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Implant restoration

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https://www.readbyqxmd.com/read/29443845/raising-the-joint-line-in-tka-is-associated-with-mid-flexion-laxity-a-study-in-cadaver-knees
#1
Thomas Luyckx, Hilde Vandenneucker, Lennart Scheys Ing, Evie Vereecke, Arnout Victor Ing, Jan Victor
BACKGROUND: In a typical osteoarthritic knee with varus deformity, distal femoral resection based off the worn medial femoral condyle may result in an elevated joint line. In a setting of fixed flexion contracture, the surgeon may choose to resect additional distal femur to obtain extension, thus purposefully raising the joint line. However, the biomechanical effect of raising the joint line is not well recognized. QUESTIONS/PURPOSES: (1) What is the effect of the level of the medial joint line (restored versus raised) on coronal plane stability of a TKA? (2) Does coronal alignment technique (mechanical axis versus kinematic technique) affect coronal plane stability of the knee? (3) Can the effect of medial joint-line elevation on coronal plane laxity be predicted by an analytical model? METHODS: A TKA prosthesis was implanted in 10 fresh frozen nonarthritic cadaveric knees with restoration of the medial joint line at its original level (TKA0)...
March 2018: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/29442096/oral-and-masticatory-rehabilitation-using-osseointegrated-dental-implants-after-resective-treatment-of-multicystic-ameloblastoma-in-the-lower-jaw-with-a-fibula-graft
#2
João Ricardo Almeida Grossi, Tatiana Miranda Deliberador, Tielly Saad, Rafaela Scariot, Joao Cesar Zielak, Allan Fernando Giovanini
Ameloblastoma is an aggressive odontogenic tumor which typically occurs between third and fourth decade of life that often needs resective approach. Immediate reconstruction may show better results. The treatment of multicystic ameloblastoma in the mandible being a rare case that occurred in the late second decade of life, which was surgically removed along with the affected teeth with safety margins, and the region was immediately reconstructed using a vascularized graft, removed from the fibula. Its integration, in combination with osseointegrated dental implants and fixed implant-supported prostheses, restored chewing function and esthetics...
January 2018: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/29441709/multifunctional-cell-instructive-silk-bioactive-glass-composite-reinforced-scaffolds-toward-osteoinductive-proangiogenic-and-resorbable-bone-grafts
#3
Joseph Christakiran Moses, Samit Kumar Nandi, Biman B Mandal
The successful regeneration of large volume bone defects necessitates the use of proangiogenic and resorbable scaffolding matrix. Impaired and slow ingrowth of host vasculature within implanted grafts greatly compromises its effective osseointegration. By addressing this, it is demonstrated that the use of copper doped bioactive glass functionalizes silk microfiber reinforcements to improve the physicochemical and osteoinductive properties of two silk scaffolding matrices (mulberry Bombyx mori and non-mulberry Antheraea assama) employed in the study...
February 14, 2018: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/29435517/a-detailed-decision-tree-to-create-preserve-transfer-and-support-the-emergence-profile-in-anterior-maxillary-implants-using-custom-abutments
#4
Eleftherios Grizas, Stefanos Kourtis, Efstathia Andrikopoulou, Georgios E Romanos
Rehabilitation with implants in the esthetic zone is one of the most demanding tasks due to the importance of obtaining an optimum esthetic result. The aim of this article was to present a workflow to create, preserve, transfer and support the emergence profile in anterior maxillary implants. Different methods are used surgically as well as prosthetically to construct an ideal restoration. When immediate loading can be applied in cases of increased primary stability, a provisional restoration is placed with occlusal contacts...
February 12, 2018: Quintessence International
https://www.readbyqxmd.com/read/29433563/therapeutic-effect-of-human-umbilical-cord-derived-mesenchymal-stem-cells-on-injured-rat-endometrium-during-its-chronic-phase
#5
Lu Zhang, Ying Li, Chun-Yi Guan, Shi Tian, Xiao-Dan Lv, Jian-Hui Li, Xu Ma, Hong-Fei Xia
BACKGROUND: Repair deficiency after endometrial injury is an important reason for intra-uterine adhesions, amenorrhea, and infertility in females. Bone marrow-derived mesenchymal stem cell (BMSC) transplantation is effective in repairing the damaged endometrium. However, the possibility of using umbilical cord-derived MSCs (UC-MSCs) to treat endometrial injury is rarely reported. METHODS: Ethanol (95%) was injected into rat uterus to establish a model of endometrial injury...
