Shiraz University of Medical Sciences
Journal of Dentistry
2345-6485
15
4
2014
12
01
Image Resolution in the Digital Era: Notion and Clinical Implications
153
155
41607
EN
Vahid
Rakhshan
Iranian Tissue Bank and Research Center, Tehran University of Medical Sciences, Dept. of Dental Anatomy and Morphology, Dental Branch, Islamic Azad University, Tehran, Iran.
Journal Article
2014
01
27
Digital radiographs need additional metadata in order to be accurate when being converted to analog media. Resolution is a major reason of failures in proper printing or digitizing the images. This letter shortly explains the overlooked pitfalls of digital radiography and photography in dental practice, and briefly instructs the reader how to avoid or rectify common problems associated with resolution calibration of digital radiographs.
https://dentjods.sums.ac.ir/article_41607_bd7b26582028f0ea7a51f40d81d7b7e9.pdf
Shiraz University of Medical Sciences
Journal of Dentistry
2345-6485
15
4
2014
12
01
Prevalence of Bifid Mandibular Condyle in a Selected Population in South of Iran
156
160
41606
EN
Abdol Aziz
Haghnegahdar
Dept. of Oral and Maxillofacial Radiology, School of Dentistry, Shiraz university of Medical Sciences, Shiraz, Iran.
Pegah
Bronoosh
Dept. of Oral and Maxillofacial Radiology, School of Dentistry, Shiraz university of Medical Sciences, Shiraz, Iran.
Leila
Khojastepour
Dept. of Oral and Maxillofacial Radiology, School of Dentistry, Shiraz university of Medical Sciences, Shiraz, Iran.
0000-0003-4209-2233
Parissa
Tahmassebi
Undergraduate Student, School of Dentistry, International Branch of Shiraz University of Medical Sciences, Shiraz, Iran.
Journal Article
2014
10
25
Statement of the Problem: Bifid mandibular condyle (BMC) is a rare anomaly of uncertain origin which may play a role in some defects in temporomandibular joints. Since it may be misinterpreted as fractures or tumors in condylar area, proper diagnosis will help to prevent unnecessary treatments. A comprehensive knowledge about BMC may help to understand the developmental course of condyle and temporomandibular joints more clearly.Purpose: The purpose of this study was to estimate the prevalence of bifidity of condyle in a selected population in Iran by employing dental panoramic view.Materials and Method: Panoramic views of 1000 individuals (767 female, 233 male individuals) were assessed for bifidity. The patients were over 18 years old and had attended the radiology department of Shiraz dental school from September 2012 to March 2013.Results: A total of 35(3.5%) case of bifidity was detected. Unilateral form was much more prevalent (32 unilateral cases versus 3 bilateral). The left-side bifidity was 3 times more prevalent than the right side. A large number of bifid condyles (63%) have shown symptoms of temporomandibular joint pain or click or both.Conclusion: The prevalence of bifidity in our population was about 3.5%, which was significantly high compared to the other published reports. Symptoms (click and pain) were also much more detected in our study.
https://dentjods.sums.ac.ir/article_41606_27025d5d86edb8934b3e5630b045c196.pdf
Shiraz University of Medical Sciences
Journal of Dentistry
2345-6485
15
4
2014
12
01
Comparison of Surgical Blade and Cryosurgery with Liquid Nitrogen Techniques in Treatment of Physiologic Gingival Pigmentation: Short Term Results
161
166
41609
EN
Saeed
Rahmati
Periodontist, Isfahan, Iran.
Mansoore
Darijani
Postgraduate Student, School of Dentistry, Mashhad University of Medical Sciences and Health Services, Mashhad, Iran.
Maryam
Nourelahi
Postgraduate Student, Department of Periodontology, School of Dentistry, Shahid Sadooghi Yazd University of Medical Sciences and Health Services, Yazd, Iran.
