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Dental implant surface

Sidónio C Freitas, Alejandra Correa-Uribe, M Cristina L Martins, Alejandro Pelaez-Vargas
Implant-based therapy is a mature approach to recover the health conditions of patients affected by edentulism. Thousands of dental implants are placed each year since their introduction in the 80s. However, implantology faces challenges that require more research strategies such as new support therapies for a world population with a continuous increase of life expectancy, to control periodontal status and new bioactive surfaces for implants. The present review is focused on self-assembled monolayers (SAMs) for dental implant materials as a nanoscale-processing approach to modify titanium surfaces...
2018: International Journal of Dentistry
Bruno Tochetto Primo, Leonardo Marcos Mezzari, Luís Carlos da Fontoura Frasca, Raquel Linderman, Elken Gomes Rivaldo
PURPOSE: To evaluate and compare the clinical and radiographic outcomes of mandibular rehabilitation with fixed prostheses on three implants with immediate versus delayed loading. MATERIALS AND METHODS: The sample comprised 21 patients who underwent treatment with immediate loading and 23 who received delayed loading. All had worn their prostheses for at least 18 months. Radiographic evaluation of bone loss was carried out in Adobe Photoshop CS5 by a single calibrated examiner using digitized panoramic radiographs...
March 15, 2018: International Journal of Oral & Maxillofacial Implants
Toru Takagi, Akira Aoki, Shizuko Ichinose, Yoichi Taniguchi, Noriko Tachikawa, Takeshi Shinoki, Walter Meinzer, Anton Sculean, Yuichi Izumi
BACKGROUND: Recently, the occurrence of peri-implantitis has been increasing. However, a suitable method to debride the contaminated surface of titanium implants has not been established. The aim of this study was to investigate the morphological changes of the microstructured fixture surface after erbium laser irradiation, and to clarify the effects of the erbium lasers when used to remove calcified deposits from implant fixture surfaces. METHODS: In experiment 1, sandblasted, large grit, acid etched surface implants were treated with Er:YAG laser or Er,Cr:YSGG laser at 30-60 mJ/pulse and 20 Hz with water spray...
March 13, 2018: Journal of Periodontology
David Anssari Moin, Bassam Hassan, Daniel Wismeijer
PURPOSE: To evaluate the feasibility of a commercially available immediate root analog implant system Replicate (Natural Dental Implants). MATERIALS AND METHODS: Five consecutive patients in need of an implant in the premolar region were recruited for this pilot study. Following clinical examination, a cone beam computed tomography scan was made and the dental impressions digitized. On the basis of the superimposition of these datasets, a three-dimensional (3D) envelope was created for the selected tooth...
March 2018: International Journal of Oral & Maxillofacial Implants
Renzo Guarnieri, Maurizio Grande, Francesco Zuffetti, Tiziano Testori
PURPOSE: To retrospectively evaluate the incidence of peri-implant mucositis and peri-implantitis around dental implants with the same body design and surface but different collar surface (laser-microgrooved vs not laser-microgrooved) after 5 years of loading in private practice patients. MATERIALS AND METHODS: The study was carried out on patients at a private dental clinic enrolled in a periodontal maintenance program, who received at least one implant with a laser-microgrooved collar surface and one implant without a laser-microgrooved collar surface...
March 2018: International Journal of Oral & Maxillofacial Implants
Zeev Ormianer, Jonathan Block, Shlomo Matalon, Jerry Kohen
PURPOSE: The objective of this study was to assess whether long-term implant survival rates and bone loss in patients with moderately controlled type 2 diabetes is similar to the rates reported in the nondiabetic population. MATERIALS AND METHODS: This retrospective observational study utilized patient medical records from a general practitioner's dental office. The records of patients who had moderately controlled type 2 diabetes with hemoglobin A1C (HbA1c) up to 8% and glucose level below 150 mg/dL were reviewed, as patients with HbA1c up to 7% are considered to be well-controlled type 2 diabetes...
March 2018: International Journal of Oral & Maxillofacial Implants
Valessa F Carvalho, Priscilla Bf Soares, Crisnicaw Verissimo, Roberto S Pessoa, Antheunis Versluis, Carlos J Soares
PURPOSE: The purpose of this study was to evaluate mouthguard shock absorption ability, strain, and stress generation during impact on dental implants placed in the anterior maxilla. The mouthguard material was also characterized. MATERIALS AND METHODS: Sixty experimental models were created and divided into six groups (n = 10): implant type, external hexagon (EH) and Morse taper (MT); without and with two mouthguards (MTG), EVA custom-fitted (Ct-MTG) and standard self-adapted (St-MTG)...
