Clinical Oral Implants Research最新文献

{"title":"The Effect of Crown Height and Retentive Height of Abutment on the Fracture Resistance of Fatigued Monolithic Zirconia Anterior Implant Crowns—An In Vitro Study","authors":"Esha Zahid,&nbsp;Jaafar Abduo,&nbsp;Attila Gergely,&nbsp;Roy Judge,&nbsp;Carolina Perez-Rodriguez,&nbsp;Joseph Palamara","doi":"10.1111/clr.70130","DOIUrl":"10.1111/clr.70130","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objectives</h3>\u0000 \u0000 <p>This laboratory study investigated the effect of two different retentive heights of Ti-base abutments (3.5 and 5.5 mm) and crown heights (13 and 16 mm) on the load at failure and survival of monolithic zirconia implant-supported crowns replacing a maxillary central incisor.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Materials and Method</h3>\u0000 \u0000 <p>Forty implant-supported crowns were divided into four groups (<i>n</i> = 10 each): short crown/long abutment (SCLA), short crown/short abutment (SCSA), long crown/long abutment (LCLA), and long crown/short abutment (LCSA). Specimens underwent thermal cycling and incremental mechanical cyclic loading starting at 450 N increasing by 50 N until failure. Load and cycles at failure, Weibull analysis, mode of failure, and fractographic assessments were performed.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Mean load at failure was highest for the SCSA group (536.9 N ± 78.4 N), then SCLA (493.4 ± 53.2 N) and LCLA (491.3 ± 40.7 N), and lowest for the LCSA group (453.7 N ± 2.8 N). The differences were statistically significant (<i>p</i> = 0.035). Cycles at failure showed significant differences among groups (<i>p</i> &lt; 0.001), with SCSA demonstrating the greatest cycles at failure (72,492 ± 44,551 cycles), then SCLA (43,630 ± 27,579 cycles) and LCLA (37,706 ± 18,826 cycles), and LCSA the lowest (8399 ± 7308 cycles). Short crowns showed abutment/screw fractures, while longer crowns had more crown fractures.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>Crown height significantly influenced load at failure and survival, with shorter crowns performing better. The retentive height of the Ti-base abutment had less impact; however, shorter abutments provided better mechanical performance when paired with shorter crowns, suggesting careful consideration for anterior restorations.</p>\u0000 </section>\u0000 </div>","PeriodicalId":10455,"journal":{"name":"Clinical Oral Implants Research","volume":"37 7","pages":"867-882"},"PeriodicalIF":5.9,"publicationDate":"2026-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/clr.70130","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147719536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development and Validation of a Machine Learning-Based Model to Predict Peri-Implant Mucositis in Patients With Dental Implant Placement After 1-Year","authors":"Lin Liu,&nbsp;Bei Li,&nbsp;Yulei Qian,&nbsp;Ming Shen,&nbsp;Hao Zhang,&nbsp;Guoqing Li,&nbsp;Belal O. M. Muhaisen,&nbsp;Chunbo Tang","doi":"10.1111/clr.70125","DOIUrl":"10.1111/clr.70125","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objectives</h3>\u0000 \u0000 <p>To develop and validate an interpretable machine learning (ML) model for early prediction of peri-implant mucositis (PIM).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Material and Methods</h3>\u0000 \u0000 <p>This retrospective study enrolled patients receiving dental implants between October 2011 to June 2023 in our cohort to develop a ML-based model. External testing was subsequently performed utilizing datasets from two other hospitals. The least absolute shrinkage and selection operator (LASSO) was utilized for feature selection. Six ML algorithms were applied to analyze and identify the optimal model. Shapley Additive exPlanations (SHAP) interpretation was developed for model interpretation and personalized risk assessment.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>A total of 341 patients with 605 implants were included in our cohort and 101 patients with 170 implants were included in the external testing cohort. The Area Under Curves (AUCs) and Brier scores of the Support Vector Machine (SVM) model with 10 features were 0.902 and 0.129 in the validation set, while 0.797 and 0.256 in the external testing cohort, demonstrating superior discrimination and calibration compared to other algorithms. The SHAP algorithm interpreted that inadequate keratinized mucosa width, poor oral hygiene, restoration type (splinted crown/bridge), free-end edentulism, gingivitis, smoking habit, thin gingival biotype, and cement-retained restoration would elevate the occurrence of PIM. On the contrary, use of interproximal brushing/flossing and use of oral irrigator served as protective factors.