID: 22386044 DOI: 10.1111/j.1600-9657.2012.01123.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The purpose of this study was to determine the effect of stabilization splints and mouthguards on the athletic ability of professional golfers. For this study, eight professional golfers with a mean age of 20.5 were selected. These participants performed four trials of 10 driver swings and 10 putts with or without a stabilization splint (control group) or mouthguard. For the 4th trial, the splints were adjusted using a simple blind test so that the participants were unaware of the unilateral molar contact. The drive distance, club head speed, initial ball speed, and putting accuracy were compared and analyzed before and after the application of equal bilateral molar occlusion. When the bilateral molar occlusion was applied using a mouthguard or stabilization splint, the club head speed and driving distance in the presence of the oral appliances were significantly increased compared with those without the presence of either appliance (P < 0.05). Alternatively, the initial ball speed and putting accuracy in the presence of these appliances were increased compared with those without the presence of an appliance; however, this effect was not statistically significant. When the mouthguards or stabilization splints were adjusted to result in unilateral molar occlusion, the club head speed and driving distance in the presence of the appliances were significantly decreased compared with those that were obtained without these appliances (P < 0.05). The initial ball speed and the putting accuracy were not affected by the use of the appliances. No difference was observed in the effectiveness of the stabilization splint and mouthguard when bilateral molar occlusion was performed. The occlusion stability that results from stabilization splints and mouthguards is thought to increase the club head speed and driving distance in professional golf players.
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Affiliation(s)
- Ahran Pae
- Department of Prosthodontics, School of Dentistry, Kyung Hee University, Seoul, Korea
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Iinuma T, Arai Y, Fukumoto M, Takayama M, Abe Y, Asakura K, Nishiwaki Y, Takebayashi T, Iwase T, Komiyama K, Gionhaku N, Hirose N. Maximum Occlusal Force and Physical Performance in the Oldest Old: The Tokyo Oldest Old Survey on Total Health. J Am Geriatr Soc 2011; 60:68-76. [DOI: 10.1111/j.1532-5415.2011.03780.x] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
| | - Yasumichi Arai
- Department of Internal Medicine; Division of Geriatric Medicine
| | | | | | - Yukiko Abe
- Department of Internal Medicine; Division of Geriatric Medicine
| | - Keiko Asakura
- Department of Preventive Medicine and Public Health; Keio University School of Medicine; Tokyo; Japan
| | - Yuji Nishiwaki
- Department of Preventive Medicine and Public Health; Keio University School of Medicine; Tokyo; Japan
| | - Toru Takebayashi
- Department of Preventive Medicine and Public Health; Keio University School of Medicine; Tokyo; Japan
| | - Takashi Iwase
- Department of Pathology; Nihon University School of Dentistry; Tokyo; Japan
| | - Kazuo Komiyama
- Department of Pathology; Nihon University School of Dentistry; Tokyo; Japan
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Trawitzki L, Silva J, Regalo S, Mello-Filho F. Effect of class II and class III dentofacial deformities under orthodontic treatment on maximal isometric bite force. Arch Oral Biol 2011; 56:972-6. [DOI: 10.1016/j.archoralbio.2011.02.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2010] [Revised: 02/18/2011] [Accepted: 02/25/2011] [Indexed: 11/17/2022]
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Windhager S, Schaefer K, Fink B. Geometric morphometrics of male facial shape in relation to physical strength and perceived attractiveness, dominance, and masculinity. Am J Hum Biol 2011; 23:805-14. [PMID: 21957062 DOI: 10.1002/ajhb.21219] [Citation(s) in RCA: 128] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2010] [Revised: 07/11/2011] [Accepted: 08/20/2011] [Indexed: 11/08/2022] Open
Abstract
OBJECTIVES Evolutionary psychologists claim that women have adaptive preferences for specific male physical traits. Physical strength may be one of those traits, because recent research suggests that women rate faces of physically strong men as more masculine, dominant, and attractive. Yet, previous research has been limited in its ability to statistically map specific male facial shapes and features to corresponding physical measures (e.g., strength) and ratings (e.g., attractiveness). METHODS The association of handgrip strength (together with measures of shoulder width, body height, and body fat) and women's ratings of male faces (concerning dominance, masculinity, and attractiveness) were studied in a sample of 26 Caucasian men (aged 18-32 years). Geometric morphometrics was used to statistically assess the covariation of male facial shape with these measures. Statistical results were visualized with thin-plate spline deformation grids along with image unwarping and image averaging. RESULTS Handgrip strength together with shoulder width, body fat, dominance, and masculinity loaded positively on the first dimension of covariation with facial shape (explaining 72.6%, P < 0.05). These measures were related to rounder faces with wider eyebrows and a prominent jaw outline while highly attractive and taller men had longer, narrower jaws and wider/fuller lips. CONCLUSIONS Male physical strength was more strongly associated with changes in face shape that relate to perceived masculinity and dominance than to attractiveness. Our study adds to the growing evidence that attractiveness and dominance/masculinity may reflect different aspects of male mate quality.
