scholarly journals Symmetrical dental occlusion blocking – changes of body sway and weight distribution in healthy subjects across 4 age decades

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
C. Maurer-Grubinger ◽  
F. Adjami ◽  
I. Avaniadi ◽  
W. Christian ◽  
C. Doerry ◽  
...  
Keyword(s):  
Musculoskeletal System ◽  
Weight Distribution ◽  
Healthy Subjects ◽  
Age Groups ◽  
The Body ◽  
Body Sway ◽  
Dental Occlusion ◽  
Large Sample Size ◽  
Relative Pressure ◽  
Rest Position

Abstract Objectives Symmetrical dental occlusion blocking is used in dentistry as a quick diagnostic tool to test for potential influences of the craniomandibular system on body sway and weight distribution. This study presents the changes of body sway and pressure distribution in healthy subjects, free of a temporomandibular dysfunction (TMD). Immediate effects between occlusal blocking and rest position on body sway and body weight distribution in general, as well as for both genders and for four age decades will be evaluated. Materials and methods 725 (396f/329 m) subjects (neither subjective signs of TMD nor acute/chronic complaints in the musculoskeletal system) volunteered (21 to 60 years) while both genders were divided into four age groups according to decades. A pressure measuring platform was used. Body sway and weight distribution were recorded in two dental occlusion conditions (a) in rest position and (b) symmetrical blocking (bicuspid region) by cotton rolls. Results Both, the frontal sway and the sagittal sway reduced by 0.67 mm (t(724) = − 3.9 (p <  0.001)) and by 0.33 mm (t(724) = − 3.4 (p <  0.001)). The relative pressure under the left forefoot increased by 0.33% (t(724) = 2.88 (p <  0.001)) and the relative pressure overall under the forefoot increased by 0.67% (t(724) = − 3.4 (p <  0.001)). Gender-specific, age-specific and BMI-specific reactions could not be identified. Conclusions Subjects, free of any TMD and with no complaints of the musculoskeletal system, show small changes of the body sway and weight distribution when biting symmetrically on a cotton roll. These changes are independent of age, gender or body mass index (BMI). Due to the relative large sample size, the presented results can also be seen as norm values when body sway is used as an additional assessment of a TMD.

scholarly journals Symmetrical Dental Occlusion Blocking - What are the Required Changes of Pressure Distribution to be Clinical Relevant?

2020 ◽  
Author(s):  
C Maurer-Grubinger ◽  
Ioanna Avaniadi ◽  
Frederic Adjami ◽  
Wolfgang Christian ◽  
Charlotte Doerry ◽  
...  
Keyword(s):  
Weight Distribution ◽  
Postural Sway ◽  
Age Groups ◽  
Body Sway ◽  
Dental Occlusion ◽  
Relative Pressure ◽  
Rest Position ◽  
And Gender ◽  
Specific Reactions ◽  
Gender Specific

Abstract Background: Symmetrical dental occlusion blocking (bicuspid region) is used in dentistry as a quick diagnostic test (“Meersseman test”) to check a possible influence of the temporomandibular system (TMS) on the movement system. Immediate effects between occlusal blocking and rest position on body sway and weight distribution in general and for both genders and for four age decades should be evaluated.Methods: 725 (396f/329m) healthy subjects (neither subjective signs of TMD nor acute/chronic complaints in the musculoskeletal system) volunteered (21 to 60 years) while both genders were divided into four age groups according to decades. A pressure measuring platform was used. The postural control (body sway and weight distribution) was recorded in two dental occlusion conditions (a) in rest position and (b) symmetrical blocking (bicuspid region) by cotton rolls. Results: The frontal sway reduced by 0.67mm (t(724) = -3.9 (p < 0.001)) and the sagittal sway by 0.33mm (t(724) = -3.4 (p < 0.001)). The relative pressure under the forefoot left increased by 0.33% (t(724) = 2.88 (p < 0.001)) and the relative pressure overall under the forefoot increased by 0.67% (t(724) = -3.4 (p < 0.001)). Gender-specific and age-specific reactions cannot be recorded.Discussion: In all subjects the postural sway improved slightly when blocking the occlusion ("Meersseman test") compared to the rest position. There is a slight shift of weight on the forefoot, especially the left forefoot. There exist no age- and gender-specific differences. Clinically relevant differences should apply outside the data between the 1st and 3rd quantile.

