keyword

Miniscrew

keyword
https://read.qxmd.com/read/32213146/effect-of-piezocision-corticotomy-on-en-masse-retraction-a-randomized-controlled-trial
#1
Abdulkarim A Hatrom, Khalid H Zawawi, Reem M Al-Ali, Hanadi M Sabban, Talal M Zahid, Ghassan A Al-Turki, Ali H Hassan
OBJECTIVES: To compare the amount of en-masse retraction with or without piezocision corticotomy, to assess the type of tooth movement, to evaluate root integrity after retraction, and to record reported pain levels. MATERIALS AND METHODS: This randomized, controlled clinical trial included 26 orthodontic patients requiring premolar extraction. The patients were divided into two groups: (1) an extraction with piezocision corticotomy group (PCG) and (2) an extraction-only group, which served as the control group (CG)...
March 26, 2020: Angle Orthodontist
https://read.qxmd.com/read/32211284/levels-of-tgf-%C3%AE-1-in-peri-miniscrew-implant-crevicular-fluid
#2
Avinash Kaur, Om Prakash Kharbanda, Moganty R Rajeswari, Dinesh Kalyanasundaram
The peri-miniscrew implant crevicular fluid is analogous to gingival crevicular fluid, and its contents reflect the state of inflammation and health during the life of the miniscrews in the mouth. The stability of MSI is fundamental to its role as an anchorage. This study aimed to evaluate transforming growth factor-beta one (TGF-β1) of the peri-miniscrew implant crevicular fluid (PMICF), on implant insertion, pre- and post-loading of MSIs to find a clue to their role in the stability of MSI. Fifty-two MSIs sites were placed in the mouths of 13 patients aged 12-26 years undergoing orthodontic treatment...
April 2020: Journal of Oral Biology and Craniofacial Research
https://read.qxmd.com/read/32166995/miniscrew-anchored-maxillary-protraction-in-growing-class-iii-patients
#3
Felicia Miranda, José Carlos da Cunha Bastos, Alexandre Magno Dos Santos, Luiz Sergio Vieira, Aron Aliaga-Del Castillo, Guilherme Janson, Daniela Garib
The aim of this article is to report a case series of a miniscrew-anchored maxillary protraction therapy (MAMP). Two male patients presenting with Class III malocclusion were included in this report. The treatment consisted of a hybrid expander and two miniscrews at the anterior region of the mandible anchoring Class III elastics for maxillary protraction. Effective maxillary length, ANB angle and Wits appraisal increased after treatment. Slight dental effects were observed. MAMP therapy produced substantial skeletal effects and might be a good treatment option for Class III growing patients...
March 13, 2020: Journal of Orthodontics
https://read.qxmd.com/read/32126307/fluorescence-image-and-microbiological-analysis-of-biofilm-retained-around-healthy-and-inflamed-orthodontic-miniscrews
#4
A S Garcez, L C Barros, M R U Fernandes, D N Fujii, S S Suzuki, R Nepomuceno
INTRODUCTION: Peri-miniscrew inflammation is one of the causes of orthodontic miniscrew failure. OBJECTIVE: The aim of this study was to correlate the quantification throughout autofluorescence images and PCR microbiologic count of biofilm retained around orthodontic miniscrew and the presence of Porphyromonas gingivalis. MATERIALS AND METHODS: Forty miniscrews used for orthodontic treatment were evaluated during orthodontic treatment, collected from patients and divided into two groups: health and inflamed miniscrews...
February 29, 2020: Photodiagnosis and Photodynamic Therapy
https://read.qxmd.com/read/32095922/effects-of-micro-osteoperforations-on-intraoral-miniscrew-anchored-maxillary-molar-distalization-a-randomized-clinical-trial
#5
RANDOMIZED CONTROLLED TRIAL
Kemal Gulduren, Hayriye Tumer, Ulas Oz
PURPOSE: The aim was to study the effects of micro-osteoperforations (MOPs) on miniscrew-supported maxillary molar distalization. METHODS: As part of a single center, split-mouth, randomized clinical trial, 20 eligible subjects were randomly recruited from patients who had applied to the orthodontics department of a university dental hospital. In the experimental group, subjects were randomized to receive MOPs to either the left or right maxillary molar region (n = 10)...
