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Soft tissue AND implant AND bone

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https://www.readbyqxmd.com/read/28930925/conical-modification-of-forearm-free-flaps-for-single-stage-reconstruction-after-total-orbital-exenteration
#1
Chad A Purnell, Elbert E Vaca, Marco F Ellis
BACKGROUND: Orbital exenteration is a significant reconstructive challenge for plastic surgeons. Options described for these defects range from healing by secondary intention to free tissue transfer. The authors present our preferred reconstruction of orbital defects with free forearm-based flaps, which provides quality soft tissue and orbital contouring in 1 stage to consistently allow placement of bone-anchored implants for eventual orbital prosthesis. METHODS: This conical shape of the orbit is deconstructed into a "Pac-Man" type shaped flap that leaves adequate depth for a prosthesis...
September 19, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28926194/inverse-response-of-osteoblasts-and-fibroblasts-to-growth-on-carbon-deposited-titanium-surfaces
#2
Chie Yoshihara, Takeshi Ueno, Peng Chen, Yusuke Tsutsumi, Takao Hanawa, Noriyuki Wakabayashi
Titanium implant surfaces may serve as attachment substrates for various cell types. Since carbon adsorption on titanium is inevitable, this study examined the negative/positive biological reaction of osteoblasts and fibroblasts on carbon-deposited titanium surfaces. Osteogenic MC3T3-E1 and fibrogenic NIH/3T3 cells were separately cultured on titanium disks on which carbon deposition was experimentally regulated to achieve titanium/carbon ratios of 6.5, 0.02, 0.005, and 0. The initial attachment of cells demonstrated that the quantity of attached osteoblasts on Ti/C (0...
September 19, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28924826/volumetric-and-linear-changes-at-dental-implants-following-grafting-with-volume-stable-three-dimensional-collagen-matrices-or-autogenous-connective-tissue-grafts-6-month-data
#3
Nadja Naenni, Stefan P Bienz, Goran I Benic, Ronald E Jung, Christoph H F Hämmerle, Daniel S Thoma
OBJECTIVES: The objective of this study was to test whether or not soft tissue augmentation with a volume-stable collagen matrix (VCMX) leads to similar volume gain around dental implants compared to autogenous subepithelial connective tissue graft (SCTG). MATERIALS AND METHODS: In 12 adult beagle dogs, immediate implants were placed with simultaneous guided bone regeneration. After 25-45 weeks, soft tissue augmentation was randomly performed using VCMX, SCTG, or a sham-operated control...
September 18, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28923270/definitive-abutments-placed-at-implant-insertion-and-never-removed-is-it-an-effective-approach-a-systematic-review-and-meta-analysis-of-randomized-controlled-trials
#4
REVIEW
Marco Tallarico, Martina Caneva, Silvio Mario Meloni, Erta Xhanari, Ugo Covani, Luigi Canullo
PURPOSE: To assess whether repeated abutment disconnections and reconnections have any impact on peri-implant bone resorption and soft tissue healing. MATERIALS AND METHODS: Electronic and manual searches were conducted for English-language articles published up to March 2017 that identified a relation between repeated disconnections of implant abutments (PA group) and prosthetic or implant failures, complications, marginal bone loss (MBL), soft tissue healing, and esthetic evaluation (pink esthetic score [PES]) after at least 1 year of function compared with implants receiving a final abutment at the time of implant placement (DA group)...
August 24, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28922244/fibular-graft-effective-panorama-for-prosthetic-rehabilitation-of-resected-mandible
#5
Pankaj Kharade, Saidul Islam, Mahesh Verma, Swati Sharma, Ranjeet Bodh
Surgical management of extensive tumors in the mandibular region leads to massive disfigurement of the face. Also the prosthetic outcome of such patients rehabilitated with free soft tissue flaps is very poor. Reconstruction of extensive defects to overcome the disfigurement is a challenging procedure and can be achieved with free fibula flap. Free fibula graft provides sufficient length of bone for the reconstruction of the postsurgical defects. Excellent vascularity of fibula flap allows for easy uptake of the graft and osseointegration of the dental implants...
