Effect of denture adhesives on masticatory performance: Multicenter randomized controlled trial.

Purpose: The purpose of this study is to investigate the effects of denture adhesives on masticatory performance via a 10-center, parallel, randomized, controlled trial of complete denture wearers in Japan.

Methods: The trial was conducted between September 2013 and October 2016. The inclusion criteria were complete edentulism, willingness to undergo new complete denture treatment, and willingness to return for recall treatment.

Multivariate analysis reveals oral health-related quality of life of complete denture wearers with denture adhesives: a multicenter randomized controlled trial.

Purpose To investigate the difference in improvement of oral health-related quality of life (OHR-QoL) depending on the oral and denture conditions of a complete denture wearer when using a cream or powder type denture adhesive in a 10-center parallel randomized clinical trial.Methods Two hundred edentulous subjects who wore complete dentures were allocated to each of the three groups according to denture adhesive type: cream, powder, and control (saline solution). The materials were applied to the mucosal surface of the dentures for 4 days, and baseline data and data after the intervention were collected.

Effect of denture adhesives on oral moisture: A multicenter randomized controlled trial.

Purpose: The purpose of this study was to investigate the effect of denture adhesives on oral moisture in a 10-center parallel randomized clinical trial.

Methods: Two hundred edentulous subjects wearing complete dentures were allocated into three groups: cream-type adhesive, powder-type adhesive and control groups. The adhesives (and saline solution in the control group) were applied to the mucosal surface of the dentures for 4 days, and baseline data and data after the intervention for eight meals over 4 days were obtained.

Influence of Occlusal Force on Electroencephalograms in Edentulous Patients.

Purpose: This study explored the effect of improved occlusal force resulting from complete denture treatment on electroencephalogram (EEG) findings to determine if such an outcome is a factor contributing to activation of synaptic/neuronal dysfunction in the brain.

Materials And Methods: Twenty-three individuals with complete upper and lower dentures who visited the Department of Removable Prosthodontics at Tsurumi University Dental Hospital were included in this study. The Dental Prescale Occluzer FPD-705 system was used to perform an objective measurement of occlusal force before and after denture treatment.

Investigation of trends and characteristics in patients with obstructive sleep apnea.

Background: Oral appliance (OA) therapy for obstructive sleep apnea (OSA) has only been part of Japan's National Health care coverage plan since 2004. Subsequently, not enough time has passed to establish the medical trends and characteristics of OSA patients in Japanese Dental Hospitals.

Aim: The aim of this study was to investigate the medical trends and the characteristics in patients with OSA who visited our clinic, and to compare our findings with previous studies.

Implant overdenture using Konus telescope on one-piece implant: a case report.

An implant-retained Konus (tapered double crown) telescopic complete overdenture was fabricated for a mandibular edentulous patient. The Konus telescopic overdenture coping crowns and framework assembly were cast with commercially pure (CP) titanium, joined using laser welding and placed on four one-piece implants. Sufficient retention and stability were obtained using this method.

Survey on use of titanium dentures in Tsurumi University Dental Hospital for 11 years.

Purpose: The purpose of this study was to survey the production of titanium dentures in Tsurumi University Dental Hospital and to study the actual use of titanium dentures in our university.

Methods: The survey was based on the metal base dentures produced at Tsurumi University Dental Hospital during an 11-year period between April 1995 and March 2006, with relation to the types of metals used in the dentures, types of dentures, dental condition, and the number of artificial teeth.

Results: 1871 metal base dentures were produced in the study period.

Effect of implant support on distal-extension removable partial dentures: in vivo assessment.

Purpose: The use of a limited number of implants for support of a removable partial denture (RPD) changes a Kennedy Class I or II situation to that of a Class III. This in vivo pilot study evaluated implant-supported distal-extension removable partial dentures (RPD) in 5 partially edentulous patients.

Materials And Methods: Two implants (Brånemark TU MK III, Nobel Biocare) were placed in a mandibular Kennedy Class I arch.

A new retainer using magnetic attachment.

Patient: A 58-year-old man with a complaint of masticatory disturbance presented. His mandibular left premolars and molars were missing, and the mandibular left canine, which was neighboring to the missing part, showed marked labial tipping. A cobalt-chromium removable partial denture was fabricated using a new magnetic attachment retainer because it seemed difficult to apply a conventional clasp for this case.

Comparison of occlusal condition and prevalence of bone change in the condyle of patients with and without temporomandibular disorders.

Objective: The purpose of this study was to compare the differences in dental and occlusal conditions, and prevalence of bone change in the condyle, between a group of patients with temporomandibular disorders (TMD) and a group of dental patients without such complaints.

Study Design: A group of 504 patients with temporomandibular disorders (TMD patients) and a group of 970 patients without such complaints (dental patients), all 25 years of age or older, were compared using the criteria of age, sex, dental and occlusal condition, and prevalence of bone change in the condyle based on panoramic radiographs and imaging request forms.

