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https://www.readbyqxmd.com/read/27915135/primary-stability-and-viscoelastic-displacement-of-mini-implant-system-under-loading
#1
Jim Lee, Yong-Hoon Jeong, Joseph Pittman, Toru Deguchi, William M Johnston, Henry W Fields, Do-Gyoon Kim
BACKGROUND: The objectives of the current study were to examine the effects of mini-implant diameters on 1) primary stability before bone properties are changed by active peri-implant bone remodeling and 2) the time-dependent displacement of mini-implant systems in bone under a functional radial loading and their associations with bone mineral density. METHODS: Twenty one, 8mm length mini-implants (7 each for 1.4mm, 1.6mm, and 2mm diameters) were placed in mandibular sections of human cadavers (4 males and 3 females, average 69...
November 24, 2016: Clinical Biomechanics
https://www.readbyqxmd.com/read/27913177/effect-of-trunnion-roughness-and-length-on-the-modular-taper-junction-strength-under-typical-intraoperative-assembly-forces
#2
S Y Jauch-Matt, A W Miles, H S Gill
Modular hip implants are at risk of fretting-induced postoperative complications most likely initiated by micromotion between adjacent implant components. A stable fixation between ball head and stem-neck taper is critical to avoid excessive interface motions. Therefore, the aim of this study was to identify the effect of trunnion roughness and length on the modular taper strength under typical intraoperative assembly forces. Custom-made Titanium trunnions (standard/mini taper, smooth/grooved surface finish) were assembled with modular Cobalt-chromium heads by impaction with peak forces ranging from 2kN to 6kN...
November 29, 2016: Medical Engineering & Physics
https://www.readbyqxmd.com/read/27901228/effect-of-vertical-placement-angle-on-the-insertion-torque-of-mini-implants-in-human-alveolar-bone
#3
Rafael Ribeiro Maya, Célia Regina Maio Pinzan-Vercelino, Julio de Araujo Gurgel
Objective: The aim of the present ex-vivo study was to evaluate the effect of the vertical placement angle of mini-implants on primary stability by analyzing maximum insertion torque (MIT). Methods: Mini-implants were placed in 30 human cadavers, inserted at either a 90° or 60° angle to the buccal surface of the maxillary first molar. Out of 60 self-drilling mini-implants used, half were of the cylindrical type and half were of the conical type. Primary stability was assessed by means of measuring the MIT...
September 2016: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/27901227/evaluation-of-cytotoxicity-and-corrosion-resistance-of-orthodontic-mini-implants
#4
Celha Borges Costa Alves, Márcio Nunes Segurado, Miriam Cristina Leandro Dorta, Fátima Ribeiro Dias, Maurício Guilherme Lenza, Marcos Augusto Lenza
Objective: To evaluate and compare in vitro cytotoxicity and corrosion resistance of mini-implants from three different commercial brands used for orthodontic anchorage. Methods: Six mini-implants (Conexão(tm), Neodent(tm) and SIN(tm)) were separately immersed in artificial saliva (pH 6.76) for 30 and 60 days. The cytotoxicity of the corrosion extracts was assessed in L929 cell cultures using the violet crystal and MTT assays, as well as cell morphology under light microscopy...
September 2016: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/27896213/bone-cutting-capacity-and-osseointegration-of-surface-treated-orthodontic-mini-implants
#5
Ho-Young Kim, Sang-Cheol Kim
OBJECTIVE: The objective of the study was to evaluate the practicality and the validity of different surface treatments of self-drilling orthodontic mini-implants (OMIs) by comparing bone cutting capacity and osseointegration. METHODS: Self-drilling OMIs were surface-treated in three ways: Acid etched (Etched), resorbable blasting media (RBM), partially resorbabla balsting media (Hybrid). We compared the bone cutting capacity by measuring insertion depths into artificial bone (polyurethane foam)...