February 13, 2018: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29432411/electrical-receptive-fields-of-retinal-ganglion-cells-influence-of-presynaptic-neurons
#6
Matias I Maturana, Nicholas V Apollo, David J Garrett, Tatiana Kameneva, Shaun L Cloherty, David B Grayden, Anthony N Burkitt, Michael R Ibbotson, Hamish Meffin
Implantable retinal stimulators activate surviving neurons to restore a sense of vision in people who have lost their photoreceptors through degenerative diseases. Complex spatial and temporal interactions occur in the retina during multi-electrode stimulation. Due to these complexities, most existing implants activate only a few electrodes at a time, limiting the repertoire of available stimulation patterns. Measuring the spatiotemporal interactions between electrodes and retinal cells, and incorporating them into a model may lead to improved stimulation algorithms that exploit the interactions...
February 12, 2018: PLoS Computational Biology
https://www.readbyqxmd.com/read/29432117/closed-loop-continuous-hand-control-via-chronic-recording-of-regenerative-peripheral-nerve-interfaces
#7
Philip P Vu, Zachary T Irwin, Autumn J Bullard, Shoshana W Ambani, Ian C Sando, Melanie G Urbanchek, Paul S Cederna, Cynthia A Chestek
Loss of the upper limb imposes a devastating interruption to everyday life. Full restoration of natural arm control requires the ability to simultaneously control multiple degrees of freedom of the prosthetic arm and maintain that control over an extended period of time. Current clinically available myoelectric prostheses do not provide simultaneous control or consistency for transradial amputees. To address this issue, we have implemented a standard Kalman filter for continuous hand control using intramuscular electromyography (EMG) from both regenerative peripheral nerve interfaces (RPNI) and an intact muscle within non-human primates...
February 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29428340/long-term-outcomes-of-craniofacial-implants-for-the-restoration-of-facial-defects
#8
S S Subramaniam, O Breik, B Cadd, G Peart, D Wiesenfeld, A Heggie, S D Gibbons, A Nastri
The aim of this study was to evaluate the long-term survival of craniofacial implants and prostheses and to identify factors associated with failure in a cohort of patients. A 25-year retrospective analysis was conducted at Royal Melbourne Hospital. Data included demographic characteristics, age, site and cause of the deformity, and number and survival of implants. Odds ratios were calculated and event-to-time Kaplan-Meier analyses performed. One hundred and ten patients were included (341 implants); their mean age was 46...
February 7, 2018: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/29426448/the-toronto-experience-with-the-argus-ii-retinal-prosthesis-new-technology-new-hope-for-patients
#9
Robert G Devenyi, Joshua Manusow, Beatrice E Patino, Mohamed Mongy, Michelle Markowitz, Samuel N Markowitz
Surgical restoration of vision with retinal prostheses is a new and developing technology currently available in a select group of countries, Canada among them. The Argus II retinal prosthesis is the first commercially available device for restoration of vision in patients with Retinitis Pigmentosa or with similar retinal pathology who still have minimal residual native vision. The surgery is complex and requires training however it is within the abilities of any experienced retina surgeon. Surgical experience builds up with each case and in our patients length of surgery constantly went down...
February 2018: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/29426432/rehabilitation-of-lost-functional-vision-with-the-argus-ii-retinal-prosthesis
#10
Michelle Markowitz, Mark Rankin, Mohamed Mongy, Beatrice E Patino, Joshua Manusow, Robert G Devenyi, Samuel N Markowitz
The Argus II retinal prosthesis is the first commercially available device for restoration of vision in patients with Retinitis Pigmentosa or with similar retinal pathology who still have minimal residual native vision. The technology is able to restore vision with production of artificial visual percepts which usually are given adequate useful interpretation by the visual system in most implanted patients. The technology usually produces visual perception at the level of shape identification or better in some cases enabling in many less dependence on vision substitution devices and skills...