Age-Related Changes in Distribution of Body Weight on Soles of Feet for Selected Actions and Postures

1997 ◽  
Vol 85 (3_suppl) ◽  
pp. 1263-1271 ◽  
Author(s):  
Toshiaki Yanagida ◽  
Takaaki Asami
Keyword(s):  
Body Weight ◽  
Weight Distribution ◽  
Healthy Subjects ◽  
Age Groups ◽  
The Body ◽  
The Other ◽  
Elderly Subjects ◽  
Age Related ◽  
Soles Of The Feet ◽  
Age Related Changes

We investigated age-related changes in the distribution of body weight on soles of feet in 878 healthy subjects ranging from 5 to 80 years of age. By modifying Morton's Staticometer, we constructed an instrument for measuring body-weight distribution over three areas of soles of the feet, the big toe (inner forefoot), the other four toes combined (outer forefoot) and the heels for both feet, thus a total of six areas. The weights in the six areas were recorded at the completion of nine selected actions and postures. We observed that for inhaling and exhaling standing postures, generally younger subjects had a ratio close to 1:2:3 for weights recorded for the inner toe:outer toes:heels as observed by Morton, but elderly subjects had a smaller value than 3 for the heel. The body-weight distribution tended to shift from heels to outer toes across age groups, which was more distinctly observed in women than in men.

scholarly journals Standard reference values of weight and maximum pressure distribution in healthy adults aged 18–65 years in Germany

2020 ◽  
Vol 39 (1) ◽  
Author(s):  
D. Ohlendorf ◽  
K. Kerth ◽  
W. Osiander ◽  
F. Holzgreve ◽  
L. Fraeulin ◽  
...  
Keyword(s):  
Body Weight ◽  
Pressure Distribution ◽  
Reference Values ◽  
Effect Size ◽  
Weight Distribution ◽  
Age Groups ◽  
Healthy Adults ◽  
The Body ◽  
Maximum Pressure ◽  
Left And Right

Abstract Background The aim of this study was to collect standard reference values of the weight and the maximum pressure distribution in healthy adults aged 18–65 years and to investigate the influence of constitutional parameters on it. Methods A total of 416 healthy subjects (208 male / 208 female) aged between 18 and 65 years (Ø 38.3 ± 14.1 years) participated in this study, conducted 2015–2019 in Heidelberg. The age-specific evaluation is based on 4 age groups (G1, 18–30 years; G2, 31–40 years; G3, 41–50 years; G4, 51–65 years). A pressure measuring plate FDM-S (Zebris/Isny/Germany) was used to collect body weight distribution and maximum pressure distribution of the right and left foot and left and right forefoot/rearfoot, respectively. Results Body weight distribution of the left (50.07%) and right (50.12%) foot was balanced. There was higher load on the rearfoot (left 54.14%; right 55.09%) than on the forefoot (left 45.49%; right 44.26%). The pressure in the rearfoot was higher than in the forefoot (rearfoot left 9.60 N/cm2, rearfoot right 9.51 N/cm2/forefoot left 8.23 N/cm2, forefoot right 8.59 N/cm2). With increasing age, the load in the left foot shifted from the rearfoot to the forefoot as well as the maximum pressure (p ≤ 0.02 and 0.03; poor effect size). With increasing BMI, the body weight shifted to the left and right rearfoot (p ≤ 0.001, poor effect size). As BMI increased, so did the maximum pressure in all areas (p ≤ 0.001 and 0.03, weak to moderate effect size). There were significant differences in weight and maximum pressure distribution in the forefoot and rearfoot in the different age groups, especially between younger (18–40 years) and older (41–65 years) subjects. Discussion Healthy individuals aged from 18 to 65 years were found to have a balanced weight distribution in an aspect ratio, with a 20% greater load of the rearfoot. Age and BMI were found to be influencing factors of the weight and maximum pressure distribution, especially between younger and elder subjects. The collected standard reference values allow comparisons with other studies and can serve as a guideline in clinical practice and scientific studies.

scholarly journals The Effect of Clenching and Occlusal Instability on Body Weight Distribution, Assessed by a Postural Platform

