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https://www.readbyqxmd.com/read/28212454/clinical-comparison-of-screw-retained-and-screwless-morse-taper-implant-abutment-connections-one-year-postloading-results
#1
Esma Geckili, Onur Geckili, Hakan Bilhan, Omer Kutay, Tayfun Bilgin
PURPOSE: The purpose of this study was to clinically evaluate the screwless Morse taper implant-abutment connection type, in which the retention screw is totally eliminated, in terms of stability, success, periodontal parameters, and marginal bone levels after 1 year of function by comparing it with a passive fit internal implant-abutment connection, wherein a space exists between the matching components. MATERIALS AND METHODS: Each edentulous subject received an implant with a screwless Morse taper connection (MT) in the left canine area of the mandible and an implant with a screw-retained implant-abutment connection (SR) in the right canine area of the mandible...
February 17, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28209379/endocultivation-continuous-application-of-rhbmp-2-via-mini-osmotic-pumps-to-induce-bone-formation-at-extraskeletal-sites
#2
B E Beck-Broichsitter, S T Becker, H Seitz, J Wiltfang, P H Warnke
The continuous presence of recombinant human bone morphogenetic protein 2 (rhBMP-2) inside a scaffold may be crucial to the outcome in bone tissue engineering. This study investigated whether the release of the growth factor rhBMP-2 via different continuous application schemes influences histomorphological aspects of the hard and soft tissues induced. Three-dimensionally printed hydroxyapatite scaffolds were implanted into one latissimus dorsi muscle of 42 female Lewis rats. Simultaneously implanted mini-osmotic pumps were used to provide a continuous application of rhBMP-2 over 1, 2, or 4 weeks (total dose 200μg)...
February 10, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28209275/contact-kinematic-differences-between-gap-balanced-vs-measured-resection-techniques-for-single-radius-posterior-stabilized-total-knee-arthroplasty
#3
Matthew G Teeter, Kevin I Perry, Xunhua Yuan, James L Howard, Brent A Lanting
BACKGROUND: Measured resection (MR) and gap balancing (GB) are common surgical techniques for total knee arthroplasty (TKA). Controversy has arisen as each conceptually differs in how the knee is balanced through bone and soft tissue management. The objective of the present study was to compare both the frequency of condylar liftoff and the location of femorotibial contact from extension through midflexion between patients undergoing GB or MR TKA. METHODS: A total of 24 knees (23 patients) were randomly assigned at referral to either a surgeon performing MR or GB TKA with the same single radius, posterior-stabilized implant (12 per cohort)...
January 11, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28208057/vertical-alveolar-distraction-osteogenesis-of-the-atrophic-posterior-mandible-before-dental-implant-insertion
#4
Adi Rachmiel, Dekel Shilo, Dror Aizenbud, Omri Emodi
PURPOSE: Augmentation of deficient mandibular posterior alveolar ridges poses a great challenge because of extensive bone deficiency and the presence of the inferior alveolar nerve. This study sets its focus on vertical alveolar distraction osteogenesis (ADO) at the posterior mandible before dental implant placement. MATERIALS AND METHODS: The study included 21 sites in 18 patients with severe mandibular posterior alveolar ridge deficiency. A trapezoidal osteotomy was performed, and an extraosseous alveolar distraction device was fixed and activated after a 4-day latency period at a rate of 0...
January 21, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28208056/oral-rehabilitation-of-a-patient-with-ectodermal-dysplasia-treated-with-fresh-frozen-bone-allografts-and-computer-guided-implant-placement-a-clinical-case-report
#5
Carlo Maiorana, Pier Paolo Poli, Carlo Poggio, Paola Barbieri, Mario Beretta
Ectodermal dysplasia (ED) is an inherited disorder characterized by abnormality of ectodermally derived structures. A recurrent oral finding is oligodontia, which in turn leads to a severely hypotrophic alveolar process with typical knife-edge morphology and adverse ridge contours. This unfavorable anatomy can seriously hamper proper implant placement. Fresh-frozen bone (FFB) allografts recently have been proposed to augment the residual bone volume for implant placement purposes; however, scientific evidence concerning the use of FFB to treat ED patients is absent...
