BDJ Open最新文献

{"title":"Reasons for tooth extraction in a Swedish county dental service: a 5-year longitudinal cohort study with focus on endodontic pathology.","authors":"Simon Persson, Fernando Mota De Almeida, Pontus Lundqvist, Anna Levinsson, Emine Camci, Thomas Kvist, Emma Wigsten","doi":"10.1038/s41405-026-00430-3","DOIUrl":"10.1038/s41405-026-00430-3","url":null,"abstract":"<p><strong>Aims: </strong>The aim of this study was to investigate tooth extractions in a Swedish public general dental practice setting, including the proportion of endodontically treated teeth, reasons for extraction, and subsequent prosthetic replacement.</p><p><strong>Materials and methods: </strong>A prospective cohort study was conducted in 20 clinics within the Public Dental Service of Västra Götaland, Sweden. During an 8-week period, general dental practitioners consecutively registered reasons for tooth extraction. Patients' pain levels were assessed. Pre-extraction radiographs were assessed for tooth status. Five-year follow-up data from electronic dental records were used to determine whether the extracted teeth had been prosthetically replaced and to classify the type of replacement. Descriptive and inferential statistics were used.</p><p><strong>Results: </strong>A total of 133 patients (61 men and 72 women; mean age 54.0 years, SD = ± 15.8) underwent extractions. Endodontic pathology (36.8%) and fractures (24.8%) were the most common reasons. Sixty-one patients had previous endodontic treatment, and one-third of extracted teeth were root-filled. Thirty-five teeth were prosthetically replaced, most often with removable prostheses (45.7%).</p><p><strong>Conclusions: </strong>Endodontically treated teeth, including those with initiated or completed root canal treatment, were markedly overrepresented among extractions, yet prosthetic replacement was infrequent. Younger patients less often opted for replacement, warranting further investigation of factors influencing replacement decisions.</p>","PeriodicalId":36997,"journal":{"name":"BDJ Open","volume":"12 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13110357/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147783671","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 relationship between parental mental health and early childhood caries: a meta-analysis and systematic review.","authors":"Lili Ma, Liying Jia, Kaixuan Han, Yanyan Zhang, Shu Fan, Hong Shi","doi":"10.1038/s41405-026-00429-w","DOIUrl":"10.1038/s41405-026-00429-w","url":null,"abstract":"<p><strong>Objectives: </strong>This study aimed to systematically evaluate the relationship between parental mental health and early childhood caries (ECC), providing scientific basis for researching the etiology and enabling clinical prediction and prevention of ECC.</p><p><strong>Materials and methods: </strong>A comprehensive search was conducted across five databases to identify relevant studies published up to October 2025. Eligible studies were those investigating the relationship between parental mental health and ECC. Data extraction and synthesis were performed following PRISMA guidelines using Stata 16.0. Robustness, heterogeneity, certainty of evidence, and publication bias were evaluated.</p><p><strong>Results: </strong>Out of 2889 studies, 12 were included in the meta-analysis. From 12 included studies, 3 explored parental depression, 7 explored parental dental anxiety, 4 explored parental stress, and 1 explored parental general anxiety disorder. The meta-analysis results showed that parental mental conditions increased the risk of ECC (ECC prevalence rate: OR = 1.54, 95%CI: 1.12-2.12) and (dmft: SMD = 0.19, 95%CI: 0.13-0.26), significantly.The subgroup results showed that parental dental anxiety and depression were both associated with ECC (OR = 1.59, 95% CI: 1.00-2.51; OR = 1.49, 95% CI: 1.09-2.04). There was no relationship between parental stress and ECC (OR = 2.19, 95%CI: 0.36-13.20). The meta-analysis results of adjustment ORs about parental stress were similar to the crude ORs (OR = 0.81, 95%CI: 0.58-1.14).</p><p><strong>Conclusions: </strong>The results indicated a strong association between parental mental conditions and ECC. Furthermore, higher levels of dental anxiety and depression in parents were associated with a higher prevalence of ECC in their children. However, the relationship between psychological stress and ECC was not observed. Results must be interpreted with caution due to the limitations of the evidence base.