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https://www.readbyqxmd.com/read/29777391/shaping-ability-of-reciprocating-single-file-systems-in-severely-curved-canals-waveone-and-reciproc-versus-waveone-gold-and-reciproc-blue
#1
Sebastian Bürklein, Stefanie Flüch, Edgar Schäfer
The aim was to compare the canal straightening of M-wire [Reciproc (VDW, Munich, Germany) and WaveOne (Dentsply Maillefer, Ballaigues, Switzerland)] and gold- and blue-wire heat-treated [Reciproc blue (VDW) and WaveOne Gold (Dentsply Maillefer)] instruments in severely curved root canals. A total of 80 root canals in extracted human teeth with angles of curvatures ranging between 25° and 35° and radii ranging between 3.1 and 8.5 mm were divided into four groups (n = 20). Based on radiographs taken prior to instrumentation, the groups were balanced with respect to the angle and the radius of canal curvature (P = 1...
May 18, 2018: Odontology
https://www.readbyqxmd.com/read/29776819/corrective-osteotomy-for-hyperextended-elbow-with-limited-flexion-due-to-supracondylar-fracture-malunion
#2
Keiichiro Oura, Atsuo Shigi, Kunihiro Oka, Hiroyuki Tanaka, Tsuyoshi Murase
BACKGROUND: Extension deformity of the distal humerus after a malunited supracondylar fracture can restrict elbow flexion. Here we report a computer-assisted operative procedure and review the results of clinical cases in which corrective surgery was performed. METHODS: The medical records of the patients who underwent corrective osteotomy for hyperextended elbow malunion of the distal humerus with limited elbow flexion (flexion angle ≤100°) were reviewed retrospectively...
May 15, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29775976/-are-there-any-differences-in-quality-or-complication-rate-in-total-knee-arthroplasty-after-establishing-a-centre-for-endoprosthesis
#3
Muzaffer Düzgünoglu, Wolfgang Hönle, Alexander Scheller, Alexander Schuh
BACKGROUND: The aim of the study is to show whether there are any changes in quality or incidence of complications in total knee arthroplasty (TKA) after establishing a centre for endoprothesis (EPZ). MATERIAL AND METHODS: We conducted a retrospective study comparing 100 TKAs one year before establishing an EPZ (Group I) with 100 TKAs one year after establishing an EPZ (group II). Data were collected by analysing our electronic documentation system, and the report of the rehabilitation hospital...
May 18, 2018: Zeitschrift Für Orthopädie und Unfallchirurgie
https://www.readbyqxmd.com/read/29774402/subtrochanteric-and-diaphyseal-femoral-fractures-in-hypophosphatasia-not-atypical-at-all
#4
F Genest, L Seefried
Risk for subtrochanteric and diaphyseal femoral fractures is considered increased in patients with hypophosphatasia (HPP). Evaluating a large cohort of HPP patients, we could for the first time quantify the prevalcence and identify both morphometric features as well as predisposing factors for this complication of severe HPP. INTRODUCTION: Subtrochanteric and diaphyseal femoral fractures have been associated with both, long-term antiresorptive treatment and metabolic bone disorders, specifically Hypophosphatasia (HPP)...
May 17, 2018: Osteoporosis International
https://www.readbyqxmd.com/read/29773462/derotation-of-the-mallet-piece-a-crucial-point-in-mallet-fracture-surgery
#5
B Karslıoğlu, M Uzun, C Tetik, E Tasatan, A C Tekin, C D Buyukkurt
Mallet fracture is an avulsion of the extensor tendon and fracture of the dorsal rim of the articular surface of distal phalanx at the same time. If a part of the mallet fracture is angled or rotated to such a degree that prevents full anatomic reduction, malunion and deformities may occur as a result. The objective of this study was to describe a new surgical technique to provide derotation of the mallet fracture. A 22G or 21G needle is used like a joystick to reduce the mallet fracture with small, gentle movements...