2019 ◽  
Vol 2019 ◽  
pp. 1-9
Author(s):  
Konstantinos X. Michalakis ◽  
Savvas N. Kamalakidis ◽  
Argiris L. Pissiotis ◽  
Hiroshi Hirayama
Keyword(s):  
Body Weight ◽  
Weight Distribution ◽  
Healthy Adult ◽  
Statistical Significance ◽  
The Body ◽  
Research Project ◽  
Rest Position ◽  
Lateral Body ◽  
Chi Squared ◽  
The Right

The purpose of this research project was to investigate whether or not clenching and occlusal instability of Angle’s Class I malocclusion have an effect on body weight distribution in healthy adult subjects. Twenty adults (fourteen males and six females, ages 27-40, mean age 31.7 years, SD 3.32) were included in this study. The MatScan (Tekscan Inc., Boston, MA) system was used to measure the body weight distribution changes of the subjects. Four body weight distribution measurements were taken for each subject while (1) the mandible was in the rest position (no tooth contact) (RES), (2) subject was clenching (maximum intercuspation of the teeth with heavy occlusal forces) (CL), (3) subject was clenching on the right side (with 1 mm disocclusion on the left side) (CLR), and (4) subject was clenching on the left side (with 1 mm disocclusion on the right side) (CLL). The lateral and the anteroposterior body weight distribution changes during the different clenching conditions (both sides, right, and left) were compared to those at which the mandible was at the rest position. The statistical significance of these results was tested with a Chi-Squared test (p<0.05). Based on the findings of the present study it was concluded that clenching and occlusal instability are associated with lateral body weight distribution changes.

scholarly journals Age-related changes of human balance during quiet stance

2008 ◽  
pp. 957-964
Author(s):  
D Abrahamová ◽  
F Hlavačka
Keyword(s):  
Healthy Subjects ◽  
Balance Control ◽  
Age Groups ◽  
Postural Instability ◽  
Body Sway ◽  
Quiet Stance ◽  
Foot Pressure ◽  
Age Related ◽  
Control Change ◽  
Static Conditions

Certain aspects of balance control change with age, resulting in a slight postural instability. We examined healthy subjects between 20-82 years of age during the quiet stance under static conditions: at stance on a firm surface and/or on a compliant surface with eyes either open or closed. Body sway was evaluated from centre of foot pressure (CoP) positions during a 50 sec interval. The seven CoP parameters were evaluated to assess quiet stance and were analyzed in three age groups: juniors, middle-aged and seniors. The regression analysis showed evident increase of body sway over 60 years of age. We found that CoP parameters were significantly different when comparing juniors and seniors in all static conditions. The most sensitive view on postural steadiness during quiet stance was provided by CoP amplitude and velocity in AP direction and root mean square (RMS) of statokinesigram. New physiological ranges of RMS parameter in each condition for each age group of healthy subjects were determined. Our results showed that CoP data from force platform in quiet stance may indicate small balance impairment due to age. The determined physiological ranges of RMS will be useful for better distinguishing between small postural instability due to aging in contrast to pathological processes in the human postural control.

scholarly journals Relationship Between Dental Occlusion Class, Head Position and Body Posture of The Upper Part of the Body

2020 ◽  
Vol 2 (9) ◽  
Author(s):  
Giedrė Jurgelaitienė ◽  
Vilma Dudonienė ◽  
Marius Jurgelaitis
Keyword(s):  
Cervical Spine ◽  
Temporomandibular Disorders ◽  
Age Groups ◽  
Head Position ◽  
The Body ◽  
Body Posture ◽  
Dental Occlusion ◽  
Upper Cervical Spine ◽  
Functional Abnormality ◽  
Therapeutic Implications

