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Dental Research Journal

Carmen García-Marín, Paula Ferrer, María Victoria Mateos, Nazaret Rodríguez, Encarna de Fernando, José María Marín, Rosa Yanez
Nonsyndromic unilateral permanent canine agenesis, particularly in the lower jaw, is an infrequent clinical observation that has occasionally been reported in the scientific literature. The main aim of the present case report and study is to give insights into the clinical features and genetic information of a nonsyndromic patient affected by unilateral lower canine agenesis and her relatives. A young girl of 9-year-old with a Class II skeletal malocclusion, sella turcica bridging, and severe overjet but no other dental anomalies is described...
September 2018: Dental Research Journal
Somayeh Hekmatfar, Hediyeh Piraneh, Karim Jafari
Background: Iron supplement is recommended for alleviating iron deficiency. Black discoloration of teeth is one of the side effects of consumption of iron supplements. Besides these effects, iron drops may also act directly on the dental hard tissues, with erosive lesions as possible outcomes of their content. In this regard, we decided to compare iron absorption of five types of iron drops in enamel and determine its relationship with pH and titrable acidity (TA) of them. Materials and Methods: In this in-vitro study The pH of 5 kinds of iron was measured by a digital pH meter...
September 2018: Dental Research Journal
Nafiseh Shamloo, Nasim Taghavi, Farzad Yazdani, Soudeh Shalpoush, Samane Ahmadi
Background: CD44 is a transmembranous proteoglycan, with a main role of cell adhesion to other cells and to extracellular matrix involved in the preservation of three-dimensional structure of organs. Pleomorphic adenoma (PA) is a common benign salivary gland tumor, composed of myoepithelial and ductal components. Carcinoma ex-PA (CXPA) is malignant transformation of the epithelial elements in PA. The aim of this study was to evaluate CD44 expression by immunohistochemistry in these two tumors and normal salivary gland near these tumors...
September 2018: Dental Research Journal
Neda Sinaee, Sasan Salahi, Mostafa Sheikhi
Background: The heat from laser can lead to the destruction of organic components of enamel and consequently changes in the mechanical properties of enamel. The purpose of this study was to evaluate the effect of diode laser on the nanomechanical properties of enamel in the process of debonding the ceramic brackets. Materials and Methods: In This in vitro study Eighteen ceramic brackets were bonded on the intact premolars in 3 groups of 6 (one control and two study groups)...
September 2018: Dental Research Journal
Shima Golmohammadi, Amir Eskandari, Mohammad Reza Movahhedy, Adileh Shirmohammadi, Reza Amid
Background: The researches regarding the influence of microthread design variables on the stress distribution in bone and a biomechanically optimal design for implant neck are limited. The aim of the present study is to compare the effect of different microthread designs on crestal bone stress. Materials and Methods: Six implant models were constructed for three-dimensional finite element analysis including two thread profile (coarse and fine) with three different lengths of microthreaded neck (1 mm, 2 mm, and 3 mm)...
September 2018: Dental Research Journal
Masoomeh Aslanimehr, Niloofar Mojarad, Safarali Ranjbar, Shima Aalaei
Background: Dentures can be a source of infection or cross-contamination with microorganisms like Candida albicans . The aim of this in vitro study was to compare the effects of microwave irradiation, chemical techniques, and a mechanical method (i.e., brushing) on the disinfection of complete dentures contaminated with C. albicans . Materials and Methods: In this experimental study, sixty sterilized dentures were divided into six groups of 10 dentures each. The dentures in Groups 1 and 6 served as negative and positive controls, respectively...
September 2018: Dental Research Journal
Dhanalakshmi Ravikumar, Deepa Gurunathan, R Gayathri, V Vishnu Priya, R V Geetha
Background: The purpose of this study was to identify the genetic patterns of Streptococcus mutans by DNA finger printing among caries-active, caries-free, and in children with black tooth stains. Materials and Methods: In this in vitro study Ten children with black tooth stains and ten caries-free and caries-active children between 3 and 6 years of age were recruited. Saliva samples were collected using a sterile tube, followed by microbial culture of S. mutans , DNA isolation, and polymerase chain reaction amplification...