May 14, 2018: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/29772860/-effect-observation-of-percutaneous-pedicle-screw-fixation-combined-with-percutaneous-vertebroplasty-for-the-treatment-of-osteoporotic-thoracolumbar-fractures
#6
Nan Wang, Jian-Zhu Xu, En-Liang Chen, Shi-Jie Zhao, Ren-Fu Quan
OBJECTIVE: To evaluate the clinical effects of percutaneous pedicle screw fixation(PPSF) combined with percutaneous vertebroplasty(PVP) for the treatment of osteoporotic thoracolumbar fractures. METHODS: The clinical data of 94 patients with osteoporotic thoracolumbar fractures treated from January 2014 to December 2015 were retrospectively analyzed. There were 31 males and 63 females, aged from 65 to 70 years old with an average of 67.2 years. Fracture level was T₁₁ on 15 cases, T₁₂ on 32 cases, L₁ on 29 cases and L₂ on 18 cases...
April 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29772857/-posterior-spinal-canal-decompression-with-screw-fixation-and-reconstruction-of-three-vertebral-column-for-thoracolumbar-burst-fractures-complicated-with-nerve-injury
#7
Li-Yong Wu, Xue-Mei Huang, Yue Wang, Zhao-Bo Yang, Sheng-Hui Su, Chun Wang
OBJECTIVE: To explore the feasibility and clinical effect of posterior spinal canal decompression with pedicle screw fixation and reconstruction of anterior and middle vertebral column for thoracolumbar burst fractures complicated with nerve injury. METHODS: A total of 36 patients with thoracolumbar burst fractures treated from March 2011 to April 2016 were enrolled in the retrospective study. There were 20 males and 16 females, aged from 21 to 52 years old with an average of 37...
April 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
https://www.readbyqxmd.com/read/29770583/angle-stable-interlocking-intramedullary-nails-for-tibial-plateau-fractures
#8
Peng Jia, Feng-Cheng Lu, Kifayat Ullah, Man Zhang, Yan-Sheng Dong, Chao Xiong, Zhi-Hui Zhao, Jin-Feng Wang, Ju-Wen Chen, Yong-Qing Wang
OBJECTIVE: Angle stable interlocking intramedullary nail (ASIN), a novel technique, has rarely been used for treatment of tibial plateau fractures (TPF). This retrospective study was designed to introduce this novel technique, ASIN, as well as to describe the initial experience and verify the effectiveness when ASIN was used for the management for TPF. METHODS: A cohort of 19 cases with closed TPF aged from 18-70 years with at least 23 months follow-up from November 2008 to September 2013 was analyzed retrospectively...
May 16, 2018: Orthopaedic Surgery
https://www.readbyqxmd.com/read/29769591/clinical-retrospective-case-control-study-on-the-mechanics-of-obstacle-in-mouth-opening-and-malocclusion-in-patients-with-maxillofacial-fractures
#9
Hai-Hua Zhou, Kun Lv, Rong-Tao Yang, Zhi Li, Xue-Wen Yang, Zu-Bing Li
This study aims to identify and distinguish various factors that may influence the clinical symptoms (limited mouth opening and malocclusion) in patients with maxillofacial fractures. From January 2000 to December 2009, 963 patients with maxillofacial fractures were enrolled in this statistical study to aid in evaluating the association between various risk factors and clinical symptoms. Patients with fractured posterior mandibles tended to experience serious limitation in mouth opening. Patients who sustained coronoid fractures have the highest risk of serious limitation in mouth opening (OR = 9...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29765904/cyclic-fatigue-resistance-torsional-resistance-and-metallurgical-characteristics-of-m3-rotary-and-m3-pro-gold-niti-files
#10
Eugenio Pedullà, Fabio Lo Savio, Giusy Rita Maria La Rosa, Gabriele Miccoli, Elena Bruno, Silvia Rapisarda, Seok Woo Chang, Ernesto Rapisarda, Guido La Rosa, Gianluca Gambarini, Luca Testarelli
Objectives: To evaluate the mechanical properties and metallurgical characteristics of the M3 Rotary and M3 Pro Gold files (United Dental). Materials and Methods: One hundred and sixty new M3 Rotary and M3 Pro Gold files (sizes 20/0.04 and 25/0.04) were used. Torque and angle of rotation at failure ( n = 20) were measured according to ISO 3630-1. Cyclic fatigue resistance was tested by measuring the number of cycles to failure in an artificial stainless steel canal (60° angle of curvature and a 5-mm radius)...
