2,334 results match your criteria 4-mm implants

Stress evaluation of different implant lengths on atrophic edentulous mandibles with fixed full-arch implant-supported prosthesis: a finite element analysis.

Comput Methods Biomech Biomed Engin 2021 Jun 14:1-17. Epub 2021 Jun 14.

Department of Prosthesis and Oral Facial Surgery, Federal University of Pernambuco, Recife, Brazil.

Finite element analysis was used to compare the effect of different implant lengths on atrophic mandible with full-arch fixed prostheses. Four models were constructed with different implant lengths: 4, 6, 8 and 10 mm. A 100-N occlusal load was applied. Read More

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Clinical outcomes and safety of the SpineJack vertebral augmentation system for the treatment of vertebral compression fractures in a United States patient population.

J Clin Neurosci 2021 Jul 13;89:237-242. Epub 2021 May 13.

Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins Hospital, 1800 Orleans Street, Baltimore, MD 21287, United States; Department of Radiology, Thomas Jefferson University Hospital, 111 S 11(th) St, Philadelphia, PA 19107, United States.

The SpineJack implant system was recently FDA approved for treatment of vertebral compression fractures (VCF), however United States-based outcomes data is lacking. We sought to examine the safety and clinical outcomes following vertebral augmentation using the SpineJack implant for treatment of VCF in a U.S. Read More

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Influence of collar height of definitive restoration and type of luting cement on the amount of residual cement in implant restorations: A clinical study.

J Prosthet Dent 2021 Jun 8. Epub 2021 Jun 8.

Senior Resident, Department of Prosthodontics, Government Dental College, Kozhikode, Kerala, India.

Statement Of Problem: Residual cement in the peri-implant sulcus may cause peri-implant mucositis, which can lead to peri-implantitis. Clinical studies comparing the role of the collar height of the definitive restoration and the type of cement used for luting the prosthesis in the amount of residual cement are lacking.

Purpose: The purpose of this clinical study was to determine the volume of residual cement left undetected in the peri-implant sulcus by an implant prosthesis with 3 different collar heights and 3 luting cements. Read More

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Clinical and radiographic performance of self-locking conical connection implants in the posterior mandible: five-year results of a two-centre prospective study.

Clin Oral Implants Res 2021 Jun 11. Epub 2021 Jun 11.

Department of Oral and Maxillofacial Surgery, Johannes Gutenberg-University, Medical Centre, Augustusplatz 2, D-55131, Mainz, Germany.

Objective: This prospective study aims to assess the 5-year clinical performance of implants with internal conical connection and platform-switched abutments in the posterior mandible.

Material And Methods: Healthy adults missing at least two teeth in the posterior mandible and with a natural tooth mesial to the implant site received two or three adjacent implants. After a transmucosal healing period single crown restorations were cemented on platform-switched abutments. Read More

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Combination of a Hydraulic Device and Nanohydroxylapatite Paste for Minimally Invasive Transcrestal Sinus Floor Elevation: Procedure and 4-Year Results.

Int J Oral Maxillofac Implants 2021 May-Jun;36(3):587-597

Purpose: The objectives of this retrospective study were to describe a transcrestal sinus floor elevation technique combining the use of a hydraulic device and a nanohydroxylapatite paste and to report on 4-year clinical and radiographic outcomes.

Materials And Methods: The sinus floor elevation procedure used a specially designed drill (SinusJet) to start sinus membrane unsticking and a nanohydroxylapatite paste (Ostim) for further sinus membrane elevation and bone augmentation. It was performed as a one-step procedure with immediate implant placement or a two-step procedure with delayed implant placement 9 months later. Read More

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Implants Placed in Adolescents Followed for Up to 15.5 Years: A Retrospective Case Series.

Int J Oral Maxillofac Implants 2021 May-Jun;36(3):561-568

Purpose: To evaluate the clinical outcomes of unsplinted implant-supported single crowns placed in adolescents, ages 10 to 19 years, and followed up from 5 to 15 years.

Materials And Methods: This retrospective case series evaluated the outcomes of implant-supported single crowns placed in adolescents between June 2002 and January 2015. The patients were treated with locking-taper connection implants under a two-stage rehabilitation technique. Read More

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Effects on Ridge Dimensions, Bone Density, and Implant Primary Stability with Osseodensification Approach in Implant Osteotomy Preparation.

Int J Oral Maxillofac Implants 2021 May-Jun;36(3):474-484

Purpose: To compare the amount of bone expansion, bone density change, and implant primary stability with an osseodensification technique to a conventional drilling protocol.

