1,846 results match your criteria abutment crowns

Clinical performance of implant crowns with customized zirconia abutments. A prospective cohort study with a 4.5- to 8.8-year follow-up.

Clin Oral Implants Res 2021 May 4. Epub 2021 May 4.

Professor emeritus, Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, Switzerland.

Objective: To assess the clinical and esthetic outcomes and patient satisfaction of screw-retained one-piece implant crowns fabricated with zirconia abutments after a 4.5- to 8.8-years follow-up. Read More

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The Effects of Beverages and Surface Treatments on the Color Stability of 3D-printed Interim Restorations.

J Prosthodont 2021 May 3. Epub 2021 May 3.

Associate Professor, Program Director, and Interim Chair, Advanced Education Program in Prosthodontics, Department of Prosthodontics, Indiana University School of Dentistry, Indianapolis, IN.

Purpose: To evaluate the color stability of 3D-printed interim restorations with different surface treatments while immersed in various staining solutions or beverages (artificial saliva, tea, coffee, and wine) for 6 months.

Material And Methods: An acrylic tooth was prepared for an all-ceramic full-coverage restoration. A laboratory scanner (7Series Dental Model and Impression Scanner; Dental Wings Inc, Montréal, Canada) was used to digitize the prepared abutment tooth. Read More

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In vitro evaluation of material dependent force damping behavior of implant-supported restorations using different CAD-CAM materials and luting conditions.

J Prosthet Dent 2021 Apr 28. Epub 2021 Apr 28.

Associate Professor, Department of Fixed Prosthodontics, Faculty of Dentistry, Ain Shams University, Cairo, Egypt; Head of Fixed prosthodontics department, Faculty of Dentistry, British University, Cairo, Egypt.

Statement Of Problem: Although force-damping behavior that matches natural teeth may be unobtainable, an optimal combination of crown material and luting agent might have a beneficial effect on the force absorption capacity of implant-supported restorations. However, the force-absorbing behavior of various restorative materials has not yet been satisfactorily investigated.

Purpose: The purpose of this in vitro study was to evaluate the material dependent force-damping behavior of implant-supported crowns fabricated from different computer-aided design and computer-aided manufacturing (CAD-CAM) materials luted to implant abutments under different conditions. Read More

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The effect of preparation taper on the resistance to fracture of monolithic zirconia crowns.

Dent Mater 2021 Apr 25. Epub 2021 Apr 25.

Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Norway.

Objective: Monolithic zirconia crowns have become a viable alternative to conventional layered restorations. The aim of this study was to evaluate whether the taper, and thus wall thickness, of the abutment or pre-defined cement space affect the fracture resistance or fracture mode of monolithic zirconia crowns.

Methods: A model tooth was prepared with a taper of 15° and a shallow circumferential chamfer preparation (0. Read More

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Fracture Resistance of Zirconia, Polyetheretherketone, and Polyetherketoneketone Implant Abutments After Aging.

Int J Oral Maxillofac Implants 2021 Mar-Apr;36(2):332-340

Purpose: This study aimed to assess the fracture resistance of zirconia (Zr), reinforced polyetheretherketone (PEEK), and polyetherketoneketone (PEKK) implant abutments restored with glass-ceramic crowns after thermomechanical aging.

Materials And Methods: Zr, reinforced PEEK, and PEKK titanium base abutments were divided into three groups (n = 10). CAD/CAM maxillary central incisor crowns were fabricated using monolithic lithium disilicate and luted to the abutments using resin cement. Read More

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Mechanical Stability of Restorations Supported by Titanium Base, Zirconia, and Polyetherketoneketone Abutments on One- and Two-Piece Zirconia Implants.

Int J Oral Maxillofac Implants 2021 Mar-Apr;36(2):313-321

Purpose: To evaluate survival, complication rates, and bending moments of one- and two-piece zirconia implants restored with different abutment materials and lithium disilicate crowns after aging, compared to titanium implants restored with titanium base-supported lithium disilicate crowns.

Materials And Methods: Sixty anterior crowns were either screwretained on two-piece titanium implants (C) and two-piece zirconia implants (T1, T2, T3) or cemented on one-piece zirconia implants (T4), resulting in 5 groups with 12 specimens each. For the screw-retained crowns, different abutment materials and implant connections were tested: titanium base with internal conical connection and horizontal joint component (C and T2), zirconia with internal hexagonal connection and horizontal joint component (T1), and polyetherketoneketone with internal hexagonal connection and horizontal joint component (T3). Read More

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Esthetic Outcomes of Implant-Supported Single Crowns Related to Abutment Type and Material: A Systematic Review.

