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orthodontic miniscrew

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https://www.readbyqxmd.com/read/30321328/a-comparative-histomorphological-and-micro-computed-tomography-study-of-the-primary-stability-and-the-osseointegration-of-the-sydney-mini-screw-a-qualitative-pilot-animal-study-in-new-zealand-rabbits
#1
Anastasia Bakopoulou, Peter Hoang, Ali Fathi, Matthew Foley, Colin Dunstan, Oyku Dalci, Alexandra K Papadopoulou, M Ali Darendeliler
Objective: The aim of this study was to assess the potential of improving orthodontic miniscrews' (MSs) primary stability in vivo by evaluating the dispersion capacity of an injectable bone graft substitute (iBGS) through a newly designed hollow MS [The Sydney Mini Screw (SMS)] and its integration with the cortical and trabecular bone by using the femur and tibia in a New Zealand rabbit animal model. Methods: In total, 24 MSs were randomly placed in each proximal tibia and femur of 6 New Zealand rabbits with an open surgery process...
October 12, 2018: European Journal of Orthodontics
https://www.readbyqxmd.com/read/30246217/role-of-anatomical-sites-and-correlated-risk-factors-on-the-survival-of-orthodontic-miniscrew-implants-a-systematic-review-and-meta-analysis
#2
REVIEW
Hisham Mohammed, Khaled Wafaie, Mumen Z Rizk, Mohammed Almuzian, Rami Sosly, David R Bearn
OBJECTIVES: The aim of this review was to systematically evaluate the failure rates of miniscrews related to their specific insertion site and explore the insertion site dependent risk factors contributing to their failure. SEARCH METHODS: An electronic search was conducted in the Cochrane Central Register of Controlled Trials (CENTRAL), Web of Knowledge, Scopus, MEDLINE and PubMed up to October 2017. A comprehensive manual search was also performed. ELIGIBILITY CRITERIA: Randomised clinical trials and prospective non-randomised studies, reporting a minimum of 20 inserted miniscrews in a specific insertion site and reporting the miniscrews' failure rate in that insertion site, were included...
September 24, 2018: Progress in Orthodontics
https://www.readbyqxmd.com/read/30230377/effect-of-loaded-orthodontic-miniscrew-implant-on-compressive-stresses-in-adjacent-periodontal-ligament
#3
Mhd Hassan Albogha, Ichiro Takahashi
OBJECTIVES: To describe the relationship between the proximity of miniscrew implants (MSIs) to the periodontal ligament (PDL) and stress in the PDL under different load magnitudes and different bone properties. MATERIALS AND METHODS: Sixteen subject-specific finite element models of the region of the maxillary first molar and second premolar were developed using computed tomography images of four patients. For each patient, an MSI surface model derived from micro-computed tomography was placed at four different distances from the premolar PDL...
September 19, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30199066/-the-mesialization-of-molars-of-the-lower-jaw-after-performance-surgical-manipulation-with-using-miniscrew-anchorage-approach
#4
O I Arsenina, V E Kozachenko, A G Nadtochiy, M Y Fomin, N V Popova
Process of the mesialization of molars in the lower jaw is long-time, moreover the molars are not frequently bodily translation. Conduction of the corticotomy reduce to regional acceleration phenomen that permit to accelerate the tooth movement avoiding negative inclination. PURPOSE: To improve the effectiveness of the treatment using piezocorticotomy and miniscrew anchorage approach in cases of third and second molar mesialization when first molar is missing. MATERIAL AND METHODS: 24 patients (10 men/14 women) aged 25-40 years with a fixed vestibular braces and the absence of molars on the lower jaw...
2018: Stomatologii︠a︡
https://www.readbyqxmd.com/read/30150488/ions-release-evaluation-and-changes-in-mini-implant-orthodontic-surface
#5
Marcelo K Suzuki, Danielle Ar Martins, Marília T Costa, Andreia C Ferreira, Flavio Ac Ferreira
AIM: To evaluate, in vitro, the mini-implant surface changes and the release of ions after immersion in artificial saliva during follow-up of 60 and 120 days. MATERIALS AND METHODS: As for the surface features, examined in a scanning electron microscope (SEM), before and after immersion in artificial saliva, there was a rough and uneven surface, suggestive of corrosion areas for the two trademarks evaluated after 120 days of immersion. The extracts generated in artificial saliva analysis were submitted to energy dispersive spectroscopy to identify the solid corrosion products produced on the surfaces of miniscrews...
