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Journal of Prosthodontic Research

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https://www.readbyqxmd.com/read/28427837/in-vitro-fatigue-tests-and-in-silico-finite-element-analysis-of-dental-implants-with-different-fixture-abutment-joint-types-using-computer-aided-design-models
#1
Satoshi Yamaguchi, Yasufumi Yamanishi, Lucas S Machado, Shuji Matsumoto, Nick Tovar, Paulo G Coelho, Van P Thompson, Satoshi Imazato
PURPOSE: The aim of this study was to evaluate fatigue resistance of dental fixtures with two different fixture-abutment connections by in vitro fatigue testing and in silico three-dimensional finite element analysis (3D FEA) using original computer-aided design (CAD) models. METHODS: Dental implant fixtures with external connection (EX) or internal connection (IN) abutments were fabricated from original CAD models using grade IV titanium and step-stress accelerated life testing was performed...
April 17, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28359872/microbial-colonization-at-the-implant-abutment-interface-and-its-possible-influence-on-periimplantitis-a-systematic-review-and-meta-analysis
#2
REVIEW
Marco Tallarico, Luigi Canullo, Martina Caneva, Mutlu Özcan
PURPOSE: The aim of this systematic review and meta-analysis was to evaluate the microbial colonization at the implant-abutment interfaces (IAI) on bone-level implants and to identify possible association with peri-implant conditions. STUDY SELECTION: The focus question aimed to answer whether two-piece osseointegrated implants, in function for at least 1 year, in human, relate to higher bacterial count and the onset of periimplantitis, compared to healthy peri-implant conditions...
March 27, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28359871/evaluation-of-functional-parameters-in-the-occlusion-of-complete-denture-wearers-before-and-after-prosthetic-treatment
#3
Kuć Joanna, Sierpińska Teresa, Gołębiewska Maria
PURPOSE: The aim of the study was to evaluate functional parameters of the occlusion in complete denture wearers before and after prosthetic treatment. METHODS: The sample used as the basis for the present study consisted of 50 healthy Caucasian patients (35 women and 15 men), aged from 44 to 86 years (mean=69.18±10), with a total deficiency of teeth. All patients received new complete dentures. Each patient underwent lateral radiograph with the presence of complete dentures, both before (initially existing dentures) and after the prosthetic treatment (new restorations)...
March 27, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28343924/properties-of-discontinuous-s2-glass-fiber-particulate-reinforced-resin-composites-with-two-different-fiber-length-distributions
#4
Qiting Huang, Sufyan Garoushi, Zhengmei Lin, Jingwei He, Wei Qin, Fang Liu, Pekka Kalevi Vallittu, Lippo Veli Juhana Lassila
PURPOSE: To investigate the reinforcing efficiency and light curing properties of discontinuous S2-glass fiber-particulate reinforced resin composite and to examine length distribution of discontinuous S2-glass fibers after a mixing process into resin composite. METHODS: Experimental S2-glass fiber-particulate reinforced resin composites were prepared by mixing 10wt% of discontinuous S2-glass fibers, which had been manually cut into two different lengths (1.5 and 3...
March 23, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28279651/fracture-resistance-of-endodontically-treated-teeth-restored-with-short-fiber-composite-used-as-a-core-material-an-in-vitro-study
#5
Tejesh Gupta Garlapati, Jogikalmat Krithikadatta, Velmurugan Natanasabapathy
PURPOSE: This in-vitro study tested the fracture resistance of endodontically treated molars with Mesial-Occluso-Distal (MOD) cavities restored with fibre reinforced composite material everX posterior in comparision with hybrid composite and ribbond fiber composite. MATERIALS AND METHODS: Fifty intact freshly extracted human mandibular first molars were collected and were randomly divided into five groups (n=10). Group 1: positive control (PC) intact teeth without any endodontic preparation...
March 6, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28417880/the-japan-prosthodontic-society-is-establishing-the-journal-of-prosthodontic-research-jpr-best-paper-award
#6
EDITORIAL
Ryuji Hosokawa
No abstract text is available yet for this article.
April 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/27324294/a-new-occlusal-surface-design-for-artificial-posterior-teeth-to-achieve-high-masticatory-performance
#7
Yuki Hashimoto, Kyoko Sugimoto, Yuki Tanaka, Kazuhiro Oki, Shogo Minagi
PURPOSE: The low masticatory efficiency of denture prostheses impairs the ability of wearers to consume high-fiber foods. Hence, artificial teeth with high masticatory efficiency are required. This study aimed to establish an occlusal surface design for posterior artificial teeth in denture prostheses that is compatible with the existing artificial teeth arrangement and that has high masticatory efficiency for the comminution of raw vegetables. METHODS: A masticatory simulator for occluding complete dentures was used to evaluate the masticatory efficiency of four occlusal surface designs, i...