Results: In both groups, the rate of complete dental arch was high for both jaws.

Retentive force of O-ring attachment to use Immediate Provisional Implant (IPI)-retained overdenture.

This study evaluated the retentive force of the O-ring attachment to an Immediate Provisional Implant (IPI)-retained overdenture. Two sizes of O-rings (#1, #2) were placed on the IPI abutment head. As the controls, soft relining material, silicone lining material, and the PMMA resin were used to connect the IPI abutment head.

In vitro wear resistance of three types of composite resin denture teeth.

Statement Of Problem: The wear resistance of artificial teeth is important to the life of the removable prosthesis for the edentulous patient. The ability of artificial teeth to maintain a stable occlusal relationship over time may be influenced by this property.

Purpose: The purpose of this in vitro study was to evaluate the wear resistance of artificial teeth based on composite resin filler content when opposed by a denture tooth antagonist.

Effect of surface reaction layer on grindability of cast titanium alloys.

Objective: The purpose of this study was to investigate the effect of the cast surface reaction layer on the grindability of titanium alloys, including free-machining titanium alloy (DT2F), and to compare the results with the grindability of two dental casting alloys (gold and Co-Cr).

Methods: All titanium specimens (pure Ti, Ti-6Al-4V and DT2F) were cast using a centrifugal casting machine in magnesia-based investment molds. Two specimen sizes were used to cast the titanium metals so that the larger castings would be the same size as the smaller gold and Co-Cr alloy specimens after removal of the surface reaction layer (alpha-case).

[A clinical study on the feeling of oral dryness in denture wearers. Part 2. Measurement of the height of the salivary moisture area].

Purpose: We surveyed youths and denture wearers to evaluate the feeling of oral dryness.

Materials And Methods: The survey was performed in 100 denture wearers (mean age, 66.2+/-8.

[A clinical study on the feeling of oral dryness in denture wearers. Part 1. Results of a questionnaire survey].

Purpose: We surveyed youths and denture wearers to evaluate the feeling of oral dryness. In the denture wearers group, we evaluated the association between dentures and feeling of oral dryness.

Materials And Methods: The survey was performed in 100 denture wearers (mean age, 66.

Titanium removable partial denture clasp repair using laser welding: a clinical report.

This clinical report describes repair of a fractured removable partial denture clasp using laser welding rather than a conventional torch soldering technique.

A technique for making a diagnostic and surgical template.

Implant-supported restorations can restore function and esthetics provided that the implants are placed in the predetermined location and properly angulated. This article describes the fabrication of a diagnostic template incorporating a silicone radiopaque marker as a guide for achieving 3-dimensional evaluation of bone without artifacts using computed tomography. The diagnostic template may be easily transformed into a surgical template by removing the silicone marker.

Application of thermography in dentistry--visualization of temperature distribution on oral tissues.

The purpose of this study was to devise and propose appropriate conditions for the photographing of thermal images in the oral cavity and to evaluate which thermography techniques can be applied to dentistry by evaluating the differences in temperature among oral tissues. Thermal images of oral cavities of 20 volunteers in normal oral condition were taken according to the guidelines of the Japanese Society of Thermography, with five added items for oral observation. The use of a mirror made it possible to take thermal images of the posterior portion or palate.

O-ring attachments for transitional implant-retained overdentures.

The lack of proper stability and retention is frequently found in mandibular complete dentures. The stability and retention of existing complete dentures may be improved by using transitional implants (TIs) incorporating the O-ring retention system. This article describes the procedures used to convert an existing conventional complete denture to a TI-retained complete overdenture with O-ring.

A sectional stock tray system for making impressions.

This article describes a sectional stock tray system developed by the authors for making preliminary impressions. It may be used not only for individual dental arches but also for patients with microstomia or constricted oral openings. This system allows many combinations of right and left tray sizes and forms to be assembled into a well-fitted anatomically-conforming tray in spite of individual anatomic discrepancies.

Application of cast iron-platinum keeper to a collapsible denture for a patient with constricted oral opening: a clinical report.

Insertion of a denture is especially difficult for patents with a constricted oral opening. This report describes the fabrication of a collapsible removable partial denture with a cast iron-platinum attachment for a partially edentulous woman with a constricted oral opening resulting from rheumatoid arthritis and a craniotomy for a subarachnoid hemorrhage.

In vitro wear assessment of titanium alloy teeth.

Purpose: Wear of commercially pure (CP) titanium prosthetic teeth has frequently been observed. The greatest wear has been found when the same grades of CP titanium are used for both maxillary and mandibular teeth. This study examined the wear behavior of teeth made with cast titanium alloy and compared these results with those for CP titanium and gold alloy teeth.