February 2018: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/29426281/primary-percutaneous-coronary-intervention-during-st-elevation-myocardial-infarction-in-prosthetic-valve-endocarditis-a-case-report
#11
Alfonso Campanile, Guido Tavazzi, Francesco Caprioglio, Fausto Rigo
BACKGROUND: Infective endocarditis (IE) is still a condition with high mortality and morbidity, especially in the elderly, and in patients with prosthetic valves. The concept of "time-to-therapy" plays a key role for the prompt management of IE and related complications, and the currently available multimodality imaging may play a key role in this setting. Myocardial ischemia due to extrinsic coronary compression from an aortic abscess is an extremely rare condition where the optimal therapeutic strategy has not been defined yet...
February 9, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29425385/analysis-of-accommodative-performance-of-a-new-accommodative-intraocular-lens
#12
Jorge L Alió, Aleksey N Simonov, Daniel Romero, Alexander Angelov, Yavor Angelov, Willem van Lawick, Michiel C Rombach
PURPOSE: To compare objective and subjective accommodation and visual acuities with a new accommodative intraocular lens (IOL) (Lumina; AkkoLens Clinical BV, Rijswijk, The Netherlands) with a monofocal IOL and young phakic eyes. METHODS: In this prospective, randomized controlled clinical investigation, patients aged 51 to 85 years with symptomatic cataract were enrolled in the study. A total of 25 eyes were implanted with the accommodative IOL and 18 eyes received the monofocal Acrysof SA60AT IOL (Alcon Laboratories, Inc...
February 1, 2018: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/29424766/social-connectedness-and-perceived-listening-effort-in-adult-cochlear-implant-users-a-grounded-theory-to-establish-content-validity-for-a-new-patient-reported-outcome-measure
#13
Sarah E Hughes, Hayley A Hutchings, Frances L Rapport, Catherine M McMahon, Isabelle Boisvert
OBJECTIVES: Individuals with hearing loss often report a need for increased effort when listening, particularly in challenging acoustic environments. Despite audiologists' recognition of the impact of listening effort on individuals' quality of life, there are currently no standardized clinical measures of listening effort, including patient-reported outcome measures (PROMs). To generate items and content for a new PROM, this qualitative study explored the perceptions, understanding, and experiences of listening effort in adults with severe-profound sensorineural hearing loss before and after cochlear implantation...
February 8, 2018: Ear and Hearing
https://www.readbyqxmd.com/read/29423969/a-clinical-comparative-study-of-3-dimensional-accuracy-between-digital-and-conventional-implant-impression-techniques
#14
Mohammed Hussein M Alsharbaty, Marzieh Alikhasi, Simindokht Zarrati, Ahmed Reza Shamshiri
PURPOSE: To evaluate the accuracy of a digital implant impression technique using a TRIOS 3Shape intraoral scanner (IOS) compared to conventional implant impression techniques (pick-up and transfer) in clinical situations. MATERIALS AND METHODS: Thirty-six patients who had two implants (Implantium, internal connection) ranging in diameter between 3.8 and 4.8 mm in posterior regions participated in this study after signing a consent form. Thirty-six reference models (RM) were fabricated by attaching two impression copings intraorally, splinted with autopolymerizing acrylic resin, verified by sectioning through the middle of the index, and rejoined again with freshly mixed autopolymerizing acrylic resin pattern (Pattern Resin) with the brush bead method...
February 9, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29423280/biomaterials-enabled-cornea-regeneration-in-patients-at-high-risk-for-rejection-of-donor-tissue-transplantation
#15
M Mirazul Islam, Oleksiy Buznyk, Jagadesh C Reddy, Nataliya Pasyechnikova, Emilio I Alarcon, Sally Hayes, Philip Lewis, Per Fagerholm, Chaoliang He, Stanislav Iakymenko, Wenguang Liu, Keith M Meek, Virender S Sangwan, May Griffith
The severe worldwide shortage of donor organs, and severe pathologies placing patients at high risk for rejecting conventional cornea transplantation, have left many corneal blind patients untreated. Following successful pre-clinical evaluation in mini-pigs, we tested a biomaterials-enabled pro-regeneration strategy to restore corneal integrity in an open-label observational study of six patients. Cell-free corneal implants comprising recombinant human collagen and phosphorylcholine were grafted by anterior lamellar keratoplasty into corneas of unilaterally blind patients diagnosed at high-risk for rejecting donor allografts...
