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Journal of Dentistry of Tehran University of Medical Sciences

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https://www.readbyqxmd.com/read/29104603/oral-lichen-planus-in-a-pediatric-patient-a-novel-therapeutic-approach
#1
Gaurav Sharma, Divesh Sardana, Puneeta Vohra, Shweta Rehani, Archna Nagpal
Lichen planus is a mucocutaneous disease, predominantly affecting the middle-aged individuals and may be associated with a plethora of signs and symptoms related to the skin, scalp, nails and mucous membranes. The definitive etiology of lichen planus is not yet known and no therapeutic modality has yet been universally accepted. Lichen planus in pediatric patients is a rare phenomenon and its presence in the oral mucosa is even rarer. The aim of this article is to present a rare case of a symptomatic oral lichen planus (OLP) occurring in a 12-year old child that was managed successfully with a novel sequential modality of topical retinoids followed by aloe vera gel application...
March 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/29104602/management-of-limited-interocclusal-distance-with-the-aid-of-a-modified-surgical-guide-a-clinical-report
#2
Farideh Geramipanah, Leyla Sadighpour, Amirreza Hendi
In completely edentulous patients, limited interarch distance can compromise conventional prosthetic fabrication. Bone reduction through various surgical procedures has been recommended to restore an acceptable interarch distance. In such circumstances, a surgical guide built on a mounted cast can be used to minimize and control the amount of bone reduction performed. In the present report, an innovative method of fabrication of surgical guide has been described.
March 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/29104601/treatment-of-a-four-rooted-maxillary-second-molar-detected-with-cone-beam-computed-tomography
#3
Nahid Mohammadzade Akhlaghi, Mahta Fazlyab
The significance of clinician's knowledge about root canal anatomy and its possible variations cannot be overlooked. In some cases, taking advantage of complementary imaging techniques can help achieve a perfect flawless endodontic treatment. This article reports endodontic management of a second maxillary molar that had an uncommon anatomy of the chamber floor. After obtaining a cone-beam computed tomography (CBCT) image, the presence of a second palatal root was confirmed. All four roots were treated and patient's symptoms were resolved...
March 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/29104600/one-year-clinical-success-of-embrace-hydrophilic-and-helioseal-f-hydrophobic-sealants-in-permanent-first-molars-a-clinical-trial
#4
Nahid Askarizadeh, Haleh Heshmat, Nazanin Zangeneh
Objectives: This study sought to compare the one-year clinical success of a hydrophilic and a hydrophobic fissure sealant in permanent first molars. Materials and Methods: This split-mouth clinical trial was conducted on 23 six to nine year olds who had four fully erupted sound first molars. Helioseal-F and Embrace sealants were randomly applied on the first molars, and follow-ups were scheduled at three, six and 12 months to examine the teeth according to USPHS criteria (retention, marginal adaptation, color match, surface smoothness and caries recurrence)...
March 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/29104599/one-year-clinical-evaluation-of-a-low-shrinkage-composite-compared-with-a-packable-composite-resin-a-randomized-clinical-trial
#5
Razieh Hoseinifar, Elaheh Mortazavi-Lahijani, Hassan Mollahassani, Ahmad Ghaderi
Objectives: The aim of this study was to evaluate the clinical performance of a packable and a low shrinkage methacrylate-based composite after one year. Materials and Methods: In this clinical trial, 50 class I or II restorations were placed in 25 patients. Each patient received two restorations. The tested materials were: (I) Filtek P60 + Single Bond 2 and (II) Kalore GC + Single Bond 2. The restorations were evaluated by two independent examiners after one week (baseline), six months and one year according to the modified United States Public Health Service (USPHS) criteria...
March 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/29104598/effect-of-proanthocyanidin-fluoride-and-casein-phosphopeptide-amorphous-calcium-phosphate-remineralizing-agents-on-microhardness-of-demineralized-dentin
#6
Zahra Khamverdi, Matin Kordestani, Ali Reza Soltanian
Objectives: The aim of this study was to evaluate the effect of dentin remineralization using proanthocyanidin (PA), fluoride varnish and casein phosphopeptide amorphous calcium phosphate (CPP-ACP) paste and their various combinations on microhardness of demineralized root dentin. Materials and Methods: One-hundred and twenty freshly extracted sound human premolars were selected and randomly divided into eight groups for dentin treatment as follows. C: Deionized water (control); PA: 6...
March 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/29104597/effects-of-wet-and-dry-finishing-and-polishing-on-surface-roughness-and-microhardness-of-composite-resins
#7
Negin Nasoohi, Maryam Hoorizad, Seyedeh Farnaz Tabatabaei
Objectives: This study aimed to assess the effect of wet and dry finishing and polishing on microhardness and roughness of microhybrid and nanohybrid composites. Materials and Methods: Thirty samples were fabricated of each of the Polofil Supra and Aelite Aesthetic All-Purpose Body microhybrid and Grandio and Aelite Aesthetic Enamel nanohybrid composite resins. Each group (n=30) was divided into three subgroups of D, W and C (n=10). Finishing and polishing were performed dry in group D and under water coolant in group W...