Materials And Methods: Twenty-four bovine rib segments (20 × 25 × 4 mm) with a 1-mm outer layer of cortical bone were randomly divided into two groups: an osseodensification group and a conventional drilling group. Each bone sample received one 4. Read More

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Comparison of Postoperative Anatomy Using Anatomic Total Shoulder Arthroplasty Versus Soft-Tissue Balancing Total Shoulder Arthroplasty.

J Am Acad Orthop Surg 2021 Jun 8. Epub 2021 Jun 8.

From the Department of Orthopaedics, Stanford University Hospitals, Redwood City, CA (Truntzer), the Department of Orthopaedics, University of Kansas Medical Center, Kansas City, KS (Vopat, Barnds), the Department of Orthopaedics, Brown University, Providence, RI (Schwartz, Anavian, Green), and the Department of Orthopaedic Surgery, Yale University, New Haven, CT (Blaine).

Background: The importance of anatomic reconstruction of the proximal humerus on shoulder biomechanics and kinematics after anatomic total shoulder replacement (aTSR) has been highlighted by a number of investigations. The humeral head designs of current-generation shoulder arthroplasty emphasize either anatomic or soft-tissue balancing total shoulder arthroplasty (sbTSR) philosophies. The purpose of this study was to compare the postoperative anatomy of TSR systems used to treat primary glenohumeral osteoarthritis. Read More

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More Anterior Contact Position in Patients With Fixed-Bearing Unicompartmental Knee Arthroplasty During Daily Activities Than Wear Simulator.

Front Bioeng Biotechnol 2021 20;9:666435. Epub 2021 May 20.

Department of Orthopedics, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, China.

Background: While wear simulation of unicompartmental knee arthroplasty (UKA) showed outstanding long-term wear performance, studies reported that polyethylene (PE) wear was responsible for 12% fixed-bearing (FB) UKA failure. This paper aimed to quantify the 6-degrees-of-freedom (6-DOF) knee kinematics and contact positions of FB UKA during daily activities and compare with the previous results of wear simulator.

Methods: Fourteen patients following unilateral medial FB UKA received a CT scan and dual fluoroscopic imaging during level walking, single-leg deep lunge, and sit-to-stand motion for evaluating 6-DOF FB UKA kinematics. Read More

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Considerable inter-individual variability of tibial geometric ratios renders bone-implant mismatch unavoidable using off-the-shelf total knee arthroplasty: a systematic review and meta-analysis.

Knee Surg Sports Traumatol Arthrosc 2021 Jun 1. Epub 2021 Jun 1.

Centre Orthopédique Santy, Ramsay Santé, Hôpital Privé Jean Mermoz, Lyon, France.

Purpose: The purpose of this systematic review and meta-analysis was to investigate the variability in tibial geometric ratios among knees of different sexes and races to determine whether commercially-available tibial baseplates accommodate the morphologic diversity. The hypothesis was that anthropometric studies report considerable variability of tibial geometric ratios among sexes and races.

Methods: This systematic review and meta-analysis was performed according to the preferred reporting items for systematic reviews and meta-analyses (PRISMA) criteria. Read More

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Influence of different incision designs on bone increment of guided bone regeneration (Bio-Gide collagen membrane +Bio-OSS bone powder) during the same period of maxillary anterior tooth implantation.

Bioengineered 2021 Dec;12(1):2155-2163

Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou, China.

Exploring the influence of different incision designs on bone increment of guided bone regeneration [Bio-Gide collagen membrane +Bio-OSS bone powder (carbonate apatite crystal extracted from bovine bones), Bio-OSS bone meal was placed on the surface of the bone defect and then covered with a Bio-Gide membrane to close the wound] during the same period of maxillary anterior tooth implantation. The 99 patients from the stomatology department were divided into 3 groups: small incision (N = 30, group A), wide incision (N = 39, group B), internal gingival sulcus incision (N = 30, group C). At the different time (immediately after surgery, 6 months, 12 months and 24 months), the width and height of labial bone at different implant margin (2 mm, 4 mm, 6 mm) has no significant difference in comparison of any two of the three groups (p > 0. Read More

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December 2021

Guided bone regeneration simultaneous with implant placement using bovine-derived xenograft with and without liquid platelet-rich fibrin: a randomized controlled clinical trial.

Clin Oral Investig 2021 May 28. Epub 2021 May 28.

