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Clinical Implant Dentistry and related Research

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https://www.readbyqxmd.com/read/28791801/one-piece-internal-zirconia-abutments-for-single-tooth-restorations-on-narrow-and-regular-diameter-implants-a-5-year-prospective-follow-up-study
#1
Andrée Nilsson, Lars-Åke Johansson, Christina Lindh, Anders Ekfeldt
BACKGROUND: Studies have reported an increased risk for fractures of zirconia abutments compared with titanium abutments. PURPOSE: The aim of this study was to evaluate single-tooth implant restorations with one-piece yttria-stabilized internal zirconia abutments on narrow and regular diameter implants up to 6 years after insertion. MATERIAL AND METHODS: This study comprises 52 consecutively treated patients, with a median age of 19 years...
August 9, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28772024/biomechanical-behavior-of-titanium-and-zirconia-frameworks-for-implant-supported-full-arch-fixed-dental-prosthesis
#2
Rodrigo Tiossi, Érica Alves Gomes, Adriana Cláudia Lapria Faria, Renata Cristina Silveira Rodrigues, Ricardo Faria Ribeiro
BACKGROUND: The biomechanical behavior of implant-supported titanium and zirconia full-arch fixed dental prosthesis (FAFDP) frameworks require further investigation. PURPOSE: Strains transferred by implant-supported titanium (Ti) and zirconia (Zr) FAFDP frameworks were analyzed. MATERIALS AND METHODS: Maxillary 14-unit FAFDPs supported by 6 implants and 12-unit FAFDPs supported by 4 implants were tested. One-piece frameworks were fabricated by computer-aided design/computer-aided manufacturing...
August 2, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28766912/measurement-of-the-zygomatic-region-for-the-optimal-placement-of-quad-zygomatic-implants
#3
Kuo-Feng Hung, Qi-Yong Ai, Sheng-Chi Fan, Feng Wang, Wei Huang, Yi-Qun Wu
BACKGROUND: The zygomatic implant is suggested to be placed in zygomatic areas with the largest thickness, but regions to obtain the largest bone-to-implant contact (BIC) were unknown. PURPOSE: To identify the zygomatic regions for placing quad zygomatic implants that obtain the largest BIC. MATERIALS AND METHODS: The zygomatic thicknesses of 300 zygomata were measured at total 12 points on the superior, middle, and inferior areas on the 3-dimensional reconstruction images...
August 1, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28766312/comparison-of-marginal-bone-loss-and-implant-success-between-axial-and-tilted-implants-in-maxillary-all-on-4-treatment-concept-rehabilitations-after-5-years-of-follow-up
#4
Milena Hopp, Miguel de Araújo Nobre, Paulo Maló
BACKGROUND: There is need for more scientific and clinical information on longer-term outcomes of tilted implants compared to implants inserted in an axial position. PURPOSE: Comparison of marginal bone loss and implant success after a 5-year follow-up between axial and tilted implants inserted for full-arch maxillary rehabilitation. MATERIAL AND METHODS: The retrospective clinical study included 891 patients with 3564 maxillary implants rehabilitated according to the All-on-4 treatment concept...
August 1, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28752693/comparison-between-mineralized-cancellous-bone-allograft-and-an-alloplast-material-for-sinus-augmentation-a-split-mouth-histomorphometric-study
#5
Roni Kolerman, Joseph Nissan, Marina Rahmanov, Hana Vered, Omer Cohen, Haim Tal
BACKGROUND: Several grafting materials have been used in sinus augmentation procedures including autogenous bone, demineralized freeze-dried bone, hydroxyapatite, β-tricalcium phosphate, anorganic deproteinized bovine bone, and combination of these and others. Yet, the issue of the optimal graft material for sinus floor augmentation is controversial. PURPOSE: This prospective, randomized split-mouth study was undertaken to histomorphometrically compare a biphasic calcium phosphate (BCP) alloplastic bone substitute and a human bone mineral allograft (freeze-dried bone allograft, FDBA) in patients undergoing bilateral maxillary lateral sinus floor augmentation...
