Influence of filler on bite impression material in transillumination method for occlusal examination

Kihara, Takeshi; Shigeta, Yuko; Hirabayashi, Rio; Ikawa, Tomoko; Ando, Eriko; Hirai, Shinya; Nikawa, Hiroki; Ogawa, Takumi

doi:10.4012/dmj.2012-165

Cited by 4 publications

(3 citation statements)

References 14 publications

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“…Although articulating paper has been most commonly used, its marks would be affected by its width, and the salivary impregnation can diffuse the paper ink, leading to false positives 34–36 . Transillumination of silicon bite registration can overcome the problems of articulating paper, but the result depends much on the orientation of the light resource and would be affected by the filler in the bite registration material 37, 38 .…”

Section: Discussionmentioning

confidence: 99%

Occlusion and Disocclusion Time Changes in Single Unit Crowns Designed by Functional Generated Path Technique: A Randomised Clinical Trial

Lin

Jiao²,

Zhao

et al. 2017

Sci Rep

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Although it is believed that implementation of the functional generated path (FGP) technique can facilitate occlusal surface design for restorations, it has not been objectively compared in situ with the conventional fabrication yet. Therefore, in the present study, a single-blind crossover clinical trial was conducted using T-scan to compare changes in occlusion time (OT) and disocclusion time (DT) of single posterior artificial crowns designed differently using FGP technique (FGP), average-value FGP technique (AVR) and conventional fabrication (CON). Each of the 10 participants took part in the study tried three artificial crowns in different sequences according to a computer generated randomization list. The results objectively revealed that changes in OT and DT were significantly smaller for FGP than CON (P < 0.05) and considerably smaller for AVR than CON, respectively. The subjective feedback and the occlusal adjusting time were better and shorter for FGP and AVR than CON (P < 0.05). No harm to the participants occurred. Overall, FGP is an efficient technique showing more physiological harmonious relationship with the articulating system.

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Section: Discussionmentioning

confidence: 99%

Occlusion and Disocclusion Time Changes in Single Unit Crowns Designed by Functional Generated Path Technique: A Randomised Clinical Trial

Lin

Jiao²,

Zhao

et al. 2017

Sci Rep

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“…The occlusal records were located on a film viewer and recorded using a digital camera. The images of the occlusal records were analyzed using the silicone black technique 13) . Occlusal condition in molar regions was evaluated by the following three parameters, which were defined by the interocclusal distance: number of contacts, 0− 50 μm thickness; tight contact areas: 0−50 μm thickness; and intermediate contact areas: 50−100 μm thickness.…”

Section: Occlusal Contactsmentioning

confidence: 99%

Influence of occlusal conditions on masticatory efficiency in dentulous adults − A pilot study −

Katsumura

Kihara

Ando

et al. 2021

Nihon gaku koukukinou gakkai zasshi

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Purpose: To establish ideal occlusal contacts for fixed prostheses, the relationship between masticatory efficiency and occlusal contacts in dentulous adults should be investigated using suitable experimental foods. In this study, masticatory efficiency, especially fragmentation ability at the early stage of mastication, in healthy adults was evaluated using dried raisins that deform before fragmentating it at an early stage of mastication. In addition, the influence of occlusal conditions on masticatory efficiency was investigated. Material and Methods:The subjects were 16 healthy volunteers (men: 11, women: 5), and their ages ranged between 25 and 61 years (mean ± standard deviation: 38.8 ± 10.50 years). The subject's habitual masticatory side was determined by observing the translation of a raisin from the center of the tongue dorsum. The testing food was dried raisins, which can withstand high strain before crack propagation, and subsequently fragmentation begins. The number of chews, when fragmentation of raisin was observed, was recorded as a fragmentation ability index. The images of the occlusal records in intercuspal position were analyzed using the silicone black technique. Occlusal condition in molar regions was evaluated by the following three parameters, which were defined by the interocclusal distance: number of contacts, 0-50 μm thickness; tight contact areas: 0-50 μm thickness; and intermediate contact areas: 50-100 μm thickness. The points of inquiry were as follows: 1. fragmentation ability index, 2. number of contacts, 3. tight contact area, and 4. intermediate contact area. The data were analyzed with a Spearman's test.Result: There was a negative correlation between the fragmentation ability index and contact areas: tight contact areas: r=−.433, p=.013 and intermediate contact areas: r=−.608, p=.000. In addition, the fragmentation ability index was negatively correlated with the number of contacts (r=−.481, p=.005). Conclusion:The results of this study indicate that our method has the potential to evaluate masticatory efficiency in dentulous adults.

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“…"From this method, it is possible to preserve occlusal records and compare their findings through observation. In our previous studies, we created a threshold curve to accurately detect the occlusal contact area on a digital photograph 10) , and investigated the influence of filler on bite impression material via the transillumination method 11) .…”

Section: ．Introductionmentioning

confidence: 99%

The problem of the conventional transillumination method explained and a proposed solution

Hirabayashi

Shigeta

Ando

et al. 2014

JJSCAS

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In this report, reflected light which is a problem in the conventional transillumination method is explained, and a solution is proposed. The purpose of this report was to investigate the characteristics of transmitted and reflected light on the image of the recorded bite impression material, and to propose a method for distinguishing between the reflected light area and the occlusal contact area. Gray scale values in the transmitted and the reflected light areas were evaluated through the conventional transillumination method. The reflected light could not be distinguished from the contact area. From this result, it was revealed that the reflected light interfered with the observation of the occlusal contact via the conventional method. From the results of having evaluated RGB values in the transmitted and the reflected light areas, it was considered that the color difference between transmitted light and reflected light was useful to separate the transmitted and reflected light. Due to the adjustment of the offset and the gamma correction values, the reflected light could be distinguished from the occlusal contact area. It was considered that this method was helpful for accurately detecting the occlusal contact area on a digital photograph.

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Influence of filler on bite impression material in transillumination method for occlusal examination

Cited by 4 publications

References 14 publications

Occlusion and Disocclusion Time Changes in Single Unit Crowns Designed by Functional Generated Path Technique: A Randomised Clinical Trial

Occlusion and Disocclusion Time Changes in Single Unit Crowns Designed by Functional Generated Path Technique: A Randomised Clinical Trial

Influence of occlusal conditions on masticatory efficiency in dentulous adults − A pilot study −

The problem of the conventional transillumination method explained and a proposed solution

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