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Implant connection

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https://www.readbyqxmd.com/read/28742164/relationship-between-implant-stability-on-the-abutment-and-platform-level-by-means-of-resonance-frequency-analysis-a-cross-sectional-study
#1
Frederico Santos Lages, Dhelfeson Willya Douglas-de-Oliveira, Guilherme Siqueira Ibelli, Fatimah Assaf, Thallita Pereira Queiroz, Fernando Oliveira Costa
Resonance frequency analysis (RFA) has become the main tool used to assess the osseointegration of dental implants. The objective of this study was to verify the relationship between the ISQ values with different prosthetic abutments and with the implant platform. The hypothesis was that ISQ values changes according to the abutment height. Twelve patients were included, whose contribution to the study was 31 dental implants (external hexagon connection implants, 4.1x10 mm). The temporary implant-supported crown and prosthetic components were removed and the following smartpegs were inserted, one at a time: type 1, in the implant platform (G1); type A3, in the microunit component with 1mm transmucosal height (G2) and type A3, in the microunit component with 5mm transmucosal height (G3)...
2017: PloS One
https://www.readbyqxmd.com/read/28741725/cell-derived-micro-environment-helps-dental-pulp-stem-cells-promote-dental-pulp-regeneration
#2
Xuexin Zhang, Hui Li, Jingjing Sun, Xiangyou Luo, Hefeng Yang, Li Xie, Bo Yang, Weihua Guo, Weidong Tian
OBJECTIVES: The function of the dental pulp is closely connected to the extracellular matrix (ECM) structure, and ECM has received significant attention due to its biological functions for regulating cells. As such, the interaction between the ECM niche and cells is worth exploring for potential clinical uses. MATERIALS AND METHODS: In this study, dental pulp stem cell (DPSC)-derived ECM (DPM) was prepared through cell culture and decellularization to function as the cell niche, and changes in DPSC behaviour and histological analysis of dental pulp tissue regeneration were evaluated following the DPM culture...
July 25, 2017: Cell Proliferation
https://www.readbyqxmd.com/read/28741276/the-use-of-a-biphasic-calcium-phosphate-in-a-maxillary-sinus-floor-elevation-procedure-a-clinical-radiological-histological-and-histomorphometric-evaluation-with-9-and-12-month-healing-times
#3
W F Bouwman, N Bravenboer, J W F H Frenken, C M Ten Bruggenkate, E A J M Schulten
BACKGROUND: This study evaluates the clinical, radiological, histological, and histomorphometric aspects of a fully synthetic biphasic calcium phosphate (BCP) (60% hydroxyapatite and 40% ß-tricalcium phosphate), used in a human maxillary sinus floor elevation (MSFE) procedure with 9- and 12-month healing time. METHODS: A unilateral MSFE procedure, using 100% BCP, was performed in two series of five patients with healing times of 9 and 12 months respectively. Clinical and radiological parameters were measured up to 5 years postoperatively...
December 2017: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/28739610/silicone-implant-incompatibility-syndrome-siis-in-a-57-year-old-woman-with-unilateral-silicone-breast-implant
#4
Juliane Schierbeck, Jesper Rømhild Davidsen, Sanne Grindsted Nielsen, Camilla Bille
Since the 1960s, silicone implants have been used for breast augmentations, both cosmetically and in reconstructive surgery. Tissue exposed to silicone can react with multiple adverse advents. Autoimmune/inflammatory syndrome induced by adjuvants due to silicone exposure from ruptured silicone implants can lead to different interstitial lung manifestations predominantly with granuloma evolvement, leading to the so-called silicone implant incompatibility syndrome (SIIS). This case describes a 57-year-old woman with multiple lung infiltrations and a left-sided breast implant...
July 24, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28739320/immediate-implant-placement-into-posterior-sockets-with-or-without-buccal-bone-dehiscence-defects-a-retrospective-cohort-study
#5
Chen Hu, Ting Gong, Weimin Lin, Quan Yuan, Yi Man
OBJECTIVES: To evaluate bone reconstruction and soft tissue reactions at immediate implants placed into intact sockets and those with buccal bone dehiscence defects. METHODS: Fifty-nine internal connection implants from four different manufacturers were immediately placed in intact sockets(non-dehiscence group, n=40), and in alveoli with buccal bone dehiscence defects: 1) Group 1(n= N10), the defect depth measured 3-5 mm from the gingival margin. 2) Group 2(n=9), the depth ranged from 5mm to 7mm...
