Evaluation of a New Measuring System for Occlusal Force with Pressure Sensitive Sheet.

Suzuki, Tetsuya; Watanabe, Tokuhiro; Yoshitomi, Nobuyuki; Ishinabe, Satoshi; Kumagai, Hiroshi; Uchida, Tatsuro; Minakuchi, Shunsuke; Sekita, Toshiaki; Kobayashi, Kenichi; Nagao, Masanori

doi:10.2186/jjps.38.966

Cited by 28 publications

(22 citation statements)

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“…The system is not affected by intraoral temperature or humidity, nor is it affected by the velocity or duration of pressure. 19 Moreover, its performance is not dependent on the proficiency of the examiner, and it is simple to use for objective evaluation of occlusal function. 12 In a previous study, occlusal contact area and force were reported to be greater in male patients than in female patients.…”

Section: Discussionmentioning

confidence: 99%

Changes in occlusal function after extraction of premolars: 2-year follow-up

Yoon

Hwang

Chung

et al. 2017

The Angle Orthodontist

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Objective: To determine the effects of extraction and the number of teeth extracted on changes in occlusal function by measuring occlusal contact area and force before and after orthodontic treatment with a fixed appliance. Materials and Methods: Female patients treated with a fixed appliance were divided into nonextraction (n ¼ 36), two maxillary premolar extraction (n ¼ 31), and four premolar extraction (n ¼ 18) groups. Bite pressure-sensitive films were used to analyze the occlusal contact area and force. Measurements were performed before treatment (Pre-Tx), immediately afterward (After-Tx), and 2 years later (2Y After-Tx). The data were analyzed using a linear mixed model and the post hoc Bonferroni test. Results: The occlusal contact area and force after treatment decreased significantly compared with Pre-Tx values but were increased 2 years later in all groups. There were no significant differences in occlusal contact area or force during the entire observation period among the three groups (P . .05). The occlusal contact area and force in the nonextraction and two maxillary premolar extraction groups recovered to Pre-Tx levels 2 years later (P . .05). The occlusal contact area in the four premolar extraction group was significantly lower than the Pre-Tx level after 2 years of retention (P , .05). Conclusions: The occlusal contact area and force showed a tendency to decrease immediately after treatment and then gradually increase to pretreatment levels during the observation period. However, the occlusal contact area did not recover fully after 2 years in the four premolar extraction group. (Angle Orthod. 2017;87:703-708.)

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Section: Discussionmentioning

confidence: 99%

Changes in occlusal function after extraction of premolars: 2-year follow-up

Yoon

Hwang

Chung

et al. 2017

The Angle Orthodontist

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“…The sheet is unaffected by temperature change, 22 and the velocity and duration of the force applied to it have a negligible influence. 23 For all study models, the upper and lower side cuts, heel cuts, and baselines were exactly on the same plane in centric occlusion. For OCA measurements, the casts were mounted in a centric occlusion adjustable articulator.…”

Section: Methodsmentioning

confidence: 99%

Changes in Occlusal Contact Area during Oral Appliance Therapy Assessed on Study Models

Ueda

Almeida

Lowe

et al. 2008

The Angle Orthodontist

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Objective: To test the hypothesis that long-term use of an oral appliance (OA) does not cause changes in the occlusal contact area (OCA). Materials and Methods: Baseline and follow-up treatment study models were obtained for 45 patients with obstructive sleep apnea who had been using an OA for 4 or more days/week for more than 5 years. Study models in centric occlusion, with an inserted pressure-sensitive sheet, were loaded in compression. An image scanner was used to evaluate OCA. Results: A significant change in total OCA was identified in 39 patients (86.7%): a decrease in 26 (66.7%) and an increase in 13 (33.3%) patients. Regional changes Ͼ5% were observed in Ͼ90% of patients in each of the three regions. In the molar and premolar regions, 24 (53.3%) and 27 (60.0%) of the patients showed an OCA decrease, while only 16 (35.6%) and 15 (33.3%) showed an increase. Conversely, for the anterior region, more increases (24 patients-53.3%) than decreases were identified. Conclusion: The hypothesis is rejected. Long-term OA therapy resulted in dramatic changes of occlusion, suggesting that monitoring of occlusal changes is required.

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“…It has been reported that OcFr in maximum intercuspation can be recorded repeatedly with little error using a similar methodology (Matsui et al ., 1996; Hassan et al ., 1997). The film is unaffected by intraoral humidity and temperature (Noguchi et al ., 1983) and the velocity and duration of the forces applied to it have negligible influences on colour formation (Suzuki et al ., 1994).…”

Section: Methodsmentioning

confidence: 99%

Changes in occlusal force and occlusal contact area after active orthodontic treatment: a pilot study using pressure‐sensitive sheets

Sultana

Yamada

Hanada

2002

J of Oral Rehabilitation

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The aim of this study was to investigate functional changes in occlusion during retention. Data on occlusal force (OcFr) and occlusal contact area (OcAr) was obtained using the pressure-sensitive sheet, from a treated group (20 female patients) who had had four premolar extractions and treatment with standard edgewise appliances, and a control sample who matched the treated group of retainer for sex, age and Angle classification at 1 year after removal. A repeated measures analysis of variance showed that the mean values of total OcFr and OcAr in the treatment group gradually increased during retention and were 669.3 N and 15.1 mm2, respectively, at 1 year after removal of retainer. The increases of OcFr and OcAr were larger in the molar region, especially at the second molar. At 1 year after removal of retainer, OcFr and OcAr in the second molar were significantly larger in the treatment group than in the control sample, and a similar distribution pattern of OcFr and OcAr to those in normal occlusion was seen. These results suggested that balanced OcFr and OcAr might be obtained during and after retention, due to the settling of molars that had been discluded by active orthodontic treatment.

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Evaluation of a New Measuring System for Occlusal Force with Pressure Sensitive Sheet.

Cited by 28 publications

References 0 publications

Changes in occlusal function after extraction of premolars: 2-year follow-up

Changes in occlusal function after extraction of premolars: 2-year follow-up

Changes in Occlusal Contact Area during Oral Appliance Therapy Assessed on Study Models

Changes in occlusal force and occlusal contact area after active orthodontic treatment: a pilot study using pressure‐sensitive sheets

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