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Implant Dentistry

Renato Sussumu Nishioka, Leandro Ruivo De Santis, Gabriela Nogueira De Melo Nishioka, Alberto Noriyuki Kojima, Francisley Ávila Souza
PURPOSE: This in vitro study assessed the accuracy of multiple implant-level impression techniques (open tray and closed tray) for the fabrication of 3-unit implant prostheses with strain gauge (SG) analysis. MATERIALS AND METHODS: A polyurethane master model was designed to simulate a clinical situation. Two rigid custom trays were fabricated for the model. The impression material used was polysulfide. Transfer implant impressions were made using 2 techniques; ten tapered copings not splinted (custom closed tray) and ten square copings splinted with acrylic-resin (custom open tray)...
March 9, 2018: Implant Dentistry
Gustavo Assis de Paula, Guilherme Carvalho Silva, Ênio Lacerda Vilaça, Tulimar Machado Cornacchia, Cláudia Silami de Magalhães, Allyson Nogueira Moreira
PURPOSE: Biomechanical behavior of tooth-implant-supported prostheses (TISPs) with external and internal implants was compared. MATERIALS AND METHODS: Two 3-D models of TISP were designed by varying the implant: external (Model EH) and internal hexagons (Model IH). After loading, von Mises stresses were obtained in implants, abutments, and screws. Principal maximum (σmax) and minimum (σmin) stresses were analyzed in periodontal ligament (PL), alveolar bone, and periimplant bone...
March 7, 2018: Implant Dentistry
Hakan Arinc
PURPOSE: To evaluate the effects of prosthetic material on the degree of stress to the cortical bone, trabecular bone, framework, and implants using finite element analysis (FEA). MATERIALS AND METHODS: A mandibular implant-supported fixed prosthesis was designed. Different prosthetic materials [cobalt-chromium-supported ceramic, zirconia-supported ceramic, and zirconia-reinforced polymethyl methacrylate (ZRPMMA)-supported resin] were used. FEA was used to evaluate stress under different loading conditions...
March 5, 2018: Implant Dentistry
Abbas Monzavi, Reza Fekrazad, Zahra Chinipardaz, Sima Shahabi, Roohollah Behruzi, Nasim Chiniforush
PURPOSE: This study aimed to investigate and compare temperature change during implant decontamination with different laser types (carbon dioxide [Co2]/diode/neodymium-doped yttrium aluminum garnet [Nd:YAG]/erbium-doped yttrium aluminum garnet [Er:YAG]/antimicrobial photodynamic therapy [aPDT]). MATERIAL AND METHODS: Sixty implants were inserted into a bone block cut from a sheep's mandible. A 3 × 8 mm vertical lesion was made at the buccal of each implant. The bone block was placed into a 37°C water bath to simulate the in vivo oral condition...
February 27, 2018: Implant Dentistry
Patrícia Medeiros Araújo, Guenther Schuldt Filho, Cimara Fortes Ferreira, Cesar Augusto Magalhães Benfatti, David Richard Cagna, Marco Aurélio Bianchini
OBJECTIVES: The present retrospective study assessed the clinical performance of abutment screws from prefabricated metal abutments and compared technical complication rates between straight and angled abutments. MATERIALS AND METHODS: Dental charts were selected for patients with dental implant rehabilitations delivered between 1998 and 2012. Abutment angulation, prosthetic screw type, and presence of complications that occurred during the selected time period were collected...
February 27, 2018: Implant Dentistry
David French, Hannu Larjava, Marco Tallarico
INTRODUCTION: To evaluate risk indicators associated with implant failure and relationship between bone levels and soft-tissue health of anodized implants placed in private practice. MATERIAL AND METHODS: Partially or completely edentulous patients who received an anodized implant between 2003 and 2013 were included. Univariate and multivariate analysis was used to identify the relationship between study variables and implant failure. Mean marginal bone level changes (MBLΔ) were assessed using periapical radiographs...