January 20, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28196474/biodegradable-magnesium-herbert-screw-image-quality-and-artifacts-with-radiography-ct-and-mri
#6
Lena Sonnow, Sören Könneker, Peter M Vogt, Frank Wacker, Christian von Falck
BACKGROUND: Magnesium alloys have recently been rediscovered as biodegradable implants in musculoskeletal surgery. This study is an ex-vivo trial to evaluate the imaging characteristics of magnesium implants in different imaging modalities as compared to conventional metallic implants. METHODS: A CE-approved magnesium Herbert screw (MAGNEZIX®) and a titanium screw of the same dimensions (3.2x20 mm) were imaged using different modalities: digital radiography (DX), multidetector computed tomography (MDCT), high resolution flat panel CT (FPCT) and magnetic resonance imaging (MRI)...
February 14, 2017: BMC Medical Imaging
https://www.readbyqxmd.com/read/28196173/single-tooth-implant-restorations-in-fresh-extraction-sockets-of-the-maxillary-esthetic-zone-two-year-results-of-a-prospective-cohort-study
#7
Jeffrey Ganeles, Frederic J Norkin, Samuel Zfaz
In this prospective study, 15 patients received 15 variable-thread tapered implants placed in fresh extraction sites in the maxillary esthetic zone and immediately were provisionalized out of occlusion. Of the 15 patients, 11 completed their 2-year follow-up. At 2 years, the success and cumulative survival rates were both 100%, and the mean bone level gain was 0.83 mm. Soft tissue assessment showed no zero esthetic scores, improved papilla indices, and low bleeding on probing and plaque accumulation. Overall, the study implants showed excellent hard tissue, soft tissue, and esthetic outcomes, indicating a healthy tissue response in single-tooth extraction sites in the maxillary esthetic zone...
March 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28196156/clinical-and-histologic-evaluations-of-sla-dental-implants
#8
Myron Nevins, Stefano Parma-Benfenati, Franco Quinti, Prima Galletti, Cosmin Sava, Catalin Sava, David M Kim
The goal of this investigation was to evaluate the efficacy of dental implants with a surface that was sandblasted with large grit and acid etched in a human model. Eight patients volunteered to allow the biopsy of a small implant in exchange for complete dental rehabilitation at no cost. All biopsy sites received soft and hard tissue reconstruction, and this report provides observation of successful bone-to-implant contact and successful prosthesis construction for the patient. The patients enthusiastically reported improved quality of life as a result of participation in this study...
March 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28196155/subperiosteal-minimally-invasive-aesthetic-ridge-augmentation-technique-smart-a-new-standard-for-bone-reconstruction-of-the-jaws
#9
Ernesto A Lee
Traditional guided bone regeneration techniques include flap mobilization and placement of a bone graft, often with the use of space-maintaining devices and cell-occlusive membranes. This approach is associated with frequent complications that negatively affect the outcome of the augmentation and the peri-implant soft tissue esthetics. Although current tunneling techniques have focused on periodontal soft tissue applications, earlier publications described their use for horizontal augmentation of mandibular posterior edentulous ridges in full-denture patients...
March 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28194713/use-of-compressive-osseointegration-endoprostheses-for-massive-bone-loss-from-tumor-and-failed-arthroplasty-a-viable-option-in-the-upper-extremity
#10
Krista A Goulding, Adam Schwartz, Steven J Hattrup, R Lor Randall, Donald Lee, Damian M Rispoli, Daniel M Lerman, Christopher Beauchamp
BACKGROUND: Endoprostheses using principles of compressive osseointegration have shown good survivorship in several studies involving the lower extremity; however, no series to our knowledge have documented the use of this technology in the management of massive bone loss in the upper limb. QUESTIONS/PURPOSES: (1) What proportion of upper extremity implants using compressive osseointegration fixation principles achieved durable short-term fixation, and what were the modes of failure? (2) What surgical complications resulted from reconstruction using this technique? METHODS: A multiinstitutional retrospective review identified nine patients (five women; four men) who underwent 13 endoprosthetic replacements between 2003 and 2014 using compressive osseointegration (Compliant(®) Pre-stress Device [CPS]; Biomet Inc, Warsaw, IN, USA) in the upper extremity, including two proximal humeri, two humeral diaphyses, seven distal humeri, and two proximal ulna...
