Showing 20 results for Mahmood
H. Mahmood Hashemi ,
Volume 12, Issue 2 (9 1999)
Abstract
The most important craniofacial dysostosis & syndromes are Crouzon, Apret, Pfeiffer.Carpenter Saether- Chotzen. The common characteristic is premature closure of cranial sutures, which result in Maxillofacial deformities. Perfect recognition and carefully evaluation are the most important points in their reconstruction surgery.Because the prevalence & surgical treatment of Crouzon syndrome is low, I present a case report include surgical treatment of a patient with crouzon which was a accomplished in Shariati Hospital.
F. Grami Panah , A. Fazel , M. Haj- Mahmoodi ,
Volume 13, Issue 3 (9 2000)
Abstract
It has been shown that noble alloys require metal collar to resist distortion when subjected to repeat firing cycle of porcelain. Metal collar is undesirable due to esthetic concerns. Since base metal alloys have superior physical properties, it seems that metal collar would not be necessary for obtaining better marginal adaptation of base metal crowns. The Purpose of this study was to evaluate the effect of metal collar on marginal distortion of base metal- ceramic crowns, Twenty base metal copings were constructed and divided into two groups with and without collars. After surface preparation, porcelain was applied onto the surface of specimens. Marginal gap was measured by scanning electron microscope during three stages of crown fabrication: before degassing, after degassing and after glazing. The mean measurements in collarless group were 21.4±13.4, 2I.4±14.9 and 21.9±11.9 u_m, respectively, and in-group with collar 24.7±11.4, 24.0±! 1.5 and 26.6±11.7 urn, respectively. Two- way ANOVA revealed no significant difference in the mean values between two groups and among different stages of crown fabrication. The results of this study showed that base metal alloys did not distort during crown fabrication and metal collar had no effect on the amount of marginal opening (gap).
A. Kousari , J. Mahmoodian , A. Rashidian ,
Volume 13, Issue 3 (9 2000)
Abstract
The purpose of this study was to assess the fluoride release of three fluoride- containing materials exposed to fluoride solutions. This study compared the initial fluoride release and release following re-fluoridation (neutral or acidic 2% NaF) of three different filling materials, conventional glass ionomer cement (CG1C), resin- modified glass ionomer cement (RMGIC), polyacid- modified composite resin (PAMCR). Twenty discs of each material, measuring 2mm height and 6mm diameter, were suspended in separate vials of 2" laboratory artificial saliva. The amount of fluoride release was measured over two periods of 28 days each. Fluoride release was determined at 1,3,7,14 and 28 days of each period. Fluoride was measured with a fluoride ion- specific electrode and an ion analyzer previously calibrated with standard solution .T- test and ANOVA were used to evaluate the data. Fluoride release for all products at days 1 and 3 was significantly greater than the rest of the time intervals. Then, the fluoride release decreased significantly. CGIC released significantly more fluoride than the other products. This was followed by RMGIC, which exhibited significantly more fluoride release than PAMCR. In second period of experiment, the specimens were assigned to two subgroups often each. The samples exposed to two different solution of NaF (neutral or acidic). All groups showed the capacity of re-fluoridation and fluoride uptake. The specimens exposed to acidic NaF solution showed statistically more significant rechargeability than the neutral NaF solution. It may be concluded that glass ionomer cements act as a rechargeable slow fluoride release systems and as an effective caries preventive material in caries preventing programs for caries susceptible children.
H. Mahmood Hashemi ,
Volume 14, Issue 1 (9 2001)
Abstract
Dry socket is one of the most common complications of teeth extractions. Etiology and pathogenesis of dry socket are not clearly known but many related predisposing factors have been discussed. According to this, a cross- sectional study was conduced at the department of oral and maxillofacial surgery (Tehran University of Medical Sciences, Oct. 97- Jul. 98). 4880 teeth were extracted which 25 of them recalled with dry socket. The relationship between the effective factors and dry sockets was evaluated. The effective factors were as follows: age, sex, site of extraction, and trauma during exctraction, infection, oral hygiene, smoking, and systemic diseases. Results showed that the incidence of dry socket was %0.5, and the number of cases observed in women was two times more than men. Also, mandibular third molars were involved more than any other areas.