August 1, 2018: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/30112510/intraoral-molar-distalization-with-intraosseous-mini-screw
#6
Mihri Amasyalı, Fidan Alakuş Sabuncuoğlu, Uğur Oflaz
The aim of the present study was to evaluate the effects of the miniscrew-supported, modified Hyrax appliance on bilateral distalization of posterior teeth. A 15-year-old girl with Class II malocclusion (end-to-end molar relationships, space deficiency for maxillary canine) underwent orthodontic treatment. The patient rejected tooth extraction. Then, she was treated with the miniscrew-supported, modified Hyrax appliance. An activation of 1 mm per month was planned. Lateral cephalometric views were used to evaluate distal movement...
March 2018: Turkish journal of orthodontics
https://www.readbyqxmd.com/read/30080111/nonsurgical-orthodontic-treatment-of-a-hypodivergent-adult-patient-with-bilateral-posterior-scissors-bite-and-excessive-overjet
#7
Masahiro Nakamura, Noriaki Kawanabe, Rie Adachi, Takashi Yamashiro, Hiroshi Kamioka
This report illustrates successful nonsurgical orthodontic treatment of a hypodivergent adult patient with bilateral posterior scissors bite (Brodie bite) and excessive overjet. A 26-year-old woman primarily reported maxillary incisor protrusion. She was diagnosed with Class ll division 1 malocclusion with skeletal Class I, short face, low mandibular plane angle and bilateral posterior scissors bite. A lingual arch with anterior bite block and posterior miniscrews with preadjusted edgewise appliances were used to improve the bilateral scissors bite...
August 6, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/30066695/miniscrew-composition-transmucosal-profile-and-cortical-bone-thickness-a-three-dimensional-finite-element-analysis-of-stress-fields
#8
Joana Eg Yépez, Renata M Marangon, Armando Y Saga, Key F de Lima, Orlando M Tanaka
AIM: The aim of this study was to use the finite-element method (FEM) to analyze the stress fields generated in miniscrews (MSs) and surrounding bone on applying a force perpendicular to the MS according to variations in the cortical bone thickness and changes in the transmucosal profile length and MS composition. MATERIALS AND METHODS: Miniscrews with stainless steel (SS) and titanium alloy mechanical properties with a 1 to 2 mm transmucosal profile inserted in bone blocks with cortical bone of varying thickness (1 and 2 mm) were three-dimensionally modeled using computer-aided design (CAD) and examined using FEM...
July 1, 2018: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/30059839/failure-load-and-stress-analysis-of-orthodontic-miniscrews-with-different-transmucosal-collar-diameter
#9
Maria Francesca Sfondrini, Paola Gandini, Roberto Alcozer, Pekka K Vallittu, Andrea Scribante
Miniscrews have been introduced in orthodontics as temporary anchorage devices (TADs), in order to move the correct teeth and avoid other elements to slide toward a wrong direction. Moreover the ease of use of TADs encouraged clinicians to use miniscrews also for non-conventional purposes, as fixation in mandibular fracture, mini-implant supported temporary pontics, miniscrew-assisted rapid palatal expanders and distalizers. These applications develop higher forces, so TAD fracture can be an unwanted complication...
November 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/30014178/in-vitro-biocompatibility-of-orthodontic-miniscrews-with-human-gingival-fibroblast-and-saos-2-osteoblast-cultures
#10
Hannah Finke, Bernd Koos, Helge Fischer-Brandies, Martha Es-Souni
PURPOSE: Miniscrews are an important choice for orthodontic anchorage. Yet reports on failures do exist, and attempts have been made to elucidate the causes. Clinical outcomes may be compromised not only by the mechanical implications of miniscrew design and the location of anchorage but also by poor biocompatibility. Hence, this study deals with the surface roughness and elemental composition of miniscrews and how these properties may affect the in vitro biocompatibility of four commercially available miniscrews...
