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Miniscrew

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https://www.readbyqxmd.com/read/28717633/cementum-and-dentin-repair-following-root-damage-caused-by-the-insertion-of-self-tapping-and-self-drilling-miniscrews
#1
Majid Ghanbarzadeh, Farzin Heravi, Reihaneh Abrishamchi, Hooman Shafaee, Narges Ghazi, Parya Heravi, Hamid Ghanbarzadeh
OBJECTIVE: The aim of this study was to evaluate the histological responses of cementum, root dentin, and pulp following intentional root injuries caused via self-tapping and self-drilling miniscrews. MATERIALS AND METHODS: Fourteen patients (with a mean age of 15.7 years and age range of 14-18 years) who were scheduled for the extraction of all four first premolars as part of their orthodontic treatment plan participated in this study. The roots of the right and the left quadrants' first premolars were designedly injured using self-tapping miniscrews and self-drilling miniscrews, respectively...
July 2017: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/28670565/effects-of-recycling-on-the-biomechanical-characteristics-of-retrieved-orthodontic-miniscrews
#2
Soon-Dong Yun, Sung-Hwan Choi, Jung-Yul Cha, Hyung-Seog Yu, Kwang-Mahn Kim, Jin Kim, Chung-Ju Hwang
OBJECTIVE: The aim of this study was to compare recycled and unused orthodontic miniscrews to determine the feasibility of reuse. The comparisons included both miniscrews with machined surfaces (MS), and those with etched surfaces (ES). METHODS: Retrieved MS and ES were further divided into three subgroups according to the assigned recycling procedure: group A, air-water spray; group B, mechanical cleaning; and group C, mechanical and chemical cleaning. Unused screws were used as controls...
July 2017: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/28668944/miniscrew-supported-orthodontic-pseudo-ankylosis-for-mesialization-of-a-lower-third-molar
#3
Nicola Derton, Daniela Lupini, Mauro Cozzani
No abstract text is available yet for this article.
May 2017: Journal of Clinical Orthodontics: JCO
https://www.readbyqxmd.com/read/28651755/miniscrew-assisted-customized-lingual-appliances-for-predictable-treatment-of-skeletal-class-ii-malocclusion-with-severe-deep-overbite-and-overjet
#4
Xue-Dong Wang, Fei-Fei Lei, Da-Wei Liu, Jie-Ni Zhang, Wei-Tao Liu, Yang Song, Yan-Heng Zhou
This report describes the use of miniscrew-assisted customized lingual fixed appliances in a patient with severe skeletal Class II malocclusion. The patient was a 12-year-old Chinese girl with the chief complaint of protrusive lips and anterior teeth. Her diagnosis included a skeletal Class II relationship with maxillary protrusion, a backward-rotated mandible, a full Angle Class II molar relationship, and severe deep overjet and overbite. Four premolars were extracted, and miniscrew anchorage was placed in the maxillary posterior lingual segment to provide maximum anchorage and to achieve vertical control of the intruding molars...
July 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28611332/gingival-tissue-proliferation-into-the-tooth-following-iatrogenic-miniscrew-insertion-a-newer-underreported-complication
#5
Thavarajah Rooban, Nathamuni Rengarajan Krishnaswamy, Valai Kasim Shakeel Ahmed
Miniscrew implant (MSI) has been reported to be an excellent, supportive orthodontic anchorage tool. The placement of MSI is not free from complication and foremost of which is penetration of MSI into the vital tooth structures. This case report is probably the first to report a newer underreported complication. Interestingly, a small bit of gingival tissue was found deep inside the dentin of the tooth, surviving and proliferating in the MSI-damaged zone. This case report is probably the first to give direct histological evidence in humans that a MSI can cause implantation phenomenon which has the potential to give rise to numerous pathologies including pulpal, periodontal, and cystic transformation...
March 2017: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28558821/comparative-evaluation-of-insertion-torque-and-mechanical-stability-for-self-tapping-and-self-drilling-orthodontic-miniscrews-an-in-vitro-study
#6
Michele Tepedino, Francesco Masedu, Claudio Chimenti
BACKGROUND: The aim of the present study was to evaluate the relationship between insertion torque and stability of miniscrews in terms of resistance against dislocation, then comparing a self-tapping screw with a self-drilling one. METHODS: Insertion torque was measured during placement of 30 self-drilling and 31 self-tapping stainless steel miniscrews (Leone SpA, Sesto Fiorentino, Italy) in synthetic bone blocks. Then, an increasing pulling force was applied at an angle of 90° and 45°, and the displacement of the miniscrews was recorded...