March 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/29104596/deposition-of-crystalline-hydroxyapatite-nanoparticles-on-y-tzp-ceramic-a-potential-solution-to-enhance-bonding-characteristics-of-y-tzp-ceramics
#8
Abbas Azari, Sakineh Nikzad Jamnani, Arash Yazdani, Faezeh Atri, Vania Rasaie, Abbas Fazel Anvari Yazdi
Objectives: Many advantages have been attributed to dental zirconia ceramics in terms of mechanical and physical properties; however, the bonding ability of this material to dental structure and/or veneering ceramics has always been a matter of concern. On the other hand, hydroxyapatite (HA) shows excellent biocompatibility and good bonding ability to tooth structure, with mechanically unstable and brittle characteristics, that make it clinically unacceptable for use in high stress bearing areas...
March 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28828018/effect-of-intracanal-post-space-treatments-on-push-out-bond-strength-of-fiber-posts-to-root-dentin
#9
Hamid Kermanshah, Behnam Bolhari, Faraz Sedaghat, Ladan Ranjbar Omrani
OBJECTIVES: The main disadvantage of fiber posts is their low bond strength to root canal wall. The aim of the present study was to assess the effect of different root canal post space treatments on push-out bond strength of fiber posts to root canal dentin. MATERIALS AND METHODS: After post space preparation in 40 endodontically treated human premolars, the teeth were randomly divided into four experimental groups: Group 1: control group, group 2: Endsolv R, group 3: ultrasonic cleaning, group 4: Clearfil Repair...
January 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28828017/cross-cultural-adaptation-of-persian-version-of-scale-of-oral-health-outcomes-for-5-year-old-children
#10
Imaneh Asgari, Elaheh Kazemi
OBJECTIVES: Indicators of oral health-related quality of life (OHRQoL) in children are widely adopted to evaluate the effects of oral problems. Recently, the scale of oral health outcomes for 5-year-old children (SOHO-5) was developed based on the children's self-reports. This study aimed to evaluate the validity and reliability of the Persian version of the questionnaire in a sample of Iranian children. MATERIALS AND METHODS: This cross-sectional study was conducted on 160 children from four areas of Isfahan selected via non-random purposive sampling...
January 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28828016/effect-of-polyvinyl-siloxane-viscosity-on-accuracy-of-dental-implant-impressions
#11
Ahmad Ghahremanloo, Mahdieh Seifi, Jalil Ghanbarzade, Seyyed Mohammad Abrisham, Rashid Abdolah Javan
OBJECTIVES: The aim of this study was to compare the accuracy of dental implant impressions obtained by a combination of different impression techniques and viscosities of polyvinyl siloxane (PVS). MATERIALS AND METHODS: Four parallel fixtures were placed between mental foramina in a master model of lower dental arch. Three different viscosities (putty/light body, medium body/light body, and monophase: heavy body) and direct and indirect techniques (six groups) were used, and seven impressions were obtained from each group (n=42)...
January 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28828015/effect-of-storage-period-on-dimensional-stability-of-alginplus-and-hydrogum-5
#12
Shima Aalaei, Rohollah Ganj-Khanloo, Fatemeh Gholami
OBJECTIVES: This study aimed to evaluate the effect of storage period on dimensional stability of Alginplus and Hydrogum 5. MATERIALS AND METHODS: In this in vitro experimental study, 60 impressions were taken of an upper jaw typodont, including 10 impressions for each storage period to be tested (12 minutes, 24 and 120 hours) for each type of alginate. Then, the impressions were stored in an incubator with stable temperature and humidity, and poured using a type III dental stone...
January 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28828014/diagnostic-value-of-conventional-and-digital-radiography-for-detection-of-cavitated-and-non-cavitated-proximal-caries
#13
Mahdieh Dehghani, Rasool Barzegari, Hosein Tabatabai, Sahar Ghanea
OBJECTIVES: This study aimed to assess the diagnostic value of conventional and digital radiography for detection of cavitated and non-cavitated proximal caries. MATERIALS AND METHODS: Fifty extracted human premolars and molars were mounted in a silicone block. Charge-coupled device (CCD) and photostimulable phosphor plate (PSP) receptors and intra-oral films were exposed with 60 and 70 kVp with parallel technique. Two observers interpreted the radiographs twice with a two-week interval using a 5-point scale...
January 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28828013/retentive-strength-of-orthodontic-bands-cemented-with-amorphous-calcium-phosphate-modified-glass-ionomer-cement-an-in-vitro-study
#14
Farzin Heravi, Maryam Omidkhoda, Niloufar Koohestanian, Tabassom Hooshmand, Hossein Bagheri, Negin Ghaffari
OBJECTIVES: The aim of this study was to evaluate and compare the retentive strength of orthodontic bands cemented with amorphous calcium phosphate (ACP)-containing and conventional glass ionomer cements (GICs). MATERIALS AND METHODS: One-hundred-and-twenty mandibular third molars were embedded in acrylic resin blocks with the buccal surface of crowns perpendicular to the base of the mold. The teeth were randomly divided into four groups containing 30 teeth each...