July 21, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28736922/effect-of-implantoplasty-on-fracture-resistance-and-surface-roughness-of-standard-diameter-dental-implants
#6
Xavier Costa-Berenguer, Marta García-García, Alba Sánchez-Torres, Mariano Sanz-Alonso, Rui Figueiredo, Eduard Valmaseda-Castellón
OBJECTIVE: To assess the effect of implantoplasty on the fracture resistance, surface roughness, and macroscopic morphology of standard diameter (4.1 mm) external connection dental implants. MATERIALS AND METHODS: An in vitro study was conducted in 20 screw-shaped titanium dental implants with an external connection. In 10 implants, the threads and surface were removed and polished with high-speed burs (implantoplasty), while the remaining 10 implants were used as controls...
July 23, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/28735624/the-effect-of-prostaglandin-e2-receptor-ptger2-activation-on-growth-factor-expression-and-cell-proliferation-in-bovine-endometrial-explants
#7
Shuangyi Zhang, Bo Liu, Wei Mao, Qianru Li, Changqi Fu, Nan Zhang, Ying Zhang, Long Gao, Yuan Shen, Jinshan Cao
The domestic animal endometrium undergoes regular periods of regeneration and degeneration during cycles of oestrus and dioestrus. If blastocyst implantation occurs in the uterus, the endometrium will prepare for pregnancy by changing its pattern of development to build a connection with the embryo to nourish it. Prostaglandin E2 (PGE2) secretion synchronized with endometrial growth in these processes and could be involved in endometrial growth. One of the PGE2 receptors (PTGER2) is present in endometrium and its increased expression accompanies with endometrial growth in above processes...
July 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28734346/hap-nanoparticle-and-substrate-surface-electrical-potential-towards-bone-cells-adhesion-recent-results-review
#8
REVIEW
Vladimir Bystrov, Anna Bystrova, Yuri Dekhtyar
Nanostructured hydroxyapatite (HAP) and its nanoparticles are widely used for implantation into the human organism. The biocompatibility of the implants depends very much on the interaction between the implant and the cells regenerating tissue to be connected to the implant. An implant surface electrical charged density plays an important role in these processes. Possible instruments managing the surface electrical potential of HAP are in the focus of this paper. Both theoretical and experimental results evidence that: - the surface electrical charge density of the nanoparticle depends on its size and shape; - the electrical charge density of HAP could be engineered by contact less technique because of deposition of the electrical charge from the external radiation source, surface couples reconstruction...
May 3, 2017: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/28721551/peri-implant-biomechanical-responses-to-standard-short-wide-and-double-mini-implants-replacing-missing-molar-supporting-hybrid-ceramic-or-full-metal-crowns-under-axial-and-off-axial-loading-an-in-vitro-study
#9
Lamiaa Said Elfadaly, Lamiaa Sayed Khairallah, Mona Atteya Al Agroudy
BACKGROUND: The aim of this study was to evaluate the biomechanical response of the peri-implant bone to standard, short-wide, and double mini implants replacing missing molar supporting either hybrid ceramic crowns (Lava Ultimate restorative) or full-metal crowns under two different loading conditions (axial and off-axial loading) using strain gauge analysis. METHODS: Three single-molar implant designs, (1) single, 3.8-mm (regular) diameter implant, (2) single, 5...
December 2017: International Journal of Implant Dentistry
https://www.readbyqxmd.com/read/28720378/a-novel-technique-carbon-dioxide-gas-assisted-total-peritonectomy-diaphragm-and-intestinal-meso-stripping-in-open-surgery-for-advanced-ovarian-cancer-%C3%A3-ukurova-technique
#10
Ghanim Khatib, Ahmet Baris Guzel, Umran Kucukgoz Gulec, Mehmet Ali Vardar
OBJECTIVE: Most of the ovarian cancers are diagnosed at advanced stages. As peritoneal carcinomatosis increases, especially when it extends to the diaphragm and intestinal mesos, probability of obtaining complete cytoreduction is reduced. Complete cytoreduction (residue zero: R0) is one of the main factors affecting survival [1-3]. Here we present a novel technique of stripping the peritoneal surfaces as a part of cytoreductive surgery in such cases. METHODS: A 55year-old woman diagnosed with peritoneal carcinomatosis was considered appropriate for primary cytoreduction after assessment of her thorax-abdominopelvic tomography, which revealed resectable intra-abdominal disease...
