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https://www.readbyqxmd.com/read/27914668/three-dimensional-finite-element-analysis-of-implant-assisted-removable-partial-dentures
#1
Ju-Won Eom, Young-Jun Lim, Myung-Joo Kim, Ho-Beom Kwon
STATEMENT OF PROBLEM: Whether the implant abutment in implant-assisted removable partial dentures (IARPDs) functions as a natural removable partial denture (RPD) tooth abutment is unknown. PURPOSE: The purpose of this 3-dimensional finite element study was to analyze the biomechanical behavior of implant crown, bone, RPD, and IARPD. MATERIAL AND METHODS: Finite element models of the partial maxilla, teeth, and prostheses were generated on the basis of a patient's computed tomographic data...
November 30, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27902498/immediate-replacement-of-single-teeth-with-immediately-loaded-implants-retrospective-analysis-of-a-clinical-case-series
#2
Ashok Sethi, Thomas Kaus
INTRODUCTION: The purpose of this retrospective analysis of clinical data was to evaluate the predictability of replacing failing single teeth with immediately placed implants loaded via a transitional (provisional) restoration. MATERIALS AND METHODS: Implants were placed immediately at the time of extraction of failing single teeth that met predetermined inclusion criteria. A detailed protocol was followed to enable immediate loading of the implant with the use of prefabricated abutments in combination with transitional restorations...
November 29, 2016: Implant Dentistry
https://www.readbyqxmd.com/read/27891261/perioprosthetic-and-implant-supported-rehabilitation-of-complex-cases-clinical-management-and-timing-strategy
#3
Luca Landi, Stefano Piccinelli, Roberto Raia, Fabio Marinotti, Paolo Francesco Manicone
Treatment of complex perioprosthetic cases is one of the clinical challenges of everyday practice. Only a complete and thorough diagnostic setup may allow the clinician to formulate a realistic prognosis to select the abutments to support prosthetic rehabilitation. Clinical, radiographic, or laboratory parameters used separately are useless to correctly assign a reliable prognosis to single teeth except in the case of a clearly hopeless tooth. Therefore, it is crucial to gather the greatest quantity of data to determine the role that every single element can play in the prosthetic rehabilitation of the case...
2016: Case Reports in Dentistry
https://www.readbyqxmd.com/read/27888491/twist-removal-of-healed-vs-nonhealed-implants-a-mechanical-and-histological-study-in-mini-pigs
#4
Ricardo de Oliveira Silva, Fabrício Passador, Paulo Henrique Ferreira Caria
PURPOSE: The objective of this study was to evaluate the effect of removal torque (reverse torque) of titanium implants in peri-implant bone. METHODS: The P1-M1 teeth were extracted bilaterally of 6 mini pigs (BR-1). Each animal received 6 titanium implants, three for each side of mandible. On the right side of mandible, 3 implants reminded 9 months (9M) under masticatory activity and on the left side, other 3 implants were placed and immediately removed (IR). All 36 implants were removed by removal torque, and the recorded values were statistically analyzed...
December 2016: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/27883203/impact-of-platform-switching-on-interproximal-bone-levels-around-8-5-mm-implants-in-the-posterior-region-5-year-results-from-a-randomized-clinical-trial
#5
Gerdien Telleman, Gerry M Raghoebar, Arjan Vissink, Henny J A Meijer
AIM: To assess the medium-term results of 8.5 mm implants supplied with a conventional platform-matched implant-abutment connection or a platform-switched design. MATERIALS & METHODS: Eighty patients with 1 or more missing teeth in the maxillary or mandibular posterior zone were randomly assigned for treatment with implants with a conventional (control group) or platform-switched (test group) implant-abutment connection. Follow-up visits were conducted 1 month, 1 year and 5 years after functional loading...
