Aim: The objective of this study is to analyze the stress distribution of root canal treated teeth under occlusal forces and aid in the selection of appropriate materials for teeth with root tip resorption and crown destruction, using the finite element stress analysis method (FEM). Methods: The study was conducted on two-rooted lower molar teeth, divided into five groups. The root length was 14 mm, the crown length was 7.5 mm, and the total length was 21.5 mm. It was assumed that the distal canals were resorbed by 4 mm. Group 1 consisted of untreated intact teeth. Group 2 involved filling the mesial canals with gutta-percha, filling the apical part of the distal canal with 4 mm Mineral Trioxide Aggregate (MTA), and fabricating the crown using glass fiber post and IPS e.max materials. Group 3 involved filling the mesial canals with gutta-percha, filling the apical part of the distal canal with 4 mm Biodentin, and manufacturing the crown using glass fiber post and IPS e.max materials. Group 4: The canals were filled with MTA, and an IPS e.max endocrown was used. Group 5: The canals were filled with Biodentin and an IPS e.max endocrown was used. The study examined the effect of a 100 Newton force applied in the occlusal direction on dental tissues using finite element stress analysis. Results: The study found that the application of fiber posts resulted in less stress accumulation in tooth tissues compared to endocrown. Conclusion: The use of Biodentin or MTA in endocrown teeth did not affect the stress in tooth tissues caused by applied force. In conclusion, while fiber posts increase durability by reducing stress in root-end resorbed teeth, the effect of Biodentin or MTA on stress resistance in dental tissues is limited. How to cite this article: Duran S, Şirin DA, Topbaş C. Finite element stress analysis in mandibular molars with apical root resorption and crown destruction after root canal treatment using various materials. J Med Dent Invest 2024;5:e240320. https://doi.org/10.5577/jomdi.e240320
目的：本研究的目的是利用有限元应力分析方法（FEM）分析根管治疗牙齿在咬合力作用下的应力分布情况，并帮助为根尖吸收和牙冠破坏的牙齿选择合适的材料：研究对象为双根下磨牙，分为五组。牙根长度为 14 毫米，牙冠长度为 7.5 毫米，总长度为 21.5 毫米。假定远端牙槽吸收了 4 毫米。第 1 组包括未经处理的完整牙齿。第 2 组包括用古塔漆填充中轴管，用 4 毫米的矿物三氧化物骨料（MTA）填充远轴管的顶端部分，并用玻璃纤维桩和 IPS e.max 材料制作牙冠。第 3 组：用古塔漆填充中轴管，用 4 毫米生物丹填充远端管的顶端部分，用玻璃纤维桩和 IPS e.max 材料制作牙冠。第 4 组：用 MTA 填补根管，并使用 IPS e.max 内冠。第 5 组：用 Biodentin 填充牙道，并使用 IPS e.max 内冠。该研究利用有限元应力分析方法，研究了在咬合方向施加 100 牛顿力对牙体组织的影响：研究发现，与内冠相比，纤维桩的应用导致牙体组织中的应力累积较少：结论：在内冠牙中使用 Biodentin 或 MTA 不会影响外力对牙体组织造成的应力。总之，虽然纤维桩可通过减少根端吸收牙的应力来提高耐久性，但 Biodentin 或 MTA 对牙体组织抗应力的影响是有限的。本文引用地址：Duran S, Şirin DA, Topbaş C. 使用不同材料进行根管治疗后下颌磨牙根尖吸收和牙冠破坏的有限元应力分析。J Med Dent Invest 2024;5:e240320. https://doi.org/10.5577/jomdi.e240320
{"title":"Finite element stress analysis in mandibular molars with apical root resorption and crown destruction after root canal treatment using various materials","authors":"Serkan Duran, Dursun Ali Şirin, Celalettin Topbaş","doi":"10.5577/jomdi.e240320","DOIUrl":"https://doi.org/10.5577/jomdi.e240320","url":null,"abstract":"Aim: The objective of this study is to analyze the stress distribution of root canal treated teeth under occlusal forces and aid in the selection of appropriate materials for teeth with root tip resorption and crown destruction, using the finite element stress analysis method (FEM).