This study investigated the effect of amount thickness reduction on color and translucency dental monolithic zirconia ceramics. One-hundred sixty-five specimens (16.3 mm × 16.3 2.0 mm) were divided into 5 groups (Group I to V) according number A2-coloring liquid applications. Each group was then 11 subgroups by reducing up 1.0 in 0.1-mm increments (Subgroup 0 10, n=3). Colors spectral distributions measured CIELAB a reflection spectrophotometer. All measurements performed five different...

This study evaluated the effect of several airborne-particle abrasion protocols on surface characteristics monolithic zirconia and protocol choice shear bond strength resin cement. 375 bar-shaped (45×4×3 mm3) 500 disk-shaped (Ø9×1 mm2) specimens were divided into 25 groups. All abraded with one three different sizes alumina particles (25, 50 or 125 μm), two pressures (2 4 bar), distinct application times (10 20 s) incidence angles (45° 90°). The used for 3-point bending test; Weibull...

The objective of this study was to evaluate the influence various cement types on stress distribution in monolithic zirconia crowns under maximum bite force using finite element analysis. models prepared #46 crown (deep chamfer margin) were scanned and solid composed crown, layer, tooth produced computer-aided design technology subsequently translated into 3-dimensional models. Four according different (zinc phosphate, polycarboxylate, glass ionomer, resin). A load 700 N applied vertically...

This study assessed the changes in mechanical and surface properties of transition zone multilayered translucent monolithic zirconia subjected to long-term hydrothermal aging. A total 360 disk-shaped specimens (diameter: 15.0 mm; thickness: 1.2 mm) were prepared using conventional (3Y-TZP LT; ZL, 4Y-TZP MT; ZM) (5Y-TZP MT Multi; ZT, 3Y/5Y-TZP Prime; ZP) among IPS e.max ZirCAD blocks. Specimens divided into three groups (n = 30) aged autoclave at 134 °C under 0.2 MPa for 0 h (control group),...

The purpose of this study was to evaluate various core designs on stress distribution within zirconia crowns.MATERIALS AND METHODS.Three-dimensional finite element models, representing mandibular molars, comprising a prepared tooth, cement layer, core, and veneer porcelain were designed by computer software.The shoulder (1 mm in width) variations incremental increases 1 mm, 2 3 proximal lingual height, buccal height respectively.To simulate masticatory force, loads 280 N applied from three...

This study tried to find the most significant factors predicting implant prognosis using machine learning methods.MATERIALS AND METHODS.The data used in this was based on a systematic search of chart files at Seoul National University Bundang Hospital for one year.In period, oral and maxillofacial surgeons inserted 667 implants 198 patients after consultation with prosthodontist.The traditional statistical methods were inappropriate study, which analyzed small sample size factor affecting...

Limited information is available on the optimal cement thickness of monolithic zirconia crowns. This study was designed to evaluate stress distribution in posterior crowns with different thicknesses under masticatory force and maximum bite using three-dimensional finite element analysis. The prepared unprepared mandibular right first molar models were scanned exported computer-aided design system. Solid crowns, which cemented teeth generated. Four fabricated applying (100 µm, 200 400 600...

Abstract Objectives: This study compared the implant stability and clinical outcomes obtained with two types of non‐submerged dental implants that have different thread designs surface treatments. Materials methods: A randomized trial 1 year follow‐up was performed on 56 participants 75 (control group, 36 in 28 subjects; experimental 39 subjects). The group received Osstem SSII Implant system; control Standard Straumann ® Dental System. diameter length fixture were uniform at 4.1 mm 10 all...

The purpose of this study was to evaluate the effects coping designs on stress distributions in posterior zirconia crowns by non-linear three-dimensional finite element analysis. Three-dimensional models a mandibular right first molar with layers veneering porcelain, coping, cement, and abutment tooth were designed computer software (HyperWorks 10.0). Ten different produced according various shoulder positions heights. shoulders (1-mm width) exhibited incremental height increases 1 mm, 2 3...

This study evaluated the effect of surface treatments on bond strength repaired temporary resins. One-hundred flat-surfaced cylindrical specimens (Ø 7 mm × 12 mm) each resin (2 bis-acryl resins and 2 polymethyl-methacrylates) were prepared. The randomly divided into 10 groups (n = 10), according to types treatments: untreated, adhesive treated, silanated, silane + hydrofluoric acid etched, laser sandblasted, sandblasting tribochemical silica coating silanated. Each material same brand with...

Implant-supported overdenture is a reliable treatment option for the patients with edentulous mandible when they have difficulty in using complete dentures. Several options been used implant-supported attachments. Among these, bar attachment system has greater retention and better maintainability than others. SFI-Bar® prefabricated can be adjustable at chairside. Therefore, laboratory procedures such as soldering welding are unnecessary, which leads to fewer errors lower costs. A 67-year-old...

This study was designed to evaluate the effects of different coping designs on fracture modes posterior zirconia crowns. One hundred mandibular molar copings ten were fabricated from 3Y-TZP. All groups (n=10) had 1 mm wide shoulder, but they varying heights mm, 2 or 3 buccal, lingual and proximal sides. After being sintered veneered, crowns titanium abutments stored in distilled water at 37 °C for 24 h. Then loaded into a universal testing machine. The veneer load bulk values measured....

ABSTRACT Objectives This study evaluated the impact of masticatory difficulty on development and progression malnutrition, frailty, sarcopenia, disability in community‐dwelling adults, using data from Korean Frailty Aging Cohort Study. Methods Participants were categorised by presence difficulty. The Fried frailty phenotype, mini‐nutritional assessments, diagnostic criteria proposed Asian Working Group Sarcopenia adopted to diagnose sarcopenia respectively. Physical disabilities measured...

The osseointegration of titanium implants has been examined over the past 50 years. Many implant systems have introduced and become popular to dentistry. designs connection between fixture abutment are divided into external vs internal connection. From beginning, Braanemark system was characterized by an hexagon. Internal developed reduce stress transferred bone. These differences may impact on clinical procedures protocols, laboratory components costs, incidence complications. Therefore,...

The purpose of this study was to investigate the diametral tensile strength polymer-based temporary crown and fixed partial denture (FPD) materials, change with time.One monomethacrylate-based FPD material (Trim) three dimethacrylate-based ones (Protemp 3 Garant, Temphase, Luxtemp) were investigated. 20 specimens (ø 4 mm × 6 mm) fabricated randomly divided into two groups (Group I: Immediately, Group II: 1 hour) according measurement time after completion mixing. Universal Testing Machine...

The purpose of this study was to investigate the curriculum geriatric dentistry for undergraduates in Korean dental schools.For development purposes, it necessary compare education programmes South Korea United States and Europe.The most recent related information on at undergraduate level all 11 schools were collected by both official letter e-mail. A symposium gathering expert opinions improve also held. data analysed, summarised.Six had a didactic course as compulsory three elective....

Patients who underwent resection of maxilla due to benign or malignant tumor, accident will have defect in palatal area. They get retention, support and stability from remaining tissues which are hardly optimal. The advantage swing-lock attachment design is having multiple contacts on labial lingual side the abutment teeth by retentive strut bracing component. Because force distributed equally teeth, poor prognosis can be benefited it. It also more advantageous cover soft tissue defects hard...

cc 2014 The Korean Academy of Prosthodontics This is an Open Access article distributed under the terms Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided original work properly cited. *Corresponding Author: Sung-Hun Kim Department Dental Research Institute, School Dentistry, Seoul National University, 275-1, Yeongeon-dong, Jongno-gu, Seoul,...