November 2016: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/27894545/ability-of-mini-implant-facilitated-micro-osteoperforations-to-accelerate-tooth-movement-in-rats
#6
Tracy Cheung, Juyoung Park, Deborah Lee, Catherine Kim, Jeffrey Olson, Shadi Javadi, Gregory Lawson, James McCabe, Won Moon, Kang Ting, Christine Hong
INTRODUCTION: Although current techniques for accelerated tooth movement often involve invasive surgical procedures, micro-osteoperforations (MOPs) using mini-implants may facilitate orthodontic tooth movement without raising flaps, reduce surgical risks, and increase patient acceptance. In this study, we evaluated the effectiveness of mini-implant-facilitated MOPs in inducing accelerated tooth movement and investigated the potential risks for root resorption. METHODS: Five MOPs were placed on the left side around the maxillary first molars in 6 rats using an automated mini-implant driver, whereas the right side received no MOPs as the control...
December 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27891469/comparison-of-anchorage-pattern-under-two-types-of-orthodontic-mini-implant-loading-during-retraction-in-type-a-anchorage-cases
#7
B Imran Khan, Gowri Sankar Singaraju, Prasad Mandava, G Vivek Reddy, Venkatesh Nettam, Venkat Naidu Bhavikati
INTRODUCTION: The orthodontic mini-screws are the mainstay of direct skeletal anchorage which requires minimal compliance and provides maximal anchorage control. However, the timing of initiation of orthodontic loading of these mini-screws is not clearly established in the available studies. AIM: The purpose of this study was to determine the reciprocal effects on mini-screw implant with immediate loading in comparison to that of delayed loading during retraction...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27888491/twist-removal-of-healed-vs-nonhealed-implants-a-mechanical-and-histological-study-in-mini-pigs
#8
Ricardo de Oliveira Silva, Fabrício Passador, Paulo Henrique Ferreira Caria
PURPOSE: The objective of this study was to evaluate the effect of removal torque (reverse torque) of titanium implants in peri-implant bone. METHODS: The P1-M1 teeth were extracted bilaterally of 6 mini pigs (BR-1). Each animal received 6 titanium implants, three for each side of mandible. On the right side of mandible, 3 implants reminded 9 months (9M) under masticatory activity and on the left side, other 3 implants were placed and immediately removed (IR). All 36 implants were removed by removal torque, and the recorded values were statistically analyzed...
December 2016: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/27888049/overdenture-prosthesis-retained-by-mini-dental-implants-a-systematic-review
#9
REVIEW
Cleidiel Aparecido Araujo Lemos, Fellippo Ramos Verri, Victor Eduardo de Souza Batista, Joel Ferreira Santiago Júnior, Caroline Cantieri Mello, Eduardo Piza Pellizzer
OBJECTIVE: The purpose of this systematic review was to evaluate the influence of mini implants to retain overdenture prosthesis in terms of survival rates of mini implants, marginal bone loss, satisfaction, and quality of life. DATA: This report followed the PRISMA Statement and PICO question. This review has been registered at PROSPERO under the number CRD42016036141. SOURCE: Two independent reviewers performed a comprehensive search of studies published until September 2016 and listed in the PubMed/MEDLINE, Embase, and The Cochrane Library databases...
November 22, 2016: Journal of Dentistry
https://www.readbyqxmd.com/read/27875257/nicotinic-acid-timed-to-feeding-reverses-tissue-lipid-accumulation-and-improves-glucose-control-in-obese-zucker-rats
#10
Tobias Kroon, Tania Baccega, Arne Olsén, Johan Gabrielsson, Nicholas D Oakes
Nicotinic acid (NiAc) is a potent inhibitor of lipolysis, acutely reducing plasma free fatty acid (FFA) concentrations. However, a major FFA rebound is seen during rapid NiAc washout and sustained exposure is associated with tolerance development, with FFA returning to pretreatment levels. Our aim was to find a rational NiAc dosing regimen which preserves FFA lowering, sufficient to reverse non-adipose tissue lipid accumulation and improve metabolic control, in obese Zucker rats. We compared feeding-period vs...
