Journal of Clinical and Experimental Dentistry最新文献

{"title":"Compressive strength evaluation of two composites with and without fiber reinforcement used as restorative material in incisal edge: An <i>In-vitro</i> study.","authors":"P V S Tejaswini Yadav Sagala, Sayesh Vemuri, Anila Bandlapally Sreenivasa Guptha, Roopadevi Garlapati, Tsalla Krishna Ravali, Maddarapu Vamsi Krishna","doi":"10.4317/jced.62410","DOIUrl":"https://doi.org/10.4317/jced.62410","url":null,"abstract":"<p><strong>Background: </strong>To evaluate compressive strength of two composites with and without fiber reinforcement used as restorative material in incisal edge.</p><p><strong>Material and methods: </strong>Sixty extracted human maxillary incisors were collected and divided into four groups (n=15). In group 1and 3: fracture line is beveled circumferentially, etched with 37% phosphoric acid gel for 15 seconds, bonding agent applied, and the lost tooth structure was incrementally built with nano-composites. In group 2 and 4: grooves are prepared for placing fibers. Fracture line is beveled circumferentially, fiber is placed into the flowable composite in the prepared groove area and remaining portion built incrementally with nano-composite. All samples were subjected to universal testing machine to evaluate compressive strength and observed in stereomicroscope to analyze mode of failure. The obtained data is analyzed using one-way ANOVA and Tukey's Post-hoc tests.</p><p><strong>Results: </strong>Group 2 and 4 showed significantly higher fracture resistance. No significant difference is observed between group 1 and 3, group 2 and 4. More mixed failure were seen in group 1 and 3 and cohesive failures in group 2 and 4.</p><p><strong>Conclusions: </strong>Fiber reinforced composites have higher compressive strength which can be used as an treatment option for incisal edge fractures. <b>Key words:</b>Compressive strength, Failure modes, Fibers, Nanocomposites, Stereomicroscope, Universal testing machine.</p>","PeriodicalId":15376,"journal":{"name":"Journal of Clinical and Experimental Dentistry","volume":"17 2","pages":"e168-e173"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11907350/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143648778","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":"Tooth pain accompanying cluster headache in a middle-aged female: A case report.","authors":"Sana Ohnuma, Keita Takizawa, Kana Ozasa, Andrew Young, Noboru Noma","doi":"10.4317/jced.62454","DOIUrl":"https://doi.org/10.4317/jced.62454","url":null,"abstract":"<p><p>Some orofacial pains (OFP) resemble primary headache disorders, but involve the trigeminal nerve V2 or V3 dermatome. The International Classification of Orofacial Pain (ICOP) distinguishes three types of such OFPs: Type 1 (facial pain in addition to headaches), Type 2 (facial pain replacing a previous primary headache), and Type 3 (OFP similar to primary headaches, without a history of headaches). This report describes a 46-year-old female patient with a chief complaint of toothache and severe pain radiating to the left orbital region, and with accompanying autonomic signs and symptoms. The pain persisted despite dental treatments, leading to a diagnosis of cluster headache. The OFP initially matched the Type 1 description, but later changed to match the Type 2 description. This case highlights the need to differentiate nonodontogenic from odontogenic pain for accurate diagnosis and treatment. <b>Key words:</b>cluster headache, autonomic symptoms, Orofacial pain.</p>","PeriodicalId":15376,"journal":{"name":"Journal of Clinical and Experimental Dentistry","volume":"17 2","pages":"e229-e232"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11907343/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143648856","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":"Prevalence and morphology of lower second molars with C-Shaped canals: A CBCT analysis.","authors":"Elisabet Mingo, María Noguera, Francisca Jiménez, Maria Llüisa Ballester, Esther Berástegui","doi":"10.4317/jced.62368","DOIUrl":"https://doi.org/10.4317/jced.62368","url":null,"abstract":"<p><strong>Background: </strong>This study aimed to assess the prevalence and morphology of lower second molars with C-shaped configuration among patients at the University of Barcelona Dental Hospital using cone beam computed tomography (CBCT).</p><p><strong>Material and methods: </strong>CBCT images of 408 patients, comprising 792 lower second molars, were examined to identify C-shaped canals and evaluate their anatomical characteristics. Inclusion criteria required patients to have both lower second molars present. The configuration of C-shaped canals was categorised at three axial root levels. The variables of symmetry, position, gender and age were analysed.