Journal of dentistry (Shiraz, Iran)最新文献

{"title":"AI-Powered Microscopic Diagnostic Techniques for <i>Candida albicans</i> Detection: A Systematic Review.","authors":"Reyhaneh Shoorgashti, Farnaz Jafari, Simin Lesan","doi":"10.30476/dentjods.2025.104629.2540","DOIUrl":"https://doi.org/10.30476/dentjods.2025.104629.2540","url":null,"abstract":"<p><strong>Background: </strong>Artificial intelligence (AI) powered technologies can help detect <i>Candida albicans</i> (<i>C. albicans</i>) infections, which are a public health challenge due to increasing incidence rates and conventional therapy resistance.</p><p><strong>Purpose: </strong>This review explores recent advancements, methodologies, and clinical implications in the AI-driven microscopic detection of <i>C. albicans</i>.</p><p><strong>Materials and method: </strong>A literature search was conducted across multiple databases, including PubMed, Scopus, Embase, Web of Science, and Google Scholar. Following a thorough review of the retrieved articles, 7 studies were selected for inclusion in this review.</p><p><strong>Results: </strong>This review analyzed 7 studies that employed AI and machine learning (ML) to detect the presence of <i>C. albicans</i>. The most commonly used dataset for detecting <i>C. albicans</i> through AI was microscopic images. Two studies employed time-lapse microscopy, and another study used the microorganism's smell fingerprint or volatile organic compounds with an impressive accuracy of 97.70%. The accuracy of detecting <i>C. albicans</i> through AI using microscopic images ranged from 63% to 100% depending on the model used.</p><p><strong>Conclusion: </strong>AI can improve the detection of <i>C. albicans</i> infections. It can enhance the accuracy, speed, and efficiency of detection, providing clinicians with invaluable support in identifying infections earlier, optimizing treatment strategies, and ultimately improving patient outcomes.</p>","PeriodicalId":73702,"journal":{"name":"Journal of dentistry (Shiraz, Iran)","volume":"27 4","pages":"1-12"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13080348/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147701013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating the Relationship between Stress and Emotional Intelligence with Academic Progress of Dental Students by Measuring Salivary Cortisol Levels.","authors":"Yasamin Barakian, Fatemeh Kazemimoeen, Hamid Asayesh, Samira Hajisadeghi, Elham Keykha","doi":"10.30476/dentjods.2025.104363.2526","DOIUrl":"https://doi.org/10.30476/dentjods.2025.104363.2526","url":null,"abstract":"<p><strong>Background: </strong>Dental schools can be a stressful place that may impair students' performance. This stress can be related to several salivary biomarkers such as salivary cortisol. Also, emotional intelligence (EI) is one of the important factors in adapting people to the environment.</p><p><strong>Purpose: </strong>This research investigated the relationship between stress and EI with academic progress in Qom's Dental School students.</p><p><strong>Materials and method: </strong>This cross-sectional (descriptive-analytical) study measured salivary cortisol using the enzyme-linked immunosorbent assay (ELISA) method. It involved 88 dental students in their third to sixth years. The required data were gathered using two standard questionnaires, namely Wang and Law's EI scale and the dental environment stress questionnaire. Pearson's correlation coefficient and independent t-test were used for data analysis.</p><p><strong>Results: </strong>A total of 88 students participated in this research, of which 54.5% were female. Salivary cortisol had no relationship with EI or stress from the dental environment (<i>p</i> Value= 0.201). A direct relationship was found between EI and dental environment stress (<i>p</i> Value= 0.011).</p><p><strong>Conclusion: </strong>This study found no association between salivary cortisol levels, dental environment stress, and EI. Additionally, cortisol levels were inversely related to students' annual grade point average. Conversely, there was no correlation between annual grade point average and EI.</p>","PeriodicalId":73702,"journal":{"name":"Journal of dentistry (Shiraz, Iran)","volume":"27 4","pages":"54-61"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13080352/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147701083","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Does Air Abrasion of Dentin Affect the Bonding Performance of Different Universal Adhesives?","authors":"Fatemeh Safaei-Firoozabadi, Fatemeh Hashemi Moghadam, Seyedeh Farnaz Tabatabaei, Saeed Nemati, Farnaz Madisiar","doi":"10.30476/dentjods.2025.103036.2413","DOIUrl":"https://doi.org/10.30476/dentjods.2025.103036.2413","url":null,"abstract":"<p><strong>Background: </strong>Despite significant advancements in adhesive systems, the bond between tooth-colored restorations and dental hard tissues remains a challenge.