Journal of Clinical and Experimental Dentistry最新文献

{"title":"The effect of thickness and sintering mode on the impact strength of a graded Zirconia.","authors":"Beatriz Serralheiro da Cruz, Amanda M de Oliveira Dal Piva, João Paulo Mendes Tribst, Isabella Marian Lena, Arie Werner, Renata Marques de Melo, Cornelis Johannes Kleverlaan","doi":"10.4317/jced.64108","DOIUrl":"10.4317/jced.64108","url":null,"abstract":"<p><strong>Background: </strong>Graded zirconia ceramics balance the high strength of 3Y-TZP with the translucency of 5Y-PSZ through their layered microstructure. However, the mechanical behavior of distinct compositional zones, particularly the transition zone, remains insufficiently characterized under dynamic loading conditions. This study aimed to evaluate the influence of different sintering protocols and thicknesses on the impact strength of graded zirconia.</p><p><strong>Material and methods: </strong>Specimens were sectioned by layer (3Y-TZP, transition zone, 5Y-PSZ) under two thicknesses (1.0 and 1.5 mm) and two sintering protocols (conventional and speed). Impact strength testing, finite element analysis, and fractographic analysis were performed. A total of 180 bars were tested using the Dynstat method, with results analyzed via three-way ANOVA ( = 0.05).</p><p><strong>Results: </strong>The 3Y-TZP layer exhibited the highest impact strength (46.8-66.7 kJ/m²), followed by the transition zone (23.7-41.9 kJ/m²) and 5Y-PSZ (15.5-28.7 kJ/m²). A significant three-way interaction (F2,168 = 5.080, p = 0.007) was observed, with thicker 5Y-PSZ specimens showing ~45% less resistance under speed sintering. Fractographic analysis revealed intergranular fracture without delamination, confirming structural integrity.</p><p><strong>Conclusions: </strong>The 3Y-TZP layer provides superior impact resistance regardless of processing conditions, while conventional sintering is preferable for thicker 5Y-PSZ layers. These findings inform material selection and manufacturing processes for graded zirconia restorations in high-stress applications.</p>","PeriodicalId":15376,"journal":{"name":"Journal of Clinical and Experimental Dentistry","volume":"18 5","pages":"e671-e680"},"PeriodicalIF":0.0,"publicationDate":"2026-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13354039/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148421266","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 Fixed Functional Appliances in Class II Malocclusion: A Clinical Performance Comparison.","authors":"Remmiya Mary Varghese, Aravind Kumar Subramanian, Joji Alex","doi":"10.4317/jced.63954","DOIUrl":"10.4317/jced.63954","url":null,"abstract":"<p><strong>Background: </strong>Class II malocclusion, which impact 20-25% of the population worldwide, stem from either inadequate development of the mandible or excessive development of the maxilla. Typically seen among young individuals, initiating treatment early can modify growth patterns and enhance results. Treatment Options include growth modification, dental camouflage, and surgery. Fixed functional appliances aid in better treatment outcome without relying on patient compliance. The aim of current study is to evaluate the efficiency of Forsus Fatigue Resistant Device, Powerscope, and Twin Force Bite Corrector in treating class II malocclusion.</p><p><strong>Material and methods: </strong>A prospective study at Saveetha Dental College (Jan 2022-Jan 2023) examined 60 patients (ages 14-16) with skeletal class II malocclusion. Divided into three groups, participants received treatment with Forsus Fatigue Resistant Device, Powerscope, or Twin Force Bite Corrector. Outcomes were assessed via lateral cephalograms before and after (6-9 months) treatment.A prospective study conducted at Saveetha Dental College (Jan 2022-Jan 2023) examined 60 patients (ages 14-16) with skeletal class II malocclusion. Participants were divided into three groups and treated with either the Twin Force Bite Corrector, Powerscope, or the Forsus Fatigue Resistant Device. Lateral cephalograms were used to evaluate the outcome both before and after the treatment (6-9 months).</p><p><strong>Results: </strong>Skeletal parameter changes such as SNB, ANB, Go-Gn, Jaraback ratio, and IMPA, were significant across groups (p&lt;0.05), with TFBC showing the most efficacy in ANB (-4.69mm) change. Linear parameters like LAFH and PFH also showed significant changes, particularly in groups I and III. In dental parameters, significant changes were observed in angular measures like L1-SN, L1-NB, and interincisal angles, and linear measures such as L1-NB linear and L6-NB linear.</p><p><strong>Conclusions: </strong>Comparing the favourable outcome of the parameters TFBC is effective among the other treatment but the change in SNA and maxillary length implies a continuous and consistent follow-up and evaluation is required clinically for a favourable outcome.