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https://www.readbyqxmd.com/read/28229851/-skeletal-anchorage-in-the-past-today-and-tomorrow
#1
Birte Melsen, Michel Dalstra
INTRODUCTION: Skeletal anchorage was not introduced as an alternative to conventional anchorage modalities. The first skeletal anchorage was a ligature through a hole in the infrazygomatic crest. This was replaced by surgical screws and finally the TADs, which were optimized with respect to the material and morphology, were developed. A bracket-like head allows for the use of the mini-implant as indirect anchorage, but should not be a tool for lost control resulting from badly planned biomechanics or failing compliance...
March 2017: L' Orthodontie Française
https://www.readbyqxmd.com/read/28212452/bone-to-implant-contact-and-new-bone-formation-within-human-freeze-dried-bone-blocks-grafted-over-rabbit-calvaria
#2
Zvi Artzi, Karen Anavi-Lev, Avital Kozlovsky, Liat Chaushu, Frank Schwarz, Haim Tal
PURPOSE: To assess the extent of osseointegration with rough-surface implants and new bone formation (NBF) within human freeze-dried bone blocks (h-FDB) grafted over rabbit calvaria. MATERIALS AND METHODS: A total of 18 rectangular h-FDB blocks were stabilized bilaterally to the calvaria of nine New Zealand rabbits by two mini titanium screws each. A total of 18 rough-surface implants (5.0 × 6.0-mm) were placed, 9 simultaneously (immediate placement [IP]) on one side and 9 at 3 months after block grafting (delayed placement [DP]) on the contralateral side...
February 17, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28194343/the-effect-of-a-condylar-repositioning-plate-on-condylar-position-and-relapse-in-two-jaw-surgery
#3
Gyu Sik Jung, Taek Kyun Kim, Jeong Woo Lee, Jung Dug Yang, Ho Yun Chung, Byung Chae Cho, Kang Young Choi
BACKGROUND: Numerous condylar repositioning methods have been reported. However, most of them are 2-dimensional or are complex procedures that require a longer operation time and a highly trained surgeon. This study aims to introduce a new technique using a condylar repositioning plate and a centric relation splint to achieve a centric relationship. METHODS: We evaluated 387 patients who had undergone surgery for skeletal jaw deformities. During the operation, a centric relation splint, intermediate splint, final centric occlusion splint, and condylar repositioning plate along with an L-type mini-plate for LeFort I osteotomy or a bicortical screw for bilateral sagittal split ramus osteotomy were utilized for rigid fixation...
January 2017: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/28188487/management-and-radiographic-outcomes-of-femoral-head-fractures
#4
John A Scolaro, Geoffrey Marecek, Reza Firoozabadi, James C Krieg, Milton Lee Chip Routt
BACKGROUND: Femoral head fractures are uncommon injuries. Small series constitute the majority of the available literature. Surgical approach and fracture management is variable. The purpose of this study was to evaluate the incidence, method of treatment, and outcomes of consecutive femoral head fractures at a regional academic Level I trauma center. MATERIALS AND METHODS: A retrospective review of a prospective database was performed over a 13-year period. All AO/OTA 31C femoral head fractures were identified...
February 10, 2017: Journal of Orthopaedics and Traumatology: Official Journal of the Italian Society of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/28127376/safety-and-efficacy-of-mini-open-transforaminal-lumbar-interbody-fusion
#5
Mohamed M Mohi Eldin, Ehab M Eissa, Haitham M Elmorsy
OBJECTIVE: Mini-transforaminal lumbar interbody fusion (Mini-TLIF) and other minimally invasive approaches introduced for the purpose of treating lumbar degenerative disc disease and instability are achieving high success and safety rates as the conventional approaches. Moreover, it has less soft tissue damage, minimal blood loss, and less hospital stay. METHODS: A prospective study was conducted from 2012 to 2014 on 28 patients who were subjected to Mini-open TLIF combined with transpedicular screw fixation for spondylolisthesis and degenerative disc disease...
December 2016: Korean Journal of Spine
https://www.readbyqxmd.com/read/28124550/the-unfeasible-made-feasible-lumbar-minimally-invasive-hybrid-stabilization-with-dynamic-rod-and-mini-open-tlif
#6
Giuseppe M Barbagallo, Francesco Certo
BACKGROUND: Posterior dynamic stabilization of the lumbar spine is spreading as a viable alternative to spinal fusion, aiming to achieve an equally satisfactory clinical outcome without making the spine completely rigid. We describe the feasibility of a minimally invasive surgical technique used to implant a hybrid system and perform a mini-open (m-open) transforaminal lumbar interbody fusion (TLIF) in patients suffering from degenerative spondylolistesis and adjacent level's degenerative disc disease (DDD)...