July 27, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28745035/evaluation-of-complication-rates-and-vertical-bone-gain-after-guided-bone-regeneration-with-non-resorbable-membranes-versus-titanium-meshes-and-resorbable-membranes-a-randomized-clinical-trial
#6
Alessandro Cucchi, Elisabetta Vignudelli, Aldo Napolitano, Claudio Marchetti, Giuseppe Corinaldesi
BACKGROUND: The partial edentulous posterior mandible is often a challenge area that requires a bone reconstructive surgery for implants placement. PURPOSE: This RCT was aimed to evaluate complications rate and vertical bone gain after Guided Bone Regeneration (GBR) with dense non-resorbable d-PTFE titanium-reinforced membranes (Group A) versus titanium meshes covered by cross-linked collagen membranes (Group B). MATERIAL AND METHODS: 40 partially edentulous patients with atrophic posterior mandible, were randomly divided into two study group: 20 patients were treated with one stage GBR by means of non-resorbable d-PTFE titanium-reinforced membranes (Group A); and 20 patients, by means of titanium mesh covered by cross-linked collagen membranes (Group B)...
July 26, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28745027/histologic-and-histomorphometric-assessment-of-sinus-floor-augmentation-with-beta-tricalcium-phosphate-alone-or-in-combination-with-pure-platelet-rich-plasma-or-platelet-rich-fibrin-a-randomized-clinical-trial
#7
Songül Cömert Kılıç, Metin Güngörmüş, Seçil Nazife Parlak
BACKGROUND: The potential effects of adding pure platelet-rich plasma (P-PRP) or platelet-rich fibrin (PRF) to beta-tricalcium phosphate (β-TCP) graft substitute on bone formation and regeneration after maxillary sinus-floor elevation remains unclear. PURPOSE: To compare the histologic and histomorphometric outcomes of maxillary sinus-floor augmentation among β-TCP alone, P-PRP-mixed β-TCP, and PRF-mixed β-TCP. MATERIAL AND METHODS: In this randomized clinical trial, elevated sinus cavities were grafted with β-TCP (the control group), P-PRP-mixed β-TCP (the P-PRP group), and PRF-mixed β-TCP (PRF group)...
July 26, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28745002/dimensional-changes-of-the-maxillary-sinus-following-tooth-extraction-in-the-posterior-maxilla-with-and-without-socket-preservation
#8
Itay Levi, Michal Halperin-Sternfeld, Jacob Horwitz, Hadar Zigdon-Giladi, Eli E Machtei
BACKGROUND: Sinus pneumatization is commonly observed following tooth extraction in the posterior maxilla, however, the role of this pneumatization in the overall changes in the vertical bone height is not clear. PURPOSE: To compare dimensional changes in the alveolar ridge and corresponding maxillary sinus following tooth extraction, with or without socket preservation. MATERIALS AND METHODS: 42 patients underwent tooth extraction (control group) and 21 patients underwent tooth extraction with socket preservation using DBBM (study group)...
July 26, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28744993/clinical-radiological-and-gene-expression-analyses-in-smokers-and-non-smokers-part-2-rct-on-the-late-healing-phase-of-osseointegration
#9
Shariel Sayardoust, Omar Omar, Ola Norderyd, Peter Thomsen
BACKGROUND: The mechanisms behind the impact of smoking on osseointegration are not fully understood. PURPOSE: To investigate the initial clinical and molecular course of osseointegration of different implants in smokers and non-smokers in a randomized controlled trial (RCT). MATERIALS AND METHODS: Smoking (n = 16) and non-smoking (n = 16) patients received 3 implant types: machined, oxidized, and laser-modified surfaces. Baseline bone biopsies were retrieved from the implant sites...
July 26, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28744958/post-extraction-implant-placement-into-infected-versus-non-infected-sites-a-multicenter-retrospective-clinical-study
#10
Francesco Zuffetti, Matteo Capelli, Fabio Galli, Massimo Del Fabbro, Tiziano Testori
PURPOSE: The aim of this study was to assess whether immediate implant placement into post-extraction sites presenting a chronic infection poses a greater risk of implant failure than immediate placement in non-infected sites. MATERIALS AND METHODS: Records of patients who underwent extraction and immediate implant placement into both infected and non-infected sites from January 1998 to September 2014 at 5 different dental centers were considered for inclusion. Included records were subjected to statistical analysis of survival rates, along with a number of other patient-, implant-, surgery-, and prosthesis-related variables...