March 2020: Journal of Orofacial Orthopedics
https://read.qxmd.com/read/32039085/the-effectiveness-of-micro-osteoperforations-during-canine-retraction-a-three-dimensional-randomized-clinical-trial
#6
Basema Alqadasi, Khalid Aldhorae, Esam Halboub, Nasrin Mahgoub, Akram Alnasri, Ali Assiry, Hou Y Xia
Aim: A major challenge in orthodontics is decreasing treatment time without compromising treatment outcome. The purpose of this split-mouth trial was to evaluate micro-osteoperforations (MOPs) in accelerating orthodontic tooth movement. Materials and Methods: Eight patients of both genders were selected, age ranging between 15 and 40 years, with Class II Division 1 malocclusion. The participants in this trial with MOPs were randomly allocated to either the right or the left side, distal to the maxillary canine...
November 2019: Journal of International Society of Preventive & Community Dentistry
https://read.qxmd.com/read/32032909/influence-of-orthodontic-loading-on-biomarkers-levels-around-miniscrews
#7
Alice Spitz, Ricardo Palmier Teles, Lincoln Issamu Nojima
OBJECTIVE: The aim of this study was to evaluate the levels of Interleukin-1α (IL-1α), Interleukin-1β (IL-1β), Interleukin-1 receptor antagonist (IL-1Ra), Interleukin-10 (IL-10), Interleukin-13 (IL-13), Vascular endothelial growth factor (VEGF), Granulocyte-colony stimulating factor (G-CSF), and Growth related oncogene (GRO) in the peri-miniscrew implant crevicular fluid (MICF) under orthodontic loading. DESIGN: The study sample comprised 14 miniscrews immediately loaded and 17 unloaded ones...
January 27, 2020: Archives of Oral Biology
https://read.qxmd.com/read/31974060/maxillary-molar-distalization-in-treatment-of-angle-class-ii-malocclusion-growing-patients-uncontrolled-clinical-trial
#8
Noha Ali Abdelhady, Marwa Ali Tawfik, Shaza Mohammed Hammad
OBJECTIVE: This study was conducted to evaluate the clinical effectiveness treatment effects of a simple buccal technique for maxillary molar distalization using direct buccal skeletal anchorage. MATERIALS AND METHODS: After sample size calculation, fourteen female patients with bilateral Class II molar relationship (age 11-14 years) were selected from the clinic of the Department of Orthodontics, Faculty of Dentistry, Mansoura University, Egypt. After the application of the eligibility criteria, only eleven patients remained to final evaluation...
January 20, 2020: International Orthodontics
https://read.qxmd.com/read/31963840/degradation-and-biocompatibility-of-az31-magnesium-alloy-implants-in-vitro-and-in-vivo-a-micro-computed-tomography-study-in-rats
#9
Naohiko Kawamura, Yuya Nakao, Rina Ishikawa, Dai Tsuchida, Masahiro Iijima
In current orthodontic practice, miniscrew implants (MSIs) for anchorage and bone fixation plates (BFPs) for surgical orthodontic treatment are commonly used. MSIs and BFPs that are made of bioabsorbable material would avoid the need for removal surgery. We investigated the mechanical, degradation and osseointegration properties and the bone-implant interface strength of the AZ31 bioabsorbable magnesium alloy to assess its suitability for MSIs and BFPs. The mechanical properties of a Ti alloy (TiA), AZ31 Mg alloy (MgA), pure Mg and poly-L-lactic acid (PLA) were investigated using a nanoindentation test...
January 19, 2020: Materials
https://read.qxmd.com/read/31958372/long-term-stability-of-miniscrew-anchored-maxillary-molar-distalization-in-class-ii-treatment
#10
Till Edward Bechtold, Young-Chel Park, Kyung-Ho Kim, Heekyu Jung, Ju-Young Kang, Yoon Jeong Choi
OBJECTIVE: To investigate treatment stability of miniscrew-anchored maxillary distalization in Class II malocclusion. MATERIALS AND METHODS: This retrospective study included a distalization (n = 19) and a control (n = 19) group; a patient group with minor corrections served the control. Lateral cephalograms of 38 adult patients were taken before (T0), immediately after (T1), and 3-4 years after (T2) treatment. Horizontal and vertical movement and tipping of the maxillary first molars (U6) and central incisors (U1) were measured along with skeletal craniofacial parameters at three time points to compare the two groups regarding the achieved treatment effects and their stability...