\u0000Methods: The study was conducted on two-rooted lower molar teeth, divided into five groups. The root length was 14 mm, the crown length was 7.5 mm, and the total length was 21.5 mm. It was assumed that the distal canals were resorbed by 4 mm. Group 1 consisted of untreated intact teeth. Group 2 involved filling the mesial canals with gutta-percha, filling the apical part of the distal canal with 4 mm Mineral Trioxide Aggregate (MTA), and fabricating the crown using glass fiber post and IPS e.max materials. Group 3 involved filling the mesial canals with gutta-percha, filling the apical part of the distal canal with 4 mm Biodentin, and manufacturing the crown using glass fiber post and IPS e.max materials. Group 4: The canals were filled with MTA, and an IPS e.max endocrown was used. Group 5: The canals were filled with Biodentin and an IPS e.max endocrown was used. The study examined the effect of a 100 Newton force applied in the occlusal direction on dental tissues using finite element stress analysis.\u0000Results: The study found that the application of fiber posts resulted in less stress accumulation in tooth tissues compared to endocrown.\u0000Conclusion: The use of Biodentin or MTA in endocrown teeth did not affect the stress in tooth tissues caused by applied force. In conclusion, while fiber posts increase durability by reducing stress in root-end resorbed teeth, the effect of Biodentin or MTA on stress resistance in dental tissues is limited.\u0000 \u0000How to cite this article:\u0000Duran S, Şirin DA, Topbaş C. Finite element stress analysis in mandibular molars with apical root resorption and crown destruction after root canal treatment using various materials. J Med Dent Invest 2024;5:e240320. https://doi.org/10.5577/jomdi.e240320\u0000 \u0000 ","PeriodicalId":477171,"journal":{"name":"Journal of Medical and Dental Investigations","volume":" 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140994450","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}
Aim: Deltamethrin (DM), a hydrophobic and lipophilic substance used for insect control, easily accumulates in the body, increasing ROS production and causing mucosal inflammation and damage. The aim of this study was to explore the prophylactic effects of hesperidin on DM toxicity in periodontal membrane. Methods: The study was conducted for 14 days on 21 male Wistar albino rats. The experimental animals were divided into three groups (n=7): The Sham group received 0.9% NaCl (1 mL). The deltamethrin group received 0.5 mg/kg DM (1 mL, dissolved in dimethyl sulfoxide). The deltamethrin + hesperidin group received DM (0.5 mg/kg) + hesperidin (100 mg/kg) (both drugs dissolved in 1 mL dimethyl sulfoxide). All treatments were administered daily via the orogastric route for 14 days. At the end of the experiment, the rats were euthanized by cervical dislocation, and biochemical and histological analyses were performed. Results: The biochemical tests showed significantly higher malondialdehyde (MDA) levels in the deltamethrin group than in the Sham group. Combined application of hesperidin and deltamethrin resulted in significantly lower MDA levels in the deltamethrin + hesperidin group than in the deltamethrin group. Histopathological examination of the periodontal tissues of the deltamethrin group revealed cell degeneration at the alveolar bone-tooth junction, including atypical cells, irregularity in collagen fibers, dilatation and congestion of the blood vessels, and inflammatory cell infiltrates distributed in aggregate and solitary forms. The deltamethrin + hesperidin group showed substantially less cell degeneration. Conclusion: Hesperidin application helped alleviate deltamethrin toxicity by preventing oxidative stress and reducing cell degeneration. How to cite this article: İpek F, Deveci E, İpek P. Effect of hesperidin on deltamethrin toxicity in rat periodontal membrane. J Med Dent Invest 2023;4:e230332. https://doi.org/10.5577/jomdi.e230332 Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.