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Affiliation(s)
- Sonja Windhager
- Department of Anthropology, University of Vienna, Wien, Austria.
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Masseter muscle thickness three years after surgical correction of class III dentofacial deformity. Arch Oral Biol 2011; 56:799-803. [DOI: 10.1016/j.archoralbio.2011.01.012] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2010] [Revised: 01/11/2011] [Accepted: 01/26/2011] [Indexed: 11/22/2022]
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Mixed longitudinal evaluation of masticatory performance in children 6 to 17 years of age. Am J Orthod Dentofacial Orthop 2011; 139:e427-34. [DOI: 10.1016/j.ajodo.2009.08.031] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2008] [Revised: 07/01/2009] [Accepted: 08/01/2009] [Indexed: 11/18/2022]
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Stephan CN. The human masseter muscle and its biological correlates: A review of published data pertinent to face prediction. Forensic Sci Int 2010; 201:153-9. [DOI: 10.1016/j.forsciint.2010.02.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2010] [Accepted: 02/23/2010] [Indexed: 11/25/2022]
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Serra MD, Duarte Gavião MB, dos Santos Uchôa MN. The use of ultrasound in the investigation of the muscles of mastication. ULTRASOUND IN MEDICINE & BIOLOGY 2008; 34:1875-1884. [PMID: 18774217 DOI: 10.1016/j.ultrasmedbio.2008.05.009] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2008] [Revised: 04/02/2008] [Accepted: 05/27/2008] [Indexed: 05/26/2023]
Abstract
The aim of this article was to review the literature concerning ultrasonography imaging (US) of the muscles of mastication and to discuss its use, advantages and disadvantages and the findings of the authors. A web search was performed using the terms "ultrasound" and "muscles". US has been shown to be a reliable method of great utility in the field of diagnosis of alterations in the muscles of mastication and for the study of changes during growth and aging. It should be preferred in comparison to computerized axial tomography (CT) and magnetic resonance imaging (MRI) because of its safety and cost advantages since it is as reliable and precise as these other techniques. Although various techniques have been used in ultrasonographic scanning, this article discusses those techniques most commonly adopted by the authors.
