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Journal of Dentistry of Tehran University of Medical Sciences

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https://www.readbyqxmd.com/read/27928243/surgical-repair-of-a-median-cleft-of-the-upper-lip-via-a-pfeifer-incision-a-case-report
#1
Rajeev Pandey, Rajat Gupta, Nitin Bhagat, Aviral Verma
Median cleft is the midline cleft of the lip. It develops due to incomplete or failed fusion of the median nasal prominence. It can present with minimal deformities such as involvement of the vermilion border, or complex clefting of the midline structures and brain. Median clefts are broadly classified as true and false clefts. This case report describes a rare case of median cleft of the upper lip involving the white roll, which was not associated with any other deformities. Treatment included reconstruction of the philtrum and the cupid's bow while maintaining vermilion fullness and continuity, and minimizing scar formation...
March 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/27928242/dental-management-of-a-child-with-dentinogenesis-imperfecta-a-case-report
#2
Najmeh Akhlaghi, Ali-Reza Eshghi, Mehrnaz Mohamadpour
Dentinogenesis imperfecta (DI) is a hereditary dentin defect caused by an autosomal dominant mutation in dentin sialophosphoprotein gene. Defective dentin development results in discolored teeth that are prone to wear and fracture. Early diagnosis and proper treatment are necessary to achieve better functional and esthetic results and minimize nutritional deficiencies and psychosocial distress. In order to prevent excessive loss of tooth structure, placement of stainless steel crowns (SSCs) on deciduous and young permanent posterior teeth is recommended as soon as such teeth erupt...
March 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/27928241/assessment-of-location-and-anatomical-characteristics-of-mental-foramen-anterior-loop-and-mandibular-incisive-canal-using-cone-beam-computed-tomography
#3
Mehrdad Panjnoush, Zonnar Sadat Rabiee, Yasaman Kheirandish
OBJECTIVES: This study aimed to evaluate the location and characteristics of mental foramen, anterior loop and mandibular incisive canal using cone beam computed tomography (CBCT). MATERIALS AND METHODS: This retrospective cross-sectional study evaluated 200 mandibular CBCT scans for the location of mental foramen, anterior loop prevalence and mandibular incisive canal visibility, its mean length and distance to buccal and lingual plates and inferior border of the mandible...
March 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/27928240/color-stability-of-nanofilled-and-microhybrid-resin-based-composites-following-exposure-to-chlorhexidine-mouthrinses-an-in-vitro-study
#4
Mahmood Khosravi, Behnaz Esmaeili, Forough Nikzad, Soraya Khafri
OBJECTIVES: This study aimed to evaluate the effects of chlorhexidine mouthrinses on color stability of nanofilled and micro-hybrid resin-based composites. MATERIALS AND METHODS: In this in-vitro study, 160 disc-shaped specimens (7x2mm) were fabricated of Filtek Z250 and Filtek Z350XT Enamel (A2 shade). The samples of each group were randomly divided into eight subgroups (n=10). The specimens were incubated in artificial saliva at 37°C for 24 hours. The baseline color values (L*, a*, b*) of each specimen were measured according to CIE LAB system using a reflection spectrophotometer...
March 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/27928239/comparison-of-tissue-density-in-hounsfield-units-in-computed-tomography-and-cone-beam-computed-tomography
#5
Masoud Varshowsaz, Sepideh Goorang, Sara Ehsani, Zeynab Azizi, Sepideh Rahimian
OBJECTIVES: Bone quality and quantity assessment is one of the most important steps in implant treatment planning. Different methods such as computed tomography (CT) and recently suggested cone beam computed tomography (CBCT) with lower radiation dose and less time and cost are used for bone density assessment. This in vitro study aimed to compare the tissue density values in Hounsfield units (HUs) in CBCT and CT scans of different tissue phantoms with two different thicknesses, two different image acquisition settings and in three locations in the phantoms...