</p>","PeriodicalId":15376,"journal":{"name":"Journal of Clinical and Experimental Dentistry","volume":"18 5","pages":"e636-e646"},"PeriodicalIF":0.0,"publicationDate":"2026-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13354054/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148421281","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":"Use of epinephrine combined with dental anesthetics in hypertensive patients during dental treatment.","authors":"Alan Garcia Essado, Daniele Morais Dias, Gabriella Tosta Silva, Luciano de Souza Gonçalves, Vinícius Rangel Geraldo Martins, Rodrigo Galo, Marcelo Rodrigues Pinto","doi":"10.4317/jced.63825","DOIUrl":"10.4317/jced.63825","url":null,"abstract":"<p><strong>Background: </strong>The use of local anesthetics containing epinephrine is routine in dental practice, although concerns persist regarding their safety in patients with cardiovascular disease.</p><p><strong>Material and methods: </strong>This prospective study was designed to evaluate the effects of 2 percent mepivacaine with 1:100,000 epinephrine on hemodynamic stability in individuals with con-trolled hypertension. Sixty-five individuals aged 20 to 60 years were monitored using automated blood pressure and pulse oximetry devices before anesthesia (t0'), five minutes following injection (t5), and thirty minutes after administration (t30). Systolic and diastolic blood pressure, heart rate, and oxygen saturation were assessed.</p><p><strong>Results: </strong>No significant alterations were detected at any time point in either hypertensive or normotensive subjects.</p><p><strong>Conclusions: </strong>Epinephrine at a 1:100,000 concentration combined with 2 percent mepivacaine does not compromise short-term hemodynamic stability in patients with controlled hypertension undergoing routine dental extractions.</p>","PeriodicalId":15376,"journal":{"name":"Journal of Clinical and Experimental Dentistry","volume":"18 5","pages":"e600-e604"},"PeriodicalIF":0.0,"publicationDate":"2026-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13354043/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148421350","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 spacer and milling strategy on CAD/CAM ceramic crown fit and load-bearing capacity.","authors":"Ricardo-Susin Schelbauer, Ana-Laura Rosa, Gabriela-de-Souza Balbinot, Fabricio-Mezzomo Collares, Marina-da-Rosa Kaizer, Carla-Castiglia Gonzaga","doi":"10.4317/jced.63812","DOIUrl":"10.4317/jced.63812","url":null,"abstract":"<p><strong>Background: </strong>This study assessed the influence of virtual spacer (70, 110, 150 m) and milling strategy (Standard vs. Veneer) on marginal and internal fit, and load-bearing capacity of CAD/CAM ceramic crowns.</p><p><strong>Material and methods: </strong>Sixty composite resin abutments were scanned, and feldspathic ceramic crowns (CEREC Blocs) were fabricated. Micro-computed tomography evaluated marginal and internal fit on sagittal and axial planes. Crowns were bonded before monotonic load-bearing capacity testing. Data were analyzed using two-way ANOVA and Tukey's test (=5%).</p><p><strong>Results: </strong>Marginal fit showed no significant differences among milling strategies or spacer settings, and values for all groups were within the clinically accepted range (~100 to 150 m). The virtual spacer, but not the milling strategy, significantly influenced the internal fit at specific sites on both sagittal and axial planes. The 150 m spacer produced larger internal gaps compared to the 70 m setting at the affected sites. Load-bearing capacity (ranging from 924 N to 1297 N) showed no significant differences among any conditions tested.</p><p><strong>Conclusions: </strong>The virtual spacer thickness influenced the internal fit of ceramic crowns at specific measurement sites, while the milling strategy did not. Neither factor significantly affected the immediate load-bearing capacity under monotonic loading. Marginal fit remained clinically acceptable across all conditions.</p>","PeriodicalId":15376,"journal":{"name":"Journal of Clinical and Experimental Dentistry","volume":"18 5","pages":"e590-e599"},"PeriodicalIF":0.0,"publicationDate":"2026-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13354042/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148421108","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":"CBCT Evaluation of the Relationship Between Mandibular Molars and the Inferior Alveolar Canal in a Peruvian Population.","authors":"Yuriani Del Carmen Rebaza-Magán, Marco Antonio Reátegui-Navarro, Cesar Augusto Jiménez-Prado, Manuel Fernando Guillén-Galarza, Hector Martin Vargas-Cornejo","doi":"10.4317/jced.64037","DOIUrl":"10.4317/jced.64037","url":null,"abstract":"<p><strong>Background: </strong>Proximity between the inferior alveolar canal and mandibular molar apices is a critical factor in oral surgery and implant dentistry, as it may increase the risk of nerve injury. Cone-beam computed tomography (CBCT) enables precise three-dimensional evaluation of this relationship; however, evidence in Peruvian populations remains limited.