November 15, 2016: Journal of Lipid Research
https://www.readbyqxmd.com/read/27871702/comparison-of-direct-and-indirect-skeletal-anchorage-systems-combined-with-2-canine-retraction-techniques
#11
Serkan Ozkan, Mehmet Bayram
INTRODUCTION: We compared the effectiveness of 2 canine retraction springs and anchorage systems (direct and indirect skeletal anchorage) in patients requiring first premolar extractions and maximum anchorage in the maxilla. METHODS: Thirty-six patients were included (17 male, 19 female; mean age, 16.8 ± 2.4 years). A mini-implant-supported Nance appliance with indirect skeletal anchorage system was used in 18 patients and a mini-implant-supported direct skeletal anchorage system in the remaining patients...
November 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27866141/transapical-aortic-stenting-an-initial-case-series
#12
Tamer G Ghazy, Ahmed S Ouda, Ahmed M Mashhour, Manuel Wilbring, Klaus Matschke, Utz W Kappert
AIMS: The standard approach for thoracic endovascular aortic repair (TEVAR) is transfemoral; however, calcifications and tortuosity of the access vessels might be so extensive as to increase the operative risk markedly or preclude the procedure. This study evaluates the transapical approach as an alternative route for TEVAR in such patients. METHODS AND RESULTS: From June 2011 to July 2013, the institution's interdisciplinary board for aortic diseases initially denied TEVAR for eight patients with thoracic aortic pathology due to extensive calcification and tortuosity of the distal vessels...
November 20, 2016: EuroIntervention
https://www.readbyqxmd.com/read/27855634/identification-of-novel-targets-of-diabetic-nephropathy-and-pedf-peptide-treatment-using-rna-seq
#13
Ana Rubin, Anna C Salzberg, Yuka Imamura, Anzor Grivitishvilli, Joyce Tombran-Tink
BACKGROUND: Diabetic nephropathy (DN) is a major complication of type1 and type 2 diabetes. Understanding how diabetes regulate transcriptome dynamics in DN is important for understanding the biology of the disease and for guiding development of new treatments. RESULTS: We analyzed the kidney transcriptome of a DN mouse model, D2.B6-Ins2 (Akita) /MatbJ, before/after treatment with P78-PEDF. Age, weight, and gender-matched mice and wild-type (wt) littermates were treated at 6 weeks (early treatment) or 12 weeks (late treatment) of age for the duration of 6 weeks...
November 17, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27847652/orthodontic-protocol-using-mini-implant-for-class-ii-treatment-in-patient-with-special-needs
#14
Fernando Pedrin Carvalho Ferreira, Anderson Paulo Barbosa Lima, Eliana de Cássia Molina de Paula, Ana Claudia de Castro Ferreira Conti, Danilo Pinelli Valarelli, Renata Rodrigues de Almeida-Pedrin
Improving facial and dental appearance and social interaction are the main factors for special needs (SN) patients to seek orthodontic treatment. The cooperation of SN patients and their parents is crucial for treatment success. Objective. To show through a case report the satisfactory results, both functional and esthetic, in patients with intellectual disability, congenital nystagmus, and severe scoliosis. Materials Used. Pendulum device with mini-implants as anchorage unit. Results. Improvement of facial and dental esthetics, correction of Class II malocclusion, and no root resorption shown in the radiographic follow-up...
2016: Case Reports in Dentistry
https://www.readbyqxmd.com/read/27819849/effect-of-implant-diameter-on-fatigue-strength
#15
So-Yeon Song, Jeong-Yol Lee, Sang-Wan Shin
PURPOSE: To investigate the effect of implant diameter on fatigue strength using static and cyclic load test. MATERIALS AND METHODS: Four different implant systems-SuperLine (Φ4.0), NRLine (Φ3.1), SlimLine (Φ2.8, Φ2.3), and (Dentium)-were grouped by implant diameter. A static load test was conducted with 5 specimens for each group using a universal testing machine to measure the ultimate failure load (UFL). With 80% of the UFL in the weakest group, the starting load for a cyclic load test was determined and the test was performed with 8 specimens for each group...
