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https://www.readbyqxmd.com/read/28319216/influence-of-implant-number-and-location-on-strain-around-an-implant-combined-with-force-transferred-to-the-palate-in-maxillary-overdentures
#1
Tsung-Chieh Yang, Yi-Chen Chen, Tong-Mei Wang, Li-Deh Lin
This study evaluated the effect of implant number and location on strain around the implant and force transferred to the palate in maxillary implant overdentures (IODs), including two locators attached bilaterally in the canine region (IOD 2), four locators attached bilaterally in the canine and premolar regions (IOD 4CP), four locators attached bilaterally in the canine and molar regions (IOD 4CM), and six locators attached bilaterally in the canine, premolar, and molar regions (IOD 6). As the implant number increased, strain around the implant regions increased, whereas force transferred to the palate decreased under loading...
March 20, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/28319207/posterior-prosthetic-teeth-size-selection-for-edentulous-egyptian-patients-a-radiographic-assessment
#2
Maha W Elkerdawy, Amr H Elkhadem
PURPOSE: The aim of this study was to correlate the location of the mental foramen and overlying teeth and apply these observations to posterior prosthetic teeth selection in a group of Egyptian edentulous patients. MATERIALS AND METHODS: Retrospective cone beam computed tomography data from 40 dentate and 40 edentulous patients scanned with radiopaque denture duplicates were compared in relation to mental foramen position. RESULTS: The probability of locating the mental foramen opposite the first premolar was higher in dentate patients, while finding it opposite the first molar was higher in edentulous patients...
March 20, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/28318312/evidence-favoring-a-secular-reduction-in-mandibular-leeway-space
#3
Tyler R Allen, Terry M Trojan, Edward F Harris
OBJECTIVE: Researchers have documented secular trends in tooth size among recent generations. This study was a test for a change in mandibular leeway space. MATERIALS AND METHODS: Dental casts from participants in the Denver Growth Study (23 boys, 22 girls; born in the 1930s) were compared with casts from a contemporary series of orthodontic patients (23 boys, 22 girls; born in the 1990s). All were phenotypically normal, healthy American whites. RESULTS: Analysis of variance (accounting for sex) showed that the cumulative mandibular primary canine plus first and second primary molar size (c + m1 + m2) was slightly larger in the recent cohort (23...
March 20, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28317350/-effects-of-dentin-demineralization-and-bond-strength-properties-of-bioactive-glass-containing-resin-adhesive
#4
Wang Yu, Gong Ling, Ji Yan, Zheng Lichun, Chen Song
OBJECTIVE: This study investigated the shear bond strength and the ability of resin adhesive containing different amounts of bioactive glass (BG) to prevent dentin demineralization. METHODS: BG bonds at 30%, 40%, and 50% concentrations comprised a mixture of coupling agents modifying BG and Single Bond 2. Forty permanent premolars extracted for orthodontic treatment were randomly divided into four groups, namely, control group (BG-free), 30% BG group, 40% BG group, and 50% BG group...
August 1, 2016: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28317243/implant-supported-mandibular-removable-partial-dentures-functional-clinical-and-radiographical-parameters-in-relation-to-implant-position
#5
Charlotte Jensen, Caroline M Speksnijder, Gerry M Raghoebar, Wouter Kerdijk, Henny J A Meijer, Marco S Cune
BACKGROUND: Patients with a Kennedy class I situation often encounter problems with their removable partial denture (RPD). PURPOSE: To assess the functional benefits of implant support to RPDs, the clinical performance of the implants and teeth and to determine the most favorable implant position: the premolar (PM) or molar (M) region. MATERIALS AND METHODS: Thirty subjects received 2 PM and 2 M implants. A new RPD was made. Implant support was provided 3 months later...
