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https://www.readbyqxmd.com/read/29791691/evaluation-of-miniscrew-angulation-in-the-posterior-maxilla-using-cone-beam-computed-tomographic-image
#1
Henrique M Villela, Mario Vedovello Filho, Heloísa C Valdrighi, Milton Santamaria-Jr, Carolina Carmo de Menezes, Silvia A S Vedovello
OBJECTIVE: This study aimed at evaluating whether changes in the insertion angle is a determining factor in the positioning of the miniscrews body in a region with larger interradicular space in the posterior maxilla. METHODS: Analysis of 60 posterior maxillary quadrants were made using images obtained by means of cone-beam computed tomographic image (CBCT), with 0.076-mm voxel, which presented a real miniscrew inserted in the mesial region of the maxillary first molars, serving as reference point for the placement of the virtual miniscrews...
January 2018: Dental Press Journal of Orthodontics
https://www.readbyqxmd.com/read/29791686/extruded-upper-first-molar-intrusion-comparison-between-unilateral-and-bilateral-miniscrew-anchorage
#2
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
#3
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/29762818/titanium-alloy-vs-stainless-steel-miniscrews-an-in-vivo-split-mouth-study
#4
P Bollero, V Di Fazio, C Pavoni, M Cordaro, P Cozza, R Lione
OBJECTIVE: To compare in vivo Titanium Alloy (TiA) with Stainless Steel (SS) miniscrews Temporary Anchorage Devices (TADs) using removal torque and Scanning Electron Microscopic (SEM) analysis. PATIENTS AND METHODS: 15 subjects (6 males and 9 females) who required maximum anchorage were recruited. For each patient, a TiA TAD and a SS TAD with same length and width were implanted following a randomized split-mouth study design. Retraction was carried out with nickel-titanium spring ligated directly from the anterior hooks of the archwire to the TADs to produce 90 to 100 g of force...
April 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29744214/comparison-of-biofilm-formation-and-migration-of-streptococcus-mutans-on-tooth-roots-and-titanium-miniscrews
#5
Kittipong Laosuwan, Don Jeevanie Epasinghe, Zhaoming Wu, Wai Keung Leung, David William Green, Han Sung Jung
Periodontitis and peri-implantitis are inflammatory diseases caused by periodontal pathogenic bacteria leading to destruction of supporting periodontal/peri-implant tissue. However, the progression of inflammatory process of these two diseases is different. The bacterial biofilm is the source of bacteria during the inflammatory process. As the bacteria migrate down the surface of tooth or titanium implant, the inflammation spreads along with it. Streptococcus mutans has an important role in oral bacterial biofilm formation in early stage biofilm before the microbiota shift to late stage and become more virulent...
April 2018: Clinical and Experimental Dental Research
https://www.readbyqxmd.com/read/29714067/class-iii-malocclusion-and-bilateral-cross-bite-in-an-adult-patient-treated-with-miniscrew-assisted-rapid-palatal-expander-and-aligners
#6
Luca Lombardo, Antonella Carlucci, Bortolo Giuliano Maino, Anna Colonna, Emanuele Paoletto, Giuseppe Siciliani
This case report describes the use of a miniscrew-assisted rapid palatal expander and aligners to correct bilateral cross-bite and crowding in an adult patient with a Class III skeletal pattern. A digitally designed surgical guide was three-dimensionally printed and used to accurately insert four miniscrews into the palate; these were employed to anchor a novel miniscrew-assisted rapid palatal expander appliance without any dental anchorage. Cone-beam computed tomograms before and after miniscrew-assisted rapid palatal expander treatment demonstrated the orthopedic expansion of the maxilla without dental tipping...
May 1, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/29709324/the-clinical-outcome-of-skeletal-anchorage-in-interceptive-treatment-in-growing-patients-for-class-iii-malocclusion
#7
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...
April 27, 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
#8
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/29688893/miniscrew-anchorage-for-posterior-crossbite-correction-in-an-adult-patient
#9
Gabriela Meyge De Brito, Diana Simões, André Wilson Machado
No abstract text is available yet for this article.
March 2018: Journal of Clinical Orthodontics: JCO
https://www.readbyqxmd.com/read/29677225/occlusive-titanium-barrier-for-immediate-bone-augmentation-of-severely-resorbed-alveolar-sockets-with-secondary-soft-tissue-healing-a-2-year-case-series
#10
Fabio Perret, Federica Romano, Francesco Ferrarotti, Mario Aimetti
This case series evaluated bone dimensional changes following the application of an occlusive titanium barrier on severely resorbed fresh extraction sockets to achieve bone regeneration. Six extraction sites with buccal bone loss were filled with a xenograft and covered with a titanium plate fixed by two miniscrews and left intentionally exposed. No infection occurred. After 4 months of healing, sufficient hard tissue had formed to allow implant insertion. Mean vertical bone gain was 7.3 ± 2.2 mm at the buccal side and 4...
April 20, 2018: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/29664335/maxillary-molar-distalization-with-miniscrew-supported-appliances-in-class-ii-malocclusion-a-systematic-review
#11
Roshan Noor Mohamed, Sakeenabi Basha, Yousef Al-Thomali
OBJECTIVES: To evaluate the quantitative effects of miniscrew supported appliances for maxillary molar distalization in Class II malocclusion. MATERIALS AND METHODS: The systematic search included MEDLINE, EMBASE, CINAHL, PsychINFO, Scopus, and key journals and review articles. The date of the last search was January 30, 2017. Methodological quality of the retrospective studies was graded by means of the Quality Assessment Tool for Quantitative Studies, developed for the Effective Public Health Practice Project (EPHPP) and prospective studies by means of Newcastle-Ottawa Scale...
