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Implant Dentistry

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https://www.readbyqxmd.com/read/29351113/fatigue-failure-of-external-hexagon-connections-on-cemented-implant-supported-crowns
#1
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
https://www.readbyqxmd.com/read/29351112/dimensional-variations-in-the-soft-tissue-profile-after-removal-of-implant-supported-fixed-interim-restorations-a-pilot-clinical-study
#2
Juan C Duran, Felipe Aguirre, Rodrigo Pino, Diego Velásquez
PURPOSE: To measure dimensional changes of the periimplant soft tissue profile after removal of a single implant fixed interim restorations using digital impression procedures. MATERIALS AND METHODS: Ten participants presenting with single implant-supported fixed interim restorations (ISFIRs) on the maxillary esthetic zone. A 2-step silicone impression was made of the maxillary arch with the ISFIRs. The experimental procedure was obtained by making digital impressions of the gingival contours immediately after ISFIR removal...
January 17, 2018: Implant Dentistry
https://www.readbyqxmd.com/read/29341976/cone-beam-ct-assessment-of-the-position-of-the-medial-lingual-foramen-for-dental-implant-placement-in-the-anterior-symphysis
#3
Arturo Sanchez-Perez, Paula Boix-Garcia, Pía Lopez-Jornet
OBJECTIVES: To determine the position of the mandibular medial lingual foramen with cone-beam CT (CBCT) 3D imaging modalities when implants are to be placed in the anterior symphysis of the mandible. MATERIALS AND METHODS: A total of 111 CBCTs were considered acceptable and analyzed. The variables measured were as follows: (1) length of the outlet duct; (2) distance from the canal to the buccal cortex; (3) distance from the canal to the inferior cortex; (4) distance from the canal to the lingual cortex; (5) distance from the canal to the alveoli of the nearest tooth in dentate patients and distance from the canal to the marginal crest in edentulous patients; (6) angle of the duct to the horizontal Frankfurt plane; (7) diameter of the exit orifice; and (8) output level of the socket in relation to the teeth and the presence of bifurcations...
January 16, 2018: Implant Dentistry
https://www.readbyqxmd.com/read/29341975/validation-of-a-simplified-implant-retained-cantilever-fixed-prosthesis
#4
João Paulo Mendes Tribst, Vinícius Anéas Rodrigues, Alexandre Luiz Souto Borges, Dimas Rennó de Lima, Renato Sussumu Nishioka
PURPOSE: To evaluate the stress and strain generated in a fixed four-element prosthesis under the application of axial and nonaxial loads using a simplified implant-supported fixed prosthesis model. MATERIALS AND METHODS: A 3-dimensional model was constructed containing 3 implants with a conventional anatomical prosthesis (G1). The second model with the same implant system received the simplified prosthesis (G2). A load of 300 N was applied at an axial point and a nonaxial point through finite element analysis software...
January 16, 2018: Implant Dentistry
https://www.readbyqxmd.com/read/29334509/comparison-of-stress-and-strain-distribution-around-splinted-and-nonsplinted-6-mm-short-implants-in-posterior-mandible-a-finite-element-analysis-study
#5
Mansour Meimandi, Mohammad Reza Talebi Ardakani, Reza Amid, Amir Mahmoudi Motlagh, Shahrzad Beheshti
PURPOSE: This study was designed to compare the biomechanical performance of splinted and nonsplinted short implants, in the posterior mandible, using finite element analysis. MATERIALS AND METHODS: Three-dimensional models of short implants with 2 different diameters (4 × 6 mm or 5 × 6 mm) were scanned, and CATIA (R21) was used to simulate the model of an edentulous lower jaw. Experimental groups were designed as follows: (1) D4L6-splinted (three 4 × 6-mm splinted implants), (2) D4L6-nonsplinted, (3) D5L6-splinted, and (4) D5L6-nonsplinted...