March 20, 2017: Clinical Implant Dentistry and related Research
https://www.readbyqxmd.com/read/28316920/measurement-of-ph-and-calcium-ions-release-from-different-calcium-hydroxide-pastes-at-different-intervals-of-time-atomic-spectrophotometric-analysis
#6
Pranab Misra, Rhythm Bains, Kapil Loomba, Abhinav Singh, V P Sharma, R C Murthy, Rakesh Kumar
AIM: To evaluate the effect of different vehicles on pH and release of calcium ions from calcium hydroxide (CH) paste from apical third of root canals. METHODS: 40 single rooted extracted human mandibular premolars were instrumented with RevoS files (MicroMega) up to ISO size 40. The teeth were divided into 4 groups on the basis of vehicle as follows: Group I - calcium hydroxide mixed with 2% chlorhexidine; Group II - calcium hydroxide mixed with propylene glycol; Group III - calcium hydroxide mixed with glycerine; and Control - calcium hydroxide mixed with double distilled water...
January 2017: Journal of Oral Biology and Craniofacial Research
https://www.readbyqxmd.com/read/28316283/combination-therapies-for-the-treatment-of-recurrent-central-giant-cell-lesion-in-the-maxilla-a-case-report
#7
Jefferson Paulo de Oliveira, Fernanda Olivete, Naylin Danyele de Oliveira, Allan Fernando Giovanini, João César Zielak, Leandro Klüppel, Rafaela Scariot
BACKGROUND: Central giant cell lesion is a non-neoplastic proliferation, usually asymptomatic, of unknown etiology. The purpose of this case report is to report the diagnosis and the treatment of a recurrent central giant cell lesion in the maxilla. CASE PRESENTATION: A 31-year-old Brazilian woman presented to our Surgery Service for evaluation of a cystic lesion in her teeth 13 and 15, although she had previously received endodontic treatment for her teeth 13 and 15 without regression of the lesion...
March 20, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28303354/odontogenic-orbital-abscess-a-case-report-and-review-of-literature
#8
Pasquale Procacci, Alessandro Zangani, Alberto Rossetto, Alessandro Rizzini, Giovanni Zanette, Massimo Albanese
Odontogenic orbital abscess is a rare but well-documented complication of sinusitis and infections spreading from dental apical lesion. We report a case of orbital abscess with periorbital cellulitis, in a 35-year-old man with positive recent dental history of a periapical dental infection arising from the second upper left premolar spread into maxillary sinus. The patient has shown facial edema, ocular pain, ophthalmoplegia, proptosis, and initial visual symptoms. A surgical intervention to drain the abscess and a revision of the dental lesion and maxillary sinus were required...
March 16, 2017: Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28298991/fracture-resistance-of-endodontically-treated-teeth-with-different-direct-corono-radicular-restoration-methods
#9
Horieh Moosavi, Safora Afshari, Fatemeh Manari
BACKGROUND: Endodontically treated teeth are widely considered to be more susceptible to fracture than vital teeth. Obturation procedures and post placement have been a main cause of vertical root fracture. MATERIAL AND METHODS: Forty-eight human premolars with standardized weakened roots were endodontically treated and allocated to four experimental groups (n=12). After root canal treatment, in group 1, fiber posts #1 were cemented in root canals using Estelite Core Quick, and the crowns were restored with resin composite...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28298987/effect-of-different-concentrations-of-specific-inhibitor-of-matrix-metalloproteinases-on-the-shear-bond-strength-of-self-adhesive-resin-cements-to-dentin
#10
Mohammad-Esmaeel Ebrahimi-Chaharom, Mehdi Abed-Kahnamoui, Mahmoud Bahari, Hamed Hamishehkar, Mahya Gharouni
BACKGROUND: Considering the probability of chemical and enzymatic reactions between matrix metalloproteinases (MMPs) in the dentin structure and their specific inhibitors, the aim of the present study was to evaluate the effect of different concentrations of specific inhibitor of MMPs (galardin) on the shear bond strength of self-adhesive resin cements to dentin. MATERIAL AND METHODS: Forty-eight sound human premolars were mounted in self-cured acrylic resin after removal of the enamel on the buccal and lingual surfaces...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28298970/effect-of-orthodontic-treatment-involving-first-premolar-extractions-on-mandibular-third-molar-angulation-and-retromolar-space
#11
Luz-Victoria Mendoza-García, Esther Vaillard-Jiménez, Araceli García-Rocha, Carlos Bellot-Arcís, Vanessa Paredes-Gallardo
BACKGROUND: Third molars present more problems than other teeth because they are the last teeth to erupt, and so it is important to assess their development when designing an orthodontic treatment plan. The aim of this study was to compare the angulation of the mandibular third molar and retromolar space before and after orthodontic treatment in cases involving first premolar extraction. MATERIAL AND METHODS: 76 patients, 59 women (77.63%) and 17 men (22.36%), were recruited from the Orthodontics Clinic at Benemérita Universidad Autónoma de Puebla (Mexico)...
