Showing 22 results for فک
Ehsan Moudi, Mohammad Mehdizadeh, Sina Haghanifar, Maryam Sheikhi, Ali Bijani,
Volume 2, Issue 2 (9-2013)
Abstract
Introduction: The purpose of this study was to determine the accuracy of panoramic radiograph in locating the position of lingula as an index to estimate the location of mandibular foramen.
Methods: The distance measurement in this study was carried out on 30 dry mandibles, composed of at least 2 first molars and one canine. Photography and panoramic radiography of the mandible was performed in a steady reproducible position. 10 lines (including 2 horizontal and 8 vertical) were drawn from the lingula to the anterior and posterior borders of ramus, the coronoid process and the lower border of the mandible. These lines were measured and compared in photographs and panoramic radiographs. The data were analyzed using SPSS 20 software, paired t-test, Pearson correlation and linear regression analysis.
Results: Considering all different distances, there was no significant difference between the findings of panoramic radiographs and photographs with regard to 3 indices as follows: Cd (posteroinferiormostpoint of mandibular foramen to the posterior border of the mandible) In (5 mm behind the postero inferior most point of mandibular foramen to the lower border of mandible) gh( 5 mm ahead of superior most point of mandibular foramen to the coronoid notch) Whereas, a significant difference was observed in other indices.
Conclusions: It seems that the Panoramic radiograph is an inaccurate guide to display the precise location of the lingula.
Maryam Pazhutan, Shirin Sakhdari, Fatemeh Mashhadiabbas, Mahsa Afghahi, Fatemeh Khodaei,
Volume 3, Issue 1 (3-2014)
Abstract
Introduction:Langerhans cell histiocytosis (LCH) refers to a group of rare reticuloendothelial system disorders and it occurs most often in young adults and children. A 57-year-old edentulous female patient who complained of dull pain in the posterior region of the mandible referred to the dental office, with a complaint of dull pain in the posterior region of the mandible. The lesion was diagnosed as LCH . Oral manifestations could be the first signs of Langerhans' cell histiocytosis . Therefore, t he dentist must be aware of the oral symptoms so in order that the disease is not overlooked .
Parichehr Ghalayani, Mina Hamian, Maryam Jafari, Samira Hajisadeghi,
Volume 4, Issue 2 (9-2015)
Abstract
Ameloblastic fibroma is a relatively rare benign odontogenic tumor with two neoplastic components both epithelial and ectomesenchymal. A 10-year-old girl was referred to a dentist for routine dental treatments for evaluation of the distance between mandibular right first permanent molar and mandibular right second deciduous molar and it was associated with an undesirable backward movement of erupted mandibular right first permanent molar and forward movement of mandibular right second deciduous molar. The lesion was enucleated and the material was sent for histopathologic examination. Microscopically, it was composed of neoplastic proliferation of odontogenic epithelium consisted of cords and islands in a cell-rich mesenchymal stroma, with histopathological diagnosis of ameloblastic fibroma. After 24 months of follow-up, no recurrence was observed and the mandibular right first molar was spontaneously aligned. Early diagnosis and proper management will prevent comprehensive orthodontic treatment.
Pouya Mehmandoust, Narges Farhadmollashahi, Ali Ghasemi,
Volume 5, Issue 1 (3-2016)
Abstract
Introduction: This in vitro study aimed to compare the antimicrobial effect of lavandula -0fficinalis extract, with sodium hypochlorite (NaOCL) and chlorhexidine gluconate (CHX), as root canal irrigants, on Enterococcus faecalis (EF).
Materials &Methods: Seventy five extracted single-rooted premolars were selected. Root canals were prepared using rotary ProTaper system and were infected with the culture of E. faecalis. Specimens were randomly divided into five groups (n = 15), Group 1, 2: lavandula extracts (0.26 and 0.52 mg/mL), Group 3: 2.5%NaOCL, Group 4: 2%CHX, Group 5: Normal Saline. Irrigation was performed for each group for 5, 10 and 15 min. The viable bacteria obtained by collecting the canal dentin chips. Data analysis was performed with Kruskal-Wallis and Mann-Whitney u tests.