J. Mahmoodian , A. Kowsari , B. Esmaeili ,
Volume 14, Issue 4 (10 2002)
Abstract
The goal of this investigation is to compare the extent of fluoride uptake by sound enamel following application of two commercial mouthrinses containing sodium fluoride (0.2%) and a topical gel containing APF (1.23%) produced in Iran with those of foreign standardized ones. Sixty extracted premolars were used. Each tooth was divided into two lingual and buccal halves, one half as control, the other one as experimental. Enamel biopsy technique (two- step acid etching) was used to determine the concentration of fluoride and calcium in each sample. For data comparison and fluoride uptake estimation, the depths of layers with the use of linear regression analysis were standardized to 25 and 50um. The analysis showed that in Iranian mouthrinse no. 1, there is linear correlation between fluoride concentration and enamel depth, in both control and experimental group at the first and second layers, while, in other groups, this correlation was observed just at the first layer (superficial enamel layer). The greatest fluoride uptake was seen at Iranian mouthrinse no.2 and the least was seen at foreign mouthrinse no. 3. From among two APF gels, the greatest uptake was observed at gel no. 1 (Iranian). The results showed that all three Iranian products increase fluoride content of enamel, moreover the level of fluoride uptake, while applying Iranian products, in comparison with foreign ones, shows considerable increase.
V. Talebi , H. Mahmood Hashemi , H. Gahani Hashemi ,
Volume 16, Issue 2 (8 2003)
Abstract
Statement of Problem: One of the easiest and most practical methods to predict the size of permanent canines and premolars, is of Tanaka-Johnston, but their research has been only performed on white skin North Europeans and it should be noted that the size of teeth, in various races, differ from each other.
Purpose: The aim of this study was to determine the validity of Tanaka-Johnston method, in a sample population taken from Ghazvin city.
Materials and Methods: The numbers of 235 pairs of study casts, prepared before any kind of treatment, were selected. The size of lower permanent incisors and permanent canines and premolars of both arches were measured. To analyze the results, "regression analysis" and "t test" were used.
Results: Based on the findings obtained from this study, new prediction equations as Y=12.9+0.4(X) and Y=]0.6+0.5(X) were presented for maxilla and mandible, respectively. However, these equations did not differ from Tanaka-Johnston equations statistically.
Conclusion: Tanaka- Johnston equations can be acceptably applied for the sample population taken from Ghazvin city, if the predictions are not overestimated.
H. Mahmood Hashemi ,
Volume 18, Issue 3 (11 2005)
Abstract
Background and Aim: The treatment of epulis fissuratum is surgery, but a new proposed modality is laser surgery. The aim of this study was the comparison between laser and blade surgery in the treatment of epulis fissuratum.
Materials and Methods: In this clinical trial, 12 patients with epulis fissuratum were selected. The lesions were divided into two parts. One part was resected by laser and the other by surgical blade randomly and single blinded. The time of surgery, bleeding, wound repairment as well as the depth of vestibule were measured. Data were analyzed using Wilcoxon sign test and Paired t test with P<0.05 as the limit of significance.
Results: The wound of laser surgery healed sooner and the depth of vestibule in laser side was deeper comparing with blade surgery. Also the time of surgery was less than blade.
Conclusion: Based on the results of this study, we suggest that laser surgery is a more useful technique for the treatment of epulis fissuratum.
H. Mahmood Hashemi ,
Volume 19, Issue 1 (3 2006)
Abstract
Background and Aim: Several factories produce dental cartridge in the world. In Iran, Daroupakhsh company is responsible for this task. The aim of this study was evaluate some properties of daroupakhsh cartridge and compare them with two imported ones: Ecocaine (made in Italy) and Septodont (made in France).
Materials and Methods: In this experimental study, 70 healthy patients from maxillofacial clinic of Shariaty hospital were selected. After obtaining informed consent, 0.1 cc of each carpule was injected to the patients' frontal region and the extent of anesthesia was measured at different time intervals. Also the quality of injections was evaluated by 11 surgeons. The dimensions of the three cartridges were also measured and compared together. Data were analyzed by repeated measure ANOVA and Friedman with p<0.05 as the limit of significance. Results: There was no significant difference in extent and duration of anesthesia among the studied cartridges. Surgeons were equally satisfied of all three kinds of cartridges. All of the cartridges were aspirable.