January 20, 2020: Angle Orthodontist
https://read.qxmd.com/read/31926867/comparison-of-bone-thickness-in-infrazygomatic-crest-area-at-various-miniscrew-insertion-angles-in-dravidian-population-a-cone-beam-computed-tomography-study
#11
Arathi Murugesan, Arvind Sivakumar
INTRODUCTION: Infrazygomatic crest miniscrews are an important advancement in the field of orthodontics for anchorage reinforcement. The size of the miniscrews and the site of placement depend on the bone thickness in the infazygomatic crest area. The bone morphology and the thickness vary among different ethnicities of population. OBJECTIVES: To assess the bone thickness in the infrazygomatic crest area around the distobuccal root of the maxillary first molar using cone beam computed tomography and determine the best possible site and angulation for the placement of the miniscrew...
January 8, 2020: International Orthodontics
https://read.qxmd.com/read/31843178/soft-tissue-changes-in-patients-with-dentoalveolar-protrusion-treated-with-maximum-anchorage-a-systematic-review-and-meta-analysis
#12
REVIEW
Yan Liu, Zhen-Jin Yang, Jing Zhou, Ping Xiong, Quan Wang, Yan Yang, Yu Hu, Jiang-Tian Hu
OBJECTIVE: This meta-analysis aimed at comparing the angular and linear changes of soft tissue profile using conventional anchorage techniques and mini-implant (MI)-based space closure in patients with dentoalveolar protrusion. MATERIALS AND METHODS: Electronic databases, viz. PubMed, Embase, and Cochrane Central Register of Controlled Trials, were searched for relevant literature from their inception to December 2017 according to the specific inclusion and exclusion criteria...
December 2019: Journal of Evidence-based Dental Practice
https://read.qxmd.com/read/31816252/effectiveness-of-miniscrew-supported-maxillary-incisor-intrusion-in-deep-bite-correction-a-systematic-review-and-meta-analysis
#13
Rami Sosly, Hisham Mohammed, Mumen Z Rizk, Eias Jamous, Ahmad G Qaisi, David R Bearn
OBJECTIVES: To evaluate systematically the effectiveness of miniscrew-supported maxillary incisor intrusion compared with other nonsurgical intrusive mechanics for deep-bite correction. MATERIALS AND METHODS: Unrestricted electronic searches in Embase, Web of Science, MEDLINE, LILACS, and Cochrane's CENTRAL as well as manual searches were conducted up to August 2019. Only randomized clinical trials (RCTs) were included. Study selection, data extraction, and bias assessment were done by two independent reviewers...
December 9, 2019: Angle Orthodontist
https://read.qxmd.com/read/31815107/effect-of-archwire-stiffness-and-friction-on-maxillary-posterior-segment-displacement-during-anterior-segment-retraction-a-three-dimensional-finite-element-analysis
#14
Choon-Soo Park, Hyung-Seog Yu, Jung-Yul Cha, Sung-Seo Mo, Kee-Joon Lee
Objective: Sliding mechanics using orthodontic miniscrews is widely used to stabilize the anchorage during extraction space closure. However, previous studies have reported that both posterior segment displacement and anterior segment displacement are possible, depending on the mechanical properties of the archwire. The present study aimed to investigate the effect of archwire stiffness and friction change on the displacement pattern of the maxillary posterior segment during anterior segment retraction with orthodontic miniscrews in sliding mechanics...
November 2019: Korean Journal of Orthodontics
https://read.qxmd.com/read/31815104/predictors-of-midpalatal-suture-expansion-by-miniscrew-assisted-rapid-palatal-expansion-in-young-adults-a-preliminary-study
#15
Hyerin Shin, Chung-Ju Hwang, Kee-Joon Lee, Yoon Jeong Choi, Sang-Sun Han, Hyung Seog Yu
Objective: We sought to determine the predictors of midpalatal suture expansion by miniscrew-assisted rapid palatal expansion (MARPE) in young adults. Methods: The following variables were selected as possible predictors: chronological age, palate length and depth, midpalatal suture maturation (MPSM) stage, midpalatal suture density (MPSD) ratio, the sella-nasion (SN)-mandibular plane (MP) angle as an indicator of the vertical skeletal pattern, and the point A-nasion-point B (ANB) angle for anteroposterior skeletal classification...