November 3, 2016: Implant Dentistry
https://www.readbyqxmd.com/read/27813716/effects-of-low-level-laser-therapy-in-orthodontic-patients-on-immediate-inflammatory-response-after-mini-implants-insertion-a-preliminary-report
#16
Mario S Yanaguizawa, Selly S Suzuki, Elizabeth F Martinez, Hideo Suzuki, Maria Cristina J Pelegrin, Aguinaldo S Garcez
BACKGROUND: The primary stability of a mini-implant is crucial to treatment sequence since most orthodontic mini-implant failures occur at an early stage. Irritation or inflammation of peri-implant tissues has been related to decreasing mini-implant success. PURPOSE: This study evaluates the effect of low-level laser therapy on initial inflammation after orthodontic mini-implants installation. METHODS: Ten volunteers received two mini-implants (1...
November 3, 2016: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/27809213/the-t-zone-median-vs-paramedian-insertion-of-palatal-mini-implants
#17
Benedict Wilmes, Bjorn Ludwig, Sivabalan Vasudavan, Manuel Nienkemper, Dieter Drescher
No abstract text is available yet for this article.
September 2016: Journal of Clinical Orthodontics: JCO
https://www.readbyqxmd.com/read/27805872/orthodontic-traction-of-a-transmigrated-mandibular-canine-using-mini-implant-a-case-report-and-review
#18
Sonia Patricia Plaza
The patient in this case is an 11-year-old girl, whose mandibular left canine was transmigrated. The traction to the arch was assisted by using a temporary skeletal anchorage device. After 5 months of poor response to traction, the biomechanics were re-adjusted, obtaining effective traction in to the arch in 12 months. After this period, the treatment was completed with fixed orthodontic appliances.
December 2016: Journal of Orthodontics
https://www.readbyqxmd.com/read/27804205/comparative-clinical-study-of-conventional-dental-implants-and-mini-dental-implants-for-mandibular-overdentures-a-randomized-clinical-trial
#19
Weerapan Aunmeungtong, Thongnard Kumchai, Frank P Strietzel, Peter A Reichart, Pathawee Khongkhunthian
BACKGROUND: Dental implant-retained overdentures have been chosen as the treatment of choice for complete mandibular removable dentures. Dental implants, such as mini dental implants, and components for retaining overdentures, are commercially available. However, comparative clinical studies comparing mini dental implants and conventional dental implants using different attachment for implant-retained overdentures have not been well documented. PURPOSE: To compare the clinical outcomes of using two mini dental implants with Equator(®) attachments, four mini dental implants with Equator attachments, or two conventional dental implants with ball attachments, by means of a randomized clinical trial...
November 1, 2016: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/27797280/north-american-ginseng-panax-quinquefolius-suppresses-%C3%AE-adrenergic-dependent-signalling-hypertrophy-and-cardiac-dysfunction
#20
Xilan Tang, Xiaohong Tracey Gan, Venkatesh Rajapurohitam, Cathy Xiaoling Huang, Jenny Xue, Edmund M K Lui, Morris Karmazyn
There is increasing evidence for a beneficial effect of ginseng on cardiac pathology. Here, we determined whether North American ginseng can modulate the deleterious effects of the β-adrenoceptor agonist isoproterenol on cardiac hypertrophy and function using in vitro and in vivo approaches. Isoproterenol was administered for 2 weeks at either 25 mg/kg per day or 50 mg/kg per day (ISO25 or ISO50) via a subcutaneously implanted osmotic mini-pump to either control rats or those receiving ginseng (0.9 g/L in the drinking water ad libitum)...
December 2016: Canadian Journal of Physiology and Pharmacology
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