January 12, 2018: Implant Dentistry
https://www.readbyqxmd.com/read/29329120/re-osseointegration-of-dental-implants-after-periimplantitis-treatments-a-systematic-review
#6
Marwa Madi, Moe Htet, Osama Zakaria, Adel Alagl, Shohei Kasugai
PURPOSE: This review considers possible surgical treatment modalities for induced periimplantitis to regain re-osseointegration as reported in the recent literature. MATERIALS AND METHODS: Electronic searches in MEDLINE/PubMed and Google Scholar databases were performed on experimental studies considering induced periimplantitis and attempts to achieve re-osseointegration from 2003 up to December 2016. Conflicts about articles were solved by authors' discussion...
January 11, 2018: Implant Dentistry
https://www.readbyqxmd.com/read/29329119/effects-of-valproic-acid-on-morphology-proliferation-and-differentiation-of-mesenchymal-stem-cells-derived-from-human-gingival-tissue
#7
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
https://www.readbyqxmd.com/read/29324516/implants-with-and-without-laser-microtextured-collar-a-10-year-clinical-and-radiographic-comparative-evaluation
#8
Renzo Guarnieri, Rolando Ceccarelli, John L Ricci, Tiziano Testori
INTRODUCTION: This article reports, after at least 10 years of follow-up, the comparative data of marginal bone loss (MBL) and periimplant soft tissue parameters, around implant with and without laser-microtextured (L) collar surface, previously reported at 3 years of follow-up. MATERIALS AND METHODS: Twenty implants with L collar surface (test) were placed adjacent to 20 control implants with machined (M) collar surface in 15 partially edentulous patients, who were followed up for at least 10 years as part of a prospective longitudinal study...
January 10, 2018: Implant Dentistry
https://www.readbyqxmd.com/read/29319546/influence-of-the-presence-of-alveolar-mucosa-at-implants-a-histological-study-in-humans
#9
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
https://www.readbyqxmd.com/read/29319545/patient-reported-outcomes-after-lateral-wall-sinus-floor-elevation-a-systematic-review
#10
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
https://www.readbyqxmd.com/read/29303816/short-implants-versus-standard-implants-midterm-outcomes-of-a-clinical-study
#11
M Emre Benlidayi, Yurdanur Ucar, Ufuk Tatli, Orhun Ekren, Burcu Evlice, Halil Ibrahim Kisa, Uygar Baksi
INTRODUCTION: The aim of this study was to evaluate the midterm survival rate, marginal bone resorption (MBR), and stability of short implants and to compare the results with standard length implants. MATERIALS AND METHODS: A total of 38 patients were included. In total, 147 implants (Nucleoss Implants, Izmir, Turkey) were placed (86 short implants and 61 standard implants). Cement-retained metal-ceramic prostheses were fabricated. MBR was evaluated on periapical radiographs taken at implant placement, at the time of crown insertion and annually thereafter...
January 4, 2018: Implant Dentistry
https://www.readbyqxmd.com/read/29300207/stress-distribution-in-splinted-and-unsplinted-implant-supported-maxillary-overdentures-a-3d-finite-element-analysis
#12
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
https://www.readbyqxmd.com/read/29298170/a-crucial-role-of-reviewers
#13
Morton L Perel
No abstract text is available yet for this article.
January 2, 2018: Implant Dentistry
https://www.readbyqxmd.com/read/29283896/biological-and-technical-complications-of-splinted-or-nonsplinted-dental-implants-a-decision-tree-for-selection
#14
Andrea Ravidà, Muhammad H A Saleh, Miguel Carreño Muriel, Bartosz Maska, Hom-Lay Wang
PURPOSE: To present an in-depth review on splinting versus nonsplinting the restorations of adjacent dental implants, in addition to discussing biological and technical complications associated with either choice; and to provide the clinician with a decision tree that serves in everyday judgments when it comes to addressing this issue. MATERIALS AND METHODS: A comprehensive literature review was performed for articles comparing success of splinted versus nonsplinted dental implants...
December 27, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/29283895/critical-size-defects-for-bone-regeneration-experiments-in-the-dog-mandible-a-systematic-review
#15
Hesham F Marei, Khalid Mahmood, Khalid Almas
OBJECTIVES: To perform a systematic literature review of studies involving critical size defects (CSDs) in the dog mandible and calvarium to find out the common characteristics of CSDs. MATERIALS AND METHODS: Internet search of the literature was performed on June 2016 based on specific keywords. The search process included 5 databases. The Animal Research Reporting In Vivo Experiment (ARRIVE) guidelines was used to assess the quality of the included studies. RESULTS: Nine studies have met the inclusion criteria and subjected to quality evaluation...
