Thickness of Mouthguard Sheet Material after Vacuum Forming Process Depending on the Thickness of Mouthguard Sheet

Self Cite

Section: Methodsmentioning

confidence: 99%

“…A laser pointer was fixed to a three-dimensional coordinate measuring machine (192-201; Mitutoyo Co., Kanagawa, Japan) and used to measure the sagging distance (8)(9)(10)(11)(12)(13)(14)(15)(16). A separating medium was applied (at varnish TF; Shofu Inc.) to the model in preparation for pressure molding.…”

Section: Methodsmentioning

confidence: 99%

Shape change in mouthguard sheets during thermoforming – part 2: effect of the anteroposterior position of the model on mouthguard thickness

Takahashi

Araie²,

Satoh

et al. 2017

Self Cite

“…[13][14][15][16][17] Forming machines have either a single-sided or double sided heating mechanism. Factors that affect shape change during this stage include the heater shape, molding machine heat source 15,22 and the sheet thickness, [23][24][25][26] color, 16,27 and material. 15,[17][18][19] The temperature was constantly higher on the heated surface than on the non-heated surface.…”

Section: Discussionmentioning

confidence: 99%

“…16,[23][24][25][26][27] Sheets of the same material will vary somewhat depending on the manufacturer due to differences in the content ratios of the ingredients. 16,[23][24][25][26][27] Sheets of the same material will vary somewhat depending on the manufacturer due to differences in the content ratios of the ingredients.…”

Section: Discussionmentioning

confidence: 99%

Influence of continuous use of a vacuum‐forming machine for mouthguard thickness after thermoforming

Takahashi

Araie²,

Satoh

et al. 2017

Self Cite

“…Regarding the vacuum thermoforming procedure, a sagged sheet distance of 20 mm from the original position was used referring to the report of Takahashi et al. . So the heating time was set 75 s. A vacuumed sheet was removed after 30‐min cooling time.…”

Section: Methodsmentioning

confidence: 99%

Thinning factors influence on custom‐made mouthguards thermoforming

Kojima

Takeda

Nakajima

et al. 2014

The aim of the present study was to clarify and quantify factors on thinning during a thermoforming using a special simulation model that has three different flat surfaces of 0 degree, 45 degree, and 90 degree against a pressurizing force. Air pressure type samples were made by EVA and acrylic resin blank. Vacuum type samples were also made by EVA. Thickness Gauge was employed to measure the thickness. As results, pressure forming showed significantly larger thinning at 45 and 90 degree surfaces and smaller thinning at 0degree surface, 36 % in thinning rate by vacuum forming and 66% by the pressure forming at 90 degree surface, and 17 and 20 % at 45 degree surface, and 11 and 2% at 0 degree surfaces. Thinning rate of each surface at each heating time was significantly increased with an inclination against the pressure become steep. Promoted thinning by an increase in heating time on 0 degree surface, however, the reverse results of the thinning were restrained with an increase in heating time on 45 and 90 degree surface significantly were obtained. Thinning was increased with the increase in distance from the center in 0 degree surface and increased with the decrease in height in the vertical surface significantly. The air pressure, the material thickness in EVA (Drufosoft), difference in material color did not affect thinning rate. An acrylic resin material showed approximately 10% smaller thinning than EVA (Drufosoft).To retain enough thickness of 3 mm on 90 degree surface corresponding an incisal labial aspects for pressure laminate type, over 55 % reduction is taken into consideration, at least two 3-mm thickness materials should be laminated. On 0 degree surface showed at most 2 % reduction, occlusal thickness becomes almost 6 mm, careful occlusal adjustment to achieve 2 mm thickness should be requested.