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Mini screw

Hassan Alnaeem, Salah Aldekhayel, Johnathan Kanevsky, Omar Fouda Neel
PURPOSE: The optimal management of undisplaced scaphoid fractures remains controversial. A systematic review was conducted to assess the outcomes of acute, undisplaced scaphoid fractures managed with cast immobilization versus percutaneous or miniopen screw fixation in terms of time to return to work (RTW), time to union, and morbidity. METHODS: PubMed MEDLINE, Ovid MEDLINE, EMBASE, SCOPUS, and Cochrane electronic databases were searched over the period 1974 to 2015...
October 1, 2016: Journal of Hand Surgery
Justine Thiry, Fabrice Krier, Shenelka Ratwatte, Jean-Michel Thomassin, Christine Jerome, Brigitte Evrard
The aim of this study was to evaluate hot-melt extrusion (HME) as a continuous process to form cyclodextrin (CD) inclusion complexes in order to increase the solubility and dissolution rate of itraconazole (ITZ), a class II model drug molecule of the Biopharmaceutics Classification System. Different CD derivatives were tested in a 1:1 (CD:ITZ) molar ratio to obtain CD ternary inclusion complexes in the presence of a polymer, namely Soluplus(®) (SOL). The CD used in this series of experiments were β-cyclodextrin (βCD), hydroxypropyl-β-cyclodextrin (HPβCD) with degrees of substitution of 0...
September 26, 2016: European Journal of Pharmaceutical Sciences
J Fan, B Jiang, F Yuan, S Z Li, J Q Zhou, J Mei, L M Cheng, G R Yu
Objective: To investigate the clinical character and treating strategy of extreme distal radial fractures. Methods: From June 2012 to May 2014, 12 patients who suffered from extreme distal radial fractures were treated in Department of Orthopedics, Tongji Hospital, Tongji University. According to AO/OTA classification, there were 4 cases of type 23B1, 3 cases of 23B2, 3 cases of 23C1 and 2 cases of 23C3.When classified by morphological features, there were 4 of simple styloid process fracture, 3 of simple extreme distal radial fracture without articular surface involved, 3 of styloid process fracture combined with distal radial articular fracture, and 2 of articular surface splintered or collapse fracture...
October 1, 2016: Zhonghua Wai Ke za Zhi [Chinese Journal of Surgery]
G Verstraete, P Mertens, W Grymonpré, P J Van Bockstal, T De Beer, M N Boone, L Van Hoorebeke, J P Remon, C Vervaet
During this project 3 techniques (twin screw melt granulation/compression (TSMG), hot melt extrusion (HME) and injection molding (IM)) were evaluated for the manufacturing of thermoplastic polyurethane (TPU)-based oral sustained release matrices, containing a high dose of the highly soluble metformin hydrochloride. Whereas formulations with a drug load between 0 and 70% (w/w) could be processed via HME/(IM), the drug content of granules prepared via melt granulation could only be varied between 85 and 90% (w/w) as these formulations contained the proper concentration of binder (i...
September 26, 2016: International Journal of Pharmaceutics
Hua Chen, Huibo Li, Yuxiao Deng, Xin Rong, Quan Gong, Tao Li, Yueming Song, Hao Liu
PURPOSE: Lateral mass mini-screws used in plated cervical laminoplasty might penetrate into facet joints. The objective is to observe this complication incidence and to identify the optimal areas for 5- and 7-mm-long mini-screws to implant on lateral mass. METHODS: 47 patients who underwent plated cervical laminoplasty were included. The optimal area for mini-screws implanting was set according to pre-operative 3D CT reconstruction data. Then, each posterior-lateral mass surface was divided into three regions: 7-mm region, 5-mm region, and dangerous area...
September 26, 2016: European Spine Journal
Zohreh Hedayati, Mehrdad Shomali
BACKGROUND: Nowadays, mini screws are used in orthodontic tooth movement to obtain maximum or absolute anchorage. They have gained popularity among orthodontists for en masse retraction of anterior teeth after first premolar extraction in maximum anchorage cases. The purpose of this study was to determine the type of anterior tooth movement during the time when force was applied from different mini screw placements to the anterior power arm with various heights. METHODS: A finite element method was used for modeling maxillary teeth and bone structure...