</p><p><strong>Results: </strong>Out of the 792 lower second molars analysed, a total of 65 molars with C-shaped canals were identified in 42 patients, representing a prevalence of 10.2%. The prevalence in females (12.6%) was significantly higher than in males (6.5%). Bilaterality was observed in 54.76% of individuals with C-shaped molars. The C1 configuration was most frequently observed in the coronal third (56%), while the C2 configuration was equally distributed between the coronal and middle thirds (44.1%). The C3 configuration was most prevalent in the middle third (41.4%), and the C4 configuration was predominantly observed in the apical third (96%). Variations in configurations along the root were observed in 70.8% of the molars. The longitudinal groove was predominantly located on the lingual surface of the roots (83.1%).</p><p><strong>Conclusions: </strong>CBCT is a useful tool to analyse the morphology of the root canal system. <b>Key words:</b>C-shape, anatomy, prevalence studies, root canal, Cone beam computed tomography, mandibular second molar.</p>","PeriodicalId":15376,"journal":{"name":"Journal of Clinical and Experimental Dentistry","volume":"17 2","pages":"e160-e167"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11907342/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143648854","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":"Can charcoal-based dentifrices change the color stability and roughness of bleached tooth enamel and resin composites?","authors":"Murilo Guimarães Campolina, Priscila Agustinha Neves de Souza, Lia Dietrich, Carlos José Soares, Ceci Nunes Carvalho, Hugo Lemes Carlo, Gisele Rodrigues Silva","doi":"10.4317/jced.62319","DOIUrl":"https://doi.org/10.4317/jced.62319","url":null,"abstract":"<p><strong>Background: </strong>Given the increasing prevalence of individuals using charcoal-based dentifrices over extended periods without professional oversight, concerns have emerged regarding their potential effects. This study aimed to investigate the influence of different charcoal-based products on color change (ΔE00), gloss stability, and surface roughness of dental enamel (Intact or bleached) and resin composites subjected to 12-month simulated brushing.</p><p><strong>Material and methods: </strong>132 bovine crowns were randomly allocated and restored with either SS-single-shade or conventional multi-shade, NH-nanohybrid, NF- nano-filled, or BF- bulk-fill composite. A conventional toothpaste (Control), a charcoal-based toothpaste (DC) , and a charcoal-based toothpowder (PO) were evaluated corresponding to 1-, 2-, 6-, and 12-month simulated tooth brushing, respectively. Color (ΔE00) and surface roughness (Ra) were assessed at baseline and after each brushing (n=11). Gloss (GU) was assessed before and after brushing. The brushing products, as well as the enamel and composite surfaces, were analyzed using scanning electron microscopy. Color change, gloss stability, and surface roughness were analyzed by a three-way repeated-measures analysis of variance followed by Tukey's test (α=0.05).</p><p><strong>Results: </strong>Significant differences were found for composite color change (ΔE00) based on brushing product (<i>P</i><0.001), brushing time (<i>P</i><0.001), and their interaction (<i>P</i><0.001), with similar changes across charcoal-based and conventional toothpaste. After 12 months of brushing with toothpowder (PO), all composites exceeded the acceptable ΔE00 threshold. Gloss values decreased significantly (<i>P</i><0.001), with greater losses in NF and NH resins. Roughness (Ra) also increased more with PO than with toothpaste. Both PO and DC significantly reduced enamel gloss, especially on bleached enamel.</p><p><strong>Conclusions: </strong>Charcoal-based toothpaste alters the morphology, roughness, gloss, and color of enamel and resin composite, similar to regular toothpaste. Toothpowder creates surface irregularities, decreasing the gloss and increasing the color change and roughness, more strongly impacting bleached enamel and composites after 12-month simulated tooth brushing. <b>Key words:</b>Activated charcoal toothpaste, roughness, gloss, color change, tooth abrasion.</p>","PeriodicalId":15376,"journal":{"name":"Journal of Clinical and Experimental Dentistry","volume":"17 2","pages":"e149-e159"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11907344/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143648711","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":"Impact of probable bruxism on the oral health-related quality of life among police officers and their relatives.","authors":"Jenny Teresa Atuncar-Salazar, Gustavo Augusto Huertas-Mogollón, Evelyn Alvarez Vidigal, Roxana Patricia López-Ramos","doi":"10.4317/jced.62500","DOIUrl":"https://doi.org/10.4317/jced.62500","url":null,"abstract":"<p><strong>Background: </strong>Bruxism is a global oral disorder that can negatively affect oral health-related quality of life (OHRQoL). Nonetheless, there are few studies regarding police officers. The aim of this study was to determine the impact of probable bruxism on quality of life among police officers and their relatives.