March 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28294198/external-and-internal-resin-infiltration-of-natural-proximal-subsurface-caries-lesions-a-valuable-enhancement-of-the-internal-tunnel-restoration
#12
Andrej M Kielbassa, Ina Ulrich, Vanessa D Werth, Christoph Schüller, Wilhelm Frank, Rita Schmidl
OBJECTIVE: The aim of this ex-vivo study was to evaluate both the external and the internal penetration ability of a resin infiltrant into natural proximal and macroscopically intact white spot lesions, and to merge this approach with the internal tunnel preparation concept. METHOD AND MATERIALS: 20 premolars and 20 molars with proximal subsurface lesions (ICDAS, code 2) and respective radiographic lesion depths extending into the middle third of dentin (D2 lesions) were selected and divided into two groups...
March 14, 2017: Quintessence International
https://www.readbyqxmd.com/read/28293665/comparison-of-endodontic-medicaments-on-bond-strength-of-fiber-post-to-root-dentin-using-resin-cement
#13
Maryam Zare Jahromi, Mehrdad Barekatain, Shirin Ravanbod, Parisa Ranjbarian, Sara Kousehlar
STATEMENT OF THE PROBLEM: Endodontic irrigants and medicaments may affect the bond strength of intracanal posts to root dentin. PURPOSE: The aim of this study was to compare the effect of calcium hydroxide (Ca(OH)2) and 2% chlorhexidine gel (CHX) on bond strength of fiber post cemented with resin cement to root dentin. MATERIALS AND METHOD: This in vitro experimental study was conducted on 36 mandibular premolars. Canals were prepared using the step back technique...
March 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28293394/evaluation-of-the-expression-of-viii-factor-and-vegf-in-the-regeneration-of-non-vital-teeth-in-dogs-using-propolis
#14
Mina Zarei, Amir Hossein Jafarian, Azadeh Harandi, Maryam Javidi, Maryam Gharechahi
OBJECTIVES: The purpose of the present study was the immunohistochemical evaluation of VEGF and VII factors in dog's teeth pulp revascularized with MTA and propolis. MATERIALS AND METHODS: 144 mature and immature two rooted dog's premolar canals were selected. Pulp necrosis and infection were established after 2 weeks and the disinfection of the canals was done with copious NaOCl irrigation and triantibiotic mixture (ciprofloxacin, metronidazole, and minocycline) for 3 weeks...
February 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28292602/investigation-of-human-dental-pulp-cells-on-a-potential-injectable-poly-lactic-co-glycolic-acid-microsphere-scaffold
#15
Huiru Zou, Guanhua Wang, Fang Song, Xudong Shi
INTRODUCTION: Poly(lactic-co-glycolic acid) (PLGA) has been extensively explored in the tissue engineering field with good biocompatibility and biodegradability. PLGA microspheres' injectable potency makes it highly desirable in dentin-pulp complex regeneration. Therefore, we investigated the cell adhesion, proliferation, odontogenic differentiation, and matrix mineralization of human dental pulp cells (HDPCs) on a PLGA microsphere scaffold. We hypothesized that this scaffold might be suitable for dentin-pulp complex regeneration...