Int J Prosthodont 2021 Mar-Apr;34(2):229-249

Purpose: To systematically review the influence of abutment material and configuration on the soft tissue esthetic outcomes of implant-supported single crowns (iSCs) after 3 years.

Materials And Methods: An electronic search on MEDLINE (PubMed) from January 2000 to July 2019 was conducted for clinical trials with no language restrictions. The focus question was: In partially edentulous patients with iSCs, does the abutment material (metal vs ceramic) or the configuration (standardized vs customized) have an effect on the soft tissue esthetic outcomes? Randomized controlled trials, controlled clinical trials, and prospective or retrospective case series with at least 10 patients and a minimum of 3 years of follow-up were included. Read More

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Mechanical behavior of nano-hybrid composite in comparison to lithium disilicate as posterior cement-retained implant-supported crowns restoring different abutments.

Dent Mater 2021 Apr 16. Epub 2021 Apr 16.

Department of Prosthodontics, Propaedeutics and Dental Materials, School of Dentistry, Christian-Albrechts University at Kiel, Germany. Electronic address:

Objective: Resin-based materials are gaining popularity in implant dentistry due to their shock absorption capacity. Therefore, the aim of this study was to evaluate the fracture strength and failure mode of resilient materials for both crowns and abutments and compare them to the most widely used materials in different combinations after subjection to long-term fatigue loading.

Methods: Forty-eight cement-retained implant-restorations were assembled on titanium implants. Read More

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Failure Load of Monolithic Lithium Disilicate Implant-Supported Single Crowns Bonded to Ti-base Abutments versus to Customized Ceramic Abutments after Fatigue.

J Prosthodont 2021 Apr 19. Epub 2021 Apr 19.

Department of Prosthodontics, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine-University, Düsseldorf, Germany.

Purpose: This laboratory study analyzed the influence of retention mode (screw- vs cement retained) and fatigue application on the failure load of monolithic lithium-disilicate (LDS) implant-supported single crowns (ISSC).

Material And Methods: A total of 72 samples of monolithic LDS (*Ivoclar Vivadent) ISSC were divided into three groups (n = 24) according to their type of retention mode: Group Ti-CAD: Titanium base (SICvantage CAD/CAM Abutment red (SIC invent AG), screw-retained milled monolithic LDS (IPS e.max CAD*); Group Ti-P: Titanium base (SICvantage CAD/CAM Abutment red), screw-retained pressed monolithic LDS (IPS e. Read More

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Comparison of Stress Distribution and Deformation of Four Prosthetic Materials in Full-mouth Rehabilitation with Implants: A Three-dimensional Finite Element Study.

J Contemp Dent Pract 2020 Nov 1;21(11):1210-1217. Epub 2020 Nov 1.

Department of Periodontics, Guntur, Andhra Pradesh, India.

Aim: This study aimed to compare the von Mises stress distribution and deformation on the implant, abutment, and abutment screw using metal-ceramic, zirconia, polyether ether ketone (PEEK), and Trinia as prosthetic materials for full-mouth cement-retained implant prosthesis using finite element analysis.

Materials And Methods: Four, 3-dimensional mandibular models were designed using Solidworks software. Six conical implants of 4. Read More

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November 2020

An application of finite element method in material selection for dental implant crowns.

Biomed Tech (Berl) 2021 Apr 12. Epub 2021 Apr 12.

Faculty of Technology, Sakarya Applied Sciences University, Sakarya, Turkey.

Materials used for dental crowns show a wide range of variety, and a dentist's choice can depend on several factors such as patient desires, esthetics, tooth factors, etc. One of the most important issues for implant surgery is the primary stability and it should be provided to minimize the risks of screw loosening, failed osseointegration, or nonunion. The current study aims to present the Finite Element Analysis (FEA)-based material selection strategy for a dental crown in terms of reducing the aforementioned risks of dental implants. Read More

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The Influence of Abutment Macrodesign on Facial Peri-implant Tissue Dimensions for Guided Placed and Restored Implants at Healed Sites: 1-Year CBCT Findings from a Randomized Controlled Clinical Trial.