</p><p><strong>Material and methods: </strong>This cross-sectional study included 243 police officers, and their relatives aged 18-70 years who attended the dental service of a Peruvian National Police Hospital. They were evaluated through a questionnaire of probable bruxism, including a clinical oral examination. The Oral Health Impact Profile (OHIP-14) questionnaire was also used to determine the impact of OHRQoL. Univariate and bivariate statistical analyses were performed. In addition, multivariate analysis was performed via the statistical program STATA version 18.</p><p><strong>Results: </strong>The mean OHIP-14 score was 13.4 ± 8.0, and 48.6% of the participants had probable bruxism. Statistically significant differences were found in questionnaire domains such as physical pain (<i>p</i>=0.001), psychological distress (<i>p</i>=0.012), social disability (<i>p</i>=0.002) and handicap (<i>p</i>=0.007). Multivariate analysis, adjusted for age in years, sex, type of insurance, level of education and degree of dental wear showed the mean OHIP-14 total score was 2.38 points higher in patients with probable bruxism (95% CI; 0.75, 4.71).</p><p><strong>Conclusions: </strong>Probable bruxism had a negative impact on the oral health-related quality of life of police officers and their relatives. <b>Key words:</b>Bruxism, quality of life, adults.</p>","PeriodicalId":15376,"journal":{"name":"Journal of Clinical and Experimental Dentistry","volume":"17 2","pages":"e142-e148"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11907354/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143648851","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":"Barrier Effects of a poly (lactic acid/caprolactone) Bilayer Membrane for Guided Bone Regeneration on Skull without Periosteum of Adult-Senior Staged Rats.","authors":"Masaru Murata, Md Arafat Kabir, Naohiro Horie, Kenji Yokozeki, Mamata Shakya, Kaoru Kusano","doi":"10.4317/jced.62490","DOIUrl":"https://doi.org/10.4317/jced.62490","url":null,"abstract":"<p><strong>Background: </strong>Vertical and horizontal bone augmentation is one of the most challenging techniques in bone engineering. The use of barrier membranes and scaffolds in guided bone regeneration (GBR) procedures is a common approach for the treatment of lost bone around teeth and dental implants. The aim of this study was to estimate the barrier effects of a synthetic poly (lactic acid/caprolactone) [P(LA/CL)] bilayer membrane for GBR, compared to a porcine collagen bilayer membrane, in the vertical augmentation model on 10-12-months old rat skull without periosteum.</p><p><strong>Material and methods: </strong>The hydroxyapatite (HAp) block (diameter: 4 mm, height: 3 mm, porosity:75%, average pore size:150 μm) was placed on the rat skull without a periosteum. The P(LA/CL) membrane (solid layer: 25 μm, porous layer: 175 μm) or the collagen membrane (solid layer, porous layer) was applied onto the HAp block. At 3, 6, and 12 weeks after the surgery, the incised tissues were fixed, decalcified, and stained with hematoxylin and eosin for histological evaluation.</p><p><strong>Results: </strong>The P(LA/CL) membrane remained until 12 weeks and could achieve barrier effects to inhibit cellular invasion from the repositioned soft tissues. Local bone formation occurred in the interconnected pores of HAp at 6 weeks. On the other hand, the collagen membrane did not inhibit cellular invasion for its expansion until 3 weeks, and was absorbed until 6 weeks. Histomorphometrically, bone in the P(LA/CL)/HAp at 6 and 12 weeks occupied 8.3 % and 10.0 %, respectively, while bone was not formed in the pores of the upper half area in the collagen/HAp.</p><p><strong>Conclusions: </strong>The results in the biomimetic model indicated that the P(LA/CL) membrane might be effective in GBR as an occlusive and absorbable membrane. <b>Key words:</b>Guided bone regeneration (GBR), bone, augmentation, absorbable, membrane, collagen, hy-droxyapatite; P(LA/CL), biomimetic.