April 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28237699/effect-of-the-bitterness-of-food-on-muscular-activity-and-masticatory-movement
#8
Yamato Okada, Hiroshi Shiga
PURPOSE: The purpose of this study was to clarify the effect of the bitterness of food on muscular activity and masticatory movement. METHODS: Twenty healthy subjects were asked to chew a non-bitter gummy jelly and a bitter gummy jelly on their habitual chewing side. The masseter muscular activity and the movement of mandibular incisal point were recorded simultaneously. For all cycles excluding the first cycle, parameters representing the muscular activity (total integral value and integral value per cycle) and masticatory movement (path, rhythm, and stability) were calculated and compared between the two types of gummy jellies...
February 22, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28237698/relationship-between-masticatory-performance-using-a-gummy-jelly-and-masticatory-movement
#9
Hanako Uesugi, Hiroshi Shiga
PURPOSE: The purpose of this study was to clarify the relationship between masticatory performance using a gummy jelly and masticatory movement. METHODS: Thirty healthy males were asked to chew a gummy jelly on their habitual chewing side for 20s, and the parameters of masticatory performance and masticatory movement were calculated as follows. For evaluating the masticatory performance, the amount of glucose extraction during chewing of a gummy jelly was measured...
February 22, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28233692/effect-of-palatal-augmentation-prosthesis-on-pharyngeal-manometric-pressure-in-a-patient-with-functional-dysphagia-a-case-report
#10
Tomohisa Ohno, Ryo Ohno, Ichiro Fujishima
PATIENTS: A 53-year-old institutionalized male patient with a history of postoperative bilateral hypoglossal nerve injury was admitted for treatment of dysphagia. He experienced dysphagia involving oral cavity-to-pharynx bolus transportation because of restricted tongue movement and was treated with a palatal augmentation prosthesis (PAP), which resulted in improved bolus transportation, pharyngeal swallowing pressure, and clearance of oral and pharyngeal residue. The mean pharyngeal swallowing pressure at tongue base with the PAP (145...
February 20, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28223139/the-role-of-il-1-gene-polymorphisms-il1a-il1b-and-il1rn-as-a-risk-factor-in-unsuccessful-implants-retaining-overdentures
#11
Margarida Sampaio Fernandes, Paula Vaz, Ana Cristina Braga, João Carlos Sampaio Fernandes, Maria Helena Figueiral
PURPOSE: Implant-supported overdentures are an alternative predictable rehabilitation method that has a high impact on improving the patient's quality of life. However, some biological complications may interfere with the maintenance and survival of these overdenture implants. The goal of this article was to assess the factors that affect peri-implant success, through a hypothetical prediction model for biological complications of implant overdentures. METHODS: A retrospective observational, prevalence study was conducted in 58 edentulous Caucasian patients rehabilitated with implant overdentures...
February 17, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28216020/investigation-of-accuracy-and-reproducibility-of-abutment-position-by-intraoral-scanners
#12
Shota Fukazawa, Chikayuki Odaira, Hisatomo Kondo
PURPOSE: We examined the accuracy, including trueness and precision, of the intraoral scanners comparing with laboratory scanner to reveal the error level of intraoral scanners. METHODS: Measurements were performed using a computer numerical control coordinate measuring machine (CNCCMM) of the reference models as a control. Subsequently, intraoral scanners and a laboratory scanner were used for measurements of the reference trueness and precision of the distance were evaluated by image analyzing software...
February 16, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28188110/accuracy-and-mechanical-performance-of-passivated-and-conventional-fabricated-3-unit-fixed-dental-prosthesis-on-multi-unit-abutments
#13
Michael Stimmelmayr, Julian Groesser, Florian Beuer, Kurt Erdelt, Gerald Krennmair, Caroline Sachs, Daniel Edelhoff, Jan-Frederik Güth
PURPOSE: The aim of this study was to evaluate the fit and mechanical stability of conventional versus passive fitting 3-unit fixed dental prosthesis (FDP) screw-retained on implants. METHODS: Twenty acrylic models, each with two embedded implants, were fabricated and functioned as patient-models. Impressions were taken and 20 all-ceramic FDPs were pre-fabricated on the plaster casts. Respectively 10 FDPs were fixed on the plaster casts (group 1) and on the patient-models for passive fitting (group 2)...
February 7, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28188109/quantitative-evaluation-of-masseter-muscle-stiffness-in-patients-with-temporomandibular-disorders-using-shear-wave-elastography
#14
Makiko Takashima, Yoshiaki Arai, Atsushi Kawamura, Takafumi Hayashi, Ritsuo Takagi
PURPOSE: The aim of this study was to quantify masseter muscle stiffness in patients with masticatory myofascial pain. METHODS: Stiffness was measured using shear wave elastography, which expresses stiffness as shear wave velocity (Vs). A phantom study was conducted to confirm the reliability of the measuring device. The study participants were 26 females with bilateral masseter muscle pain who were classified into either Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) group Ia (myofascial pain; n=13) or RDC/TMD group Ib (myofascial pain with limited opening; n=13)...