January 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28828012/evaluation-of-properties-of-mineral-trioxide-aggregate-with-methyl-cellulose-as-liquid
#15
Omid Dianat, Mandana Naseri, Seyedeh Farnaz Tabatabaei
OBJECTIVES: Mineral trioxide aggregate (MTA) is extensively used in endodontics. However, MTA is difficult to handle because of its granular consistency, low mechanical properties and initial looseness. The objective of this study was to assess the compressive strength (CS), diametral tensile strength (DTS), and pH of set MTA using methyl cellulose as liquid. MATERIALS AND METHODS: White ProRoot MTA was used as the control group; modified MTA cement was prepared by mixing Portland cement, bismuth oxide and calcium sulfate (75%, 20% and 5%, respectively) as the experiment group...
January 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28828011/effect-of-intranasal-sedation-using-ketamine-and-midazolam-on-behavior-of-3-6-year-old-uncooperative-children-in-dental-office-a-clinical-trial
#16
Majid Mehran, Sara Tavassoli-Hojjati, Nazila Ameli, Mehdi Salehi Zeinabadi
OBJECTIVES: The aim of the present study was to compare the effects of intranasal ketamine and midazolam on behavior of 3-6 year-old children during dental treatments. MATERIALS AND METHODS: In this randomized cross-over clinical trial, 17 uncooperative children requiring at least two dental treatments were selected and randomly received ketamine (0.5mg/kg) or midazolam (0.2mg/kg) prior to treatment. The other medication was used in the next visit. The children's behavioral pattern was determined according to the Houpt's scale regarding sleep, movement, crying and overall behavior...
January 2017: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28243307/a-case-report-of-dilacerated-crown-of-a-permanent-mandibular-central-incisor
#17
Behnam Bolhari, Salma Pirmoazen, Ensieh Taftian, Somayeh Dehghan
Trauma to primary teeth can lead to devastating sequels in development of permanent successors. The disturbance may range from enamel hypoplasia and/or hypo-calcification to arrest of dental bud development. Crown dilaceration of permanent teeth is one of the consequences of trauma to deciduous teeth mainly due to intrusion or avulsion. This report presents a mandibular central incisor with dilacerated crown and yellowish discoloration with symptomatic apical abscess. History revealed avulsion of primary mandibular central incisors...
November 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28243306/canal-configuration-of-mesiobuccal-roots-in-permanent-maxillary-first-molars-in-iranian-population-a-systematic-review
#18
Mandana Naseri, Mohammad Javad Kharazifard, Sepanta Hosseinpour
OBJECTIVES: It is essential for clinicians to have adequate knowledge about root canal configurations; although its morphology varies largely in different ethnicities and even in different individuals with the same ethnic background. The current study aims to review the root canal configurations of mesiobuccal roots of maxillary first molars in an Iranian population based on different epidemiological studies. MATERIALS AND METHODS: A comprehensive search was conducted to retrieve articles related to root canal configuration and prevalence of each type of root canal based on Vertucci's classification for the mesiobuccal root of maxillary first molars...
November 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28243305/effect-of-different-surface-treatments-on-microtensile-bond-strength-of-composite-resin-to-normal-and-fluorotic-enamel-after-microabrasion
#19
Mahshid Mohammadi Bassir, Mohammad Bagher Rezvani, Elham Tabatabai Ghomsheh, Zahra Malek Hosseini
OBJECTIVES: This study aimed to determine the effect of surface treatments such as tooth reduction and extending the etching time on microtensile bond strength (╬╝TBS) of composite resin to normal and fluorotic enamel after microabrasion. MATERIALS AND METHODS: Fifty non-carious anterior teeth were classified into two groups of normal and fluorotic (n=25) using Thylstrup and Fejerskov index (TFI=4-6). Teeth in each group were treated with five modalities as follows and restored with OptiBond FL and Z350 composite resin: 1-Etching (30 seconds), bonding, filling (B); 2-Tooth reduction (0...
November 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28243304/comparison-of-bond-strength-of-metal-and-ceramic-brackets-bonded-with-conventional-and-high-power-led-light-curing-units
#20
Javad Chalipa, Yasamin Farajzadeh Jalali, Fatemeh Gorjizadeh, Pedram Baghaeian, Mohammad Hashem Hoseini, Omid Mortezai
OBJECTIVES: The aim of this study was to evaluate the effect of conventional and high-power light emitting diode (LED) light curing units on shear bond strength (SBS) of metal and ceramic brackets to tooth surface. MATERIALS AND METHODS: Forty sound bovine maxillary central incisors were used for the study. The teeth were divided into four groups (n=10). Teeth surfaces were etched with 37% phosphoric acid for 20 seconds. After applying a uniform layer of adhesive primer on the etched enamel, composite was placed on the base of brackets...
November 2016: Journal of Dentistry of Tehran University of Medical Sciences
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