Conclusion: Based on the results of this study, the three studied cartridges had similar properties.
H. Mahmood Hashemi , P. Shokri ,
Volume 20, Issue 4 (5 2008)
Abstract
Background and Aim: Proximal segment movements following different methods of ramus osteotomy is one of the undesired consequences of orthognathic surgery. Theoretically, it seems that intraoral verticosagittal ramus osteotomy can minimize the movement of proximal segment. In this study, changes in intergonial distance and ramus flaring angles were evaluated and compared in transverse plane after mandibular set back by two osteotomy techniques.
Materials and Methods: In this randomized clinical trial 20 patients with mandibular prognathism without any asymmetry were selected and divided into two groups of 10 each.One group was treated by bilateral sagittal split ramus osteotomy and the other by intraoral verticosagittal ramus osteotomy technique. Intergonial width and inner ramal angle in transverse plane were measured on radiographs before and 1 and 12 weeks post surgery . Data were analyzed using covariance test with P<0.05 as the level of significance.
Results: Changes of intergonial distance and interramal angle in each group were significant after 1 and 12 weeks after surgery. No statistically significant difference was observed between the two studied groups.
Conclusion: According to the results of this study, there is no difference between bilateral sagittal split and intraoral verticosagittal ramus osteotomy techniques regarding mandibular width and ramus flaring changes.
Hashemi Mahmood , ,
Volume 21, Issue 2 (12 2008)
Abstract
Background and Aim: Zygomatic fractures are common among oral and maxillofacial problems and ocular injuries are of great importance, the prevalence of ocular problems following zygomatic fractures in Iran is not clear so we performed this study to evaluate this problem in patients referring to Shariati Hospital.
Materials and Methods: In this descriptive, cross-sectional study, we evaluated the patients who referred to department of oral and maxillofacial surgery of Shariati hospital for ocular complains following zygomatic fractures. The evaluation was performed both clinically and historically.
Results: 115 patients were examined (87 males and 28 females) with the mean age of 26 for males and 32 for females. The prevalence of ocular injuries were as follows: subconjunctival ecchymosis: 23.07% for males and 21.05% for females. Displacement of palpebral fissure: 26.5% for males and 27.6% for females. Unequal papillary levels: 18.37% for males and 15.78% for females. Diplopia: 8.9% for males and 10.5% for females. Enophthalmos: 23.1% for males and 25% for females.
Conclusion: It is strongly recommended to refer patients with zygomatic fracture for an ophthalmologic consultation.
H. Afshar, J. Mahmoodian, P. Motahhary, A. Khanlarpoor,
Volume 21, Issue 2 (12 2008)
Abstract
Background and Aim: Pit and fissure sealant therapy, is one of the most effective methods, in prevention of occlusal caries. Saliva contamination before curing the resin can increase the risk of failure in this method. The purpose of this study was to evaluate the effect of saliva contamination prior to curing on microleakage of pit and fissure sealants.
Materials and Methods: In this experimental in vitro study 21 sound human pre molars were selected and two standardized V-Shaped fissures were prepared on both buccal and lingual surfaces, then they were randomly divided into two equal groups. In the control group, the sealant was cured without any saliva contamination and in the case group, the sealed teeth were immersed in artificial saliva for ten seconds before curing. After thermocycling the samples were immersed in 2% fouchsin solution for 24 hours and then sectioned longitudinally in bucco - lingual direction. The specimens were then fixed and assessed under stereomicroscope to determine microleakage and dye penetration using paired student t. test. P<0.05 was considered as the level of significance.
Results: Analysis of data showed no significant differences in microleakage, between the two groups (p=0.178).
Conclusion: According to the results of this study saliva contamination of uncured sealant had no influence on microleakage.
