Abstract Objective To identify the influence of prosthetic features through a comprehensive analysis with other known risk factors. Materials and methods A total 169 patients ( n = implants: 349) was retrospectively included in present study. Peri‐implantitis diagnosed based on peri‐implant bone loss probing depth. Using radiographs taken 1 5 years following prosthesis insertion, were determined: marginal (MBL), emergence angle (EA), profile (EP) crown/implant ratio (CIR). The splinted...

Finite element analyses were performed for various shapes of dental implant to study effects on stress distribution generated in the surrounding jaw bone and determine an optimal thread shape even distribution. It was found that square filleted with a small radius more effective than other implants used analyses. Additional obtained from previous varying design parameters, such as width end height load directions, dimensions implant. Stress case when 0·5 p 0·46 , respectively, where is screw...

The purpose of the study was to investigate influence 3D printing parameters on fit and internal gap printed resin dental prosthesis. model simulated fabricated for three-unit prostheses with two implants. One hundred were two-layer thicknesses five build orientations using a (NextDent C&B; systems, Soesterberg, Netherlands) ten manufactured milling as control. seated scanned micro-CT (computerized tomography). Internal volume (IGV) calculated from reconstructed data. IGV, marginal fit,...

The clinical application of 3D-printed provisional restorations is increasing due to expansion intraoral scanners, easy dental computer-aided design (CAD) software, and improved 3D printing speed. This study compared flexural strength three-unit fixed prostheses with that conventionally fabricated milled restorations. A metal jig two abutments pontic space an indenter for measurement were fabricated. prosthesis was designed manufactured using three additive manufacturing technologies,...

Previous studies on accuracy of three-dimensional (3D) printed model focused full arch measurements at few points. The aim this study was to examine the dimensional 3D-printed models which were teeth-prepped for three-unit fixed prostheses, especially margin and proximal contact areas. prepped dental scanned with a desktop scanner. Using reference file, test fabricated by digital light processing (DLP), Multi-Jet printing (MJP), stereo-lithography apparatus (SLA) techniques. We calculated...

Abstract The purpose of this study was to define the surface properties prepared titanium (Ti) disks, which served as a model system, and contrast biologic response MG63 cells exposed Ti disks with different levels roughness. interact each other, resulting in change other qualities addition roughness due roughening procedure. machined were roughened by sandblasting electric glow discharging. specimens inspected through comprehensive analysis. cell behaviors compared along number, alkaline...

summary In this study, effects of different overdenture attachments on the stress distributions in maxillary bone surrounding implants are studied. Four types attachment considered. They rigid Dalbo Stud, movable Stress Broken, Dalro, and O‐ring attachments. Three‐dimensional finite element analysis was conducted with commercial package to obtain bone. Varying angle inclination load, portions compact trabecular were monitored separately. The by assuming two boundary conditions at interface...

In this study we investigated not only osteoblastic cell proliferation and differentiation on the surface of calcium metaphosphate (CMP) matrices in vitro but also bone formation by ectopic implantation these cell–matrix constructs athymic mice vivo. Interconnected porous CMP with pores 200 μm size were prepared to use as scaffolds for rat-marrow stromal-cell attachment. Cell–matrix cultured vitro, ALPase activities monitored 56 days. addition their being implanted into subcutaneous sites...

With an aim to mimic natural extracellular matrix, we fabricated the nano- and microfibrous matrix with chitosan by electrospinning nanofibers onto predefined mesh for effective chondrocytes cultivation. Rolling double-layered nano-/microfibrous membranes produced three-dimensional (3-D) scaffolds that exhibited interconnected open pore structure in their scanning electron microscopy images. In vitro chondrocyte culture experiment showed this 3-D provided a significantly greater...

This study investigated the influence of bone quality and surgical technique on implant stability quotient (ISQ) value.In addition, interfacial quality, directly surrounding fixture, resonance frequency structure was also evaluated by finite element analysis.MATERIALS AND METHODS.Two different types (type 1 type 2) were extracted trimmed from pig rib bone.In each bone, same implants installed in three ways: (1) Compaction, (2) Self-tapping, (3) Tapping.The ISQ value measured analyzed to...

Laser sintered technology has been introduced for clinical use and can be utilized more widely, accompanied by the digitalization of dentistry development direct oral scanning devices. This study was performed with aim comparing marginal accuracy internal fit Co-Cr alloy copings fabricated casting, CAD/CAM (Computer-aided design/Computer-assisted manufacture) milled, 3-D laser techniques. A total 36 crown-copings were from an implant abutment. The evaluated measuring weight silicone...

Cobalt–chromium (Co-Cr) metal is one of the widely used biomaterials in fabrication dental prosthesis. The purpose this study was to investigate whether there are differences properties metals and bond strength with ceramics depending on manufacturing methods Co-Cr alloy. alloy specimens were prepared three different ways: casting, milling, selective laser melting (SLM). mechanical (elastic modulus, yield strength, flexural strength) alloys investigated by flexure method three-point bending...

Summary Acrylic‐based denture materials have several common weak points, such as shrinkage after curing, lack of strength and toxicity. In order to solve these problems, we adapted a hybrid system using acrylic polymer polyhedraloligosilsesquioxane (POSS). The aim the study was investigate biocompatibility reinforced acrylic‐based composite resin with POSS. Specimens novel polymeric base resin, in which POSS used partially replace commonly monomer, were fabricated. examine changes time,...

The oxide layer that covers a titanium surface is extremely stable and appears to have excellent biocompatibility, which can result in successful osseointegration. aim of this study was analyse the characteristics an formed by anodic oxidation (anodization), evaluate extent bone healing around anodized implant. screw-type implants were made commercially pure (Grade 2). Group 1 samples had turned surface, three other types experimental specimens under constant voltages 190 V (Group 2), 230 3)...

Summary This study was designed to radiographically evaluate the effect of surface macro‐and microstructures within coronal portion external hex implant at marginal bone change after loading. The fifty‐four patients included in were randomly assigned treatment groups with rough‐surface implants (TiUnite, n = 45), a hybrid smooth and rough (Restore, 45) or microthreads (Hexplant, 45). Clinical radiographic examinations conducted time loading (baseline) 1‐year post‐loading. A three‐level...

Summary The aim of this study was to determine whether resonance frequency analysis can be integrated into the routine clinical evaluation initial healing dental implants. In addition, designed verify there a correlation between implant stability quotient (ISQ) values, maximum insertion torque angular momentum and energy, evaluate importance different factors in determination ISQ values at insertion. Two designs 81 implants 41 patients were evaluated using values. Maximum obtained during...

Summary The aim of this study was to evaluate the change marginal bone level radiographically around three different implant systems after 3 years in function. Fifty-four patients were included and randomly assigned treatment groups rough-surface implants (TiUnite, n = 37), hybrid smooth (Restore, 38) rough surface with microthread (Hexplant, 45). Clinical radiographic examinations conducted at time loading (baseline), 1 loading. A three-level mixed-effect analysis covariance (ancova) used...

Efficient osseointegration is a key factor in dental implants to reduce the total time-course of therapy. Titanium with anodized surface gained much interest for their enhanced osseointegration. Anodized implant combined bioactive drugs an ideal candidate enhance bone regeneration. Previously delivery from metal has been attempted by utilizing polymeric dip-coating method. However, entire coating polymer can diminish advantageous roughness and cause contact inhibition between surface. In...