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Journal of Dentistry

Saede Atarbashi-Moghadam, Ali Lotfi, Saman Salehi Zalani, Sepideh Mokhtari
The rarity of oral soft tissue spindle cell tumors combined with overlapping microscopic patterns can make challenges in their diagnosis and treatment. Oral cavity palisaded encapsulated neuroma is an uncommon lesion which occurs often on the hard palate. It is essential for oral pathologists to be familiar with its histopathology of this lesion is essential since many lesions are probably diagnosed microscopically as neurofibroma or schwannoma. Here, we report a case of oral palisaded encapsulated (solitary circumscribed) neuroma in an unusual site...
December 2017: Journal of Dentistry
Nicholas Egbert, Swati Ahuja, Audrey Selecman, Russell Wicks
Until recently, angled abutments have been the only solution to correcting the trajectory of the emergence profile of labially inclined implants in the maxilla. However, the clinical implications of angled abutments reveal several shortcomings. Newly designed angulated implants with a 12-degree restorative platform angulation are an alternative to angled abutments. The purpose of this article was to report a case utilizing new angulated implants (Co-axis, Keystone dental, Burlington, MA, USA) in the premaxilla thereby facilitating fabrication of a multi-unit implant retained fixed dental prosthesis...
December 2017: Journal of Dentistry
Hassan Mohajerani, Roozbeh Roozbayani, Shahram Taherian, Reza Tabrizi
Statement of the Problem: Despite the low failure rate of dental implants, recognition of the risk factors can enhance the predictability of failure. Purpose: The aim of this study was to evaluate the risk factors for early implant failure. Materials and Method: This retrospective cohort study was conducted on two groups of patients, the patients with a failed implant before loading and those without a failed implant. Age, gender, implant type, implant surface, implant length, bone type, type of surgery (one- or two-stage) and immediate (fresh socket) or delayed placement of implant were the variables to be assessed in this study...
December 2017: Journal of Dentistry
Abolfazl Saboury, Hamid Neshandar Asli, Zahra Dalili Kajan
Statement of the Problem: Precision of the impression taken from implant positions significantly determines accurate fit of implant-supported prostheses. An imprecise impression may produce prosthesis misfit. Purpose: This study aimed to evaluate the accuracy of four impression-making techniques for angulated implants by stereomicroscope through measuring the vertical marginal gaps between the cemented metal framework and the implant analog. Materials and Method: A definitive cast with two 15° mesially angulated implants served as the standard reference for making all the impressions and later for accuracy evaluation...
December 2017: Journal of Dentistry
Fatemeh Jahanimoghadam, Mahsa Kalantari, Azadeh Horri, Habibeh Ahmadipour, Ehsan Pourmorteza
Statement of the Problem: Since almost half of the child abuse cases affect the head and neck region, dentists have an important role in the diagnosis and report of oral and dental aspects of child abuse cases. Purpose: The objective of the current study was to evaluate the knowledge, attitude and practice of the general dentists and pedodontists regarding child abuse and child neglect. Materials and Method: This cross-sectional study was carried out on the participants of the 12th congress of pedodontists of Iran...
December 2017: Journal of Dentistry
Masoud Khabiri, Maziar Ebrahimi, Mohammad Reza Saei
Statement of the Problem: File fracture can interfere with cleaning and shaping of the canal and compromise periradicular healing. Autoclave sterilization may prone the files to fracture. Purpose: The purpose of the present study was to determine the effect of autoclave sterilization on the cyclic fatigue resistance of Hero642 rotary instrument in two curvatures of 45 and 60 degrees. Materials and Method: For this experimental in-vitro study, 90 Nickel-Titanium HERO 642 rotary files #30 with 0...
December 2017: Journal of Dentistry
Rasoul Gheisari, Hesamuddin Eatemadi, Akram Alavian
Statement of the Problem: Dental implant is one of the best choices for reconstruction of aesthetic and function. High success rate of these treatments are related to some considerations such as case selection, implant system selection and surgical methods. One-stage or two-stage surgical approaches are routine surgical methods in dental implant treatments. The minimum rate of bone loss around fixtures is the most important criteria for evaluation of implant treatment success that can be affected by different methods of surgery...
