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Dental implant connection

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https://www.readbyqxmd.com/read/28343668/clinician-generated-torque-on-abutment-screws-using-different-hand-screwdrivers
#1
Marzieh Alikhasi, Mahmoud Kazemi, Hamid Jalali, Shervin Hashemzadeh, Hamide Dodangeh, Burak Yilmaz
STATEMENT OF PROBLEM: Many clinicians use hand screwdrivers to tighten prosthetic and abutment screws. The impact of the screwdriver type, the location of the implant, and the sex of the practitioner on the generated torque is not well understood. PURPOSE: The purpose of this in vitro study was to compare the torque generated by different hand screwdrivers when used in the anterior and posterior regions and to evaluate the correlation between the applied torque and the sex and body mass index (BMI) of the practitioner...
March 23, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28327696/subcrestal-placement-of-dental-implants-with-an-internal-conical-connection-of-0-5%C3%A2-mm-versus-1-5%C3%A2-mm-outcome-of-a-multicentre-randomised-controlled-trial-1-year-after-loading
#2
Federico Gualini, Sergio Salina, Fabio Rigotti, Cristian Mazzarini, Diego Longhin, Mauro Grigoletto, Anna Trullenque-Eriksson, Luca Sbricoli, Marco Esposito
PURPOSE: To evaluate whether there are some clinical benefits by placing single dental implants either 0.5 or 1.5 mm subcrestally in healed bone crests. MATERIALS AND METHODS: Sixty partially edentulous patients requiring two single implant-supported crowns had both sites randomly allocated either to 0.5 mm or 1.5 mm subcrestal implant placement according to a split-mouth design at six centres. Implants were submerged in aesthetic areas or non-submerged in non-aesthetic areas for 3 months...
2017: European Journal of Oral Implantology
https://www.readbyqxmd.com/read/28326723/-current-dental-implant-design-and-its-clinical-importance
#3
Lin Ye
The development of clinical implant dentistry was intensively affected by dental implant design improvement and innovation, which brought about new concept, even milestone-like changes of clinical protocol. The current improvements of dental implant design and their clinical importance could be highlighted as followings: 1) The implant apical design influences the implant preliminary stability in immediate implant. The apical 3-5 mm design of implant makes implant stable in immediate implant, because this part would be screwed into alveolar bone through fresh socket, the other part of implant could not be tightly screwed in the socket because of smaller implant diameter...
February 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28321800/wear-of-morse-taper-and-external-hexagon-implant-joints-after-abutment-removal
#4
Abraão M Prado, Jorge Pereira, Filipe S Silva, Bruno Henriques, Rubens M Nascimento, Cesar A M Benfatti, José López-López, Júlio C M Souza
The aim of this in vitro study was to evaluate the removal torque values on abutments and the morphological wear aspects of two different dental implant joints after immersion in a medium containing biofilm from human saliva. Twenty implant-abutment assemblies were divided into four groups in this study: (A) Morse taper free of medium containing biofilm, and (B) after contact with a medium containing biofilm from human saliva; (C) External Hexagon free of medium containing biofilm, and (D) after contact with medium containing biofilm from human saliva...
May 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28301291/histological-and-histomorphometrical-analysys-on-a-loaded-implant-with-platform-switching-and-conical-connection-a-case-report
#5
Giovanna Iezzi, Flavia Iaculli, Roberta Calcaterra, Adriano Piattelli, Michele Di Girolamo, Luigi Baggi
The association of Morse taper implant-abutment design with the use of a smaller abutment diameter (platform-switching) may improve dental implant success rate and prevent peri-implant bone loss. The aim of the present study was to histologically and histomorphometrically evaluate the behavior of peri-implant tissues around an implant with a conical connection associated with platform-switching. A platform-switched Morse-cone connection implant was inserted in the left posterior mandible in a 61-year-old patient...
March 16, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28261906/randomized-controlled-clinical-trial-comparing-two-dental-implants-with-different-neck-configurations
#6
Ignacio Sanz-Martín, Ignacio Sanz-Sánchez, Fernando Noguerol, Susy Cok, Alberto Ortiz-Vigón, Mariano Sanz
BACKGROUND: Peri-implant bone levels can vary according to the implant neck macro-design and the implant-abutment interface. PURPOSE: To compare the changes in soft and hard tissues when using a one-piece implant with a machined collar (TG) versus a two-piece implant with a progressive platform widening and a platform switching connection (SP). MATERIAL AND METHODS: Partially edentulous patients willing to receive one or two implants in the posterior maxilla or mandible were randomized to the control (TG) or to the test group (SP)...
March 6, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28231345/in-vitro-evaluation-of-three-methods-for-the-retrieval-of-fractured-screw-fragments-from-dental-implants
#7
Rubén Agustín-Panadero, Carlos Labaig-Rueda, Beatriz Castillo-Rodriguez, Alberto Ferreiroa, María Fernanda Solá-Ruíz
PURPOSE: To compare the effectiveness of different methods of fractured screw fragment retrieval from dental implants, comparing a conventional method (use of an exploration probe and ultrasonic tips) with two mechanical retrieval kits. MATERIALS AND METHODS: One hundred thirty-five screws in implant internal connections were fractured to test fragment retrieval comparing three methods: conventional method with the use of an explorer probe and ultrasonic tips (group CE), extraction with a mechanical kit with a guide cylinder (group MK1), and extraction with a mechanical kit without a guide cylinder (group MK2)...