March 2018: International Journal of Oral & Maxillofacial Implants
William Becker, Philippe Hujoel, Burton E Becker
BACKGROUND: Numerous studies indicate implants placed immediately after extraction or with minimally invasive procedures have excellent long-term success and survival rates. There is general agreement that implants must be stable after implant placement. This study evaluated implant stability changes from the time of implant placement to second stage (prior to restoration). Resonance frequency analysis (RFA) was determined for two commercially available units (Osstell, Osstell USA, Columbia, MD and Penguin, Penguin Integration Diagnostics, Sweden)...
March 13, 2018: Clinical Implant Dentistry and related Research
Jason C Marvin, Silvia I Gallegos, Shaida Parsaei, Danieli C Rodrigues
PURPOSE: To evaluate the biocompatibility of five dental cement compositions after directly exposing human gingival fibroblast (HGF) and MC3T3-E1 preosteoblast cells to cement alone and cement applied on commercially pure titanium (cpTi) specimens. MATERIALS AND METHODS: Nanostructurally integrated bioceramic (NIB), resin (R), resin-modified glass ionomer (RMGIC), zinc oxide eugenol (ZOE), and zinc phosphate (ZP) compositions were prepared according to the respective manufacturer's instructions...
March 9, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Craig L Sikora, Maria F Alfaro, Judy Chia-Chun Yuan, Valentim A Barao, Cortino Sukotjo, Mathew T Mathew
PURPOSE: Dental implants have been shown to have predictable success, but esthetic complications often arise. To reduce tissue shadowing from titanium, zirconia abutments may be used; however, the literature suggests that the use of zirconia leads to greater destruction of the implant interface that may result in biological complications such as titanium tattoos and heavy metal toxicity. Previous studies have examined the mechanical aspects of this implant/abutment relationship, but they have not accounted for the corrosive degradation that also takes place in the dynamic environment of the oral cavity...
March 9, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
Ranran Zhang, Xujie Liu, Zhiyuan Xiong, Qianli Huang, Xing Yang, Hao Yan, Jing Ma, Qingling Feng, Zhijian Shen
Micro/nanostructured TiO2 /ZnO coating has been shown to possess multiple functions, including antibacterial activity and bioactivity. Osteoblast-like SaOS-2 cells were employed for evaluating the in vitro osteogenic capacity of this coating and positive results were obtained. However, traditional principles of osseointegration focus only on the osteogenic differentiation alone. The effects of immunomodulation on the osteogenic activity have been largely ignored. In this study, the inflammatory responses of macrophages on the micro/nanostructured TiO2 /ZnO coating were investigated...
March 8, 2018: Artificial Cells, Nanomedicine, and Biotechnology
Daniele Botticelli, Vittoria Perrotti, Adriano Piattelli, Giovanna Iezzi
The aim of the present study was a histologic and histomorphometric analysis of the peri-implant tissue reactions and of the bone-titanium interface in successfully osseointegrated, clinically stable, and immobile retrieved titanium dental implants after a long loading period. Four successfully osseointegrated and stable implants with a sandblasted surface were retrieved from a patient due to fracture, two after 14 years of loading and two after 17 years. None of these implants has been previously reported...
March 7, 2018: International Journal of Periodontics & Restorative Dentistry
Nilay Er, Alper Alkan, Serim İlday, Erman Bengu
Dental implant drilling procedure is an essential step for implant surgery and frictional heat appeared in bone during drilling is a key factor affecting the success of an implant. The aim of this study is to increase the dental implant drill lifetime and performance using heat- and wear-resistant protective coatings hence to decrease the alveolar bone temperature caused by the dental implant drilling procedure. Commercially obtained stainless steel drills were coated with titanium aluminum nitride, diamond-like carbon, titanium boron nitride, and boron nitride coatings via magnetron-sputter deposition...
March 2, 2018: Journal of Oral Implantology
Kaoru Washio, Yusuke Tsutsumi, Yuka Tsumanuma, Kosei Yano, Supreda Suphanantachat Srithanyarat, Ryo Takagi, Shizuko Ichinose, Walter Meinzer, Masayuki Yamato, Teruo Okano, Takao Hanawa, Isao Ishikawa
Osseointegrated implants have been recognized as being very reliable and having long term predictability. However, host-defense mechanisms against infection have been known to be impaired around a dental implant because of the lack of a periodontal ligament (PDL). The purpose of our experimental design was to produce cementum and PDL on the implant surface adopting cell sheet technology. To this aim we used PDL-derived cells, which contain multi-potential stem cells, as the cell source and we cultured them on an implant material constituted of commercially pure titanium treated with acid etching, blasting, and a calcium phosphate (CaP) coating to improve cell attachment...