July 15, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28719054/evolutionary-cell-biology-of-proteins-from-protists-to-humans-and-plants
#11
REVIEW
Helmut Plattner
During evolution, the cell as a fine-tuned machine had to undergo permanent adjustments to match changes in its environment, while "closed for repair work" was not possible. Evolution from protists (protozoa and unicellular algae) to multicellular organisms may have occurred in basically two lineages, Unikonta and Bikonta, culminating in mammals and angiosperms (flowering plants), respectively. Unicellular models for unikont evolution are myxamoebae (Dictyostelium) and increasingly also choanoflagellates, whereas, for bikonts, ciliates are preferred models...
July 18, 2017: Journal of Eukaryotic Microbiology
https://www.readbyqxmd.com/read/28713730/application-of-orthodontic-immediate-force-on-dental-implants-histomorphologic-and-histomorphometric-assessment
#12
Mansour Rismanchian, Sayed Hamid Raji, Sayed Mohammad Razavi, Danesh Teimouri Rick, Amin Davoudi
AIMS: Application of force to implants is helpful, especially in orthodontic-implant therapies. The aim of this study was a histomorphologic and histomorphometric evaluation of peri-implant bone after immediate orthodontic and orthopedic forces comparing them with a control group. MATERIALS AND METHODS: Eighteen dental titanium implants were inserted in the premolar region of three dogs. Implants were divided into three groups: (1) group with immediate orthodontic force of 300 NC, (2) group with immediate orthopedic force of 600 NC, and (3) control group...
January 2017: Annals of Maxillofacial Surgery
https://www.readbyqxmd.com/read/28713600/periodontics-implantology-and-prosthodontics-integrated-the-zenith-driven-rehabilitation
#13
Fausto Frizzera, Mateus Tonetto, Guilherme Cabral, Jamil Awad Shibli, Elcio Marcantonio
A customized treatment plan is important to reach results that will satisfy the patient providing esthetics, function, and long-term stability. This type of oral rehabilitation requires professionals from different dental specialties where communication is a major key point. Digital Smile Design allows the practitioners to plan and discuss the patient's condition to establish the proper treatment plan, which must be driven by the desired zenith position. The ideal gingival position will guide the professionals and determine the need to perform surgical procedures or orthodontic movement before placing the final restorations...
2017: Case Reports in Dentistry
https://www.readbyqxmd.com/read/28713235/connecting-the-brain-to-itself-through-an-emulation
#14
Mijail D Serruya
Pilot clinical trials of human patients implanted with devices that can chronically record and stimulate ensembles of hundreds to thousands of individual neurons offer the possibility of expanding the substrate of cognition. Parallel trains of firing rate activity can be delivered in real-time to an array of intermediate external modules that in turn can trigger parallel trains of stimulation back into the brain. These modules may be built in software, VLSI firmware, or biological tissue as in vitro culture preparations or in vivo ectopic construct organoids...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28712018/laparoscopic-implantation-of-electrodes-for-bilateral-neuromodulation-of-the-pudendal-nerves-and-s3-nerve-roots-for-treating-pelvic-pain-and-voiding-dysfunction
#15
Adrienne L K Li, Renato Marques, Acary Oliveira, Laise Veloso, Manoel J B C Girão, Nucelio Lemos
INTRODUCTION AND HYPOTHESIS: The objective of this video is to describe the technique for laparoscopic implantation of electrodes for bilateral neuromodulation of S3 and pudendal nerves. We report a successful case of a 48-year-old woman with spina bifida occulta referred with a 14-year history of intense acyclic pelvic pain, urinary hesitancy, and intermittent flow refractory to various conservative measures. METHODS: The procedure began with the removal of two previously placed InterStims...