Department of Oral and Maxillofacial Surgery, School of Dentistry, Ege University, İzmir, Turkey.

Objective: To assess augmentation success after guided bone regeneration (GBR) carried out simultaneously with implant placement using bovine-derived xenograft alone and in combination with liquid platelet-rich fibrin (liquid-PRF).

Methods: This randomized controlled clinical trial was conducted on patients with horizontal bone deficiency in the posterior regions of the mandible. After implant placement, GBR procedures were randomly performed using liquid-PRF-enriched bovine-derived xenograft (for the test group) and with bovine-derived xenograft alone (for the control group). Read More

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Cone-beam computed tomographic analysis of apical transportation and centering ratio of ProTaper and XP-endo Shaper NiTi rotary systems in curved canals: an in vitro study.

BMC Oral Health 2021 05 25;21(1):277. Epub 2021 May 25.

PhD of Statistics, Tabriz, Iran.

Background: Cleaning and shaping of the root canal system is an important step of endodontic treatment. Canal transportation is a common procedural error in preparation of curved canals. This study aimed to compare the canal transportation and centering ratio of two rotary files in curved canals using cone-beam computed tomography (CBCT). Read More

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Practical strategy to construct anti-osteosarcoma bone substitutes by loading cisplatin into 3D-printed titanium alloy implants using a thermosensitive hydrogel.

Bioact Mater 2021 Dec 14;6(12):4542-4557. Epub 2021 May 14.

Department of Orthopedics, Peking University Third Hospital, Beijing, 100191, People's Republic of China.

Surgical resection and perioperative adjuvant chemotherapy-based therapies have improved the prognosis of patients with osteosarcoma; however, intraoperative bone defects, local tumour recurrence, and chemotherapy-induced adverse effects still affect the quality of life of patients. Emerging 3D-printed titanium alloy (TiAlV) implants have advantages over traditional implants in bone repair, including lower elastic modulus, lower stiffness, better bone conduction, more bone in-growth, stronger mechanical interlocking, and lager drug-loading capacity by their inherent porous structure. Here, cisplatin, a clinical first-line anti-osteosarcoma drug, was loaded into TiAlV implants, within a PLGA-PEG-PLGA thermo-sensitive hydrogel, to construct bone substitutes with both anti-osteosarcoma and bone-repair functions. Read More

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December 2021

Effects of insertion torque on the structure of dental implants with different connections: Experimental pilot study in vitro.

PLoS One 2021 19;16(5):e0251904. Epub 2021 May 19.

Department of Materials Engineering, Pontificial Catholic University of Rio Grande do Sul, Porto Alegre, Brazil.

Objective: During the insertion of dental implants in the bone tissue, different torque values can be applied. However, the high applied torque can cause damage to the implant connection. Our study sought to evaluate, by measuring the angle of rotation of the insertion drive and, later microscopic observation, possible changes in the structure of implants of different diameters with 3 different types of connections after the application of 4 different torque intensities. Read More

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Use of autogenous bone versus deproteinised bovine bone matrix in one-stage lateral sinus floor elevation in severely atrophied maxillae: A 7-year randomised controlled trial.

Int J Oral Implantol (Berl) 2021 Mar;14(1):101-112

Purpose: To compare 100% deproteinised bovine bone matrix grafts (DBBM, test group) and 100% autogenous bone grafts (AB, control group) for lateral maxillary sinus floor elevation in a blinded, parallel-group, randomised clinical trial.

Materials And Methods: Patients with 1 to 3 mm of residual bone height were randomised for sinus floor elevation with DBBM or AB grafts and simultaneous implant placement. The outcome variables were implant failure, complications, subjective satisfaction and radiographic peri-implant bone level 7 years after loading. Read More

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Guided tooth autotransplantation in edentulous areas post-orthodontic treatment.

J Esthet Restor Dent 2021 May 17. Epub 2021 May 17.

Department of Endodontics, Universitat Internacional de Catalunya, Barcelona, Spain.

Objective: Tooth autotransplantation with a complete root formation to replace one or more lost teeth is indicated as a cost-effective alternative to implants. The aim of this case report was to describe a successfully guided autotransplantation of a maxillary third molar with fully formed roots into a surgically created socket after orthodontic space opening.

Clinical Considerations: A guided autotransplantation of the maxillary left third molar into the missing maxillary left first molar site was chosen. Read More

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PRF versus xenograft in sinus augmentation in case of HA-coating implant placement: A 36-months retrospective study.