December 2016: Progress in Orthodontics
Anna Gabriella Camacho Presotto, Cláudia Lopes Brilhante Bhering, Marcelo Ferraz Mesquita, Valentim Adelino Ricardo Barão
STATEMENT OF PROBLEM: Several studies have shown the superiority of computer-assisted design and computer-assisted manufacturing (CAD-CAM) technology compared with conventional casting. However, an advanced technology exists for casting procedures (the overcasting technique), which may serve as an acceptable and affordable alternative to CAD-CAM technology for fabricating 3-unit implant-supported fixed dental prostheses (FDPs). PURPOSE: The purpose of this in vitro study was to evaluate, using quantitative photoelastic analysis, the effect of the prosthetic framework fabrication method (CAD-CAM and overcasting) on the marginal fit and stress transmitted to implants...
September 22, 2016: Journal of Prosthetic Dentistry
M Sajjia, Ahmad B Albadarin, Gavin Walker
The aim of this study is to perform a statistical analysis on a pharmaceutical roller compaction process using an industrial-scale roller compactor "Freund TF-MINI model". The process was modelled using response surface methodology (RSM) to better understand and control the process in order to produce ribbons and granules with optimised quality. The significant process parameters were determined to be (i) the screw speed to roll speed ratio and (ii) the roll pressure. The roll speed was kept constant and the roll gap was uncontrolled...
September 17, 2016: International Journal of Pharmaceutics
Angélica Castro Pimentel, Marcello Roberto Manzi, Alex Juliano Prado Barbosa, Flávio Augusto Cotrim-Ferreira, Paulo Eduardo Guedes Carvalho, Gleison Fábio de Lima, Maria Cristina Zindel Deboni
PURPOSE: To evaluate the maximum strength and the maximum aperture supported by mini-implant screws of three different diameters in an in vitro rapid maxillary expander model. MATERIALS AND METHODS: Fifteen appliances were mounted in artificial bone polyurethane blocks. In each appliance, a Hyrax expander anchored by four mini-implant screw sets of three different diameters were divided into: group 1 (n = 5), 1.8-mm-diameter screws; group 2 (n = 5), 2.0-mm-diameter screws; and group 3 (n = 5), 2...
September 2016: International Journal of Oral & Maxillofacial Implants
Mohammad Umar Mumtaz, Fiaz Ahmad, Altaf Ahmad Kawoosa, Imtiyaz Hussain, Iftikhar Wani
INTRODUCTION: Rolando fractures being intra-articular fractures of the most mobile joint of the thumb, assume significance because any residual incongruity of the articular surface may result in loss of motion as well as secondary osteoarthritis and hence serious disability. This fracture continues to pose difficulties to the treating surgeons and although several treatment options have been described for these fractures, there are no definite guidelines. METHODS: The present study describes the results of open reduction and internal fixation of nine Rolando fractures with large and single fragments, using mini T-plate and screws...
August 2016: Journal of Hand and Microsurgery
Blandine Marion, Shahnaz Klouche, Julien Deranlot, Thomas Bauer, Geoffroy Nourissat, Philippe Hardy
PURPOSE: To compare postoperative pain during the first postoperative week and the position of the coracoid bone block at the anterior aspect of the glenoid after the arthroscopic and the mini-open Latarjet procedure. The secondary purpose was to assess functional results and recurrence after at least 2 years of follow-up. METHODS: This comparative prospective study included patients who underwent a Latarjet-Bristow procedure for anterior shoulder instability in 2012...
September 8, 2016: Arthroscopy: the Journal of Arthroscopic & related Surgery
Adam Hart, Edward J Harvey, Reza Rabiei, Francois Barthelat, Paul A Martineau
To promote a quicker return to function, an increasing number of patients are treated with headless screws for acute displaced and even non-displaced scaphoid fractures. Therefore, it is imperative to understand and optimize the biomechanical characteristics of different implants to support the demands of early mobilization. The objective of this study was to evaluate the biomechanical fixation strength of 4 headless compression screws under distracting and bending forces. The Acutrak Standard, Acutrak Mini, Synthes 3...
October 2016: Medical Engineering & Physics
Şükrü Oral, Abdulfettah Tümtürk, Ahmet Küçük, Ahmet Menkü
AIM The surgical approaches for spinal tumors, to a great extent, have been developed in accordance with the developments in technology. Today, many surgical techniques are implemented as anterior, anterolateral, posterior, posterolateral and combined approach. Due to its low morbidity, posterior approach is more preferred one. Laminectomy is a widely used technique especially in neoplastic lesions. However, following laminectomy, there are complications like instability, kyphotic deformity and scar formation...