</p><p><strong>Material and methods: </strong>A descriptive cross-sectional study was conducted using 177 CBCT scans obtained from the IRM Radiological Center in Trujillo, Peru (2024-2025). The distance between the inferior alveolar canal and the apices of mandibular first and second molars was measured at the mesial and distal roots. Descriptive statistics were calculated, and differences according to age and sex were assessed using Student's t-test and the Kruskal-Wallis test (p &lt; 0.05).</p><p><strong>Results: </strong>First mandibular molars showed greater distances from the canal, with mean values of 5.1 mm in mesial roots and 4.3-4.4 mm in distal roots. Second molars presented shorter distances, particularly in distal roots (2.5-2.6 mm). No significant differences were observed among age groups (p &gt; 0.05). Male patients showed greater distances than females, with significant differences in mesial roots (p &lt; 0.05).</p><p><strong>Conclusions: </strong>Second mandibular molars are located closer to the inferior alveolar canal than first molars. CBCT provides clinically relevant information for surgical planning and may help reduce the risk of inferior alveolar nerve injury.</p>","PeriodicalId":15376,"journal":{"name":"Journal of Clinical and Experimental Dentistry","volume":"18 5","pages":"e655-e661"},"PeriodicalIF":0.0,"publicationDate":"2026-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13354053/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148421111","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":"Hydrogen Peroxide Diffusion and Optical Response in a Universal Composite Resin: A Spectrophotometric In Vitro Investigation with Clinical Implications.","authors":"Francesca Zotti, Enrique-Antonio Espinoza, Giorgia Lanzaretti, Marius Bud","doi":"10.4317/jced.63941","DOIUrl":"10.4317/jced.63941","url":null,"abstract":"<p><strong>Background: </strong>The aim of this in vitro study was to evaluate the extent to which a hydrogen peroxide-based whitening agent penetrates a universal composite resin and induces optical changes detectable by spectrophotometry.</p><p><strong>Material and methods: </strong>60 rectangular-shaped composite specimens were fabricated and finished using a standardized protocol, then divided into two groups based on the polishing method used: 30 specimens were polished with a single-step polishing system (Enhance), and the remaining specimens were polished with a two-step polishing system(Astropol). Each group was further divided into two subgroups based on the ageing solution in which they were submerged after polishing: red wine (study groups) or physiological solution (control groups). Specimens then underwent ageing and were exposed to a 40% peroxide gel at predefined intervals. Color measurements (L*, a*, b*) were recorded before and after treatment and overall color difference (Eab*) was computed according to the CIE L*a*b* formula. Statistical analysis was performed using software and applying Wilcoxon's W test and Welch's t test.</p><p><strong>Results: </strong>In both study groups, a statistically significant difference in Eab* values was found between the measurement points after bleaching (p &lt; 0.05). Between-group comparisons showed statistically significant differences in lateral Eab* after bleaching (p &lt; 0.05). All measurement points achieved final Eab* values 3.3 following whitening treatment.</p><p><strong>Conclusions: </strong>Within the limitations of this study, hydrogen peroxide-based systems appear capable of diffusing into universal composite resins and altering their optical properties. Furthermore, the bleaching effect appears to be greater in specimens polished using a single-step method.</p>","PeriodicalId":15376,"journal":{"name":"Journal of Clinical and Experimental Dentistry","volume":"18 5","pages":"e628-e635"},"PeriodicalIF":0.0,"publicationDate":"2026-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13354037/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148421194","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":"Prosthetic and Biological Complications of Metal-Zirconia versus Metal-Acrylic Implant-Supported Screw-Retained Complete-Arch Prostheses: A Systematic Review and Meta-Analysis.","authors":"Dusan Marinkovic, Rodrigo Gutiérrez, Marcos Frey, Francisca Collao, Yasna Moreno, Claudio Miranda","doi":"10.4317/jced.63882","DOIUrl":"10.4317/jced.63882","url":null,"abstract":"<p><strong>Background: </strong>Full-arch implant-supported screw-retained prostheses are widely used for the rehabilitation of edentulous patients. Conventional metal-acrylic hybrid prostheses have demonstrated acceptable clinical outcomes, however, mechanical complications, prosthetic wear, and biological issues remain concerns. Monolithic zirconia prostheses with a metallic substructure have been proposed as an alternative, potentially improving long-term clinical performance.