Adv Clin Exp Med 2021 May 13. Epub 2021 May 13.

Department of Oral Surgery, Wroclaw Medical University, Poland.

Background: Sinus lift with a simultaneous implant placement in the residual maxilla is a common technique used worldwide. Nevertheless, choosing an ideal grafting material remains an object of dispute. The use of an autologous blood-derived graft, known as platelet rich fibrin (PRF), has not yet been recognized to be as good as xenografts and alloplastic materials. Read More

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Clinical and radiographic evaluation of jumping distance management using a collagen matrix in flapless immediate implant placement.

Dent Med Probl 2021 May 11. Epub 2021 May 11.

Private practice, El Paso, USA.

Background: Improvement in implant design has made implant dentistry a challenging treatment modality worldwide.

Objectives: This study aimed to investigate the efficacy of a xenogeneic collagen matrix in managing 3-4-millimeter gaps in flapless immediate implant placement.

Material And Methods: Twenty-two patients received 39 immediate implants via the flapless approach. Read More

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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.

Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, 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-year follow-up. Read More

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Virtual Surgical Planning, Stereolitographic Models and CAD/CAM Titanium Mesh for Three-Dimensional Reconstruction of Fibula Flap with Iliac Crest Graft and Dental Implants.

J Clin Med 2021 Apr 29;10(9). Epub 2021 Apr 29.

Maxillofacial Surgery Department, Hospital General Universitario Gregorio Marañón, C/Doctor Esquerdo 46, 28007 Madrid, Spain.

Mandibular reconstruction with fibula flap shows a 3D discrepancy between the fibula and the remnant mandible. Eight patients underwent three-dimensional reconstruction of the fibula flap with iliac crest graft and dental implants through virtual surgical planning (VSP), stereolitographic models (STL) and CAD/CAM titanium mesh. Vertical ridge augmentation and horizontal dimensions of the fibula, peri-implant bone resorption of the iliac crest graft, implant success rate and functional and aesthetic results were evaluated. Read More

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The Treatment of Peri-Implant Diseases: A New Approach Using HYBENX as a Decontaminant for Implant Surface and Oral Tissues.

Antibiotics (Basel) 2021 Apr 30;10(5). Epub 2021 Apr 30.

Division of Oral Surgery and Implantology, Institute of Clinical Dentistry, Department of Head and Neck, Catholic University of the Sacred Heart, Gemelli University Polyclinic Foundation, 00168 Rome, Italy.

Background: Peri-implantitis is a pathological condition characterized by an inflammatory process involving soft and hard tissues surrounding dental implants. The management of peri-implant disease has several protocols, among which is the chemical method HYBENX. The aim of this study is to demonstrate the efficacy of HYBENX in the treatment of peri-implantitis and to compare HYBENX with other chemical agents used in the surgical treatment of peri-implantitis. Read More

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A Novel Zirconia-Based Composite Presents an Aging Resistant Material for Narrow-Diameter Ceramic Implants.

Materials (Basel) 2021 Apr 23;14(9). Epub 2021 Apr 23.

Medical Center-University of Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine, University of Freiburg, Hugstetter Str. 55, 79106 Freiburg, Germany.

A novel ceria-stabilized zirconia-alumina-aluminate composite (Ce-TZP-comp) that is not prone to aging presents a potential alternative to yttrium-stabilized zirconia for ceramic oral implants. The objective of this study was to evaluate the long-term stability of a one-piece narrow-diameter implant made of Ce-TZP-comp. Implant prototypes with a narrow (3. Read More

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Two-Year Follow-Up of 4-mm-Long Implants Used as Distal Support of Full-Arch FDPs Compared to 10-mm Implants Installed after Sinus Floor Elevation. A Randomized Clinical Trial.

Int J Environ Res Public Health 2021 04 6;18(7). Epub 2021 Apr 6.

Department of Biomedical and Neuromotor Science, University of Bologna, 40126 Bologna, Italy.

Background: In edentulous patients, bone resorption cannot allow the installation of standard implants and it is demanded to use short implants in the residual alveolar bone or longer implants in grafted bone.

Aim: To compare the survival and bone level changes of standard plus short 4-mm implants used as distal support of a maxillary full-arch fixed dental prostheses (FDPs) with standard (10-mm) implants placed in association with a bilateral sinus floor augmentation procedure.

Material And Methods: Full-arch FDPs supported by six implants were randomly placed in both groups. Read More

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One-Year Results Assessing the Performance of Prosthetic Rehabilitations in the Posterior Maxilla Supported by 4-mm Extrashort Implants Splinted to 10-mm Implants: A Prospective Case Series.

