Journal of Craniomaxillofacial Research最新文献_第2页

Evaluation of stress and strain on surgical screws and plates in mandibular trunk fractures at different positions of plates and screws: Finite Element Analysis 评估下颌骨躯干骨折时手术螺钉和钢板在不同钢板和螺钉位置上的应力和应变：有限元分析

Journal of Craniomaxillofacial Research Pub Date : 2024-04-07 DOI: 10.18502/jcr.v10i4.15312

Arian Sadeghi, Alireza Parhiz

{"title":"Evaluation of stress and strain on surgical screws and plates in mandibular trunk fractures at different positions of plates and screws: Finite Element Analysis","authors":"Arian Sadeghi, Alireza Parhiz","doi":"10.18502/jcr.v10i4.15312","DOIUrl":"https://doi.org/10.18502/jcr.v10i4.15312","url":null,"abstract":"Introduction: To determine the most appropriate method for placement of plates and screws in terms of stress in mandibular body fractures using finite element analysis. \u0000Methods: First a model of the mandible reconstructed with Mimics software. This study employed various methods, including plates positioned parallel to the inferior border of the mandible with screws perpendicular to the bone; plates parallel to the inferior border of the mandible fixed with screws oriented at a 45-degree to the fracture line; plates positioned perpendicular to the fracture line fixed with screws perpendicular to the bone; plates perpendicular to the fracture line and fixed with screws oriented at a 45-degree to the fracture line. Then the software measured the stress within the screws and plates in each condition under the maximum bite force. \u0000Results: It was observed that in cases of favorable horizontal fractures, the stress exerted on the plates and bones is greater when the plates are aligned parallel to the lower border of mandible, compared to when the plates are positioned perpendicular to the fracture line. In the study of unfavorable horizontal fractures, when the plates were fixed perpendicular to the fracture line, higher magnitudes of stress were recorded compared to the stress observed in the plates positioned parallel to the inferior border of the mandible. \u0000Conclusion: In cases of mandibular body fractures with favorable horizontal orientations, the use of fixation techniques involving plates perpendicular to the fracture line is preferred due to the reduced stress exerted on the plates. In the unfavorable horizontal fractures, the stress levels do not exhibit significant variation between different fixations. Finally, it is not advisable to utilize screws positioned at a 45-degree angle to the fracture line, as it can lead to an increase in the displacement of the plates.","PeriodicalId":52622,"journal":{"name":"Journal of Craniomaxillofacial Research","volume":"53 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140733529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Knowledge, attitude and practice toward using dental magnification 使用牙科放大镜的知识、态度和实践

Journal of Craniomaxillofacial Research Pub Date : 2024-01-02 DOI: 10.18502/jcr.v10i3.14634

Nooshin Fakhari, Fatemeh Ayatollahi, Zahra Jafary Nodoushan, Sahar Chokami Rafiei, Mohammad Sadat

{"title":"Knowledge, attitude and practice toward using dental magnification","authors":"Nooshin Fakhari, Fatemeh Ayatollahi, Zahra Jafary Nodoushan, Sahar Chokami Rafiei, Mohammad Sadat","doi":"10.18502/jcr.v10i3.14634","DOIUrl":"https://doi.org/10.18502/jcr.v10i3.14634","url":null,"abstract":"Objectives: Dentistry is not only an evolving science but also an art with good eye-hand coordination. A variety of magnification devices are used in dentistry to increase the clarity and accuracy of examinations and surgeries. The purpose of this study is to evaluate knowledge, attitude and practice toward using dental magnification among dental residents and dental professors. \u0000Material and methods: In this cross-sectional descriptive study, all professors and residents were studied by census. A questionnaire was administered to the clinical faculty to assess three parameters: knowledge, attitudes and practice of magnification devices among dental residents and masters. The questionnaire consisted of 4 parts: demographic information, knowledge (11 questions), attitude (7 questions), and practice (4 questions). Data were analyzed by SPSS 23 statistical software and analyzed by T-tests and one-way analysis of variance (ANOVA) and Chi-Square. \u0000Main results: A total of 81 dentists completed the research questionnaire, of which 50 (61.7%) were male and 31 (38.3%) were female. Most dentists answered knowledge questions about depth and field of view changes with increasing magnification and the ability to adjust eye convergence under a microscope (74.1%). Also, the results of ANOVA statistical test did not show a significant difference between the scores of dentists' attitudes according to the field of specialization. \u0000Conclusions: Although the skill of dentists was acceptable at using magnifying devices, they had little knowledge about the importance of this issue. The most important reasons were mentioned lack of access and high cost of using these devices.","PeriodicalId":52622,"journal":{"name":"Journal of Craniomaxillofacial Research","volume":"34 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139389730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Coincidence of nasopalatine duct cyst and dentigerous cyst: a rare case report 鼻腭管囊肿和齿状突起囊肿并发症：罕见病例报告