March 11, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28292369/premolar-cystic-ameloblastoma-in-a-child
#16
Sanyog Pathak, Wanjari Ghate Sonalika, Vanishree Hs, Anand S Tegginammani
Mandibular swellings may occur as a result of many benign lesions of odontogenic or non-odontogenic origin. Ameloblastomas are benign tumours of odontogenic origin, whose importance lies in its potential to grow into enormous size with resulting bone deformity, it is a slow-growing, persistent, and locally aggressive neoplasm. The unicystic ameloblastoma (UA) represents an ameloblastoma variant, presenting as a cyst clinically and radiographically, but showing typical ameloblastomatous epithelium lining histologically...
January 2017: Journal of the College of Physicians and Surgeons—Pakistan: JCPSP
https://www.readbyqxmd.com/read/28292342/a-comparison-of-mixed-dentition-dental-development-in-cleft-patients-treated-with-and-without-the-latham-type-appliance
#17
Jin Lin, Veerasathpurush Allareddy, Elizabeth Ross, Stephen Shusterman
PURPOSE: The purpose of this study was to retrospectively evaluate the Latham-type appliance's effect on the development and eruption of posterior teeth during the mixed dentition stage before palatal expansion and secondary alveolar bone graft(s). METHODS: The charts of complete cleft lip and palate (CLP) patients treated with and without the Latham-type appliance were screened using the following inclusion criteria: nonsyndromic; CLP; and available panoramic radiographs and clinical photographs in the mixed dentition prior to palatal expansion and secondary alveolar bone grafts...
January 15, 2017: Pediatric Dentistry
https://www.readbyqxmd.com/read/28291862/a-three-dimensional-finite-element-analysis-of-the-stress-distribution-generated-by-splinted-and-nonsplinted-prostheses-in-the-rehabilitation-of-various-bony-ridges-with-regular-or-short-morse-taper-implants
#18
Marcelo Bighetti Toniollo, Ana Paula Macedo, Renata Cristina Rodrigues, Ricardo Faria Ribeiro, Maria G de Mattos
PURPOSE: The aim of this study was to compare the biomechanical performance of splinted or nonsplinted prostheses over short- or regular-length Morse taper implants (5 mm and 11 mm, respectively) in the posterior area of the mandible using finite element analysis. MATERIALS AND METHODS: Three-dimensional geometric models of regular implants (Ø 4 × 11 mm) and short implants (Ø 4 × 5 mm) were placed into a simulated model of the left posterior mandible that included the first premolar tooth; all teeth posterior to this tooth had been removed...
March 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28289894/the-effect-of-low-level-laser-therapy-on-tooth-movement-during-canine-distalization
#19
Sevin Erol Üretürk, Müyesser Saraç, Sönmez Fıratlı, Şule Batu Can, Yegane Güven, Erhan Fıratlı
The aim of the study is to determine the effects of low level laser therapy on tooth movement during canine distalization by evaluating IL-1β, TGF-β1 levels in gingival crevicular fluid. Maxillary first premolars of the 15 Angle Class II division I patients (12-19 years old) were extracted. Right maxillary canines were distalized by standard protocol as control group whereas the left maxillary canines distalized by laser application. A gallium-aluminum-arsenide diode laser with an output power of 20 mW was applied as five doses from the buccal and the palatal side on the day 0, and the 3rd, 7th, 14th, 21th 30th, 33st, 37th, 60th, 63th, and 67th days...
March 14, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28289759/thermal-imaging-of-the-pulp-during-residual-adhesive-removal
#20
Gökmen Kurt, Nisa Gül, Özgür Er, Gülşen Çakmak, Emre Bendeş, Veysel Aslantaş
OBJECTIVE: The aim of this study was to evaluate the temperature changes of the pulpal area during different adhesive clean-up procedures. MATERIALS AND METHODS: A total of 80 freshly extracted adult maxillary premolar teeth were divided into four groups. Adhesive clean-up was performed with 6- and 12-fluted tungsten carbide burs (TCB) using low- and high-speed handpieces with air or water cooling after bracket debonding. The temperature changes and cool down times were evaluated with a thermal camera...
March 13, 2017: Journal of Orofacial Orthopedics, Fortschritte der Kieferorthopädie
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