May 30, 2017: Head & Face Medicine
https://www.readbyqxmd.com/read/28554462/treatment-of-class-ii-malocclusion-with-mandibular-skeletal-anchorage
#7
Ezgi Cakir, Siddik Malkoç, Mustafa Kirtay
INTRODUCTION: The aim of this case report was to present the dentofacial changes obtained with bone anchorage in a Class II patient with moderate to severe crowding. METHODS: A boy, aged 14.5 years, with a dolichofacial type, convex profile, and skeletal and dental Class II relationships was examined. After evaluation, functional treatment with bone anchorage and 4 first premolar extractions was decided as the treatment approach. Miniplates were placed on the buccal shelves of the mandibular third molars...
June 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28550914/self-drilling-and-self-tapping-miniscrews-for-osteosynthesis-fixture-after-lefort-i-osteotomy-an-ex%C3%A2-vivo-trial-for-primary-stability-and-a-randomized-clinical-study
#8
Irina Bolm, Elisabeth Goetze, Peer W Kämmerer, Robert Sader, Michelle Klos, Constantin Landes, Bilal Al-Nawas
BACKGROUND: Self-drilling osteosynthesis screws (SDS) have a potential higher primary stability together with clinical advantages such as less time effort compared to self-tapping screws (STS). The aims of the study were to compare the primary stability of SDS and STS ex vivo and to analyze of the time-saving effect in vivo. MATERIALS AND METHODS: Ex vivo, both screws were placed in porcine bone. Torque was measured for insertion and removal. Four specimens were kept in bone for histologic bone-to-implant-contact examination...
May 15, 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/28457276/nonsurgical-correction-using-miniscrew-assisted-vertical-control-of-a%C3%A2-severe-high-angle-with-mandibular-retrusion-and-gummy-smile-in-an-adult
#9
Xue-Dong Wang, Jie-Ni Zhang, Da-Wei Liu, Fei-Fei Lei, Wei-Tao Liu, Yang Song, Yan-Heng Zhou
Orthodontic treatment in adult patients with a skeletal discrepancy can be challenging. In this case report, we achieved both sagittal and vertical control by combining the classic sliding mechanics straight-wire technique with miniscrew anchorage. We treated a 21-year-old Chinese woman with a severe high mandibular plane angle, a retrusive chin, and a gummy smile. Her diagnosis included a skeletal Class II skull base with a mild anterior open bite, a protrusive maxilla, and a backwardly rotated mandible. This case underscores the importance of anchorage control in both the sagittal and vertical directions...
May 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28449060/the-influence-of-miniscrew-insertion-torque
#10
Melissa V Nguyen, John Codrington, Lloyd Fletcher, Craig W Dreyer, Wayne J Sampson
Objective: The aim of this in vitro study was to evaluate the progressive development of surface microdamage produced following the insertion of orthodontic miniscrews (OMs) into 1.5 mm thick porcine tibia bone using maximum insertion torque values of 12 Ncm, 18 Ncm, and 24 Ncm. Methods: Aarhus OMs (diameter 1.5 mm; length 6 mm) were inserted into 1.5 mm porcine bone using a torque limiting hand screwdriver set at 12 Ncm, 18 Ncm, and 24 Ncm. A custom rig equipped with a compression load cell was used to record the compression force exerted during manual insertion...
April 24, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28425833/management-of-missing-second-premolars-using-miniscrews-an-elective-solution-for-critical-anchorage-conditions
#11
Aldo Giancotti, Federica Paoncelli, Francesco Germano
Growing patients with congenital missing second premolars should be accurately evaluated in order to establish an appropriate treatment plan. The decision whether to close or maintain spaces in dental arches caused by missing teeth should be based on the consideration of biomechanical factors and the aesthetic traits of individual patients. Accordingly, the choice of closing spaces requires an adequate consideration of biomechanical principles in order to avoid detrimental effects on the occlusion and profile...
April 20, 2017: Journal of Orthodontics
https://www.readbyqxmd.com/read/28402521/efficiency-of-piezosurgery-technique-in-miniscrew-supported-en-masse-retraction-a-single-centre-randomized-controlled-trial
#12
Nilüfer Irem Tunçer, Ayça Arman-Özçirpici, Bahar Füsun Oduncuoglu, Jülide Sedef Göçmen, Alpdogan Kantarci
No abstract text is available yet for this article.
April 11, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28389179/bone-anchored-intermaxillary-elastics-in-an-asymmetric-class-ii-malocclusion-a-case-report
#13
Antonio Manni, Daniela Lupini, Mauro Cozzani
PURPOSE: A 13-year-old male patient, presenting a Class II, division 1 malocclusion and crowding was treated by an innovative technique. METHODS: After rapid palatal expansion by a Hyrax appliance, the teeth were bonded with straightwire brackets. Two miniscrews were inserted, one per side, in the mandibular buccal bone between the roots of the mandibular first molar and the second premolar. On the right side, the miniscrew implant was connected to the hook clamped on a 0...
