Masticatory movements of the jaw measured at angles of approach to the occlusal plane

Gibbs, Charles H.; Suit, Stanley R.; Benz, Steven T.

doi:10.1016/0022-3913(73)90184-4

Cited by 23 publications

(7 citation statements)

References 3 publications

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“…The middle third of the movement was markedly variable but became more regular as it approached the intercuspal position. In the sagittal plane, movements were more regular; and in contrast to the findings of Gibbs et al (1973) , closing strokes were partly or totally located anterior to opening movements. As mastication proceeded, closing strokes had a more posterior trajectory.…”

Section: The Chewing Pattern In Natural Dentitioncontrasting

confidence: 75%

“…Regarding paths of motion in the sagittal plane, it was observed that the opening phase was anterior to the closing phase. In a subsequent paper, Gibbs, Suit & Benz (1973) observed a relationship between the sagittal and frontal angles of approach of the incisors during mastication and concluded that the flatter the closing pattern in the frontal plane, the steeper it appeared in the sagittal plane. Although the maximum error of their measuring system was very small (0·13 mm), the sensing mechanism was still based on the contact method, and the apparatus was bulky compared to the modern system (mandibular kinesiograph, sirognathograph, etc.)…”

Section: The Chewing Pattern In Natural Dentitionmentioning

confidence: 97%

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Does chewing performance depend upon a specific masticatory pattern?

Yamashita¹,

Hatch²,

Rugh³

1999

J of Oral Rehabilitation

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The purpose of this article is to review the literature concerning the ideal chewing pattern for best chewing performance. We conclude that at this time there is not one ideal chewing pattern which can be used clinically or in research to assess the health of the mastication apparatus nor to predict chewing performance. It is clear that human masticatory behaviour is one of the most complex human behaviours. Chewing is under the control of the central pattern generator located in the brain stem but is influenced by dental and temporomandibular joint morphology. The most important portion of the chewing cycle is the area entering and leaving the intercuspal position where gliding contacts occur. Maximal chewing capability will likely occur when the chewing pattern follows the dental anatomy unique to the individual. The chewing cycle appears to increase the lateral component of its movement when increased chewing efficiency is required. These situations include increased hardness or the size of bolus, the position of the bolus and the results of the proceeding chewing stroke. The chewing pattern for any one cycle is influenced by a number of factors, thus it is not surprising that the question of the ideal chewing pattern remains unresolved.

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Section: The Chewing Pattern In Natural Dentitioncontrasting

confidence: 75%

Section: The Chewing Pattern In Natural Dentitionmentioning

confidence: 97%

Does chewing performance depend upon a specific masticatory pattern?

Yamashita¹,

Hatch²,

Rugh³

1999

J of Oral Rehabilitation

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“…It was demonstrated in the present study that the alteration of occlusal guidance had no influence on masticatory movements in the present vertical‐group subjects. This finding is in opposition to the consensus that occlusal guidance influences masticatory movements through the proprioception of the periodontal membrane when the teen are in contact (Gibbs et al ., 1973; Gillings et al ., 1973; Gibbs & Lundeen, 1982). Two reasons are possible to explain this finding.…”

Section: Discussioncontrasting

confidence: 82%

Different responses of masticatory movements after alteration of occlusal guidance related to individual movement pattern

Ogawa¹,

Ogawa

Koyano

2001

J of Oral Rehabilitation

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We hypothesized that the motor response of the masticatory system to peripheral inputs varies according to the functional potential of an individual. The speci®c aim of the present study was to determine whether individually different types of masticatory patterns, especially with respect to the closing movement pattern, would produce different motor responses to an alteration of occlusal guidance. The inclination of the occlusal guidance was steepened by approximately 10 degrees by attaching a metal overlay to the lingual surface of the maxillary working-side canine. The masticatory movements of 20 young adults were measured using a three-dimensional mandibular movement analysis system before and after the alteration of occlusal guidance. The individual masticatory patterns were divided into two groups based on the closing movement pattern before the alteration of occlusal guidance, i.e. vertical and lateral types. The alteration of occlusal guidance signi®cantly in¯uenced the masticatory closing angle, closing time, occlusal time, the stability of the opening angle and the cycle time in the lateral-type group (n = 9, paired t-test; P < 0 á 05), while no signi®cant changes were found in the vertical-type group (n = 11). These differences in motor response between the two groups were not found in the overall analysis of all the 20 subjects. We concluded that the oral motor response to the alteration of occlusal guidance depends on the individual masticatory movement pattern. Because the present analysis of subgroups of the subjects revealed motor response ®ndings different from those in the overall analysis of all the 20 subjects, such potential subgroupings should be considered as an attempt to identify a speci®c effect of peripheral inputs on masticatory function in humans.

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“…There is currently no accepted standard for defining either the end of slow opening or the beginning of slow closing. Previous animal studies have used vertical velocity to mark the boundaries of these phases (Crompton et al, 1977;Hiiemae, 1978;Hiiemae and Crompton, 1985;Hiiemae and Kay, 1973;Oron and Crompton, 1985), while many human studies have used a specified separation between the teeth (Gibbs et al, 1971(Gibbs et al, , 1973Messerman, 1963;Kiliaridis et al, 1991;Kjelberg et al, 1995;Suit et al, 1976;Ferrarrio et al, 1990;Woda et al, 1979;Wood et al, 1981) with the amount of separation differing among studies. If the phase boundaries were determined by a specified separation, then the results of this study indicate that slow opening ends and slow closing begins at a significantly lower velocity in women than in girls.…”

Section: Discussionmentioning

confidence: 99%

Normal masticatory function of girls and young women: mandibular masticatory movements

Snipes

Throckmorton

Buschang³

1998

Am. J. Hum. Biol.

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Mandibular masticatory movements were evaluated in 10 young adult women and 12 young girls. All subjects had normal occlusion with minimal overjet. Masticatory movements of the incisors were recorded in three dimensions with an Optotrak® camera system while subjects chewed gum in a habitual manner for 20 seconds. A masticatory analysis program divided each masticatory cycle into four phases and averaged the duration, excursions, and velocities of all cycles for each subject. Duration of the total cycle was longer in women because they had longer slow opening and slow closing phases than girls. Women had a significantly larger vertical component of opening during slow opening and the power stroke than girls. Women also had a significantly larger posterior component of opening during slow opening and the power stroke than did girls. At maximum opening, women also tended to have the incisors in a more posterior position. There were no differences between the groups for the amount of maximum lateral excursion during chewing. Vertical velocity during fast opening and fast closing was slower for women, but there were no age‐related differences during the slow open and slow close phases. Am. J. Human Biol. 10:53–62, 1998. © 1998 Wiley‐Liss, Inc.

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Masticatory movements of the jaw measured at angles of approach to the occlusal plane

Cited by 23 publications

References 3 publications

Does chewing performance depend upon a specific masticatory pattern?

Does chewing performance depend upon a specific masticatory pattern?

Different responses of masticatory movements after alteration of occlusal guidance related to individual movement pattern

Normal masticatory function of girls and young women: mandibular masticatory movements

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