July 15, 2017: International Urogynecology Journal
https://www.readbyqxmd.com/read/28709675/a-digital-technique-for-fabricating-implant-supported-interim-restorations-in-the-esthetic-zone
#16
Xiaoqiang Liu, Yao Tan, Jianzhang Liu, Jianguo Tan
A digital technique for fabricating an implant-supported interim restoration is presented. The labial cervical architecture of the natural tooth is captured before extraction and registered to form the emergence profile of the interim restoration. A well-contoured interim restoration is fabricated before surgery and connected to the immediately placed implant with a customized interim abutment.
July 11, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28708914/misfit-of-three-different-implant-abutment-connections-before-and-after-cyclic-load-application-an-in-vitro-study
#17
Sergio Alexandre Gehrke, Rafael Arcesio Delgado-Ruiz, Juan Carlos Prados Frutos, María Prados-Privado, Berenice Anina Dedavid, Jose Manuel Granero Marín, José Luiz Calvo Guirado
PURPOSE: This study aimed to evaluate the misfit of three different implant-abutment connections before and after cycling load. MATERIALS AND METHODS: One hundred twenty dental implants and correspondent prefabricated titanium abutments were used. Three different implant-abutment connections were evaluated: Morse taper (MT group), external hexagon (EH group), and internal hexagon (IH group). Forty implants and 40 abutments were used per group. The parameters for the mechanical evaluation were set as: 360,000 cycles, load of 150 N, and frequency of 4 Hz...
July 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28708909/biomechanical-three-dimensional-finite-element-analysis-of-single-implant-supported-prostheses-in-the-anterior-maxilla-with-different-surgical-techniques-and-implant-types
#18
Fellippo Ramos Verri, Joel Ferreira Santiago, Daniel Augusto Almeida, Victor Eduardo de Souza Batista, Cleidiel Aparecido Araujo Lemos, Caroline Cantieri Mello, Eduardo Piza Pellizzer
PURPOSE: The aim of this study was to use three-dimensional finite element analysis to analyze the stress distribution transferred by single implant-supported prostheses placed in the anterior maxilla using different connections (external hexagon, internal hexagon, or Morse taper), inclinations of the load (0, 30, or 60 degrees), and surgical techniques for placement (monocortical/conventional, bicortical, or bicortical with nasal floor elevation). MATERIALS AND METHODS: Nine models representing a bone block of this region were simulated by computer-aided design software (InVesalius, Rhinoceros, SolidWorks)...
July 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28708038/influence-of-implant-neck-surface-and-placement-depth-on-crestal-bone-changes-around-platform-switched-implants-a-clinical-and-radiographic-study-in-dogs
#19
Cristina Valles, Xavier Rodríguez-Ciurana, Jose Nart, Antonio Santos, Marta Galofre, Dennis Tarnow
OBJECTIVES: The aim of this animal study was to analyze bone remodeling around platform-switching (PS) implants with and without a machined collar placed at different levels in relation to crestal bone in a canine model. MATERIAL AND METHODS: All mandibular premolars and the first molars were extracted in five dogs. At 6 months, six PS implants with and without a machined neck (MACH and GBAE implants, respectively) were randomly inserted in each hemimandible positioning the implant-abutment interface in either a supracrestal (+1...
July 14, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28701801/adipose-tissue-formation-utilizing-fat-flap-distraction-technique
#20
Myung Chul Lee, Won Jai Lee, Byung Il Lee, Kee Yang Chung, Jae Woo Kim, Eun Hye Kang, Yong Oock Kim
Co-regulation between adipocytes and supporting vasculature is considered an important process in adipose tissue generation. The objective of this study was to evaluate the mechanical and biological effects of a distraction technique on adipose tissue formation and maintenance. Based on the hypothesis that fat flaps gradually receding from each other can develop an adipose tissue construct, perforated polycarbonate syringe-shaped chambers were implanted in a rabbit model. Latency (1 week) and distraction (3 weeks) periods were followed by a consolidation period in the experimental groups (4, 8, and 12 weeks)...
July 12, 2017: Scientific Reports
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