</p>","PeriodicalId":15376,"journal":{"name":"Journal of Clinical and Experimental Dentistry","volume":"17 2","pages":"e211-e218"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11907346/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143648688","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":"Effect of potassium nitrate on tooth sensitivity during in-office bleaching: A randomized clinical trial.","authors":"Deise Caren Somacal, Melissa Castro do Rio, Hélio Radke Bittencourt, Luiz Henrique Burnett Júnior, Ana Maria Spohr","doi":"10.4317/jced.61765","DOIUrl":"https://doi.org/10.4317/jced.61765","url":null,"abstract":"<p><strong>Background: </strong>The study is a triple-blind, split-mouth, randomized trial to evaluate and to compare the effect of different concentrations of potassium nitrate (PN) prior to in-office bleaching on tooth sensitivity (TS).</p><p><strong>Material and methods: </strong>Sixty participants were randomly divided into groups (n=30): Group A: 5% PN (positive control) and 10% PN; and Group B: 5% PN (positive control) and 35% PN. Each concentration of PN was applied to a hemi-arch for 10 min, and then a 35% bleaching agent was applied. The participants underwent two sessions of bleaching with a one-week interval. TS was recorded using a questionnaire and a visual analog scale.</p><p><strong>Results: </strong>According to McNemar's test, there was a significant reduction in the prevalence of TS in group A (<i>p</i>=0.013) and group B (<i>p</i>=0.000) across the time assessments. Fisher's Exact Test showed no significant difference between the control and treatment sides (<i>p</i>>0.05). There was a significant reduction in TS intensity for both groups (<i>p</i><0.05).</p><p><strong>Conclusions: </strong>The 10% and 35% PN were effective in reducing the prevalence and intensity of TS, as well as 5% PN, and the treatments did not affect color change. <b>Key words:</b>Clinical trial, dentin sensitivity, tooth bleaching, hydrogen peroxide, potassium nitrate.</p>","PeriodicalId":15376,"journal":{"name":"Journal of Clinical and Experimental Dentistry","volume":"17 2","pages":"e188-e194"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11907348/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143648833","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":"Impact of different gutta-percha removal techniques on dentinal integrity: An <i>in vitro</i> analysis.","authors":"Orlando Aguirre Guedes, Henrique Carneiro Ferreira, Danielly Moreira Abreu, Kássia Sousa de Lima, Esther Menezes Souza, Yasmin Gomes de Freitas, Daniel de Almeida Decurcio, Carlos Estrela","doi":"10.4317/jced.62524","DOIUrl":"https://doi.org/10.4317/jced.62524","url":null,"abstract":"<p><strong>Background: </strong>This study aimed to evaluate the impact of different gutta-percha removal (GPR) techniques on the occurrence of dentinal defects in bovine root canals.</p><p><strong>Material and methods: </strong>One hundred and eight bovine incisors were selected and stored in distilled water. The crowns were removed, leaving roots approximately 17 mm in length. Twelve roots were left unprepared and served as control (G1), and the remaining 96 roots were instrumented with BioRace files up to size 40/.04 (BR5) and filled with gutta-percha and Sealapex sealer using the lateral condensation technique. Twelve other roots were left filled and received no retreatment procedure (G2). The remaining 84 roots underwent filling material removal with R-Endo (G3), D-Race (G4), WaveOne Gold (G5), ProTaper Retreatment (G6), Mtwo R (G7), Reciproc (G8) instruments or with R1-Clearsonic ultrasonic insert (G9). After GPR, final apical enlargement was achieved using a BR7 (#60/.02) instrument. Roots were sectioned 3, 6 and 9 mm from the apex and observed under a stereomicroscope at 25ᵡ magnification. The presence/absence of root fractures, microcracks, and craze lines were recorded. Chi-square tests compared the incidence of dentinal defects between the groups, with a significance level set at <i>P</i><.05.</p><p><strong>Results: </strong>Defects occurred in 46.6% of the samples. No defects were observed in the unprepared canals (control, G1). Defects were detected in all other experimental groups (G2 to G9). Among retreatment techniques the R-Endo group (G3) presented significantly higher microcracks and craze lines (<i>P</i><.05). Defects were more frequent in the coronal and middle thirds.</p><p><strong>Conclusions: </strong>All GPR methods were linked to dentinal defects. The R-Endo system significantly increased microcracks and craze lines. <b>Key words:</b>Cracks, Dentinal defects, Gutta-percha removal, Retreatment, Vertical root fracture.</p>","PeriodicalId":15376,"journal":{"name":"Journal of Clinical and Experimental Dentistry","volume":"17 2","pages":"e195-e203"},"PeriodicalIF":0.