March 1, 2018: Tissue Engineering. Part A
Lorenzo Bevilacqua, Annalisa Milan, Veronica Del Lupo, Michele Maglione, Lucilla Dolzani
Microbial biofilms developed on dental implants play a major role in perimplantitis' pathogenesis. Many studies have indicated that surface roughness is the main feature favoring biofilm development in vitro, but its actual influence in vivo has still to be confirmed. In this study, the amount of biofilm formed on differently treated titanium surfaces, showing distinct roughness, has been examined both in vivo and in vitro by Confocal Laser Scanning Microscopy. In vitro studies availed of biofilm developed by Pseudomonas aeruginosa or by salivary bacteria from volunteer donors...
February 27, 2018: Current Microbiology
Masazumi Yoshitani, Yoshiyuki Takayama, Atsuro Yokoyama
BACKGROUND: Dental implants are frequently applied to unilateral defects in the mandible. However, implant placement in the molar region of the mandible can be difficult due to anatomical structure. The aim of this study was to evaluate the distribution of occlusal force in a mandibular shortened dental arch (SDA) with implants. METHODS: Three-dimensional finite element (FE) models of the mandible with varying numbers of teeth and implants were constructed. Models Im6 and Im67 contained one and two implants in the defect of the left molar region, respectively...
February 27, 2018: International Journal of Implant Dentistry
J Y Liu, F Chen, Y J Ge, L Wei, S X Pan, H L Feng
OBJECTIVE: To evaluate the influence of the rough surface of dental implants prepared by selective laser melting (SLM) on early bone healing around titanium implants. METHODS: A total of sixteen titanium implants were involved in our research, of which eight implants were prepared by SLM (TIXOS Cylindrical, Leader-Novaxa, Milan, Italy; 3.3 mm×10 mm, internal hex) and the other eight were sandblasted, large-grit and acid-etched (SLA) implants (IMPLUS Cylindrical, Leader-Novaxa, Milan, Italy; 3...
February 18, 2018: Beijing da Xue Xue Bao. Yi Xue Ban, Journal of Peking University. Health Sciences
Vivian Wu, René F M van Oers, Engelbert A J M Schulten, Marco N Helder, Rommel G Bacabac, Jenneke Klein-Nulend
Bone mass is important for dental implant success and is regulated by mechanoresponsive osteocytes. We aimed to investigate the relationship between the levels and orientation of tensile strain and morphology and orientation of osteocytes at different dental implant positions in the maxillary bone. Bone biopsies were retrieved from eight patients who underwent maxillary sinus-floor elevation with β-tricalcium phosphate prior to implant placement. Gap versus free-ending locations were compared using 1) a three-dimensional finite-element model of the maxilla to predict the tensile strain magnitude and direction and 2) histology and histomorphometric analyses...
February 26, 2018: International Journal of Oral Science
E Velasco-Ortega, E Wojtovicz, A España-Lopez, A Jimenez-Guerra, L Monsalve-Guil, I Ortiz-Garcia, M-A Serrera-Figallo
BACKGROUND: The aim of this prospective study was to report the outcome of treatment with implants inserted after tooth extraction and immediately loaded. MATERIAL AND METHODS: Fifty-six patients with single tooth loss were treated with 116 IPX Galimplant® implants with internal connections and a sandblasted, acid-etched surface. All implants were placed after tooth extraction using a flapless approach without bone regeneration, and they were then immediately loaded with cemented acrylic prostheses...
February 24, 2018: Medicina Oral, Patología Oral y Cirugía Bucal
Hamid Neshandar Asli, Zahra Dalili Kajan, Fatemeh Gholizade
STATEMENT OF PROBLEM: Cement-retained implant-supported restorations have advantages over screw-retained restorations but are difficult to retrieve. Identifying the approximate location of the screw access hole (SAH) may reduce damage to the prosthesis. PURPOSE: The purpose of this in vitro study was to evaluate the ability of cone beam computed tomography (CBCT) imaging to determine the location and direction of SAHs in cement-retained implant prostheses. MATERIAL AND METHODS: Five clear acrylic resin casts were made based on a mandibular model...
February 21, 2018: Journal of Prosthetic Dentistry
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