
Farahnaz NejatidaneshIsfahan University of Medical Sciences · School of Dentistry
Farahnaz Nejatidanesh
Dr. Professor
About
51
Publications
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Introduction
Farahnaz Nejatidanesh currently works at the School of Dentistry, Isfahan University of Medical Sciences. Farahnaz does research in Dentistry, Implantology and Prosthodontics. Their current project is 'Five year clinical outcomes and survival of chairside CAD/CAM ceramic laminate veneers- A retrospective study'.
Additional affiliations
September 1989 - present
Publications
Publications (51)
Background
This study aimed to evaluate the effect of new computer-aided design/computer-aided manufacturing all-ceramic materials on the viability and adhesion properties of human gingival fibroblasts (HGFs).
Materials and Methods
In this experimental study, the proliferation and adhesion potential of the cells were evaluated by seeding the HGF c...
Background
Horizontal condylar guidance (HCG) is registered by protrusive interocclusal records but in nonarcon articulators, these records can affect the accuracy. The present study aimed to evaluate the effect of a novel rotation coordinating device (RCD) on condylar guidance setting with protrusive interocclusal records.
Materials and Methods
T...
Background:
The digital dentistry, requires materials with wo opposite properties of machining ability and also enough hardness. The main objective of this experimental study was to investigate the fabrication feasibility of the lithium metasilicate glass-ceramic in partially crystalized stated using the spark plasma sintering (SPS) method.
Mater...
Background:
Treatment of edentulous patients with implant-supported over-dentures improves denture's retention and stability. Published data concerning implant-supported overdenture with cantilever bars that claimed that can affect the survival and bone loss of implants are scarce.
Purpose:
The purpose of this study was to evaluate 5-year clinic...
Initial lithium silicate glass frits with different SiO2/Li2O ratio were prepared by the melting method. In this study, the obtained glass frits were hot-pressed at different temperatures of 550, 650 and 750°C; however, only samples sintered at 750°C were sintered and densified. The properties of the obtained lithium metasilicate glass ceramics (LM...
Periodontitis is a common inflammatory disease in dentistry that may lead to tooth loss and esthetic problems. Periodontal tissue has a sophisticated architecture including four sections of alveolar bone, cementum, gingiva, and periodontal ligament fiber; all these four can be damaged during periodontitis. Thus, for whole periodontal regeneration,...
In this study different heat treatment temperatures have been applied for titanium implant after surface modification through chemical treatment by Hydrogen Peroxide (H2O2). X-ray diffraction (XRD) analysis revealed that the main phase at the surface of heat-treated sample at temperatures below than 650 °C is Anatase, moreover, the presence of Anat...
Purpose:
Several studies have compared digital intraoral scanners and conventional impressions. The accuracy of these two methods in terms of marginal accuracy of lithium disilicate crowns is not well-established, yet. The purpose of this study was to systematically review available publications on marginal fit of single-unit, full-coverage, tooth...
Background: The aim of this study was to evaluate the retention of implant-supported overdentures with different attachment systems.
Materials and Methods: In this in vitro study edentulous model with 2 Straumann implant in symphyseal region was used to make an overdenture with different attachment systems. (Dolder bar with 1 and 3 metal clips, Had...
Anatase Rutile Apatite forming ability a b s t r a c t Hydrogen peroxide treatment is a cost-effective and simple method to improve the bioac-tivity of titanium implants. In this study, the effects of chloride ion concentration and temperature of hydrogen peroxide on the surface treatment of titanium were investigated using X-ray diffractometry (XR...
Objectives
The implant-supported restorations can be made of all-ceramic materials. The purpose of this study was to compare five year clinical outcomes of zirconia-based and metal ceramic implant-supported fixed dental prostheses (FDPs)
Methods
In this study, 114 posterior implant-supported FDPs including zirconia-based (52) or metal ceramic (62)...
Statement of problem
Intraoral scanners have been increasingly used in recent years. However, the accuracy of digital scans as it affects marginal adaptation is unclear.
Purpose
The purpose of this systematic review and meta-analysis was to compare the marginal adaptation of single-unit zirconia crowns fabricated with digital scans or with convent...
Statement of problem:
The effects of multiple firings on the translucency of newly introduced computer-aided design and computer-aided manufacturing (CAD-CAM) glass-ceramics have not been well evaluated.
Purpose:
The purpose of this in vitro study was to assess the changes in the translucency of high-translucency (HT) and low-translucency (LT) l...