January 26, 2017: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/28120055/restoration-of-thoracolumbar-spine-stability-and-alignment-in-elderly-patients-using-minimally-invasive-spine-surgery-miss-a-safe-and-feasible-option-in-degenerative-and-traumatic-spine-diseases
#7
Giuseppe M V Barbagallo, Giuseppe Raudino, Massimiliano Visocchi, A Abdulrazzaq Alobaid, A Abdulaziz Al-Mutair, Thomas Naveen, Francesco Certo
Minimally invasive spine surgery (MISS), including percutaneous pedicle-screw fixation (PPSF), mini-open transforaminal lumbar interbody fusion (m-open TLIF), vertebroplasty, and stentoplasty, allows the preservation of neurological function and the restoration of spine stability, while reducing associated risks and complications. This study aimed to analyze the safety and efficacy of MISS in elderly patients suffering from degenerative or traumatic thoracolumbar diseases. Forty-five patients (28 females), with a mean age of 73 years (range 65-89), suffering from osteoporotic vertebral fractures (24), degenerative spondylolisthesis (15), and lumbar canal stenosis with instability and/or de novo scoliosis (6) were included...
2017: Acta Neurochirurgica. Supplement
https://www.readbyqxmd.com/read/28107130/the-use-of-miniscrews-in-orthodontics-a-review-of-selected-clinical-applications
#8
Eliakim Mizrahi
This paper provides a brief review of the history and development of mini screws and presents its structural features, with particular reference to the screw sizes relevant to clinical orthodontics, site selection and the different placement techniques. It covers the clinical applications of miniscrews, incorporating the principle of direct and indirect anchorage as well as the use of intraoral auxiliaries for distal movement of molars. The role of palatal miniscrews for retraction of anterior teeth, and when used in combination with buccal miniscrews for intrusion of buccal teeth is also covered along with the possible causes of miniscrew failure...
November 1, 2016: Primary Dental Journal
https://www.readbyqxmd.com/read/28104440/twin-screw-extruded-lipid-implants-containing-trp2-peptide-for-tumour-therapy
#9
Marie-Paule Even, Sharan Bobbala, Blake Gibson, Sarah Hook, Gerhard Winter, Julia Engert
Much effort has been put in the development of specific anti-tumour immunotherapies over the last few years, and several studies report on the use of liposomal carriers for tumour-associated antigens. In this work, the use of lipid implants, prepared using two different extruders, was investigated for sustained delivery in tumour therapy. The implants consisted of cholesterol, soybean lecithin, Dynasan 114, trehalose, ovalbumin (OVA) or a TRP2 peptide, and Quil-A. Implants were first produced on a Haake Minilab extruder, and then a scale-down to minimal quantities of material on a small scale ZE mini extruder was performed...
January 16, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/27980339/no-confidence-that-success-rates-of-self-drilling-and-self-tapping-insertion-techniques-of-orthodontic-mini-implants-are-similar
#10
Reint Meursinge Reynders, Giorgio Cacciatore
Data sourcesMedline, Cochrane Central Register of Controlled Trials (CENTRAL), Embase, China National Knowledge Infrastructure (CNKI) and SIGLE.Study selectionRandomised controlled trials(RCTs), clinical controlled trials (CCTs) and cohort studies that assessed the success/failure rates of self-drilling and self-tapping mini-screws for orthodontic anchorage were considered.Data extraction and synthesisData was abstracted and assessed for quality by two reviewers independently. The Newcastle-Ottawa scale (NOS) was used to evaluate the methodological quality...
December 2016: Evidence-based Dentistry
https://www.readbyqxmd.com/read/27918313/a-comparison-of-the-mechanical-measures-used-for-assessing-orthodontic-mini-implant-stability
#11
Yara K Hosein, S Jeffrey Dixon, Amin S Rizkalla, Ali Tassi
PURPOSE: Mechanical loosening remains a common complication associated with mini-implant failure. The purpose of this study was to compare common mechanical measures of mini-implant stability to determine their association and reliability. MATERIALS AND METHODS: Ninety self-drilling orthodontic mini-implants from 6 manufacturers were inserted into artificial bone blocks. Insertion torques (ITs) and Periotest values (PVs) were measured. Subsequently, mini-implants underwent pull-out testing for measures of pull-out load (POL) and screw displacement (ScrD)...