The close anatomical and neuronal (sensory and motor) linkage between the upper cervical spine and the craniofacial section documented in literature accounts for relationships between the jaw position and the inclination of the cervical spine. The issue of relationships between dental occlusion, body posture and temporomandibular disorders is a controversial topic in dentistry, and it is often a source of speculations. A description of the available knowledge about the physiology of the body posture – dental occlusion relationship is fundamental to discuss the possible diagnostic and therapeutic implications of the assessment of body posture in subjects with occlusal abnormalities or patients with temporomandibular disorders. The orthostatic position of the skull is kept by a complex muscular mechanism involving head, neck and shoulder girdle muscles. Since TMJ, cervical spine and occlusion are intimately related, a functional abnormality or the position of one of them may affect the function or the position of the others (Baião da Neiva et al., 2011). Object of the study: relationship between dental occlusion class, head position and body posture of the upper part of the body. Aim of the study: to determine relationship between dental occlusion class, head position and body posture of upper part of the body. Methods and organization of the study: The study involved 52 subjects. Participants were divided into two age groups: first group (n = 42, 20–28 years) and second group (n = 10, 45–49). 1987 W. W. K. Hoeger subjective volunteer’s posture evaluation model, where the deviation from the norm was defined by score, was chosen for the evaluation. Also the posture was rated digitally. Subjects’ photographs of posture were rated by software AutoCAD 2013 programme. Dental occlusion was assessed according to Angle classification. Conclusion: No strong, statistically significant linkage between the evaluated parameters were found. Additional research is needed to ground scientifically based relationship between masticatory system, musculoskeletal system and body posture.Keywords: dental occlusion class, head position, body posture.

scholarly journals Ultrasonography of the metacarpophalangeal joints in healthy subjects using an 18 MHz transducer.

2015 ◽  
Vol 17 (2) ◽  
pp. 185 ◽  
Author(s):  
Daniela Fodor ◽  
Ioana Felea ◽  
Daniela Popescu ◽  
Adelina Moţei ◽  
Paula Ene ◽  
...  
Keyword(s):  
Healthy Subjects ◽  
Power Doppler ◽  
Age Groups ◽  
The Body ◽  
Dominant Hand ◽  
Pathological Findings ◽  
Metacarpal Head ◽  
Grade Scale ◽  
Kappa Value ◽  
Kappa Agreement

Aim: To evaluate the metacarpophalangeal (MCP) joints (MCP2 and 5) in healthy subjects by ultrasonography (US) using a high frequency transducer (18 MHz) and to verify the interobserver agreement. Material and methods: We enrolled 50 healthy volunteers (37 women, age between 30-58 years, mean age 41.7 years, divided into 3 groups according to age: 30-39, 40-49, and 50-58 years). The subjects were successively evaluated by 4 rheumatologists: 2 experienced (team A) and 2 beginners (team B) in US. Seven dorsal and palmar longitudinal scanning positions and a supplementary scan for MCP cartilage were performed. The bone surface (erosions, osteophytes), the intra-articular content (synovial thickening and vascularization, 4 grade scale), and the aspect of the metacarpal head cartilage were analyzed. The anterior palmar recess was measured. The time for examination was recorded. Results: Erosions were detected in 7% of joints by team A and 2% by team B (p<0.05, kappa agreement 0.567) in subjects over 40 years. The agreement by team A in the detection of the erosions was very good (kappa value 0.83). A moderate positive correlation was obtained between the presence of erosions and age (r= 0.401, p=0.004). Osteophytes were identified only on the dorsal scan in subjects over 50 years (in 3.5% of joints team A, 1.5% team B, p>0.05, kappa value 0.421). No grade 1 synovitis was observed by team A but 4 joints with grade 1 synovitis were identified by team B (p<0.05) from the dorsal scan. The dimensions of the palmar recess had large distribution (MCP 2 between 0.55-1.3 mm; MCP 5 between 0.6-1.2 mm). No statistical significant differences were obtained when comparing the dimensions of the two hands, the values obtained in age-groups (all p>0.05). No statistical significant correlations were obtained between the dimensions of palmar recess and the body mass index or dominant hand (all p>0.05). No pathological findings were found in the examination of the metacarpal head cartilage. Power Doppler investigation found the presence of grade 1 signal in 2.5% joints by team A and 1.5% by team B (p>0.05) only in the dorsal scans. The mean time for examination was 7.8±1.74 min in team A and 13.78±2.96 min in team B (p<0.05). Conclusions: In healthy subjects pathological findings are occasionally encountered, especially erosions and osteophytes. Using an 18 MHz transducer the aspect of grade 1 synovitis was not encountered in healthy non-inflammatory MCP joints. There is a permanent need for standardized training and examination in musculoskeletal US.

Differences in Muscle Strength, Balance Function, Quality of Life, and Fatigue Levels between Cancer Survivors and Healthy Subjects: a cross-sectional study.

