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Search Results: 1 - 10 of 198056 matches for " Eshghyar N "
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Primary Hyperparathyroidism. Statistical Study about Patient to bed in Imam Khomeiny and Shariaty Hospitals (67-1376 Years)
Eshghyar N,Kafie N
Journal of Dental Medicine , 1998,
Abstract: In this study we try to clear the prevalance of age and sex and clinical and radiographic"nmanifestations of primary hyperparathyroidism. In this duration 47 patients with primary"nhyperparathyroidism that bed in two important hospitals in Tehran were studied."nThe ratio between women to men was 7 to 1 and most prevalance of disease were in fouyth decade. The pain boon was the cheif complain of patients and osteopenia was the most radiographic findings."nIn addition a case of primary hyperparathyroidism with mandibular and other bone involvement was reported.
Chondrosarcoma, A 30 Year Retrospective Study in Cancer Institute Imam Khomeini Hospital and Faculty of Dentistry of Tehran University of Medical Sciences
N. Eshghyar,Mohebbi
Journal of Dentistry of Tehran University of Medical Sciences , 2004,
Abstract: Statement of Problem: Chondrosarcoma is a tumor which includes 10 percent of the bone primary tumors. Its prevalence is half of the osteosarcoma and two times of Ewing’s. The mean age of the patients ranges between 30-50 years of old. There is no significant sex orrace predilection. The most common complaint is the presence of a painless and enlarging mass. Its clinical course is described as slow-growing lesion with local invasion and recurrence, no or delayed metastasis, almost long survival.Purpose: The aims of this study were as follows: the determination of prevalence of reported Chondrosarcoma in cancer institute Imam Khomeini hospital and faculty of dentistry of Tehran University of medical sciences, comparison of jaw Chondrosarcoma to the body one, evaluation of sex, age, clinical and histological parameters and prevalence of different locations in body.Materials and Methods: In this study the biopsy notes of all kinds of chondrosarcoma of the body in cancer institute (212 cases) and the extracted files of the patients with the jaws chondrosarcoma in cancer institute and department of oral pathology of faculty of dentistry,University of Tehran medical sciences (23 Cases) were evaluated.Results: In this retrospective statistical study the proportion of the patients with the jaws conventional chondrosarcoma to the patients with conventional Chondrosarcoma of the body was 8.57%. The mean age of the total patients and the patients with jaws chondrosarcoma were 36.21 and 38.87 years, respectively. Men were somehow more involved. Pelvic was the most common location of the tumor. Maxilla involvement was 3-4 times more than mandible. Microscopic manifestation and tumor grading suggested a lowgrade lesion in jaws. Local recurrence in jaws was 33.3%.Conclusion: The most common site of involvement of chondrosarcoma was pelvic and maxillary involvement was more common than mandible. Its prevalence was in the posterior site of the jaws.
The Prevalence of Pemphigus (Razi Hospital and Department of Oral Pathology, Tehran University of Medical Sciences)
Eshghyar N,Eilanbo A
Journal of Dental Medicine , 1999,
Abstract: The aim of this retrospective statistical study was to determine the prevalcence and frequency of"nage and sex distributions of pemphigus disease. Pemphigus disease classified as autoimmune bullous"ndermatoses which is a chronic mucocutaneous disease."nThis study was performed in Razi Hospital and department of oral pathology of dental school, Tehran"nUniversity of Medical Sciences. The most frequently effected area was buccal moucosa of oral cavity. The"nmost rate of recurrence was found in oral cavity which being more common in middle age females (25-44"nyears).
Odontogenic keratocyst: a 31- year retrospective study in the oral and maxillofacial pathology department, Faculty of Dentistry, Tehran University of Medical Sciences
Eshghyar N.,Jalayer Naderi N.,Sarraf P
Journal of Dental Medicine , 2005,
Abstract: Statement of Problem: Odontogenic keratocyst is a developmental odontogenic cyst which arises from dental lamina. One of the important features of odontogenic keratocyst is strong tendency to recurrence. Purpose: The purpose of this study was the statistical evaluation of age and gender of patient as well as area of involvement in odontogenic keratocysts in the oral and maxillofacial pathology department of dental faculty of Tehran University of Medical Sciences from 1971-2002. Materials and Methods: This study was a cross sectional, descriptive one. Medical records were reviewed and variables such as age, gender and site of involvement were recorded. The data were analyzed with SPSS software. Results: The relative frequency of odontogenic keratocyst was 36%. 66% of cysts were in men and 34% in women. 68% of lesions affected the lower jaw and 32% the upper jaw. Regarding the site of involvement, 48% of lesions involved the molar region of mandible and 42%, the anterior part of maxilla. The occurrence of keratocysts was higher in this sites. Most of the cases were diagnosed in the third decade. Conclusion: Based on the findings of this study, odontogenic keratocyst was more prevalent in men, mandible and the third decade. The posterior part of mandible and anterior region of maxilla were involved most frequently.
