Miniscrew | Page 2

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
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
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
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
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
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
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
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
Giorgio Iodice, Giuseppe Perinetti, Bjorn Ludwig, Elena V Polishchuk, Roman S Polishchuk
This controlled in vitro study compared the effects of varying the thickness of a TiO2 layer on cellular activity using commercially available miniscrew samples with identical surface features to derive information with direct clinical impact. Titanium grade V plates with four different thicknesses of TiO2 layer/color were used: absent/gray (Control group), 40-50 nm/pink (Pink group), 130 nm/gold (Gold group) and 140 nm/rosé (Rosé group). In vitro experiments used Saos-2 cells and included cell growth analysis, phospho-Histone H3 and procollagen I staining, cell viability analysis, and a cell migration assay at 12, 24, 40 and to 48 h...
November 17, 2019: Dentistry Journal
Nausheer Ahmed, Priya Megalan, Shraddha Suryavanshi, Nishat Sidiqha, Kiran Kumar Neelakantappa
Introduction Space closure by molar protraction has always been a challenge in orthodontic treatment due to larger root surface area which requires additional anchorage. Ideally, there should be little or no tipping. However, the protraction forces, being occlusal and buccal to the centre of resistance (CR) of the tooth, cause tipping and rotations. Aim The aim of the study was to assess the effect of bracket slot and archwire dimensions on posterior tooth movement during space closure in sliding mechanics and evaluate the length of power arm to bring about translatory movement of teeth using three-dimensional finite element analysis...
September 25, 2019: Curēus
Muhammad Azeem, Arfan Ul Haq, Zubair Hassan Awaisi, Muhammad Mudassar Saleem, Muhammad Waheed Tahir, Ahmad Liaquat
INTRODUCTION: Anchorage conservation in orthodontics has always been a challenge. OBJECTIVE: The aim of this current study was to find out the failure rate of miniscrews inserted in the maxillary tuberosity (MT) region. METHODS: This pilot study consisted of 40 patients (23 female, 17 male; mean age = 20.1±8.9 years) that had received 60 MT miniscrews for orthodontic treatment. Clinical notes and pictures were used to find out the primary outcome of miniscrew failure...
2019: Dental Press Journal of Orthodontics
Türker Yücesoy, Elif Dilara Seker, Ebru Cenkcı, Arzu Yay, Alper Alkan
PURPOSE: The aim of this study was to evaluate how continuous heavy orthopedic forces affect the stability of sandblasted, large-grit, acid-etched (SLA)-surfaced miniscrew implants and surrounding bone tissue healing at three different loading periods with treatment of photobiomodulation and ozone therapy. MATERIALS AND METHODS: Miniscrew implants were applied on the tibias of 9-month-old rabbits (n = 18). The animals were randomly divided into three groups: control, photobiomodulation, and ozone therapy...
November 2019: International Journal of Oral & Maxillofacial Implants
Abdulkarim A Hatrom, Ahmed R Afify, Ali H Hassan
Class II malocclusion in nongrowing patients is a great challenge in treatment especially if the degree of malocclusion is severe. In such cases, the use of miniscrews for orthodontic camouflage can produce results comparable to that of orthognathic surgery. This case report presents an adult patient with severe Class II malocclusion combined with bilateral posterior crossbite, deep bite, a crowded lower arch, and a history of extraction of the lower right first molar. The treatment involved upper arch expansion by a quad helix appliance followed by the extraction of the right and left upper 1st premolars...
2019: Case Reports in Dentistry
C X Lyu, L Yang, L L Chen, F Y Yu, H P Lu
Rapid palatal expansion (RPE) is commonly used to correct transverse maxillary deficiencies and recognized as a reliable orthopedic procedure in children and adolescents. For adults, however, conventional RPE has been considered rarely successful and can produce undesirable dental effects. Along with the development of digital techniques and mini-implant anchorage, a novel method called miniscrew-assisted RPE (MARPE) has become available for the treatment of maxillary transverse deficiency in older patients recently...
