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International Journal of Oral & Maxillofacial Implants

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https://www.readbyqxmd.com/read/28632257/modeling-of-crestal-bone-after-submerged-vs-transmucosal-implant-placement-a-systematic-review-with-meta-analysis
#1
Stefan Paul, Matthias Petsch, Ulrike Held
PURPOSE: To determine differences in marginal bone changes when using submerged or transmucosal dental implants through a systematic review of the literature. MATERIALS AND METHODS: PubMed, Embase, and the Cochrane Library were electronically searched for trials comparing marginal bone loss between submerged and transmucosal dental implants with a minimum follow-up of 12 months published between January 1980 and January 2016. Manual searches of the bibliographies of the included studies were also carried out...
June 20, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28632256/scanning-electron-microscopy-analysis-of-the-adaptation-of-single-unit-screw-retained-computer-aided-design-computer-aided-manufacture-abutments-after-mechanical-cycling
#2
Roberto Adrian Markarian, Deborah Pedroso Galles, Fabiana Mantovani Gomes França
PURPOSE: To measure the microgap between dental implants and custom abutments fabricated using different computer-aided design/computer-aided manufacture (CAD/CAM) methods before and after mechanical cycling. MATERIALS AND METHODS: CAD software (Dental System, 3Shape) was used to design a custom abutment for a single-unit, screw-retained crown compatible with a 4.1-mm external hexagon dental implant. The resulting stereolithography file was sent for manufacturing using four CAD/CAM methods (n = 40): milling and sintering of zirconium dioxide (ZO group), cobalt-chromium (Co-Cr) sintered via selective laser melting (SLM group), fully sintered machined Co-Cr alloy (MM group), and machined and sintered agglutinated Co-Cr alloy powder (AM group)...
June 20, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28632255/intake-of-proton-pump-inhibitors-is-associated-with-an-increased-risk-of-dental-implant-failure
#3
Bruno Ramos Chrcanovic, Jenö Kisch, Tomas Albrektsson, Ann Wennerberg
PURPOSE: To investigate the association between the intake of proton pump inhibitors (PPIs) and the risk of dental implant failure. MATERIALS AND METHODS: The present retrospective cohort study is based on patients consecutively treated between 1980 and 2014 with implant-supported/retained prostheses at one specialist clinic. Modern endosseous dental implants with cylindrical or conical design were included, and only complete cases were considered; ie, only those implants with information available for all variables measured were included in the regression model analysis...
June 20, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28632254/osteogenic-potential-of-gingival-mesenchymal-stem-cells-over-titanium-machined-surfaces
#4
Julio A Carrion, Junaid Rajani, Mohamed Al Bahrawy, Xiaojun Chan, Tae Jin Kim, Srinivas Myneni, Vincent J Iacono
PURPOSE: To evaluate the biochemical composition of bone nodules deposited by gingival mesenchymal stem cells (GMSCs) over titanium machined surfaces in vitro. MATERIALS AND METHODS: GMSCs were isolated from healthy gingival tissues of patients undergoing crown-lengthening surgical procedures. GMSCs were characterized following the International Society for Cellular Therapy guidelines. After incubation of the GMSCs with titanium discs, osteogenic differentiation was induced for 28 days...
June 20, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28632253/accuracy-of-implant-placement-with-computer-guided-surgery-a-systematic-review-and-meta-analysis-comparing-cadaver-clinical-and-in-vitro-studies
#5
Fernando Bover-Ramos, José Viña-Almunia, Juan Cervera-Ballester, Miguel Peñarrocha-Diago, Berta García-Mira
PURPOSE: The aim of this systematic review was to analyze the accuracy of implant placement using computer-guided surgery and to compare virtual treatment planning and outcome in relation to study type (in vitro, clinical, or cadaver). A further objective was to compare the accuracy of half-guided implant surgery with that of full-guided implant surgery. MATERIALS AND METHODS: A PubMed search was performed to identify studies published between January 2005 and February 2015, searching the keywords "reliability AND dental implant planning" and "accuracy dental implant planning...
June 20, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28618434/alveolar-ridge-augmentation-using-dystopic-autogenous-tooth-2-year-results-of-an-open-prospective-study
#6
Veronika Pohl, Sebastian Pohl, Irene Sulzbacher, Rudolf Fuerhauser, Georg Mailath-Pokorny, Robert Haas
PURPOSE: To evaluate the use of chemically unchanged tooth material in lateral alveolar ridge augmentation or for the filling of jaw defects. MATERIALS AND METHODS: A total of 20 patients underwent either lateral augmentation of the alveolar process (11 patients) or filling of jaw defects (6 patients) with autogenous unaltered tooth material in a longitudinal 2-year study. In three patients, the jaw defect was so marked that a bone block graft had to be used for augmentation in addition to particulate dental material...