</p><p><strong>Purpose: </strong>This study aims to evaluate the effects of air abrasion on the bond strength and microleakage of universal adhesives.</p><p><strong>Materials and method: </strong>Eighty intact third molars were used in this <i>in vitro</i> study. Microtensile bond strength (μTBS) was tested on 32 teeth, and microleakage was assessed on 48 teeth. For μTBS testing, occlusal enamel was removed to expose a flat dentin surface. Standardized Class V cavities were prepared on the buccal and lingual surfaces for the microleakage test. Teeth were randomly divided into four groups according to the universal adhesive system used: All-Bond Universal, G-Premio Bond, G2-Bond Universal, and Clearfil SE Universal Bond. Each group was further split into two subgroups based on whether air abrasion pretreatment was applied. A 4-mm composite resin block (Tetric-N-Ceram, Ivoclar Vivadent) was built on the bonding surface for μTBS, and Class V cavities were restored with the same composite for microleakage evaluation. Then μTBS was measured using a universal testing machine, while microleakage was assessed via dye penetration. Data were analyzed using Tukey and t-tests for μTBS, and the Kruskal-Wallis test for microleakage, with significance set at α = 0.05.</p><p><strong>Results: </strong>Air abrasion significantly improved μTBS for All-Bond Universal and Clearfil SE Universal Bond (<i>p</i>< 0.001), G-Premio Bond (<i>p</i>= 0.041), and G2-Bond Universal (<i>p</i>= 0.027). However, it did not significantly affect microleakage (<i>p</i>= 0.32).</p><p><strong>Conclusion: </strong>Pretreating dentin with air abrasion enhances the bond strength of universal adhesives without increasing microleakage, supporting its use in restorative procedures.</p>","PeriodicalId":73702,"journal":{"name":"Journal of dentistry (Shiraz, Iran)","volume":"27 4","pages":"70-79"},"PeriodicalIF":0.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13080373/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147701115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluating Calcium Hydroxide Removal Techniques in Endodontics: A Comparative Analysis.","authors":"Vahid Fallahi Sarvenoei, Mohsen Aminsobhani, Babak Farzaneh, Mohammad Ali Ketabi","doi":"10.30476/dentjods.2025.103049.2416","DOIUrl":"10.30476/dentjods.2025.103049.2416","url":null,"abstract":"<p><strong>Background: </strong>Endodontic therapy plays a pivotal role in dentistry, with effective removal of intracanal medications crucial for successful treatment. The lingering presence of calcium hydroxide within dentinal walls can impede sealer adhesion and compromise treatment outcomes.</p><p><strong>Purpose: </strong>This study aimed to compare the efficacy of various methods for removing calcium hydroxide from different regions of the root canal wall.</p><p><strong>Materials and method: </strong>In this <i>in vitro</i> randomized trial study, 108 extracted teeth underwent canal cleaning and shaping using the Dentsply Protaper Gold rotary system. Subsequently, except for the negative control group, all teeth were filled with calcium hydroxide and divided into eight groups. These groups underwent different cleaning protocols involving Gentle Brush or Gentlefile #021 files or master apical file in combination with ethylene-diamine-tetra-acetic acid or sodium hypochlorite solutions. After tooth splitting, stereomicroscopic images were taken, and Digimizer software was utilized to calculate residual calcium levels in coronal, middle, and apical regions. Mann-Whitney test was used to check the effect of the cleaning method and type of washing solution among the methods employed. All the analyses were conducted using SPSS 22.</p><p><strong>Results: </strong>The results indicated that the Gentle Brush method's superior efficacy in calcium hydroxide removal compared to other files, which was statistically significant (<i>p</i> Value <0.01). Similarly, the ethylene-diamine-tetra-acetic acid rinse solution proved more effective than sodium hypochlorite in clearing calcium hydroxide from the canal wall (<i>p</i>< 0.05).</p><p><strong>Conclusion: </strong>The findings suggest that a Gentle Brush combined with an ethylene-diamine-tetra-acetic acid washing solution represents the most effective method for canal cleaning and calcium hydroxide removal. This study underscores the importance of employing efficient techniques to enhance treatment quality in endodontic practice.