Journal Article
2014
10
25
Statement of the Problem: Melanin pigmentation of the gingiva is a crucial esthetic problem. A variety of methods have been used for gingival depigmentation.Purpose: The purpose of this study was to compare the results of two treatment modalities: scalpel technique and cryotherapy with liquid nitrogen in treatment of gingival pigmentation.Materials and Method: Twenty patients with chief complaint of gingival pigmentation participated in our study. 10 patients were treated with cryotherapy and remaining 10 participants were undergone the scalpel technique surgery. We evaluated acquiescence and comfort of the patients, degree of depigmentation, based on the area of pigmentation shown by gridlines option in Microsoft Paint software, and the presence or absence of gingival recession before and one month after treatment. Data was analyzed using Mann-Whitney and Chi-Square tests. A significance level of p≤ 0.05 was adopted.Results: Mean value and standard deviation of depigmentation for group A and group B was 96.17±2.51 and 95±2.48, respectively. The difference was not statistically significant (p= 0.225). There was no association between the treatment modality and the gingival recession (p= 0.303) or the treatment modality and the patient satisfaction (p= 0.346). No significant difference was found between gingival recession measures before and after the operation in the two treatment modalities.Conclusion: Surgical blade and cryosurgery with liquid nitrogen had no significant difference in treatment of physiologic gingival pigmentation. Both Techniques are acceptable in the treatment of gingival pigmentation.
https://dentjods.sums.ac.ir/article_41609_b292628c6cd21468f6925959c9420199.pdf
Shiraz University of Medical Sciences
Journal of Dentistry
2345-6485
15
4
2014
12
01
A Clinicopathological Study of Odontogenic Cysts and Tumors in Hamadan, Iran
167
172
41610
EN
Fahimeh
Baghaei
Dept. of Oral and Maxillofacial Pathology, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran.
Massoumeh
Zargaran
Dental Research Center, Dept. of Oral and Maxillofacial Pathology, School of Dentistry, Hamadan University of Medical Sciences Hamadan, Iran.
0000-0002-8843-2590
Hamidreza
Najmi
Dentist, Arak, Iran.
Abbas
Moghimbeigi
Dept. of Biostatistics and Epidemiology, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran.
0000-0002-3803-3663
Journal Article
2014
10
25
Statement of the Problem: Odontogenic cysts and tumors are the most frequent osseous destructive lesions of the jaws; however, there is little information regarding the relative frequency of these lesions among the Iranian population.Purpose: The purpose of this study was to determine the distribution of clinically and histologically- diagnosed odontogenic cysts and tumors during a period of 13 years in Hamadan, and also its correlation with age, gender, and the site of the lesion.Materials and Method: A descriptive cross-sectional study was performed on 413 oral and maxillofacial specimens during 1996 to 2008.The age and the gender of patients, as well as the site of lesion were recorded. The data were analyzed using SPSS software.Results: Totally, 70 specimens were recorded as odontogenic cysts and 11 specimens were diagnosed as odontogenic tumors. The most frequent odontogenic cysts were dentigerous cysts (27.2%), followed by radicular cysts (18.6%) and odontogenic keratocysts (18.6%). In addition, cysts were more frequent in male than female individuals. Ameloblastoma was the most frequent odontogenic tumor (64%).Conclusion: Odontogenic cysts were in correlation with age, gender and location. These results showed that dentigerous cyst and odontogenic keratocyst were more frequent than other studies. More investigations should be performed to determine the frequency of odontogenic tumors in Iran.
https://dentjods.sums.ac.ir/article_41610_763d4a635bab569f726324f992c0df41.pdf
Shiraz University of Medical Sciences
Journal of Dentistry
2345-6485
15
4
2014
12
01
Root-Crown Ratio in Permanent Dentition Using Panoramic Radiography in a Selected Iranian Population
173
179
41611
EN
Sina
Haghanifar
Dept. of Oral and Maxillofacial Radiology, School of Dentistry, Babol University of Medical Sciences, Babol, Iran.
0000-0001-5949-8913
Ehsan
Moudi
Dept. of Oral and Maxillofacial Radiology, School of Dentistry, Babol University of Medical Sciences, Babol, Iran.
Shirin
Abbasi
General Dental Practitioner, Private Practice, Babol, Iran.
Ali
Bijani
Noncommunicable Pediatric Diseases Research Center, Babol University of Medical Sciences, Babol, Iran.
0000-0003-2233-8726
Arash
Poorsattar Bejeh Mir
Dental Materials Research Center, School of Dentistry, Babol University of Medical Sciences, Babol, Iran.
Nafiseh
Ghasemi
Dental Materials Research Center, School of Dentistry, Babol University of Medical Sciences, Babol, Iran.