October 22, 2015: Turkish Neurosurgery
Robert J Wetzel, Laurence B Kempton, Edwin S Lee, Michal Zlowodzki, Todd O McKinley, Walter W Virkus
OBJECTIVES: We hypothesized that negligible surgical material cost variation exists between traumatolgists for treatment of bimalleolar ankle and bicondylar tibial plateau fractures. DESIGN: Retrospective medical record review. SETTING: Academic Level 1 Trauma Center; 2-year period. PATIENTS/PARTICIPANTS: Common Procedure Terminology (CPT) codes for open treatment of bimalleolar ankle and bicondylar tibial plateau fractures identified patients...
August 23, 2016: Journal of Orthopaedic Trauma
B Li, G Wu, Y Yang
PURPOSE: To compare the outcome following conservative or surgical treatment for displaced fracture of the medial process of the calcaneal tuberosity. METHODS: 14 men and 4 women aged 20 to 44 years chose to undergo conservative (9 feet) or surgical (10 feet) treatment by a single surgeon for closed displaced fracture of the medial process of the calcaneal tuberosity. The injury mechanism was a fall from a height of <1.5 m; the mean time from injury to treatment was 3 (range, 1-7) days...
August 2016: Journal of Orthopaedic Surgery
Melike Oruç, Veysel Murat Işik, Yüksel Kankaya, Koray Gürsoy, Nezih Sungur, Gürcan Aslan, Uğur Koçer
Mandible fractures have a special place within the injuries of the other bones of the maxillofacial system. In their management, cosmetic issues and functional aspects such as chewing, speaking, and swallowing become very important.In this study, a retrospective analysis of 419 mandible fractures in 283 patients was performed in relation to epidemiologic factors, treatment strategies, and complications. The average age was 32.14 years (4-69 years). The male/female ratio was 4/1. The most frequent etiologic factor was interpersonal violence (104 patients, 36...
September 2016: Journal of Craniofacial Surgery
Nurhat Ozkalayci, Mehmet Yetmez
The aim of this study is to present a new upper molar distalization appliance called Cise distalizer designed as intraoral device supported with orthodontic mini screw for upper permanent molar distalization. The new appliance consists of eight main components. In order to understand the optimum force level, the appliance under static loading is tested by using strain gage measurement techniques. Results show that one of the open coils produces approximately 300 gr distalization force. Cise distalizer can provide totally 600 gr distalization force...
2016: Applied Bionics and Biomechanics
Feng Yu, Deng Feng, Zhang Yi, Zhu Yaling, Zhang Xiangfeng, Zhang He, Wang Huaqiao
OBJECTIVE: This study aims to identify the effects of corticotomy-assisted orthodontic premolar intrusion andevaluate the changes of root resorption and the alveolar bone. METHODS: Both sides of the mandible of eight male Beagle dogswere randomly assigned into experimental and control groups. The third (P3) and fourth (P4) premolars were intruded withboth mini-screw implant anchorage (MIA) and corticotomy on the experimental side. By contrast, P3 and P4 were intrudedwith MIA alone on the control side...
June 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
K Subramani, S N Pandruvada, D A Puleo, J K Hartsfield, S S Huja
BACKGROUND: The effects of surface roughness and carboxyl functionalization of multi-walled carbon nanotubes (MWCNTs) mixed with collagen coated onto titanium (Ti) substrates on MC3T3-E1 osteoblasts were evaluated. METHODS: The proliferation, differentiation, and matrix mineralization were investigated using (1) smooth-surfaced Ti discs, (2) Ti discs coated with collagen and MWCNT (Ti-MWCNT), and (3) Ti discs coated with collagen and MWCNT-COOH (Ti-MWCNT-COOH) for applications in orthodontic mini screw implants (MSIs)...
December 2016: Progress in Orthodontics
Rahul Vaidya, Fred Tonnos, Kerellos Nasr, Praveen Kanneganti, Gannon Curtis
OBJECTIVES: The purpose of this video is to describe the equipment, anatomy, and surgical technique of anterior subcutaneous pelvic fixation (INFIX) using pedicle screws and a rod in an Anterior Posterior Compression 3 pelvic fracture, as well as how to distract in lateral compression fractures. METHODS: The equipment required includes standard spine pedicle screw sets with long screws, 70-110 mm in length, and 7 or 8 mm in diameter. The approach is a mini open and one needs to be familiar with the iliac oblique, obturator outlet, and obturator inlet views...
August 2016: Journal of Orthopaedic Trauma
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