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Hanan Nejer Al-Otaibi, Afnan F Al-Fouzan, Tamadher S Al-Mufleh, Nawaf Labban
BACKGROUND: The effect of different maintenance time of torque application and screw loosening in full-arch implant-supported prosthesis remains uninvestigated. PURPOSE: To examine the effect of different maintenance time of torque application on detorque values of implant abutment screw in full-arch implant-supported fixed complete denture. MATERIALS AND METHODS: Passively fitting framework supported by four implants stabilized on resin model torqued to 35 N-cm and maintained for different times; instant torque application (protocol A), 10 seconds (protocol B), and 30 seconds (protocol C) were used...
August 15, 2018: Clinical Implant Dentistry and related Research
Paulo Maló, Miguel de Araújo Nobre, Carlos Moura Guedes, Ricardo Almeida, António Silva, Nuno Sereno, João Legatheaux
BACKGROUND: More research is needed on the study of new materials for fixed prosthetic implant-supported rehabilitations. PURPOSE: The purpose of this study was to report the short-term outcome of full-arch implant-supported fixed hybrid polyetheretherketone (PEEK)-acrylic resin prostheses and the all-on-four concept. MATERIALS AND METHODS: This prospective cohort clinical study included 37 patients (29 women, eight men) with an average age of 60 years (range: 38-78 years) with 49 full-arch hybrid PEEK-acrylic resin prosthesis supported by implants through the all-on-four concept...
August 15, 2018: Clinical Implant Dentistry and related Research
Brian J Goodacre, Sarah E Goodacre, Charles J Goodacre
AIM: To present recent data regarding prosthetic complications with implant prostheses and crowns as well as compare this data with data presented in a 2003 publication. MATERIAL AND METHODS: An electronic Medline (PubMed) with MeSH terms search was performed, focussing on clinical studies that reported data on prosthetic complications associated with implant fixed complete dentures, implant overdentures, implant fixed partial dentures, and implant single crowns...
2018: European Journal of Oral Implantology
Mark E Steiner, David Wing, Kempland C Walley, Ohan Manoukian, Miguel Perez-Viloria, Stephen Okajima, Ara Nazarian
Background: In anatomic anterior cruciate ligament (ACL) reconstructions produced with flexible reamers and no knee hyperflexion, it is unknown whether knee hyperflexion is necessary for femoral interference screw insertion. Purpose: To compare femoral screw-graft divergence in anatomic ACL reconstructions with endoscopic interference screws placed without knee hyperflexion and with the use of flexible versus rigid screwdrivers. Study Design: Controlled laboratory study...
August 2018: Orthopaedic Journal of Sports Medicine
Phani Krishna Karthik Yelamarthy, Tarush Rustagi, Rajat Mahajan, Vishwajeet Singh, Kalidutta Das, Murari Lal Bansal, Bibhudendu Mohapatra, Harvinder Singh Chhabra
Background: Charcot spinal arthropathy (CSA), a destructive spinal pathology, is seen in patients with impaired sensation. Superimposed infection in the affected spinal segments can lead to a challenge in the diagnosis and management. Spinal cord injury (SCI) is the leading cause of CSA as persons with SCI have significantly impaired sensation. Though infection of the CSA is rare, SCI persons are prone to superimposed infection of the Charcot spine. We report atypical presentations of three cases of CSA with superimposed infection...
2018: Spinal Cord Series and Cases
Bhrugu Yagnik, Drashya Sharma, Harish Padh, Priti Desai
The non-invasive food grade Lactococcus lactis (L. lactis) represents a safe and attractive alternative to invasive pathogens for the delivery of plasmid DNA at mucosal sites. We have earlier shown the DNA delivery potential of r-L. lactis harboring DNA vaccine reporter plasmid; pPERDBY in vitro. In the present work, we examined in vivo delivery potential of food grade non-invasive r-L. lactis::pPERDBY (LacVax® DNA-I) in BALB/c mice. Moreover, using EGFP as a model antigen, we also characterized and compared the immune response elicited by LacVax® DNA-I with other conventional vaccination approaches using protein and naked DNA immunization...
August 14, 2018: Gene Therapy
Muhammad Ali Fazal, Jason Hol-Ming Wong, Luthfur Rahman
OBJECTIVE: First MTP joint fusion is a reliable procedure for advanced arthritis for the first MTP joint. There are many techniques described. The purpose of our study is to report clinical, radiological, functional outcomes and complications of first metatarsophalangeal joint fusion with hand preparation of the joint and fixation with two orthogonal locking plates without a compression screw. METHODS: 32 feet in 26 consecutive patients under went first metatarsophalangeal joint fusion with above technique...