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>This study developed the first interpretable ML-based tool for predicting PIM in patients with dental implant placement after 1-year, with the SVM model showing high discriminative ability and clinical utility for risk stratification.</p>\u0000 </section>\u0000 </div>","PeriodicalId":10455,"journal":{"name":"Clinical Oral Implants Research","volume":"37 7","pages":"806-820"},"PeriodicalIF":5.9,"publicationDate":"2026-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147619450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of Immediate Implant Placement Accuracy Between Novice and Experienced Operators Using Aggressive and Apical-Aggressive Thread Implant With dCAIS: An In Vitro Model Study","authors":"Wareeratn Chengprapakorn,&nbsp;Pravej Serichetaphongse,&nbsp;Jirasita Na Songkla,&nbsp;Kawisara Mongkalakorn","doi":"10.1111/clr.70124","DOIUrl":"10.1111/clr.70124","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p>This study evaluated the accuracy of immediate implant placements performed by operators with different experience levels in anterior and posterior maxillary models using dynamic computer-assisted implant surgery.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Materials and Methods</h3>\u0000 \u0000 <p>Twelve participants (six novice and six experienced operators) placed 120 implants in 3D-printed maxillary resin models designed to simulate immediate implant placement scenarios. Each operator placed five aggressive, fully self-tapping thread implants and five apical-aggressive thread implants targeting either anterior or posterior regions. Accuracy was assessed by measuring angular, 3D platform, 3D apex, and depth deviations between the planned and postoperative positions using cone-beam computed tomography imaging and specialized implant planning and evaluation software. Statistical analyses were conducted using linear mixed-effects models, with significance set at <i>p</i> &lt; 0.05.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>In the posterior region, novice operators showed significantly greater deviations in all parameters compared with experienced operators. In the anterior region, novices exhibited significantly higher angular deviation alone. Both groups demonstrated greater angular deviation when placing implants in the anterior region than in the posterior region. Regarding implant design, apical-aggressive thread implants were associated with greater angular deviation than fully self-tapping thread implants, especially when experienced operators worked in the anterior area and novice operators worked in the posterior region.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>Operator expertise plays a critical role in achieving accurate immediate implant placement, especially in the posterior maxilla. Implants with an aggressive, fully self-tapping design offer improved angular accuracy compared to apical self-tapping implants, suggesting that both implant design and operator experience could influence surgical outcomes.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Trial Registration</h3>\u0000 \u0000 <p>Thai Clinical Trials Registry (TCTR20240504005, TCTR20240503002)</p>\u0000 </section>\u0000 </div>","PeriodicalId":10455,"journal":{"name":"Clinical Oral Implants Research","volume":"37 7","pages":"796-805"},"PeriodicalIF":5.9,"publicationDate":"2026-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147507932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Crown Design, Cement Type and Margin Depth on the Removal of Cement Remnants Around Single Implant-Supported Restorations. An In-Vitro Study","authors":"Shaza Bishti,&nbsp;Christiane Apeldorn,&nbsp;Anne Rittich,&nbsp;Stefan Wolfart,&nbsp;Taşkın Tuna","doi":"10.1111/clr.70129","DOIUrl":"10.1111/clr.70129","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objectives</h3>\u0000 \u0000 <p>To assess the influence of crown design, cement type, and margin depth on the removal efficiency of residual cement around single implant-supported restorations.