Results: The mean number of viable bacteria was significantly reduced after 5 min exposure to lavandula solutions (p<0.05). A significant difference also existed between different times in the NaOCL group, being significant between 5 and 15 min (p<0.05), but there was no significant difference between different times in the CHX group. Comparison of the mean number of viable bacteria between different groups at different exposure times revealed that the difference between lavandula and NaOCL solutions with CHX was significant at 5 and 10 min (p<0.05), however, no statistically significant difference was observed between lavandula solutions and NaOCL.
Conclusion: lavandula extract was effective in killing of EF. Further studies are necessary to fully understand its other properties such as tissue solubility, removal of smear layer and impact on dentin structure.
Mahsa Sobhi Afshar, Asghar Ebadifar,
Volume 5, Issue 1 (3-2016)
Abstract
Introduction: Since the emergence of normal occlusion concept, selecting an appropriate treatment plan with or without tooth extraction has been a controversial subject. Nowadays, both methods can be successfully used for treatment of patients. However, some clinicians still believe that non-extraction orthodontic treatments have fewer complications. The purpose of this study was to evaluate dental arch dimensional changes following non-extraction orthodontic treatment.
Materials &Methods: A total of 200 pre- and post-treatment diagnostic dental casts belonging to 100 patients (non-ext treated by 0.18 roth system) who met the inclusion criteria for this study were collected from the archives of Shahid Beheshti Dental School. Sampling was nonrandomized. A digital caliper with the accuracy of 0.1 mm was used for the measurement of variables such as inter-canine width , inter-premolar width and inter-molar width.
Results: Non-extraction orthodontic treatment increased all the variables, except for the mandibular inter-canine width and incisor-canine distance.
Conclusion: Non-extraction orthodontic treatment causes a significant increase in almost all dental arch parameters. This increase manifests as teeth flaring.
Abdoliman Amouei, Hossein Faraji, Amid Khosravi Samani, Mahmood Khosravi Samani,
Volume 5, Issue 2 (9-2016)
Abstract
Introduction: Dental wastes due to having bacterial disease-causing agents and toxic chemicals are categorized in hazardous wastes. The aim of this study was to evaluate the quantity and composition of dental waste produced by general and specialized dental offices in babol city.
Materials &Methods: From all dental offices (170 and 40 dental offices were related to general and specialized respectively) in Babol city, 20 general and 5 specialized offices were randomly selected. Waste samples were collected three times a week (Sunday, Monday and Tuesday), 50 sub-groups were separated and weighted by a digital scale with accuracy of 0.01 gram. The data were presented by excel and word software in figures and tables.
Results: The total wastes of general and specialized offices were 11829 and 2831.5 kg/year, respectively. The percentages of domestic-type, infectious, pharmaceutical and toxic wastes in general dental offices were 52.5%, 42.5%, 4.7% and 0.3%; and in specialized offices were 42.5%, 50%, 7% and 0.5%, respectively. Most components in a variety of dental waste included plastic, paper, plaster molds, glass and metal.
Conclusion: Due to the large contents of plastic, paper, plaster molds, glass and metals in domestic- type and infectious wastes produced in the general and specialized dental offices, it is necessary to manage the wastes and their separation and recycling in source place.
Mehrdad Panjnoush, Nakisa Eil, Yasaman Kheirandish, Niloufar Mofidi, Ahmad Reza Shamshiri,
Volume 5, Issue 2 (9-2016)
Abstract
Introduction: Nowadays, using implants as a choice in patient's treatment plans has become popular. The aim of this study was to determine the prevalence of mandibular lingual and maxillary buccal concavity, mean concavity depth and angle and its relation to age and gender.
Materials and Methods: In 200 CBCT, concavity depth and angle were measured in 2 mm superior to the inferior alveolar canal in the mandibular first molar area and in 1 mm distance from nasal floor in the midpoint region of maxillary lateral incisor and canine. Concavity depth and angle relationships with age and gender have been evaluated using Spearman Correlation and a t-test.