July 26, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28656723/stem-cell-therapy-for-reconstruction-of-alveolar-cleft-and-trauma-defects-in-adults-a-randomized-controlled-clinical-trial
#11
Mona N Bajestan, Archana Rajan, Sean P Edwards, Sharon Aronovich, Lucia H S Cevidanes, Angeliki Polymeri, Suncica Travan, Darnell Kaigler
BACKGROUND: Stem cell therapy with bone marrow-derived mesenchymal stem cells is a promising tissue engineering strategy to promote regeneration of craniofacial bone. PURPOSE: To determine whether cell therapy with ex vivo expanded stem cell populations would be safe and efficacious in the regeneration of large alveolar defects in patients with a history of cleft palate or craniofacial trauma. MATERIALS AND METHODS: Eighteen patients (10 patients with traumatic injury and 8 patients with cleft palate) presenting with missing teeth associated with horizontal alveolar bone deficiencies were included in this randomized controlled clinical trial...
June 28, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28656713/lateral-ridge-augmentation-with-two-different-ratios-of-deproteinized-bovine-bone-and-autogenous-bone-a-2-year-follow-up-of-a-randomized-and-controlled-trial
#12
Arne Mordenfeld, Hanna Aludden, Thomas Starch-Jensen
BACKGROUND: The optimal ratio of deproteinized bovine bone (DPBB) and autogenous bone (AB) for lateral augmentation is presently unknown. PURPOSE: To evaluate implant treatment outcome and radiological graft changes after lateral ridge augmentation with 2 different mixtures of DPBB and AB, 2 years after functional loading. MATERIALS AND METHODS: Thirteen patients were included in a split mouth, randomized, controlled trial. Four partially edentulous and 10 totally edentulous jaws with an alveolar ridge width of <4 mm were augmented with a graft mixture of 90:10 (DPBB:AB) on one side and 60:40 (DPBB:AB) on the contra lateral side...
June 28, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28653433/immediate-loading-of-four-interforaminal-implants-supporting-a-locator-retained-mandibular-overdenture-in-the-elderly-results-of-a-3-year-randomized-controlled-prospective-clinical-study
#13
Stephan Acham, Petra Rugani, Astrid Truschnegg, Angelika Wildburger, Walther A Wegscheider, Norbert Jakse
BACKGROUND: Implant-retained overdentures have become a standard option for the prosthetic treatment of the edentulous mandible in the elderly. PURPOSE: This prospective study aimed to compare immediate and conventional loading of four interforaminal implants supporting a Locator-retained mandibular overdenture in elderly patients regarding implant survival, implant stability, and implant-related complications. MATERIAL AND METHODS: The study population comprised 20 completely edentulous patients (11 males) aged 60 years and older with severe mandible resorption...
June 27, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28631408/resonance-frequency-analysis-of-dental-implants-placed-at-the-posterior-maxilla-varying-the-surface-treatment-only-a-randomized-clinical-trial
#14
Marcelo M Novellino, Newton Sesma, Piero R Zanardi, Dalva C Laganá
BACKGROUND: Chemical modifications of the dental implant surface that improve the wettability result in a faster and better osseointegration. PURPOSE: The aim of this randomized clinical trial was to evaluate the implant stability quotient (ISQ) of implants with similar designs, treated with 2 surfaces, sandblasted acid-etched (SAE) and hydrophilic SAE, within the initial 16 weeks of healing. MATERIAL AND METHODS: A total of 64 implants (32 SAE-control group and 32 modified SAE-test group) with the same design, length, and diameter (conical and compressive, 4...
June 20, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28631287/incidental-findings-of-implant-complications-on-postimplantation-cbcts-a-cross-sectional-study
#15
Danielle Clark, Horia Barbu, Adi Lorean, Eitan Mijiritsky, Liran Levin
BACKGROUND: Survival rates of dental implants are reported to be very high and seem to indicate minimal complications related to dental implants. PURPOSE: The aim of this report was to evaluate in a cross-sectional study the prevalence of implant positioning complications as appears in postimplantation Cone-Beam Computerized Tomography (CBCT) in two of the major imaging facilities in Bucharest, Romania. METHODS: Demographic and implant data was collected from two of the three main CBCT facilities in Bucharest, Romania...