February 26, 2018: Implant Dentistry
Shin Kasuya, Nahoko Kato-Kogoe, Michi Omori, Kayoko Yamamoto, Shogo Taguchi, Hiroshi Fujita, Naoko Imagawa, Akihiro Sunano, Kazuya Inoue, Yuichi Ito, Azumi Hirata, Takaaki Ueno, Peter K Moy
PURPOSE: We carried out guided bone regeneration of cranial bone defects in rats using the bovine bone substitute Bio-Oss and a collagen membrane and performed histological observations of the bone repair process. MATERIALS AND METHODS: Bone defects were created in the cranial bones of 30 15-week-old Sprague-Dawley rats. We made 3 groups. A is unfilled, B is Bio-Oss, and C is Bio-Oss plus a collagen membrane. At 4 or 8 weeks postoperatively, tissue samples were taken...
February 26, 2018: Implant Dentistry
Dennis P Tarnow
No abstract text is available yet for this article.
February 23, 2018: Implant Dentistry
Gustavo Da Dos Santos Pinto, Suzane Cristina Pigossi, Tércio Pessoa, Lélis Gustavo Nícoli, Raphael Ferreira de Souza Bezerra Araújo, Cláudio Marcantonio, Elcio Marcantonio
PURPOSE: The aim of this case report was to demonstrate the repair of a large sinus membrane perforation related to a sinus floor augmentation procedure, using leukocyte platelet-rich fibrin (L-PRF), for subsequent rehabilitation of a partially edentulous patient. MATERIALS AND METHODS: The patient presented the absence of teeth numbers 18, 17, and 16, associated with insufficient bone height because of the maxillary sinus pneumatization. A maxillary inlay bone graft was proposed, however, during the sinus floor augmentation procedure, a large portion of the sinus membrane was ruptured...
February 16, 2018: Implant Dentistry
Zvonimir Katic, Tomislav Jukic, David Stubljar
AIM: To compare temperatures of the crestal bone during implant site preparation for different osteotomy lengths and implant systems. METHODS: Bovine ribs were used to simulate the cortical bone of the human mandible. Three different implant systems were tested: Astra Tech, Ankylos, and XiVE. Six drills per system were performed, meaning each drilling set was used for 2 drills per 3 osteotomy lengths (8, 12, and 16 mm). Drilling force, drilling speed, drilling length, and temperature were recorded...
February 13, 2018: Implant Dentistry
Neda Moslemi, Vahid Khoshkam, Sahar Rafiee, Naghmeh Bahrami, Hoori Aslroosta
PURPOSE: The main focused question of this systematic review was as follows: Does the application of recombinant human bone morphogenetic protein-2 (rhBMP-2) placed in extraction sockets reduce the alveolar ridge changes? METHODS: A systematic literature search was performed up to February 2017. Clinical studies published in English were included. Outcome variables of interest were as follows: changes in alveolar ridge width and height, the quality of new bone, patient's safety, adverse events, and postoperative complications...
February 1, 2018: Implant Dentistry
Xian Zhou, Xiulian Hu, Ye Lin
PURPOSE: The objective was to prepare tantalum (Ta)-coated sandblasted and acid-etched (SLA) dental implants using vacuum plasma spraying (VPS) and to analyze their morphologies. MATERIALS AND METHODS: Twelve SLA implants were coated with Ta using VPS. The topographies of the coatings and Ta/SLA surface interfaces were examined using scanning electron microscopy. The thickness at 4 locations for 6 Ta-coated and 6 uncoated SLA implants and pore sizes of the neck, central, and root areas of Ta-coated implants were measured...
January 30, 2018: Implant Dentistry
Samir Aboul-Hosn Centenero, Aída Lázaro, Maria Giralt-Hernando, Federico Hernández-Alfaro
PURPOSE: The aim of this study was to systematically review and compare the survival rates (SRs) of oral rehabilitations performed with 2 zygomatic implants (ZIs) combined with regular implants (RIs) versus 4 ZI. MATERIAL AND METHODS: An electronic search was performed in several databases for articles published in English between 2007 and 2015. Articles reporting human studies were included in this systematic review. RESULTS: The search yielded to a total of 417 studies, of which 6 were included in this study...
January 29, 2018: Implant Dentistry
Corlene Schnetler, Vladimir S Todorovic, Andre W van Zyl
INTRODUCTION: The anterior mandible is generally regarded as a safe anatomical region for implant placement. However, anatomical variations may lead to severe intraoperative complications with potential fatal outcome. The objective of this study was to evaluate the anterior mandibular lingual defect (AMLD) in patients undergoing implant surgery. MATERIALS AND METHODS: The CT data of 338 consecutive dental implant patients were reformatted with appropriate software...