Results: Mean and standard deviation of lingual concavity, concavity angle and ridge angle in mandible were 1.3±1.54 mm, 15.45±16.19 and 10.13±6.1. Mean and standard deviation of buccal concavity and concavity angle in maxilla were 5.35±1.03 mm and 30.6±5.75. Mandibular concavity depth was zero in 44% of subjects and more than zero in 56%. Results were more than 3 mm in maxillary samples. There was a linear relationship between mandibular concavity depth and age equaled to -0.27, p=0.007 and for mandibular concavity angle and age equaled to -0.25, p=0.01. There was no significant relationship between mandibular ridge angle and age. In maxilla, there was no linear relationship between age and gender with any other variables
Conclusion: It is necessary to provide more information on these regions' anatomy using CBCT cross sections before implant placement.
Maryam Zare Jahromi, Arezoo Tahmoorespoor, Nadia Hemmat, Elham Moghadasi Broujeni, Parisa Ranjbarian,
Volume 6, Issue 1 (3-2017)
Abstract
Introduction: Debridement of root canal using appropriately safe and effective irrigants is the key factor for long-term success. Purpose of this study was to compare the antibacterial effect of propolis with 5.25% sodium hypochlorite, and 2% chlorhexidine against enterococcus faecalis.
Materials &Methods: In this study, 36 single-canal roots were used. The crown was removed and instrumentation was prepared by step-back technique, then teeth were sterilized and contaminated with E. Faecalis, and divided into four groups with 9 cases: group1: Propolis, group2: 5.25% sodium hypochlorite, group3: 2% chlorhexidine and group4: controls. Irrigants were injected by a 27-gauge syringe and roots were incubated in 37°C for one week. Sampling was done and inoculated to tryptone soy broth media, after 24 hours the turbidity was measured. Samples were also cultured on agar plates, and colony-forming units were counted as CFU/ml. Data were analysed using the Mann-Whitney test.
Results: The difference between propolis with mean value of 246.77 colonies and chlorhexidine with mean value of zero colonies, was significant (P=.002). Similarly, the difference between chlorhexidine and sodium hypochlorite with mean value 203.55 of colonies was significant and they had significant difference in turbidity (P=.002), too. No significant difference was observed between propolis and sodium hypochlorite with regard to the induced colonies (P=0.781) and their turbidity (P=0.495).
Conclusion: It can be concluded that antibacterial activity of 2% chlorhexidine against E. faecalis is more obvious than propolis or 5.25% sodium hypochlorite. But antibacterial activity of propolis over 5.25% sodium hypochlorite or vice versa was not confirmed.
Eshagh Ali Saberi, Reza Kazemian, Narges Farhadmollashahi, Abbas Mohammadi, Farnaz Alidadiani,
Volume 6, Issue 2 (9-2017)
Abstract
Introduction: Mental foramen is an important landmark in mandible and knowledge regarding the actual location of mental foramen is important in dentistry.
Materials &Methods: A total of 1172 digital panoramic radiographs were evaluated for assessment of the location of the mental foramen. The location was classified into six groups in relation to the apices of the premolars and first molar.
Results: In 957 of panoramic radiographs, fulfilling the inclusion criteria, the most common location of the mental foramen was at the apex of the mandibular second premolar. In 837 cases (87.5%), the mental foramen was located symmetrically on both sides of the mandible. Therefore, the apex of the second premolar was the most common symmetric location in both genders.
Conclusion: The results showed that the most common location of the mental foramen in population of southeast Iran was at the apex of the second premolar.
Farida Abesi, Fateme Saeedi, Sina Haghanifar, Ehsan Moudi, Soraya Khafri,
Volume 6, Issue 2 (9-2017)
Abstract
Introduction: Incisive foramen in the maxilla is the oral terminus of the nasopalatine canal. This region is important in implantology, Therefore, the aim of this study was to investigate the neurovascular anatomical variations in the maxillary anterior region, observed on cone beam computed tomography (CBCT) images.