Journal of Craniomaxillofacial Research Pub Date : 2024-01-02 DOI: 10.18502/jcr.v10i3.14635

Ali Sadeghian, Anita Taheri, P. Bakhshaei

引用次数: 0

Oral and maxillofacial complications of COVID-19 infection; a Review COVID-19 感染引起的口腔和颌面部并发症；综述

Journal of Craniomaxillofacial Research Pub Date : 2024-01-02 DOI: 10.18502/jcr.v10i3.14630

Farzaneh Bolandparva, Mona Mohajeri Tehrani, Najmeh Heydari

{"title":"Oral and maxillofacial complications of COVID-19 infection; a Review","authors":"Farzaneh Bolandparva, Mona Mohajeri Tehrani, Najmeh Heydari","doi":"10.18502/jcr.v10i3.14630","DOIUrl":"https://doi.org/10.18502/jcr.v10i3.14630","url":null,"abstract":"Introduction: The SARS-CoV-2 virus is a group of viruses that cause disease in birds and mammals and currently has more than 398.572.320 infected and 5.770.578 victims worldwide. Common clinical symptoms are fever, headache, dyspnea, sore throat, dry cough, abdominal pain, diarrhea, and nausea. On the other hand, the results of various studies related to oral and maxillofacial manifestations in patients with COVID-19 have reported contradictory results in different places, which shows the role of different geographical and individual factors in the occurrence of oral manifestations. The aim of the present study was to review the oral and maxillofacial manifestations in patients with or improved COVID-19 infection. \u0000Materials and Methods: This study is a narrative review. In this study, research published in Pubmed, Google Scholar and Scopus databases has been reviewed by a review method and with a keyword search strategy. \u0000Results: 4011 articles were found from the mentioned databases, and after deleting unrelated researches (3607 cases) and duplicate researches (358 cases), 46 articles remained for final review. Then, from this number, those research that were presented in the scientific conference and were in the form of abstracts or did not have a correct statistical population were excluded from the study (10 cases). \u0000Conclusion: COVID-19 is a new and rapidly evolving disease, and many of its features, including its associated oral manifestations, are still under investigation. No agreement has yet been reached on the nature and classification of oral lesions in COVID-19 and their causal relationship to disease progression. This limitation is reflected in systematic reviews such as the present article. In addition, there is a significant shortage of high-quality studies on the prevalence of these oral manifestations and this limitation affects the prevalence estimates presented in this study.","PeriodicalId":52622,"journal":{"name":"Journal of Craniomaxillofacial Research","volume":"97 13","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139390265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Squamous cell carcinoma in young adult with no predisposing factors: A case report 无诱发因素的年轻成人鳞状细胞癌：病例报告

Journal of Craniomaxillofacial Research Pub Date : 2024-01-02 DOI: 10.18502/jcr.v10i3.14636

A. Mohiti, Aida Nali, Arsalan Ghavimi, Nadia Derakhshan

引用次数: 0

A case-control study of evaluating oral squamous cell carcinoma (scc) risk factors in the Iranian population 评估伊朗人口口腔鳞状细胞癌（scc）风险因素的病例对照研究

Journal of Craniomaxillofacial Research Pub Date : 2024-01-02 DOI: 10.18502/jcr.v10i3.14632