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Methods</h3>\u0000 \u0000 <p>Twelve mandibular models with a missing first molar were fabricated and provided with single implant analogs (centrally/distally placed) and two different crown designs (non-cantilever/cantilever). Three of each design had either a superficial (SM = −1 mm) or a deep (DM = −2 mm) submucosal margin. Crown restorations were made from CAD/CAM titanium-base abutments and monolithic zirconia (<i>n</i> = 120). Three different cements (glass ionomer [GI], polycarboxylate [PC], dual-curing resin cement [RC]) were used in a standardized way for crown cementation. Ten dentists removed excess cement using metal scalers. The volumetric values of residual cement were calculated (mm³). Statistical analyses assessed the effects of the investigated variables on residual cement volume (<i>p</i> &lt; 0.05).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The overall analysis showed no significant differences in the volume of cement remnants between both crown designs (non-cantilever: 0.42 ± 0.96 mm³; cantilever: 0.52 ± 0.98 mm³; <i>p</i> &gt; 0.05). For crown margin depth, a significantly higher cement volume for deeper margins (SM: 0.28 ± 0.62 mm³; DM: 0.68 ± 1.19 mm³; <i>p</i> &lt; 0.05) was found. The highest volume of cement remnants was found in the non-cantilever_DM_RC (1.19 ± 1.83 mm³), whereas the lowest value was found in non-cantilever_SM_GI and cantilever_SM_GI (0.00 ± 0.00 mm³). While crown design alone showed no statistically significant effect, its interaction with cement type was associated with improved cement removal in the cantilever group.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>Crown margin depth emerged as the dominant factor influencing cement removal. Although cement type also affected residual cement, with glass ionomer showing lower values overall, crown design did not provide a consistent advantage.</p>\u0000 </section>\u0000 </div>","PeriodicalId":10455,"journal":{"name":"Clinical Oral Implants Research","volume":"37 7","pages":"856-866"},"PeriodicalIF":5.9,"publicationDate":"2026-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/clr.70129","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147663727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Role of the Keratinized Mucosa in Peri-Implant Diseases Onset and Brushing Discomfort: A 10-Year Follow-Up","authors":"Fernanda Angelio da Costa Deller,&nbsp;Jeniffer Perussolo,&nbsp;André Barbisan de Souza,&nbsp;Ricardo Puziol de Oliveira,&nbsp;Flávia Matarazzo,&nbsp;Maurício G Araújo","doi":"10.1111/clr.70123","DOIUrl":"10.1111/clr.70123","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objectives</h3>\u0000 \u0000 <p>To evaluate the effect of narrow (&lt; 2 mm) and wide (≥ 2 mm) keratinized mucosa (KM) over 10 years on peri-implant diagnosis and brushing discomfort.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Materials and Methods</h3>\u0000 \u0000 <p>Eighty patients were initially evaluated. Demographic data, modified plaque index (mPI)/plaque index (PI), probing depth (PD), clinical attachment level (CAL), mucosal recession (REC), bleeding on probing (BoP), marginal bone level (MBL), brushing discomfort (BD), and peri-implant diagnosis were assessed. Implants were then divided into two groups according to the width of KM (narrow group: NG &lt; 2 mm and wide group: WG ≥ 2 mm). Patients who returned after 4 years (T4) were invited to participate in the 10-year reassessment (T10). The same parameters were reassessed, and statistical analysis was performed.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Thirty patients and 116 implants were included in this 10-year follow-up study. Although at T10 the prevalence of peri-implant diseases was not influenced by the KM width, the implants in the WG had 84% lower odds of being diagnosed with peri-implant diseases compared to those in the NG. Furthermore, the NG had higher PI, mPI, BoP, and REC than the WG. In addition, significant MBL was observed in the NG over 10 years. Both groups reduced BD, with no significant difference between them.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>A narrow KM favors plaque accumulation, mucosal recession, and peri-implant tissue inflammation in the long term, while a wider KM (≥ 2 mm) appears protective against peri-implant disease onset. Brushing discomfort declined over time irrespective of KM width.