2018: NPJ Regenerative Medicine
https://www.readbyqxmd.com/read/29420385/orthognathic-surgery-and-implant-supported-bridge-in-a-class-iii-patient-injured-in-a-motor-vehicle-accident
#16
Koji Honda, Makoto Hirota, Toshinori Iwai, Koichi Fujita, Susumu Omura, Takashi Ono, Iwai Tohnai
Occlusal and esthetic rehabilitation of jaw deformities in patients with partially edentulous maxilla are challenging procedures. This article describes a patient involving a skeletal Class III, 36-year-old male patient with a single bilateral anterior partially edentulous maxilla resulting from injuries sustained in a motor vehicle accident; his anterior teeth had been lost for more than 10 years. His lip protruded from the lateral view due to the proclined upper incisors and mandibular protrusion.Because of the facial deformity and inadequate prosthesis of the maxilla, the prosthesis had dropped out repeatedly...
February 7, 2018: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/29417647/fracture-resistance-of-titanium-based-lithium-disilicate-and-zirconia-implant-restorations
#17
Evan E Roberts, Clifton W Bailey, Deborah L Ashcraft-Olmscheid, Kraig S Vandewalle
PURPOSE: To evaluate the fracture resistance of a newer lithium disilicate abutment material. MATERIALS AND METHODS: A premolar-shaped implant crown was designed using CAD/CAM software, and four groups of implant and crown combinations were milled: (1) lithium-disilicate hybrid-abutment crown; (2) "screwmentable" lithium-disilicate hybrid abutment/lithium-disilicate crown with screw channel; (3) lithium-disilicate hybrid abutment/lithium-disilicate crown; and (4) zirconia hybrid abutment/lithium-disilicate crown (control)...
February 8, 2018: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29414502/intraorbital-hemorrhage-following-a-secondary-intervention-at-integrated-zygomatic-implants-a-case-report
#18
Philippe Van Camp, Luc Vrielinck, Bert Gemels, Constantinus Politis
INTRODUCTION: Zygomatic implant placement can be the best option for restoring masticatory function of an extremely atrophic upper jaw, but the procedure is more invasive than conventional implant placement and can be associated with complications. PRESENTATION OF CASE: We report a complication that occurred during a secondary corrective surgical procedure four years after zygomatic implant placement. The patient was a 54-year-old female who had been edentulous for 25 years...
January 29, 2018: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/29410240/the-use-of-omics-profiling-to-improve-outcomes-of-bone-regeneration-and-osseointegration-how-far-are-we-from-personalized-medicine-in-dentistry
#19
E Calciolari, N Donos
Increased life expectancy and broader restorative dental treatment alternatives for missing teeth have resulted in an increasing request of bone regeneration/augmentation procedures not only in healthy patients, but also in elderly and medically compromised ones. This is also combined with a growing demand for short implant loading protocols and for optimal aesthetic results. In order to meet these new dental needs, personalized treatment strategies tailored on each individual's characteristics and healing profile are warranted...
February 1, 2018: Journal of Proteomics
https://www.readbyqxmd.com/read/29409292/structural-interaction-between-bone-and-implants-due-to-arthroplasty-of-the-first-metatarsophalangeal-joint
#20
Marco A Martínez Bocanegra, Javier Bayod Lopez, A Vidal-Lesso, Ricardo Becerro de Bengoa Vallejo, Raúl Lesso-Arroyo
BACKGROUND: Currently, the metatarsophalangeal joint replacement through a restorative arthroplasty, where implants are used, is a viable invasive surgical medical procedure in the treatment of severe cases of osteoarthritis in this joint, better known as hallux rigidus. However, few things are known about the postoperative complications that implants can cause on the joint, like Swanson and Tornier implants.Research in this field can provide a valuable information that would help the specialist surgeon in the decision-making during the selection of the more suitable joint implant in each patient, as well as the redesign of the devices, to make them more efficient, durable and biocompatible with the human body...
October 20, 2017: Foot and Ankle Surgery: Official Journal of the European Society of Foot and Ankle Surgeons
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