May 2018: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/29764298/the-distal-radius-palmar-cortical-angle-in-adolescent-versus-adult-populations
#11
Shane Breheny, Angela Christine Chang, April De Silva, Paul Allcock
PURPOSE: Volar distal radius plates are pre-contoured to aid restoration of anatomy during open reduction internal fixation of distal radius fractures. Incorrectly contoured plates can result in malreduction, leading to malunion, pain, and loss of function. The purpose of this study was to investigate whether adolescent distal radius anatomy on the palmar cortical surface differs from that in adults, in order to determine whether adult plates are suitable for use in adolescents. METHODS: Lateral wrist radiographs were used to measure the distal radius palmar cortical angle (PCA) in adolescent age groups (12-13, 14-15, and 16-17 years old) and compared to a skeletally mature control group (30-50 years old)...
May 2018: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/29763362/fracture-strength-and-precision-of-fit-of-implant-retained-monolithic-zirconia-crowns
#12
Pauliina Moilanen, Jenni Hjerppe, Lippo Lassila, Timo Närhi
OBJECTIVES: To examine fracture strength and precision of fit of screw-retained anterior monolithic zirconia crowns made directly on implants or by cementing on prefabricated titanium bases, and to compare these to industrially produced Procera crowns. . MATERIALS AND METHODS: Monolithic screw-retained implant crowns were produced by CAD/CAM method (Zirkonzahn, Italy) using either partially (PSZ, Prettau, Zirconzahn, Italy) or fully stabilized (FSZ, Prettau Anterior, Zirkonzahn) zirconia...
May 15, 2018: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29747611/an-in-vitro-study-evaluating-the-effect-of-ferrule-design-on-the-fracture-resistance-of-endodontically-treated-mandibular-premolars-after-simulated-crown-lengthening-or-forced-eruption-methods
#13
Qingfei Meng, Qian Ma, Tianda Wang, Yaming Chen
BACKGROUND: The purpose of this study was to evaluate the effect of ferrule design on the fracture resistance of endodontically treated mandibular first premolars after simulated crown lengthening and orthodontic forced eruption methods restored with a fiber post-and-core system. METHODS: Forty extracted and endodontically treated mandibular first premolars were decoronated to create lingual-to-buccal oblique residual root models, with a 2.0 mm height of the lingual dentine wall coronal to the cemento-enamel junction, and the height of buccal surface at the cemento-enamel junction...
May 10, 2018: BMC Oral Health
https://www.readbyqxmd.com/read/29746262/clinical-comparison-of-surgical-constructs-for-anterior-cervical-corpectomy-and-fusion-in-patients-with-cervical-spondylotic-myelopathy-or-ossified-posterior-longitudinal-ligament-a-systematic-review-and-meta-analysis
#14
Timothy R Niedzielak, Joseph Palmer, John P Malloy
STUDY DESIGN: This is a systematic review and meta-analysis. OBJECTIVE: To examine the differences in outcomes among current constructs and techniques for anterior cervical corpectomy and fusion (ACCF) in patients with single or multiple level cervical myelopathy (CM) secondary to cervical spondylosis or ossified posterior longitudinal ligament. SUMMARY OF BACKGROUND DATA: The natural history of CM can be a progressive disease process. In such cases, where surgical decompression is indicated to halt the progression, ACCF is typically chosen for pathology located posterior to the vertebral body...
May 9, 2018: Clinical Spine Surgery
https://www.readbyqxmd.com/read/29736726/high-incidence-of-intraoperative-calcar-fractures-with-the-cementless-cls-spotorno-stem
#15
Carla Timmer, Davey M J M Gerhardt, Enrico de Visser, Marinus de Kleuver, Job L C van Susante
INTRODUCTION: This study reports on the incidence of intraoperative calcar fractures with the cementless Spotorno (CLS) stem, and the potential role of a learning curve and implant positioning is investigated. METHODS: After introduction of the CLS stem, 800 consecutive cementless total hip arthroplasties (THA) were analyzed. The incidence of calcar fracture in the first 400 THA was compared with the second 400 THA, in order to study a potential learning curve effect...