</p>\u0000 </section>\u0000 </div>","PeriodicalId":10455,"journal":{"name":"Clinical Oral Implants Research","volume":"37 7","pages":"785-795"},"PeriodicalIF":5.9,"publicationDate":"2026-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/clr.70123","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147536363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Efficacy of Three Combinatory Decontamination Protocols and BMP-2-Incorporated BioCaP-Based Regenerative Material in Treating Implants With Peri-Implantitis In Vivo","authors":"Ting Wang,&nbsp;Yuchen Shan,&nbsp;Tymour Forouzanfar,&nbsp;Junwei Liang,&nbsp;Zimu Zhao,&nbsp;Ping Sun,&nbsp;Gang Wu,&nbsp;Haiyan Lin","doi":"10.1111/clr.70126","DOIUrl":"10.1111/clr.70126","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p>To screen decontamination efficacy of three combinatory protocols and to evaluate the regenerative efficacy of bone morphogenetic protein 2-incorporated biomimetic calcium phosphate granules (BMP2-inc. BioCaP) in treating implants with peri-implantitis.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Material and Methods</h3>\u0000 \u0000 <p>Peri-implantitis model was established on 24 dental implants in 6 beagle dogs. The implants were decontaminated using mechanical curettage (MC) with either Chlorhexidine (CHX), photodynamic therapy (PDT), or both. The decontamination efficacy was assessed by measuring modified Sulcus Bleeding Index (mSBI), probing pocket depth (PPD), peri-implant sulcular fluid (PISF), and inflammatory cytokines of crevicular fluid (IL-8, IL-1β). Thereafter, GBR surgery was performed either without (Control) or with deproteinized bovine bone mineral (DBBM) or with BMP2-inc. BioCaP. Three fluoresceins were consequentially injected to assess bone growth rates. Eight weeks post-surgery, samples were subjected to micro-CT, confocal laser scanning microscopy and histomorphometric analyses.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>MC + CHX + PDT was associated with the lowest levels of mSBI, PPD, PISF, IL-1β, and IL-8 2 weeks post decontamination. Eight weeks post GBR surgery, BMP2-inc. BioCaP yielded significantly higher bone volume fraction, trabecular thickness, trabecular number, bone mineral density, and significantly lower trabecular separation than DBBM and Control. BMP2-inc. BioCaP bore significantly higher total fluorescence intensities than DBBM and Control at 2, 4, and 6 weeks, and was also associated with significantly higher bone-to-implant contact and new bone height than DBBM and Control.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>Within the limitations of this study, MC + CHX + PDT decontamination and BMP-2-incorporated BioCaP showed an application potential in treating peri-implantitis. Further studies with a long monitoring span are necessary before clinical application.</p>\u0000 </section>\u0000 </div>","PeriodicalId":10455,"journal":{"name":"Clinical Oral Implants Research","volume":"37 7","pages":"821-834"},"PeriodicalIF":5.9,"publicationDate":"2026-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147636049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Association of Transmucosal Emergence Geometry and Peri-Implant Diseases Prevalence Around Bone- and Tissue-Level Implants: A Cross-Sectional Study","authors":"Clemens Raabe,&nbsp;Manrique Fonseca,&nbsp;Vivianne Chappuis,&nbsp;Gustavo Avila-Ortiz,&nbsp;Diogo Moreira Rodrigues,&nbsp;Pablo Galindo-Moreno,&nbsp;Emilio Couso-Queiruga","doi":"10.1111/clr.70131","DOIUrl":"10.1111/clr.70131","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objectives</h3>\u0000 \u0000 <p>This cross-sectional study primarily aimed at investigating the association between the transmucosal emergence geometry and the prevalence of peri-implant diseases in bone- and tissue-level implants (BL/TL). As secondary objectives, the association of other implant-, prosthesis-, and patient-related variables with crestal bone levels (CBL) and additional radiographic findings was explored.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Material and Methods</h3>\u0000 \u0000 <p>Patients with non-molar single tooth implant-supported prostheses were retrospectively identified for inclusion. Clinical and radiographic examinations were performed cross-sectionally to assess peri-implant diseases (peri-implant mucositis, peri-implantitis), emergence geometry at the transmucosal region (profile type, emergence angles at two levels, and prosthetic platform height), and peri-implant radiographic variables, including CBL. Data were analyzed using multivariate regression.