November 2019: Korean Journal of Orthodontics
https://read.qxmd.com/read/31814037/safe-regions-of-miniscrew-implantation-for-distalization-of-mandibular-dentition-with-cbct
#16
Haibo Liu, Xiaoxue Wu, Jun Tan, Xiao Li
BACKGROUND: To assess the anatomy of the mandibular buccal shelf (MBS) with cone-beam computed tomography (CBCT) and to identify the region of miniscrew implantation for the distalization of mandibular dentition. MATERIALS AND METHODS: The MBS was assessed in 80 patients at four regions as follows: (i) between the buccal root of the mandibular second premolar and the mesiobuccal root of the first molar (L5b -L6mb ), (ii) between the mesiodistal root of the first molar (L6mb -L6db ), (iii) between the distobuccal root of the first molar and the mesiobuccal root of the second molar (L6db -L7mb ), and (iv) between the mesiodistal roots of the second molar (L7mb -L7db )...
December 9, 2019: Progress in Orthodontics
https://read.qxmd.com/read/31784013/the-thickness-of-posterior-buccal-attached-gingiva-at-common-miniscrew-insertion-sites-in-subjects-with-different-facial-types
#17
Özer Alkan, Yeşim Kaya
INTRODUCTION: The purpose of this study was to assess the thicknesses of maxillary and mandibular posterior buccal approximal attached gingiva at common miniscrew insertion sites, which has critical importance in determining miniscrew length, in subjects with different facial types. METHODS: One hundred seventy-four subjects with no transversal skeletal discrepancy were included in this study. The facial types of these subjects were evaluated in the sagittal and vertical directions...
December 2019: American Journal of Orthodontics and Dentofacial Orthopedics
https://read.qxmd.com/read/31781128/free-radical-production-inflammation-and-apoptosis-in-patients-treated-with-titanium-mandibular-fixations-an-observational-study
#18
Jan Borys, Mateusz Maciejczyk, Bożena Antonowicz, Jarosław Sidun, Magdalena Świderska, Anna Zalewska
Despite high biocompatibility of titanium and its alloys, this metal causes various side effects in the human body. It is believed that titanium biomaterials may induce an innate/adaptive immune response. However, still little is known about changes caused by titanium mandible implants, particularly with regard to bone healing. The latest studies showed disturbances in the antioxidant barrier, increased oxidative/nitrosative stress, as well as mitochondrial abnormalities in the periosteum covering titanium mandible fixations; nevertheless, the impact of titanium implants on free radical production, inflammation, and mandible apoptosis are still unknown...
2019: Frontiers in Immunology
https://read.qxmd.com/read/31776319/reconstruction-of-the-proximal-phalanx-head-with-a-costal-osteochondral-graft-for-a-comminuted-fracture-of-the-proximal-interphalangeal-joint
#19
Yoshihiko Satake, Mitsuhiko Nanno, Norie Kodera, Shinro Takai
We herein report a case involving a 41-year-old male carpenter who underwent costal osteochondral grafting with a pins and rubbers traction system (PRTS) for a complex cartilage defect of the proximal interphalangeal (PIP) joint. He had inadvertently cut his finger incompletely off with a power saw. The skin laceration extended to the dorsal aspect of his ring finger, and he had incomplete loss of the ulnar condyle and comminution of the radial condyle of the proximal phalanx of the PIP joint. He was diagnosed with an intra-articular PIP joint open fracture of the left ring finger with a 60% defect of the proximal phalanx joint surface...
November 28, 2019: Journal of Nippon Medical School
https://read.qxmd.com/read/31771579/reliability-and-validity-of-miniscrews-as-references-in-cone-beam-computed-tomography-and-intraoral-scanner-digital-models-study-on-goat-heads
#20
Yiran Jiang, Gui Chen
BACKGROUND: Miniscrews have been used to superimpose three-dimensional (3D) craniofacial images as well as explore stable structures in jaws. Our purpose was to evaluate the reliability and validity of linear and angular measurements made with miniscrews on a 3D cone-beam computed tomography (CBCT) at two voxel sizes and compared to models created by an intraoral scanner (IOS). METHODS: Altogether, 64 miniscrews were placed in 12 goat jaws. The jaws were scanned by CBCT machine at 0...
November 27, 2019: BMC Oral Health
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