February 23, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28222883/simplified-digital-workflow-for-dental-implant-restoration-on%C3%A2-a%C3%A2-stock%C3%A2-abutment-using-an-intraoral-scanner-a%C3%A2-dental%C3%A2-technique
#8
Jong-Eun Kim, Ji-Hyun Park, Hong-Seok Moon, June-Sung Shim
A straightforward digital restorative method based on a library of stock abutments is presented. Precisely scanned data of laboratory analog components of the stock abutment were obtained using a tabletop scanner to produce the library. The stock abutment and surrounding teeth, opposing arch, and occlusal information were recorded using an intraoral scanner. After transferring the scanned data to computer-aided design software, an appropriate library file for the abutment connected within the mouth was matched in order to design the prosthesis...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28196152/human-histologic-evidence-of-reosseointegration-around-an-implant-affected-with-peri-implantitis-following-decontamination-with-sterile-saline-and-antiseptics-a-case-history-report
#9
Paul Fletcher, Daniel Deluiz, Eduardo Mb Tinoco, John L Ricci, Dennis P Tarnow, Justine Monnerat Tinoco
The treatment of peri-implant disease is one of the most controversial topics in implant dentistry. The multifactorial etiology and the myriad proposed techniques for managing the problem make successful decontamination of an implant surface affected by peri-implantitis one of the more unpredictable challenges dental practitioners have to face. This article presents the first known published case report demonstrating human histologic evidence of reosseointegration using a plastic curette for mechanical debridement and dilute sodium hypochlorite, hydrogen peroxide, and sterile saline for chemical detoxification...
February 14, 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28183641/nanoscale-size-effect-in-in-situ-titanium-based-composites-with-cell-viability-and-cytocompatibility-studies
#10
Andrzej Miklaszewski, Mieczysława U Jurczyk, Mariusz Kaczmarek, Anna Paszel-Jaworska, Aleksandra Romaniuk, Natalia Lipińska, Jakub Żurawski, Paulina Urbaniak, Mieczyslaw Jurczyk
Novel in situ Metal Matrix Nanocomposite (MMNC) materials based on titanium and boron, revealed their new properties in the nanoscale range. In situ nanocomposites, obtained through mechanical alloying and traditional powder metallurgy compaction and sintering, show obvious differences to their microstructural analogue. A unique microstructure connected with good mechanical properties reliant on the processing conditions favour the nanoscale range of results of the Ti-TiB in situ MMNC example. The data summarised in this work, support and extend the knowledge boundaries of the nanoscale size effect that influence not only the mechanical properties but also the studies on the cell viability and cytocompatibility...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28142072/modeling-dental-implant-insertion
#11
A Dorogoy, D Rittel, K Shemtov-Yona, R Korabi
The success of dental implantation is connected with the so-called implant primary stability, a synonym for the implant anchoring inside the bone. The primary stability is related to the applied peak torque to the implant during the insertion process. This work simulates the process of insertion of a typical commercial implant into the jaw bone (mandible) using a 3D dynamic non-linear finite-elements software. The model considers the geometrical and mechanical properties of the implant, the bone-implant friction, and the insertion procedure parameters, namely angular velocity and normal load...
January 21, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28094240/ectopic-bone-formation-by-gel-derived-bioactive-glass-poly-l-lactide-co-glycolide-composites-in-a-rabbit-muscle-model
#12
Joanna Filipowska, Katarzyna Cholewa-Kowalska, Jarosław Wieczorek, Danuta Semik, Zbigniew Dąbrowski, Maria Łączka, Anna M Osyczka
In this study we aimed to assess the in vivo osteoinductive properties of two composite scaffolds made of PLGA (poly-L-lactide-co-glycolide) and two types of gel-derived bioactive glasses, namely a high silica S2 bioactive glass (S2-PLGA composites) or high lime A2 bioactive glass (A2-PLGA composites). To achieve that, the potential of the composites to induce ectopic bone formation in a rabbit muscle has been examined along with the control PLGA scaffold. Cylinder-like scaffolds of 7  ×  3 mm (width  ×  height) were implanted into pouches created in the latissimus dorsi muscle of 18 New Zealand rabbits...
January 17, 2017: Biomedical Materials
https://www.readbyqxmd.com/read/28072999/-features-and-advances-of-morse-taper-connection-in-oral-implant
#13
C L Tang, S K Zhao, C Huang
Dental implants have been widely accepted as a predictable and reliable tool for dental reconstruction with the development of the economy. The design of implant-abutment connections has influence on mechanical properties and biological characteristics of implants. There are two types of implant-abutment connections, the external and the internal connections. Morse taper connection is one of the internal connections and its conical shape creates significant friction via the high propensity of parallelism between the two structures within the joint space...