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>A total of 332 implants (166 BL/166 TL) in 266 patients (60 ± 17 years) were evaluated at a mean of 11.2 ± 1.5 years after implant placement. Peri-implant mucositis was significantly influenced by the crown emergence angle (Level 2; OR = 1.03, <i>p</i> = 0.01) and peri-implantitis by implant diameter (OR = 3.82, <i>p</i> &lt; 0.0001). Crown emergence angles &gt; 30° in BL implants and &gt; 48° in TL implants were consistently associated with peri-implant diseases. Mean CBL was 0.54 ± 1.34 mm, with lower values in TL (−0.24 mm; <i>p</i> = 0.036), females (−0.27 mm, <i>p</i> = 0.029), and implants with greater platform height (−0.175 mm/mm, <i>p</i> = 0.01). Peri-implant sheathing was detected in 13.4% of implants, showing no association with implant-related characteristics.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>Wider crown emergence angles were associated with peri-implant diseases, whereas wider implant diameters were associated with increased peri-implantitis prevalence. TL implant design and greater platform height were associated with reduced CBL.</p>\u0000 </section>\u0000 </div>","PeriodicalId":10455,"journal":{"name":"Clinical Oral Implants Research","volume":"37 7","pages":"883-895"},"PeriodicalIF":5.9,"publicationDate":"2026-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/clr.70131","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147663675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prior Tooth Mobility and Furcation Involvement Are Associated With Higher Dental Implant Failure Rates: A Propensity-Matched Cohort Study","authors":"Georgios S. Chatzopoulos,&nbsp;Larry F. Wolff","doi":"10.1111/clr.70127","DOIUrl":"10.1111/clr.70127","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objectives</h3>\u0000 \u0000 <p>To compare the long-term survival of dental implants placed in sites with a documented pre-operative history of severe tooth mobility or advanced furcation involvement against a matched control group.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Material and Methods</h3>\u0000 \u0000 <p>This retrospective cohort study analyzed patient records from a multi-university network. Implants were categorized based on the pre-extraction site history: Mobility Class (M2), Mobility Class (M3), Furcation Grade (G3), Furcation Grade (G4), and a control group. A 1:4 propensity score matching (PSM) was performed to balance baseline covariates (age, sex, smoking, diabetes, implant arch).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>After PSM, a balanced cohort of 3925 implants (785 risk implants, 3140 control implants) was analyzed. The 10-year survival probability for the matched control group was 98.9%. All risk groups demonstrated significantly lower survival, with M2 at 94.6% and G4 at 95.5%. The adjusted multilevel Cox model confirmed a significantly higher risk of failure for all exposure groups. The adjusted hazard ratio was 2.3 for M2 (95% CI: 1.2–4.4), 3.8 for M3 (95% CI: 1.9–7.5), 3.0 for G3 (95% CI: 1.4–6.5), and 4.5 for G4 (95% CI: 2.1–9.8), compared to the matched controls (all <i>p</i> &lt; 0.01).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>A pre-extraction history of severe tooth mobility or advanced furcation involvement at an implant site is significantly associated with long-term implant failure. Rather than being independent biological causes, these clinical signs likely serve as historical markers for severe localized bone loss and heightened periodontitis susceptibility and should be carefully considered during risk assessment and treatment planning.</p>\u0000 </section>\u0000 </div>","PeriodicalId":10455,"journal":{"name":"Clinical Oral Implants Research","volume":"37 7","pages":"835-840"},"PeriodicalIF":5.9,"publicationDate":"2026-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/clr.70127","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147615931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Clinical Effects of Angulated Single-Implant Crowns With Different Retention Methods in the Aesthetic Area: A Retrospective Cohort Study With 12–24 Months Follow-Up","authors":"Xiaying Ding,&nbsp;Yudi Wang,&nbsp;Manhou Choi,&nbsp;Hao Chen,&nbsp;Mengfei Yu,&nbsp;Yu Wang","doi":"10.1111/clr.70128","DOIUrl":"10.1111/clr.70128","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p>The objective of this study is to evaluate the clinical efficacy of angulated single-implant crowns using the hybrid retention versus pure screw-retained restorations in the aesthetic area.