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External connection implant

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https://www.readbyqxmd.com/read/29770239/comparison-of-marginal-bone-loss-between-internal-and-external-connection-dental-implants-in-posterior-areas-without-periodontal-or-peri-implant-disease
#1
Dae-Hyun Kim, Hyun Ju Kim, Sungtae Kim, Ki-Tae Koo, Tae-Il Kim, Yang-Jo Seol, Yong-Moo Lee, Young Ku, In-Chul Rhyu
Purpose: The purpose of this retrospective study with 4-12 years of follow-up was to compare the marginal bone loss (MBL) between external-connection (EC) and internal-connection (IC) dental implants in posterior areas without periodontal or peri-implant disease on the adjacent teeth or implants. Additional factors influencing MBL were also evaluated. Methods: This retrospective study was performed using dental records and radiographic data obtained from patients who had undergone dental implant treatment in the posterior area from March 2006 to March 2007...
April 2018: Journal of Periodontal & Implant Science
https://www.readbyqxmd.com/read/29763496/comparison-of-marginal-bone-loss-between-implants-with-internal-and-external-connections-a-systematic-review
#2
Natalia Palacios-Garzón, Elisabeth Mauri-Obradors, Xavier Roselló-LLabrés, Albert Estrugo-Devesa, Enric Jané-Salas, José López-López
PURPOSE: The objective of this systematic review was to compare the loss of marginal bone between implants with internal and external connections by analyzing results reported in studies published after 2010. MATERIALS AND METHODS: A literature search in MEDLINE with the keywords "dental implant connections, external internal implant connection, bone loss implant designs, internal and external connection implant studies in humans" was conducted. Clinical trials on human beings, comparing both connections and published in English, from 2010 to 2016 were selected...
May 2018: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29761902/the-influence-of-implant-abutment-connection-to-peri-implant-bone-loss-a-systematic-review-and-meta-analysis
#3
REVIEW
Riccardo Caricasulo, Luciano Malchiodi, Paolo Ghensi, Giuliano Fantozzi, Alessandro Cucchi
PURPOSE: Different implant-abutment connections are available and it has been claimed they could have an effect on marginal bone loss. The aim of this review is to establish if implant connection configuration influences peri-implant bone loss (PBL) after functional loading. METHODS: A specific question was formulated according to the Population, Intervention, Control, and Outcome (PICO): Does the type of implant-abutment connection (external, internal, or conical) have an influence on peri-implant bone loss? A PubMed/MEDLINE electronic search was conducted to identify English language publications published in international journals during the last decade (from 2006 to 2016)...
May 15, 2018: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29721227/accuracy-of-fit-of-implant-supported-bars-fabricated-on-definitive-casts-made-by-different-dental-stones
#4
Ioannis Kioleoglou, Argirios Pissiotis, Michalakis Konstantinos
Background: The purpose of this study was to evaluate the accuracy of fitting of an implant supported screw-retained bar made on definitive casts produced by 4 different dental stone products. Material and Methods: The dental stones tested were QuickRock (Protechno), FujiRock (GC), Jade Stone (Whip Mix) and Moldasynt (Heraeus). Three external hexagon implants were placed in a polyoxymethylene block. Definitive impressions were made using monophase high viscosity polyvinylsiloxane in combination with custom trays...
March 2018: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29717518/evaluation-of-the-accuracy-of-conventional-and-digital-impression-techniques-for-implant-restorations
#5
Renata Vasconcellos Moura, Alberto Noriyuki Kojima, Cintia Helena Coury Saraceni, Lucas Bassolli, Ivan Balducci, Mutlu Özcan, Alfredo Mikail Melo Mesquita
PURPOSE: The increased use of CAD systems can generate doubt about the accuracy of digital impressions for angulated implants. The aim of this study was to evaluate the accuracy of different impression techniques, two conventional and one digital, for implants with and without angulation. MATERIALS AND METHODS: We used a polyurethane cast that simulates the human maxilla according to ASTM F1839, and 6 tapered implants were installed with external hexagonal connections to simulate tooth positions 17, 15, 12, 23, 25, and 27...
May 1, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29713437/comparison-of-implant-component-fractures-in-external-and-internal-type-a-12-year-retrospective-study
#6
Yuseung Yi, Jai-Young Koak, Seong-Kyun Kim, Shin-Jae Lee, Seong-Joo Heo
PURPOSE: The aim of this study was to compare the fracture of implant component behavior of external and internal type of implants to suggest directions for successful implant treatment. MATERIALS AND METHODS: Data were collected from the clinical records of all patients who received WARANTEC implants at Seoul National University Dental Hospital from February 2002 to January 2014 for 12 years. Total number of implants was 1,289 and an average of 3.2 implants was installed per patient...