May 7, 2018: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/29735375/which-additional-augmented-fixation-procedure-decreases-surgical-failure-after-proximal-humeral-fracture-with-medial-comminution-fibular-allograft-or-inferomedial-screws
#16
Doo-Sup Kim, Doo-Hyung Lee, Yong-Min Chun, Sang-Jin Shin
BACKGROUND: The purpose of this study was to compare clinical and radiologic results between treatment with locking plate fixation and fibular allograft augmentation (FA) and treatment with locking plate fixation and additional inferomedial screws (IMSs) in 3- or 4-part proximal humeral fractures with medial comminution in geriatric patients. METHODS: We enrolled 164 patients with 3- or 4-part proximal humeral fractures with medial comminution who were treated with locking plates...
May 4, 2018: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/29728330/validated-computational-framework-for-efficient-systematic-evaluation-of-osteoporotic-fracture-fixation-in-the-proximal-humerus
#17
Peter Varga, Jason A Inzana, Boyko Gueorguiev, Norbert P Südkamp, Markus Windolf
The high rate of fixation failure in osteoporotic proximal humerus fractures indicate the need for improved solutions. Computer simulations may help to overcome the limitations of the gold standard biomechanical testing in evaluating the performance of new implants and enhance the effectivity and outcome of the design process. This study presents a framework for automated computational analysis that facilitates efficient and systematic evaluation of proximal humerus fracture plating under a variety of conditions including bone quality, fracture pattern, implant configuration and loading regime...
May 1, 2018: Medical Engineering & Physics
https://www.readbyqxmd.com/read/29728172/hearing-loss-in-pediatric-temporal-bone-fractures-evaluating-two-radiographic-classification-systems-as-prognosticators
#18
A Bhindi, L Carpineta, B Al Qassabi, S Waissbluth, R Ywakim, J J Manoukian, L H P Nguyen
INTRODUCTION: Temporal bone fractures (TBF) are traditionally classified by their angle of fracture relative to the petrous ridge, and more recently by whether or not they violate the otic-capsule. This study compared rates of hearing loss (HL) and signs of otologic dysfunction among fracture types of both classification systems, within the pediatric population. METHODS: Pediatric patients were retrospectively characterized from a previously identified cohort of TBF patients, diagnosed from 2000 to 2014...
June 2018: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/29726795/complication-rates-for-preexisting-baclofen-pumps-and-ventricular-shunts-following-scoliosis-correction-a-preliminary-study
#19
Jonathan Dallas, Katherine D Sborov, Bradley S Guidry, Silky Chotai, Christopher M Bonfield
OBJECTIVE Many patients undergoing spinal fusion for neuromuscular scoliosis have preexisting neurosurgical implants, including ventricular shunts (VSs) for hydrocephalus and baclofen pumps (BPs) for spastic cerebral palsy. Recent studies have discussed a possible increase in implant complication rates following spinal fusion, but published data are inconclusive. The authors therefore, sought to investigate: 1) the rate of implant complications following fusion, 2) possible causes of these complications, and 3) factors that place patients at higher risk for implant-related complications...
May 4, 2018: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/29725849/the-impact-of-using-a-pneumatic-contra-angle-device-on-the-lifespan-of-m-wire-and-blue-treated-instruments
#20
Emmanuel João Nogueira Leal Silva, Victor Talarico Leal Vieira, Tanize Theresinha Gonçalves Gabina, Henrique Dos Santos Antunes, Hélio Pereira Lopes, Gustavo De-Deus
OBJECTIVES: To evaluate the cyclic fatigue resistance of Reciproc M-Wire R25 (VDW, Munich, Germany) and Reciproc R25 Blue instruments (VDW) driven by Direct® (VDW) contra-angle connected to an ordinary an air-driven motor or an electric motor and compare the results with those obtained by the Reciproc M-Wire R25 or Reciproc Blue R25 instruments driven by an electric torque-controlled motor using "RECIPROC ALL" preset program. MATERIALS AND METHODS: Thirty Reciproc M-Wire R25 (25/0...
May 3, 2018: Clinical Oral Investigations
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