December 2017: Journal of Dentistry
Yasmin Sheikh Hasani, Mehrsa Paryab, Aida Saffarpour, Mohammad Javad Kharazifard, Mehdi Shahrabi
Statement of the Problem: There are some concerns regarding the effect of chlorhexidine (CHX) applied for cavity disinfection on the bond strength of adhesive restorations to dentin. Purpose: This study sought to assess the effect of CHX on the shear bond strength (SBS) of Equia resin-modified glass ionomer cement (RMGIC) to dentin in permanent teeth. Materials and Method: In this experimental study, the buccal surface of 84 freshly extracted human premolars was ground to expose the flat dentin...
December 2017: Journal of Dentistry
Zohreh Jaafari-Ashkavandi, Behrooz Akbari
Statement of the Problem: It is necessary for surgeons and practitioners to know about relative incidence and clinicopathologic features of lesions for accurate diagnosis and approach of pathologic lesions. Data are limited about overall incidence of intra-osseous lesions of the jaws in Iranian patients. Purpose: This study evaluated the clinicopathologic features of intra- osseous lesions of the jaws in an Iranian population, in a 22-year period. Materials and Method: In this cross- sectional retrospective analytical study, 4500 specimens in a 22- year period were reviewed...
December 2017: Journal of Dentistry
Abdolhamid Zafarmand, Maryam Asvar
Statement of the Problem: Lifestyle has a key role in having a life with quality. This is much more critical in academic community. Elite students are the scientific capital of each community; therefore, improvement of their life-style is a very crucial issue and is a way of esteeming them. Purpose: This study was aimed to scrutinize the life-style of elite dental students to provide a guideline for healthy life-style for their own and for other students, as well...
December 2017: Journal of Dentistry
Leila Khojastepour, Abdolaziz Haghnegahdar, Marzieh Keshtkar
Statement of the Problem: The surgical procedure of dental implantation in anterior maxillary area may be limited by the shape and size of nasopalatine canal (NPC). CBCT imaging provides three-dimensional information for surgical planning. Purpose: This study is designed to evaluate the anatomy of NPC in a selected Iranian population. Materials and Method: In this cross sectional study, CBCT images of 301 patients were evaluated for NPC characteristics...
December 2017: Journal of Dentistry
Tahereh Nosratzehi
Squamous cell carcinoma of oral cavity is of malignant tumors, which causes cancerous complications. DNA damage, mainly because of products of oxidative stress like reactive oxygen species, is a frequent mutagenic that triggers carcinoma. Smoking increases the probability of cancer incidence. Saliva is the first biological medium to interact with external compounds, especially smoking substances. The present study overviews the salivary level of some remarkable compounds in relation with smoking and squamous cell carcinoma...
December 2017: Journal of Dentistry
Fatemeh Mashhadiabba, Nafiseh Shamloo, Mehdi Jafari, Shahla Vafadar
Ameloblastic fibro-odontoma is a relatively rare, benign odontogenic tumor that usually occurs in children and adolescents with unerupted teeth. This article reports an ameloblastic fibro-odontoma in the anterior mandible as a "bump on her gum" in a 7-month-old girl. This is the first case under 9 months old reported to date. Radiographic and histologic findings as well as the treatment are discussed.
September 2017: Journal of Dentistry
Parviz Deyhimi, Sayed Mohammad Razavi, Shirin Shahnaseri, Saeedeh Khalesi, Solmaz Homayoni, Payam Tavakoli
Primary oral melanomas are uncommon malignant neoplasm of melanocytes origin. The most common site of oral melanoma is maxillary gingiva and hard palate. Oral mucosal melanoma exhibit a pathobiological behavior and clinical features different from cutaneous melanomas. Oral melanomas are often clinically silent which may consequently result in delayed diagnosis; thus, making the prognosis extremely poor. This case report presents clinical, histopathological and immunohistochemical features of two cases of advanced oral melanoma, one pigmented or melanotic melanoma in a 46-year-old female and another amelanotic melanoma in a 59-year-old male patient, with chief complaint of swelling in oral mucosa...