2019 ◽  
Author(s):  
Shinichiro Morishita ◽  
Ryo Hirabayashi ◽  
Atsuhiro Tsubaki ◽  
Osamu Aoki ◽  
Jack B Fu ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Muscle Strength ◽  
Cancer Survivors ◽  
Healthy Subjects ◽  
Short Form ◽  
The Body ◽  
Body Sway ◽  
Balance Function ◽  
Cross Sectional

Abstract Objectives　We aimed to investigate the differences as well as the relationship between muscle strength, balance function, quality of life (QOL), and fatigue in cancer survivors and healthy subjects. Design A cross-sectional observational study.Setting The Relay For Life Niigata in JapanParticipants Forty-one cancer survivors and 33 healthy subjects were included. Methods Muscle strength was evaluated via handgrip and knee extensor strength. Balance function was evaluated using the Timed Up and Go (TUG) test, and body sway was tested using a force platform. QOL was assessed using the Medical Outcome Study 36-item Short-Form Health Survey. Fatigue was measured using the brief fatigue inventory. Results Cancer survivors exhibited significantly decreased muscle strength, higher TUG, lower QOL, and higher fatigue than healthy subjects (P < 0.05). There were no significant differences between the two groups for any parameters of the body sway tests. There was a relationship between body sway test and QOL (P < 0.05) among cancer survivors. Additionally, some subscales for fatigue and QOL (P < 0.05) were related among cancer survivors; these relationships were stronger than those observed among healthy subjects. Conclusion Cancer survivors have the same balance function as healthy subjects despite a decrease in muscle strength. Cancer survivors initially tend to have decreased muscle strength, and thereafter worse balance function.

The influence of osteopathic correction on the rate of various rhythms of the body

2019 ◽  
pp. 64-71 ◽  
Author(s):  
A. E. Chernikova ◽  
Yu. P. Potekhina
Keyword(s):  
Heart Rate ◽  
Respiratory Rate ◽  
Age Groups ◽  
Biomechanical Properties ◽  
Dispersion Analysis ◽  
The Body ◽  
Body Tissues ◽  
Age Related ◽  
Significant Difference ◽  
Before And After

Introduction. An osteopathic examination determines the rate, the amplitude and the strength of the main rhythms (cardiac, respiratory and cranial). However, there are relatively few studies in the available literature dedicated to the influence of osteopathic correction (OC) on the characteristics of these rhythms.Goal of research — to study the influence of OC on the rate characteristics of various rhythms of the human body.Materials and methods. 88 adult osteopathic patients aged from 18 to 81 years were examined, among them 30 men and 58 women. All patients received general osteopathic examination. The rate of the cranial rhythm (RCR), respiratory rate (RR) heart rate (HR), the mobility of the nervous processes (MNP) and the connective tissue mobility (CTM) were assessed before and after the OC session.Results. Since age varied greatly in the examined group, a correlation analysis of age-related changes of the assessed rhythms was carried out. Only the CTM correlated with age (r=–0,28; p<0,05) in a statistically significant way. The rank dispersion analysis of Kruskal–Wallis also showed statistically significant difference in this indicator in different age groups (p=0,043). With the increase of years, the CTM decreases gradually. After the OC, the CTM, increased in a statistically significant way (p<0,0001). The RCR varied from 5 to 12 cycles/min in the examined group, which corresponded to the norm. After the OC, the RCR has increased in a statistically significant way (p<0,0001), the MNP has also increased (p<0,0001). The initial heart rate in the subjects varied from 56 to 94 beats/min, and in 15 % it exceeded the norm. After the OC the heart rate corresponded to the norm in all patients. The heart rate and the respiratory rate significantly decreased after the OC (р<0,0001).Conclusion. The described biorhythm changes after the OC session may be indicative of the improvement of the nervous regulation, of the normalization of the autonomic balance, of the improvement of the biomechanical properties of body tissues and of the increase of their mobility. The assessed parameters can be measured quickly without any additional equipment and can be used in order to study the results of the OC.

Evaluation of Body Sway Using Tactile Stimuli on the Body Trunk

2016 ◽  
Vol 136 (8) ◽  
pp. 1135-1141
Author(s):  
Ryo Hasegawa ◽  
Amir Maleki ◽  
Masafumi Uchida
Keyword(s):  
The Body ◽  
Body Sway ◽  
Tactile Stimuli
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