November 24, 2016: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/27881315/cad-cam-implant-supported-fixed-complete-dental-prosthesis-with-titanium-milled-molars-a-clinical-report
#6
Abdulaziz AlHelal, Bader AlBader, Mathew T Kattadiyil, Antoanela Garbacea, Periklis Proussaefs
Implant-supported fixed complete dental prostheses have been associated with a high implant success rate in long-term studies. However, they have also been associated with a high frequency of prosthetic complications. The most frequent and primary prosthetic complication has been the fracture or wear of the occlusal surface of acrylic resin teeth that are typically attached to a metal framework. The design of the framework in this clinical report involved the incorporation of metal occlusal surfaces for the posterior first molars to the framework...
October 27, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27878464/impact-of-abutment-material-on-peri-implant-soft-tissue-color-an-in-vitro-study
#7
Sala Leticia, Bascones-Martínez Antonio, Carrillo-de-Albornoz Ana
OBJECTIVES: The objectives of the present study is to determine the differences in peri-implant soft tissue color with the utilization of titanium, titanium gold-plated, white zirconia, Vita Classical (VC) A4-shaded zirconia, and fluorescent white zirconia abutments and to establish the influence of gingival thickness on the resulting color. METHODS: Four implants were contralaterally inserted in 19 fresh pig mandibles, and the color of the peri-implant mucosa with the different abutments was spectrophotometrically measured at 1-, 2-, and 3-mm height from the margin...
November 22, 2016: Clinical Oral Investigations
https://www.readbyqxmd.com/read/27872552/preserving-esthetics-occlusion-and-occlusal-vertical-dimension-in-a-patient-with-fixed-prostheses-seeking-dental-implant-treatment
#8
Abdulaziz Al Baker, Syed Rashid Habib, Mohammad D Al Amri
The preservation of esthetics and occlusal vertical dimension is critical in patients with existing full-arch tooth-retained fixed prostheses. This clinical report describes the provision of a maxillary immediate complete denture in a patient with a maxillary full-arch fixed dental prosthesis over nonviable teeth. The existing fixed dental prosthesis was used in the fabrication of the maxillary immediate complete denture to preserve esthetics. The technique involved recording and preservation of the occlusal vertical dimension and occlusion of the existing prosthesis...
October 2016: Saudi Dental Journal
https://www.readbyqxmd.com/read/27868340/dental-attendance-patterns-among-older-people-a-retrospective-review-of-records-in-public-and-private-dental-care-in-sweden
#9
C Derblom, M-L Hagman-Gustafsson, P Gabre
OBJECTIVES: Nowadays, older people retain their natural teeth more frequently and so are at increased risk of oral disease. At the same time, discontinued contacts with dental services prevent access to preventive care and increase the risk of undetected disease. This study aims to evaluate how often older people discontinue regular dental visits and to establish the reasons. METHODS: This study is a retrospective review of records of patients aged ≥75 years from seven Swedish clinics, three in the public dental service (PuDS) and four in the private (PrDS)...
November 20, 2016: International Journal of Dental Hygiene
https://www.readbyqxmd.com/read/27867255/bone-formation-in-maxillary-sinus-lift-using-autogenous-bone-graft-at-2-and-6-months
#10
Henrique Duque Netto, Maria das Graças Alfonso Miranda Chaves, Beatriz Aatrstrup, Renata Guerra, Sergio Olate
The aim of this study is to compare the bone formation in maxillary sinus lift with an autogenous bone graft in histological evaluation at 2 or 6 months. A comparative study was designed where 10 patients with missing teeth bilaterally in the posterior zone of the maxilla were selected. Patients received a particulate autogenous bone graft under the same surgical conditions, selecting a site to collect a biopsy and histological study at two months and another at six months postoperatively. Histomorphometry was performed and were used Kolmogorov-Smirnov test, student's t-test and Spearman's correlation coefficient, considering a value of p<0...