</p>","PeriodicalId":36997,"journal":{"name":"BDJ Open","volume":"12 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13103358/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147783727","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":"Brain parcellation for TMD neuroimaging: a critical narrative review.","authors":"Natalia Savychuk, Vasyl Pekhno, Anastasiia Liakhovska, Roman Sulik, Ivan Riabko","doi":"10.1038/s41405-026-00407-2","DOIUrl":"10.1038/s41405-026-00407-2","url":null,"abstract":"<p><strong>Purpose: </strong>To analyze modern brain mapping for neurobiological mechanisms of temporomandibular disorders, with particular emphasis on structural and functional alterations, employing advanced neuroimaging techniques such as fMRI and DTI. Furthermore, this study aims to identify the most appropriate combination of brain parcellation schemes that comprehensively cover cortical, subcortical, and brainstem structures to enhance the accuracy and standardization of neuroimaging protocols in TMD research.</p><p><strong>Methods: </strong>Scientific sources were searched in PubMed, Scopus, Web of Science and Google Scholar as of 29.06.2025, 689 records were identified for PRISMA workflow, of which 676 records remained for screening after the removing duplicates and irrelevant items, 630 records were excluded per prespecified criteria (inappropriate diagnoses, insufficiently described rapid studies, metabolic disorders), and 46 studies were included in the qualitative analysis.</p><p><strong>Results: </strong>We compare anatomical, functional, and multimodal atlases (Desikan-Killiany, Destrieux, Schaefer, HCP-MMP1.0, Brainnetome, SUIT, Brainstem atlases) in terms of fMRI/DTI compatibility and relevance of regions of interest.</p><p><strong>Conclusions: </strong>The authors suggest that the use of a combined parcellation scheme: HCP-MMP1.0 for the highly detailed cortex, SUIT for the cerebellum, specialized brainstem atlases-which cover corticocortical, cerebellar, and brainstem connections-increases mapping accuracy and meets modern requirements for the standardization of neuroimaging protocols in studies of the TMD.</p>","PeriodicalId":36997,"journal":{"name":"BDJ Open","volume":"12 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13099999/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147783654","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":"Interactive workshops on improving dental students' understanding of environmentally sustainable dentistry: a quality improvement project.","authors":"Florence Mai, Edward Parkinson, Fleur Mumford, Zahra Shehabi","doi":"10.1038/s41405-026-00427-y","DOIUrl":"10.1038/s41405-026-00427-y","url":null,"abstract":"<p><strong>Background: </strong>Environmental sustainability in dentistry (ESD) is increasingly recognised by major organisations as essential, yet teaching of it remains fragmented and inconsistent across UK dental schools. This project evaluates teaching designed to enhance students' confidence and knowledge of ESD.</p><p><strong>Methods: </strong>A two-part interactive workshop series was delivered to dental and dental hygiene and therapy students at Queen Mary University London. Workshop 1 combined didactic lectures with group-based brainstorming of sustainability challenges. Workshop 2 centred on student-led presentations proposing responses to challenges for stakeholders. Pre- and post-workshop surveys assessed confidence in four domains with a 10-point Likert scale, and knowledge with six multiple-choice questions.</p><p><strong>Results: </strong>Confidence scores increased across domains and knowledge scores improved following the intervention. Participants rated the workshops highly on usefulness and enjoyment. Feedback identified the need to improve workshop timing and reduce assignment workload.</p><p><strong>Discussion: </strong>Low baseline confidence and knowledge scores indicated a need to incorporate ESD into the curriculum. The mixed-method approach was associated with positive change, with one proposal progressing toward real-world implementation.</p><p><strong>Conclusion: </strong>Workshop-based teaching was associated with improved student confidence and knowledge in ESD. Early curriculum integration is recommended, aligning with the 2025 GDC Safe Practitioner Framework requirements for ESD education.</p>","PeriodicalId":36997,"journal":{"name":"BDJ Open","volume":"12 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13087112/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147700113","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":"Black is the new blue? A cross-sectional Gulf Cooperation Council (GCC) survey of colour preferences for scrubs, PPE and the dental clinical environment.","authors":"Abubaker Qutieshat, Reem T Al Amry, Zahra Mustafa, Mahmoud Rezk, Ghaid L Al Riyami, Majid Hamid-Oudjana, Laila Kebab, Ahmed Al Wahaibi, Rayhana Aouididi, Klara Avetisyan","doi":"10.1038/s41405-026-00426-z","DOIUrl":"10.1038/s41405-026-00426-z","url":null,"abstract":"<p><strong>Background: </strong>Colour cues in dental clinics may shape perceptions of professionalism, comfort, hygiene and anxiety, yet evidence from Gulf Cooperation Council (GCC) settings across attire, PPE and the operatory environment remains limited. This study examined colour preferences across Oman, the United Arab Emirates (UAE) and Bahrain.