February 13, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28186691/balancing-microbial-and-mammalian-cell-functions-on-calcium-ion-modified-implant-surfaces
#11
Eduardo Anitua, Ricardo Tejero, Miguel Ángel Pacha-Olivenza, María Coronada Fernández-Calderón, María Delgado-Rastrollo, Mari Mar Zalduendo, María Troya, Ciro Pérez-Giraldo, María Luisa González-Martín
Implant integration is a complex process mediated by the interaction of the implant surface with the surrounding ions, proteins, bacteria, and tissue cells. Although most implants achieve long-term bone-tissue integration, preventing pervasive implant-centered infections demands further advances, particularly in surfaces design. In this work, we analyzed classical microrough implant surfaces (only acid etched, AE; sandblasted then acid etching, SB + AE) and a new calcium-ion-modified implant surface (AE + Ca) in terms of soft- and hard-tissue integration, bacterial adhesion, and biofilm formation...
February 10, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28181688/dental-implants-and-bone-augmentation-in-hiv-infected-patients-under-haart-case-report-and-review-of-the-literature
#12
Fábio Vidal, Rafael Vidal, Jeter Bochnia, Rodrigo Carvalho de Souza, Lucio Souza Gonçalves
The present study reviewed the literature regarding dental implants in HIV-infected patients and reports the long-term follow-up of three clinical cases of patients under HAART that received bone augmentation and dental implants. The first case presents a young patient with a large defect in the mandible, as a consequence of a longitudinal fracture, that was treated with guided bone regeneration (GBR) previously to implant placement. The second case reported is middle-aged man with a fractured upper lateral incisor treated with immediate placement and simultaneous GBR to repair the dehiscence due to the buccal bone resorption...
February 9, 2017: Special Care in Dentistry
https://www.readbyqxmd.com/read/28178323/non-invasive-evaluation-of-facial-crestal-bone-with-ultrasonography
#13
Hsun-Liang Chan, Khaled Sinjab, Ming-Pang Chung, Yi-Chen Chiang, Hom-Lay Wang, William V Giannobile, Oliver D Kripfgans
PURPOSE: Facial crestal bone level and dimension determine function and esthetics of dentition and dental implants. We have previously demonstrated that ultrasound can identify bony and soft tissue structures in the oral cavity. The aim of this study is to evaluate the accuracy of using ultrasound to measure facial crestal bone level and thickness. MATERIALS AND METHODS: A commercially available medical ultrasound scanner, paired with a 14 MHz imaging probe was used to scan dental and periodontal tissues at the mid-facial site of each tooth on 6 fresh cadavers...
2017: PloS One
https://www.readbyqxmd.com/read/28174364/evaluation-of-periodontal-changes-adjacent-to-extraction-sites-during-upper-canine-retraction
#14
Azzam Al-Jundi, Basem Al Sabbagh, Jagan K Baskaradoss
INTRODUCTION: There is an intimate relationship between orthodontic therapy and the periodontal changes that occur during tooth movement. MATERIALS AND METHODS: This prospective clinical trial aims at investigating the movement of both the free and attached gingiva, as well as the movement of the alveolar bone in the extraction site of the upper 1st premolars during the retraction of the upper canines. In this study, 17 patients (10 female, 7 male) requiring 1st premolar extraction before orthodontic tooth movement were selected and treated at the Department of Orthodontics in the Faculty of Dentistry in University of Hama, Hama, Syria...
February 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28168420/immediate-post-extraction-implants-with-or-without-pure-platelet-rich-plasma-a-5-year-follow-up-study
#15
Silvio Taschieri, Alessandra Lolato, Moses Ofer, Tiziano Testori, Luca Francetti, Massimo Del Fabbro
PURPOSE: The purpose of this study was comparison of clinical and radiographic outcomes of immediate post-extraction implants with or without the use of pure platelet-rich plasma (P-PRP) in the short- and medium-term follow-up. METHODS: A retrospective analysis was performed to assess soft tissue healing, implant and prosthesis survival, marginal bone level changes and biological complications. RESULTS: A total of 109 partially edentulous patients with 126 implants were included in this analysis...