April 4, 2017: International Orthodontics
https://www.readbyqxmd.com/read/28339580/the-integration-of-orthodontic-miniscrews-under-mechanical-loading-a-pre-clinical-study-in-rabbit
#14
B Giuliano Maino, Alberto Di Blasio, Davide Spadoni, Francesca Ravanetti, Carlo Galli, Antonio Cacchioli, Christos Katsaros, Mauro Gandolfini
Introduction: Orthodontic miniscrews are an increasingly popular choice to achieve absolute anchorage. The temporary use of miniscrews and their recent introduction have limited the debate over the biological aspect of the materials to that of the surface that permeates the field of dental implants. The aim of the present study was to investigate the integration of grade 5 titanium mini-implants with machined or sand blasted acid etched surface (SAE) under mechanical load in a rabbit tibia model of implant integration...
January 18, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28337417/skeletal-and-dentoalveolar-changes-after-miniscrew-assisted-rapid-palatal-expansion-in-young-adults-a-cone-beam-computed-tomography-study
#15
Jung Jin Park, Young-Chel Park, Kee-Joon Lee, Jung-Yul Cha, Ji Hyun Tahk, Yoon Jeong Choi
OBJECTIVE: The aim of this study was to evaluate the skeletal and dentoalveolar changes after miniscrew-assisted rapid palatal expansion (MARPE) in young adults by cone-beam computed tomography (CBCT). METHODS: This retrospective study included 14 patients (mean age, 20.1 years; range, 16-26 years) with maxillary transverse deficiency treated with MARPE. Skeletal and dentoalveolar changes were evaluated using CBCT images acquired before and after expansion. Statistical analyses were performed using paired t-test or Wilcoxon signed-rank test according to normality of the data...
March 2017: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/28328995/effectiveness-of-interceptive-treatment-of-class-iii-malocclusions-with-skeletal-anchorage-a-systematic-review-and-meta-analysis
#16
Jorge Rodríguez de Guzmán-Barrera, Carla Sáez Martínez, Montserrat Boronat-Catalá, Jose María Montiel-Company, Vanessa Paredes-Gallardo, José Luís Gandía-Franco, José Manuel Almerich-Silla, Carlos Bellot-Arcís
Recently, new strategies for treating class III malocclusions have appeared. Skeletal anchorage appears to reduce the dentoalveolar effects while maximising the orthopaedic effect in growing patients. The purpose of this systematic review and meta-analysis is to examine the effectiveness of bone anchorage devices for interceptive treatment of skeletal class III malocclusions. Searches were made in the Pubmed, Embase, Scopus and Cochrane databases, as well as in a grey literature database, and were complemented by hand-searching...
2017: PloS One
https://www.readbyqxmd.com/read/28280726/developing-customized-dental-miniscrew-surgical-template-from-thermoplastic-polymer-material-using-image-superimposition-cad-system-and-3d-printing
#17
Yu-Tzu Wang, Jian-Hong Yu, Lun-Jou Lo, Pin-Hsin Hsu, CHun-Li Lin
This study integrates cone-beam computed tomography (CBCT)/laser scan image superposition, computer-aided design (CAD), and 3D printing (3DP) to develop a technology for producing customized dental (orthodontic) miniscrew surgical templates using polymer material. Maxillary bone solid models with the bone and teeth reconstructed using CBCT images and teeth and mucosa outer profile acquired using laser scanning were superimposed to allow miniscrew visual insertion planning and permit surgical template fabrication...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28257734/safe-zones-for-miniscrews-in-maxillary-dentition-distalization-assessed-with-cone-beam-computed-tomography
#18
Haibo Liu, Xiaoxue Wu, Lei Yang, Yin Ding
INTRODUCTION: The purpose of this study was to assess the anatomic structure of the buccal alveolar bone in the infrazygomatic crest region with cone-beam computed tomography to locate safe zones for miniscrews in maxillary dentition distalization. METHODS: The buccal alveolar bone was analyzed in 3 regions of 60 patients: between the maxillary second premolar and first molar (U5-U6), between the mesiodistal roots of the first molar (U6), and between the maxillary first and second molars (U6-U7)...
March 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28257728/effectiveness-of-orthodontic-miniscrew-implants-in-anchorage-reinforcement-during-en-masse-retraction-a-systematic-review-and-meta-analysis
#19
REVIEW
Joanna Antoszewska-Smith, Michał Sarul, Jan Łyczek, Tomasz Konopka, Beata Kawala
INTRODUCTION: The aim of this systematic review was to compare the effectiveness of orthodontic miniscrew implants-temporary intraoral skeletal anchorage devices (TISADs)-in anchorage reinforcement during en-masse retraction in relation to conventional methods of anchorage. METHODS: A search of PubMed, Embase, Cochrane Central Register of Controlled Trials, and Web of Science was performed. The keywords were orthodontic, mini-implants, miniscrews, miniplates, and temporary anchorage device...
March 2017: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/28245438/an-upper-molar-distalizer-with-palatal-miniscrew-anchorage
#20
Ayman El Nigoumi
No abstract text is available yet for this article.
December 2016: Journal of Clinical Orthodontics: JCO
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