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Journal of Prosthodontic Research

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https://www.readbyqxmd.com/read/28633987/a-paradigm-shift-for-bone-quality-in-dentistry-a-literature-review
#1
REVIEW
Shinichiro Kuroshima, Masaru Kaku, Takuya Ishimoto, Muneteru Sasaki, Takayoshi Nakano, Takashi Sawase
PURPOSE: The aim of this study was to present the current concept of bone quality based on the proposal by the National Institutes of Health (NIH) and some of the cellular and molecular factors that affect bone quality. STUDY SELECTION: This is a literature review which focuses on collagen, biological apatite (BAp), and bone cells such as osteoblasts and osteocytes. RESULTS: In dentistry, the term "bone quality" has long been considered to be synonymous with bone mineral density (BMD) based on radiographic and sensible evaluations...
June 17, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28625665/color-stability-of-glass-fiber-reinforced-polypropylene-for-non-metal-clasp-dentures
#2
Manamu Nagakura, Yasuhiro Tanimoto, Norihiro Nishiyama
PURPOSE: The purpose of this study was to investigate the color stability of a glass-fiber-reinforced thermoplastic (GFRTP), for use in non-metal clasp dentures (NMCDs). METHODS: GFRTPs composed of E-glass fibers and polypropylene with 2 mass% of pigments were fabricated using injection molding. According to our previous study on the optimum fiber content for GFRTPs, we prepared GFRTPs with fiber contents of 0, 10, and 20 mass% (GF0, GF10, and GF20). Commercially available NMCD and PMMA materials were used as controls...
June 15, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28625664/effects-of-different-numbers-of-mini-dental-implants-on-alveolar-ridge-strain-distribution-under-mandibular-implant-retained-overdentures
#3
Pongsakorn Warin, Pimduen Rungsiyakull, Chaiy Rungsiyakull, Pathawee Khongkhunthian
PURPOSE: To investigate the strains around mini-dental implants (MDIs) and retromolar edentulous areas when using different numbers of MDIs in order to retain mandibular overdentures. MATERIALS AND METHODS: Four different prosthetic situations were fabricated on an edentulous mandibular model including a complete denture (CD), and three overdentures, retained by four, three or two MDIs in the interforaminal region with retentive attachments. A static load of 200N was applied on the posterior teeth of the dentures under bilateral or unilateral loading conditions...
June 15, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28625663/development-of-complete-dentures-based-on-digital-intraoral-impressions-case-report
#4
Jing-Huan Fang, Xueyin An, Seung-Mi Jeong, Byung-Ho Choi
PATIENT: A 60-year-old man presented for refabrication of his maxillary complete denture. In this case, a digital process was chosen to replace the ill-fitted complete maxillary denture. A specialized scan retractor was used to retract the mobile tissues of the lips, cheeks and vestibule while taking a digital impression. The interocclusal record obtained in the patient's mouth was scanned in order to digitally register the occlusal vertical dimension. The denture base and teeth were designed on virtual models that were mounted at the occlusal vertical dimension, and were made using CAD/CAM technology...
June 15, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28606421/spontaneous-jaw-muscle-activity-in-patients-with-acquired-brain-injuries-preliminary-findings
#5
Mohit Kothari, Vibeke Louise Funch Madsen, Eduardo E Castrillon, Jørgen Feldbæk Nielsen, Peter Svensson
PATIENTS: High or excessive parafunctional jaw muscle activity is a frequent complication of acquired brain injury (ABI) and may have some similarities to bruxism. Bruxism has been associated with increased tooth wear, masseter hypertrophy and headaches. The aim of this observational study was to identify the levels of jaw muscle activity from fourteen ABI patients having different functional and cognitive levels in their early phase of neurological rehabilitation (according to their Ranchos Los Amigos Scale (RLAS) score)...
June 9, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28606420/pressure-transmission-area-and-maximum-pressure-transmission-of-different-thermoplastic-resin-denture-base-materials-under-impact-load
#6
Hubban Nasution, Krid Kamonkhantikul, Mansuang Arksornnukit, Hidekazu Takahashi
PURPOSES: The purposes of the present study were to examine the pressure transmission area and maximum pressure transmission of thermoplastic resin denture base materials under an impact load, and to evaluate the modulus of elasticity and nanohardness of thermoplastic resin denture base. METHODS: Three injection-molded thermoplastic resin denture base materials [polycarbonate (Basis PC), ethylene propylene (Duraflex), and polyamide (Valplast)] and one conventional heat-polymerized acrylic resin (PMMA, SR Triplex Hot) denture base, all with a mandibular first molar acrylic resin denture tooth set in were evaluated (n=6)...
June 9, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/28566138/a-newly-developed-ultraminiature-wearable-electromyogram-system-useful-for-analyses-of-masseteric-activity-during-the-whole-day
#7
Taihiko Yamaguchi, Saki Mikami, Miku Saito, Kazuki Okada, Akihito Gotouda
PURPOSE: We describe the characteristics of a new data-logger-type ultraminiature electromyogram (EMG) system (FLA-500-SD) and methods used for recording and we show its potential in clinical applications by presenting an example of a clinical case. METHOD: FLA contains electrodes, an amplifier, 12-bit analog-to-digital (A/D) converter at a sampling frequency of 1kHz, 16-bit CPU, a 3.7-V coin-shaped lithium battery, and a micro SD card. The size of FLA is 37.0×23...
May 26, 2017: Journal of Prosthodontic Research
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
#8
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/28417880/the-japan-prosthodontic-society-is-establishing-the-journal-of-prosthodontic-research-jpr-best-paper-award
#9
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
#10
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/28359872/microbial-colonization-at-the-implant-abutment-interface-and-its-possible-influence-on-periimplantitis-a-systematic-review-and-meta-analysis
#11
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
#12
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
#13
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
#14
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/28237699/effect-of-the-bitterness-of-food-on-muscular-activity-and-masticatory-movement
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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