June 20, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28608504/biophysical-regulation-of-osteotomy-healing-an-animal-study
#16
Liao Wang, Maziar Aghvami, John Brunski, Jill Helms
BACKGROUND: Osteotomies have been performed for centuries yet there remains a remarkable lack of consensus on optimal methods for cutting bone. There is universal agreement, however, that preserving cell viability is critical. PURPOSE: To identify mechanobiological parameters influencing bone formation after osteotomy site preparation. MATERIALS AND METHODS: A murine maxillary osteotomy model was used to evaluate healing. Computational modeling characterized stress and strain distributions in the osteotomy, as well as the magnitude and distribution of heat generated by drilling...
June 13, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28608498/on-stress-strain-shielding-and-the-material-stiffness-paradigm-for-dental-implants
#17
Raoof Korabi, Keren Shemtov-Yona, Daniel Rittel
BACKGROUND: Stress shielding considerations suggest that the dental implant material's compliance should be matched to that of the host bone. However, this belief has not been confirmed from a general perspective, either clinically or numerically. PURPOSE: To characterize the influence of the implant stiffness on its functionality using the failure envelope concept that examines all possible combinations of mechanical load and application angle for selected stress, strain and displacement-based bone failure criteria...
June 13, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28608435/cad-cam-fabricated-ceramic-implant-supported-single-crowns-made-from-lithium-disilicate-final-results-of-a-5-year-prospective-cohort-study
#18
Benedikt Christopher Spies, Stefano Pieralli, Kirstin Vach, Ralf-Joachim Kohal
BACKGROUND: All-ceramic bilayer systems suffer from technique-sensitivity, resulting in increased technical complication rates. This might be overcome by monolithic reconstructions, facilitating digital workflows. PURPOSE: To evaluate the clinical and patient-reported outcome of CAD/CAM-fabricated implant-supported single crowns (ISCs) made of lithium disilicate (LS2 ) cemented on ceramic implants 5 years after implant installation. MATERIALS AND METHODS: Twenty-four patients were included in the study...
June 13, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28608398/histomorphometric-and-immunohistochemical-assessment-of-runx2-and-vegf-of-biogran%C3%A2-and-autogenous-bone-graft-in-human-maxillary-sinus-bone-augmentation-a-prospective-and-randomized-study
#19
Rodrigo Dos Santos Pereira, Juliana Dreyer Menezes, João Paulo Bonardi, Geraldo Luiz Griza, Roberta Okamoto, Eduardo Hochuli-Vieira
BACKGROUND: Few studies have been conducted to assess new bone formation using Biogran, a bioactive glass, in maxillary sinus bone augmentation through a prospective and randomized evaluation. Moreover, there are no studies that evaluate cellular behavior by immunohistochemical assessment for osteoblastic and vascular activity during bone repair. PURPOSE: The aim of this study is to compare new bone formation and cellular behavior with Biogran alone, a 1:1 combination of Biogran and autogenous bone graft, and autogenous bone graft alone in human maxillary sinuses...
June 13, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28580654/a-prospective-randomized-controlled-trial-of-two-window-versus-solo-window-technique-by-lateral-sinus-floor-elevation-in-atrophic-posterior-maxilla-results-from-a-1-year-observational-phase
#20
Huajie Yu, Lixin Qiu
BACKGROUND: Implant failures are more common when multiple missing posterior teeth need lateral sinus floor elevation owing to inadequate tissue maturation after grafting. Effects of lateral window dimensions on vital bone formation have rarely been compared. PURPOSE: To compare endo-sinus bone formation between two- and solo-window techniques to rehabilitate multiple missing posterior teeth that need substantial augmentation. METHODS AND MATERIALS: Patients with severely atrophic posterior maxilla were randomized to receive lateral sinus floor elevation via solo or two bony windows...
June 5, 2017: Clinical Implant Dentistry and related Research
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