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11907345/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143648850","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":"Influence of anterior open bite on oral health-related quality of life. A systematic review.","authors":"Jazmín Estephany Rodriguez-Huaringa, Gloria Ximena Jassmin Vargas-Mori, Luis Ernesto Arriola-Guillén","doi":"10.4317/jced.62398","DOIUrl":"10.4317/jced.62398","url":null,"abstract":"<p><strong>Background: </strong>Anterior open bite is a malocclusion caused by genetic and environmental causes that affect esthetics, occlusion, and speech, impacting the quality of life in children, adolescents, and adults. However, to date, no systematic review has analyzed the influence of anterior open bite (AOB) on oral health-related quality of life.</p><p><strong>Material and methods: </strong>This systematic review conducted a comprehensive search in the MEDLINE (via PubMed), EBSCO, SCOPUS, and LILACS databases until September 30, 2023. A total of 321 articles were identified across these databases. After applying the selection criteria, 13 articles were selected for full-text evaluation. Ultimately, only six studies, all cross-sectional, were included in the review. The Newcastle-Ottawa Scale was utilized to assess the risk of bias in these studies.</p><p><strong>Results: </strong>Six studies have found that AOB affects quality of life. In adults, it has a greater impact on women, especially on psychological and social well-being. In children, negative effects are observed in symptoms, function, and psychological aspects, with poor outcomes. One study found no significant differences in quality of life in children with AOB.</p><p><strong>Conclusions: </strong>The review indicates that AOB (anterior open bite) significantly impacts quality of life, particularly in psychological and functional areas such as speech, eating, and smiling. This information is essential for both orthodontists and patients. While most studies show moderate bias, further well-designed research is recommended. <b>Key words:</b>Open bite, oral health-related quality of life, review.</p>","PeriodicalId":15376,"journal":{"name":"Journal of Clinical and Experimental Dentistry","volume":"17 1","pages":"e87-e95"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11829720/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143433164","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":"Accuracy of apical limit control during retreatment provided by hybrid electronic foraminal locators: A micro-CT study.","authors":"Luciana Maria Arcanjo Frota, Raimundo Sales de Oliveira-Neto, Ana Grasiela Limoeiro, Murilo Priori Alcalde, Rodrigo Ricci Vivan, Marco Antônio Húngaro Duarte, Ricardo Affonso Bernardes, Bruno Carvalho Vasconcelos","doi":"10.4317/jced.62405","DOIUrl":"10.4317/jced.62405","url":null,"abstract":"<p><strong>Background: </strong>This study investigated the accuracy and reliability of apical limit control in endodontic retreatment using hybrid endodontic motors.</p><p><strong>Material and methods: </strong>Thirty-six mesial canals of mandibular molars were accessed, and their apical foramina (AF) were standardized to 200 µm. Chemical-mechanical preparation was performed with WaveOne Gold instruments (#20/.07), followed by obturation with gutta-percha and AH Plus cement. After initial preparation, the teeth were divided into three groups (n = 12): Root ZX II (RZX), VDW Gold (VDW) and Tri Auto ZX2 (TRZX), all in rotary kinematics and with AF as the limit (0.0). Exposure was performed in the crown-down direction with ProTaper retreatment instruments using 2.5% NaOCl as an irrigation solution. Before using the instruments, the apexes of the teeth were immersed in alginate. With the auto-stop function activated, the hybrid instruments were calibrated to stop rotating when the desired apical limit was reached. The last instrument was fixed in the canal and a micro-computed tomography scan was performed to determine the distance between the instrument tip and the AF. Data were analyzed using the Kruskal-Wallis and Dunn tests (<i>P</i><0.05).</p><p><strong>Results: </strong>No significant differences were found between the RZX (0.10 mm), Gold (0.13 mm) and TRZX (0.27 mm) devices; accuracy ranged from 91.70% (RZX and VDW) to 63.63% (TRZX). TRZX had the highest number of readings besides AF.</p><p><strong>Conclusions: </strong>It was concluded that all devices studied were efficient in maintaining the apical limit of instrumentation during endodontic retreatment when taken to the AF. <b>Key words:</b>Endodontics, Electronic odontometry, Endodontic retreatment.</p>","PeriodicalId":15376,"journal":{"name":"Journal of Clinical and Experimental Dentistry","volume":"17 1","pages":"e64-e69"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11829728/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143433237","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}