Examination of facial measurement on the image using a noncontact three-dimensional measurement device.

Background: Producing dentures for edentulous patients is important to improve quality of life of elderly. The determination of the occlusal vertical dimension on producing dentures is one of the key factors for using the dentures comfortably. The purpose of this study is to consider the usefulness of the determination of the occlusal vertical dimension of a facial measurement method applied on scanned facial image using a noncontact three-dimensional measurement device.

Basic research to propose a new design of laminated mouthguard-Effect of lamination order on thickness.

Background/aim: Mouthguard thickness influences the protection ability from orofacial trauma. The aim of this study was to propose a new design for mouthguards and to evaluate the effect of the lamination order on the thicknesses of mouthguards.

Materials And Methods: Mouthguard sheets of 2.

Appropriate fabrication method for pressure-formed mouthguards using polyolefin sheets.

Background/aim: Polyolefin sheet mouthguards are usually formed in the same manner as ethylene-vinyl acetate sheet mouthguards. However, the heating condition of the polyolefin sheet for the pressure-forming process has not been determined. The aim of this study was to examine the appropriate heating condition for polyolefin sheet mouthguards when fabricated with the pressure-formed technique.

Fabrication of vacuum-formed and pressure-formed mouthguards using polyolefin sheet.

Background: Mouthguard should be worn to decrease orofacial trauma. Custom-made mouthguards are usually fabricated using ethylene vinyl acetate sheet or polyolefin sheet. However, the difference of the characteristics of the mouthguard formed by polyolefin sheet has not been cleared enough.

Relationships between the upper central incisor crown forms and degree of labial inclination, overbite, and overjet in Japanese young adults.

Purpose: The present study aimed to investigate the relationships between the crown form of the upper central incisor and their labial inclination, overbite, and overjet.

Materials And Methods: Maxillary and mandibular casts of 169 healthy dentitions were subjected to 3D dental scanning, and analyzed using CAD software. The crown forms were divided into tapered, square, and ovoid based on the mesiodistal dimensions at 20% of the crown height to that at 40%.

Difference in laminated mouthguard thickness according to the laminate order.

Background/aim: Mouthguard thickness should be maintained to prevent oral trauma by protecting the teeth and the surrounding soft tissue. The aim of this study was to examine the difference in laminated mouthguard thickness according to the laminate order.

Materials And Methods: The mouthguard sheets used in this study were 2.

Protein Ingredient in Saliva on Oral Dryness Patients Caused by Calcium Blocker.

Oral dryness as a side effect of certain drugs is increasing. The aim of this study was to examine the change of the protein ingredient in saliva of oral dryness patients caused by calcium blocker. Six patients taking calcium blocker and six healthy elderly were enrolled.

Salivary secretion and salivary stress hormone level changes induced by tongue rotation exercise.

Purpose: Prevention of xerostomia and stress is important to prolong healthy life expectancy and improve the quality of life. We aimed to investigate the effects of tongue rotation exercise for increasing salivary secretions and stabilizing salivary stress hormone levels.

Materials And Methods: Twenty four participants without subjective oral dryness were enrolled.

Effectiveness of oral moisturizing gel and flavor on oral moisture and saliva volume: A clinical study.

Statement Of Problem: Oral dryness leads to problems in the oral cavity and pharynx and problems with dental prostheses. Although some moisturizing agents relieve the symptoms of oral dryness, the influence of the flavor of the moisturizing agent on the symptoms of oral dryness has not been clarified.

Purpose: The purpose of this clinical study was to examine the effectiveness of moisturizing gels with different flavors.

Measurement of Oral Moisture on Oral Dryness Patients.

Many elderly patients have oral dryness; thus, it is necessary to evaluate the oral moisture in a clinical setting. The aim of this study was to clarify the importance of controlling the measuring pressure of the oral moisture-checking device. The influence of the measuring pressure of the oral moisture-checking device was examined using agar under 10 measuring pressure conditions (Kruskal-Wallis test).

Appropriate fabrication method for vacuum-formed mouthguards using polyolefin sheets.

Background/aims: The appropriate heating conditions for polyolefin sheets have not yet been determined and polyolefin sheets are usually formed in the same manner as ethylene vinyl acetate sheets. The aim of this study was to examine the appropriate heating conditions for polyolefin sheets when fabricating vacuum-formed mouthguards.