September 2018: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/29976856/reliability-of-orthodontic-miniscrews-bending-and-maximum-load-of-different-ti-6al-4v-titanium-and-stainless-steel-temporary-anchorage-devices-tads
#11
Andrea Scribante, Mona A Montasser, Eman Saad Radwan, Luisa Bernardinelli, Roberto Alcozer, Paola Gandini, Maria Francesca Sfondrini
Temporary anchorage devices (TADs) have been introduced into orthodontic clinical practice in order to allow tooth movements while avoiding strain on adjacent teeth. Miniscrews are available in the market with different diameters and materials. Accordingly, the purpose of the present report was to measure and compare the forces to bend and fracture different mini implants. Ti-6Al-4V titanium and stainless steel TADs of different manufacturers (Spider ScrewHDC; Mini Implants⁻Leone; Benefit⁻Orteam; Storm⁻Kristal) were evaluated...
July 5, 2018: Materials
https://www.readbyqxmd.com/read/29911067/molar-protraction-using-miniscrews-temporary-anchorage-device-with-simultaneous-correction-of-lateral-crossbite-an-orthodontic-case-report
#12
Kavitha Odathurai Marusamy, Saravanan Ramasamy, Othman Wali
Early loss of permanent teeth, congenitally missing lateral incisors or second premolars, extremely displaced or impacted canines, all result in a reduced upper dentition. That leads to the development of crossbite in the maxillary dentition. Partial denture prosthesis, dental implants, and space closure by fixed orthodontics are the various means of treating the edentulous spaces. Protraction of molars is time taking and challenging. Temporary anchorage device (TAD) helps to protract molars without anchorage loss...
May 2018: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/29791686/extruded-upper-first-molar-intrusion-comparison-between-unilateral-and-bilateral-miniscrew-anchorage
#13
Mari Miura Sugii, Bruno de Castro Ferreira Barreto, Waldemir Francisco Vieira-Júnior, Katia Regina Izola Simone, Ataís Bacchi, Ricardo Armini Caldas
OBJECTIVE: The aim of his study was to evaluate the stress on tooth and alveolar bone caused by orthodontic intrusion forces in a supraerupted upper molar, by using a three-dimensional Finite Element Method (FEM). METHODS: A superior maxillary segment was modeled in the software SolidWorks 2010 (SolidWorks Corporation, Waltham, MA, USA) containing: cortical and cancellous bone, supraerupted first molar, periodontal tissue and orthodontic components. A finite element model has simulated intrusion forces of 4N onto a tooth, directed to different mini-screw locations...
January 2018: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/29765914/nonsurgical-treatment-and-stability-of-an-adult-with-a-severe-anterior-open-bite-malocclusion
#14
Aldo Otazú Cambiano, Guilherme Janson, Diego Coelho Lorenzoni, Daniela Gamba Garib, Dino Torres Dávalos
OBJECTIVES: A skeletal anterior open-bite is a challenging malocclusion for the orthodontist due to the difficulty and instability of correction. Treatment options for the adult patient include extractions, anterior extrusion with intermaxillary elastics, posterior intrusion using skeletal anchorage, occlusal adjustment, and orthognathic surgery. Patient compliance plays a key role in posttreatment stability. The present case report demonstrates the orthodontic treatment of an adult patient who presented with a complex open-bite malocclusion...
2018: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/29709324/the-clinical-outcome-of-skeletal-anchorage-in-interceptive-treatment-in-growing-patients-for-class-iii-malocclusion
#15
REVIEW
J Meyns, D M Brasil, J F Mazzi-Chaves, C Politis, R Jacobs
A systematic review of the literature was performed regarding the clinical outcome (effectiveness) of bone anchorage devices in interceptive treatment for class III malocclusion. A search of Embase, PubMed and Web of Science databases yielded 285 papers. An additional two articles were retrieved through manual searching of the reference lists. After initial abstract selection, 32 potentially eligible articles were screened in detail, resulting in a final number of eight articles included in this review. Insufficient evidence was found regarding the effects of skeletal anchorage in interceptive class III treatment to support definitive conclusions on long-term skeletal effects and stability...