Materials &Methods: In this cross-sectional study, maxillary CBCT images from 200 patients (100 men, 100 women, average age 45.61±11.01) were evaluated in sagittal, axial and coronal sections and the following parameters were investigated: incisive canal diameter, shapes of canal, presence of accessory canal in the anterior palate and their location, thickness of buccal bone in the sections containing canal, patient's dental and periodontal status in terms of bone loss. Data were collected and analyzed using SPSS, V20. P≤0.05 was considered significant.
Results: In sagittal view, the mean diameter of the canal was 2.36±0.69mm.Age and gender did not significantly influence the diameter. Morphological analysis of canal showed that 25% of them were hourglass-like,23.5% conical,22%funnel,27.5% cylindrical, 2% tree branch. Accessory canals were observed in 58 patients (29%) specially near to the canine region. The thickness of buccal bone plate was less in complete edentulous patients than others and also there was a significant relationship between bone loss and canal size in the hourglass and cylindrical shapes.
Conclusion: In this study, the prevalence of accessory canals was relatively significant, so it seems essential to carry out cone beam computed tomography in this area for determining the canal morphology and dimensions before implant placement.
Akam Saeidi, Mahmoud Reza Hamidi, Abolfazl Davoodabadi, Elham Mahmoudi, Soraya Khafri, Zahra Nikouee Rad,
Volume 7, Issue 1 (3-2018)
Abstract
Introduction: Root treatment will not be successful, without a proper root canal irrigation with less disadvantages and antibacterial effect. The aim of this study was to compare antimicrobial effect of cedar extract and 2.5%NaOCl on E. faecalis.
Materials & Methods: In disk diffusion test, a standard suspension of E. faecalis (ATCC 29212) was cultured on plate and different concentrations (0.05, 0.15, 0.25, 0.35, 0.45 g/ml) of methanolic or hydro-alcoholic extracts, 2.5% NaOCl and physiologic serum (as negative control) were infused on paper disks. The inhibition zone measured after 48h. In microdilution test, serial dilution of methanolic and hydro-alcoholic extracts, 2.5% NaOCl and physiologic serum in 1:2 proportion was performed in Brain Heart Infusion (BHI) culture medium. Then, standard suspension of E. faecalis was added to each well of micro plate. Data were analyzed using ANOVA.
Results: Hydro-alcoholic and methanolic extracts had antibacterial effect on E. faecalis. Inhibition zone of 2.5% NaOCl was significantly higher than that of other extracts (p<0.001). In microdilution test, E. faecalis bacterium was sensitive to both hydro-alcoholic and methanolic extracts but it was more sensitive to 2.5% NaOCl.
Conclusion: Totally, 2.5% NaOCl had the highest antibacterial effect on E.faecalis followed by hydro-alcoholic and methanolic extracts. NaOCl is an effective irrigant in root treatment until the studies like this can find a good alternative for it.
Ehsan Moudi, Sina Haghanifar, Kaveh Kazemian, Ramin Foroughi, Mehrdad Nabahati, Ali Bijani,
Volume 7, Issue 2 (9-2018)
Abstract
Introduction: Diagnosis of lesions and bone defects is very important and there is a lack of substantial studies on the most appropriate method for bone defect measurement. Hence, the aim of this study is to evaluate the accuracy of multi-slice computed tomography (MSCT) and cone-beam computed tomography (CBCT) in the diagnosis of mandibular bone defects present in sheep.
Materials & Methods: This in vitro study was performed on 15 sheep's mandibular bones. Some defects were created in cortical and spongy bone using high-speed hand piece at the buccal and lingual cortical bone of the lower jaw. Totally, 75 mandibular bone defects with a depth of 1-3 mm were created. The mandibular bone samples were scanned using MSCT and CBCT scanners, and these scans were evaluated by two oral and maxillofacial radiologists. The positive and negative predictive values, sensitivity and specificity were calculated for both methods.
Results: The sensitivity of MSCT and CBCT were 78% and 96.5% and Specificitiey of MSCT and CBCT were 90% and 92% respectively. The positive and negative predictive values were 97.5% and 89.5 % for CBCT, and 90% and 92% for MSC respectively. The negative and positive likelihood ratios (LR-) and (LR+) were 0.035 and 13.04 for CBCT as well as 0.245 and 7.82 for MSC respectively.
