Effect of material type, torque value, and sterilization on linear displacements of a scan body: An in vitro study.

Background: There is limited knowledge on the effect of scan body (SB) material type, torque value, and sterilization on linear displacements of implant SBs.

Purpose: To evaluate the effect of material type, torque value, and sterilization on linear displacements of SBs during screw tightening by using digital image correlation (DIC) analysis.

Materials And Methods: One polyetheretherketone (PEEK, Zfx Intraoral Scan Body) and one titanium SB (Ti, MPS Zimmer Scanbody R1410) were tightened with 5 Ncm torque on two implants (Zimmer TSV ⌀4.

Multifunctional Composite Binder for Thick High-Voltage Cathodes in Lithium-Ion Batteries.

High-voltage LiNiMnO (LNMO) spinel offers high specific energy and good rate capability with relatively low raw-material cost due to cobalt-free and manganese-rich chemical compositions. Also, increasing mass loading (mg/cm) by thickening cathodes has been one of the focused areas to greatly improve the energy density of lithium-ion batteries (LIBs) at the cell level. The LNMO cathode made with a polyvinylidene fluoride (PVdF) binder, however, suffers from an oxidative decomposition of liquid electrolytes and cathode delamination from a current collector.

Load to failure of high-density polymers for implant-supported fixed, cantilevered prostheses with titanium bases.

Purpose: To analyze the load to failure of different CAD/CAM high-density polymers (HDPs) and zirconia when titanium (Ti) bases were included in a cantilevered situation.

Materials And Methods: Five specimens were fabricated from five different CAD/CAM polymethyl methacrylate (PMMA) HDPs (Copratemp [CT]; Tempo-CAD [TC]; TD Dental [TD]; M-PM Disc-Pink [MPM]; M-PM Disc-White [MPMW]), and five specimens were prepared from a 3Y-TZP zirconia (FireZr [FZR]) (control). Ti bases (D Master Dental Implants) were cemented onto the specimens (8 mm [thickness] × 7 mm [width] × 30 mm [length]).

Accuracy of different digital scanning techniques and scan bodies for complete-arch implant-supported prostheses.

Statement Of Problem: The effect of various scan bodies and scanning techniques on the accuracy and scan time for completely edentulous patients is not well understood.

Purpose: The purpose of this in vitro study was to evaluate the effects of 4 scanning techniques and 5 intraoral scan bodies (ISBs) on the trueness, precision, and scan time in a completely edentulous arch with 4 implants.

Material And Methods: Five different ISB systems: AF, NT, DE, C3D, and ZI, and 4 different scanning techniques: unmodified master model (NO), glass fiduciary markers placed on the edentulous ridge (GB), pressure-indicating paste brushed over the ridge and palate (PP), and floss tied between the scan bodies (FL), were evaluated.

Fracture analysis of CAD-CAM high-density polymers used for interim implant-supported fixed, cantilevered prostheses.

Statement Of Problem: The load-to-fracture performance of computer-assisted design and computer-assisted manufacturing (CAD-CAM) high-density polymer (HDP) materials in cantilevers is unknown.

Purpose: The purposes of this in vitro study were to evaluate the load-to-fracture performance of CAD-CAM-fabricated HDPs and to compare that with performance of autopolymerized and injection-molded acrylic resins.

Material And Methods: Specimens from 8 different brands of CAD-CAM HDPs, including Brylic Solid (BS); Brylic Gradient (BG); AnaxCAD Temp EZ (AE); AnaxCAD Temp Plus (AP); Zirkonzahn Temp Basic (Z); GDS Tempo-CAD (GD); Polident (Po); Merz M-PM-Disc (MAT); an autopolymerized acrylic resin, Imident (Conv) and an injection-molded acrylic resin, SR-IvoBase High Impact (Inj) were evaluated for load-to-fracture analysis (n=5).

Displacement comparison of CAD-CAM titanium and zirconia abutments to implants with different conical connections.

Purpose: To compare the displacements of CAD-CAM zirconia and titanium abutments into different internal connection systems after torquing.

Methods: OsseoSpeed EV and OsseoSpeed TX implants (n=10) were placed in resin blocks. Zirconia and titanium abutments (n=5) were first hand tightened and then tightened to the recommended torque (20Ncm for TX and 25Ncm for EV).

A load-to-fracture and strain analysis of monolithic zirconia cantilevered frameworks.

Statement Of Problem: The dimensions of implant-supported fixed cantilevered prostheses are important to prevent mechanical and biological complications. Information on the optimum thickness and cantilever length for improving the strength of zirconia cantilevered frameworks is limited in the literature.

Purpose: The purpose of this in vitro study was to investigate the effect of cantilever length and occlusocervical thickness on the load-to-fracture and strain distribution of zirconia frameworks.

Comparison of 3D displacements of screw-retained zirconia implant crowns into implants with different internal connections with respect to screw tightening.

Statement Of Problem: Internal conical implant-abutment connections without horizontal platforms may lead to crown displacement during screw tightening and torque application. This displacement may affect the proximal contacts and occlusion of the definitive prosthesis.

Purpose: The purpose of this in vitro study was to evaluate the displacement of custom screw-retained zirconia single crowns into a recently introduced internal conical seal implant-abutment connection in 3D during hand and torque driver screw tightening.