April 2018: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/29682251/implant-abutment-connections-on-single-crowns-a-systematic-review
#7
REVIEW
F M Ceruso, P Barnaba, S Mazzoleni, L Ottria, M Gargari, A Zuccon, G Bruno, A DI Fiore
Different implant-abutment connections have been developed in the effort of reducing mechanical and biological failure. The most frequent complications are screw loosening, abutment or implant fracture and marginal bone loss due to overload and bacterial micro-leakage. Ideal connection should work as a one-piece implant avoiding the formation of a micro-gap at the implant-abutment interface. Different in vitro and in vivo researches have been published to compare the implant-abutment connections actually available: external hexagon, internal hexagon and conical finding different amount of micro-gap, micro-leakage and marginal bone loss...
October 2017: Oral & Implantology
https://www.readbyqxmd.com/read/29642407/load-bearing-capacity-and-retention-of-newly-developed-micro-locking-implant-prosthetic-system-an-in-vitro-pilot-study
#8
Jae-Won Choi, Kyung-Hee Choi, Hee-Jin Chae, Sung-Ki Chae, Eun-Bin Bae, Jin-Ju Lee, So-Hyoun Lee, Chang-Mo Jeong, Jung-Bo Huh
The aim of this study was to introduce the newly developed micro-locking implant prosthetic system and to evaluate the resulting its characteristics. To evaluate load-bearing capacity, 25 implants were divided into five groups: external-hexagon connection (EH), internal-octagon connection (IO), internal-hexagon connection (IH), one-body implant (OB), micro-locking implant system (ML). The maximum compressive load was measured using a universal testing machine (UTM) according to the ISO 14801. Retention was evaluated in two experiments: (1) a tensile test of the structure modifications of the components (attachment and implant) and (2) a tensile test after cyclic loading (total 5,000,000 cycles, 100 N, 2 Hz)...
April 6, 2018: Materials
https://www.readbyqxmd.com/read/29629492/the-influence-of-implant-abutment-connection-on-the-screw-loosening-and-microleakage
#9
Katsuhiro Tsuruta, Yasunori Ayukawa, Tatsuya Matsuzaki, Masafumi Kihara, Kiyoshi Koyano
BACKGROUND: There are some spaces between abutment and implant body which can be a reservoir of toxic substance, and they can penetrate into subgingival space from microgap at the implant-abutment interface. This penetration may cause periimplantitis which is known to be one of the most important factors associated with late failure. In the present study, three kinds of abutment connection system, external parallel connection (EP), internal parallel connection (IP), and internal conical connection (CC), were studied from the viewpoint of microleakage from the gap between the implant and the abutment and in connection with the loosening of abutment screw...
April 9, 2018: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/29575488/a-randomized-controlled-clinical-trial-to-assess-crestal-bone-remodeling-of-four-different-implant-designs
#10
Maarten Glibert, Stijn Vervaeke, Wolfgang Jacquet, Kim Vermeersch, Pär-Olov Östman, Hugo De Bruyn
BACKGROUND: It is claimed that bone remodeling is limited when the implant neck has microthreads and an internal abutment connection. However, comparative studies, excluding confounding factors, are scarce. AIM: This RCT aims to assess whether a coronal microthreaded design and an internal abutment connection affects crestal bone loss, up to one year of function. MATERIALS AND METHODS: Twenty-one maxillary edentulous patients were consecutively treated for a bar supported maxillary overdenture on four different implants with respectively: internal connection and microthreads on the implant neck (I MT); internal connection, no microthreads (I NMT), external connection, with microthreads (E MT), and external connection, without microthreads (E NMT)...
March 25, 2018: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/29534122/effects-of-screw-configuration-on-the-preload-force-of-implant-abutment-screws
#11
Holger Zipprich, Florian Rathe, Sören Pinz, Luca Schlotmann, Hans-Christoph Lauer, Christoph Ratka
PURPOSE: The aim of this study was to investigate the effects of tightening torque, screw head angle, and thread number on the preload force of abutment screws. MATERIALS AND METHODS: The test specimens consisted of three self-manufactured components (ie, a thread sleeve serving as an implant analog, an abutment analog, and an abutment screw). The abutment screws were fabricated with metric M1.6 external threads. The thread number varied between one and seven threads...