A. Garajei, Narges Hajiani, A. Emami

{"title":"A case-control study of evaluating oral squamous cell carcinoma (scc) risk factors in the Iranian population","authors":"A. Garajei, Narges Hajiani, A. Emami","doi":"10.18502/jcr.v10i3.14632","DOIUrl":"https://doi.org/10.18502/jcr.v10i3.14632","url":null,"abstract":"Purpose: Oral Squamous Cell Carcinoma is the 6th most prevalent cancer worldwide. The global increase in frequency and mortality of oral SCC has been shown. There are few studies about the risk factors for oral SCC in Iran. This study is based on finding a possible relationship between oral SCC and some lifestyle factors in the Iranian population. \u0000Materials and Methods: This case-control study was conducted at the Iran Cancer Institute in Tehran. The controls were matched to the cases by age and gender and socio-economic status. A number of 204 individuals (102 cases and 102 controls) were interviewed by using a structured questionnaire to obtain data regarding oral hygiene, dietary factors, smoking habits, alcohol consumption and lifestyle risk factors for oral squamous cell carcinoma. Results were analyzed by chi-square and Fisher exact test. P values less than 0.05 were considered significant. \u0000Results: The mean age of cases at diagnosis was 60.03 years and 52.9% were male. The analysis showed that poor oral hygiene, low intake of fruits and vegetables (P<0.001), low intake of dairy (P=0.029), alcohol consumption (P=0.015), cigarette smoking (P=0.002) in years and pack per year of smoking (P<0.001) are independent risk factors for oral SCC. \u0000Conclusion: The study provided strong evidence that poor oral hygiene, poor dietary factors, smoking habits and alcohol consumption play an etiological role for oral SCC in the Iranian population.","PeriodicalId":52622,"journal":{"name":"Journal of Craniomaxillofacial Research","volume":"10 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139452520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Odontogenic lesions associated with impacted teeth: A 5-year retrospective institutional study 与阻生牙相关的牙源性病变：一项为期 5 年的机构回顾性研究

Journal of Craniomaxillofacial Research Pub Date : 2024-01-02 DOI: 10.18502/jcr.v10i3.14631

Reza Vaez, Monir Moradzadeh Khiavi, Khadijeh Abdal, Hossein Borhani

{"title":"Odontogenic lesions associated with impacted teeth: A 5-year retrospective institutional study","authors":"Reza Vaez, Monir Moradzadeh Khiavi, Khadijeh Abdal, Hossein Borhani","doi":"10.18502/jcr.v10i3.14631","DOIUrl":"https://doi.org/10.18502/jcr.v10i3.14631","url":null,"abstract":"Introduction: Odontogenic lesions related to impacted teeth are common findings in routine dental exams, with the potential to cause tooth pain, displacement, bone expansion, or even bone erosion. Thus, their early detection is important. This study aimed to evaluate the frequency of such lesions based on patient age, gender, and location at the Tehran University of Medical Sciences, School of Dentistry, over five years. \u0000Materials and Methods: This retrospective study evaluated records from the Oral Pathology Department, covering a five-year period. The association of odontogenic lesions with impacted teeth was assessed. Data on lesion type, patient age and gender, involved jaw, lesion location, and affected teeth were extracted from patient records. Statistical analysis was performed using SPSS 24. \u0000Results: Out of 815 odontogenic lesions, 44.4% were associated with impacted teeth. The patient distribution was 52.48% male and 47.52% female. Lesions were most prevalent in the third decade of life (24.58%), and third molars (59.39%) were frequently involved. The posterior mandible (68.5%) and mandibular third molar (55%) were common sites. Dentigerous cysts had the highest frequency (35.4%), with odontogenic cysts (developmental) occurring more frequently (70.7%) than odontogenic tumors. \u0000Conclusion: The study underscores a significant association between odontogenic lesions and impacted or unerupted teeth. Periodic follow-ups are crucial for retaining impacted teeth based on these findings.","PeriodicalId":52622,"journal":{"name":"Journal of Craniomaxillofacial Research","volume":"50 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139452827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Prevalence of recurrent aphthous ulcers among dentistry students and its association with anxiety 口腔医学学生中复发性口腔溃疡的患病率及其与焦虑的关系

Journal of Craniomaxillofacial Research Pub Date : 2024-01-02 DOI: 10.18502/jcr.v10i3.14633

