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Miniscrew

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https://www.readbyqxmd.com/read/28611332/gingival-tissue-proliferation-into-the-tooth-following-iatrogenic-miniscrew-insertion-a-newer-underreported-complication
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
Ayman El Nigoumi
No abstract text is available yet for this article.
December 2016: Journal of Clinical Orthodontics: JCO
https://www.readbyqxmd.com/read/28243866/measuring-3d-orthodontic-actions-to-guide-clinical-treatments-involving-coil-springs-and-miniscrews
#17
Margherita Mencattelli, Elisa Donati, Pasqua Spinelli, Massimo Cultrone, Cesare Luzi, Daniele Cantarella, Cesare Stefanini
The understanding of the phenomena at the base of tooth movement, due to orthodontic therapy, is an ambitious topic especially with regard to the "optimal forces" able to move teeth without causing irreversible tissue damages. To this aim, a measuring platform for detecting 3D orthodontic actions has been developed. It consists of customized load cells and dedicated acquisition electronics. The force sensors are able to detect, simultaneously and independently of each other, the six orthodontic components which a tooth is affected by...
March 2017: Biomedical Microdevices
https://www.readbyqxmd.com/read/28127540/total-intrusion-and-distalization-of-the-maxillary-arch-to-improve-smile-esthetics
#18
Eui Seon Baek, Soonshin Hwang, Kyung-Ho Kim, Chooryung J Chung
This case report illustrates the successful treatment of a patient with skeletal Class II malocclusion and an unesthetic smile involving excessive gingival display and large buccal corridors. By applying dual buccal interradicular miniscrews, total intrusion of the maxillary dentition along with distalization was induced to improve both the occlusion and smile esthetics. In addition to the conventional cephalometric superimposition, three-dimensional superimposition was performed and evaluated to validate the treatment outcome...
January 2017: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/28114243/facial-growth-patterns-and-insertion-sites-of-miniscrew-implants
#19
Fariborz Amini, Minoo Alipanahi, Vahid Rakhshan, Shahriar Shahab, Anooshe Niktash
INTRODUCTION: We aimed to evaluate the associations between the craniofacial growth pattern with interradicular distances (IRDs), cortical widths (CWs), and jaw heights (JHs). Also, we mapped safe zones for miniscrew implantation. METHODS: Cone-beam computerized tomography data pertaining to 60 Class-I patients were divided into 3 growth groups: normal, horizontal, and vertical. IRDs and CWs were measured for bimaxillary canines to second molars, on buccal and lingual sides, at 3 transverse planes (1, 3, and 5 mm apically to the alveolar crest)...
February 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28107130/the-use-of-miniscrews-in-orthodontics-a-review-of-selected-clinical-applications
#20
Eliakim Mizrahi
This paper provides a brief review of the history and development of mini screws and presents its structural features, with particular reference to the screw sizes relevant to clinical orthodontics, site selection and the different placement techniques. It covers the clinical applications of miniscrews, incorporating the principle of direct and indirect anchorage as well as the use of intraoral auxiliaries for distal movement of molars. The role of palatal miniscrews for retraction of anterior teeth, and when used in combination with buccal miniscrews for intrusion of buccal teeth is also covered along with the possible causes of miniscrew failure...
November 1, 2016: Primary Dental Journal
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