</p><p><strong>Methods: </strong>A cross-sectional, web-based survey was completed by non-healthcare university students in Oman (n = 193), UAE (n = 250) and Bahrain (n = 170) (total N = 613). Participants selected preferred colours for scrubs and multiple dental items (PPE, chairside disposables, dental chair and wall colour), indicated scrub colour by clinical scenario (routine, surgical, paediatric), endorsed 'comfortable' colours (select-all), and rated five attitudinal statements on a 5-point Likert scale. Between-country differences were examined using chi-square tests (Cramer's V) and Kruskal-Wallis tests; additional modelling included GEE for comfort endorsements and exploratory logistic regression for scenario switching.</p><p><strong>Results: </strong>Scrub preferences clustered around classic colours (blue/black), with modest between-country differences (χ² = 24.09, df = 10, p = 0.007; V = 0.14). Oman most preferred black (50.3%) then blue (41.5%); the UAE preferred blue (52.8%) then black (42.0%); Bahrain preferred blue (47.1%) then black (37.1%). Scenario framing increased openness to non-classic colours in paediatric care (red and yellow), and only 16.6% retained the same scrub colour across all scenarios. For other items, classic/neutral tones predominated, with significant country differences for most categories (including masks, wall colour, dental chair, dental bib, disposable kit and suction tips), while glove colour distributions were broadly similar. Warm/yellow operatory lighting was preferred over white lighting overall (60.2%) with negligible between-country differences (p = 0.881). Comfort endorsements were highest for blue and white; patterned prints showed the clearest country separation (UAE 50.4% vs Oman 36.8% and Bahrain 35.9%), persisting in adjusted GEE models. Most respondents disagreed that darker colours appear less hygienic, although distributions differed modestly across countries (Kruskal-Wallis p = 0.010).</p><p><strong>Conclusions: </strong>Colour preferences in GCC dental settings are anchored in a stable 'classic' palette, while scenario and item context introduce actionable departures, particularly for paediatric care. Black competed directly with blue across several domains and was not generally viewed as less hygienic, supporting its inclusion within a 'safe' procurement palette. Preference for warm lighting suggests a practical environmental lever to enhance perceived comfort.</p>","PeriodicalId":36997,"journal":{"name":"BDJ Open","volume":"12 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13076641/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147677361","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":"Cross-cultural adaptation and validation of the Arabic version of the Malocclusion Impact Scale for Early Childhood (MIS-EC/Ar).","authors":"Ahmed Kamal El-Motayam, Rim Fathalla, Marwah Salah Abdel-Latif, Iman Ali El-Baraky, Lamia Khairy Gadallah","doi":"10.1038/s41405-026-00411-6","DOIUrl":"10.1038/s41405-026-00411-6","url":null,"abstract":"<p><strong>Background: </strong>Malocclusion is a highly prevalent oral disease in children. It could detrimentally affect their oral health-related quality of life (OHR-QoL). The Malocclusion Impact Scale for Early Childhood (MIS-EC) is a newly developed scale for the assessment of OHR-QoL in this population aged 3-5 years-old. The aim of this study is to translate and validate an Arabic version of the MIS-EC scale (MIS-EC/Ar).</p><p><strong>Materials and methods: </strong>Translation and cross-cultural adaptation of the MIS-EC/Ar scale were performed conforming to relevant WHO guidelines. A sample of mothers/caregivers of children aged between 3 and 6 years was recruited (n = 236). Clinical examination of children and assessment of malocclusion were performed before taking MIS-EC/Ar. The internal consistency was assessed using Cronbach's alpha. Test-retest reliability performed after two weeks (n = 30) employed intraclass correlation coefficient (ICC). Construct validity, including convergent, discriminant, and structural validity, was evaluated in addition to criterion validity.