Goran I Benic

University of Zurich | UZH · Clinic of Fixed and Removable Prosthodontics and Dental Material Science

Aim: The aim of the present study was (i) to evaluate the clinical performance of reduced-diameter implants placed in the molar area and (ii) to test whether monolithic zirconia implant-supported crowns lead to similar clinical outcomes compared to porcelain-fused-to-metal crowns. Materials and methods: A total of 76 patients needing a single im...

Purpose: The aim of this study was to determine 1) the bone-regenerative effect of porcine bone block materials with or without collagen matrix incorporation, 2) the effect of a collagen barrier, and 3) the effect of adding recombinant human bone morphogenetic protein-2 (rhBMP-2) to the experimental groups. Methods: Four treatment modalities wer...

Objective: To compare the peri-implant soft-tissue dimensional changes following guided bone regeneration between particulate (particle group) and collagenated soft-block-type (block group) biphasic calcium phosphate (BCP). Materials and methods: This study investigated 35 subjects: 18 particle-group and 17 block-group patients. Cone-beam comput...

Aim: To test whether soft-type block bone substitute used for guided bone regeneration (GBR) of peri-implant defects leads to different dimension of the augmented hard tissue than particulate bone substitute. Material & methods: In 40 patients, 40 two-piece dental implants were placed >2 months after tooth extraction. Following random allocation...

Aim: The aim of this study was to identify the additional effects of collagen membrane (CM) and of synthetic bone substitute (BS) on lateral bone augmentation of chronic peri-implant defect with titanium mesh (TM). Materials and methods: Atrophic alveolar ridge was induced in 6 canine mandibles and 5 peri-implant defects were achieved in each he...

Aim To investigate new bone (NB) formation by using bone-block substitute materials with/without recombinant human bone morphogenetic protein-2 (rhBMP-2). Materials and Methods Three synthetic bone-block substitute materials [biphasic calcium phosphate (BCP); nanostructured hydroxyapatite (NH); 3D-printed tricalcium phosphate/hydroxyapatite (3DP)]...

Purpose: To test whether internal accuracy affects the load-bearing capacity of 0.5-mm-thick occlusal veneers made out of milled or heat-pressed lithium disilicate (LS2). Materials and methods: Extracted human molars (N = 80) were divided into four groups (n = 20 each) depending on the bonding substrate (enamel [E] or dentin [D]) and the fabrica...

Few investigations have evaluated the 3-dimensional (3D) accuracy of digital implant scans. The aim of this study was to evaluate the performance of 10 intraoral scanners (IOSs) (CEREC Omnicam, CEREC Primescan, CS 3600, DWIO, i500, iTero Element, PlanScan, Trios 2, Trios 3, and True Definition) in obtaining the accurate positions of 6 cylinders sim...

Statement of problem Studies evaluating the trueness of intraoral scanners (IOSs) at anatomic locations within an intracoronal preparation are lacking. Purpose The purpose of this in vitro study was to evaluate the trueness of digital scans obtained by IOSs at the margin and intaglio surfaces of intracoronal preparations. Material and methods Six...

Peri-implant bone dehiscences were grafted either with deproteinized bovine bone mineral (DBBM) block or with particulate DBBM, both covered with a collagen membrane and stabilized with resorbable pins. After 6 months, 17 biopsy samples were included for histologic assessment. Block and particulate DBBM rendered successful tissue integration. Parti...

Objective To investigate the clinical performance of monolithic zirconia implant crowns as compared to porcelain‐fused‐to‐metal (PFM) implant crowns. Materials and methods Seventy‐six healthy patients received reduced diameter implants in the molar region. Following random allocation, either a monolithic zirconia crown (Mono‐ZrO2) or a (PFM) was i...

The visual appearance of a dental reconstruction and adjacent soft tissue is an important factor for clinical success in esthetic sites. The overall professional assessment of esthetic appearance in reconstructive dentistry consists of a site specific evaluation of both the mucosa and of the reconstruction. The clinical and radiographic examination...

The aim of this study was to evaluate the trueness of 5 intraoral scanners (IOSs) for digital impression of simulated implant scan bodies in a partially edentulous model. A 3D printed partially edentulous mandible model made of Co-Cr with a total of 6 bilaterally positioned cylinders in the canine, second premolar, and second molar area served as t...

The aim of this study was to evaluate the trueness of 5 intraoral scanners (IOSs) for digital impression of simulated implant scan bodies in a complete-arch model. A 3D printed full-arch mandible model made of Co-Cr with a total of 6 bilaterally positioned cylinders in the canine, second premolar, and second molar area served as the study model. Di...