</p><p><strong>Material and methods: </strong>A systematic review and meta-analysis were conducted following predefined eligibility criteria. A comprehensive search of CENTRAL, PubMed, Embase, and Epistemonikos databases was performed for studies published between 2000 and 2025. Non-randomized clinical studies with a minimum follow-up of 1 year comparing full-arch implant-supported screw-retained metal-zirconia prostheses with metal-acrylic prostheses were included. Fully monolithic zirconia restorations, partial fixed prostheses, and non-full-arch rehabilitations were excluded. Risk of bias was assessed using the ROBINS-I tool, and the certainty of evidence was evaluated according to the GRADE approach. Quantitative synthesis was conducted when appropriate.</p><p><strong>Results: </strong>Twelve studies fulfilled the inclusion criteria, with eleven included in the meta-analysis. Metal-zirconia prostheses showed significantly lower prosthetic wear (RR=0.29; 95% CI, 0.14-0.59) and a reduced risk of peri-implantitis (RR=0.67; 95% CI, 0.47-0.96). Marginal bone loss favored metal-zirconia prostheses (SMD=0.36). Trends toward improved prosthesis survival (RR = 1.05) and reduced prosthesis loss (RR = 0.09) were observed. No significant differences were found regarding implant survival, framework fractures, esthetics, or speech. Most studies exhibited moderate to critical risk of bias, mainly due to confounding factors.</p><p><strong>Conclusions: </strong>Within the limitations of predominantly non-randomized evidence, metal-zirconia implant-supported screw-retained complete-arch prostheses demonstrate a more favorable clinical profile than metal-acrylic prostheses, particularly in terms of prosthetic wear, peri-implantitis, and marginal bone loss. Although overall survival rates were comparable, trends toward improved prosthesis longevity were observed. Well-designed randomized clinical trials with long-term follow-up are required to confirm these findings.</p>","PeriodicalId":15376,"journal":{"name":"Journal of Clinical and Experimental Dentistry","volume":"18 5","pages":"e704-e715"},"PeriodicalIF":0.0,"publicationDate":"2026-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13354045/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148421232","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":"Fatigue Survival and Biomechanical Behavior of Two-piece Titanium and Zirconia Dental Implants.","authors":"Jefferson David Melo de Matos, Guilherme da Rocha Scalzer Lopes, Nathália de Carvalho Ramos, Mário Alexandre Coelho Sinhoreti, Alexandre Luiz Souto Borges, Daher Antonio Queiroz, Marco Antonio Bottino","doi":"10.4317/jced.64022","DOIUrl":"10.4317/jced.64022","url":null,"abstract":"<p><strong>Background: </strong>Titanium implants are considered the gold standard for oral rehabilitation; however, zirconia implants have emerged as a metal-free alternative with promising esthetic and biological properties. Despite these advantages, limited evidence is available regarding their long-term fatigue behavior and fracture resistance.</p><p><strong>Material and methods: </strong>In this in vitro experimental study conducted at São Paulo State University (UNESP), Brazil, forty implants were divided into two groups (n = 20): zirconia implants (ZZ) and titanium implants (TZ) (4.1 × 10 mm). Implants were embedded in polyurethane blocks according to ISO 14801:2016 specifications. Monolithic zirconia crowns were fabricated using CAD/CAM technology and cemented onto zirconia abutments. All assemblies underwent thermomechanical aging (2×106 cycles, 200 N, 2 Hz). Fatigue resistance was assessed using a stepwise loading protocol. Crown-abutment misfit was measured microscopically, and torque loss after fatigue was recorded. Statistical analysis was performed using Mann-Whitney U tests and Kaplan-Meier survival analysis ( = 0.05).</p><p><strong>Results: </strong>Zirconia implants showed significantly greater fracture resistance (1123.73 ± 153.61 N) than titanium implants (818.67 ± 42.41 N) (p = 0.037). No significant difference in fatigue survival was observed between groups (p = 0.097). The zirconia group presented greater crown-abutment misfit (39.63 ± 10.1 m) than the titanium group (25.09 ± 4.6 m) (p &lt; 0.001). Catastrophic implant body fractures were more frequent in the zirconia group, whereas titanium implants exhibited more repairable failure modes.