</p><p><strong>Results: </strong>MIS-EC/Ar showed good internal consistency (standardized Cronbach's alpha = 0.797) and excellent test-retest reliability (ICC = 0.929, 95% CI 0.884-0.962). Convergent validity, Spearman correlation coefficients for the MIS-EC/Ar total score with the overall oral health question, was limited (r = 0.159, P < 0.05). Discriminant validity was significant (p < 0.05). Criterion validity was fair (r = 0.298, p = 0.01). Exploratory factor analysis suggested a reduced scale of six items.</p><p><strong>Conclusions: </strong>The MIS-EC/Ar is a reliable instrument with good discriminant validity for assessing malocclusion impact on preschool children's OHR-QoL. Limited convergent validity and altered factor structure suggest cultural adaptation effects.</p>","PeriodicalId":36997,"journal":{"name":"BDJ Open","volume":"12 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13077054/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147677425","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":"Clinical performance of low-shrinkage giomer compared to nanohybrid resin composite in proximal restorations after one year: a randomized clinical trial.","authors":"Marwa I AbdelHafez, Omar Shaalan, Heba Hamza","doi":"10.1038/s41405-026-00423-2","DOIUrl":"10.1038/s41405-026-00423-2","url":null,"abstract":"<p><strong>Objectives: </strong>The present study assesses the clinical performance and occlusal wear of low-shrinkage giomer and nanohybrid composite in proximal restorations.</p><p><strong>Methods: </strong>Fifty participants with proximal caries in posterior teeth (n = 25) were recruited. Teeth were restored with either conventional nano-hybrid composite (Filtek Z250XT, 3M ESPE, USA) or low-shrinkage giomer (Beautifil II LS, Shofu Inc, Japan). Clinical performance was assessed using revised FDI criteria at baseline, 6 and 12 months. Wear was assessed after 12 months by using 3D inspection and metrology software (Geomagic Control X; 3D Systems, USA). FDI scores were analyzed using Chi‑square test for intergroup comparisons and Cochran's Q‑test for intragroup comparisons. Wear data were analyzed using independent t test for intergroup comparison and paired t test for intragroup comparisons.</p><p><strong>Results: </strong>At the 12-month follow-up, both Beautifil II LS and Filtek Z250XT exhibited high clinical success rates, with 100% and 96% success rates, respectively. Beautifil II LS restorations had a 4% lower risk of failure compared to Filtek Z250XT (ARR = 4.0 (95% CI -12.6 to 19.5, P > 0.05)). The mean wear after 12 months was 0.036 ± 0.01 mm for Beautifil II LS and 0.038 ± 0.01 mm for Filtek Z250XT. The difference between groups was minimal (0.0026 mm; 95% CI: -0.0271 to 0.0324) and not statistically significant (P = 0.8178).</p><p><strong>Conclusion: </strong>Low-shrinkage giomer showed satisfactory clinical performance and wear resistance compared to nanohybrid resin composite after one year. Both materials are considered clinically acceptable as per the American Dental Association (ADA) standards.</p>","PeriodicalId":36997,"journal":{"name":"BDJ Open","volume":"12 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13076630/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147677409","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 enamel surface treatment via Er, Cr: YSGG laser and nano-hydroxyapatite toothpaste on mineral content of primary teeth via x-ray diffractometer: an in-vitro study.","authors":"Fatma Mohamed Elhussini, Dina Hamdy, Ahmed Hammad Abodouh, Gehan Gaber Allam","doi":"10.1038/s41405-026-00418-z","DOIUrl":"10.1038/s41405-026-00418-z","url":null,"abstract":"<p><strong>Purpose: </strong>This study evaluated the effect of Er,Cr:YSGG laser treatment, with or without nano-hydroxyapatite (nHAP) toothpaste, on the mineral content of primary enamel specimens, with emphasis on their remineralization potential in pediatric dentistry.</p><p><strong>Materials and methods: </strong>This in vitro study included 33 sound primary anterior teeth, from which enamel slabs were prepared and subjected to demineralization for 96 hours. Specimens were randomly assigned to three groups (n = 11): Group A (nHAP toothpaste), Group B (Er,Cr:YSGG laser, 2780 nm), and Group C (combined laser and nHAP toothpaste). Mineral phase composition was assessed using X-ray diffraction (XRD).</p><p><strong>Results: </strong>Quantitative phase analysis revealed an increase in apatite crystal content in all groups following treatment. Group C showed the highest increase (7.4%) and exhibited a complete transformation into apatite structures. Groups A and B demonstrated comparable increases (5.1% and 4.8%, respectively), with no statistically significant difference between them.