June 14, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28618433/crestal-sinus-augmentation-with-recombinant-human-bone-morphogenetic-protein-2-clinical-and-radiographic-outcomes-of-2-year-pilot-trial
#7
Ulrike Kuchler, Claudia M Rudelstorfer, Barbara Barth, Gabor Tepper, Dominika Lidinsky, Patrick Heimel, Georg Watzek, Reinhard Gruber
PURPOSE: Recombinant human bone morphogenetic protein 2 (rhBMP-2) together with an absorbable collagen carrier (ACS) was approved for augmentation of the maxillary sinus prior to implant placement. The original registration trial was based on a lateral window approach. Clinical outcomes of crestal sinus augmentation with rhBMP-2 have not been reported so far. MATERIALS AND METHODS: An uncontrolled pilot trial in which seven patients with a residual maxillary height below 5 mm were enrolled to receive crestal sinus augmentation with rhBMP-2/ACS was conducted...
June 14, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28618432/accuracy-of-digital-vs-conventional-implant-impression-approach-a-three-dimensional-comparative-in-vitro-analysis
#8
Kinga Basaki, Hasan Alkumru, Grace De Souza, Yoav Finer
PURPOSE: To assess the three-dimensional (3D) accuracy and clinical acceptability of implant definitive casts fabricated using a digital impression approach and to compare the results with those of a conventional impression method in a partially edentulous condition. MATERIALS AND METHODS: A mandibular reference model was fabricated with implants in the first premolar and molar positions to simulate a patient with bilateral posterior edentulism. Ten implant-level impressions per method were made using either an intraoral scanner with scanning abutments for the digital approach or an open-tray technique and polyvinylsiloxane material for the conventional approach...
June 14, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28520823/comparison-of-tunnel-and-crestal-incision-techniques-in-reconstruction-of-localized-alveolar-defects
#9
Nur Altiparmak, Sina Uckan, Burak Bayram, Sıdıka Soydan
PURPOSE: The aim of this study was to compare the complication rates of recipient sites prepared using two incision techniques: crestal and tunnel. MATERIALS AND METHODS: In this prospective study, patients underwent augmentation procedures (68 patients; 75 sites) by the same surgeon that were performed consecutively using the crestal incision technique (27 horizontal, 10 vertical; crestal group) or the tunnel incision technique (27 horizontal, 11 vertical; tunnel group)...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28518187/in-vitro-shock-absorption-tests-on-implant-supported-crowns-influence-of-crown-materials-and-luting-agents
#10
Martin Rosentritt, Sibylle Schneider-Feyrer, Michael Behr, Verena Preis
PURPOSE: To investigate the force absorption capacity of implant-supported crowns made of different restorative materials and connected to abutments with different luting agents. MATERIALS AND METHODS: Molar crowns were milled of different computer-aided design/computer-aided manufacture materials (n = 8 crowns per material): polymethyl methacrylate, polyether ether ketone, composite, lithium disilicate, titanium, and zirconia. Crowns were mounted on titanium implant replicas using different luting agents: uncemented, temporarily cemented (zinc oxide-eugenol cement), conventionally cemented (zinc oxide phosphate cement), and adhesively bonded...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28518186/molecular-activity-and-osseointegration-after-single-dose-irradiation-an-in-vivo-study
#11
Jan Nyberg, Gisela Helenius, Christer Dahlin, Carina B Johansson, Omar Omar
PURPOSE: Irradiation results in deleterious effects on bone healing and integration of titanium implants. The impact of irradiation on osseointegration has been demonstrated in histologic studies, but the underlying molecular mechanisms have not been explored. This study aimed to investigate the effects of single-dose irradiation on the expression of biologic mediators crucial for inflammation, bone formation, and bone remodeling and to relate these molecular activities to implant stability after a 5-week healing period...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28518185/osteogenic-potential-of-adipose-derived-macrospheroids-cocultured-with-cd11b-monocytes
#12
Hidemi Nakata, Maiko Yamamoto, Emi Okada, Tomoko Nagayama, Munemitsu Miyasaka, Shohei Kasugai, Shinji Kuroda
PURPOSE: Among potential cell-based therapies, adipose-derived stem cells (ASCs) have been proposed as a promising source of stem cells for tissue regeneration. Although many recent clinical trials have investigated the use of adipose tissue or ASCs in transplantation, analysis of the microstructures of outgrowing macrosized spheroids (macrospheroids) or three-dimensional coculture of ASC spheroids and monocyte/macrophage lineages has not been performed. The aim of this study was to analyze the microstructures of murine-derived ASC macrospheroids and the growth and osteogenic potential of these macrospheroids in a three-dimensional environment and after calcification induction by coculture with monocytes...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28518184/a-method-for-minimizing-rotational-errors-of-implant-prostheses
#13
Hyeonjong Lee, Kung-Rock Kwon, Janghyun Paek, Ahran Pae, Kwantae Noh
PURPOSE: Rotational errors of implants can occur during two stages: when connecting impression copings with implants, and when connecting impression copings with analogs. The aim of this study was to determine ways to minimize these rotational errors. MATERIALS AND METHODS: Three types of implants were prepared: a tissue-level implant with an internal octagon 8-degree Morse taper connection, a bone-level implant with an internal hex 11-degree Morse taper connection, and a bone-level implant with an external hex connection...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28518183/preclinical-evaluation-of-a-crown-splinted-custom-root-shaped-implant