September 15, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28915955/implications-of-bisphosphonate-calcium-ion-depletion-interfering-with-desmosome-epithelial-seal-in-osseointegrated-implants-and-pressure-ulcers
#6
Louis Z G Touyz, Kelvin I Afrashtehfar
Osteoporosis (OP) is a global bone disease prevalent in aging in humans, especially in older women. Bisphosphonates (BPs) are commonly used as therapy for OP as it influences hard and soft tissues calcium metabolism. Mucosal and dermal ulceration with exposure of underlying bone arises from incomplete epithelial recovery due to reduced desmosome formation deriving from lack of available calcium. Pathological situations such as bisphosphonate-related osteonecrosis of the jaw have been described. This hypothesis states other situations which demand intact functional desmosomes such as healing skin over chronic pressure points leading to pressure ulcers (as well-known as bedsores, pressure sores, pressure injuries, decubitus ulcers), and hemidesmosomes such as epithelial seals in contact with titanium surfaces will have a higher prevalence of breakdown among patients being treated with BPs...
September 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28914597/combination-of-ultrasonic-decontamination-soft-tissue-curettage-and-submucosal-air-polishing-with-povidone-iodine-application-for-non-surgical-therapy-of-peri-implantitis-12-months-clinical-outcomes
#7
Jamal M Stein, Christian Hammächer, Sareh Said-Yekta Michael
BACKGROUND: The aim of this study was to evaluate the clinical outcomes of a concept for non-surgical peri-implantitis combining stepwise mechanical debridement measures with adjuvant Povidone-iodine application with and without systemic antibiotics. METHODS: 45 patients with chronic periodontitis comprising 164 screw-typed implants with peri-implantitis were included. Peri-implantitis was defined as radiographic bone loss of >2 mm, probing pocket depth (PD) ≥5 mm with bleeding on probing (BOP)...
September 15, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28902426/surgical-treatment-of-peri-implantitis-3-year-results-from-a-randomized-controlled-clinical-trial
#8
Olivier Carcuac, Jan Derks, Ingemar Abrahamsson, Jan L Wennström, Max Petzold, Tord Berglundh
OBJECTIVES: This study reports on the 3-year follow-up of patients enrolled in a randomized controlled clinical trial on surgical treatment of advanced peri-implantitis. MATERIAL & METHODS: 100 patients with advanced peri-implantitis were randomly assigned to one of four treatment groups. Surgical therapy aiming at pocket elimination was performed and, in three test groups, supplemented by either systemic antibiotics, use of an antiseptic agent for implant surface decontamination or both...
September 13, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28902420/one-piece-zirconia-oral-implants-for-single-tooth-replacement-three-year-results-from-a-long-term-prospective-cohort-study
#9
Ralf-Joachim Kohal, Benedikt Christopher Spies, Annalena Bauer, Frank Butz
AIM: This 3-year report of a prospective long-term cohort investigation aimed to evaluate the clinical and radiographic outcomes of a one-piece zirconia oral implant for single tooth replacement. MATERIALS AND METHODS: 65 patients received a 1-stage implant surgery with immediate temporization. Standardized radiographs were taken at implant insertion, after 1 year, and after 3 years to monitor peri-implant bone levels. A univariate analysis of the association of different baseline parameters on marginal bone loss from implant insertion to 36 months was performed...
September 13, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28867525/a-customised-digitally-engineered-solution-for-fixed-dental-rehabilitation-in-severe-bone-deficiency-a-new-innovative-line-extension-in-implant-dentistry
#10
Nils-Claudius Gellrich, Rüdiger M Zimmerer, Simon Spalthoff, Philipp Jehn, Philipp-Cornelius Pott, Majeed Rana, Björn Rahlf
OBJECTIVES: Numerous procedures including soft and hard tissue reconstructions are necessary to allow for final implant-borne dental rehabilitation in patients with severe alveolar atrophy or resected jaws. In these cases, customised digitally engineered patient solutions for fixed or removable dental rehabilitation provide an innovative line extension to conventional implant dentistry. MATERIAL AND METHODS: A wax-up was performed on plaster models that were scanned by 3D laser...