Int J Periodontics Restorative Dent 2021 Mar-Apr;41(2):277-283

This study aimed to evaluate facial peri-implant tissue dimensions for implants connected to either convex or concave final abutments. Patients (n = 28) were randomly allocated to receive a single implant with an abutment of either convex (Group CX) or concave (Group CV) emergence shape. Twelve months after implant placement, CBCT scans were taken and reference points were identified: first visible bone-to-implant contact, implant shoulder (IS), bone crest (BC), and marginal mucosal level (MML). Read More

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Preliminary Results Using a Friction-Fit Crown to Abutment Connection.

Int J Periodontics Restorative Dent 2021 Mar-Apr;41(5146):217-224

One of the chronic problems with traditional cement or screw retention of crowns to implants is the development of biologic and technical complications, including soft tissue complications, bone loss, screw loosening, loss of retention, and veneering material fractures. The purpose of this case series report is to document preliminary results, specifically crown retention, using a friction-fit connection of crown to abutment. A sample composed of patients who had one or more implants restored between July 1, 2019, and October 30, 2019, were enrolled in this retrospective case-control series. Read More

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Stress distribution around different abutments on titanium and CFR-PEEK implant with different prosthetic crowns under parafunctional loading: A 3D FEA study.

J Oral Biol Craniofac Res 2021 Apr-Jun;11(2):313-320. Epub 2021 Mar 16.

Department of Prosthodontics, Rajarajeswari Dental College and Hospital, Bengaluru, Karnataka, India.

Aim & Objectives: Clinical trials had concluded a significant relationship between implant failure and bruxism. A three-dimensional (3D) finite element analysis (FEA) was done to evaluate the stress distribution in straight and angled abutments around titanium and carbon fiber-reinforced polyetheretherketone (CFR-PEEK) implant with 2 different prosthetic crowns under parafunctional loading.

Materials And Method: Twelve 3D models of bone block were created representing the maxillary right premolar area with osseointegrated implants. Read More

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Analysis of The Reproducibility of Subgingival Vertical Margins Using Intraoral Optical Scanning (IOS): A Randomized Controlled Pilot Trial.

J Clin Med 2021 Mar 1;10(5). Epub 2021 Mar 1.

Department of Prosthodontics and Dental Materials, University of Siena, 53100 Siena, Italy.

Background: The aim of this randomized controlled trial was to evaluate the capability of an IOS (Intra Oral Scanner) device, used in standardized conditions, to detect margins of abutments prepared with knife-edge finishing line located at three different levels in relation to the gingival sulcus.

Methods: sixty abutment teeth for treatment with full crowns were selected and randomly divided in three groups accordingly to the depth of the finishing line: Group A: supragingival margin; Group B: 0.5-1. Read More

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Effects of abutment height and type of cements on bond strength of monolithic zirconia single crowns luted to one-piece zirconia implants.

Int J Prosthodont 2021 Mar 18. Epub 2021 Mar 18.

Purpose: To test the bond strength of one-piece zirconia implants with either standard or reduced height using different luting agents and pretreatments of the ceramic crowns' inner surfaces.

Materials And Methods: Twenty monolithic CAD/CAM-fabricated zirconia single crowns were cemented onto 10 one-piece zirconia implants with either 5-mm or 4-mm abutment height (Z-Look3 Evo SLM, Z-Systems) using 13 different luting agents. After water storage, the crowns were removed using a specially developed test fixture in a universal testing machine (Z010, Zwick/Roell). Read More

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Laser microgrooved vs. machined healing abutment disconnection/reconnection: a comparative clinical, radiographical and biochemical study with split-mouth design.

Int J Implant Dent 2021 Mar 17;7(1):19. Epub 2021 Mar 17.

Department of Oral and Maxillo-Facial Sciences, La Sapienza University of Rome, Rome, Italy.

Background: Repeated removal and replacement of healing abutments result in frequent injuries to the soft tissues.

Purpose: The purpose of this study was to evaluate the effect of disconnection/reconnection of laser microgrooved vs. machined healing and prosthetic abutments on clinical periodontal parameters, marginal bone levels, and proinflammatory cytokine levels around dental implants. Read More

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A Technique to Fabricate a New Crown to an Existing Removable Partial Denture.

Prim Dent J 2021 Mar;10(1):96-100

Foundation Dentist, Nelson Road Dental Practice, Gillingham.