</p>","PeriodicalId":73702,"journal":{"name":"Journal of dentistry (Shiraz, Iran)","volume":"26 4","pages":"325-335"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12627951/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145566269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Accessory Maxillary Sinus Ostium Frequency and Correlation with Anatomical Variables and Sinus Mucosal Status: A CBCT Study.","authors":"Seyyed Hosein Rudbarizade, Fereshteh Goudarzi, Kianoosh Malek Zadeh, Masoomeh Afsa","doi":"10.30476/dentjods.2025.104073.2502","DOIUrl":"10.30476/dentjods.2025.104073.2502","url":null,"abstract":"<p><strong>Background: </strong>The accessory maxillary sinus ostium (AMO) is one of the anatomical variations in the maxillary sinus. The acquired or congenital nature of AMO has not been proven. In theory, mucus drained from the principal ostium may reenter the sinus through the accessory ostium and cause maxillary rhinosinusitis.</p><p><strong>Purpose: </strong>The aim of the present study is to investigate the AMO frequency and its correlation with some anatomical and pathological variables in the area using cone-beam computed tomography (CBCT) images.</p><p><strong>Materials and method: </strong>This was a descriptive-analytical cross-sectional study. CBCT images were obtained from 273 individuals and a total of 461 maxillary sinuses. The presence of AMOs and their relationship with age, sex, sinus mucosa condition, patency of the principal ostium, septal deviation, and sinus dimensions were measured.</p><p><strong>Results: </strong>The AMO frequency was 35.6% and 14.63% of sinuses had more than one AMO. AMO was more common in men. There was a statistically significant relationship between AMO presence and abnormal mucosal status of maxillary sinus. The present study showed a statistically significant relationship between the presence of AMO and the anterior-posterior dimension of the sinus.</p><p><strong>Conclusion: </strong>AMO occurred more frequently in the sinuses with abnormal mucosal status. However, when the abnormal sinus mucosa has reached the nasal fontanelle, it is not possible to check the presence of AMO by CBCT images.</p>","PeriodicalId":73702,"journal":{"name":"Journal of dentistry (Shiraz, Iran)","volume":"26 4","pages":"302-308"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12627953/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145566122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Spatial Study of Head and Neck Cancer Incidence Rate in Fars Province (the South of Iran): 2007-2020.","authors":"Sara Maroufi, Fahimeh Rezazadeh, Sara Haghighat, Naeimehossadat Asmarian, Alireza Kheiri, Hila Raeisi, Mohammad Afifian, Ardalan Banani, Setareh Valanik","doi":"10.30476/dentjods.2025.103364.2444","DOIUrl":"10.30476/dentjods.2025.103364.2444","url":null,"abstract":"<p><strong>Background: </strong>Head and neck cancers (HNCs) are among the top ten most common cancers globally. There is a clear geographical bias in the prevalence of HNCs. More than two-thirds of HNC cases worldwide occur in low- and middle-income countries. Due to the high prevalence of HNCs in Fars province.</p><p><strong>Purpose: </strong>The purpose of this study was to assess the spatial pattern of HNC incidence rates by modeling both the effects of spatial dependence between neighboring regions and risk factors in a Bayesian Poisson model (BYM).</p><p><strong>Materials and method: </strong>In this cross sectional study, from the Center of Cancer Registry in Fars province, data was collected from 1,821 patients diagnosed with HNC. The effects of spatial structure were modeled in a Bayesian spatiotemporal hierarchical model to determine the relative risk and trend of HNC incidence rates. The maps were created geographical variations of HNCs incidence across the 29 counties of the province with classical Standardized Incidence Rate (SIR), BYM model, and spatiotemporal model.</p><p><strong>Results: </strong>The highest crude incidence rates were 0.55 and 0.16 cases per 1,000-person population for HNC and squamous cell carcinoma (SCC), respectively. Spatially, the highest relative risks for HNC and SCC were estimated at 1.36 and 1.34, respectively, in the county of Shiraz, the capital of Fars province. The lowest relative risks for HNC and SCC were estimated at 0.39 and 0.46 per 1,000 persons, respectively, in Gerash County in southern Fars. The findings showed an increasing trend in the HNC incidence rate and a decreasing trend in SCC incidence in this province.</p><p><strong>Conclusion: </strong>Spatial analysis of HNCs revealed a high incidence rate in the northern and northeastern parts of Fars province, which may be attributed to the effects of lifestyle factors and certain pollutants in the region's cold air.