December 1, 2016: Implant Dentistry
https://www.readbyqxmd.com/read/27916700/elucidation-and-visualization-of-solid-state-transformation-and-mixing-in-a-pharmaceutical-mini-hot-melt-extrusion-process-using-in-line-raman-spectroscopy
#12
Jeroen Van Renterghem, Ashish Kumar, Chris Vervaet, Jean Paul Remon, Ingmar Nopens, Yvan Vander Heyden, Thomas De Beer
Mixing of raw materials (drug+polymer) in the investigated mini pharma melt extruder is achieved by using co-rotating conical twin screws and an internal recirculation channel. In-line Raman spectroscopy was implemented in the barrels, allowing monitoring of the melt during processing. The aim of this study was twofold: to investigate (I) the influence of key process parameters (screw speed - barrel temperature) upon the product solid-state transformation during processing of a sustained release formulation in recirculation mode; (II) the influence of process parameters (screw speed - barrel temperature - recirculation time) upon mixing of a crystalline drug (tracer) in an amorphous polymer carrier by means of residence time distribution (RTD) measurements...
December 1, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27902591/a-novel-indication-for-a-method-in-the-treatment-of-lumbar-tuberculosis-through-minimally-invasive-extreme-lateral-interbody-fusion-xlif-in-combination-with-percutaneous-pedicle-screws-fixation-in-an-elderly-patient-a-case-report
#13
Qiyou Wang, Yichun Xu, Ruiqiang Chen, Jianwen Dong, Bin Liu, Limin Rong
RATIONALE: To describe a novel indication for a method through minimally invasive extreme lateral interbody fusion (XLIF) in combination with percutaneous pedicle screwsfixation in the treatment of lumbar tuberculosis (TB) in an elderly patient, and its clinical efficacy and feasibility. Lumbar TB is a destructive form of TB. Antituberculous treatment should be started as early as possible. In some circumstances, however, surgical debridement with or without stabilization of the spine appears to be beneficial and may be recommended...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27891469/comparison-of-anchorage-pattern-under-two-types-of-orthodontic-mini-implant-loading-during-retraction-in-type-a-anchorage-cases
#14
B Imran Khan, Gowri Sankar Singaraju, Prasad Mandava, G Vivek Reddy, Venkatesh Nettam, Venkat Naidu Bhavikati
INTRODUCTION: The orthodontic mini-screws are the mainstay of direct skeletal anchorage which requires minimal compliance and provides maximal anchorage control. However, the timing of initiation of orthodontic loading of these mini-screws is not clearly established in the available studies. AIM: The purpose of this study was to determine the reciprocal effects on mini-screw implant with immediate loading in comparison to that of delayed loading during retraction...
October 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27870692/wide-variation-of-surgical-cost-in-the-treatment-of-periarticular-lower-extremity-injuries-between-6-fellowship-trained-trauma-surgeons
#15
Robert J Wetzel, Laurence B Kempton, Edwin S Lee, Michael 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: Current Procedure Terminology codes for open treatment of bimalleolar ankle and bicondylar tibial plateau fractures identified patients...
December 2016: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/27776320/assessment-of-mechanical-behavior-of-pla-composites-reinforced-with-mg-micro-particles-through-depth-sensing-indentations-analysis
#16
S C Cifuentes, E Frutos, R Benavente, V Lorenzo, J L González-Carrasco
This work deals with the mechanical characterization by depth-sensing indentation (DSI) of PLLA and PLDA composites reinforced with micro-particles of Mg (up to 15wt%), which is a challenging task since the indented volume must provide information of the bulk composite, i.e. contain enough reinforcement particles. The composites were fabricated by combining hot extrusion and compression moulding. Physico-chemical characterization by TGA and DSC indicates that Mg anticipates the thermal degradation of the polymers but does not compromise their stability during processing...
January 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/27707564/a-systematic-review-and-meta-analysis-examining-the%C3%A2-differences-between-nonsurgical-management-and%C3%A2-percutaneous-fixation-of-minimally-and-nondisplaced-scaphoid-fractures
#17
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...
December 2016: Journal of Hand Surgery
https://www.readbyqxmd.com/read/27687637/hot-melt-extrusion-as-a-continuous-manufacturing-process-to-form-ternary-cyclodextrin-inclusion-complexes
#18
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...
January 1, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/27686641/-clinical-effect-of-compound-internal-fixations-in-treating-extreme-distal-radial-fractures
#19
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]
https://www.readbyqxmd.com/read/27686052/a-comparative-study-between-melt-granulation-compression-and-hot-melt-extrusion-injection-molding-for-the-manufacturing-of-oral-sustained-release-thermoplastic-polyurethane-matrices
#20
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...
November 20, 2016: International Journal of Pharmaceutics
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