April 17, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/29644389/is-there-an-optimal-initial-amount-of-activation-for-midpalatal-suture-expansion-a-histomorphometric-and-immunohistochemical-study-in-a-rabbit-model
#12
Akram S Alyessary, Adrian U Yap, Siti A Othman, Mohammad T Rahman, N M Al-Namnam, Zamri Radzi
OBJECTIVE: Accelerated bone-borne expansion protocols on sutural separation and sutural bone formation were evaluated via histomorphometry and immunohistochemistry to determine the optimal initial activation without disruption of bone formation. MATERIALS AND METHODS: Sixteen New Zealand white rabbits were randomly divided into four groups. Modified Hyrax expanders were placed across the midsagittal sutures and secured with miniscrew implants with the following activations: group 1 (control), 0...
April 11, 2018: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
https://www.readbyqxmd.com/read/29602342/anatomic-assessment-of-the-mandibular-buccal-shelf-for-miniscrew-insertion-in-white-patients
#13
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/29590700/-results-of-the-reconstruction-of-the-middle-phalangeal-base-of-the-finger-through-an-osteochondral-autograft-from-the-hamate-bone
#14
Thomas Pillukat, Karlheinz Kalb, Joachim Windolf, Jörg van Schoonhoven
OBJECTIVE: The fractured base of the middle phalanx was reconstructed in 13 patients using an osteochondral transplant from the carpometacarpal joint surface of the hamate bone. The goal was to restore joint stability with preservation of mobility. Indications were acute and missed isolated destruction of the palmar middle phalanx base ≥ 30 %. Contraindications were destruction of the head of the proximal phalanx, advanced chondropathy of the head of the proximal phalanx, and extensive soft tissue injury with loss of skin coverage for the proximal interphalangeal joint...
February 2018: Handchirurgie, Mikrochirurgie, Plastische Chirurgie
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
#15
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/29576579/resonance-frequency-analysis-of-miniscrew-implant-stability
#16
Yu-Chuan Tseng, Chin-Yun Pan, Pao-Hsin Liu, Yi-Hsin Yang, Hong-Po Chang, Chun-Ming Chen
This study used resonance frequency (RF) analysis to assess miniscrew implant (MSI) stability during wound healing in a sample of 68 patients (41 women, 27 men; mean age, 27.7 years). The 104 MSIs included 66 placements in the buccal shelf (BS; 2.0 × 12 mm) and 38 placements in interradicular (IR; 1.5 × 8 mm) sites. Thirteen (12.5%) of the MSIs failed. A new RF detection device was used to measure RF at baseline (T0) and at 3 (T1), 6 (T2), 9 (T3), 12 (T4), and 15 (T5) weeks after placement. A linear mixed-effects model was fitted to change in RF values...
2018: Journal of Oral Science
https://www.readbyqxmd.com/read/29572736/anterior-management-of-c2-fractures-using-miniplate-fixation-outcome-function-and-quality-of-life-in-a-case-series-of-15-patients
#17
Axel Franke, Dan Bieler, Rebecca Wern, Tim Trotzke, Sebastian Hentsch, Erwin Kollig
PURPOSE: The classification systems by Anderson and D'Alonzo, Effendi, Benzel and others have limitations when it comes to morphologically categorising fractures of the second cervical vertebral body (C2) that present with or without an additional fracture of the dens or with or without an extension of the fracture line into the vertebral arch and displacement. Currently, there are no definitive recommendations for the treatment of fractures at the junction of the dens with the vertebral body of C2 on the basis of outcome and stability data...
March 23, 2018: European Spine Journal
https://www.readbyqxmd.com/read/29564217/evaluation-of-the-effects-of-miniscrew-incorporation-in-palatal-expanders-for-young-adults-using-finite-element-analysis
#18
Eui-Hyang Seong, Sung-Hwan Choi, Hee-Jin Kim, Hyung-Seog Yu, Young-Chel Park, Kee-Joon Lee
Objective: The aim of this study was to evaluate the stress distribution and displacement of various craniofacial structures after nonsurgical rapid palatal expansion (RPE) with conventional (C-RPE), bone-borne (B-RPE), and miniscrew-assisted (MARPE) expanders for young adults using three-dimensional finite element analysis (3D FEA). Methods: Conventional, bone-borne, and miniscrew-assisted palatal expanders were designed to simulate expansion in a 3D FE model created from a 20-year-old human dry skull...
March 2018: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/29561652/assessment-of-changes-in-the-nasal-airway-after-nonsurgical-miniscrew-assisted-rapid-maxillary-expansion-in-young-adults
#19
Soo-Yeon Kim, Young-Chel Park, Kee-Joon Lee, Andreas Lintermann, Sang-Sun Han, Hyung-Seog Yu, Yoon Jeong Choi
OBJECTIVES: To evaluate changes in the volume and cross-sectional area of the nasal airway before and 1 year after nonsurgical miniscrew-assisted rapid maxillary expansion (MARME) in young adults. MATERIALS AND METHODS: Fourteen patients (mean age, 22.7 years; 10 women, four men) with a transverse discrepancy who underwent cone beam computed tomography before (T0), immediately after (T1), and 1 year after (T2) expansion were retrospectively included in this study...
March 21, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/29542406/miniscrews-for-orthodontic-anchorage-a-review-of-available-systems
#20
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...
March 15, 2018: Journal of Orthodontics
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