August 3, 2017: Journal of Cranio-maxillo-facial Surgery
https://www.readbyqxmd.com/read/28861284/alveolar-socket-preservation-with-demineralised-bovine-bone-mineral-and-a-collagen-matrix
#11
Carlo Maiorana, Pier Paolo Poli, Matteo Deflorian, Tiziano Testori, Federico Mandelli, Heiner Nagursky, Raffaele Vinci
PURPOSE: The aim of the present study was to evaluate the healing of post-extraction sockets following alveolar ridge preservation clinically, radiologically, and histologically. METHODS: Overall, 7 extraction sockets in 7 patients were grafted with demineralised bovine bone mineral and covered with a porcine-derived non-crosslinked collagen matrix (CM). Soft tissue healing was clinically evaluated on the basis of a specific healing index. Horizontal and vertical ridge dimensional changes were assessed clinically and radiographically at baseline and 6 months after implant placement...
August 2017: Journal of Periodontal & Implant Science
https://www.readbyqxmd.com/read/28856707/maxillary-implant-supported-overdentures-opposed-by-partial-natural-dentitions-a-5-year-prospective-case-series-study
#12
G C Boven, J W A Slot, G M Raghoebar, A Vissink, H J A Meijer
PURPOSE: To assess the 5-year treatment outcome of maxillary implant-retained overdentures opposed by natural antagonistic teeth. METHODS: 50 consecutive patients received maxillary overdentures supported by six dental implants. Implants were placed in the anterior region, if enough bone was present (n=25 patients) Implant were placed in the posterior region if implant placement in in the anterior region was not possible (n=25 patients). Variables assessed included survival of implants, condition of hard and soft peri-implant tissues, and patients' satisfaction...
August 30, 2017: Journal of Oral Rehabilitation
https://www.readbyqxmd.com/read/28844965/osteosynthesis-of-a-cranio-osteoplasty-with-a-biodegradable-magnesium-plate-system-in-miniature-pigs
#13
Hendrik Naujokat, Jan-Marten Seitz, Yahya Açil, Timo Damm, Inga Möller, Aydin Gülses, Jörg Wiltfang
Biodegradable magnesium alloys are a new class of implant material suitable for bone surgery. The aim of this study was to investigate plates and screws made of magnesium for osteosynthesis in comparison to titanium in a cranial fracture model. Implants were used for internal fixation of a cranio-osteoplasty in nine minipigs. Computed tomography was conducted repeatedly after surgery. The implants and the adjacent tissues were harvested 10, 20 and 30 weeks after surgery and investigated by micro-computed tomography and histological analysis...
August 24, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28842739/exploring-metal-artifact-reduction-using-dual-energy-ct-with-pre-metal-and-post-metal-implant-cadaver-comparison-are-implant-specific-protocols-needed
#14
Ruud H H Wellenberg, Johanna C E Donders, Peter Kloen, Ludo F M Beenen, Roeland P Kleipool, Mario Maas, Geert J Streekstra
OBJECTIVE: To quantify and optimize metal artifact reduction using virtual monochromatic dual-energy CT for different metal implants compared to non-metal reference scans. METHODS: Dual-energy CT scans of a pair of human cadaver limbs were acquired before and after implanting a titanium tibia plate, a stainless-steel tibia plate and a titanium intramedullary nail respectively. Virtual monochromatic images were analyzed from 70 to 190 keV. Region-of-interest (ROI), used to determine fluctuations and inaccuracies in CT numbers of soft tissues and bone, were placed in muscle, fat, cortical bone and intramedullary tibia canal...
August 25, 2017: Skeletal Radiology
https://www.readbyqxmd.com/read/28842287/determining-potential-of-pmma-as-a-depot-for-rifampin-to-treat-recalcitrant-orthopaedic-infections
#15
Stefanie M Shiels, David J Tennent, Kevin S Akers, Joseph C Wenke
BACKGROUND: Open fractures are often complicated by infection. In cases of severe soft tissue and vascular injury, systemic antibiotics may be ineffective due to their inability to reach and provide direct antimicrobial activity to the zone of injury. High antibiotic concentrations within the wound can be achieved with reduced systemic toxicity by using local antibiotic delivery. As bacteria associated with musculoskeletal injuries frequently form biofilms, antibiotic selection is important...