</p>","PeriodicalId":73702,"journal":{"name":"Journal of dentistry (Shiraz, Iran)","volume":"26 4","pages":"355-362"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12627956/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145566143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pacinian Neurofibroma of Oral Cavity: A Rare Neurogenic Tumor.","authors":"Sara Amanpour, Reza Malekpour Afshar, Alireza Parastar","doi":"10.30476/dentjods.2025.104390.2527","DOIUrl":"10.30476/dentjods.2025.104390.2527","url":null,"abstract":"<p><p>Pacinian neurofibroma is a rare variant of neurofibroma composed of structures resembling pacinian corpuscles at various stages of maturation. It is a rare neurogenic tumor which has been reported predominantly on hands, and feet, where pressure receptors are typically located. It usually presents as a solitary nodule and is not reported in associated with von Recklinghausen's disease or any other syndrome. The intraoral site is unusual. The purpose of this report is to present a rare case of intra-oral pacinian neurofibroma associated with neurofibromatosis type 1 and to describe its clinical and microscopic features contributing for the best knowledge about this rare entity.</p>","PeriodicalId":73702,"journal":{"name":"Journal of dentistry (Shiraz, Iran)","volume":"26 4","pages":"379-382"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12627952/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145566542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Factors Affecting the Frequency of Maxillofacial Injuries in Jahrom, Iran.","authors":"Amirhossein Samiee Dehpagaee, Esmail Rayatdoost","doi":"10.30476/dentjods.2025.105054.2566","DOIUrl":"10.30476/dentjods.2025.105054.2566","url":null,"abstract":"<p><strong>Background: </strong>Maxillofacial trauma constitutes a major public health concern due to its potential for severe complications and substantial impact on quality of life.</p><p><strong>Purpose: </strong>This study aimed to elucidate the factors influencing the occurrence of maxillofacial trauma in patients presenting with traumatic injuries at Peymaniyeh Hospital in Jahrom, Iran.</p><p><strong>Materials and method: </strong>This cross-sectional study examined trauma patients at Peymaniyeh Hospital in Jahrom, Iran, from April 2022 to March 2023. A census approach included all trauma patients whose data were recorded in the National Trauma Registry of Iran. Data were collected using a tailored checklist that captured demographic and contextual variables along with injury mechanisms. Statistical analyses were performed using SPSS version 22.</p><p><strong>Results: </strong>Of 924 trauma patients, 218 were diagnosed with maxillofacial trauma and 706 with non-maxillofacial trauma. The majority of the trauma patients were male (76.4%), and the distribution of age groups was not statistically different between the two types of injuries (<i>p</i>= 0.571). Univariate analysis revealed that substance (<i>p</i>= 0.007) and alcohol use (<i>p</i>< 0.001), road traffic accidents (RTAs) (<i>p</i>= 0.001), and representation of motorcyclists (<i>p</i>= 0.001) were significantly more prevalent in maxillofacial injury compared to non-maxillofacial injury category. Logistic regression analysis revealed that substance use (OR= 2.04, 95% CI 1.03-3.99, <i>p</i>= 0.040), alcohol consumption (OR= 2.89, 95% CI 1.37-6.09, <i>p</i>= 0.005), and experiencing RTAs (OR= 12.80, 95% CI 6.07-26.98, <i>p</i>< 0.001) and falling (OR= 3.69, 95% CI 1.68-8.11, <i>p</i>= 0.001) were significantly associated with the occurrence of maxillofacial injuries.</p><p><strong>Conclusion: </strong>This study underscores the prominence of RTAs, particularly those involving motorcyclists, as a primary cause of maxillofacial injuries. The significant association between alcohol and substance use and the elevated risk of these injuries is evident. These findings highlight the need for targeted prevention strategies to promote safe driving practices, and implement public health policies aimed at mitigating alcohol and substance use disorder to reduce the incidence of such injuries.</p>","PeriodicalId":73702,"journal":{"name":"Journal of dentistry (Shiraz, Iran)","volume":"26 4","pages":"317-324"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12627946/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145566384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of Some Trace Metals in Head and Neck Squamous Cell Carcinoma: A Case-Control Study.","authors":"Zohreh Dalirsani, Zahra Delavarian, Atessa Pakfetrat, Seyed Isaac Hashemy, Leyla Vazifeh Mostaan, Fahimeh Khaghani, Mahboobeh Taherizadeh, Maede Shokri, Hossein Alavi","doi":"10.30476/dentjods.2025.104402.2534","DOIUrl":"10.30476/dentjods.2025.104402.2534","url":null,"abstract":"<p><strong>Background: </strong>Micronutrients and trace elements have been linked to the development of head and neck squamous cell carcinoma (HNSCC). However, the role of these elements in the etiology of HNSCC remains unclear.