March 2018: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/29534121/mouthguard-biomechanics-for-protecting-dental-implants-from-impact-experimental-and-finite-element-impact-analysis
#12
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
https://www.readbyqxmd.com/read/29527740/fracture-strength-of-zirconia-implant-abutments-on-narrow-diameter-implants-with-internal-and-external-implant-abutment-connections-a-study-on-the-titanium-resin-base-concept
#13
Irena Sailer, Asgeir G Asgeirsson, Daniel S Thoma, Vincent Fehmer, Thor Aspelund, Mutlu Özcan, Bjarni E Pjetursson
BACKGROUND: There is limited knowledge regarding the strength of zirconia abutments with internal and external implant abutment connections and zirconia abutments supported by a titanium resin base (Variobase, Straumann) for narrow diameter implants. OBJECTIVES: To compare the fracture strength of narrow diameter abutments with different types of implant abutment connections after chewing simulation. MATERIAL AND METHODS: Hundred and twenty identical customized abutments with different materials and implant abutment connections were fabricated for five groups: 1-piece zirconia abutment with internal connection (T1, Cares-abutment-Straumann BL-NC implant, Straumann Switzerland), 1-piece zirconia abutment with external hex connection (T2, Procera abutment-Branemark NP implant, Nobel Biocare, Sweden), 2-piece zirconia abutments with metallic insert for internal connection (T3, Procera abutment-Replace NP implant, Nobel Biocare), 2-piece zirconia abutment on titanium resin base (T4, LavaPlus abutment-VarioBase-Straumann BL-NC implant, 3M ESPE, Germany) and 1-piece titanium abutment with internal connection (C, Cares-abutment-Straumann BL-NC implant, Straumann, Switzerland)...
April 2018: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/29521677/biomechanical-behavior-of-tooth-implant-supported-prostheses-with-different-implant-connections-a-nonlinear-finite-element-analysis
#14
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
https://www.readbyqxmd.com/read/29518264/external-implantable-defibrillator-as-a-bridge-to-reimplant-after-explant-for-infection-experience-from-two-centers
#15
Gabriele Dell'Era, Matteo Ziacchi, Eleonora Prenna, Igor Diemberger, Marco Varalda, Cristian Martignani, Federico Guerra, Mauro Biffi, Eraldo Occhetta
BACKGROUND: The management of patients explanted for implantable converter defibrillator (ICD) infections may be complex when anti-bradycardia pacing and tachyarrhythmia protection are needed. We aimed to test the efficacy and safety of a conventional ICD externally connected to a transvenous dual-coil lead as bridging therapy before the reimplantation. METHODS AND RESULTS: We enrolled seven patients explanted for ICD infections and needed prolonged antibiotic therapy in two high-volume hospitals in Italy and treated them with a passive-can external ICD for a mean of 13 (4-30) days before reimplant...
March 8, 2018: Pacing and Clinical Electrophysiology: PACE
https://www.readbyqxmd.com/read/29502323/internal-driveline-damage-under-the-costal-margin-several-years-after-heartmate-ii-implant-a-series-of-three-cases
#16
Mitsugu Ogawa, Muhammad F Masood, Gregory A Ewald, Justin M Vader, Shane J LaRue, Allen Cheng, Keki R Balsara, Akinobu Itoh
Although the incidence of driveline failure has been significantly reduced with the major modification to the driveline connection to the HeartMate II left ventricular assist device (LVAD), internal and external driveline damage continues to be a major reason for pump exchange or driveline repair. We report three cases of internal driveline damage under the costal margin and in the adjacent abdominal wall. All three cases developed occasional electrical disruptions 2-5 years after the original LVAD implant through the median sternotomy...
March 3, 2018: Journal of Artificial Organs: the Official Journal of the Japanese Society for Artificial Organs
https://www.readbyqxmd.com/read/29499982/very-low-certainty-in-evidence-suggesting-that-internal-implant-abutment-connections-result-in-negligible-bone-loss-and-similar-survival-and-complication-rates-compared-with-external-implant-abutment-connections
#17
https://www.readbyqxmd.com/read/29461999/successful-use-of-leukocyte-platelet-rich-fibrin-in-the-healing-of-sinus-membrane-perforation-a-case-report
#18
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
https://www.readbyqxmd.com/read/29389805/radiotherapy-and-risk-of-implantable-cardioverter-defibrillator-malfunctions-experimental-data-from-direct-exposure-at-increasing-doses
#19
Massimo Zecchin, Jessica Artico, Gaetano Morea, Mara Severgnini, Elisabetta Bianco, Antonio De Luca, Anna Zorzin Fantasia, Luca Salvatore, Vittorino Milan, Matteo Lucarelli, Roberta Dissegna, Antonio Cannatà, Gianfranco Sinagra
AIM: During radiotherapy, in patients with implantable cardioverter-defibrillators (ICDs) malfunctions are considered more likely if doses more than 2 Gy reach the ICD site; however, most malfunctions occur with high-energy (>10 MV) radiations, and the risk is less defined using 6-MV linear accelerators. The purpose of the study is to experimentally evaluate the occurrence of malfunctions in ICDs radiated with a 6-MV linear accelerator at increasing photon doses. METHODS: Thirty-two ICDs from all manufacturers (31 explanted and one demo) were evaluated; all devices with a sufficient battery charge underwent multiple radiations with a 6-MV photon beam reaching a cumulative dose at ICD site of 0...
April 2018: Journal of Cardiovascular Medicine
https://www.readbyqxmd.com/read/29351113/fatigue-failure-of-external-hexagon-connections-on-cemented-implant-supported-crowns
#20
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
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