Int J Oral Maxillofac Implants 2021 Mar-Apr;36(2):371-378

Purpose: The aim of this study was to evaluate the survival and success rates of oral rehabilitations in a shortened maxillary dental arch and expanded maxillary sinus with 4-mm extrashort implants splinted to longer ones.

Materials And Methods: One 10-mm and one/two extrashort 4-mm titanium-zirconium SLActive tissue-level dental implants were inserted into 11 patients with limited vertical bone availability due to an expanded maxillary sinus antrum. Immediately and 6 months after insertion, implant stability resonance frequency analysis (RFA) values were assessed with an Osstell device. Read More

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Treating cuff tear arthropathy by reverse total shoulder arthroplasty: do the inclination of the humeral component and the lateral offset of the glenosphere influence the clinical and the radiological outcome?

Eur J Orthop Surg Traumatol 2021 Apr 20. Epub 2021 Apr 20.

Orthopedic Practice Clinic (OPPK), Schuerbusch 55, 48143, Münster, Germany.

Purpose: Reverse total shoulder arthroplasty is widely used for the treatment of cuff tear arthropathy. Standard implants consist of a humeral component with an inclination angle of 155° and a glenosphere without lateral offset. Recently, lower inclination angles of the humeral component as well as lateralized glenospheres are implanted to provide better rotation of the arm and to decrease the rate of scapular notching. Read More

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Femoral Stem Subsidence and its Associated Factors after Cementless Bipolar Hemiarthroplasty in Geriatric Patients.

Malays Orthop J 2021 Mar;15(1):63-71

Department of Radiology, Universitas Airlangga, Surabaya, Indonesia.

Introduction: Early femoral stem subsidence has been a concern as a predictor of the beginning of implant loosening, especially on cementless hip arthroplasty implants. This study aimed to determine the factors that affect femoral stem subsidence and outcome following hemiarthroplasty in the geriatric population.

Materials And Methods: This is a retrospective study of 179 patients who underwent cementless bipolar hemiarthroplasty during the 2011-2019 period at an orthopaedic and traumatology hospital. Read More

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Computational method for bearing surface wear prediction in total hip replacements.

J Mech Behav Biomed Mater 2021 07 8;119:104507. Epub 2021 Apr 8.

School of Engineering, Liverpool John Moores University, Byrom Street, Liverpool, L3 3AF, UK.

Total hip replacement (THR) is a revolutionary treatment when a hip joint becomes severely damaged. Wear is known as one of the main reasons for THR failure. Current experimental techniques to investigate the wear at the bearing surfaces of THRs are time-consuming, complicated and expensive. Read More

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Use of a novel Screen-Enrich-Combine(-biomaterials) Circulating System to fill a 3D-printed open Ti6Al4V frame with mesenchymal stem cells/β-tricalcium phosphate to repair complex anatomical bone defects in load-bearing areas.

Ann Transl Med 2021 Mar;9(6):454

Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.

Background: Repairing complex anatomical load-bearing bone defects is difficult because it requires the restoration of the load-bearing function, reconstructing the anatomical shape, and repair by regenerated bone. We previously developed a Screen-Enrich-Combine(-biomaterials) Circulating System (SECCS) for rapid intraoperative enrichment of autologous bone marrow mesenchymal stem cells (MSCs) to enhance the osteogenic ability of porous bone substitutes. In this study, we prepared a 3D-printed Ti6A14V macroporous frame matching the defect shape to provide early load-bearing support and evaluated the efficacy of filling the frame with SECCS-processed MSCs/beta tricalcium phosphate (β-TCP) for long-term bone growth. Read More

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Influence of Implant Dimensions in the Resorbed and Bone Augmented Mandible: A Finite Element Study.

Contemp Clin Dent 2020 Oct-Dec;11(4):336-341. Epub 2020 Dec 20.

Department of Biomedical Sciences, Faculty of Medical Bioengineering, University of Medicine and Pharmacy "Grigore T. Popa", Iasi, Romania.

Aims: The scope of this study was to analyze the influence of clinically feasible implant diameter and length on the stress transmitted to the peri-implant bone in the case of a resorbed and bone augmented mandible through finite element analysis.

Settings And Design: The study was carried out .

Subjects And Methods: Resorbed and bone-augmented 3D models were derived from cone-beam computed tomography scans of the same patient. Read More

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December 2020