CALCIUM PHOSPHATE GRAFTS COMBINED WITH GUIDED TISSUE REGENERATION IN THE TREATMENT OF PERIODONTAL BONY DEFECTS- A SYSTEMATIC REVIEW AND META-ANALYSIS.

Background: The objective of this systematic review is to assess the clinical outcomes of intrabony and furcation defects treated using a regenerative approach with calcium phosphate (CP) grafts combined plus guided tissue regeneration (GTR) membrane in comparison to open flap debridement (OFD).

Method: A review protocol was created under PRISMA checklist to find randomized clinical trials (RCTs) in English that compared CPs plus GTR with OFD in humans with intrabony and/or furcation defects. Both electronic and manual searches were conducted.

Effect of a novel rotation coordinating device on registered horizontal condylar guidance of nonarcon semi-adjustable articulators.

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: The study was designed as a comparative investigation.

Lithium metasilicate glass-ceramic fabrication using spark plasma sintering.

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.

Materials And Methods: In this study, SPS for the first time was used to fabricate primary lithium metasilicate glass-ceramic (LMGC) blocks.

Clinical performance of implant supported mandibular overdentures with cantilever bar and stud attachments: A retrospective study.

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 clinical performance of mandibular implant-supported over-dentures with different attachment systems.

Marginal Accuracy of Lithium Disilicate Full-Coverage Single Crowns Made by Direct and Indirect Digital or Conventional Workflows: A Systematic Review and Meta-Analysis.

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-supported lithium disilicate restorations.

How the initial retentive force of implant-supported overdentures can be affected with splinted and unsplinted attachments systems.

Background: The aim of this study was to evaluate the retention of implant-supported overdentures with different attachment systems.

Materials And Methods: In this 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, Hader bar with 1 and 3 plastic clips, ball on bar with 2 and 4 plastic caps, Locator, Rhein plastic caps and Eleptical matrix).

Comparison of translucency and opalescence among different dental monolithic ceramics.

Statement Of Problem: Monolithic ceramic restorations designed by computer-aided design and computer-aided manufacturing are increasingly being used by clinicians. With the introduction of new materials, their optical characteristics also need to be investigated.

Purpose: The purpose of this in vitro study was to compare the translucency and opalescence of lithium disilicate, zirconia-reinforced lithium silicate, presintered zirconia-reinforced lithium silicate, polymer-infiltrated ceramic-network material, and multilayer zirconia.

Five year clinical outcomes of metal ceramic and zirconia-based implant-supported dental prostheses: A retrospective study.

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) restorations were made for 114 patients with a mean age of 59 ± 8.

Marginal adaptation of zirconia complete-coverage fixed dental restorations made from digital scans or conventional impressions: A systematic review and meta-analysis.

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 conventional impressions.

Biodegradable Magnesium Bone Implants Coated with a Novel Bioceramic Nanocomposite.

Magnesium (Mg) alloys are being investigated as a biodegradable metallic biomaterial because of their mechanical property profile, which is similar to the human bone. However, implants based on Mg alloys are corroded quickly in the body before the bone fracture is fully healed. Therefore, we aimed to reduce the corrosion rate of Mg using a double protective layer.

Effect of repeated firing on the translucency of CAD-CAM monolithic glass-ceramics.

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) lithium disilicate (LDS) and zirconia-reinforced lithium silicate (ZLS) glass-ceramics of 0.6 and 1 mm thickness during crystallization, correction, and glaze firing cycles.

The effect of the nano- bioglass reinforcement on magnesium based composite.

Nano-bioceramic particles serving as a reinforcement can improve the mechanical and biological properties of magnesium implants, but they might have some side effects, that must be addressed. In this research, magnesium composites including 10 wt% nano-bioglass (nBG) were fabricated using powder metallurgy (PM10) and spark plasma sintering (SPS10) methods for bone reconstruction purposes. The results of the compression test indicated that the SPS10 sample had higher mechanical properties, in comparison to the PM10 sample, and nBG had more reinforcing effect on the mechanical properties of magnesium matrix.

Improvement of in vitro behavior of an Mg alloy using a nanostructured composite bioceramic coating.

Magnesium (Mg) alloys as a new group of biodegradable metal implants are being extensively investigated as a promising selection for biomaterials applications due to their apt mechanical and biological performance. However, as a foremost drawback of Mg alloys, the high degradation in body fluid prevents its clinical applications. In this work, a bioceramic composite coating is developed composed of diopside, bredigite, and fluoridated hydroxyapatite on the AZ91 Mg alloy in order to moderate the degradation rate, while improving its bioactivity, cell compatibility, and mechanical integrity.

Five year clinical outcomes and survival of chairside CAD/CAM ceramic laminate veneers - a retrospective study.

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 restorations were made using CEREC AC Bluecam with Empress CAD and emax CAD blocks.

Prevention of Cross-contamination Risk by Disinfection of Irreversible Hydrocolloid Impression Materials with Ozonated Water.

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 preventing cross-contamination.

Effect of cleaning methods on retentive values of saliva-contaminated implant-supported zirconia copings.

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 evaluation of prepared microgroove pattern by femtosecond laser on alumina-zirconia nano-composite for endosseous dental implant application.

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 this study was to design microgroove patterns by femtosecond laser on A-Y-TZP20 nano-composite disks for endosseous dental implant application.

Relationship between Tooth Loss, Functional Dyspepsia and Gastro-Esophageal Reflux Disorder among Isfahani Adults.

Background: Few studies have assessed the relationship between tooth loss and upper gastro-intestinal (GI) disorders including functional dyspepsia (FD) and gastro-esophageal reflux disease (GERD). This study aimed to investigate the relation between dental status and FD, its components and GERD among a large group of Isfahani adults.

Methods: In a cross-sectional study from April to May 2010, the dental status of 4109 Isfahani adults was evaluated using a self-administered questionnaire.

Comparison of Marginal and Internal Adaptation of CAD/CAM and Conventional Cement Retained Implant-Supported Single Crowns.

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 maxillary cast. Four types of implant-supported single restorations were fabricated on the abutment (n = 10): e.

Effect of the processing cycle on dimensional changes of heat-polymerized denture base resins.

Background: 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.

Materials And Methods: A metal edentulous maxillary arch was used for making 40 stone casts.

Clinical performance of CEREC AC Bluecam conservative ceramic restorations after five years--A retrospective study.

Objectives: 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.

Methods: 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.

Recording the Tilt of a Cast on a Surveyor.

Some patients are not satisfied with removable partial dentures (RPDs), when it is not stable during mastication.A dental surveyor can be used to prevent problems related to production of RPDs. Determining the best path of insertion and removal is an initial and fundamental step in RDPs planning.

Clinical outcomes of zirconia-based implant- and tooth-supported single crowns.

Objectives: 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.

Materials And Methods: In this retrospective study, 261 patients with 556 single crowns supported by either teeth (324) or implants (232) were examined during 3- to 7-year follow-up (mean observation of 60.