Computerized kinesiography in the study of mastication in dentate subjects

Neill, D. J.; Howell, Pgt

doi:10.1016/0022-3913(86)90046-6

Cited by 50 publications

(38 citation statements)

References 11 publications

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“…Splint therapy did not make any significant change. For the same group of patients, at 14 the horizontal plane, H-II chewing cycle was seen at the affected side and H-I at the unaffected side at baseline. Again, splint therapy did not make significant change.…”

Section: Discussionmentioning

confidence: 78%

Clinical Study on the Comparison of Masticatory Efficiency and Jaw Movement Before and After Temporomandibular Disorder Treatment

Kümbüloğlu¹,

Saracoglu²,

Bingöl³

et al. 2013

CRANIO®

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In this clinical study, pre-and post-rehabilitation changes in intraborder mandible movements, chewing cycles, masticatory efficiencies, and borders of the chewing area of patients with unilateral muscular disorders (MD) (n = 20) or unilateral disc derangement disorders (DDD) (n = 20) of temporomandibular disorder (TMD) were observed and compared with healthy individuals with full dentition (n = 20) (48 female, 12 male; mean age: 28). The MD patients received stabilization splints and the DDD patients, anterior positioning splints for six weeks. Symptoms, such as muscle pain, TMJ pain, headache, chewing difficulty, and maximum mouth opening, showed significant improvements after splint therapy for both MD (p = 0.000) and DDD (p = 0.000) patients, but lateral excursion and protrusion were not significantly changed (p > 0.05). Chewing efficacy and chewing cycles improved significantly (p < 0.05) in both the MD (p < 0.05) and DDD (p < 0.05) groups, but only the MD group was comparable to the control group after treatment. Pre-and post-rehabilitation chewing cycles along the frontal plane on both sides in the MD group were similar to the control group. Considering the majority of the improvements in the diagnostic measures, patients with MD and DDD may benefit from occlusal splint therapy. ABSTRACT:In this clinical study, pre-and post-rehabilitation changes in intraborder mandible movements, chewing cycles, masticatory efficiencies and borders of chewing area of patients with unilateral muscular disorders (MD) (n=20), unilateral disc derangement disorders (DDD) (n=20) of temporomandibular disorder (TMD) were observed and compared with healthy individuals with full dentition (n=20) (48 female, 12 male; mean age: 28). MD patients received stabilization splints and DDD patients anterior positioning splints for a duration of 6 weeks. Symptoms such as muscle pain, TMJ pain, headache, chewing difficulty, maximum mouth opening showed significant improvements after splint therapy for both MD (p=0.000) and DDD (p=0.000) patients but lateral excursion and protrusion were not significantly changed (p>0.05). Chewing efficacy and chewing cycles improved significantly (p<0.05) in both MD (p<0.05) and DDD (p<0.05) groups but only MD group was comparable to control group after treatment. Pre-and post-rehabilitation chewing cycles along frontal plane on both sides of MD group were similar to control group. Considering the majority of the improvements in the diagnostic measures, patients with MD and DDD may benefit from occlusal splint therapy.4

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Section: Discussionmentioning

confidence: 78%

Clinical Study on the Comparison of Masticatory Efficiency and Jaw Movement Before and After Temporomandibular Disorder Treatment

Kümbüloğlu¹,

Saracoglu²,

Bingöl³

et al. 2013

CRANIO®

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“…On the other hand, previous investigations have reported sex differences in univariate measures of masticatory patterns (Neill and Howell, 1986;Howell, 1987). These studies found that vertical gape, maximum anterior jaw excursion, and maximum lateral jaw excursions during chewing were greater in men, and that women chewed more slowly than men.…”

Section: Discussionmentioning

confidence: 97%

“…Previous studies reported that gum reduces the level of sex specificity in mastication (Neill and Howell, 1986;Howell, 1987). It will be important to repeat the current study's methods on a new subject sample and to use foodstuffs of different consistencies.…”

Section: Discussionmentioning

confidence: 98%

“…It will be important to repeat the current study's methods on a new subject sample and to use foodstuffs of different consistencies. This will serve two purposes: (1) to determine whether the current study's discriminant functions (Table 4) will consistently distinguish males from females regardless of foodstuffs, and (2) to determine whether previously reported, univariate sex-specific distinctions (Neill and Howell, 1986;Howell, 1987) will emerge as a result of the use of non-gum food items.…”

Section: Discussionmentioning

confidence: 99%

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Evidence of Sex-specific Differences in Masticatory Jaw Movement Patterns

Gerstner

Parekh

1997

J Dent Res

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Abstract. The complexity of human oral functional movements has not been studied in detail quantitatively, and only recently have studies begun to evaluate whether such movements contain sex-specific characteristics. Therefore, the purposes of this study were: (1) to quantify in detail the jaw movements and associated masticatory electromyographic activity occurring during gum chewing, and (2) to explore these data for evidence of sex specificity. Fourteen male and 17 female subjects participated in the study. Approximately 11 right-and 11 left-sided chewing cycles and associated masticatory electromyographic activity were sampled from each subject. The samples were quantified into 165 variables per chewing cycle, averaged to create a single multivariate vector for each subject, and then analyzed by a step-wise discriminant analysis. With a combination of 6 variables, a jackknifed cross-validation test found the probability of correct classification to be 93.5%. These findings support the hypothesis that masticatory jaw movements contain sex-specific features.

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“…However, transoral devices can easily interfere with lip movements and thus the recorded mandibular movements. 22,31,32 Therefore, some authors used markers on an optical frame to replace the upper transoral device without having to attach markers directly to the skin. However, while no relative movement will occur between markers on the optical frame, the markers may move together with the frame relative to the underlying bone.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of soft-tissue artifacts when using anatomical and technical markers to measure mandibular motion

Chen

et al. 2011

Journal of Dental Sciences

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Background/purpose: Skin marker-based systems are used to accurately measure the three-dimensional motion of the temporomandibular joint. Since skin markers move relative to the underlying bone during jaw movements, the measured temporomandibular joint kinematics is subject to soft-tissue artifacts. A complete evaluation of soft-tissue artifacts for markers on the facial anatomical landmarks and on an optical frame during jaw opening/closing movements is not available. The purpose of this study was to further our knowledge using a commercial opto-electronic movement tracking system to measure marker movements, that were then compared to true values defined by a transoral rigid device attached to the incisors. Materials and methods: Twenty healthy subjects performed jaw opening/closing movements at a self-selected pace while the 3D trajectories of 17 facial skin markers, three markers on an optical frame, and 4 markers on a transoral device were measured using a six-camera opto-electronic motion tracking system. Movements of the skin and optical frame markers relative to the head coordinate system defined by the transoral device (gold standard) were calculated. The movements of the head coordinate systems defined using different groups of skin markers relative to the gold standard were also analyzed. Results: The results showed that nose-bridge markers had minimal displacements but the middle-and side-face markers had large displacements.Conclusions: It appears that markers on the frontal nose bridge are good alternatives to transoral rigid devices for measuring mandibular motion, compared to optical frame

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Computerized kinesiography in the study of mastication in dentate subjects

Cited by 50 publications

References 11 publications

Clinical Study on the Comparison of Masticatory Efficiency and Jaw Movement Before and After Temporomandibular Disorder Treatment

Clinical Study on the Comparison of Masticatory Efficiency and Jaw Movement Before and After Temporomandibular Disorder Treatment

Evidence of Sex-specific Differences in Masticatory Jaw Movement Patterns

Evaluation of soft-tissue artifacts when using anatomical and technical markers to measure mandibular motion

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