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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
André Felipe Abrão, Rafael Golghetto Domingos, João Batista de Paiva, Dalva Cruz Laganá, Jorge Abrão
INTRODUCTION: Mandibular molar uprighting is indicated when mesial inclination of the second molars occurs because of missing first molars. There are many methodologies to perform such movement. In this study, we aimed to analyze and compare the stress distributions in different molar uprighting techniques. METHODS: Four photoelastic models were designed to evaluate different mandibular second molar uprighting techniques: a miniscrew positioned in the retromolar region, a beta-titanium alloy cantilever spring, a beta-titanium alloy wire with a T-loop spring, and an 0...
March 2018: American Journal of Orthodontics and Dentofacial Orthopedics
Marco Migliorati, Sara Drago, Domenico Dalessandri, Alberto Lagazzo, Fabio Gallo, Marco Capurro, Armando Silvestrini-Biavati
BACKGROUND: The clinical success of orthodontic miniscrews is strictly related to primary stability, which depends on bone viscoelastic properties too. In this study, we evaluated the short time mechanical response of native bone to miniscrews, by a laboratory test based on dynamic loading. METHODS: Thirty-six segments of porcine ribs were first scanned by cone-beam computerized tomography to obtain insertion-site cortical thickness, cortical and marrow bone density...
February 19, 2018: Journal of the Mechanical Behavior of Biomedical Materials
Giuliano Maino, Ylenia Turci, Angela Arreghini, Emanuele Paoletto, Giuseppe Siciliani, Luca Lombardo
INTRODUCTION: The purpose of this study was to describe the skeletal and dentoalveolar changes in a group of growing skeletal Class III patients treated with hybrid rapid palatal expansion and facemask. METHODS: Twenty-eight growing patients with skeletal Class III malocclusion were treated using a rapid maxillary expander with hybrid anchorage according to the ALT-Ramec protocol (SKAR III; E.P.), followed by 4 months of facemask therapy. Palatal miniscrew placement was accomplished via digital planning and the construction of a high-precision, individualized surgical guide...
February 2018: American Journal of Orthodontics and Dentofacial Orthopedics
S Enzinger, H Bürger, A Gaggl
The lateral femoral condyle (LFC) flap is a new flap first reported in 2015 for the treatment of osteomyelitis in hand surgery. This paper introduces a technique of osteochondral LFC flap harvest for mandibular condyle reconstruction and reports on the use of this flap in temporomandibular joint reconstruction. For condyle resection, a pre-auricular approach saving the temporal artery and vein is performed. A step osteotomy technique is used for condyle resection. LFC harvesting starts with dissection of the popliteal artery and vein...
January 17, 2018: International Journal of Oral and Maxillofacial Surgery
Jae Hyun Park, Kiyoshi Tai, Miwa Ikeda
No abstract text is available yet for this article.
November 2017: Journal of Clinical Orthodontics: JCO
Fahad Alharbi, Mohammed Almuzian, David Bearn
Background: Miniscrews in orthodontics have been mainly used for anchorage without patient compliance in orthodontic treatment. The literature has reported changing failure rates. Objective: The aim of this review was to provide a precise estimation of miniscrew failure rate and the possible risk factors of the mechanically-retained miniscrews. Search method: Electronic search in database was undertaken up to July 2017 through the Cochrane Database of Systematic Reviews, MEDLINE, Scopus, and Ovid...
January 5, 2018: European Journal of Orthodontics
Mumen Z Rizk, Hisham Mohammed, Omar Ismael, David R Bearn
BACKGROUND: This review aims to compare the effectiveness of en masse and two-step retraction methods during orthodontic space closure regarding anchorage preservation and anterior segment retraction and to assess their effect on the duration of treatment and root resorption. METHODS: An electronic search for potentially eligible randomized controlled trials and prospective controlled trials was performed in five electronic databases up to July 2017. The process of study selection, data extraction, and quality assessment was performed by two reviewers independently...
January 5, 2018: Progress in Orthodontics
Nilüfer İrem Tunçer, Ayça Arman-Özçırpıcı, Bahar Füsun Oduncuoğlu, Alpdoğan Kantarcı
Piezoelectric surgery is a novel surgical approach used in orthodontic treatment for rapid tooth movement. This paper presents a case series wherein osseous outgrowths were observed in response to piezosurgery-assisted en-masse retraction. Sixteen patients requiring upper premolar extractions were treated with miniscrew-supported en-masse retraction and received minimally invasive decortication via piezosurgery. Computed tomography (CT) of the maxillary anterior region was performed to investigate the nature of the outgrowths...
January 2018: Korean Journal of Orthodontics
Shunsuke Uesugi, Satoshi Kokai, Zuisei Kanno, Takashi Ono
INTRODUCTION: Few studies have examined the secondary insertion of orthodontic miniscrews after failure of the first insertion. We investigated both the primary and secondary success rates of miniscrews used for maxillary anchorage and compared the stability of the maxillary buccal area (MB) and the midpalatal suture area (MP). METHODS: In total, 387 miniscrews were primarily inserted into the MB (between the second premolar and first molar); of these, 81 (20.9%) miniscrews lacked stability and were reinserted into the MB (same position or more distal position) or the MP...