{"title":"Effect of hesperidin on deltamethrin toxicity in rat periodontal membrane","authors":"Fikret İpek, Engin Deveci, Polat İpek","doi":"10.5577/jomdi.e230332","DOIUrl":"https://doi.org/10.5577/jomdi.e230332","url":null,"abstract":"Aim: Deltamethrin (DM), a hydrophobic and lipophilic substance used for insect control, easily accumulates in the body, increasing ROS production and causing mucosal inflammation and damage. The aim of this study was to explore the prophylactic effects of hesperidin on DM toxicity in periodontal membrane. Methods: The study was conducted for 14 days on 21 male Wistar albino rats. The experimental animals were divided into three groups (n=7): The Sham group received 0.9% NaCl (1 mL). The deltamethrin group received 0.5 mg/kg DM (1 mL, dissolved in dimethyl sulfoxide). The deltamethrin + hesperidin group received DM (0.5 mg/kg) + hesperidin (100 mg/kg) (both drugs dissolved in 1 mL dimethyl sulfoxide). All treatments were administered daily via the orogastric route for 14 days. At the end of the experiment, the rats were euthanized by cervical dislocation, and biochemical and histological analyses were performed. Results: The biochemical tests showed significantly higher malondialdehyde (MDA) levels in the deltamethrin group than in the Sham group. Combined application of hesperidin and deltamethrin resulted in significantly lower MDA levels in the deltamethrin + hesperidin group than in the deltamethrin group. Histopathological examination of the periodontal tissues of the deltamethrin group revealed cell degeneration at the alveolar bone-tooth junction, including atypical cells, irregularity in collagen fibers, dilatation and congestion of the blood vessels, and inflammatory cell infiltrates distributed in aggregate and solitary forms. The deltamethrin + hesperidin group showed substantially less cell degeneration. Conclusion: Hesperidin application helped alleviate deltamethrin toxicity by preventing oxidative stress and reducing cell degeneration. How to cite this article: İpek F, Deveci E, İpek P. Effect of hesperidin on deltamethrin toxicity in rat periodontal membrane. J Med Dent Invest 2023;4:e230332. https://doi.org/10.5577/jomdi.e230332 Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.","PeriodicalId":477171,"journal":{"name":"Journal of Medical and Dental Investigations","volume":"152 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136261609","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}
In the case, we aim to point out the way to manage the cataract with nystagmus under topical anesthesia in phacoemulsification surgery. A 62-year-old female patient came to department of ophthalmology in January 2020 with a complaint of blurry vision in her right eye for a year. The observed visual acuity of the subject's right eye was measured to be 0.15. During the biomicroscopic examination, the presence of bilateral nystagmus and cortical cataract was observed. The iris and retina were found to be undamaged. No lens subluxation was seen. Under topical anesthesia in phacoemulsification surgery, globe stabilization was provided by holding the conjunctival pouch. With one hand and with the other hand, capsulorhexis, the most critical part of the operation was achieved. The case we present is close to point out the easy method to explain to manage this kind of cataracts. How to cite this article: Alaçamlı G. How to manage the cataract with nystagmus under topical anesthesia: A case report. J Med Dent Invest 2023;4:e230329. https://doi.org/10.5577/jomdi.e230329 Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.
{"title":"How to manage the cataract with nystagmus under topical anesthesia: A case report","authors":"Göksu Alaçamlı","doi":"10.5577/jomdi.e230329","DOIUrl":"https://doi.org/10.5577/jomdi.e230329","url":null,"abstract":"In the case, we aim to point out the way to manage the cataract with nystagmus under topical anesthesia in phacoemulsification surgery. A 62-year-old female patient came to department of ophthalmology in January 2020 with a complaint of blurry vision in her right eye for a year. The observed visual acuity of the subject's right eye was measured to be 0.15. During the biomicroscopic examination, the presence of bilateral nystagmus and cortical cataract was observed. The iris and retina were found to be undamaged. No lens subluxation was seen. Under topical anesthesia in phacoemulsification surgery, globe stabilization was provided by holding the conjunctival pouch. With one hand and with the other hand, capsulorhexis, the most critical part of the operation was achieved. The case we present is close to point out the easy method to explain to manage this kind of cataracts. How to cite this article: Alaçamlı G. How to manage the cataract with nystagmus under topical anesthesia: A case report. J Med Dent Invest 2023;4:e230329. https://doi.org/10.5577/jomdi.e230329 Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.","PeriodicalId":477171,"journal":{"name":"Journal of Medical and Dental Investigations","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135696653","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}