September 2017: Journal of Dentistry
Amir Jalal Abassi, Abdolreza Mohamadnia, Seyed Alireza Parhiz, Nahid Azizi Moghadam, Naghmeh Bahrami
STATEMENT OF THE PROBLEM: Evidence shows thiabendazole has the potential to inhibit angiogenesis in melanoma and fibrosarcoma; however, its effect on oral squamous cell carcinoma has not been previously studied. PURPOSE: This study sought to assess the cytotoxic effects of thiabendazole on HN5 head and neck squamous carcinoma cell line. MATERIALS AND METHOD: HN5 cell lines were exposed to different concentrations of thiabendazole (prepared from 99% pure powder) for 24, 48 and 72 hours...
September 2017: Journal of Dentistry
Hajar Attarzadeh, Fatemeh Kebriaei, Leyli Sadri, Elnaz Foroughi, Mehdi Taghian
STATEMENT OF THE PROBLEM: School is one of the places with the greatest prevalence of occurrence of traumatic dental injuries. PURPOSE: The aim of this study was to assess the knowledge levels and attitudes of elementary school teachers towards dental trauma and its management. MATERIALS AND METHOD: In this cross-sectional study, 281 elementary school teachers were selected through cluster sampling to answer the prepared questionnaire. The data obtained from the questionnaires were analyzed in SPSS software by using ANOVA test and t-test...
September 2017: Journal of Dentistry
Fahimeh Rezazadeh, Rahele Ebrahimi, Azadeh Andisheh-Tadbir, Mohammad Javad Ashraf, Bijan Khademi
STATEMENT OF THE PROBLEM: Squamous cell carcinoma (SCC) is the most frequent oral cancer whose 5-year survival rate is 80% for early-detected lesions and nearly 30-50% for advanced lesions. Early detection of oral cancers and precancerous lesions can improve the patient's survival and decrease the morbidity. PURPOSE: This study aimed to evaluate and compare the Ki-67 and MCM3 expression in cytologic smear of oral SCC (OSCC). MATERIALS AND METHOD: We examined 48 oral brush biopsies including 28 OSCC and 20 healthy non-smoking samples...
September 2017: Journal of Dentistry
Zahra Ghoncheh, Yasaman Kheirandish, Hanieh Kaviani, Mohammad Javad Kharazi Fard, Kurosh Sadeghi
STATEMENT OF THE PROBLEM: Considering the high diagnostic accuracy and wide dynamic range of photostimulable phosphor plates (PSPs), they can be a good alternative for radiographic films. PURPOSE: This study was aimed to assess the effects of delay in scanning PSPs on the diagnostic accuracy of detection of approximal caries. MATERIALS AND METHOD: Radiographs from fifty-two extracted molar and premolar teeth were radiographed using DIGORA PSP (Soredex Corporation, Helsinki, Finland)...
September 2017: Journal of Dentistry
Shabnam Ajami, Hamidreza Pakshir, Hedyeh Samady
STATEMENT OF THE PROBLEM: Individuals with oral clefts exhibit considerably more dental anomalies than individuals without clefts. These problems could initially be among the symptoms of their disease and/or they may be the side effect of their treatments. Pushback palatoplasty could cause some interference during the development of teeth and result in tooth defects. PURPOSE: The study was performed to assess the prevalence and characteristics of developmental dental anomalies in orofacial cleft patients who attended Shiraz Orthodontics Research Center-Cleft Lip and Palate Clinic...
September 2017: Journal of Dentistry
Fahimeh Rezazadeh, Khadijeh Hajian, Shoaleh Shahidi, Soraya Piroozi
STATEMENT OF THE PROBLEM: Temporomandibular disorder (TMD) is a clinical term used for clinical signs and symptoms that affect the temporomandibular joints, masticatory muscles, and associated structures. Surgical and non-surgical treatments can be used for management of TMD. Non-surgical route is the main part of the treatment, since clinicians prefer non-aggressive treatment for TMD such as pharmacological and physical therapy. Low-level laser therapy (LLLT) and transcutaneous electrical nerve stimulation (TENS) are the main procedures in physical therapy...
September 2017: Journal of Dentistry
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