Conclusion: The study results demonstrated a higher accuracy of CBCT, compared to MSCT, in the diagnosis of bone defects.
Armin Sadri, Ehsan Moudi, Soraya Khafri, Ali Soleymani,
Volume 8, Issue 1 (3-2019)
Abstract
Introuduction: Knowledge of the internal anatomy and apical foramen of a tooth has always been a fundamental prerequisite for root canal therapy.Aim of the present study was to evaluate the distance of apical foramen in relation to the anatomical apex of mandibular molars by cone beam computed tomography (CBCT) in a selected Iranian population.
Materials & Methods: In this cross- sectional study,97CBCT images of 25-50 years old patients were evaluated .the teeth were assessed in coronal plan.
Results: Average (±SD) distance from apical foramen to the anatomical apex in the mesio-buccal and mesio-lingual, distal canal were [0.938 (±0.294)mm], [0.964 (±0.315)mm] and [0.982 (±0.322)mm] respectively. no statistical difference was found between right and left quadrant.
Conclusion: This study demonstrated that 1mm distance from radiographic apex in mandibular molars could be appropriate for root canal therapy.
Nazmehr Vahdani, Fatemeh Ghobadi, Ali Bijani, Sina Haghanifar,
Volume 8, Issue 1 (3-2019)
Abstract
Introduction: The aim of the current study was to evaluate the frequency of accessory foramina in human mandible.
Materials & Methods: In this cross-sectional study, 400 cone-beam computed tomography (CBCT) scan images of mandibles of 273 patients (120 males and 153 females), divided into four groups ≤30, 30–39, 40–49, and ≥50 years) with the mean age of 38.05±13.71 years (40.71±12.83 for males and 35.39±12.05 for females) were evaluated. The number and diameter of accessory foramina from midline to anterior border of ramus with 0.1 mm intervals were investigated.Data were analyzed with SPSS 17 (SPSS Inc., Chicago, I1, USA) using T-Test, Pearson's correlation coefficient and Fisher exact test.
Results: Totally, 568 accessory foramina with mean diameter of 0.35 ± 0.15 mm were seen. The frequency of accessory foramina in the studied patients was 83% with mean frequency of 88% in males and 80% in females. These results showed a significant difference between the genders in frequency of accessory foramen (P<0.001) although no difference was observed among different age groups. The highest frequency belonged to anterior lingual of mandible. The frequency of accessory foramina in posterior mandible was higher in females, while males indicated higher frequency in anterior mandible. No significant difference was found in the frequency of accessory foramina between the right and left sides of the mandible.
Conclusion: The results suggested,the survey of accessory foramina is recommended in CBCT images of mandible for therapeutic reasons due to higher frequency of accessory foramina in mandible.
Naghmeh Nasrollahi, Ali Bijani, Sina Haghanifar,
Volume 9, Issue 1 (3-2020)
Abstract
Introduction: Evaluation of the position of anterior teeth in the alveolar bone for planning implant treatments is so important. The aim of this study was to evaluate the thickness of buccolingual/palatal bone at anterior teeth roots and the angle between the tooth root axis and alveolar bone axis.
Materials &Methods: In this cross-sectional study, the position of root apex, angle between the tooth root axis and alveolar bone axis as well as thickness of buccolingual/palatal bone in 2,4,6 mm from alveolar crest and root apex areas were evaluated in the cone-beam computed tomography (CBCT) scans of 360 maxillary and mandibular anterior teeth. The data were then analyzed by ANOVA and t-test.
Results: Twenty eight females and 27 males with the mean age of 43.13 ± 10.91 participated (181 female teeth and 179 male teeth) in the current study. In maxillary anterior teeth, the buccal bone thickness was thinner than the palatal bone and was significantly smaller in females than males (p≤0.0001). The thinnest area in buccal bone was in 4mm from alveolar crest in female’s lateral incisor of maxilla (0.09±0.02). The thickness of the palatal bone in the maxillary lateral incisors was significantly thicker in females than males. The thickness of lingual bone was thicker in mandibular lateral incisors and canines than in buccal bone and the lingual bone thickness was significantly thicker in males than females. The apex position of anterior teeth was predominantly buccally in the maxilla (%94), while it was middle in the mandible (%44).