December 27, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/29271786/contemporary-digital-restorative-and-minimal-invasive-preservative-surgical-techniques-in-the-esthetic-zone-a-case-report
#16
Benedikt C Spies, Tachir Fatkulajew, Ralf-Joachim Kohal, Matthias Petsch
When immediately temporizing an implant, relining and cementation of the provisional can be a challenging, time-consuming, and contaminating procedure. Excess resin and cement need to be carefully removed from the fresh wound. This can be overcome by digitally backward planning the treatment with subsequent production of a surgical guide to be used by both the technician and the dentist. In this report, a patient with a fractured and hopeless central incisor and an apical radiolucency at his compromised (root-canal treated, post and core build-up) contralateral counterpart was treated using guided implant installation, immediate placement of a prefabricated screw-retained provisional, and apicoectomy...
December 21, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/29271785/osteointegration-of-tissue-level-implants-with-very-low-insertion-torque-in-soft-bone-a-clinical-study-on-sla-surface-treatment
#17
Simone Verardi, Jessica Swoboda, Francesco Rebaudi, Alberto Rebaudi
INTRODUCTION: Evidence shows lower percentage of osteointegration when implants are placed without sufficient primary stability. The present work tested the hypothesis that implants unstable at insertion could achieve osteointegration with proper implant surface treatment. MATERIALS AND METHODS: Eleven Straumann tissue-level implants with sandblasted, large-grit, acid-etched (SLA) surface treatment were placed in soft bone unfavorable to primary stability, as indicated by insertion torque lower than 10 N/cm and slight mobility on the application of a lateral load of 250 g...
December 21, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/29256942/evaluation-of-failed-implants-by-metallographic-and-energy-dispersive-x-ray-analysis
#18
Clarice Maia Soares de Alcântara Pinto, Douglas Rangel Goulart, Luciana Asprino, Sérgio Olate, Márcio de Moraes
OBJECTIVE: To evaluate the microscopic structure and chemical composition of titanium dental implants removed from patients with implant failure. MATERIALS AND METHODS: Thirty-eight dental implants removed from 29 patients between January 2012 and September 2014 were studied by metallographic analysis, and 7 of these implants were also studied by energy-dispersive x-ray (EDX) analysis. Medical records of these patients were examined. RESULTS: Dental implants were removed in a median of 54...
December 14, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/29256941/novel-technique-for-reconstruction-of-the-severely-resorbed-posterior-maxillae-tuberosity-flip-approach
#19
Mehmet Ali Altay, Alper Sindel, Nelli Yıldırımyan, Mehmet Mustafa Özarslan
PURPOSE: This report describes a novel technique that allows for 3-dimensional augmentation of localized bone defects of the posterior maxilla and simultaneous implant placement by means of using the maxillary tuberosity as a block graft. MATERIALS AND METHODS: The residual bone in maxillary tuberosity is harvested as a whole. The recipient site and the bone graft are prepared with compatible implant drills. The bone graft is flipped to fit the defect and fixated in place using the dental implant, which anchors both the graft and the subantral bone...
December 14, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/29227324/three-dimensional-evaluation-on-the-effect-of-maxillary-dentition-distalization-with-miniscrews-implanted-in-the-infrazygomatic-crest
#20
Xiaoxue Wu, Haibo Liu, Chen Luo, Yonggang Li, Yin Ding
OBJECTIVE: To evaluate the effect of the maxillary dentition distalization with miniscrews implanted in the infrazygomatic (IZ) crest with 3D reconstruction module from cone-beam computed tomography (CBCT). METHODS: Twenty patients who previously underwent dentition distalization treatment with miniscrews were recruited. A total of 40 images were obtained using CBCT, taken immediately before placement of the miniscrew anchorage and at the end of distalization. The 3D-line measurements were recorded to monitor dental changes...
December 7, 2017: Implant Dentistry
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