H. Mahmoodhashemi, S. Ghafari Gorakani, N. Akhondi,
Volume 22, Issue 3 (1 2009)
Abstract
Background and Aim: The usage of free gingival grafts for vestibuloplasty is a routine procedure. The free gingival procedure requires harvesting the graft from a donor site which increases morbidity and the risk of surgical complications. In addition, adequate amount of donor tissue may not be available. Acceptable results of Alloderm application as a substitute for autogenous soft tissue grafts are: Not exposing the patient to an additional surgery, no donor site morbidity, unlimited availability, decreasing the bleeding during the surgery, decreasing the surgical complications, and better color match. The aim of this study was to evaluate the maintenance of the vestibular depth in vestibuloplasty with mucosal graft and Alloderm.
Materials and Methods: Both methods of anterior mandibular vestibuloplasty by Clark, utilizing Alloderm and mucosal grafts, were employed in ten clinical cases. During the surgeries, half the prepared recipient sites received Alloderm, while the remaining half received autografts in a randomized fashion. Immediately, 1, 3, and 6 months postoperatively, the variables of graft rejection, depth of vestibule and the degree of relapse were evaluated. SPSS software was used for analysis of the data and the methods used for "statistical tests" were as follows: Friedman Method, Paired sample t-test, Smirnov-kolmogrove Method. (The statistical significance level was established at P-value<0.05.
Results: The mean difference of the relapse measurements in both methods throughout the survey did not have significant predictive value (P>0.05). Similar results were achieved for the mean difference of depth of the vestibule.
Conclusion: In patients undergoing Vestibuloplasty, Alloderm could be material of choice to be utilized as autogenic soft tissue grafts in pre-prosthesis procedures.
Mh. Hosseini, A. Kamali, M Mahmoodzadeh Darbandi,
Volume 23, Issue 1 (22 2010)
Abstract
Background and Aims: Lasers with different characteristics have been used to stimulate orthodontic tooth movements and to inhibit the pain during tooth movements. Considering the contradictory finding in this respect, the effect of low level laser therapy (LLLT) was evaluated on the pain during orthodontic tooth movement.
Materials and Methods: In this randomized clinical trial study, 12 patients were included with extracted upper first premolars and required canine retraction into extraction site. While in both sides canines were retracted by Niti coil spring, one side was exposed to GaAlAs laser (890nm). LLLT was done on the buccal and palatal mucosa by slow movement of probe. The patients were asked about their pain on both sides 2 days after beginning of retraction. Pain measurement was evaluated with VAS.
Results: Pain perception in LLLT side significantly decreased (P=0.007).
Conclusion: Based on the results, single irradiation of GaAlAs laser (12J energy per tooth) can decrease pain perception.
Mh. Hosseini, M. Mahmoodzadeh Darbandi, A. Kamali,
Volume 24, Issue 3 (21 2011)
Abstract
Background and Aims: Lasers with different characteristics have been used to stimulate orthodontic tooth movement. Considering the contradictory findings in this regard, this study was designed to assess the effect of low level laser therapy (LLLT) on the rate of orthodontic tooth movement.
Materials and Methods: In this randomized clinical trial study, 12 patients (4 boys and 8 girls average age:16.9 ± 3.4) with extracted upper first premolars and required canine retraction into extraction site were included. While in both sides canines were retracted by NiTi coil spring, one side was exposed to GaAlAs laser (890 nm). LLLT was done (on the buccal and palatal mucosa by slow movement of probe) at the beginning of the first month. Impression and cast fabrication performed at the beginning of retraction, one and two months later. The amount of retraction on the cast was measured with the aid of a reference plaque fabricated on the rogae using a digital caliper. Data were analyzed using paired sample T-test and one-sample Kolmogorov-Simirnov test.
Results: There was no significant difference in the amounts of canine movement between laser exposed and control sides (P>0.05).
Conclusion: The energy dose of laser used in this study (72 J per each tooth) was not appropriate for increasing dental movement.
Maryam Rabiei, Seyed Mahmood Rezvani, Nazanin Asadpour, Ehsan Kazemnejad Leyli,
Volume 27, Issue 3 (9-2014)
Abstract
Background and Aims: AIDS-associated oral lesions are important, in terms of diagnostic-prognostic role and monitoring patients moreover some of them may reduce patient’s quality of life. The aim of this study was to determine the prevalence of oral lesions in HIV patients.