February 7, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28126244/association-between-chewing-stimulated-salivary-flow-under-the-effects-of-atropine-and-mixing-ability-assessed-using-a-color-changeable-chewing-gum
#15
Chieko Kubota, Manabu Kanazawa, Yohei Hama, Yuriko Komagamine, Shunsuke Minakuchi
PURPOSE: To assess the time course of chewing-stimulated salivary flow after oral atropine administration, and determine the association between chewing-stimulated salivary flow and mixing ability using color-changeable chewing gum in dentate adults. METHODS: Ten healthy dentate adults were administered 1mg oral atropine to induce mouth dryness. The subjects' chewing-stimulated salivary flow was assessed using the Saxon test. They were then asked to rinse their mouth with tap water for 15s, and to chew on color-changeable chewing gum for 60s at a constant rate of 60 cycles per min...
January 23, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28126243/the-effect-of-curing-conditions-on-the-dentin-bond-strength-of-two-dual-cure-resin-cements
#16
Atsuko Tagami, Rena Takahashi, Toru Nikaido, Junji Tagami
PURPOSE: The purpose of this study was to determine the effect of the curing condition (i.e., the curing mode and restoration thickness) on the tensile bond strength of a dual-cure resin cement applied to dentin. METHODS: Indirect composite resin disks (1, 2, and 3mm in thickness) were prepared. The irradiance of a halogen light curing unit through each disk was measured by a curing radiometer. A measurement was also taken for the condition with no disk. Following this, two dual-cure resin cements, Panavia F2...
January 23, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28111135/fracture-resistance-of-glazed-full-contour-zls-incisor-crowns
#17
Franz Sebastian Schwindling, Stefan Rues, Marc Schmitter
PURPOSE: To compare the failure behaviour of zirconia-reinforced lithium silicate (Celtra Duo, DeguDent) with that of lithium disilicate (IPS e.max CAD, Ivoclar Vivadent) and feldspar (Mark II, VITA) ceramics. METHODS: Three groups of sixteen glazed maxillary incisor crowns were produced. The inner surfaces of the crowns were etched, then luted to metal dies with self-adhesive cement. Single load-to-failure tests were performed before and after thermo-mechanical ageing...
January 19, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28109797/evaluation-of-sleep-bruxism-with-a-novel-designed-occlusal-splint
#18
Kentaro Hirai, Tomoko Ikawa, Yuko Shigeta, Shuji Shigemoto, Takumi Ogawa
PURPOSE: This report presents our evaluation system that assesses sleep bruxism. The characteristics and fabrication process of our novel designed splint, and the analysis process of our system are presented. METHODS: The subjects were 17 volunteers. The splint was fabricated with a self-curing resin compounded with an amino-acid powder for easy wear on the semi-adjustable articulator, and adjusted for a full-balanced occlusion. An impression of the splint, located on the cast, was taken before and after it was worn...
January 18, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28109796/minimization-of-dental-implant-diameter-and-length-according-to-bone-quality-determined-by-finite-element-analysis-and-optimized-calculation
#19
Nana Ueda, Yoshiyuki Takayama, Atsuro Yokoyama
PURPOSE: The purpose of this study was to investigate the influences of bone quality and implant size on the maximum equivalent elastic strain (MES) in peri-implant bone using finite element (FE) analysis, and to minimize implant size via optimized calculation based on MES. METHODS: Three-dimensional FE models consisting of a mandible and a titanium implant with a superstructure were constructed and applied a vertical load or an oblique load of 60N. We investigated the effects of four variables: the thickness of the cortical bone (C), Young's modulus of the trabecular bone (T), and the diameter (D) and length (L) of the implant...
January 18, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28109795/bone-morphological-effects-on-post-implantation-remodeling-of-maxillary-anterior-buccal-bone-a-clinical-and-biomechanical-study
#20
Nobuhiro Yoda, Keke Zheng, Junning Chen, Wei Li, Michael Swain, Keiichi Sasaki, Qing Li
PURPOSE: This study combines clinical investigation with finite element (FE) analysis to explore the effects of buccal bone thickness (BBT) on the morphological changes of buccal bone induced by the loaded implant. METHODS: One specific patient who had undergone an implant treatment in the anterior maxilla and experienced the buccal bone resorption on the implant was studied. Morphological changes of the bone were measured through a series of cone-beam computed tomography (CT) scans...
January 18, 2017: Journal of Prosthodontic Research
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