</p><p><strong>Conclusions: </strong>Zirconia implants demonstrated similar fracture resistance but showed catastrophic implant fractures, whereas titanium implants presented repairable failure patterns.</p>","PeriodicalId":15376,"journal":{"name":"Journal of Clinical and Experimental Dentistry","volume":"18 5","pages":"e647-e654"},"PeriodicalIF":0.0,"publicationDate":"2026-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13354055/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148421176","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 Total Crown and Veneer Zirconia Meso-Structure Designs on Anterior Implant-Supported Restorations: A 3D Finite Element Analysis.","authors":"Guilherme Schmitt de Andrade, Luis Alberto Formighieri, Gabriela Carrão Aragonez, Marina Gullo Augusto, João Paulo Mendes Tribst","doi":"10.4317/jced.63753","DOIUrl":"10.4317/jced.63753","url":null,"abstract":"<p><strong>Background: </strong>Unfavorable implant positioning in esthetic zones may result in buccal or incisal emergence of the prosthetic screw access, requiring alternative restorative strategies. This study evaluated, by three-dimensional finite element analysis (FEA), the effect of total crown and laminated veneer zirconia meso-structure designs cemented onto a titanium base (Ti-base) on stress distribution and bone microstrain.</p><p><strong>Material and methods: </strong>Two zirconia meso-structure designs: total crown (TC) and laminated veneer (LV) were simulated on a Ti-base using previously validated models. A 20 Ncm screw torque and a 150 N oblique load at 30° were applied. Stress was analyzed using von Mises and maximum principal stress, and bone response by microstrain.</p><p><strong>Results: </strong>Both designs showed similar stress distribution in the implant, Ti-base, and screw. Microstrain concentrated mainly in the peri-implant cortical bone, with slightly wider distribution in the LV model.</p><p><strong>Conclusions: </strong>TC and LV meso-structures exhibited comparable biomechanical behavior, suggesting that their selection may be guided primarily by restorative and esthetic considerations.</p>","PeriodicalId":15376,"journal":{"name":"Journal of Clinical and Experimental Dentistry","volume":"18 4","pages":"e449-e456"},"PeriodicalIF":0.0,"publicationDate":"2026-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13170935/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147941822","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":"Vertebral Cervical Fusion in Individuals with and without Open Bite: A Comparative Matched Study.","authors":"Lucecita Angeles-Estrella, Jhoana Mercedes Llaguno-Rubio, Gustavo Adolf Fiori-Chincaro, Luis Ernesto Arriola-Guillén","doi":"10.4317/jced.63888","DOIUrl":"10.4317/jced.63888","url":null,"abstract":"<p><strong>Background: </strong>This study aims to evaluate the presence of cervical vertebral fusion in individuals with an open bite compared to those without, matched by skeletal relationship, age, and sex.</p><p><strong>Material and methods: </strong>This matched-comparative study analyzed 234 lateral head radiographs, dividing the subjects into two groups. The open-bite group consisted of 117 patients (69 women and 48 men; average age 24.05 ± 12.5 years), while the control group included an equal number of individuals with a similar gender ratio (average age 23.79 ± 11.95 years). Both groups were matched based on their skeletal relationship, specifically the ANB angle. A trained and calibrated radiologist conducted a visual assessment of the cervical spine using lateral cephalometric radiographs for each subject. The study evaluated the presence of simple fusion and block fusion. Statistical analyses were performed using the Chi-square test and binary logistic regression (p &lt; 0.05).</p><p><strong>Results: </strong>The incidence of simple fusion was higher in the control group (35%) compared to the open-bite group (26.5%). A small number of cases (2.6%) of block fusion were found only in the anterior open-bite group. However, these differences did not reach statistical significance (p = 0.096). Additionally, no significant influences were identified regarding sex, age, group, or ANB angle (p &gt; 0.05).</p><p><strong>Conclusions: </strong>There were no differences in the overall prevalence of cervical fusions between individuals with anterior open bite and those without. However, the finding that block fusions occurred exclusively in the open-bite group underscores the importance of evaluating the cervical spine, as it may affect the individual's head position.</p>","PeriodicalId":15376,"journal":{"name":"Journal of Clinical and Experimental Dentistry","volume":"18 4","pages":"e469-e475"},"PeriodicalIF":0.0,"publicationDate":"2026-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13170937/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147941351","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}