Effects of Changing Body Position on Dental Occlusion

Lean, Lewis F. Mc; Brenman, Henry S.; Friedman, Manfred

doi:10.1177/00220345730520050701

Cited by 65 publications

(31 citation statements)

References 9 publications

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“…Many studies have shown that the position obtained by this method is anterior to the centric relation and even to the position of maximum intercuspation (Remien and Ash, 1974;Azarbal, 1977). It is also independent of head position (Mc Lean et al, 1973;Remien and Ash, 1974). Furthermore, the literature clearly shows that electrical transcutaneous stimulation does not excite the afferent reflex pathways, and serves only to stimulate the muscle fibers and/or the terminal motor endings directly (De Boever and McCall, 1972;Bessette and Quinlivan, 1973;Dao et al, 1988).…”

Section: (112) Effects Of a Modification Of Head Position On The Antmentioning

confidence: 99%

Regulation of Mandibular Postures: Mechanisms and Clinical Implications

Woda¹,

Pionchon²,

Palla

2001

Critical Reviews in Oral Biology & Medicine

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This review argues that (1) the habitual mandibular position is constantly variable and so cannot be considered as a craniomandibular reference point, (2) there is no unique centric relation, (3) mandibular posture greatly depends on head posture, (4) clinical evaluation of the occlusal vertical dimension is mostly empirical, and (5) neither the vertical dimension at rest nor the centric relation can be determined by means of existing instrument-based clinical methods. However, some physiological conditions exist that facilitate the recording of craniomandibular position.

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Section: (112) Effects Of a Modification Of Head Position On The Antmentioning

confidence: 99%

Regulation of Mandibular Postures: Mechanisms and Clinical Implications

Woda¹,

Pionchon²,

Palla

2001

Critical Reviews in Oral Biology & Medicine

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“…It is believed that the effects of gravity on the mandible, muscles of mastication, the upper muscles of the hyoid, the lower muscles of the hyoid, the platysma muscle, and the skin and ligaments play a large role in causing backward deviation of the mandible in supine patients. 1,6,7 Conversely, when the head was inclined forward, the backward tug of the neck muscles, skin, and other tissues on the mandible is reduced. This causes a change in the equilibrium between gravity and these tissues, resulting in a consequent suppression of the backward deviation of the mandible.…”

Section: Discussionmentioning

confidence: 99%

“…1,[3][4][5][6][7][8][9][10][11][12][13] However, the paucity of research in this area under clinical conditions indicates that there is an inadequate understanding of the effects on mandibular position in the body and head positions patients may assume during dental procedures. In addition, there is no literature identified on the effects of head posture on mandibular position in supine patients; there is also no detailed investigation of the interrelationship between body and head postures.…”

Section: Introductionmentioning

confidence: 99%

Influence of Body and Head Posture on Deviation of the Incisal Point Undergoing Dental Treatment

Ishii

Koide

Ueki

et al. 2007

Prosthodont Res. Pract.

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In order to establish patient posture standards for use in the clinic, the present research considered the influence on mandibular position of the head and body posture of patients undergoing dental treatment. AbstractPurpose: The objectives of this study were to determine how changes in body and head position undergoing dental treatment affect mandibular position, and to develop a set of standards for patient posture.Methods: Mandibular position was investigated in 8 subjects with normal occlusion and not suffering any stomatognathic dysfunction. This was done by measuring the location of the tapping point on the incisal point using a Gnathohexagraph (a 3-dimensional jaw movement measurement device with 6 degrees of freedom), with the subject's head in 4 different positions while sitting, and the body and head in 16 different positions with the subject supine, and then comparing deviation from the reference position in each of these positions. Statistical analysis of data was performed using first, repeated measures of 1-way ANOVA (α =.05), second Bonferroni's multiple comparison test was undertaken in seated positions. In supine positions, repeated measures of 2-way ANOVA was performed, and followed by Bonferroni's multiple comparison test was performed. Results:The incisal point deviated significantly in the anteroposterior direction due to changes in head and body position. With the subjects seated, the incisal point tended to move backwards when the subjects were asked to lean backwards from the reference position. The incisal point tended to move forward when the subjects were asked to lean forward. With the subjects in a supine position, the incisal point was inclined backwards. The degree of backwards inclination of the incisal point tended to decline as the head position was varied from 10 degrees backwards to 20 degrees forward, regardless of the degree of backwards inclination of the body. Conclusion:Changes in body and head posture undergoing dental treatment affect incisal point deviation.

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“…It does influence the trajectory of closing, and the position of the initial occlusal contacts 19,24,58,61,90 On the other hand, a forward inclined head posture does not appear to have any effect on initial occlusal contacts 59 ;…”

Section: ---A Few Commentsmentioning

confidence: 93%