Conclusion: Due to the small thickness of buccal bone, evaluation of the position of implant fixtures in maxillary anterior teeth is of great importance.
Atefeh Gholampour, Ali Soleymani, Ali Bijani, Sina Haghanifar,
Volume 9, Issue 2 (9-2020)
Abstract
Introduction: Different materials cause artifacts in cone-beam computed tomography (CBCT) images, which, in turn, reduce the quality of images. The aim of this study was to investigate the abundance of artifacts induced by different root canal therapy sealers with two different CBCT resolutions.
Materials & Methods: Roots of four maxillary central phantom teeth were prepared using rotary files in three steps. In the first step, the first tooth was scanned first without gutta-percha and then with gutta-percha No. 25. Gutta-percha No. 25 with resin, the zinc oxide-eugenol (ZOE)-based sealer and the ceramic-based sealer were placed in the teeth No. 2, 3 and 4, respectively. The second step was performed similar to the first step, except that gutta-percha No. 35 was used in the tooth No. 1 with resin- and ZOE-based sealers in the teeth No. 2 and 3. due to the lack of access to the ceramic-based sealer that was not used to continue the study . In the third step, canal obturation was performed in the teeth No. 2 and 3 with resin and ZOE-based sealers. At each step, three CBCT scans were obtained in high and standard resolution conditions. Contrast-to-noise ratio was obtained in three root plans, and the data were analyzed.
Results: Gutta-percha alone produced more artifacts than gutta-percha with sealers. Moreover, ZOE-based sealers induced more artifacts than other sealers. There was no significant difference between the three steps. Similarly, at different resolutions, there was no significant difference between gutta-percha and sealer artifacts. The ZOE-based sealers had more artifacts at 1/3 apical whereas resin sealers had more artifacts at 1/3 coronal.
Conclusion: The higher artifact of gutta-percha in comparison with gutta-percha and sealer and the artifact decrease in the combination of gutta-percha and resin-based sealer than ZOE-based sealer has led us to recommend the use of resin-based sealer while root canal therapy in order to better evaluation of the CBCT Images of root canal.
Fereshteh Arsari, Farida Abesi, Hemmat Gholinia, Ali Soleymani,
Volume 10, Issue 2 (9-2021)
Abstract
Introduction: Enough knowledge of the internal anatomy and apical foramen of a tooth has always been a fundamental prerequisite for root canal therapy. The current study aimed to determine the position and distance of apical foramen to anatomical apex in maxillary anterior teeth in cone-beam computed tomography (CBCT) in the Iranian population.
Materials& Methods: In this retrospective cross-sectional study, CBCT scans of 250 patients referred to a dental clinic in the city of Babol, Mazandaran province, are investigated. The inclusion criteria were being aged 18 to 70 years, and having maxillary teeth from right canine to left canine. The exclusion criteria were history of trauma in the anterior of maxilla, the openness of the apex, not finding the apex, endodontically treated tooth, surgery in the apical area, and dental anomalies. Maxillary anterior teeth were examined for apical foramen position and radiographic foramen-apex distance by CBCT in coronal and sagittal planes. Age, gender, and quadrant of teeth were recorded, and their association with radiographic foramen-apex distance was investigated. Finally, data were analyzed using ANOVA and Independent T-test with P≤ 0.05 was considered significant.
Results: The mean foramen-apex distance in central incisor teeth was 0.53±0.28 mm, in lateral incisor teeth was 0.56±0.31 mm, and in canine teeth was 0.76±0.39 mm. The frequency of apical foramen position in central and lateral teeth was 34.1% and 22.6% centrally, and in canine teeth was 20% distally, respectively. Age and quadrant had no effect on foramen-apex distance. The radiographic foramen-apex distance was higher in men than women, which was statistically significant (P-value=0.003).