#14
Elias D Kontogiorgos, Poorva Gharpure, Eberechukwu O Iheanacho, Christopher J Gonzales, Lynne A Opperman
OBJECTIVE: To test whether a Maryland bridge-type splint provides adequate stability for a custom root-shaped implant to osseointegrate in a manner substantially equivalent to that of a threaded implant. METHODS: Six beagle dogs were subjected to intraoral impressions and cone beam scans that were used to fabricate custom root-shaped implants (RTIs) and crowns. Premolars in the mandible (P4) and in the maxilla (P3) were extracted, and 24 RTIs were immediately placed in extraction sockets...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28518182/triple-layered-closure-of-an-oroantral-fistula-a-case-report
#15
Eric George
Oroantral fistulae (OAF) are surgical sequelae that require complete resection and often leave large defects for the surgeon to repair. Closing these lesions is often technique sensitive and requires a detailed protocol, which, if not adhered to, can lead to recurrence. This case report presents a combined approach to closing an OAF by first excising the fistula and then resecting to retrieve the buccal fat pad to form a pedicle graft over the wound site. Next, a platelet-rich fibrin membrane is sandwiched over the buccal fat pad and completely covered by a buccal advancement flap...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28518181/a-semi-automatic-algorithm-for-preliminary-assessment-of-labial-gingiva-and-alveolar-bone-thickness-of-maxillary-anterior-teeth
#16
Sheng-Hung Chen, Hsun-Liang Chan, Yongning Lu, Sim-Heng Ong, Hom-Lay Wang, Eng Hong Ko, Po-Chun Chang
PURPOSE: Soft and hard tissue volumes are critical for implant placement and long-term stability. Although the literature has adequately addressed tissue biotypes of Western populations, pertinent information about Asian populations is limited. This study aimed to evaluate the soft and hard tissue profiles of the maxillary anterior teeth of the Taiwanese population using a semi-automatic algorithm. MATERIALS AND METHODS: Cone beam computed tomography images of 11 adults with well-aligned maxillary anterior teeth were overlaid with those of cast models, based on the tooth crowns manually outlined by two independent observers...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28518180/the-effects-of-laser-with-different-parameters-and-crosshatching-on-fibroblast-adhesion-and-proliferation-to-implant-surfaces
#17
Hakki Çelebi, Pembegül Uyar Arpacı, Ilhami Çelik, Serhan Akman
PURPOSE: To compare the adhesion and proliferation effect of HGF-1 cells on pure titanium disks when the surfaces are unprocessed (machined surfaces after slicing) or modified with a laser. MATERIALS AND METHODS: Twenty-eight titanium disks were divided into four groups. Three surface topographies were created using an erbium fiber laser: group 1 (unidirectional application [no crosshatch]), group 2 (crosshatching in two directions), and group 3 (crosshatching in three directions)...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28518179/cleaning-disinfection-and-sterilization-protocols-employed-for-customized-implant-abutments-an-international-survey-of-100-universities-worldwide
#18
Luigi Canullo, Marco Tallarico, Stephen Chu, David Pennarocha, Mutlu Özcan, Paolo Pesce
PURPOSE: American and European standards recommend sterilization of customized abutments before connecting them to implants, as customized abutments are considered semi-critical medical devices. Since standardized procedures could not be identified in the literature on implantology, this survey evaluated the protocols employed at different universities worldwide to clean, disinfect, and/or sterilize customized abutments before their connection to bone-level implants. MATERIALS AND METHODS: The survey took place between October 2015 and January 2016...
May 18, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28403249/accuracy-of-cone-beam-computed-tomography-grayscale-density-in-determining-bone-architecture-in-the-posterior-mandible-an-in-vivo-study-with-microcomputed-tomography-validation
#19
Feng Wang, Wei Huang, Yiqun Wu, Jesus Montanero-Fernandez, Rachel A Sheridan, Hom-Lay Wang, Alberto Monje
PURPOSE: The aim of this study was to analyze the reliability of cone beam computed tomography (CBCT) in assessing the grayscale density (GSD) of bone by comparing it with microcomputed tomography (μ-CT) data. MATERIALS AND METHODS: A total of 50 subjects with lost mandibular molars were included in the study. To assess the bone GSD, a previously fabricated template made of acrylic resin with a 2-mm-diameter metal rod was positioned, and CBCT was performed. The bone biopsies for μ-CT analysis were then obtained during implant surgery...
April 12, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28403247/early-complications-of-immediate-loading-in-edentulous-full-arch-restorations-a-retrospective-analysis-of-88-cases
#20
Iñaki Cercadillo-Ibarguren, Alba Sánchez-Torres, Rui Figueiredo, Eduard Valmaseda-Castellón
PURPOSE: To describe the clinical outcomes and complications related to provisional prostheses after full-arch implant-supported rehabilitation by means of an immediate loading protocol. MATERIALS AND METHODS: This retrospective cohort study included patients who were consecutively treated with full-arch implant-supported restorations with a minimum of four implants (Replace Select Tapered TiUnite, Nobel Biocare AB) per arch and conical abutments (multi-unit, Nobel Biocare AB) by means of an immediate loading protocol...
April 12, 2017: International Journal of Oral & Maxillofacial Implants
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