</p><p><strong>Purpose: </strong>This study was conducted to investigate the association between micronutrient and trace element levels and the risk of HNSCC.</p><p><strong>Materials and method: </strong>In this case-control study, serum concentrations of iron, selenium, zinc, copper, and calcium were measured in 40 patients with HNSCC and compared to those of 37 healthy subjects. Statistical analysis was conducted using the Mann-Whitney test, Chi-square test, and independent t-test.</p><p><strong>Results: </strong>The mean ages of the case and control groups were 62.80±13.029 and 57.92± 9.367, respectively, with 45% of HNSCC patients and 59.5% of control subjects being male (<i>p</i>= 0.205). Serum concentrations of calcium and copper were higher, and those of selenium, zinc, and iron lower in the case group than in the control group. Adjusted logistic regression showed only copper, calcium, and iron concentrations to be significantly different between the two groups (<i>p</i>= 0.003, <i>p</i>= 0.018, and <i>p</i>= 0.047, respectively).</p><p><strong>Conclusion: </strong>The case group had lower levels of iron, zinc, and selenium, and higher levels of calcium and copper than the control group. Evaluating serum concentrations of these trace metals could be useful for further screening of individuals at high risk.</p>","PeriodicalId":73702,"journal":{"name":"Journal of dentistry (Shiraz, Iran)","volume":"26 4","pages":"309-316"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12627947/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145566115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effect of 1.5 Tesla MRI on Microleakage and Thermal Stability of Stainless Steel and Titanium Orthodontic Brackets: An <i>in vitro</i> Study.","authors":"Maryam Paknahad, Yasaman Ghaedi, Fatemeh Hajipour, Shabnam Ajami","doi":"10.30476/dentjods.2025.105157.2574","DOIUrl":"10.30476/dentjods.2025.105157.2574","url":null,"abstract":"<p><strong>Background: </strong>Fixed orthodontic appliances, such as stainless steel and titanium brackets, might become exposed to magnetic resonance imaging (MRI) during treatment. However, the effects of MRI on microleakage and thermal changes in these brackets have not been thoroughly investigated. This study addresses these gaps to ensure safety and efficacy in patients undergoing orthodontic treatment while exposed to MRI.</p><p><strong>Purpose: </strong>This study investigates and compares the effects of 1.5 tesla (T) MRI exposure on microleakage and temperature changes in stainless steel and titanium orthodontic brackets, evaluating their safety and bond integrity during orthodontic treatment.</p><p><strong>Materials and method: </strong>In this <i>in vitro</i> study, forty non-carious, freshly extracted human maxillary premolars were randomly divided into stainless steel and titanium bracket groups (n=20). Each group was further subdivided into MRI-exposed (case) and non-exposed (control) subgroups. The case subgroups were subjected to a 1.5 T MRI scan for 20 minutes. Microleakage was evaluated using dye penetration under a stereomicroscope, and temperature changes were measured before and after MRI exposure. Statistical analysis included Kruskal-Wallis tests and paired t-tests. Significance was set at <i>p</i> Value <0.05.</p><p><strong>Results: </strong>Microleakage at the enamel-adhesive interface was slightly higher than at the bracket-adhesive interface in all groups, but the differences were not statistically significant (<i>p</i>> 0.05). No significant differences in microleakage or temperature changes were observed between stainless steel and titanium brackets following MRI exposure (<i>p</i>> 0.05).</p><p><strong>Conclusion: </strong>Exposure to a 1.5 T MRI magnetic field does not significantly affect microleakage or temperature changes in stainless steel or titanium brackets. These findings suggest that fixed orthodontic appliances do not need to be removed prior to MRI examinations, provided artifacts or image interference are not a concern.</p>","PeriodicalId":73702,"journal":{"name":"Journal of dentistry (Shiraz, Iran)","volume":"26 4","pages":"346-354"},"PeriodicalIF":0.0,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12627945/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145566567","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}