February 7, 2017: Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28167874/design-considerations-for-the-next-generation-hip-resurfacing-implant-commentary
#16
Edwin P Su
The current generation of hip resurfacing consists of a metal-on-metal ball and monoblock socket of minimal thickness. Although results in certain patient subgroups have been excellent at up to 15 years of follow-up, other subgroups have had poor results. The hard-on-hard bearing is susceptible to edge-loading conditions and may produce excessive metallic debris; furthermore, other patients have had allergic reactions to the metal byproducts. In both situations, there can be clinical failures from adverse local tissue reactions...
February 2017: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/28160030/-fixed-bearing-unicondylar-arthroplasty-in-medial-osteoarthritis-of-the-knee
#17
R Becker, C Paech, A Denecke
OBJECTIVE: The unicondylar prosthesis replaces the medial femerotibial compartment only, the part presenting with osteoarthritic changes. The remaining compartments of the knee present less osteoarthritic changes and thus can be preserved. INDICATIONS: Osteoarthritis of the medial femorotibial compartment is the ideal indication for unicondylar arthroplasty. The knee should show an intraarticular deformity, which means the malalignment is caused by the osteoarthritic changes of the medial compartment...
February 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28156187/a-peri-implantitis-associated-with-a-pre-existing-pathology
#18
S E-L I M Oh
This case report presents a treatment of peri-implantitis associated with a pre-existing pathology. Peri-implantitis around the implant #19 was detected from pus discharge upon probing. Guided bone regeneration was performed to treat peri-implantitis with the administration of antibiotics. The histopathologic evaluation of soft tissue taken from the circumferential defect around the implant exhibited a cyst. The post-surgical CBCT and the follow-up radiograph confirmed the maturing bone graft and a reduced size of the defect around the implant...
February 3, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28142350/giant-cell-tumor-of-distal-radius-treated-with-ulnar-translocation-and-wrist-arthrodesis
#19
Abhijeet Ashok Salunke, Jaymin Shah, Vikas Warikoo, Amit Chakraborty, Harshwardhan Pokharkar, Yongsheng Chen, Manish Pruthi, Jyotindra Pandit
INTRODUCTION: The aim is to analyze the functional outcomes of patients of giant cell tumor (GCT) of distal radius treated with ulnar translocation and wrist arthrodesis. METHODS: Study included 25 patients of aggressive GCT of distal radius, resected and reconstructed using ulnar translocation and wrist arthrodesis. The ulna-carpal radius fixation was performed with plate and screws. The patients were followed to bony union and minimum follow-up was 1 year. RESULT: Twenty-two patients were of Campanacci grade 3 and three patients were of Campanacci grade2...
January 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28135574/effect-of-nd-yag-laser-assisted-non-surgical-mechanical-debridement-on-clinical-and-radiographic-peri-implant-inflammatory-parameters-in-patients-with-peri-implant-disease
#20
Tariq Abduljabbar, Fawad Javed, Sergio Varela Kellesarian, Fahim Vohra, Georgios E Romanos
BACKGROUND AND AIM: The efficacy of neodymium-doped yttrium aluminium garnet (Nd:YAG) laser-assisted non-surgical mechanical debridement (MD) in the treatment of periimplant diseases remains uninvestigated. The aim was to assess the efficacy of Nd:YAG laser-assisted non-surgical MD on clinical and radiographic periimplant inflammatory parameters in patients with periimplant disease. METHODS: Treatment wise, 63 male patients with periimplant diseases were divided into 2 groups: Group-1 (32 patients): treatment of periimplant disease using MD alone (control group); and Group-2 (n=31 patients): treatment of periimplant disease using MD with a single application of Nd:YAG laser...
January 21, 2017: Journal of Photochemistry and Photobiology. B, Biology
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