January 24, 2018: Implant Dentistry
Sergio V Kellesarian, Fawad Javed, Georgios E Romanos
OBJECTIVE: The past few years have seen a progressive increment in the number of osteomyelitis cases associated with dental implants, raising the interest of a possible role of implant therapy in the development of osteomyelitis. The aim of the present study was to systematically review the association between dental implant therapy and occurrence of osteomyelitis. DATA SOURCES: The focused question addressed was "What is the risk to develop osteomyelitis among patients receiving dental implants?" Indexed databases were searched without language restrictions up to January 2017 using various key words including: "osteomyelitis"; "dental implants"; "osseointegration"; and "risk factors...
January 17, 2018: Implant Dentistry
João Malta Barbosa, Daniel Navarro da Rocha, Ronaldo Hirata, Gileade Freitas, Estevam A Bonfante, Paulo G Coelho
PURPOSE: To evaluate the probability of survival and failure modes of different external hexagon connection systems restored with anterior cement-retained single-unit crowns. The postulated null hypothesis was that there would be no differences under accelerated life testing. MATERIALS AND METHODS: Fifty-four external hexagon dental implants (∼4 mm diameter) were used for single cement-retained crown replacement and divided into 3 groups: (3i) Full OSSEOTITE, Biomet 3i (n = 18); (OL) OEX P4, Osseolife Implants (n = 18); and (IL) Unihex, Intra-Lock International (n = 18)...
January 17, 2018: Implant Dentistry
Hyunjin Lee, Jong Young Lee, Dong-Ho Ha, Jee-Heon Jeong, Jun-Beom Park
PURPOSE: Valproic acid (VPA), a histone deacetylase inhibitor, has been shown to affect cell growth and differentiation in various in vitro and in vivo models. The aim of this study is to evaluate the effects of VPA on viability and osteogenic differentiation of mesenchymal stem cells derived from the human gingival tissue. MATERIALS AND METHODS: Stem cells derived from the gingiva were grown in the presence of VPA at concentrations ranging from 0.125 to 8 mM. Cell morphology was assessed on days 3, 5, and 7, and cell proliferation was analyzed on the same days using a Cell Counting Kit-8 (CCK-8)...
January 11, 2018: Implant Dentistry
Yasushi Nakajima, Adriano Piattelli, Giovanna Iezzi, Natalia Fortich Mesa, Mauro Ferri, Daniele Botticelli
OBJECTIVE: To evaluate the influence of the presence or absence of keratinized mucosa on hard and soft tissues around implants. MATERIAL AND METHODS: Sixteen volunteers with edentulous regions in the distal aspect of the mandible participated in the study. In each patient, 2 solid titanium screw-shaped devices, 3.5 mm in diameter and 5 mm long, were installed. The incision of the mucosa was performed in such a way to allow that, after the suture of the flaps, only the alveolar mucosa surround the test sites and the keratinized mucosa surround the control implants...
January 9, 2018: Implant Dentistry
Faris Younes, Aryan Eghbali, Thomas Goemaere, Thomas De Bruyckere, Jan Cosyn
OBJECTIVES: The aim of this systematic review is to assess patient-reported outcome measures (PROMs) after a sinus lift elevation by means of a lateral approach. MATERIAL AND METHODS: An electronic search was performed to search for eligible publications reporting PROMs after a lateral wall sinus lift procedure. Selected articles were further scrutinized and underwent a quality check before inclusion in a final study pool. RESULTS: The electronic search provided us with 2444 articles of which 98 were further examined through a full-text analysis...
January 9, 2018: Implant Dentistry
Allahyar Geramy, Sareh Habibzadeh
INTRODUCTION: This study was accomplished to assess the biomechanical state of splinting in implant-supported maxillary overdentures. MATERIALS AND METHODS: Two models of maxillary overdentures were designed in SolidWorks 2011. The first model included 4 separate implants and ball abutments, whereas the second one included 4 splinted implants connected with a bar. Evaluation was performed in ANSYS Workbench software with 200 N load applied at the molar-premolar region, bilaterally...
January 3, 2018: Implant Dentistry
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