August 11, 2018: Acta Orthopaedica et Traumatologica Turcica
Simone E Dekker, Chad A Glenn, Thomas A Ostergard, Brian D Rothstein, Nicholas C Bambakidis
This operative video illustrates resection of a cervical ependymoma in a 40-yr-old female with numbness of upper and lower extremities and ataxia. Magnetic resonance imaging (MRI) demonstrated an enhancing intramedullary intradural spinal mass at C2-3. The patient underwent a posterior cervical laminoplasty for tumor resection. This video highlights the natural history of this disease, treatment options, surgical procedure, potential risks and complications, and postoperative management of ependymomas. A posterior midline skin incision was made from the inion to the level of C4 which exposed the posterolateral elements of C1-3...
August 13, 2018: Operative Neurosurgery (Hagerstown, Md.)
Simone E Dekker, Thomas A Ostergard, Chad A Glenn, Efrem Cox, Nicholas C Bambakidis
This operative video demonstrates a posterior cervical laminoplasty for the resection of a cervical intradural extramedullary meningioma. In addition, the natural history, treatment options, and potential complications are discussed. The patient is a 68-yr-old male who presented with left-hand grip weakness and paresthesias. Magnetic resonance imaging (MRI) demonstrated an enhancing mass that displacing the spinal cord anteriorly and causing severe flattening of the cord at C4 and C5. The patient underwent a posterior cervical laminoplasty for tumor resection...
August 11, 2018: Operative Neurosurgery (Hagerstown, Md.)
Uygur Esat, Oguz Poyanli, Mutlu Brahim, Çelk Talip, Akpinar Fuat
BACKGROUND: This study compared the biomechanical properties of three different fixation methods of tension band wirings, used in the treatment of medial malleolus fractures. The first method used an innovative "handmade bent pin" for cerclage fixation. The second method used a U-shaped K-wire to attach the cerclage to the medial tibial cortex. These two novel fixation techniques were compared with the traditional tension band wiring technique which is fixated to the bone by a screw...
August 11, 2018: Orthopaedics & Traumatology, Surgery & Research: OTSR
Hua-Wei Wang, Yi-Heng Yin, Ya-Zhou Jin, Rui Zong, Teng Li, Guang-Yu Qiao, Xin-Guang Yu
OBJECTIVE: Unfamiliarity with the morphometry of assimilated C1 lateral mass(C1LM) could make screw placement dangerous. In the study, we define the morphometric dimensions of occipitalized C1LM so as to provide surgeons with valuable information for preoperative planning. METHODS: Thin-slice computed tomography scanning data of 131 OA patients and 50 control cases were imported into MIMICS software for analysis. The widths and heights of C1LM were fully measured in different planes...
August 11, 2018: World Neurosurgery
Nicholas Pulos, Kathleen M Kollitz, Allen T Bishop, Alexander Y Shin
BACKGROUND: Outcomes following revision surgery for scaphoid nonunions with osteonecrosis are guarded. We hypothesized that use of free vascularized medial femoral condyle (MFC) bone grafts can lead to healing of the nonunion, increase vascularity of the proximal pole, and restore scaphoid architecture, resulting in acceptable functional outcomes. METHODS: We performed a retrospective review of 49 patients who were treated with an MFC bone graft, between May 2005 and September 2016, after prior failure of operative treatment for scaphoid nonunion...
August 15, 2018: Journal of Bone and Joint Surgery. American Volume
A Ceja-Espinosa, R Huato-Reyes, R Ortega-Valencia
Background: Hangman's fractures of the C2 verebrae represent approximately 20% of all cervical fractures. They are challenging cases and there is still no consensus regarding the optimal surgical vs nonoperative treatment. Case Description: A 40-year-old female presented with a C2 bilateral pars articularis fracture. She exhibited a partial spastic quadriparesis. Computed tomography and magnetic resonance imaging showed a C2 "hangman's" fracture with compromise of the C2-3 intervertebral disk...
2018: Surgical Neurology International
Bryan G Beutel, Omri Ayalon, Oran D Kennedy, Matin Lendhey, John T Capo, Eitan Melamed
Background: Intramedullary headless screw (IMHS) has shown promise as an alternative to other fixation devices for metacarpal neck fractures. The purpose of this study was to assess the biomechanical performance of IMHS versus the commonly-used crossed K-wire technique. We hypothesized that IMHS fixation provides superior stability to K-wires. Methods: A metacarpal neck fracture model in 23 human cadaveric metacarpals was created. The specimens were divided into two groups based upon fixation method: Group 1, 3 mm intramedullary headless screw; and Group 2, 0...