Objectives: To test whether block bone substitute used for guided bone regeneration (GBR) of peri-implant defects leads to different thickness of the augmented hard tissue than particulate bone substitute. Material & methods: In 24 patients, 24 two-piece dental implants were placed >4 months after tooth extraction. Following random allocation, 1...

Objectives: To test whether the load-bearing capacity of occlusal veneers made of ceramic or hybrid materials bonded to dentin does differ from those of porcelain-fused-to metal or lithium disilicate glass ceramic crowns. Material and methods: In 80 human molars, occlusal tooth substance was removed so that the defects extended into dentin, simu...

Objective To test the accuracy of measurement of interproximal peri‐implant bone defects at titanium (Ti) and zirconium dioxide (ZrO2) implants by digital periapical radiography (PR) and cone beam computed tomography (CBCT). Material and Methods A total of 18 models, each containing one Ti and one ZrO2 implant, were cast in dental stone. Six model...

Statement of problem: Trials comparing the overall performances of digital and conventional workflows in restorative dentistry are lacking. Purpose: The purpose of the third part of this clinical study was to test whether the fit of zirconia 3-unit frameworks for fixed partial dentures fabricated with fully digital workflows differed from that o...

Objectives: The objective of this study was to test whether or not the load-bearing capacity of occlusal veneers bonded to enamel and made of ceramic or hybrid materials does differ from those of porcelain-fused-to-metal or lithium disilicate glass ceramic crowns. Material and methods: In 80 human molars occlusal enamel was removed without exten...

Statement of problem: Clinical trials are needed to evaluate digital and conventional technologies for providing fixed partial dentures. Purpose: The purpose of the first part of this clinical study was to test whether complete-arch digital scans were similar to or better than complete-arch conventional impressions regarding time efficiency and...

Statement of problem: Clinical trials are needed to evaluate the digital and conventional fabrication technology for providing fixed partial dentures (FPDs). Purpose: The purpose of the second part of this clinical study was to compare the laboratory production time for tooth-supported, 3-unit FPDs by means of computer-aided design and computer-...

Objectives: This work aimed to investigate the effectiveness and predictability of different treatment modalities for gain of keratinized tissue (KT) in fully edentulous jaws prior to dental implant placement: apically positioned flap (APF), APF plus xenogeneic collagen matrix (XCM), and APF plus free gingival graft (FGG). Materials and methods:...

Purpose: The purpose of this systematic review was to assess the survival of implants placed in augmented sinuses on a medium- to long-term basis, and identify factors affecting implant survival such as surgical technique, bone grafts, and timing of implant placement. Materials and methods: A literature search up to July 2016 was performed to id...

Objectives: The objective of this study was to test whether or not soft tissue augmentation with a volume-stable collagen matrix (VCMX) leads to similar volume gain around dental implants compared to autogenous subepithelial connective tissue graft (SCTG). Materials and methods: In 12 adult beagle dogs, immediate implants were placed with simult...

The aim of this study was to compare customized zirconia and titanium abutments with respect to survival rates and technical, biologic, and esthetic outcomes. A total of 28 patients with single implants were randomly assigned to 12 customized zirconia (test, AC) and 16 customized titanium (control, MC) abutments. Technical, biologic, and esthetic o...

This study quantified the strain development after inserting implant-borne fixed dental prosthesis (FDP) to various implant–abutment joints. Two bone-level implants (∅ = 4.1 mm, RC, SLA 10 mm, Ti, Straumann) were inserted in polyurethane models (N = 3) in the area of tooth nos 44 and 47. Four-unit veneered zirconium dioxide FDPs (n = 2) were fabric...

The purpose of this study was to test whether prosthetic treatment with different intraradicular posts influences the color of the buccal gingiva at teeth restored with zirconia crowns. A total of 31 patients in need of a full-coverage single crown at an endodontically treated premolar, canine, or incisor in the maxilla or the mandible were include...

The aim of this study was to compare customized zirconia and titanium abutments with respect to survival rates and technical, biologic, and esthetic outcomes. A total of 28 patients with single implants were randomly assigned to 12 customized zirconia (test, AC) and 16 customized titanium (control, MC) abutments. Technical, biologic, and esthetic o...

The objectives of this study were to compare conventional and computer-assisted implant planning and placement (CAIPP) protocols regarding surgical planning predictability, intraoperative complications, and patient-centered outcomes. Partially edentulous patients (N = 73) were randomly allocated to one of three treatment groups: control (C, n = 26)...