Aim: This study aimed to evaluate the approaches that dentists working in Turkey take to retreatment. Methods: A questionnaire with 16 questions regarding gender, institution, specialty, experience, and root canal treatment stages was distributed to 223 dentists. The collected questionnaires were analyzed in R 4.0.0 programming language. A chi-square test analyzed the categorical variables. The statistical analyses were performed at a 5% significance level. Results: A statistically significant relationship was found between the years spent practicing dentistry and the methods of determining the length of root canal treatment (p < 0.05). The relationship between the choices of irrigation agents for canal treatment and the professional title was found to be statistically significant (p < 0.05). No significant relationship was found between gender and other parameters (p > 0.05). A statistically significant difference was found between the treatment protocol applied in molar teeth with lesions, the success rate of the patients who underwent retreatment, and the practitioners’ specializations (p < 0.05). The relationship between retreatment in unsuccessful root canal treatments and the institution studied was also statistically significant (p < 0.05). A total of 66% of dentists working in Oral and Dental Health Center, 88% of dentists working in private clinics, and 90% of dentists working at universities reported that they performed retreatment. The relationships among the frequency of endodontic treatment, the use of magnification while performing root canal treatment, the group of teeth that was most often treated, and the institutions in which dentists work were also found to be statistically significant. Conclusion: In this survey study, which was conducted to evaluate the practice of endodontic treatment, the rate of dentists performing endodontic treatments was found to have increased. Endodontists performed retreatment cases at a higher rate than general practitioners. Dentists with less professional experience had higher rates of endodontic treatment for difficult–to–treat molars than those with more professional experience. How to cite this article: Tellioğlu Avcı GR. Evaluation of dentists’ approach to retreatment in Turkey: A survey study. J Med Dent Invest 2023;4:e230314. https://doi.org/10.5577/jomdi.e230324 Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.
{"title":"Evaluation of dentists’ approach to retreatment in Turkey: A survey study","authors":"Güliz Rana Tellioğlu Avcı","doi":"10.5577/jomdi.e230324","DOIUrl":"https://doi.org/10.5577/jomdi.e230324","url":null,"abstract":"Aim: This study aimed to evaluate the approaches that dentists working in Turkey take to retreatment. Methods: A questionnaire with 16 questions regarding gender, institution, specialty, experience, and root canal treatment stages was distributed to 223 dentists. The collected questionnaires were analyzed in R 4.0.0 programming language. A chi-square test analyzed the categorical variables. The statistical analyses were performed at a 5% significance level. Results: A statistically significant relationship was found between the years spent practicing dentistry and the methods of determining the length of root canal treatment (p < 0.05). The relationship between the choices of irrigation agents for canal treatment and the professional title was found to be statistically significant (p < 0.05). No significant relationship was found between gender and other parameters (p > 0.05). A statistically significant difference was found between the treatment protocol applied in molar teeth with lesions, the success rate of the patients who underwent retreatment, and the practitioners’ specializations (p < 0.05). The relationship between retreatment in unsuccessful root canal treatments and the institution studied was also statistically significant (p < 0.05). A total of 66% of dentists working in Oral and Dental Health Center, 88% of dentists working in private clinics, and 90% of dentists working at universities reported that they performed retreatment. The relationships among the frequency of endodontic treatment, the use of magnification while performing root canal treatment, the group of teeth that was most often treated, and the institutions in which dentists work were also found to be statistically significant. Conclusion: In this survey study, which was conducted to evaluate the practice of endodontic treatment, the rate of dentists performing endodontic treatments was found to have increased. Endodontists performed retreatment cases at a higher rate than general practitioners. Dentists with less professional experience had higher rates of endodontic treatment for difficult–to–treat molars than those with more professional experience. How to cite this article: Tellioğlu Avcı GR. Evaluation of dentists’ approach to retreatment in Turkey: A survey study. J Med Dent Invest 2023;4:e230314. https://doi.org/10.5577/jomdi.e230324 Linguistic Revision: The English in this manuscript has been checked by at least two professional editors, both native speakers of English.","PeriodicalId":477171,"journal":{"name":"Journal of Medical and Dental Investigations","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136341575","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}
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