September 2016: International Journal of Morphology
https://www.readbyqxmd.com/read/27864641/an-open-prospective-single-cohort-multicenter-study-evaluating-the-novel-tapered-conical-connection-implants-supporting-single-crowns-in-the-anterior-and-premolar-maxilla-interim-1-year-results
#11
Alexander Fügl, Werner Zechner, Alessandro Pozzi, Guido Heydecke, Christine Mirzakhanian, Nikolaus Behneke, Alexandra Behneke, Russell A Baer, Robert Nölken, Edward Gottesman, Snjezana Colic
OBJECTIVES: The aim of this multicenter prospective clinical study was to evaluate anodized tapered implants with a conical connection and integrated platform shifting placed in the anterior and premolar maxilla. MATERIALS AND METHODS: The study enrolled patients requiring single-tooth restorations in healed sites of maxillary anterior and premolar teeth. All implants were immediately temporized. Clinical and radiographic evaluations were conducted at implant insertion, 6 months, and 1 year...
November 18, 2016: Clinical Oral Investigations
https://www.readbyqxmd.com/read/27862629/secreted-ectodomain-of-sialic-acid-binding-ig-like-lectin-9-and-mcp-1-synergistically-regenerate-transected-rat-peripheral-nerves-by-altering-macrophage-polarity
#12
Fumiya Kano, Kohki Matsubara, Minoru Ueda, Hideharu Hibi, Akihito Yamamoto
Peripheral nerves exhibit remarkable self-repairing reparative activity after a simple crush or cut injury. However, the neuronal transection involving a nerve gap overwhelms their repairing activity and causes persistent paralysis. Here, we show that an implantation of the serum-free conditioned medium from stem cells from human exfoliated deciduous teeth (SHED-CM) immersed in a collagen sponge into the nerve gap formed by rat facial nerves transection restored the neurological function. In contrast, SHED-CM specifically depleted of a set of anti-inflammatory M2 macrophage inducers, Monocyte monocyte chemoattractant protein-1 (MCP-1) and the secreted ectodomain of sialic acid-binding Ig-like lectin-9 (sSiglec-9) lost the ability to restore neurological function in this model...
November 10, 2016: Stem Cells
https://www.readbyqxmd.com/read/27861669/bone-level-changes-around-delayed-dental-implants-in-previous-large-bone-defects-filled-with-reactive-soft-tissue-after-extraction-a-cone-beam-computed-tomography-study
#13
Roberto Crespi, Paolo Capparé, Giovanni Crespi, Giorgio Gastaldi, Enrico Gherlone
PURPOSE: The objective of this study was to evaluate new bone regeneration around delayed implants positioned in large bone defects, filled with reactive soft tissue, using cone beam computed tomography (CBCT) at a follow-up of 3 years. MATERIALS AND METHODS: Patients presented large bone defects after tooth extraction. Reactive soft tissue was left in the defects, and no grafts were used. CBCT scans were performed before tooth extraction and upon implant placement (at 3 months after extraction), and bone volume measurements were then evaluated 3 years after implant placement...
November 2016: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/27861137/computer-assisted-system-on-mandibular-canal-detection
#14
Da-Chuan Cheng, Li-Wei Chen, Yen-Wen Shen, Lih-Jyh Fuh
BACKGROUND: A dentist always checks a patient by using panoramic radiography (PR) initially. The measurement of the minimal distance (MD) between the alveolar crest and the mandibular canal (MC) superior border is critically important before the dental implant surgery, extraction of 3rd molar teeth or any surgery in the posterior area of minimal distance (MD). However, the image of MC is not always clear to identify. OBJECTIVE: A software is needed for training dentists as well as a tool of demonstration to patients in clinics precisely and quickly...
November 18, 2016: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/27858074/-comparison-of-treatment-results-between-implant-anchorage-and-traditional-intraoral-anchorage-in-patients-with-maxillary-protrusion
#15
Ning Ma, Wei-Ran Li, Xiao-Hong Chen, Xu Zheng
PURPOSE: To compare the treatment effects in patients with maxillary protrusion between implant anchorage and traditional intraoral anchorage. METHODS: Thirty patients with maxillary protrusion treated with bilateral maxillary first premolars extractions and high anchorage were selected. They were randomly divided into implant anchorage group and traditional intraoral anchorage group. Each group had 15 cases. The casts and the cephalograms were obtained before treatment (T1) and after treatment (T2)...