September 2018: Dental Research Journal
R Ananthalakshmi, Jaideep Mahendra, P Jayamathi, Little Mahendra, Nashra Kareem, S Subramaniam
Background: Yogic stretching (asana) has been proven to have an effect on salivary human beta-defensin-2 (HBD-2) concentration, which is an antimicrobial peptide and is an inflammatory marker in periodontal disease. Sudarshan Kriya Pranayama (SKP) is a part of yoga which involves rhythmic breathing. Hence, we aim to evaluate the periodontal parameters and to estimate the salivary HBD-2 level before and after SKP program in periodontitis individuals. Materials and Methods: An interventional study was designed and individuals were divided into three groups: Group I - healthy periodontium, Group II - chronic gingivitis, and Group III - chronic periodontitis...
September 2018: Dental Research Journal
Zahra Azarbayjani, Tahereh Sadat Jafarzadeh Kashi, Yasaman Erfan, Nasim Chiniforush, Vahid Rakhshan
Background: Evidence on the protecting effect of laser on bleached enamel is scarce and controversial. Therefore, we aimed to test for the first time whether different wavelengths of diode laser (810 and 980 nm) can prevent enamel surface corrosion. We also tested for the first time whether such therapeutic effects of laser are limited to specific "laser-activated" bleaching gels or both conventional and laser-activated gels. Materials and Methods: In this qualitative experimental study, ten intact human teeth were randomly assigned to five Groups...
September 2018: Dental Research Journal
Farbod Manshaee, Hadi Shakerin
Background: Setting of condylar inclination is inaccurate in nonarcon articulators because of alteration of the angle between the upper member and condylar track. This article presents a device which can be attached to a nonarcon articulator to rectify errors related to alterations of maxillary occlusal plane-horizontal condylar guidance relation in nonarcon articulators. Materials and Methods: The device provides tight connection of condylar axis to condylar track by mechanical interdigitation of fragments which are placed on condylar axis and condylar track...
September 2018: Dental Research Journal
Seyed Amir Mousavi, Abbasali Khademi, Parisa Soltani, Shirin Shahnaseri, Marzie Poorghorban
Background: Adequate seal of the root canal is necessary to prevent recontamination and ensure the long-term clinical success. The aim of this study was to evaluate the sealing ability of ProRoot mineral trioxide aggregate (MTA), Biodentine, and Ortho MTA as the root canal obturation materials using the fluid infiltration method. Materials and Methods: In this invitro study a total of 66 extracted human mandibular premolars were randomly divided into five groups according to the material used for the root canal obturation...
September 2018: Dental Research Journal
Mohsen Ramazani, Saeed Asgary
This case report describes miniature pulpotomy (MP) with calcium-enriched mixture (CEM) cement, 1 week after carious pulpal exposure of a symptomatic mature molar. A 24-year-old woman was referred with complaining of severe lingering pain on the second upper left molar; a dental history revealed that the tooth had been prepared 1 week ago, but on pulp exposure, her dentist just dressed the cavity. After anesthesia/isolation in the same session, the temporary restoration was removed, the previously pulpal exposure was observed, and MP was carried out...
July 2018: Dental Research Journal
Ali Barzegar, Tahereh Ghaffari
Background: Incorporation of extra fillers into dental resins might enhance their physical properties. In this study, the tensile and impact strengths of modified heat-curing acrylic resin reinforced with nanoclay were investigated. Materials and Methods: In this experimental study, nanoclay-acrylic resin composite was prepared by mixing 0.5, 1, and 2 wt% of nanoclay with methacrylate monomer in an ultrasonic probe, followed by mixing with the polymethylmethacrylate (PMMA) powder...
July 2018: Dental Research Journal
Fahime Kooshki, Fahimeh S Tabatabaei, Sahar Tajik, Azadeh Aayan
Background: Nowadays, health-care companies use different antimicrobial agents in toothpastes to reduce oral microorganisms. The aim of this study was to investigate the antimicrobial effects of one Iranian herbal toothpaste in different concentrations compared with the chemical type on oral microorganisms in vitro . Materials and Methods: In this experimental study, the antimicrobial effect of one Iranian herbal toothpaste in comparison with its chemical type at three concentrations of 1, 1:1, and 1:3 on Streptococcus mutans (SM), Lactobacillus (LB), and Candida albicans (CA), respectively, were studied by agar disc diffusion method...