Purpose: The aim of this clinical study was to test whether or not digital workflows for the fabrication of crowns render different clinical outcomes from the conventional pathway with respect to (1) crown quality, and (2) time efficiency. Material and methods: For each of the 10 patients in need of one tooth-supported crown, five monolithic cro...

Aim: To test whether guided bone regeneration (GBR) of peri-implant defects at zirconia (ZrO2 ) implants differs from GBR at titanium (Ti) implants regarding the bone integration of the implant and of the grafting material. Materials and methods: Maxillary premolars and molars were extracted in seven dogs. After 5 months, four semi-saddle bone d...

Objective: The aim of this pilot study was to test whether a porcine collagenated bone substitute block (PCBB) and collagen membrane (CM) loaded with bone morphogenetic protein-2 (BMP-2) used for horizontal ridge augmentation differ from PCBB and CM without BMP-2 regarding the osseointegration of the grafting material and the maintenance of the ri...

Objectives: To test whether or not a one- (S1) and a two-piece (S2) dental implant systems render the same biological, technical, and esthetic outcomes regarding implants and implant-supported reconstructions over an observation period of 4 to 6 years. Materials and methods: Sixty patients were randomly assigned to receive S1 or S2 implants. The...

This paper presents European expert consensus guidelines on the management of severe tooth wear. It focuses on the definition of physiological vs pathological tooth wear and recommends diagnosis, prevention, counseling, and monitoring aimed at elucidating the etiology, nature, rate and means of controlling pathological tooth wear. Management decisi...

Aim: To test whether an equine bone substitute block used for guided bone regeneration (GBR) of peri-implant defects differs from bovine block or particulate bone substitutes regarding the hard and soft tissue contours of the augmented ridge. Material & methods: Two semi-saddle bone defects were prepared in each side of the mandible of eight dog...

Digital approaches to assess the misfit of fixed dental prostheses have been limited to in vitro evaluation. The present article describes a fully digital technique for the in vivo assessment of the fit of fixed dental prostheses by means of a chairside optical scanner and software for 3-dimensional (3D) analysis. The 3D digital capture is performe...

The cover image, by Daniel S. Thoma et al., is based on the Animal Experiment Soft tissue volume augmentation at dental implant sites using a volume stable three-dimensional collagen matrix – histological outcomes of a preclinical study, DOI: 10.1111/jcpe.12635.

Aim: to assess i) bone regeneration around implants placed early in sites with or without ridge preservation and i) if the bone substitute material (DBBM-C) has to be removed at implant placement MATERIALS AND METHODS: In eight beagle dogs, three sites were randomly assigned to ridge preservation (DBBM-C plus collagen matrix (CMX)) (two sites; RP)...

Aim: To test whether implants placed with simultaneous guided bone regeneration (GBR) differ from implants placed without GBR regarding survival rate, interproximal marginal bone level (MBL), and dimensions of buccal bone and mucosa. Material & methods: Twenty-three patients treated 15 years earlier were included. Machined implants had been inse...

Statement of problem: Clinical studies are needed to evaluate the entire digital and conventional workflows in prosthetic dentistry. Purpose: The purpose of the second part of this clinical study was to compare the laboratory production time for tooth-supported single crowns made with 4 different digital workflows and 1 conventional workflow and...

Aim: To test whether or not soft tissue augmentation with a collagen matrix (VCMX) leads to a similar increase in ridge width around dental implants compared to the use of an autogenous subepithelial connective tissue graft (SCTG). Materials and methods: In 12 dogs, immediate dental implants were placed with simultaneous guided bone regeneration...

Statement of problem: Trials comparing the overall performance of digital with that of conventional workflows in restorative dentistry are needed. Purpose: The purpose of the third part of a series of investigations was to test whether the marginal and internal fit of monolithic crowns fabricated with fully digital workflows differed from that o...

Statement of problem: Trials comparing the overall performance of fully digital and conventional workflows in reconstructive dentistry are needed. Purpose: The purpose of the first part of this randomized controlled clinical trial was to determine whether optical impressions produce different results from conventional impressions with respect to...

Objectives: To test whether GBR with an L-shaped soft-block bone substitute and particulate bone substitute differs from GBR with particulate bone substitute as regards the volume stability of the augmented region during flap closure. Materials and methods: Twenty peri-implant box-shaped bone defects were created in 10 pig mandibles. Every bone...