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Materials and Methods</h3>\u0000 \u0000 <p>A retrospective study design was adopted. Patients were included and divided into two groups according to the abutment types they had used: the hybrid retention (AS) and screw-retained retention (ASC). Implant survival rate, mechanical complications, bleeding on probing proportion, probing depth, plaque index, Jemt papillary index, marginal displacement, pink/white esthetic score (PES/WES), emergence angle, marginal bone loss (MBL), and buccal bone thickness (BBT) resorption were evaluated.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>43 patients were included (AS: 22, ASC: 21). The average follow-up was 16.88 months. No cases of implant failure were observed. Mechanical complications were observed in 31.82% of the AS group and 9.52% of the ASC group (<i>p</i> &gt; 0.05). The MBL showed no significant difference (<i>p</i> &gt; 0.05). The BBT resorption was significantly higher in the ASC group than the AS group (<i>p</i> &lt; 0.05). The PES was statistically higher in the AS group than the ASC group (<i>p</i> &lt; 0.01). No other significant difference was observed.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>Both AS and ASC abutments achieved acceptable clinical short-term outcomes for maxillary anterior implant restorations, with 100% observed implant survival rates and no statistically significant differences in survival or peri-implant bone level stability. The AS group exhibited potential advantages in soft-tissue contour and buccal bone thickness preservation. Although the incidence of mechanical complications was higher in the AS group clinically, the difference did not reach statistical significance, warranting further validation.</p>\u0000 </section>\u0000 </div>","PeriodicalId":10455,"journal":{"name":"Clinical Oral Implants Research","volume":"37 7","pages":"841-855"},"PeriodicalIF":5.9,"publicationDate":"2026-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147630350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Augmented Reality Improves Accuracy of Dynamic Computer-Assisted Implant Surgery: An In Vitro Analysis","authors":"Arndt Guentsch,&nbsp;Shengtong Han","doi":"10.1111/clr.70134","DOIUrl":"10.1111/clr.70134","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Objective</h3>\u0000 \u0000 <p>To assess the accuracy of dynamic computer-assisted implant surgery (dCAIS) performed with and without augmented reality (AR) smart-glasses visualization under standardized laboratory conditions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Materials and Methods</h3>\u0000 \u0000 <p>A standardized typodont model with bounded and unbounded edentulous spaces was prepared to receive polyurethane blocks. Five implants were virtually planned using implant-planning software, and the plan was transferred to a miniaturized dynamic navigation system. Forty simulated surgeries (<i>n</i> = 40; total 200 osteotomies) were performed under two conditions: (a) standard screen-based guidance (dCAIS) and (b) smart-glasses guidance (dCAIS+SG) projecting real-time navigation data into the operator's field of view. Postoperative CBCT scans were used to compare planned and achieved osteotomies. The 3D deviation at the crestal level was defined as the primary outcome parameter. Means, standard deviations, and 95% confidence intervals were calculated, and data were analyzed using paired <i>t</i>-tests (trueness and precision).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The mean 3D deviation at the crest was significantly lower with smart-glasses visualization (dCAIS: 0.32 ± 0.17 mm; dCAIS+SG: 0.27 ± 0.16 mm; <i>p</i> = 0.02), primarily due to reduced 2D mesiodistal deviation (0.20 ± 0.16 mm vs. 0.09 ± 0.07 mm; <i>p</i> &lt; 0.0001). Angular deviation remained low and comparable between groups (0.40° ± 0.31° vs. 0.34° ± 0.35°; <i>p</i> = 0.2). Both workflows exhibited similar precision across all parameters.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>AR smart-glasses enhanced the trueness of dynamic navigation without affecting precision. Integrating AR into dCAIS enables continuous visualization of navigational data, potentially improving ergonomic workflow and maintaining visual focus on the surgical field.</p>\u0000 </section>\u0000 </div>","PeriodicalId":10455,"journal":{"name":"Clinical Oral Implants Research","volume":"37 7","pages":"896-904"},"PeriodicalIF":5.9,"publicationDate":"2026-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/clr.70134","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147731416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}