March 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/27928238/conscious-sedation-efficacy-of-0-3-and-0-5-mg-kg-oral-midazolam-for-three-to-six-year-old-uncooperative-children-undergoing-dental-treatment-a-clinical-trial
#6
Masoud Fallahinejad Ghajari, Ghassem Ansari, Leila Hasanbeygi, Shahnaz Shayeghi
OBJECTIVES: Midazolam with variable dosages has been used to induce sedation in pediatric dentistry. The aim of this study was to compare the efficacy of two dosages of oral midazolam for conscious sedation of children undergoing dental treatment. MATERIALS AND METHODS: In this randomized crossover double blind clinical trial, 20 healthy children (ASA I) aged three to six years with definitely negative Frankl behavioral rating scale were evaluated. Half of the children received 0...
March 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/27928237/effect-of-accelerated-artificial-aging-on-translucency-of-methacrylate-and-silorane-based-composite-resins
#7
Mehdi Shirinzad, Loghman Rezaei-Soufi, Maryam Sadat Mirtorabi, Farshid Vahdatinia
OBJECTIVES: Composite restorations must have tooth-like optical properties namely color and translucency and maintain them for a long time. This study aimed to compare the effect of accelerated artificial aging (AAA) on the translucency of three methacrylate-based composites (Filtek Z250, Filtek Z250XT and Filtek Z350XT) and one silorane-based composite resin (Filtek P90). MATERIALS AND METHODS: For this in vitro study, 56 composite discs were fabricated (n=14 for each group)...
March 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/27928236/perception-of-laypeople-and-dental-professionals-of-smile-esthetics
#8
Aida Saffarpour, Maryam Ghavam, Anna Saffarpour, Rozita Dayani, Mohammad Javad Kharazi Fard
OBJECTIVES: This study aimed to assess and compare the perception of laypersons and dental professionals of smile esthetics based on two factors namely gingival display and alignment of teeth. MATERIALS AND METHODS: A total of 32 females were randomly selected among dental students in the International Campus of School of Dentistry, Tehran University of Medical Sciences (Tehran, Iran) with no previous history of esthetic dental work. Frontal photographs were obtained and cropped from the subnasal to menton areas of subjects to standardize the size of pictures...
March 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/27928235/diagnostic-accuracy-of-cbct-with-different-voxel-sizes-and-intraoral-digital-radiography-for-detection-of-periapical-bone-lesions-an-ex-vivo-study
#9
Shirin Sakhdari, Ahmad Reza Talaeipour, Maziar Talaeipour, Maryam Pazhutan, Sanaz Heidarkhan Tehrani, Mohammad Javad Kharazifard
OBJECTIVES: This study sought to assess the diagnostic accuracy of cone beam computed tomography (CBCT) with different voxel sizes and intraoral digital radiography with photostimulable phosphor (PSP) plate for detection of periapical (PA) bone lesions. MATERIALS AND METHODS: In this ex vivo diagnostic study, one-millimeter defects were created in the alveolar sockets of 15 bone blocks, each with two posterior teeth. A no-defect control group was also included. Digital PA radiographs with PSP plates and CBCT scans with 200, 250 and 300μ voxel sizes were obtained...
March 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/27928234/agent-based-modeling-an-innovative-opportunity-for-population-based-oral-health-promotion
#10
Maryam Sadeghipour Roudsari, Seyed Peyman Shariatpanahi, Arezoo Ebn Ahmady, Mohammad Hossein Khoshnevisan
No abstract text is available yet for this article.
March 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/27536331/fabrication-of-a-cranial-prosthesis-combined-with-an-ocular-prosthesis-using-rapid-prototyping-a-case-report
#11
Gayatri Shankaran, Suryakant Chhagan Deogade, Rajesh Dhirawani
Rapid prototyping (RP) is a technique of manufacturing parts by the additive layer manufacturing technology; where, a three-dimensional (3D) model created in a computer aided design (CAD) system is sectioned into 2D profiles, which are further constructed by RP layer by layer. Its use is not limited to industrial or engineering fields and has extended to the medical field for the manufacturing of custom implants and prostheses, the study of anatomy and surgical planning. Nowadays, dentists are more frequently encountered with the individuals affected with craniofacial defects due to trauma...