Aim: To test whether implant placement with simultaneous guided bone regeneration (GBR) differs from implant placement without GBR regarding the change in marginal mucosal contour. Materials and methods: In 28 patients, single implants were placed >4 months after tooth extraction. Eighteen implants were completely surrounded by native bone, and...

Aim: To spectrophotometrically and visually test whether the peri-implant mucosal color differs from the color of the natural gingiva. Material and methods: Forty single implants in the incisor and premolar region of 40 patients were assessed 3-7 years after implant placement. The differences of the color components lightness, chroma along red-g...

Aim: To test whether the mandibular retromolar region renders different results from the chin region with respect to the amount of bone available for the harvesting of block grafts. Material and methods: Sixty cone beam computed tomography (CBCT) scans of mandibles of adult patients without pathologic findings in the chin and retromolar region w...

Aim: To assess the accuracy of periapical radiography in measuring peri-implant bone levels. Materials and methods: Twenty-five subjects with 46 implants in need of surgical treatment for peri-implantitis were included in this cross-sectional study. Prior to surgery, periapical radiographs were taken, a prediction of type of defect was made and...

Aim To test whether titanium-zirconium (Ti-Zr) 3.3 mm diameter implants perform differently from titanium (Ti) 4.1 mm diameter implants with respect to marginal bone level (MBL) and clinical parameters. Material and Methods Forty patients in need of a single-implant crown in the anterior or premolar regions were enrolled in two centres. Following r...

In 2011, the first consensus conference on guidelines for the use of cone-beam computed tomography (CBCT) was convened by the Swiss Society of Dentomaxillofacial Radiology (SGDMFR). This conference covered topics of oral and maxillofacial surgery, temporomandibular joint dysfunctions and disorders, and orthodontics. In 2014, a second consensus conf...

Objective: The task of this working group was to assess the existing knowledge in computer-assisted implant planning and placement, fabrication of reconstructions applying computers compared to traditional fabrication, and assessments of treatment outcomes using novel imaging techniques. Material and methods: Three reviews were available for ass...

Objective: To assess whether or not peri-implant soft tissue dimensions and hard tissue integration of loaded zirconia implants are similar to those of a titanium implant. Materials and methods: In 6 dogs, two one-piece zirconia implants (VC, ZD), a two-piece zirconia implant (BPI) and a control one-piece titanium implant (STM) were randomly pla...

To test whether an equine bone substitute block used for guided bone regeneration (GBR) of peri-implant defects renders different results from bovine block or particulated bone substitutes regarding the dimensions of the augmented ridge and the amount of new bone. Mandibular premolars and molars were extracted in eight dogs. After 4 months, four se...

To examine the literature on novel digital imaging techniques for the assessment of outcomes in oral rehabilitation with dental implants. An electronic search of Medline and Embase databases including studies published prior to 28th December 2014 was performed and supplemented by a manual search. A synthesis of the publications was presented descri...

Reference elements are necessary to transfer a virtual planning into reality for guided implant placement. New systems allow matching optical scans with three-dimensional radiographic images. To test whether digitally designed three-dimensional printed templates (D-temp) fabricated by matching surface scans and cone beam computed tomography (CBCT)...

The aim was to test whether or not the marginal bone-level alterations of loaded zirconia implants are similar to the bone-level alterations of a grade 4 titanium one-piece dental implant. In six dogs, all premolars and the first molars were extracted in the mandible. Four months later, three zirconia implants (BPI, VC, ZD) and a control titanium o...

To test whether the use of (i) particulated bone substitute + collagen membrane used for guided bone regeneration (GBR) of peri-implant bone defects renders different results from (ii) particulated bone substitute + collagen membrane + fixation pins and from (iii) block bone substitute + collagen membrane with respect to the volume stability of the...

To evaluate the volumetric changes occurring from prosthesis insertion to the 1-year follow-up (FU) using one- and two-piece dental implants. Sixty patients were randomly assigned to receive one-piece or two-piece implants. Casts were obtained at baseline (insertion of final reconstruction) and at 1 year of loading. Finally, 33 pairs of casts (BRA...

The development of bone augmentation procedures has allowed placement of dental implants into jaw bone areas lacking an amount of bone sufficient for standard implant placement. Thus, the indications for implants have broadened to include jaw regions with bone defects and those with a bone anatomy that is unfavorable for implant anchorage. Of the d...