Materials and Methods: This descriptive cross-sectional study was carried out among a total of 62 HIV+ patients who attended a counseling and treatment center in Rasht. Demographic information, drugs and laboratory status were extracted from patients’ files. Data were analyzed using univariate and multivariate logistic regressions with multiple linear regressions.
Results: From 62 cases, 50 were male and 12 female and the mean age was 40.5±11.3 years. 59 patients had oral lesions including periodontal disease (95%). The most prevalent oral lesions included: periodontitis (67.7%), oral candidiasis (41.9%) of erythematous (35.4%) and pseudomembranous types (6.45%) and angular cheilitis (12.9%). Patients with removable denture presented a higher rate of erythematous candidiasis and angular cheilitis (P=0.001). In this study, periodontal diseases were rosed by the post-diagnosis years (P=0.024) and the antiretroviral medications (P=0.002). Patients on the prophylactic medications (P=0.043) were less likely to have erythematous candidiasis age may caused angular cheilitis (P=0.041). Pseudomembranous candidiasis was inversely correlated with CD4 + L levels (P=0.052).
Conclusion: The majority of the cases in this study were IV drug user males within the 4th decade of life. Although oral lesions were not common, but the dental and periodontal statuses exhibited poor oral hygiene which need more attention.
Gholamreza Esfahanizadeh, Mahmood Aghel, Saeed Mohammadi Asl, Elnaz Bayat,
Volume 30, Issue 4 (1-2018)
Abstract
Background and Aims: Marginal gap measurement in all ceramic restorations they are of fundamental important for the successful used. As some studies led to contradiction results, yhe aim of this study is to compare marginal gap restorations between 4 kinds of ceramic restorations Inceram, IPS-e.max Press, Zirconia (CAD/CAM) and PFM.
Materials and Methods: In this In-vitro experimental research, one stainless steel die with deep chamfer finish line design (1 mm depth) was prepared on a maxillary premolar. 40 epoxy resin dies were made, dies were divided in to 4 groups (n=10), Zirconia, IPS e.max press, Inceram, Mental Ceramic systems (MC). Then, the prepared crowns were put on the stainless steel die and observed their marginal mismatch under sterio microscope before cementation. Data were analyzed by One- way ANOVA, and one sample kolmogorosmirnov tests.
Resultes: There was significant difference in the marginal gaps between (MC) (102.92±28.7), Inceram (98.41±24.91), IPS e.max press (128.22±25.48), and Zirconia (69.5±10.9) (P=0.0001).
Conclusion: The comparison of marginal gap for the four groups was significant test. Therefore, it can be concluded that marginal gap, the probability of leakage and recurrence of caries in Zirconia systems is the least and in the IPS e.max press systems is the most.
Hamid Mahmoodhashemi, Abbas Karimi, Parisa Bagheri, Narges Hajiani,
Volume 32, Issue 2 (10-2019)
Abstract
Background and Aims: Management of an emergency is ultimately the dentist’s responsibility. Therefore, the dentists need to be able to manage an emergency and perform Cardiopulmonary Resuscitation (CPR) if necessary. The present study was undertaken to assess the knowledge of final-year dental students in Tehran regarding CPR.
Materials and Methods: In a cross-sectional study, 200 final-year dental students (44 males and 156 females) from 4 dental schools in Tehran were randomly selected and surveyed using a multiple choice questionnaire evaluating their knowledge about CPR. The data were analyzed by SPSS16 software using two descriptive and inferential statistical methods via chart drawing of statistical quantities calculation and analysis of variance.
Results: The mean score was 5.43±2.43. A positive correlation was found between receiving practical training and level of knowledge (P=0.001). However, the results showed no statistical differences between sex (P=0.409) or various dental schools (P=0.089).
Conclusion: Since, the level of knowledge about CPR among participants were poor, there is a perceived need for further training in dental schools.