2018: Iowa Orthopaedic Journal
Michael Willey, Matthew L Welsh, Travis S Roth, Kenneth J Koval, James V Nepola
Recent estimates suggest an annual incidence of greater than 125,000 femoral neck fractures. Surgical treatment is indicated for the majority of these fractures, which are estimated to double by the year 2050. Most displaced femoral neck fractures in elderly patients are treated with arthroplasty secondary to high complication rates associated with internal fixation. Traditional implants used for internal fixation, typically in elderly patients with stable fracture morphology and younger patients regardless of morphology, include the sliding hip screw (SHS), with or without a supplemental anti-rotation screw, and multiple cancellous lag screws...
2018: Iowa Orthopaedic Journal
Jill G Putnam, Ryan M DiGiovanni, Sean M Mitchell, Paulo Castañeda, Scott G Edwards
PURPOSE: Currently, there is no consensus on the optimal treatment for scaphoid nonunion with avascular necrosis (AVN). Various techniques, often involving vascularized corticocancellous bone grafting, have been proposed. The authors hypothesized that similar outcomes might be possible with volar plate fixation augmented with autogenous pure cancellous graft. METHODS: The authors performed a retrospective chart review of 13 cases of scaphoid nonunions with AVN in 12 patients treated with plate fixation and pure cancellous bone grafting...
August 10, 2018: Journal of Hand Surgery
Zhiqiang Wang, Yi Yin, Qingshan Li, Guanjun Sun, Xu Peng, Hua Yin, Yongjie Ye
BACKGROUND: The incidence of early postoperative complications of displaced intracapsular hip fractures is high. The purpose of this study was to compare the early postoperative complications and assess the incidence of femoral neck shortening on using a newly designed proximal femoral cannulated screw locking plate (CSLP) versus multiple cancellous screws (MCS) in the treatment of displaced intracapsular hip fractures in young adults. METHODS: Sixty-eight young adult patients with displaced intracapsular hip fractures were randomly assigned to either the CSLP group or the MCS group and treated routinely by internal fixation with either the CSLP or the MCS...
August 13, 2018: Journal of Orthopaedic Surgery and Research
Toshiaki Takahashi, Manabu Takahashi, Haruyasu Yamamoto, Hiromasa Miura
PURPOSE: There has been no report to date on any biomechanical study regarding the strength of fixation at the osteotomy site in dome-shaped high tibial osteotomy (HTO). In this study, we evaluated the biomechanical strength of a spacer that we improved and determined the medial site of HTO. METHODS: HTO correction angles of 15° and 20° were used in all experiments, which were performed on lower leg specimens from pigs ( n = 12). The osteotomy site was fixed by a locking plate and screws with a spacer...
May 2018: Journal of Orthopaedic Surgery
Lei Han, Ren-Fu Quan, Yun-Gen Hu, Wei-Li Fang, Bo Jin, Shi-Chao Xu
Thoracolumbar fractures are common and severe traumas. Anterior approaches can achieve adirect spinal cord decompression and reconstruct anterior column height what load bearing the major load distribution of the spine. Therefore, anterior approach is an important method in the treatment of thoracolumbar fractures. With the application of pedicle screw, most of the patients were treated with posterior approaches.Because of the unique advantages of anterior approach, the posterior approach can not be replaced it...
July 25, 2018: Zhongguo Gu Shang, China Journal of Orthopaedics and Traumatology
Koji Ishikawa, Tomoaki Toyone, Toshiyuki Shirahata, Yoshifumi Kudo, Akira Matsuoka, Hiroshi Maruyama, Chikara Hayakawa, Soji Tani, Masaya Sekimizu, Koki Tsuchiya, Takeshi Eguro, Yusuke Oshita, Tomoyuki Ozawa, Yusuke Nakao, Shigeo Sano, Takashi Nagai, Koji Kanzaki, Katsunori Inagaki
STUDY DESIGN: Prospective feasibility study on consecutive patients. OBJECTIVE: The aim of this study was to investigate the ability of regional BMD around the pedicle screw to predict the screw fixation. SUMMARY OF BACKGROUND DATA: Pedicle screw fixation is the gold standard technique for spinal fusion. Despite the advantage of biomechanical stability, screw loosening is a common complication. In previous studies, pullout strength and screw insertional torque were correlated, and most importantly, affected by bone mineral density (BMD)...
August 10, 2018: Clinical Spine Surgery
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