January 9, 2017: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
https://www.readbyqxmd.com/read/28042449/stress-and-strain-distribution-in-three-different-mini-dental-implant-designs-using-in-implant-retained-overdenture-a-finite-element-analysis-study
#14
W Aunmeungtong, P Khongkhunthian, P Rungsiyakull
Finite Element Analysis (FEA) has been used for prediction of stress and strain between dental implant components and bone in the implant design process. PURPOSE: Purpose of this study was to characterize and analyze stress and strain distribution occurring in bone and implants and to compare stress and strain of three different implant designs. MATERIALS AND METHODS: Three different mini dental implant designs were included in this study: 1. a mini dental implant with an internal implant-abutment connection (MDIi); 2...
October 2016: Oral & Implantology
https://www.readbyqxmd.com/read/28042437/efficacy-of-a-new-implant-abutment-connection-to-minimize-microbial-contamination-an-in-vitro-study
#15
G E Mancini, A B Gianni', F Cura, Z Ormanier, F Carinci
PURPOSE: The aim of the present study is to evaluate the effectiveness of Ditron implants abutment connection (IAC) to sealing the gap between two pieces. MATERIALS AND METHODS: To identify the efficacy of a new IAC, the passage of genetically modified bacteria across IAC was evaluated. A total of five Ditron Implants were used. All implants were immerged in a bacterial culture for forty-eight hours and then bacteria amount was measured inside and outside IAC with Real-time PCR...
July 2016: Oral & Implantology
https://www.readbyqxmd.com/read/28000282/coverage-of-mucosal-recessions-at-dental-implants
#16
REVIEW
Anton Sculean, Vivianne Chappuis, Raluca Cosgarea
Facial peri-implant mucosal recessions represent an increasing complication in implant dentistry and may negatively affect the esthetic outcome and patient satisfaction. The aim of the present paper is to provide a review on the potential causes of facial peri-implant mucosal recessions and to provide a rationale for treatment along with possible treatment options. The available data indicate that soft tissue augmentation around dental implants is possible, but at present there is no evidence demonstrating that the augmented soft tissues are able to influence the peri-implant bone levels (e...
February 2017: Periodontology 2000
https://www.readbyqxmd.com/read/28000274/digital-technology-in-fixed-implant-prosthodontics
#17
REVIEW
Tim Joda, Marco Ferrari, German O Gallucci, Julia-Gabriela Wittneben, Urs Brägger
Digital protocols are increasingly influencing prosthodontic treatment concepts. Implant-supported single-unit and short-span reconstructions will benefit mostly from the present digital trends. In these protocols, monolithic implant crowns connected to prefabricated titanium abutments, which are created based on data obtained from an intraoral scan followed by virtual design and production, without the need of a physical master cast, have to be considered in lieu of conventional manufacturing techniques for posterior implant restorations...
February 2017: Periodontology 2000
https://www.readbyqxmd.com/read/28000266/zirconia-dental-implants-where-are-we-now-and-where-are-we-heading
#18
REVIEW
Norbert Cionca, Dena Hashim, Andrea Mombelli
Despite decades of titanium as the gold standard in oral implantology, the search for alternatives has been growing. High esthetic standards and increasing incidence of titanium allergies, along with a rising demand for metal-free reconstructions, have led to the proposal of ceramics as potential surrogates. Following numerous experimental studies, zirconium dioxide (zirconia) has earned its place as a potential substitute for titanium in implantology. Yet, despite zirconia's excellent biocompatibility and tissue integration, low affinity to plaque and favorable biomechanical properties, early failures were significantly higher for zirconia implants than for titanium implants...
February 2017: Periodontology 2000
https://www.readbyqxmd.com/read/27996179/crestal-bone-loss-around-adjacent-dental-implants-restored-with-splinted-and-nonsplinted-fixed-restorations-a-systematic-literature-review
#19
REVIEW
Mohammad D Al Amri, Sergio Varela Kellesarian
PURPOSE: The aim of this systematic review was to compare the crestal bone loss around splinted and nonsplinted adjacent implants. MATERIALS AND METHODS: To address the focused question, "Is crestal bone loss around adjacent implants different with splinted from that with nonsplinted restorations?," indexed databases were searched from 1965 up to and including May 2016 using various combinations of the following keywords: "implant," "splinted," "nonsplinted," "unsplinted," "connected," "unconnected," "nonconnected," and "bone loss...
November 4, 2016: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/27987717/effect-of-different-types-of-prosthetic-platforms-on-stress-distribution-in-dental-implant-supported-prostheses
#20
Lurian Minatel, Fellippo Ramos Verri, Guilherme Abu Halawa Kudo, Daniel Augusto de Faria Almeida, Victor Eduardo de Souza Batista, Cleidiel Aparecido Araujo Lemos, Eduardo Piza Pellizzer, Joel Ferreira Santiago
A biomechanical analysis of different types of implant connections is relevant to clinical practice because it may impact the longevity of the rehabilitation treatment. Therefore, the objective of this study is to evaluate the Morse taper connections and the stress distribution of structures associated with the platform switching (PSW) concept. It will do this by obtaining data on the biomechanical behavior of the main structure in relation to the dental implant using the 3-dimensional finite element methodology...
February 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
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