Nasopharengial Angiofibroma in the Oral Cavity in a 50-year-old Man: A Case Report
Bakhshi M.,Basir Shabestari S.,Eshghyar N.
Journal of Dentistry , 2011,
Abstract: The angiofibroma is a rare benign vascular tumor that often occurs in the nasopharyn and paranasal sinuses in male adolescents. Presentation of this lesion in the oral cavity is very rare. This paper presents the case of a-50-year old male with an angiofibroma on the buccal mucus as exophytic lesion with red-brown color which had grown during 8 years. Based on the clinical findings, working diagnosis was mesenchymal tumor. After excisional biopsy, histopathologic feature proved to be angiofibroma.
Evaluation of microvascular densityby CD34 in squamous cell carcinoma of the tongue and its relationship with cervical lymph node metastasis
Eshghyar N.,Motahhary P.,Rahrotaban S.
Journal of Dental Medicine , 2009,
Abstract: "nBackground and Aim: Angiogenesis plays a central role for development and progression of malignant tumors.It is considered as an important factor for predicting of malignant tumor's behavior such as metastasis to lymph nodes and other clinicopathologic factors. However , it is still a controversial factor especially in oral squamous cell carcinoma.The aim of this study was to evaluate the correlation between angiogenesis and clinicopathologic parameters such as presence of metastatic cervical lymph node in the tongue squamous cell carcinoma. "nMaterials and Methods: In this cross-sectional study, 40 cases of squamous cell carcinoma of the tongue were selected from the archive of cancer institute of Tehran University of Medical Science. Sections were prepared from paraffin blocks and immunohistochemically stained with antibody against CD34. Stained vessels were counted in 4 fields ,the most vascular areas at low magnification, in each areas of intratumoral ,peritumoral and nontumoral adjacent tissue in two groups with metastatic lymphnodes (N+) and without (N-). The average counts from the four most vascular areas were recorded as the mean microvascular density (MVD). Data were analyzed by 3wayANOVA and Independent T- test with p<0.05 as the level of significance. "nResults: High mean MVD-CD34 was significantly correlate with positive cervical lymph node metastasis in intra tumoral and peritumoral areas but there was no significant correlation between mean MVD-CD34 and age, gender, and differentiation of tumor. "nConclusion: Based on the results of this study, CD34 can help us to determine the presence of cervical lymph node metastasis and may also determine the outcome of a primary squamous cell carcinoma of the tongue.
CALCIFYING ODONTOGENIC CYST:AN ANALYSIS OF THIRTY-SIX CASES
N. Eshghyar,N. Jalayer-Nadery R. Ashery
Acta Medica Iranica , 2006,
Abstract: The term calcifying odontogenic cyst (COC) was first introduced by Gorlin in 1962. COC occurs mainly as an intra-osseous lesion in mandible or maxilla but the peripheral variation of COC has also been reported. The confusion about COC nature as cyst or tumor has not been resolved and a vast diversity has been shown in clinicopathologic aspects of COC. The purpose of this study was the review and analysis of COC variables such as age, gender and location and reclassification of histopathologic features of cases. The study was a retrospective review, cross sectional and case series one. The records of 36 patients were obtained and the clinical characteristics such as age, gender and location of COC were registered. The histopathologic features of cases were reviewed and reclassified. The data showed that 38.3% of cases occurred in the fifth decade and beyond; 67.6% were in males and 32.4% in females. Considering location, 51.5% of COCs were found in mandible and 48.5% in maxilla; 65.6% were located in posterior part of jaws. Of the 36 cases diagnosed as COC, 32 (88.8%) had cystic features and 4 (11.11%) were tumoral. For better determination of histopathologic and biologic features of COC, more investigations are needed.
An in-vitro comparison of canal debridement efficiency between three systems of Rotary, Reciprocal and Vertical
Sheykhrezaee MS.,Eshghyar N.,Farzaneh B.,Ashofteh Yazdi K.