Conclusion: Based on the findings, it seems that in the treatment of the root of the anterior teeth of the maxilla, if the working length is considered to be 1 mm shorter than the radiographic apex, it will be better.
Zahra Tafakhori, Mehrad Rafiei,
Volume 10, Issue 2 (9-2021)
Abstract
Introduction: Considering the effect of ethnicity and race on the root canal morphology of different teeth, this study was conducted to determine the root canal anatomy of permanent maxillary first premolars using cone-beam computed tomography (CBCT) in an Iranian population.
Materials & Methods: This descriptive cross-sectional study was performed on 150 CBCT radiographs of an Iranian population, referred to a Radiology Clinic in Rafsanjan, Iran. The CBCT images were evaluated in terms of the number of roots and canals of maxillary first premolar and also canal types in axial and sagittal images. The Vertucci classification was used for assessing the root morphology. Data were collected using a checklist. The independent t-test and Chi-square test were used and analyzed at a significance level of 0.05.
Results: A study of 150 radiographs showed that 81 and 69 ones had one root and two roots, respectively. In terms of canal type in the single-root teeth, 13 radiographs (16%) were type I, 36 (44.4%) were type II, 6 (7.4%) were type III, 17 (21%) were type IV, two (2.5%) were type V, four (4.9%) were type VI, and three (16%) were type VII. It should be noted that none of the radiographs had a type-VIII canal.
Conclusion: This study has indicated that the Iranian population has a complex maxillary first premolars root canal morphology, and according to Vertucci classification, types II and IV are more common; hence, the Clinician must be very careful before treating the root canal of the first maxillary premolars.
Azadeh Zakariaee Jubari, Azadeh Torkzadeh,
Volume 11, Issue 1 (3-2022)
Abstract
Introduction: The maxillary sinuses are the largest paranasal sinuses adjacent to the teeth. Due to anatomical variations in different people, knowledge of these variations is essential for rhinoplasty and sinusitis. The aim of the present study was to determine the relationship between maxillary sinus volume with nasal septal deviation, concha bullosa and infundibulum size using cone-beam computed tomography (CBCT).
Materials & Methods: In this descriptive -analytical study, CBCT images of 135 patients who underwent maxillofacial imaging were evaluated. In order to measure the volume of maxillary sinuses, CBCT images of axial sections were used with a thickness of 2 mm and Digimizer image analysis software. In the coronary section of nasal septum deviation, types of concha bullosa and infundibulum size were determined. Data were analyzed using one-way ANOVA, paired t-test, Pearson correlation test and regression. A value of P<0.05 was considered significant.
Results: There was a significant inverse relationship between the mean of volume of the right sinus (p=0.012, r=-0.216) and left sinus (p<0.001, r=-0.303) with the deviation of the nasal septum. A significant inverse relationship was found between the mean volume of right maxillary sinus (p<0.012, r=-0.357) and left maxillary sinus (p=0.006, r=-0.357) with infundibulum size. The mean volume of right and left sinues from coronal view was not significantly different in the presence or absence of concha bullosa. There was no significant difference between male and female in the mean volume of the right and left sinuses.
Conclusion: The present findings suggest that maxillary sinus volume is smaller the deviation in moderate and severe septal deviation cases and that the maxillary and with increasing size of infandibulum, the volume of maxillary sinus was larger.
Maryam Seyedmajidi, Tahereh Momeni, Fatima Bijani,
Volume 12, Issue 2 (9-2023)
Abstract
Calcifying odontogenic cyst (COC) is an odontogenic cyst with accumulation of ghost cells that has central and peripheral subsets. Here, we present an 11-year-old male patient with an intraoral swelling on the left posterior mandibular ridge interfering with eruption of the second molar. Histopathologic examination revealed a cystic lesion lined by ameloblast-like epithelium in the basal layer and accumulating ghost cells in the upper layers. The final diagnosis was peripheral COC, and there was no recurrence after 6 months. This case has shown that histologic examination is required for every simple case.
