Application of a Jaw Motion Tracking Device That Measures Six Degrees of Freedom Using Optoelectronics

Ogawa, Takumi; Shigeta, Yuko; Ando, Eriko; Hirai, Shinya; Suma, Mayumi; Hirabayashi, Rio; Ikawa, Tomoko; Hosoda, Yutaka; Araki, Jirou; Itoh, Kousuke; Kamei, Shu; Fukushima, Shunji; Moriyama, Takeshi; Saito, Iori; Kumeda, Harunobu

doi:10.2186/jjps.50.210

Cited by 4 publications

(4 citation statements)

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“…). These graphic images were exported to the IMAGE TOOL software () , and values of the parameters assessed were obtained for each sequence. A mean value was calculated for each parameter considering both sequences.…”

Section: Methodsmentioning

confidence: 99%

Effect of complete and partial removable dentures on chewing movements

Gonçalves

Vilanova

Gonçalves

et al. 2013

J of Oral Rehabilitation

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Partial or complete edentulism impairs mastication. However, it is unclear how the chewing cycle is affected by prosthetics. We evaluated the chewing movements of patients fitted with complete (CD) or removable partial denture (RPD). A total of 29 subjects were kinesiographically evaluated during chewing of peanuts and Optocal portions in a random sequence. The subjects were divided into two groups according to prosthesis type. Group RPD was composed of 14 partially edentulous patients using a lower distal extension RPD (mean age 61 ± 8 years), and group CD contained 15 completely edentulous patients using CD (mean age 65·9 ± 7·9 years) in both jaws. Opening, closing, occlusal and masticatory cycle times, movement angle (opening and closing), maximum velocity (opening and closing), total area and chewing cycle amplitudes were evaluated. The results were subjected to anova and Tukey's HSD test at a significance level of 5%. The RPD group exhibited shorter opening and closing phases and masticatory cycle time (P < 0·05). Maximum velocities were also higher in the RPD group, irrespective of the test material (P < 0·05). The area and amplitude of the chewing envelope was smaller in the CD group (P < 0·0001). The test material did not influence chewing cycles in any of the parameters evaluated (P > 0·05). RPD wearers use a faster chewing sequence with greater vertical and lateral jaw excursions compared with CD wearers.

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Section: Methodsmentioning

confidence: 99%

Effect of complete and partial removable dentures on chewing movements

Gonçalves

Vilanova

Gonçalves

et al. 2013

J of Oral Rehabilitation

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“…The root mean square (RMS) errors in measurement of position and jaw motion were 0.2 mm and 0.1-0.8 mm, respectively. 17 A pair of metal clutches was attached to the labial surfaces of upper and lower incisors to position the sensors. A rapid cure adhesive agent (Plaster Lock, Morita Inc., Tokyo, Japan) was used to fix the clutches.…”

Section: Measurement Of the Mandibular Movementmentioning

confidence: 99%

Influence of changing the chewing region on mandibular movement

Hashii¹,

Tomida²,

Yamashita³

2009

Australian Dental Journal

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Background: In the shortened dental arch condition, little is known of how patients adapt their jaw function during mastication to the new oral environment. This study aimed to investigate the changes in mandibular movements when the chewing region was changed from the first molar to the first premolar. Methods: Thirty clinical residents with natural dentitions were recruited. The subjects were asked to chew a piece of beef jerky using either the first molar or the first premolar on the preferred chewing side. Three-dimensional trajectories of lower incisors and both condyles were analysed using a jaw movement tracking device with six degrees of freedom during the period between the onset and offset of electromyographic bursts from the masseter and anterior temporal muscles. Results: The closing angle of the lower incisors for first premolar chewing was narrower in comparison with that for first molar chewing (p < 0.05). The lengths of the condylar trajectories and the maximum velocities of the condylar movement for first premolar chewing were smaller and slower, respectively, in comparison with those for first molar chewing (both sides; p < 0.01). Conclusions: The mandibular movement during mastication might be changed to adapt the premolar chewing because of a loss of posterior occlusal supports.

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“…These jaw movement analyzing devices have been applied to dental practice and have contributed to the elucidation of features of various jaw functions. Ogawa et al 20 recently developed a new jaw tracking device to achieve jaw movement analyses with simpler operation and lower cost and examined its potential for clinical applications. The new device is an optical system using position sensitive detector (PSD).…”

Section: Jaw Motion Tracking Devicementioning

confidence: 99%

“…An example of border mandibular movements in frontal plane with two jaw tracking devices 20. (Ogawa et al) …”

mentioning

confidence: 99%

Research Projects on Jaw Function and Occlusion Published in 2006 by Members of the Japan Prosthodontic Society: A Review

Yamaguchi

2007

Prosthodont Res. Pract.

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Application of a Jaw Motion Tracking Device That Measures Six Degrees of Freedom Using Optoelectronics

Abstract: This study showed the possibility of developing clinical applications for this jaw motion device.

Cited by 4 publications

References 0 publications

Effect of complete and partial removable dentures on chewing movements

Effect of complete and partial removable dentures on chewing movements

Influence of changing the chewing region on mandibular movement

Research Projects on Jaw Function and Occlusion Published in 2006 by Members of the Japan Prosthodontic Society: A Review

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