Journal of Dental Medicine , 2004,
Abstract: Statement of Problem: Total removal of tissues and remnant microorganisms as well as canal shaping are the essential objectives of endodontic therapy. A successful endodontic treatment is obtained through Shilder’s principals, however; complete observation of this technique using stainless steel files manually is problematic and time-consuming. Modern technology, in order to eliminate such problems, has presented new facilities such as Nickel-Titanium (NiTi) files and engine driven instruments. Purpose: The aim of this in-vitro study was to compare the canal debridement efficiency of three engine driven instruments: Rotary, Reciprocal and Vertical. Materials and Methods: In this experimental study, 60 mesial roots of human first and second mandibular molars were divided into three groups randomly. In each sample, one canal was considered as case, the other one as control. Files used in Reciprocal and vertical groups were of handy Ni-Ti type and in rotary group, rotary Ni-Ti files were used. After debridement, the roots were sectioned at 3mm and 5mm from anatomic apex, stained and examined under light microscope. Comparison criteria between case and control groups were based on residual debris and predentin and the level of root canal preparation and shaping after debridement. Data were subjected to kruskal-Wallis non-parametric test. Results: There was no significant difference between the efficiency of debridement at 3mm and 5mm sections between all groups. But difference in time consumption was significant ranked from the shortest to the longest as rotary, reciprocal and vertical. Conclusion: The efficiency of debridement between the three automated instruments was approximately equal, however; the instrumentation time was different between three groups. Rotary system was the fastest one, as compared with reciprocal (second) and vertical (last). It may be concluded that rotary system has a superiority over the other two groups in conventional root canal therapies.
Immunohistochemicai study of Ki- 67 expression in unicystic Ameloblastoma and Dentigerous cyst
Eslami M.,Eshghyar N.,Tirgari F.,Rezvani G.
Journal of Dental Medicine , 2004,
Abstract: Statement of Problem: Differentiation of dentigerous cyst from unicystic ameloblastoma, discovering any initial ameloblastic changes in lining epithelium of dentigerous cyst at early stage, and differentiation between hyperplastic odontogenic epithelium in fibrous capsule of dentigerous cyst from ameloblastic proliferation, need to an accurate and reliable technique."nPurpose: The aim of this study was to determine and compare Ki-67 immunoreactivity in various locations of the epithelium of Dentigerous cyst and Unicystic Ameloblastoma."nMaterials and Methods: In this historical Cohort study, 15 cases of dentigerous cyst and 9 cases of unicystic ameloblastoma were selected. Immunohistochemistry staining was performed by M1B-1 (murine monoclonal antibody against Ki-67). The stained nucleous were counted in basal and suprabasal layer of lining epithelium of both lesions in 3000 epithelial cells. Finally, the percentage of positive cells (presented as labeling index) was calculated, t- student test was used to analyze the related data."nResults: Ki-67 (LI) in basal layer of Dentigerous cyst (2.59±1.66) and Unicystic Ameloblastoma (3.76±79) had no significant differences, but Ki-67 (LI) in suprabasal layer of unicystic ameloblastoma (2.15±0.69) was significantly higher than dentigerous cyst (0.77±0.55) P=0.003)."nThe difference between the average numbers of positive cells for Ki-67 (LI) in these two lesions was statistically significant (P<0.05) and it was higher in Unicystic Ameloblastoma than Dentigerous cyst."nConclusion: Based on the findings of this study, it is suggested that Ki-67 (LI) in suprabasal layer or throughout the epithelium can be considered as a useful marker for differential diagnosis between dentigerous cyst and unicystic ameloblastoma.
Immunohistochemical expression of progesterone receptors in adenoid cystic carcinoma and pleomorphic adenoma of salivary glands
Eslami M,Eshghyar N,Ensani F,Seifi S
Journal of Dental Medicine , 2006,
Abstract: Background and Aim: The hormone receptor status in breast cancer has been pivotal in determining the likelihood of response to hormonal manipulation. Tumors which are both estrogen and progesterone receptor positive are much more likely to respond to anti-hormone therapy than negative tumors. There is well-established similarity between breast tissue and salivary glands. The aim of this study was to evaluate the progesterone receptor expression in pleomorphic adenoma and adenoid cystic carcinoma of salivary glands. Materials and Methods: In this descriptive study, immunohistochemical staining with progesterone antibody was performed on 14 pleomorphic adenoma (PA) and 15 adenoid cystic carcinoma (ACC) paraffin blocks. The percentage of positive cells was determined using an eye piece graticule. Immunoreactivity was categorized as either positive (reactivity more than 5%) or negative (reactivity less than 5%). In addition the existence of progesterone receptor in tumor cells, stromal cells (fibroblasts), inflammatory cells and salivary glands around tumors was evaluated. Data were analyzed with T and Mann Whitney U tests with p<0.05 as the limit of significance. Results: Immunohistochemical staining for progesterone receptor was negative in 15 ACC and 13 PA. Only one case of PA showed immunoreactivity for progesterone receptor. Also, 12 normal salivary glands around tumor were positive. Inflammatory cells, endothelial cells and fibroblasts did not show immunoreactivity in most cases. Conclusion: The results indicate the lack of progesterone receptor expression in ACC and PA of salivary glands.
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