August 16, 2017: Injury
https://www.readbyqxmd.com/read/28841384/rehabilitation-with-an-implant-supported-metal-acrylic-fixed-prosthesis-after-ameloblastoma-resection-in-mandible-clinical-case-letter
#16
Julide Ozen, Behcet Erol, Sibel Dikicier, Gulce Alp
The majority of patients often have functional problems after undergoing jaw reconstruction. These patients require intense rehabilitation, including surgical and prosthodontic procedures to maximize function, esthetics, and to preserve mastication, speech, and appearance. This clinical report describes the rehabilitation of a patient who had a large tumor resection of ameloblastoma of the mandible resulting in hard and soft tissue deficiency. The mandible was reconstructed with an iliac bone graft with simultaneous tumor removal...
August 25, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28840296/stability-of-two-versus-three-peripheral-pegs-of-the-glenoid-component-in-modern-total-shoulder-arthroplasty
#17
Eugene F Stautberg, Daniel C Jupiter, Arsalan Amin, Ali A Qadeer, Omer A Ilahi
PURPOSE: In total shoulder arthroplasty (TSA), the optimum number of peripheral pegs required for stability in the glenoid component is unknown. This study compared the stability of two versus three peripheral pegs in cemented glenoid components possessing a central press-fit peg. METHODS: Six unmodified glenoid components with three peripheral pegs, a large, central press-fit peg and six modified glenoid components with one inferior peripheral peg sharply removed were cemented into bone substitute polyurethane blocks...
August 24, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28818689/sol-gel-derived-hydroxyapatite-films-over-porous-calcium-polyphosphate-substrates-for-improved-tissue-engineering-of-osteochondral-like-constructs
#18
Whitaik David Lee, Rahul Gawri, Robert M Pilliar, William L Stanford, Rita A Kandel
Integration of in vitro-formed cartilage on a suitable substrate to form tissue-engineered implants for osteochondral defect repair is a considerable challenge. In healthy cartilage, a zone of calcified cartilage (ZCC) act as an intermediary for mechanical force transfer from soft to hard tissue, as well as an effective interlocking structure to better resist interfacial shear forces. We have developed biphasic constructs that consist of scaffold-free cartilage tissue grown in vitro on, and interdigitated with, porous calcium polyphosphate (CPP) substrates...
August 14, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28817740/influence-of-microtextured-implant-surfaces-on-peri-implantitis-and-its-treatment-a-preclinical-trial
#19
Juan C Rodriguez, Tapan Koticha, Diana L Eubanks, Ivan Rudek, Fred J Molz, Ludovica Chiavaccini, Andrew Claude, Steven Elder, Hom-Lay Wang
PURPOSE: The prevalence of peri-implantitis has increased significantly, forcing clinicians to search for ways to prevent it. Laser-microtextured surfaces promote soft tissue attachment and provide a tight seal around implants. Hence, the aim of this study was to examine the clinical, radiographic, and histologic features of ligature-induced peri-implantitis, as well as the effect of surgical treatment of these induced peri-implantitis lesions on laser-microtextured implants in a controlled animal model...
August 17, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28817244/key-developments-that-impacted-the-field-of-mechanobiology-and-mechanotransduction
#20
Michelle Wall, David Butler, Alicia El Haj, Josephine C Bodle, Elizabeth G Loboa, Albert J Banes
Advances in mechanobiology have evolved through insights from multiple disciplines including structural engineering, biomechanics, vascular biology, and orthopaedics. In this paper, we reviewed the impact of key reports related to the study of applied loads on tissues and cells and the resulting signal transduction pathways. We addressed how technology has helped advance the burgeoning field of mechanobiology (over 33,600 publications from 1970 to 2016). We analyzed the impact of critical ideas and then determined how these concepts influenced the mechanobiology field by looking at the citation frequency of these reports as well as tracking how the overall number of citations within the field changed over time...
August 17, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
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