Journal Article
2014
10
26
Statement of the Problem: Determining the crown-root ratio is crucial in many dental clinical decisions. There are no reliable data presented for Iranian population.Purpose: The aim of this study was to assess the root-crown ratio of permanent teeth with regards to the relationship of gender and jaw type using panoramic radiographs. The reliability of method was also assessed.Materials and Method: The crown and root lengths of teeth were measured by a digital caliper on panoramic radiographs of 185 individuals except for the third molars. A total of 1994 teeth was studied and 50.8% of the teeth belonged to males and 49.2% belonged to females. The modified Lind method was applied.Results: The highest mean root-crown ratios in both arches of both genders were obtained in the second premolars, followed by the first premolars and canines. In both genders, the lowest root-crown ratios were found in the maxillary central incisors. In male patients, the mean root-crown ratio was higher (p= 0.003) than that of females. Using Bland-Altman analysis, a non-significant difference of 0.006 (95% CI: -0.012-0.024) and 0.0002 (95% CI: -0.011-0.011) were found for intra-observer and inter-observer agreement, respectively.Conclusion: Assessment of the root-crown ratio in permanent dentition could be performed on panoramic radiographs with acceptable reproducibility in an Iranian Population. Considering observed differences, our findings suggest that for the accurate assessment, this ratio must be calculated for male and female patients and also for the upper and lower jaws, separately.
https://dentjods.sums.ac.ir/article_41611_108d50666a26ba71584ca152f4b8b568.pdf
Shiraz University of Medical Sciences
Journal of Dentistry
2345-6485
15
4
2014
12
01
Relationship between Body Mass Index, Skeletal Maturation and Dental Development in 6- to 15- Year Old Orthodontic Patients in a Sample of Iranian Population
180
186
41612
EN
Zohreh
Hedayati
Orthodontic Research Center, Dept. of Orthodontic, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Fatemeh
Khalafinejad
Post Graduate Student, Orthodontic Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Journal Article
2014
10
26
Statement of the Problem: The prevalence of overweight and obesity has been increasing markedly in recent years. It may influence growth in pre pubertal children.Purpose: The purpose of this study was to determine whether increased Body Mass Index (BMI) is associated with accelerated skeletal maturation and dental maturation in six to fifteen years old orthodontic patients in Shiraz, Iran.Materials and Method: Skeletal maturation and dental development of 95 orthodontic patients (65 females and 30 males), aged 6 to 15 years, were determined. Dental development was assessed using the Demerjian method and skeletal maturation was evaluated by cervical vertebral method as presented by Bacetti. The BMI was determined for each patient. T-test was applied to compare the mean difference between chronologic and dental age among the study groups. A regression model was used to assess the relationship between BMI percentile, skeletal maturation, and dental development.Results: 18.9% of subjects were overweight and obese. The mean differences between dental age and chronologic age were 0.73±1.3 for underweight and normal weight children and 1.8±1.08 for overweight and obese children. These results highlighted the correlation between accelerated dental maturity and increasing BMI percentile (p= 0.002). A new formula was introduced for this relationship. There was not any significant relationship between BMI percentile and skeletal maturation.Conclusion: Children who were overweight or obese had accelerated dental development whereas they did not have accelerated skeletal maturation significantly after being adjusted for age and gender.
https://dentjods.sums.ac.ir/article_41612_fbd30e5222ac80bbd61c016f8649dde0.pdf
Shiraz University of Medical Sciences
Journal of Dentistry
2345-6485
15
4
2014
12
01
Can the Follicle-Crown Ratio of the Impacted Third Molars be a Reliable Indicator of Pathologic Problem?
187
191
41613
EN
Sina
Haghanifar
Dept. of Oral & Maxillofacial Radiology and Dental Material Research Center, School of Dentistry, Babol University of Medical Sciences, Babol, Iran.
0000-0001-5949-8913
Ehsan
Moudi
Dept. of Oral & Maxillofacial Radiology and Dental Material Research Center, School of Dentistry, Babol University of Medical Sciences, Babol, Iran.
Maryam
Seyedmajidi
Dept. of Oral & Maxillofacial Pathology and Dental Material Research Center, School of Dentistry, Babol University of Medical Sciences, Babol, Iran.