Strain analysis of 9 different abutments for cement-retained crowns on an internal hexagonal implant.

Statement Of Problem: Many aftermarket abutments for cement-retained crowns are available for the tapered screw-vent implant. Aftermarket abutments vary widely, from stock to custom abutments and in materials such as zirconia, titanium, or a combination of the two. How these aftermarket abutments perform under occlusal loads with regard to strain distribution is not clear.

Load to failure of different zirconia implant abutments with titanium components.

Statement Of Problem: Abutments with a zirconia superstructure and a titanium insert have recently become popular. Although they have been tested under static load, their performance under simulated mastication is not well known.

Purpose: The purpose of this in vitro study was to compare the cyclic load to failure of 3 types of zirconia abutments with different mechanisms of retention of the zirconia to the titanium interface.

Displacement of Implant Abutments Following Initial and Repeated Torqueing.

Purpose: To measure and compare the three-dimensional (3D) position of nine different abutments manufactured by different manufacturers after repeated torqueing on an internal-hexagon implant.

Materials And Methods: Nine tapered implants were placed into an acrylic resin block. Five specimens each of nine different abutments (n = 45) were placed into one of nine implants.

Three-Dimensional Displacement of Nine Different Abutments for an Implant with an Internal Hexagon Platform.

Purpose: Clinicians need to know whether there are any differences among the many abutment options available for restoring a particular implant. This study aims to compare nine abutments for one implant system for positional changes between hand tightening and torqueing.

Materials And Methods: Nine Tapered Screw-Vent (TSV) implants were placed into a resin block.

Load to failure of different titanium abutments for an internal hexagon implant.

Statement Of Problem: Several aftermarket abutments are available for a commonly used internal hexagonal connection implant. However, their load to failure performance is unknown when compared with the manufacturer's abutment.

Purpose: The purpose of this in vitro study was to conduct a load to failure comparison of 5 different titanium abutments (manufacturer's and aftermarket) for cement-retained restorations used on an implant with an internal hexagon connection.

Load to failure of different zirconia abutments for an internal hexagon implant.

Statement Of Problem: Various zirconia abutment designs are available to restore implant systems. Fracture resistance is one of the criteria involved in selecting among these options.

Purpose: The purpose of this in vitro study was to measure and compare load to failure for 5 zirconia abutments for an internally hexagon implant.

Displacement of screw-retained splinted and nonsplinted restorations into implants with conical internal connections.

Purpose: Variable abutment displacement could potentially affect proximal contacts, incisal edge position, or occlusion of implant-supported prostheses. This study aimed to measure and compare displacements of splinted and nonsplinted restorations into implants featuring internal conical connections as screws were tightened by hand or by torque driver.

Materials And Methods: A stereolithic resin model was printed using computed tomography data from a patient missing mandibular left first and second molars.

Pilot study of 3D image correlation photogrammetry to assess strain and deformation of mouthguard materials.

Background/aim: The purpose of this investigation was to conduct a pilot study to evaluate the use of 3D image correlation photogrammetry (3DIC) in comparing strain characteristics of three commercially available mouthguard materials in the actual form of a mouthguard.

Material And Methods: 3DIC was used to measure strain and deformation on the surface of a mouthguard and a resin model. A computed tomographic scan of a maxilla of a patient was used to fabricate a resin test model.

Displacement of screw-retained single crowns into implants with conical internal connections.

Purpose: Internal conical implant-abutment connections without platforms may lead to axial displacement of crowns during screw tightening. This displacement may affect proximal contacts, incisal edge position, or occlusion. This study aimed to measure the displacement of screw-retained single crowns into an implant in three dimensions during screw tightening by hand or via torque driver.

Strain comparisons for splinted and nonsplinted cement-retained implant crowns.

The aim of this study was to compare strains generated by splinted and nonsplinted cement-retained implant crowns for two implants. A stereolithic resin cast was printed using computed tomography scan data from a patient. Two 4 × 6-mm implants were placed in the posterior left side of the cast.

Three-dimensional image correlation analyses for strains generated by cement and screw-retained implant prostheses.

Purpose: This study aimed to measure and compare strains generated by splinted implant crowns retained by cement or screws for two implants with applied load.

Materials And Methods: A stereolithic resin model was printed using computed tomography data from a patient missing all mandibular molar teeth. Two 4 × 6 mm implants were consecutively placed in the left side.

Comparison of strains for splinted and nonsplinted screw-retained prostheses on short implants.

Purpose: Because the evidence regarding the efficacy of splinting short implants on strain distribution is limited, this study aimed to measure and compare the strains generated by splinted and nonsplinted screw-retained implant crowns for short implants with internal connections.

Material And Methods: Computed tomographic scan data of a patient missing all mandibular molar teeth were digitized using a software program, and stereolithography was then used to produce an acrylic resin cast. Two 4- x 6-mm implants were placed in the left side.

Comparison of strains for splinted and nonsplinted implant prostheses using three-dimensional image correlation.

Purpose: This study aimed to analyze and compare strain distribution patterns for splinted and nonsplinted restorations for dental implants with an internal conical connection.

Materials And Methods: Two stereolithic acrylic resin models were created using computed tomographic scan data from a patient missing all mandibular molar teeth. Two implants were placed in the right side of two mandibular models using a computer-generated surgical guide and appropriate protocol.