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Affiliation(s)
- Marcia Diaz Serra
- Department of Pediatric Dentistry, State University of Campinas, Piracicaba Dental School, SP/Brazil
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Otsubo H, Ochi A, Imai K, Akiyama T, Fujimoto A, Go C, Dirks P, Donner EJ. High-frequency oscillations of ictal muscle activity and epileptogenic discharges on intracranial EEG in a temporal lobe epilepsy patient. Clin Neurophysiol 2008; 119:862-8. [PMID: 18289931 DOI: 10.1016/j.clinph.2007.12.014] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2007] [Revised: 12/08/2007] [Accepted: 12/17/2007] [Indexed: 11/26/2022]
Abstract
OBJECTIVE During seizures, intracranial EEG electrodes can record ictal muscle movements. Our purpose was to differentiate the high-frequency oscillations (HFOs) of extracranial muscle contractions from those of intracranial epileptogenic discharges. METHODS Using intracranial video-EEG (IVEEG), we recorded seizures in a 17-year-old boy with left mesial-temporal lobe epilepsy. We used multiple band frequency analysis (MBFA) to differentiate extracranial HFOs of craniofacial muscle activities from intracranial HFOs recorded ictally and interictally. RESULTS During 11 seizures, IVEEG showed low-amplitude fast waves ( approximately 60Hz) starting at the left mesial-temporal electrodes. Ictal facial grimacing projected low-amplitude ( approximately 20muV) fast waves ( approximately 160Hz) on inferior lateral-temporal electrodes. Interictal chewing projected medium-amplitude ( approximately 100muV) fast waves ( approximately 140Hz) correlating to mouth movements. MBFA topographic power spectrograms revealed a sustained, consistent ictal fast-frequency band from electrodes in the seizure-onset zone and randomly scattered HFOs without a specific frequency band from ictal and interictal extracranial muscle contractions. CONCLUSIONS MBFA power spectrograms differentiated randomly scattered muscle HFOs without a specific frequency band at electrodes close to temporal muscles from ictal epileptic HFOs with a sustained, fast-frequency band in the seizure-onset zone. SIGNIFICANCE The pattern and distribution of frequency power spectrograms of extracranial HFOs differ from those of intracranial HFOs.
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Guimaraes AS, Carlsson GE, Marie SKN. Bite force and handgrip force in patients with molecular diagnosis of myotonic dystrophy. J Oral Rehabil 2007; 34:195-200. [PMID: 17302947 DOI: 10.1111/j.1365-2842.2006.01665.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Myotonic dystrophy is a multisystemic disease with varying symptomatology. The aim of this study was to compare the maximal bite force and handgrip force in patients with molecular diagnosis of myotonic dystrophy with those in a group of healthy individuals. It was hypothesized that these forces were reduced in the patients in comparison with the control subjects. The bite and handgrip forces of 37 patients with molecular diagnosis of myotonic dystrophy and 37 control subjects matched regarding age and gender were measured using an electronic dynamometer. The bite and handgrip forces were significantly lower in the myotonic dystrophy patient group when compared with the healthy controls (P < 0.0001). There were no significant force differences between genders, right- or left-hand side of mastication or hands in the myotonic dystrophy patient group whereas such differences were found among the controls. There were moderate but significant correlations between bite and handgrip force in both groups (r = 0.43-0.59; P < 0.01). It was concluded that there were considerable differences between the myotonic dystrophy group and the control subjects regarding both bite force and handgrip force. The weakness of the masticatory and hand muscles may have various negative consequences for oral function and dental health in patients with myotonic dystrophy.
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Affiliation(s)
- A S Guimaraes
- Head Institute, Federal University of Sao Paulo, Sao Paulo, Brazil.
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Abstract
Occlusal forces affect an oral implant and the surrounding bone. According to bone physiology theories, bones carrying mechanical loads adapt their strength to the load applied on it by bone modeling/remodeling. This also applies to bone surrounding an oral implant. The response to an increased mechanical stress below a certain threshold will be a strengthening of the bone by increasing the bone density or apposition of bone. On the other hand, fatigue micro-damage resulting in bone resorption may be the result of mechanical stress beyond this threshold. In the present paper literature dealing with the relationship between forces on oral implants and the surrounding bone is reviewed. Randomized controlled as well as prospective cohorts studies were not found. Although the results are conflicting, animal experimental studies have shown that occlusal load might result in marginal bone loss around oral implants or complete loss of osseointegration. In clinical studies an association between the loading conditions and marginal bone loss around oral implants or complete loss of osseointegration has been stated, but a causative relationship has not been shown.
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Affiliation(s)
- Flemming Isidor
- Department of Prosthetic Dentistry, Faculty of Health Sciences, School of Dentistry, University of Aarhus, Aarhus, Denmark.
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