Fabricating a crown for a tooth that serves as an abutment for an existing removable partial denture (RPD) provides a restorative challenge. Typically, the compromised tooth requiring an extra-coronal restoration is initially restored. It is followed by the construction of a new RPD that accurately fits the restored abutment. Read More

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Tissue-level versus bone-level single implants in the anterior area rehabilitated with feather-edge crowns on conical implant abutments: An up to 5-year retrospective study.

J Prosthet Dent 2021 Mar 11. Epub 2021 Mar 11.

Assistant Professor, Department of Surgical Sciences (DISC), Implant and Prosthetic Dentistry Unit, University of Genoa, Genoa, Italy. Electronic address:

Statement Of Problem: Limited information is available on the differences between tissue-level implants with an ultrathin threaded microsurface conical transmucosal portion and bone-level implants rehabilitated with conical custom abutments.

Purpose: The purpose of this retrospective study was to assess the outcomes of crowns designed as per the biologically oriented preparation technique (BOPT) cemented on conical titanium abutments on tissue-level and bone-level implants.

Material And Methods: Patients consecutively rehabilitated with a delayed loading protocol with anterior implant-supported single crowns with a feather-edge margin, in function for at least 4 years, were recruited and divided into 2 groups based on the implant type they had received: tissue-level implants with a conical transmucosal portion or bone-level implants rehabilitated with a conical abutment by following the platform switching concept. Read More

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Effect of Crown Height on the Screw Stability of Titanium Screw-Retained Crowns.

J Prosthodont 2021 Mar 5. Epub 2021 Mar 5.

Division of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus, OH, USA.

Purpose: The aim of this in vitro study was to evaluate the effect of crown height on the screw stability of screw-retained titanium implant crowns subjected to cyclic loading conditions.

Materials And Methods: Twenty-one implants with internal hex connections were placed in epoxy resin holders. Mandibular first molar screw-retained titanium implant crowns with UCLA type, crown-abutment connections were CAD/CAM fabricated. Read More

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Laser retrieval of cemented zirconia single unit implant restoration: A pilot study: Part I - Force values.

Int J Prosthodont 2021 Mar 3. Epub 2021 Mar 3.

Purpose: To measure the retrieval force required to remove 1.5-mm-thick CAD/CAM zirconia copings cemented on zirconia (Zr) and titanium (Ti) stock implant abutments after a single application of erbium-doped yttrium scandium gallium garnet (Er:YSGG) laser.

Materials And Methods: A total of 60 monolithic Zr copings were cemented on Zr and Ti implant abutments with either a resin-modified glass-ionomer (RelyX Luting Plus Cement, 3M ESPE; Rx) or a zinc oxide eugenol cement (Temp-Bond, Kerr; Tb). Read More

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Short communication: In vitro pilot study: Are monolithic 3Y-TZP zirconia crowns too strong for titanium Implants?

Int J Prosthodont 2021 Mar 3. Epub 2021 Mar 3.

Purpose: To report on pilot tests for a planned study on single implant-supported crowns made from different restorative materials using finite element analysis (FEA) and in vitro load-to-failure testing.

Materials And Methods: Within this pilot study, FEA was conducted using Ansys 2019 R2 to simulate stress and deformation for implant-supported crowns made of lithium disilicate ceramic (LiS2) and zirconia (3Y-TZP). Additionally, an in vitro load to failure test was conducted using two specimens per group to evaluate the failure mode and to confirm the findings from the FEA. Read More

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Influence of cyclic loading on load-to-failure of different ceramic CAD-CAM implant-supported single crowns.

Int J Prosthodont 2021 Feb 26. Epub 2021 Feb 26.

Purpose: To compare the load to failure values of different ceramic CAD/CAM implant crown materials with drilled screw access holes with and without cyclic loading applied.

Materials And Methods: Forty zirconia abutments with a titanium base were pre-loaded onto implants to support maxillary right first premolar crowns that were milled from four different CAD/CAM ceramic materials (zirconia reinforced lithium silicate, hybrid ceramic, lithium disilicate, and zirconia; n = 10 each). After cementing the crowns, screw access channels were prepared by drilling through occlusal surfaces. Read More

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February 2021

Effect of different surface treatments on retention of cement-retained implant supported crowns.

Int J Prosthodont 2021 Feb 26. Epub 2021 Feb 26.

Purpose: To evaluate the effect of different treatments applied to titanium implant abutment surfaces on the retention of implant-supported cement-retained crowns using resin cement.