Maryam Basirat, Zahra Elmi, Sina Shateri, Mahnaz Fallahi, Fereshteh Najar Karimi

{"title":"Prevalence of recurrent aphthous ulcers among dentistry students and its association with anxiety","authors":"Maryam Basirat, Zahra Elmi, Sina Shateri, Mahnaz Fallahi, Fereshteh Najar Karimi","doi":"10.18502/jcr.v10i3.14633","DOIUrl":"https://doi.org/10.18502/jcr.v10i3.14633","url":null,"abstract":"Objective: Recurrent aphthous stomatitis (RAS) is a common ulcerative inflammatory condition of the oral mucosa. Considering the contradictory findings of previous research about the association between anxiety and RAS, the present study aimed to determine the prevalence of RAS and its association with anxiety among dentistry students. \u0000Methods: In this descriptive-analytical study, a total of 241 dentistry students of G. University were divided into two groups (those with a history of RAS and healthy subjects) after recording their demographic and required information. Also, Cattell’s questionnaire was used to evaluate the level of anxiety. The results were analyzed using SPSS v.21 software, and a p-value of <0.05 was considered statistically significant. \u0000Results: 2.40% of subjects suffered from RAS. This condition was more prevalent in winter, and its incidence was significantly different between the two groups in terms of the presence of a family history of RAS (p=0.01), food allergy (p=0.05), and regular exercise (p=0.040). Subjects with RAS had a significantly higher anxiety intensity in the areas of lack of ego strength, superego susceptibility, and ergic tension compared to subjects without RAS (p<0.0001). \u0000Conclusion: The results showed that some areas of anxiety, including lack of ego strength, can be predictors of RAS. Therefore, teaching life skills such as anxiety management and its timely diagnosis and treatment can play an essential role in the prevention and treatment of RAS.","PeriodicalId":52622,"journal":{"name":"Journal of Craniomaxillofacial Research","volume":"53 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139390182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new osteotomy for mandibular sagittal split osteotomy 一种新的下颌矢状面劈裂截骨术

Journal of Craniomaxillofacial Research Pub Date : 2023-11-13 DOI: 10.18502/jcr.v10i2.14055

Amirmohammad Arabi Daredor, Alireza Parhiz, Amirali Asadi

引用次数: 0

Reconstruction of alveolar defects with regenerative properties of adipose-derived stem cells 脂肪源性干细胞再生肺泡缺损的重建

Journal of Craniomaxillofacial Research Pub Date : 2023-11-12 DOI: 10.18502/jcr.v10i2.14050

Mohammad Bayat, Sarvenaz Karimi Aval, Mohammad Hosein Amirzade, Abdolreza Mohamadnia, Naghmeh Bahrami

{"title":"Reconstruction of alveolar defects with regenerative properties of adipose-derived stem cells","authors":"Mohammad Bayat, Sarvenaz Karimi Aval, Mohammad Hosein Amirzade, Abdolreza Mohamadnia, Naghmeh Bahrami","doi":"10.18502/jcr.v10i2.14050","DOIUrl":"https://doi.org/10.18502/jcr.v10i2.14050","url":null,"abstract":"Introduction: Loss of tissue and dysfunction of body organs due to injuries and diseases have caused serious health problems despite the vast advances in Medicien. Bone repair through tissue engineering is one of the most important areas of attention for specialists in a wide range of de- partments, including orthopedics and maxillofacial surgeries. Materials and Methods: This case-series describes efficient clinical applications of adi- pose-derived stem cells (AdSCs) in combination with conventional guided bone regeneration as protected healing space for reconstruction of large alveolar defects after hemi-mandibulectomy. Results: As the result, this approach represented a considerable amount of three-dimensional bone formation in presented cases. Regenerating this amount of resected bone tissue rehabilitates the patients and gives clinicians a sufficient amount of bone and opportunity to insert dental implants to retrieve patients’ function and aesthetic. Conclusion: The application of AdSCs can be considered as an efficient treatment for bone regeneration in large alveolar bone defects.","PeriodicalId":52622,"journal":{"name":"Journal of Craniomaxillofacial Research","volume":"25 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135037180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0