January 2018: American Journal of Orthodontics and Dentofacial Orthopedics
Xiaoxue Wu, Haibo Liu, Chen Luo, Yonggang Li, Yin Ding
OBJECTIVE: To evaluate the effect of the maxillary dentition distalization with miniscrews implanted in the infrazygomatic (IZ) crest with 3D reconstruction module from cone-beam computed tomography (CBCT). METHODS: Twenty patients who previously underwent dentition distalization treatment with miniscrews were recruited. A total of 40 images were obtained using CBCT, taken immediately before placement of the miniscrew anchorage and at the end of distalization. The 3D-line measurements were recorded to monitor dental changes...
February 2018: Implant Dentistry
Avinash Kaur, Om P Kharbanda, Priyanka Kapoor, Dinesh Kalyanasundaram
BACKGROUND: The temporary anchorage devices (TADs) which include miniscrew implants (MSIs) have evolved as useful armamentarium in the management of severe malocclusions and assist in complex tooth movements. Although a multitude of factors is responsible for the primary and secondary stability of miniscrew implants, contemporary research highlights the importance of biological interface of MSI with bone and soft tissue in augmenting the success of implants. The inflammation and remodeling associated with MSI insertion or loading are reflected through biomarkers in peri-miniscrew implant crevicular fluid (PMICF) which is analogous to the gingival crevicular fluid...
November 27, 2017: Progress in Orthodontics
Michele Tepedino, Paolo M Cattaneo, Francesco Masedu, Claudio Chimenti
OBJECTIVE: To define a map of interradicular spaces where miniscrew can be likely placed at a level covered by attached gingiva, and to assess if a correlation between crowding and availability of space exists. METHODS: Panoramic radiographs and digital models of 40 patients were selected according to the inclusion criteria. Interradicular spaces were measured on panoramic radiographs, while tooth size-arch length discrepancy was assessed on digital models. Statistical analysis was performed to evaluate if interradicular spaces are influenced by the presence of crowding...
September 2017: Dental Press Journal of Orthodontics
S Jay Bowman
No abstract text is available yet for this article.
September 2017: Journal of Clinical Orthodontics: JCO
Hiroshi Tomonari, Hiroko Takada, Tomofumi Hamada, Sangho Kwon, Tsuyoshi Sugiura, Shouichi Miyawaki
BACKGROUND: We describe the case of a 16-year-old female patient with micrognathia, temporomandibular joint (TMJ) ankylosis, and obstructive sleep apnea, who was treated with mandibular distraction osteogenesis (DO) combined with sliding genioplasty, using skeletal anchorage. CASE PRESENTATION: We first performed interpositional arthroplasty, in which an interposition of fascia temporalis and surrounding fat tissue was inserted into the defect after bilateral condylectomy, increasing the maximum mouth opening from 5...
November 10, 2017: Head & Face Medicine
Lei Cheng, Yan Gu, Weibing Zhang, Chunyang Zhao
No abstract text is available yet for this article.
August 2017: Journal of Clinical Orthodontics: JCO
Vanessa Paredes-Gallardo, Verónica García-Sanz, Carlos Bellot-Arcís
This article describes the complex dental treatment of a 43-year-old man with skeletal Class II, mandibular asymmetry, severe brachyfacial pattern, Class II Division 2, canting of the occlusal plane, and an increased curve of Spee. To achieve optimal results, we adopted a multidisciplinary approach to treatment, involving periodontics, oral surgery, orthodontics, maxillofacial surgery, and prosthetics specialists. After periodontal treatment, miniscrews were placed to correct the occlusal plane canting and the excessive curve of Spee with orthodontic treatment...
November 2017: American Journal of Orthodontics and Dentofacial Orthopedics
Jae-Sik Hur, Hyoung-Ho Kim, Jin-Young Choi, Sang-Ho Suh, Seung-Hak Baek
OBJECTIVE: The objective of this study was to investigate the effects of miniscrew-assisted rapid palatal expansion (MARPE) on changes in airflow in the upper airway (UA) of an adult patient with obstructive sleep apnea syndrome (OSAS) using computational fluid-structure interaction analysis. METHODS: Three-dimensional UA models fabricated from cone beam computed tomography images obtained before (T0) and after (T1) MARPE in an adult patient with OSAS were used for computational fluid dynamics with fluid-structure interaction analysis...
November 2017: Korean Journal of Orthodontics
Insan Jang, Dong-Soon Choi, Jae-Kwan Lee, Wan-Tae Kim, Bong-Kuen Cha, Won-Youl Choi
Osseointegration was evaluated for the surface of miniscrews with TiO2 nanotube arrays containing drugs in this in-vivo study. The diameter and length of the TiO2 nanotube arrays were about 70 nm and 5 μm, respectively. Recombinant human bone morphogenetic protein-2 (rhBMP-2) or ibuprofen was loaded in the TiO2 nanotube arrays with 12 miniscrews. The 12 drug-loaded miniscrews, 6 miniscrews with no drug-loaded TiO2 nanotube arrays and 6 conventional miniscrews, were placed on the tibias of New Zealand white rabbits...
October 25, 2017: Biomedical Microdevices
Fabing Tan, Chao Wang, Chongshi Yang, Yuanding Huang, Yubo Fan
INTRODUCTION: Osseointegration is required for prosthetic implant, but the various bone-implant interfaces of orthodontic miniscrews would be a great interest for the orthodontist. There is no clear consensus regarding the minimum amount of bone-implant osseointegration required for a stable miniscrew. The objective of this study was to investigate the influence of different bone-implant interfaces on the miniscrew and its surrounding tissue. METHODS: Using finite element analysis, an advanced approach representing the bone-implant interface is adopted herein, and different degrees of bone-implant osseointegration were implemented in the FE models...
2017: Journal of Healthcare Engineering
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