Nazanin Kamyab, Mahmood Sheikh Fathollahi, Azadeh Khaleghi, Zohreh Mordouei,
Volume 32, Issue 3 (11-2019)
Abstract
Background and Aims: Saliva is the first body fluid that is exposed to the free radicals found in cigarette smoke. Antioxidant substances in saliva, such as vitamin C, play an important role in the defense mechanism against free radicals. Therefore, the aim of this study was to examine the effect of vitamin C on the total antioxidant capacity of saliva in smokers.
Materials and Methods: This randomized clinical trial was performed on 60 healthy male smokers who referred to the dental clinic in Rafsanjan in 2017. Individuals were randomly divided into three groups. The first and second groups received 500 and 1000 mg of vitamin C boiling tablets for three weeks. The third group did not receive any vitamin C supplements. The total antioxidant capacity of saliva was measured using an antioxidant kit and an ELISA reader. Data were analyzed using paired t-test, one-way ANOVA, and Duncan's multiple comparisons test.
Results: The results showed that the mean total antioxidant capacity of saliva after the intervention was found statistically significant among groups (P<0.001). However, the mean total antioxidant capacity of saliva did not differ in the groups receiving 500 and 1000 mg of vitamin C (P=0.420).
Conclusion: The results showed that taking vitamin C increased the total antioxidant capacity of saliva in smokers.
Ali Dehghani Nazhvani, Mahboobeh Razmkhah, Amirreza Jassbi, Mohammadreza Khademalizadeh, Afsoon Mahmoodi,
Volume 32, Issue 4 (1-2020)
Abstract
Background and Aims: Oral squamous cell carcinoma (OSCC) is one of the most prevalent oral cancers with increased risk in individuals younger than 40 years especially in developed countries. There are many evidences that people who have plenty of fruits and vegetables in their diets tend to have lower risk of cancer. In this study, we evaluated the anticancer effect of four medicinal plants of Otostegia Persica, Otostegia Michauxii, Otostegia Aucheri, and Hibiscus Sabdariffa on OSCC cell lines.
Materials and Methods: In this study, methanolic & dichloromethane extracts of the above medicinal plants were used in order to evaluate their effect on oral squamous cell carcinoma cell line in different concentrations and after 24 , 48 and 72 hrs by MTT assay test. Finally, the appropriate concentration for repeating the test were chosen.
Results: In this study, the mean amounts of IC50 for O. persica and O. Aucheri were less than the two other herbs and the least and most amount of IC50 were related to the dicloromethanolic extract of O. persica after 72 hrs and the water extract of H. sabdariffa after 24 hrs, respectively.
Conclusion: It was concluded that all of the plants evaluated especially O.Persica and O.Aucheri had anticancer properties and dichloromethalonic extracts of these plant were more effective than that of methanolic extract.
Shahin Shams, Alireza Sharifinejad, Ali Saleh, Pedram Mahmoodi, Abolfazl Mohammadbeigi, Mohammad Mehdizadeh,
Volume 36, Issue 0 (5-2023)
Abstract
Background and Aims: Management of pain and inflammation after third molar surgery is an important challenge of this treatment. Various medications have been proposed for pain control after surgery. Comparing the effectiveness of various drugs used in this field can improve dentists' clinical decisions. The aim of this study was to compare the effect of Ketorolac and Gelofen on pain relief in patients undergoing third molar surgery.
Materials and Methods: This randomized single-blinded clinical trial was performed on 140 patients who were divided into two groups of 70 after receiving the ethical code. The first group was prescribed 400 mg Gelofen capsule for 1 week, while the second group was prescribed 30 mg ketorolac ampule for 1 week. Then, using the visual analog scale (VAS), the patient’s pain was recorded 48 hours, 1 week, and 2 weeks after surgery. Data analysis was carried out using SPSS20 software by descriptive analysis of the results. Ki-square, T-test, and variance analysis were also used for analysis of variables.
Results: The pain level in the ketorolac group after 48 hours, 1 week, and 2 weeks following surgery was significantly less than Gelofen group (P<0.01). Ketorolac effect on pain was irrelevant to the gender, age, and type of tooth variables.
Conclusion: From the results, it was concluded that Ketorolac had greater effect on pain relief after third molar surgery than Gelofen.