Materials And Methods: Mouthguard sheets of 3.

Difference in pressure-formed mouthguard thickness according to the laminate procedure.

Aim: Mouthguard thickness influences the preventive effects against dental and oral injury. The aim of this study was to examine the difference in pressure-formed mouthguard thickness according to the laminate procedure used.

Materials And Methods: The materials used were mouthguard sheets of 2.

Vacuum-formed mouthguard fabrication to obtain proper fit using notched sheet.

Background/aim: Mouthguards should be provided with appropriate thickness and proper fit to exert their effects. However, mouthguard thickness becomes thinner after forming. The aim of this study was to examine the effect of using a notched mouthguard sheet and forming as the heated surface of the sheet contacts the surface of the working model.

Mouthguard sheet temperature after heating under pressure former.

Background/aim: Ethylene vinyl acetate and polyolefin sheets have been used commonly for fabricating mouthguards. However, the change of the sheet temperature during heating of the polyolefin has not been clarified. The aim of this study was to examine the effects of changing the sheet temperature during heating, and to examine whether there were any differences between the sheet materials.

Mouthguard sheet temperature after heating.

Background/aim: Mouthguard sheet materials such as ethylene vinyl acetate and polyolefin have been used commonly. However, the change of the sheet temperature during heating of the polyolefin has not been determined. The aim of this study was to examine the change of the sheet temperature during heating and to examine the vacuum-formed mouthguard characteristics for the sheet materials.

Appropriate fabrication method for pressure-formed mouthguards using ethylene vinyl acetate sheets.

Background/aims: Fabrication of mouthguards should be performed properly. However, the appropriate heating temperature for fabricating a pressure-formed mouthguard has not been determined. The aim of this study was to examine the influence of the heating temperature on the fabrication of a pressure-formed mouthguard.

Pressure-forming method using a single-mouthguard sheet.

Background/aim: Mouthguard thickness is important for the prevention of orofacial trauma during sports. However, it is difficult to maintain the necessary thickness after forming the mouthguard. The aim of this study was to evaluate a pressure-forming method using a single-mouthguard sheet.

Formation of vacuum-formed and pressure-formed mouthguards.

Background/aim: The method used to form mouthguards should be carefully selected in order to obtain their full preventive benefits. The aim of this study was to examine the differences of mouthguard characteristics according to the forming methods.

Materials And Methods: Mouthguard sheets of 3.

Influence of working model angle on the formation of a pressure-formed mouthguard.

Background/aim: Custom-made mouthguards are fabricated on working models. However, the influence of the working model to the mouthguard characteristics has not been clearly established. The aim of this study was to examine the influence of the angle of the working model on the formation of a pressure-formed mouthguard.

Appropriate fabrication method for vacuum-formed mouthguards.

Aim: The aim was to examine the influence of the heating temperature on the fabrication of vacuum-formed mouthguards.

Materials And Methods: Mouthguard sheets of 3.8 mm ethylene vinyl acetate were vacuum-formed on working models at three heating temperatures: 80, 100, and 120°C.

Evaluation of reliability of perioral muscle pressure measurements using a newly developed device with a lip piece.

Purpose: We examined the reliability of measurements using a newly developed perioral muscle pressure measuring device with a lip piece in healthy adults.

Methods: Subjects were 40 healthy men (25.8 years) with normal stomatognathic function.

Influence of working model position on the formation of a pressure-formed mouthguard.

Aim: The aim of this study was to examine the influence of the position of the working model on the formation of a pressure-formed mouthguard.

Materials And Methods: Mouthguard sheets of 3.8 mm ethylene vinyl acetate were pressure-formed on working models in three positions: anterior, central, and posterior.

Shape change in mouthguard sheets during thermoforming.

Background: The purpose of this study was to identify changes in sheet shape during thermoforming and the effect of the model position in the molding machine on fabricated mouthguard thickness.

Materials And Methods: Ethylene vinyl acetate mouthguard sheets (3.8 mm thick) were used that had cross-stripes (10 × 10 mm), and the anteroposterior and bilateral lengths were used for measurements.