Nano-ceramic particles can serve as reinforcing agents for metallic materials to improve their mechanical properties. However, it is important to ensure chemical compatibility between the matrix and particles. In the present study, magnesium composites with and without nano-hydroxyapatite (nHA) particles were fabricated for bone reconstruction appl...
Titanium is a highly reactive metal and its high-temperature processing has to be done at a high-vacuum atmosphere. In this research, porous titanium scaffolds were fabricated using the space holder method for dental reconstruction purposes. Accordingly, the samples were sintered in two different vacuum furnaces at the vacuum level of 0.013 Pa, inc...
Purpose:
The aim of this clinical study was to compare the survival, modified California Dental Association (CDA) criteria, and periodontal parameters of laminate veneers made with Empress CAD and emax CAD over 60 months.
Methods:
One hundred and ninety seven ceramic laminate veneers were placed in 71 patients in a private practice. The restorat...
Background
Disinfection of dental impression is mandatory for preventing the cross infection between dental staff and dental laboratory. Ozone as a disinfectant can be used in various ways in dentistry. The aim of this study was to evaluate the efficacy of ozonated water for disinfection of irreversible hydrocolloid impression materials and prevent...
Introduction: Zirconia bioceramic can be considered for metallic replacement in dental implant applications. A proper method of surface modification may promote better osseointegration. Methods: In study evaluated viability of fibroblast cell following surface treatment. Therefore, viability L929 cells were characterized using MTT assay and scannin...
Objective
The aim of this study was to evaluate the effect of different cleaning regimens on retentive strength of saliva‐contaminated implant‐supported zirconia copings.
Material and Methods
Seventy solid titanium abutments with 5.5 mm height (Straumann) were attached to the regular neck implant analogs (Straumann). The abutment‐analog complex wa...
Ceramic dental materials, especially alumina (20 %vol)-yttrium stabilized tetragonal zirconia poly crystal (A-Y-TZP20), have been considered as alternatives to metals for endosseous dental implant application. For increasing the bone-to-implant contact as well as the speed of bone formation, a new surface modification can be effective. The aim of t...
Ceramic dental materials have been considered as alternatives to metals for dental implants application. In this respect, zirconia tetragonal stabilized with %3 yttrium, is of great importance among the ceramic materials for endosseous dental implant application. Because of its good mechanical properties and color similar to tooth. The aim and nove...
Purpose:
To evaluate the accuracy of marginal and internal adaptation of 2 computer-aided design/computer-aided manufacturing (CAD/CAM) and 2 conventionally made cement retained implant-supported restorations.
Materials and methods:
An abutment and its corresponding fixture analog (Astra Tech) were inserted in left central incisor area of a maxi...
The aim of this study was to assess the clinical performance of CAD/CAM partial coverage posterior restorations made by CEREC AC Bluecam system after 5 years.
159 ceramic partial coverage posterior restorations were placed in 109 patients in a private practice. The restorations were made using CEREC AC Bluecam with CEREC Blocs or Empress CAD blocks...
The second processing cycle for adding the artificial teeth to heat-polymerized acrylic resin denture bases may result in dimensional changes of the denture bases. The aim of this study was to evaluate the dimensional changes of the heat-polymerized acrylic resin denture bases with one and two-cycle processing methods.
A metal edentulous maxillary...
Zirconia-based restorations have been increasingly used on implant and teeth abutments, but the evidence about clinical outcomes of these restorations is limited. The aim of this study was to assess up to 7-year clinical outcomes of implant- and tooth-supported zirconia-based single crowns.
In this retrospective study, 261 patients with 556 single...
To evaluate the effect of surface treatments on retention of implant-supported restorations over short abutments.
One hundred twenty metal copings were made on Straumann solid abutments (3 mm length). The copings were divided into 2 groups: control and air abraded (50 μm Al2O3). The copings were luted using Fleck's, Poly F, Panavia F, and Fuji Plus...
This article describes a new, precise, and simple method for making an impression with an individual tray for a patient with microstomia. In this method, a Pindex system on the handle of the tray was used for attaching two parts of the sectional tray.
The retention of cement-retained implant-supported restorations can be affected by the height of the abutments.
The purpose of this study was to evaluate the effects of the surface treatment on the retention of implant-supported zirconia restorations over short abutments.
Eighty solid abutments reduced to 3 mm in height and their corresponding fixt...