Materials And Methods: A total of 72 titanium implant abutments were divided into six groups (n = 12 each) based on the selected surface treatments: (1) untreated; (2) airborne particle abrasion; (3) hydrogen peroxide etching; (4) atmospheric plasma; (5) chemical mechanical polishing; and (6) titanium dioxide (TiO) nano coating. After the surface treatments, scanning electron microscopy analyses and surface roughness measurements of the abutment surfaces were performed. Read More

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February 2021

Comparative Evaluation of the Reproductive Trueness of Zirconia Crowns Fabricated Using Additive Manufacturing and Conventional Milling.

Int J Prosthodont 2021 Feb 26. Epub 2021 Feb 26.

Purpose: To evaluate the occlusal reproductive trueness of zirconia crowns fabricated using additive manufacturing (AM) and to compare the surface roughness of crowns fabricated using AM and conventional milling (CM).

Materials And Methods: Crowns were manufactured using AM and CM on abutments with total occlusal convergence angles of 16 and 20 degrees.

Results: The surface roughness of the AM crowns was less than that of the CM crowns. Read More

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February 2021

The effect of scanned area on the accuracy and time of anterior single implant scans: An in vitro study.

J Dent 2021 Feb 26:103620. Epub 2021 Feb 26.

Department of Reconstructive Dentistry and Gerodontology, University of Bern, Freiburgstrasse 7, 3007 Bern, Switzerland. Electronic address:

Objectives: To investigate the effect of scanned area on the accuracy and scan time of intraoral scans of an anterior implant.

Materials And Methods: Three operators experienced in intraoral scanning (at least 2-year experience) performed partial and complete-arch scans (n = 10) of a dentate resin model with an implant at left central incisor site by using an intraoral scanner (Trios3; 3Shape, Copenhagen, Denmark). Each partial- or complete-arch scan was superimposed to a reference scan from a laboratory scanner (Ceramill Map 600; Amann Girrbach AG). Read More

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February 2021

Two-piece zirconia implants supporting all-ceramic crowns: Six-year results of a prospective cohort study.

Clin Oral Implants Res 2021 Feb 26. Epub 2021 Feb 26.

Division of Regenerative Dental Medicine and Periodontology, University Clinics of Dental Medicine, University of Geneva, Geneva, Switzerland.

Objectives: The aim of this prospective clinical trial was to present the 6-year outcomes of a two-piece yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) implant system in partially edentulous patients.

Material And Methods: Forty-nine two-piece zirconia implants were placed in 32 patients systemically healthy. Zirconia abutments were connected with adhesive resin cement. Read More

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February 2021

Influence of the cement type on its removal quality from the zirconium oxide implant-supported restorations.

Int J Prosthodont 2021 Feb 23. Epub 2021 Feb 23.

Purpose: To assess excess cement removal after cementation of implant-supported cementretained restorations using different cements.

Materials And Methods: A model with soft tissue imitation, 20 individual zirconium oxide abutments, and 20 zirconium oxide crowns were fabricated. Half of the restorations were cemented using resin cement (RX) and the other half with resin-modified glass-ionomer cement (GC). Read More

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February 2021

A Comparative Study to Evaluate the Accuracy of Various Spacer Thickness for Polyvinyl Siloxane Putty-wash Impression Techniques: An Study.

Int J Clin Pediatr Dent 2020 Sep-Oct;13(5):536-542

Department of Prosthodontics and Crown and Bridge, Darbhanga Medical College and Hospital, Darbhanga, Bihar, India.

Introduction: An accurate impression is one of the prime factors for success of any restoration, more so in field of fixed prosthodontics. The critical aspect is to reproduce fine surface details along with ease of use. Knowledge of impression materials and the techniques to which each is best suited is essential in achieving consistent results. Read More

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February 2021

Finite Element Analysis of Stress in Bone and Abutment-Implant Interface under Static and Cyclic Loadings.

Front Dent 2020 Sep 7;17(21):1-8. Epub 2020 Sep 7.

Dental Research Center, Dentistry Research Institute, Tehran University of Medical Sciences, Tehran, Iran.

Objectives: The success of implant treatment depends on many factors affecting the bone-implant, implant-abutment, and abutment-prosthesis interfaces. Stress distribution in bone plays a major role in success/failure of dental implants. This study aimed to assess the pattern of stress distribution in bone and abutment-implant interface under static and cyclic loadings using finite element analysis (FEA). Read More

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September 2020