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Systematic changes of the static upper body posture with a symmetric occlusion condition.

Abstract：

BACKGROUND:Temporary occlusal changes and their influence on the upper body statics are still controversially discussed. Furthermore, concrete statements on whether age- or gender-specific differences in neurophysiological reactions exist are missing. Therefore, it is the aim of this study to evaluate the immediate effects of a symmetrical occlusion blocking on the upper body posture. These effects shall be investigated for both genders and for a larger age range. METHODS:In this study, 800 (407f/393 m) subjects volunteered aged from 21 to 60 years. Both genders were divided into four age groups according to decades. The three-dimensional upper body posture was measured by using the rasterstereography (ABW-Bodymapper). The habitual static posture was measured in two dental occlusion conditions (a) in rest position and (b) symmetrical blocking in the bicuspid region by cotton rolls. RESULTS:A significant reduction of the trunk length (0.72 mm; p < 0.001), an increase of the lumbar (0.30°; p < 0.001) and the thoracic bending angle (0.14°; p = 0.001), a reduction of the spinal forward decline (0.16°; p < 0.001) and a reduction of the scapular distance (0.36 mm; p = 0.001) was found. Gender-specific reactions can only be recorded in scapular distance, in that regard men reduce this distance while over all age groups women did not show a significant change. DISCUSSION:Slight gender- and age-independent reactions due to a symmetric occlusion blockade are shown: A gender independent reaction of the spinal related variables in the sagittal plane (thoracic and lumbar flexion angle, trunk length, spinal forward decline). In addition, a gender specific change of the shoulder blade distance could be observed, where men reduced the distance while female did not show a change. However, since these reactions are of a minimum amount, it can be concluded that neurophysiological compensation mechanisms work equally well regardless of age and sex, and the upper body posture of healthy people changes only very slightly due to a temporarily symmetrical altered bite position.

journal_name

BMC Musculoskelet Disord

journal_title

BMC musculoskeletal disorders

authors

Maurer-Grubinger C,Avaniadi I,Adjami F,Christian W,Doerry C,Fay V,Fisch V,Gerez A,Goecke J,Kaya U,Keller J,Krüger D,Pflaum J,Porsch L,Wischnewski C,Scharnweber B,Sosnov P,Oremek G,Groneberg DA,Ohlendorf D

doi

10.1186/s12891-020-03655-x

subject

Has Abstract

pub_date

2020-09-26 00:00:00

pages

636

issue

issn

1471-2474

pii

10.1186/s12891-020-03655-x

journal_volume

pub_type

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Systematic changes of the static upper body posture with a symmetric occlusion condition.