January 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/27536330/comparison-of-shear-bond-strength-of-composite-to-stainless-steel-crowns-using-two-mechanical-surface-treatments-and-two-bonding-systems
#12
Sara Ghadimi, Alireza Heidari, Hamid Sarlak
OBJECTIVES: This study aimed to compare the shear bond strength (SBS) of composite to stainless steel crowns (SSC) using two mechanical surface treatments (MSTs) and two bonding systems. MATERIALS AND METHODS: Eighty-four SSCs were divided into six groups of 14; Group1: No MST+Scotchbond Universal adhesive (N+U), Group 2: Surface roughening by a diamond bur+Scotchbond Universal adhesive (R+U), Group 3: Sandblasting+Scotchbond Universal adhesive (S+U), Group 4: No MST+Alloy Primer+Clearfil SE Primer and Bond (N+A), Group 5: Surface roughening by a diamond bur+Alloy Primer+Clearfil SE Primer and Bond (R+A), Group 6: Sandblasting+Alloy Primer+Clearfil SE Primer and Bond (S+A)...
January 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/27536329/quality-assessment-of-information-about-pit-and-fissure-sealants-in-persian-websites-in-2012
#13
Firoozeh Nilchian, Leila Ghasemi
OBJECTIVES: Despite the increasing use of Internet, there is no supervision over the accuracy and quality of the information provided in the web. To deal with this problem, health specialists should take part in planning, publishing and supervision of online health-related information. The aim of this study was to evaluate the quality of information related to pit and fissure sealants in Persian websites. MATERIALS AND METHODS: In this cross-sectional study, Persian websites providing information about fissure sealants were found using Google search engine...
January 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/27536328/evaluation-of-antibacterial-effects-of-silver-coated-stainless-steel-orthodontic-brackets
#14
Valiollah Arash, Fatemeh Keikhaee, Sayed Mahmood Rabiee, Ramazan Rajabnia, Soraya Khafri, Saeid Tavanafar
OBJECTIVES: White spots and enamel demineralization around orthodontic brackets are among the most important complications resulting from orthodontic treatments. Since the antibacterial properties of metals and metallic particles have been well documented, the aim of this study was to assess the antibacterial effect of stainless steel orthodontic brackets coated with silver (Ag) particles. MATERIALS AND METHODS: In this study, 40 standard metal brackets were divided into two groups of 20 cases and 20 controls...
January 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/27536327/dental-students-preference-with-regard-to-tactile-or-visual-determination-of-injection-site-for-an-inferior-alveolar-nerve-block-in-children-a-crossover-randomized-clinical-trial
#15
Nahid Ramazani, Seyed Masoud Iranmanesh
OBJECTIVES: Instruction of local anesthesia injection in an important part of dental education curricula. This study was performed to compare dental students' preference with regard to tactile or visual determination of injection site for an inferior alveolar nerve block (IANB) in children. MATERIALS AND METHODS: This crossover randomized clinical trial was conducted on dental students of Zahedan Dental School who took the first practical course of pediatric dentistry in the first academic semester of 2013-14 (n=42)...
January 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/27536326/shear-bond-strength-of-a-resin-cement-to-different-alloys-subjected-to-various-surface-treatments
#16
Fariba Ezoji, Kasra Tabari, Zahra Jaberi Ansari, Hassan Torabzadeh, Mohammad Javad Kharrazi Fard
OBJECTIVES: Micromechanical retention of resin cements to alloys is an important factor affecting the longevity of metal base restorations. This study aimed to compare the bond strength and etching pattern of a newly introduced experimental etchant gel namely Nano Met Etch with those of conventional surface treatment techniques for nickel-chrome (Ni-Cr) and high noble alloys. MATERIALS AND METHODS: A total of 120 discs (8×10×15 mm) were cast with Ni-Cr (n=20), high noble BegoStar (n=50) and gold coin alloys (n=50)...