November 9, 2019: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
Antonio Manni, Marco Migliorati, Chiara Calzolari, Armando Silvestrini-Biavati
INTRODUCTION: The aim of this pilot study was to present the preliminary results of Class II malocclusion treatment using a skeletally anchored Herbst appliance with miniscrews inserted in the maxillary and mandibular arches to improve anchorage control and skeletal effects. METHODS: The treatment group (TG) consisted of 13 patients (10 males [M], 3 females [F]; mean age of 12.8 years) with Class II Division 1 malocclusion who were treated with the Herbst appliance and miniscrews inserted in the maxillary and mandibular arches...
November 2019: American Journal of Orthodontics and Dentofacial Orthopedics
Jie Zhen, Cong-Hua Liu, Wen-Xuan Zhang, Li-Shu Zhou, Hao-Xian He, Xuan Qin, Ze-Dong Lan
No abstract text is available yet for this article.
July 2019: Journal of Clinical Orthodontics: JCO
Marcela Cristina Damião Andrucioli, Mírian Aiko Nakane Matsumoto, Sandra Yasuyo Fukada, Maria Conceição Pereira Saraiva, Ana Zilda Nazar Bergamo, Fábio Lourenço Romano, Raquel Assed Bezerra da Silva, Lea Assed Bezerra da Silva, Paulo Nelson-Filho
OBJECTIVES: Miniscrew has been frequently used, considering that anchorage control is a critical point in orthodontic treatment, and its failure, the main adverse problem. Using two groups of stable (successful) and unstable (failed) mini-implants, this in vivo study aimed to quantify proinflammatory cytokines IL-1 α, IL-6, IL-17, and TNF-α and osteoclastogenesis marker RANK, RANKL, and OPG in gingival tissue, using the real-time polymerase chain reaction technique. METHODOLOGY: Thirteen patients of both sexes (11-49 years old) under orthodontic treatment were selected, obtaining 11 successful and 7 failed mini-implants...
2019: Journal of Applied Oral Science: Revista FOB
Mohammed Almuzian, Anas Almukhtar, Aman Ulhaq, Fahad Alharbi, M Ali Darendeliler
OBJECTIVES: The aim of this prospective case series study is to assess the three-dimensional (3D) skeletal and soft tissue effects of the alternate rapid maxillary expansion and constriction (Alt-RAMEC) protocol in conjunction with a miniscrew-supported class III elastic wear in class III growing patients. MATERIALS AND METHODS: Fourteen consecutive participants (mean age 12.05 ± 1.09 years), who displayed class III malocclusions with retrognathic maxillae, were recruited...
September 18, 2019: Progress in Orthodontics
Michele Cassetta, Giulia Brandetti, Federica Altieri
Background: Maxillary molar distalization is the most frequently used nonextraction treatment in the correction of Class II malocclusion. The use of traditional intra-oral devices shows unreliable results. Nowadays the use of miniscrew-supported appliances helps prevent anchorage loss. The aim of this pilot study is to compare the amount of upper first molar distalization and the dentoalveolar side effects using traditional distal jet appliance and miniscrew-supported distal jet appliance...
July 2019: Journal of Clinical and Experimental Dentistry
Jacobo Limeres Posse, María Teresa Abeleira Pazos, María Fernández Casado, Mercedes Outumuro Rial, Pedro Diz Dios, Márcio Diniz-Freitas
The aim of this study was to quantify the available maxillary alveolar bone in a group of individuals with Down syndrome (DS) to determine the best areas for orthodontic miniscrew placement. The study group consisted of 40 patients with DS aged 12-30 years. We also selected an age and sex-matched control group. All measurements were performed on cross-sectional images obtained with cone-beam computed tomography. The selected areas of interest were the 4 interradicular spaces between the distal wall of the canine and the mesial wall of the second molar, in both maxillary quadrants...
September 10, 2019: Scientific Reports
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