</p><p><strong>Conclusions: </strong>Both Er,Cr:YSGG laser irradiation and nHAP toothpaste enhanced apatite formation in demineralized primary enamel; however, their combined application produced the most pronounced remineralization effect.</p>","PeriodicalId":36997,"journal":{"name":"BDJ Open","volume":"12 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13070032/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147663465","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":"Knowledge, attitude, and practice in diagnostic dental radiology: an Egyptian survey with a global perspective.","authors":"Mohamed F Rashed, Lamia Khairy Gadallah, Mohamed Abdelfattah Galal, Khaled Helmi El-Wakeel, Hend S ElSayed","doi":"10.1038/s41405-026-00415-2","DOIUrl":"10.1038/s41405-026-00415-2","url":null,"abstract":"<p><strong>Objectives: </strong>Many surveys report less than optimum knowledge, attitude, and practice (KAP) of dental imaging for patient and operator safety. This study aimed to assess the KAP for diagnostic imaging among dentists in light of global practices and recent recommendations.</p><p><strong>Methods: </strong>A cross-sectional survey was conducted using a structured questionnaire that was electronically distributed through dental social media platforms between March 1st and June 30th, 2022. Forty-seven questions evaluating demographics, knowledge, practice, and attitude were included. The survey targeted Egyptian dentists practicing in Egypt.</p><p><strong>Results: </strong>Two hundred and twenty-eight dentists of different specialties responded. Fifty-nine percent of the dentists were not familiar with the ALARA principle. Fifty-three percent never use lead aprons. Dentists (16.6%) who practiced in facilities with cone-beam computerized tomography (CBCTs) showed significantly (p = 0.000) higher knowledge scores (7.89 ± 2.63) than those who didn't have CBCTs (6.16 ± 2.67). There was no statistical difference in training received (p = 0.345) between the different specialties. Most dentists (79.4%) were interested in increasing their knowledge of radiation safety.</p><p><strong>Conclusions: </strong>Within the limitations of this study, there is a need to educate dentists on radiation hazards, child-sized imaging protocols, and how to implement the ALARA principle. Training materials freely available on reliable websites should be disseminated. Regulations should include auditing referrals and periodic calibration of X-ray units.</p>","PeriodicalId":36997,"journal":{"name":"BDJ Open","volume":"12 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13070033/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147663459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effect of clip material on the retention of implant retained mandibular overdenture: randomized clinical study.","authors":"Sara Medhat Mohamed, Ahmed M Sayed","doi":"10.1038/s41405-026-00419-y","DOIUrl":"10.1038/s41405-026-00419-y","url":null,"abstract":"<p><strong>Aim: </strong>To evaluate the retention of implant retained mandibular overdenture with polyether-ether-ketone (PEEK) bar using either ready-made nylon clips or custom-made PEEK clips over a one-year randomized clinical study.</p><p><strong>Materials and methods: </strong>Twenty completely edentulous patients received two implants inserted bilaterally in the canine-premolar region. A milled PEEK bar was screwed to the multiunit abutment screwed to the implants. Patients were divided equally into two groups (n = 10) according to clip material; group1: ready-made nylon clip and group 2; PEEK clip (Pressed BioHPP®). Clips were picked up into the fitting surface of the overdenture. Retention force was measured at insertion, three months, six months and one year using universal testing machine. Data were analysed using two-way repeated measure ANOVA followed by Bonferroni post-hoc tests (p ≤ 0.5).</p><p><strong>Results: </strong>Retention values between nylon clip group and PEEK group revealed non-statistically significant difference at insertion (28.98 N ± 3.40 and 28.38 N ± 4.80 respectively), three months (30.93 N ± 3.52 and 30.43 N ± 4.7 respectively), six months (30.63 N ± 3.50 and 30.48 N ± 4.63 respectively) and one year (27.13 N ± 3.38 and 27.69 N ± 4.41 respectively).</p><p><strong>Conclusion: </strong>PEEK clips used for retention of PEEK bar-implant retained mandibular overdentures showed comparable retention values to nylon clips up to one year.</p>","PeriodicalId":36997,"journal":{"name":"BDJ Open","volume":"12 1","pages":""},"PeriodicalIF":3.1,"publicationDate":"2026-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13062048/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147640038","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}