August 2018: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29691558/-study-of-three-dimensional-anatomical-relationship-between-infrazygomatic-crest-and-maxillary-sinus-for-mini-screw-insertion
#16
Peng Wang, Zheng-Xi Chen, Jun Wu, Zhen-Qi Chen
PURPOSE: To measure the thickness of the infrazygomatic(IZ) crest above the maxillary first molar and analyze its relationship with maxillary sinus as to derive clinical implications and provide guidance for placements of orthodontic mini-screw. METHODS: Thirty seven cone-beam CT(CBCT) images of infrazygomatic crest sites were collected from data of 19 adult inter-treatment orthodontic patients. Based on the relationship of maxillary sinus floor and mesiobuccal root of the maxillary first molar, the subjects were divided into high sinus floor group (n=13) and low sinus floor group (n=24)...
December 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/29602342/anatomic-assessment-of-the-mandibular-buccal-shelf-for-miniscrew-insertion-in-white-patients
#17
Tarek Elshebiny, Juan Martin Palomo, Sebastian Baumgaertel
INTRODUCTION: Cortical bone thickness, bone width, insertion depth, and proximity to nerves are important factors when planning and placing orthodontic miniscrews. The objective of this study was to anatomically assess the mandibular buccal shelf in a white patient population as the insertion site for orthodontic miniscrews by investigating these 4 variables. METHODS: Measurements were made on cone-beam computed tomography scans of 30 white patients (18 girls, 12 boys; mean age, 14...
April 2018: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/29581950/quantitative-evaluation-of-palatal-bone-thickness-in-patients-with-normal-and-open-vertical-skeletal-configurations-using-cone-beam-computed-tomography
#18
Piyoros Suteerapongpun, Tanapan Wattanachai, Apirum Janhom, Polbhat Tripuwabhrut, Dhirawat Jotikasthira
Purpose: To perform a comparative analysis of the palatal bone thickness in Thai patients exhibiting class I malocclusion according to whether they exhibited a normal or open vertical skeletal configuration using cone-beam computed tomography (CBCT). Materials and Methods: Thirty CBCT images of Thai orthodontic patients (15-30 years of age) exhibiting class I malocclusion with a normal or open vertical skeletal configuration were selected. Palatal bone thickness was measured in a 3...
March 2018: Imaging Science in Dentistry
https://www.readbyqxmd.com/read/29542406/miniscrews-for-orthodontic-anchorage-a-review-of-available-systems
#19
Aslam Alkadhimi, Ebrahim A Al-Awadhi
INTRODUCTION: In recent years, extensive research has introduced novel ways of reinforcing orthodontic anchorage using a variety of devices temporarily anchored in bone (miniscrews). Currently, there are numerous manufacturers with different miniscrew designs on the market. AIMS: The aim of this paper is to discuss the key design features of different miniscrew systems on the market. Furthermore, to present clinical selection criteria of miniscrews in different settings taking into account the determinant factors...
June 2018: Journal of Orthodontics
https://www.readbyqxmd.com/read/29482179/on-the-stability-efficiency-of-anchorage-self-tapping-screws-ex-vivo-experiments-on-miniscrew-implants-used-in-orthodontics
#20
Marco Migliorati, Sara Drago, Domenico Dalessandri, Alberto Lagazzo, Fabio Gallo, Marco Capurro, Armando Silvestrini-Biavati
BACKGROUND: The clinical success of orthodontic miniscrews is strictly related to primary stability, which depends on bone viscoelastic properties too. In this study, we evaluated the short time mechanical response of native bone to miniscrews, by a laboratory test based on dynamic loading. METHODS: Thirty-six segments of porcine ribs were first scanned by cone-beam computerized tomography to obtain insertion-site cortical thickness, cortical and marrow bone density...
May 2018: Journal of the Mechanical Behavior of Biomedical Materials
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