AimTo test whether or not the network structure and the addition of recombinant human platelet-derived growth factor-BB (rhPDGF-BB) to a chemically cross-linked collagen matrix (CCM)- and a non-cross-linked collagen matrix (NCCM)-influenced tissue integration, angiogenesis, and matrix degradation.Materials and methodsFour treatment modalities were...

AimThe aim of this study was to test whether or not the intensity of artifacts around implants in cone-beam computed tomography (CBCT) differs between titanium, titanium–zirconium and zirconium dioxide implants.Materials and methodsTwenty models of a human mandible, each containing one implant in the single-tooth gap position 45, were cast in denta...

No abstract available.

PURPOSE: To test whether or not immediate loading of single-implant crowns renders different results from early and conventional loading with respect to implant survival, marginal bone loss, stability of peri-implant soft tissue, esthetics, and patient satisfaction. MATERIALS AND METHODS: An electronic search of Medline and Embase databases includi...

The aim of this controlled clinical study was to compare a polyethylene glycol membrane (PEG) used for bone regeneration of peri-implant defects to a collagen membrane with respect to implant survival rate, dimensions of buccal peri-implant bone and mucosa. Thirty-seven patients who received single tooth implants with simultaneous guided bone regen...

The primary aim of this study was to test whether intraradicular posts of different colors induce different amounts of color change of the buccal gingiva. Twentythree patients in need of a post-and-core buildup at one endodontically treated incisor, canine, or premolar were included. Titanium (Ti), zirconia (Zi), and glass fiber (Gf) posts were con...

To test whether titanium-zirconium (TiZr) 3.3 mm diameter implants perform differently from titanium (Ti) 4.1 mm diameter implants with respect to marginal bone level (MBL) and clinical parameters. Forty subjects in need of a single implant-supported crown in the anterior or premolar regions were recruited in two centres. After random allocation, e...

Objective To compare the clinical and radiographic outcomes of implants and implant-supported reconstructions using a 1-piece (STM) and a 2-piece (BRA) dental implant system. Material and methodsSixty patients were randomly assigned to receive STM or BRA implants. The implants restored with fixed or removable prostheses. Baseline measurements (day...

Background The treatment of mandibular edentulism with implant fixed complete dental prostheses (IFCDPs) is a routinely used treatment option. PurposeThe study aims to report the implant and prosthodontic survival rates associated with IFCDPs for the edentulous mandible after an observation period of a minimum 5 years. Materials and Methods An elec...

The objective of this study was to evaluate the geometric pattern and the intensity of artifacts around titanium implants in cone beam computed tomography (CBCT) using an in vitro model. Ten test models, each containing one 4.1-mm-diameter titanium implant, were cast from a human mandible using silicone impression material and dental stone. Each mo...

The accuracy of implant casts generated with various impression techniques was mainly investigated in vitro resulting in limited clinical data. Purpose: (1) To compare the three-dimensional (3-D) accuracy of splinted and non-splinted impression techniques to the control casts (verification jigs) that had been used for actual patient treatment; and...

Diagnostics imaging is an essential component of patient selection and treatment planning in oral rehabilitation by means of osseointegrated implants. In 2002, the EAO produced and published guidelines on the use of diagnostic imaging in implant dentistry. Since that time, there have been significant developments in both the application of cone bea...

The purpose of the present systematic review was to evaluate the scientific literature regarding the professional assessment of aesthetics in implant dentistry. An electronic search of Medline database and Cochrane Central Register of Controlled Trials was performed, and complemented by a manual search. Clinical or validation studies (Part 1) and r...

The objective of this study was to evaluate the dimensions of buccal bone and soft tissue at immediately placed implants over a 7-year period. Twenty-four patients, that participated in a clinical prospective study and received implants immediately placed into extraction socket, were enrolled for this study. Residual bone defects were grafted with...

Introduction: The treatment of dentinogenesis imperfecta is complex and requires a team approach. The aim of this case report is to describe the steps taken in the long-term rehabilitation of a middle-aged female with dentinogenesis imperfecta with severe attrition. This treatment included an initial temporary treatment to restore esthetic appearan...

The aim of the present review was to systematically assess the dental literature in terms of soft tissue grafting techniques. The focused question was: is one method superior over others for augmentation and stability of the augmented soft tissue in terms of increasing the width of keratinized tissue (part 1) and gain in soft tissue volume (part 2)...

The aim of this study was to test whether or not implants associated with bone regeneration show the same survival and success rates as implants placed in native bone in patients requiring both forms of therapy. Thirty-four patients (median age of 60.3 years, range 18-77.7 years) had been treated 5 years before the follow-up examination. Machined s...