Mohammad
Mehdizadeh
Dept. of Oral & Maxillofacial Surgery and Dental Material Research Center, School of Dentistry, Babol University of Medical Sciences, Babol, Iran.
Kamran
Nosrati
Dept. of Oral & Maxillofacial Surgery and Dental Material Research Center, School of Dentistry, Babol University of Medical Sciences, Babol, Iran.
Naghi
Abbaszadeh
Oral & Maxillofacial Radiologist, Babol, Iran.
Ali
Bijani
General Practitioner, Non-Communicable Pediatric Diseases Research Center, Babol University of Medical Sciences, Babol, Iran.
0000-0003-2233-8726
Hakimeh
Ghorbani
Dept. of Oral & Maxillofacial Radiology and Dental Material Research Center, School of Dentistry, Babol University of Medical Sciences, Babol, Iran.
0000-0002-2952-3273
Journal Article
2014
10
26
Statement of the Problem: The presence of impacted third molars in the jaws is a common finding in the routine dental examination of patients. Concerning the odontogenic components of the dental follicle, it can be the origin of different types of odontogenic cysts and tumors.Purpose: The aim of this study was to find feasible radiographic criteria to help differentiate between normal and pathological dental follicles.Materials and Method: 134 asymptomatic impacted third molars were recruited in this study. Then, based on the radiographic measurements, the ratio between the diameter of the dental follicle and the mesiodistal width of the tooth crown was calculated. After surgical removal of impacted third molars, the related dental follicles were evaluated histopathologically. Statistical analyses were performed by adopting chi-square test, t-test, receiver oprating characteristic (ROC) curve, and logistic regression using SPSS-19 software.Results: The mean ratio of the dental follicle’s diameter to the mesiodistal width, in the normal and cystic follicle group was 1.18 ± 0.07 and 1.18 ± 0.08, respectively. There was no statistically significant difference between this ratio and the histopathological evaluation. Based on the logistic regression analysis, only the age >20 years and inflammation had predictive value in identifying cystic changes in dental follicle.Conclusion: According to the findings of the current study, the ratio of dental follicle diameter to the mesiodistal width of the teeth cannot not be employed as a diagnostic index to differentiate between normal and pathological dental follicle.
https://dentjods.sums.ac.ir/article_41613_9eea4bf0c21b9afe12d273561a826862.pdf
Shiraz University of Medical Sciences
Journal of Dentistry
2345-6485
15
4
2014
12
01
An Immunohistochemical Survey to Evaluate the Expression of CD105 and CD34 in Ameloblastoma and Odontogenic Keratocyst
192
198
41614
EN
Shokoofeh
Jamshidi
Dental Research Center, Dept. of Oral and Maxillofacial Pathology, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran.
0000-0002-0646-1882
Massoumeh
Zargaran
Dental Research Center, Dept. of Oral and Maxillofacial Pathology, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran.
0000-0002-8843-2590
Fahime
Baghaei
Dept. of Oral and Maxillofacial Pathology, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran.
Setareh
Shojaei
Dept. of Oral and Maxillofacial Pathology, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran.
Reza
Zare Mahmoodabadi
Dental Research Center, Dept. of Oral and Maxillofacial Pathology, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
Arash
Dehghan
Dept. of Pathology, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.
Abbas
Moghimbeigi
Modeling of Noncommunicable Disease Research Center, Dept. of Biostatistics and Epidemiology, School of Public Health, Ham-adan University of Medical sciences, Hamadan, Iran.
