A Study of the Masticatory Movement at the Incision Inferius

Ai, Minoru

doi:10.2186/jjps.6.164

Cited by 19 publications

(18 citation statements)

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“…The length of the occlusal glide has been reported to be between 1 and 4 mm at the incisor by several authors (Ai, 1962; Ahlgren, 1966; Ingervall, 1972; Suit et al ., 1976). Our estimates fall within the reported ranges of these papers.…”

Section: Discussionmentioning

confidence: 99%

“…Several studies have attempted to measure the length of the glide during the occlusal phase (Ai, 1962; Ahlgren, 1966; Ingervall, 1972; Suit et al ., 1976; Yaeger, 1978). These reports used several different criteria to define the beginning and end of the occlusal glide: (i) An abrupt change in the direction of the movement near the end of the closing pathway, (ii) much lower variability near the end of the closing pathway, and (iii) where the terminal or initial parts of the chewing cycles could be superimposed on the pathways taken by the mandible during lateral excursions with occlusal contacts (Woda, Vigneron & Kay, 1979).…”

Section: Discussionmentioning

confidence: 99%

“…The occlusal phase of the chewing cycle is thought to be extremely important because it is here that occlusal function is carried out as the upper and lower teeth make contact. It is also thought to be critical because it includes points commonly used in kinematic analyses to mark the beginning and end of the chewing cycles (Ai, 1962; Suit, Gibbs & Benz, 1976). Although numerous studies have been published on voluntary mandibular excursions during tooth contact in adults (Mizuno, 1989; Nishi, 1989) few reports have investigated the length of the occlusal glide during chewing movements.…”

Section: Introductionmentioning

confidence: 99%

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Length of the occlusal glide at the lower incisal point during chewing

Hayasaki

Sawami

Saitoh

et al. 2002

J of Oral Rehabilitation

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The purpose of this study was to estimate the length of the occlusal glide during gum chewing at the lower incisal point. Mandibular excursions with occlusal contacts in 25 females with permanent dentition were recorded using an optoelectronic system that can measure mandibular movement with 6 d.f. at a sampling frequency of 100 Hz. A curved mesh diagram of incisor coordinates during maximum mandibular excursions (CMDME) was plotted. Gum chewing movement was also measured using the same system and computer software which divided the chewing movement into cycles at each maximum opening position. Each cycle was standardized at 0.1 mm intervals from the most closed position. Finally, the distance between the CMDME and each position of the incisor during a chewing cycle was calculated. Whenever, this distance was less than 0.2 mm opposing teeth were considered to be in contact. The occlusal glide was defined as the distance travelled by the lower incisal point as the mandible moved along occlusal contacts of the CMDME. The vertical coordinates at the beginning of the occlusal glide (during closing) and at the end of occlusal glide (during opening) were also calculated. The lengths of the occlusal glide pathway averaged 1.29 mm during closing and 1.55 mm during opening, a total length of 2.84 mm. Mean vertical coordinates at the beginning and end of the glide were -0.95 and -1.12 mm from intercuspal position, respectively.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Length of the occlusal glide at the lower incisal point during chewing

Hayasaki

Sawami

Saitoh

et al. 2002

J of Oral Rehabilitation

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“…An early investigation by Jankelson 5 which reported an absence of tooth contacts has been clarified by other investigators. [6][7][8][9][10][11][12][13] Research in the past 16 years has supported the early suggestion of Hildebrand 14 that there is lateral tooth contact, both on the opening and the closing movements of the mandible during mastication. Our results, based on a unique method of determination, also support Hildebrand's findings.…”

Section: Discussionmentioning

confidence: 98%

Study of Gliding Tooth Contacts during Mastication

Suit

Gibbs²,

Benz

1976

Journal of Periodontology

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“…Many dentists are simply not accustomed to using such data. Many previous studies have focused on mandibular excursion, because of its similarity to the occluding phase of mastication ( Ai 1962). Reports that have significantly advanced the understanding of mandibular movement include the following.…”

Section: Introductionmentioning

confidence: 99%

CMDME (curved mesh diagram of mandibular excursion) method for visualization and diagnosis of mandibular movement

Hayasaki

Nakata

Nishijima

et al. 1998

J of Oral Rehabilitation

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The CMDME (curved mesh diagram of mandibular excursion) method was developed for easy visualization and diagnosis of mandibular movement. This method uses measured mandibular movement to produce a diagram of the range, shape, and inclination of mandibular excursion in three dimensions using any arbitrary landmark of the mandible. First, the mandibular movement of a subject was measured by an opto-electronic movement analysis system capable of measuring mandibular movement with six degrees-of-freedom at a sampling frequency of 100 Hz. For the measurement, the subject was initially instructed to perform four repetitions of mandibular excursion at will, with tooth contact, each lasting 30 s. A total of 12 000 positions of the mandible were thus obtained. Secondly, an attempt was made to match these positions to intersection points (0.1 mm apart) of a CMDME (i.e. mesh) for arbitrary mandibular landmarks with intercuspal position at the origin. The CMDME method can visualize mandibular excursion, and can be used to compare several landmarks, different subjects, or different times. This makes this method an effective diagnostic tool for mandibular movement.

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A Study of the Masticatory Movement at the Incision Inferius

Cited by 19 publications

References 0 publications

Length of the occlusal glide at the lower incisal point during chewing

Length of the occlusal glide at the lower incisal point during chewing

Study of Gliding Tooth Contacts during Mastication

CMDME (curved mesh diagram of mandibular excursion) method for visualization and diagnosis of mandibular movement

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