July 2018: Dental Research Journal
Jafar Memarian, Mohammad Ketabi, Shahram Amini
Background: One of the most common problems in edentulous patients is the low stability of lower dentures. The most effective method to overcome this problem is implant-supported overdentures. After placing an implant, for the process of osseointegration to be complete and successful, it is better that patients do not use their denture for few months. This may be nonconvenient for patient because they are unable to speak and eat properly. The aim of this study was to evaluate the effect of low level laser (LLL) and light-emitting diode (LED) photobiomodulation on implant stability as well as their effect on interleukin-1 beta (IL-1β) and prostaglandin E2 (PGE2) biomarkers around implant in lower anterior region (over denture)...
July 2018: Dental Research Journal
Shiva Alavi, Navid Yaraghi
Background: Difficulties to maintain good oral hygiene during orthodontic treatment can cause prolonged accumulation of dental plaque, thereby increasing the risk of developing gingival inflammation and periodontal disease as well as enamel demineralization and caries. The purpose of this study was to determine the effect of chlorhexidine (CHX) gel and fluoride varnish versus placebo and control groups on plaque and gingival indices as well as their influence on enamel demineralization prevention in orthodontic patients with fixed appliances...
July 2018: Dental Research Journal
Shirin Shamsolketabi, Monireh Nili
Background: Denture adhesives are used to improve retention, stability, and efficiency of complete dentures. Proper use of denture adhesives has benefits for patients. Evaluating the effect of denture adhesives on efficiency of complete dentures in patients with different alveolar ridges was the purpose of this study. Materials and Methods: This cross-over randomized clinical trials study was conducted on 90 patients who were wearing well fitted complete dentures...
July 2018: Dental Research Journal
Mahtab Memarpour, Fereshteh Shafiei, Faranak Razmjouei, Mina Soltani
Background: The aim of the study was to evaluate the adhesion of Scotchbond Universal Adhesive to primary tooth dentin by measuring shear bond strength (SBS) and observing morphological changes with scanning electron microscopy (SEM). Materials and Methods: In this in vitro study, a total of 60 primary canine teeth were randomly divided into 5 groups ( n = 12). The study groups were (1) Phosphoric acid etching + Adper Single Bond 2 (control), (2) phosphoric acid etching + Scotchbond Universal (etch-and-rinse), (3) Scotchbond Universal (self-etch), (4) phosphoric acid etching + Scotchbond Universal + resin, and (5) Scotchbond Universal + resin...
July 2018: Dental Research Journal
Tânia Adas Saliba, Mariana Martins Ortega, Karimy Kassem Goya, Suzely Adas Saliba Moimaz, Cléa Adas Saliba Garbin
Background: This study aimed to determine the perception of institutionalized (G1) and noninstitutionalized (G2) elderly people on oral health and quality of life (QOL). Materials and Methods: This cross-sectional, exploratory study applied two instruments - the Geriatric Oral Health Assessment Index (GOHAI) and the World Health Organization QOL-Bref (WHOQOL-BREF) - in two cities of the state of Sao Paulo, Brazil. Among the institutionalized elderly, G1 ( n = 150), 50% were not mentally able to answer the questions correctly, 12% did not answer all the questions, and 7...
July 2018: Dental Research Journal
S Dilip, S Srinivas, M N Mohammed Noufal, K Ravi, R Krishnaraj, Anila Charles
Background: The purpose of the study was to evaluate and to compare the shear bond strength (SBS), adhesive remnant index, and surface roughness of the samples bonded after etching with phosphoric acid and erbium, chromium-doped: Yttrium scandium-gallium-garnet (Er, Cr: YSGG) laser. Materials and Methods: In the present analytical/descriptive study, 90 premolars extracted for orthodontic purposes were used, out of which 75 were randomly divided into five groups where five different methods were used to prepare the enamel for bonding; etching with 37% phosphoric acid for 15 s, irradiation with Er, Cr: YSGG laser at 1 watt for 10 s and 20 s, and irradiation with Er, Cr: YSGG laser at 1...
July 2018: Dental Research Journal
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