0000-0002-3803-3663
Journal Article
2014
10
26
Statement of the Problem: Ameloblastoma is the most common odontogenic tumor which is slow-growing, locally invasive and exhibit specific biologic behavior and high recurrence rate. Likewise, odontogenic keratocyst is a developmental odontogenic cyst that has a high recurrence rate and aggressive behavior. There are limited studies considering the relationship between the angiogenesis factors and the biologic behavior of these lesions.Purpose: the aim of this study was to evaluate the mean density of vessels in odontogenic keratocysts and ameloblastoma and investigate its possible relationship with biological behavior of these lesions.Materials and Method: In this descriptive-analytic cross-sectional study, 40 cases, comprising 10 odontogenic keratocysts and 30 ameloblastomas (10 plexiform, 10 follicular, and 10 unicystic type) were selected and were stained immuno-histochemically with CD34 and CD105. The micro vessel density was assessed and compared in all groups. T- test for the independent samples’ One- way Anova, Wilcoxon test and Tukey tests were adopted for statistical analysis.Results: A statistically significant difference was observed in mean vascular density (MVD) between the odontogenic keratocyst and ameloblastoma groups concerning the CD105 and CD34 markers (p= 0.005, p= 0.000, respectively). The MVD was significantly higher in ameloblastomas than odontogenic keratocyst. MVD with CD34 was significantly higher than MVD with CD105 in ameloblastomas (p= 0.00).Conclusion: It can be suggested that angiogenesis might be one of the mechanisms that is more possible to contribute the aggressive biological behaviors in ameloblastoma rather than odontogenic keratocyst.
https://dentjods.sums.ac.ir/article_41614_cfa44659320aec2a39cc60b20986b411.pdf
Shiraz University of Medical Sciences
Journal of Dentistry
2345-6485
15
4
2014
12
01
Serum Level of Matrix Metalloproteinase-9 in Patients with Salivary Gland Tumor
199
203
41615
EN
Maryam
Mardani
Dept. of Oral Medicine, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
0000-0003-0479-7291
Azadeh
Andisheh-Tadbir
Dept. of Oral and Maxillofacial Pathology, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
0000-0001-5802-0512
Bijan
Khademi
Dept. of Otolaryngology, Khalili Hospital, Shiraz Institute for Cancer Research, Shiraz University of Medical Sciences, Shiraz, Iran.
Peyman
Biparva
Undergraduate Student, Student Research Committee, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Mahyar
Malekzadeh
Shiraz Institute for Cancer Research, Shiraz University of Medical Sciences, Shiraz, Iran.
Journal Article
2014
10
26
Statement of the Problem: Matrix metalloproteinases (MMPs) have been implicated in the pathogenesis of certain diseases and cancers via tissue destruction and can be secreted into the blood stream. MMP9 expression in the salivary gland tissue was evaluated but their serum level in the salivary gland tumors was not studied.Purpose: The aim of our study was to determine the concentration of serum MMP-9 in healthy participants and in patients with salivary gland tumor.Materials and Method: Using an ELISA kit, the circulating levels of MMP-9 in sera from 58 patients with salivary gland tumor (31 pleomorphic adenoma, 17 adenoid cystic carcinoma and 10 mucoepidermoid carcinoma) and 30 healthy controls was assessed.Results: The serum MMP9 level in patients with salivary gland tumors (380.0±301.3 pg/ml) also patients with benign tumors (354.3±218.7 pg/ml) (354.3±218.7 pg/ml) were significantly lower than that in the healthy group (727.4±624.6 pg/ml) (Respectively p= 0.02 and p= 0.01). Mean serum MMP9 concentration in malignant tumors was (402.3±441.8pg/ml) higher than benign tumors (354.3±218.7 pg/ml) but the difference was not significant (p= 0.9).Conclusion: Our results showed that serum level of MMP9 decreased in patients with salivary gland tumors which suggest that MMP9 may not have a potential role in development and pathogenesis of salivary gland tumor.
https://dentjods.sums.ac.ir/article_41615_363cee9da0d872f7b83f52af38b4d5d9.pdf
Shiraz University of Medical Sciences
Journal of Dentistry
2345-6485
15
4
2014
12
01
Endodontic Treatment of a Maxillary Lateral Incisor with Two Roots; A Case Report with 6 Months Follow-Up
204
207
41608
EN
Atefeh
Hoseini
Dept. of Endodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
Abbas
Abbaszadegan
Dept. of Endodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
0000-0003-4637-3550
Journal Article
2014
10
26
Maxillary lateral incisors are widely known to be single rooted with one root canal, although rare cases with root canal variations are being reported in many populations, the reports regarding Iranian population is extremely limited. In this report, we are presenting the endodontic treatment of a double rooted maxillary lateral incisor. These rare root-canal variations should be considered in pretreatment evaluations by clinicians who perform endodontic treatments.
https://dentjods.sums.ac.ir/article_41608_84595fdabdbc02c7b85066ca0cc5e4d5.pdf