January 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/27536325/treatment-of-symptomatic-geographic-tongue-with-triamcinolone-acetonide-alone-and-in-combination-with-retinoic-acid-a-randomized-clinical-trial
#17
Shamsoulmolouk Najafi, Narges Gholizadeh, Elahe Akhavan Rezayat, Mohammad Javad Kharrazifard
OBJECTIVES: Geographic tongue or migratory glossitis is an inflammatory disorder with unknown etiology. Considering the accompanied burning pain, taste dysfunction, and lack of definite cure, it is important to treat this condition symptomatically. The objective of the current study was to compare the efficacy of a combination of 0.05% retinoic acid and 0.1% triamcinolone acetonide with that of triamcinolone acetonide alone for treatment of symptomatic geographic tongue. MATERIALS AND METHODS: This randomized controlled double-blind clinical trial was performed on 28 patients with symptomatic geographic tongue, who were referred to two dental clinics...
January 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/27536324/effect-of-fixed-orthodontic-treatment-on-salivary-flow-ph-and-microbial-count
#18
Sepideh Arab, Sepideh Nouhzadeh Malekshah, Ehsan Abouei Mehrizi, Anita Ebrahimi Khanghah, Roya Naseh, Mohammad Moslem Imani
OBJECTIVES: The present study was designed to evaluate the changes in saliva properties and oral microbial flora in patients undergoing fixed orthodontic treatment. MATERIALS AND METHODS: Two important saliva properties namely the salivary flow rate and pH as well as oral microbial flora were assessed in 30 orthodontic patients before starting fixed orthodontic treatment and after six, 12 and 18 weeks of treatment. Selective media, Sabouraud dextrose agar, Mitis salivarius agar and Rogosa agar were used for isolation of Candida albicans, Streptococcus mutans and Lactobacillus acidophilus, respectively...
January 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/27536323/comparison-of-single-visit-post-endodontic-pain-using-mtwo-rotary-and-hand-k-file-instruments-a-randomized-clinical-trial
#19
Mohamad Kashefinejad, Azade Harandi, Saeed Eram, Ali Bijani
OBJECTIVES: Pain is an unpleasant outcome of endodontic treatment that can be unbearable to patients. Instrumentation techniques may affect the frequency and intensity of post-endodontic pain. This study aimed to compare single visit post endodontic pain using Mtwo (NiTi) rotary and hand K-file instruments. MATERIALS AND METHODS: In this randomized controlled trial, 60 teeth with symptomatic irreversible pulpitis in 53 patients were selected and randomly assigned into two groups of 30 teeth...
January 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/27536322/evaluation-of-salivary-leptin-levels-in-healthy-subjects-and-patients-with-advanced-periodontitis
#20
Afshin Khorsand, Mojtaba Bayani, Siamak Yaghobee, Sepehr Torabi, Mohammad Javad Kharrazifard, Fatemeh Mohammadnejhad
OBJECTIVES: Leptin is a hormone-like protein produced by the adipose tissue. It plays an important role in protection of host against inflammation and infection. Some studies have reported changes in leptin levels in the gingival crevicular fluid (GCF), saliva and blood serum of patients with periodontal disease compared to healthy individuals. The aim of the present study was to compare the salivary leptin levels in patients with advanced periodontitis and healthy individuals. MATERIALS AND METHODS: In this case-control study, the salivary samples of healthy individuals and patients with advanced periodontitis with clinical attachment loss >5mm were obtained using a standardized method and the leptin levels were measured in the salivary samples by means of ELISA...
January 2016: Journal of Dentistry of Tehran University of Medical Sciences
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