August 2016: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/27857819/osseointegration-of-dental-implants-in-a-patient-with-hajdu-cheney-syndrome
#16
Panagiota Dokou, Ioannis K Karoussis, George Papavasiliou, Phophi Kamposiora, Theophilos P Vrahopoulos, John A Vrotsos
BACKGROUND: Hajdu-Cheney Syndrome (HCS) is a rare hereditary bone metabolism disorder characterized by acro-osteolysis, short stature, craniofacial changes, periodontitis and premature tooth loss. Extensive search of the current literature revealed no reports of implant placement in patients with HCS. CASE REPORT: A 22-year old woman with osteoporosis, generalized advanced chronic periodontitis and premature tooth loss was referred to the Postgraduate Clinic of Periodontology, University of Athens-Greece...
2016: Open Dentistry Journal
https://www.readbyqxmd.com/read/27856967/nanosized-building-blocks-for-customizing-novel-antibiofilm-approaches
#17
A J Paula, H Koo
Recent advances in nanotechnology provide unparalleled flexibility to control the composition, size, shape, surface chemistry, and functionality of materials. Currently available engineering approaches allow precise synthesis of nanocompounds (e.g., nanoparticles, nanostructures, nanocrystals) with both top-down and bottom-up design principles at the submicron level. In this context, these "nanoelements" (NEs) or "nanosized building blocks" can 1) generate new nanocomposites with antibiofilm properties or 2) be used to coat existing surfaces (e...
November 16, 2016: Journal of Dental Research
https://www.readbyqxmd.com/read/27848100/stress-distribution-difference-between-lava-ultimate-full-crowns-and-ips-e-max-cad-full-crowns-on-a-natural-tooth-and-on-tooth-shaped-implant-abutments
#18
Ivo Krejci, René Daher
The goal of this short communication is to present finite element analysis comparison of the stress distribution between CAD/CAM full crowns made of Lava Ultimate and of IPS e.max CAD, adhesively luted to natural teeth and to implant abutments with the shape of natural teeth. Six 3D models were prepared using a 3D content-creating software, based on a micro-CT scan of a human mandibular molar. The geometry of the full crown and of the abutment was the same for all models representing Lava Ultimate full crowns (L) and IPS e...
November 15, 2016: Odontology
https://www.readbyqxmd.com/read/27848099/dental-pulp-tissue-engineering-of-pulpotomized-rat-molars-with-bone-marrow-mesenchymal-stem-cells
#19
Takafumi Ito, Tomoatsu Kaneko, Yukiko Sueyama, Reika Kaneko, Takashi Okiji
The major goal of dental pulp tissue engineering is to enable the healing of inflamed tissue or to replace necrotic pulp tissue with newly formed dental pulp tissue. Here, we report a protocol for pulp tissue engineering in vivo in pulpotomized rat teeth using constructs of rat bone marrow mesenchymal stem cells, preformed biodegradable scaffolds, and hydrogel. The constructs were implanted into pulpotomized pulp chambers for 3, 7, or 14 days. At 3 days, cells were located mainly along the preformed scaffolds...
November 15, 2016: Odontology
https://www.readbyqxmd.com/read/27843652/implant-retained-obturator-for-an-edentulous-patient-with-a-hemimaxillectomy-defect-complicated-with-microstomia
#20
Pravinkumar G Patil, Smita Nimbalkar-Patil
Patient. A 68-year-old man was operated on for squamous cell carcinoma (T3N3M0) of the maxilla creating the hemimaxillary surgical defect on right side. The remaining arch was completely edentulous. There was remarkable limitation in the oral opening with reduced perimeter of the oral cavity due to radiation and surgical scar contracture. This article describes prosthetic rehabilitation by modifying the design of the obturator and achieving the retention with dental implant. Discussion. Severe limitation in the oral opening may occur in clinical situations following the postsurgical management of oral and maxillofacial defects...
2016: Case Reports in Dentistry
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