The purpose of this study was to evaluate the effect of chemical disinfectants on flexural strength of denture base acrylic resins. A total of 176 rectangular specimens (65x10x3 mm) were made from four heat-polymerized acrylic resins (Triplex,QC-20, Meliodent and Acropars) (n=44). The specimens were thermal cycled for 5000 cycles 5-55 degrees C and...
Dental practice presents opportunities for cross-contamination. The dentist's face is at high-risk of infection transmission. The purpose of this study was to evaluate the risk of contamination in different areas of dentist's face during dental practices.
The visible splashes of materials that accumulated on cellulose face shields during 144 prosth...
The interim restorative materials should have certain mechanical properties to withstand in oral cavity. The aim of this study was to evaluate the hardness and wear resistance of interim restorative materials.
Fifteen identical rectangular shape specimens with dimensions of 2 mm × 10 mm × 30 mm were made from 7 interim materials (TempSpan, Protemp...
With regard to potential retrievability of cement-retained implant restorations, the retentive strength of the luting agents is critical. The aim of this study was to evaluate the retention values of implant-supported metal copings using different luting agents.
Twenty ITI implant analogs and solid abutments of 5.5-mm height were embedded verticall...
The platform switching (PLS) concept was introduced in the literature in 2005. The biological benefits and clinical effectiveness of the PLS technique have been established by several studies. In this article different aspects of PLS concept are discussed. Crestal bone loss, biologic width, and stress distribution in this concept are comprehensivel...
The aim of this study was to evaluate the retention value of implant-supported zirconium oxide ceramic copings using different luting agents.
Twenty ITI solid abutments of 5.5 mm height and ITI implant analogs were mounted vertically into autopolymerizing acrylic resin blocks. Ninety zirconium oxide copings (Cercon, Degudent) with a loop on the occ...
Abstract AbstractThe degree of retention for overdenture attachments depends on design, location, and alignment of supporting dental implants and the type of attachments. The aim of this study was to evaluate the retention of implant-supported overdenture with different attachment designs.An overdenture was made on an edentulous mandibular model wi...
The aim of this study was to evaluate two-body wear of five indirect composites and compare them with enamel. Signum, belleGlass HP, SR Adoro, Dialog, GC Gradia and enamel were formed into cylinders (n = 10). Two-body abrasive wear rates were determined using a porcelain disk and a pin on disk apparatus. The height and weight loss of the specimens...
Implant dentistry provides unique and predictable methods for the replacement of missing teeth. The need for provisionalization of implant-supported prostheses is increasing. Interim denture is a prosthesis designed to enhance esthetic, provide stability and function for a limited of time and should be replaced by definitive prosthesis after a peri...
A method for fabrication of record bases which is used in implant dentistry has been described. This method is cost effective because it does not need extra equipment for making the maxillomandibular relations. This technique involves the application of plastic sprues that fit on the top of implants to hold the record bases and allows for easy reco...
Flexural strength of interim materials is of particular concern with long-span fixed partial dentures (FPDs) or in areas of heavy contact. The purpose of this study was to compare the flexural strength of seven resins used to fabricate interim fixed prostheses.
Ten identical 25 x 2 x 2 mm specimens were made from seven interim materials (N = 70) (T...
Fracture is a common cause of acrylic resin denture failure due to crack development in a site of excessive concentration of stress in the denture. The purpose of this study was to evaluate the effect of labial frenum notch size and palatal depth on stress concentration in maxillary complete dentures.
Three-dimensional finite element models of maxi...
Implant dentistry provides unique and predictable methods for the replacement of missing teeth. The need for provisionalization of implant-supported prostheses is increasing. Interim denture is a prosthesis designed to enhance esthetic, provide stability and function for a limited of time and should be replaced by definitive prosthesis after a peri...
Despite the broad use of occlusal splints in the treatment of temporomandibular disorders, the efficacy of splints is a source of controversy. In this study, the effectiveness of occlusal splints on the electromyographic activity of the masseter and temporal muscles in healthy individuals was investigated.
An occlusal splint was made for 25 healthy...
One of the most important requirements for interim restorations is good marginal adaptation. Polymerization shrinkage of interim restorative materials can jeopardize the marginal integrity of interim restorations.
The purpose of this study was to compare the marginal accuracy of interim restorations made with 4 interim materials.
A direct technique...
Statement of Problem: Element release from dental casting alloys into the oral environment is of clinical concern and is considered to be a potential health problem to all patients. Purpose: The aim of this study was to investigate the metallic ion release of four base metal alloys. Materials and Methods: Two Ni-Cr (Minalux and Supercast) and two C...
J Prosthet Dent 2003;89:419.