Clinical implant dentistry and related research最新文献

{"title":"Retaining Complete Overdentures With Immediately Loaded One-Piece Mini-Implants: A 24-Month Prospective Clinical Study.","authors":"Alexander De Greef, Samuel Akhondi, Bahoz Sanaan, Wim Coucke, Marc Quirynen, David Norré","doi":"10.1111/cid.70188","DOIUrl":"10.1111/cid.70188","url":null,"abstract":"<p><strong>Objectives: </strong>To evaluate 24-month clinical and radiographic outcomes of a minimally invasive protocol using flaplessly placed, immediately loaded one-piece mini-implants to retain complete maxillary and mandibular overdentures.</p><p><strong>Materials and methods: </strong>This prospective single-center clinical study included 25 fully edentulous patients requiring improved denture retention in one or both jaws. Patients received six mini-implants in the maxilla and/or four mini-implants in the mandible. Existing or newly fabricated complete dentures were converted chairside into implant-retained overdentures for immediate loading. Implant survival, peri-implant clinical attachment level changes, and radiographic marginal bone level changes were assessed at baseline, 1 year, and 2 years.</p><p><strong>Results: </strong>A total of 158 mini-implants were placed, 120 in the maxilla and 38 in the mandible. At 24 months, 145 implants remained in function, corresponding to implant-level survival of 91.8%. Survival was 91.7% in the maxilla and 92.1% in the mandible. Mean radiographic marginal bone loss was 0.54 ± 1.64 mm in the maxilla and 0.80 ± 1.17 mm in the mandible, with no statistically significant interjaw difference (p = 0.774). Mean peri-implant clinical attachment loss was 0.89 ± 1.27 mm and 0.41 ± 0.57 mm, respectively, with significantly greater attachment loss in the maxilla (p < 0.001).</p><p><strong>Conclusion: </strong>Flapless placement and immediate loading of one-piece mini-implants provided favorable 24-month survival and limited peri-implant tissue changes when used to retain complete overdentures in selected edentulous patients. The protocol showed clinically relevant outcomes in both jaws, including the maxilla, where evidence for removable overdentures retained by unsplinted one-piece mini-implants remains limited. This minimally invasive approach may expand treatment options for edentulous patients with reduced denture retention, narrow residual ridges, or limited willingness to undergo augmentation procedures.</p>","PeriodicalId":93944,"journal":{"name":"Clinical implant dentistry and related research","volume":"28 5","pages":"e70188"},"PeriodicalIF":4.0,"publicationDate":"2026-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149221078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparing Accuracy of Cylindrical and Tapered Implants Using Autonomous Robotic System: A Randomized Controlled Trial.","authors":"Miaomiao Tian, Zhiyuan Shu, Shanshan Shi, Hongbo Wei","doi":"10.1111/cid.70159","DOIUrl":"10.1111/cid.70159","url":null,"abstract":"<p><strong>Objectives: </strong>This study aimed to systematically evaluate the effect of implant shape (cylindrical versus tapered implant) on the accuracy of placement using an autonomous robotic system in patients with single-tooth loss.</p><p><strong>Materials and methods: </strong>Forty individuals with a single missing tooth were randomly assigned to receive either a cylindrical implant (CI) or a tapered implant (TI). All implants were digitally planned and placed with an autonomous robotic system. The primary outcomes were coronal, apical, and angular deviations. Secondary outcomes included surgery time and insertion torque value (ITV).</p><p><strong>Results: </strong>A significantly smaller apical deviation was observed in the TI group (0.70 ± 0.23 mm) compared to the CI group (0.91 ± 0.38 mm; p < 0.05), and there was statistically smaller angular deviation in the TI group (1.18° ± 0.46°) than the CI group (1.76° ± 1.02°; p < 0.05). Furthermore, the implantation time was also significantly shorter in the TI group (5.88 ± 2.34 min) than the CI group (9.84 ± 5.45 min; p < 0.01), and the TI group (24.33 ± 11.47 N cm) was statistically lower than the CI group (31.75 ± 10.17 N cm; p < 0.05) in ITV. No statistically significant differences were observed regarding coronal deviation and osteotomy duration between the two groups.</p><p><strong>Conclusions: </strong>Considering the study's limitations, both implant shapes were automatically placed with clinically acceptable accuracy. Tapered implants, however, demonstrated statistically superior apical and angular positioning accuracy and a more efficient insertion process without compromising primary stability. These findings warrant further investigation to confirm their clinical relevance.</p><p><strong>Trail registration: </strong>ChiCTR2500105588.</p>","PeriodicalId":93944,"journal":{"name":"Clinical implant dentistry and related research","volume":"28 3","pages":"e70159"},"PeriodicalIF":4.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147876857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Robotic Quad Zygomatic Implant Surgery Accuracy Ex Vivo With a New Semi-Autonomous Optically-Driven Haptic System.","authors":"Alessandro Pozzi, James Chow, Andrea Laureti, Lorenzo Arcuri, Ilaria Cammarota, Alessandra Nardi, Hom-Lay Wang","doi":"10.1111/cid.70155","DOIUrl":"10.1111/cid.70155","url":null,"abstract":"<p><strong>Objectives: </strong>To evaluate ex vivo accuracy of robotic computer-assisted implant surgery (r-CAIS) for quad zygomatic implant (ZI) placement with a novel semi-autonomous, optically-driven, haptic-assisted system.</p><p><strong>Methods: </strong>Two expert operators placed ZIs in human cadavers. Accuracy was evaluated by superimposing pre- and post-operative cone-beam computed tomography (CBCT) scans, measuring linear (mm) on the x-, y-, and z- axes and angular (degrees) deviations. Sample size was calculated. The main analysis focused on composite outcomes (global platform, global apical, and angular deviation), while extended analyses examined deviations on individual spatial axes (buccal-lingual, mesial-distal, depth, and non-depth) for both implant platform and apex. Three multivariate models were executed on global platform, global apical, and angular deviation considering implant position (anterior vs. posterior) and quadrant (left vs. right).</p><p><strong>Results: </strong>Forty ZIs were placed in 10 human cadavers. The mean global deviations at implant platform and apex were 1.16 mm (standard deviation (SD) 0.47) and 1.51 mm (SD 0.70), with mean angular deviation of 1.04° (SD 0.65°). In the multivariate models, implant position was found to be significant for global platform deviation (p = 0.0218), with posterior implants performing better, and for angular deviation (p = 0.0465), with anterior implants performing better.</p><p><strong>Conclusion: </strong>The optically driven haptic-assisted robotic system demonstrated high accuracy in quad ZI surgery, with all implants placed without intraoperative complications or significant errors impacting adjacent anatomical structures. Mean global linear deviations of 1 and 1.5 mm at platform and apex, and 1° of angular deviation were experienced. Further research is necessary to validate these promising results in vivo.</p>","PeriodicalId":93944,"journal":{"name":"Clinical implant dentistry and related research","volume":"28 3","pages":"e70155"},"PeriodicalIF":4.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13125970/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147792334","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 PTFE Coating and PTFE Tape Wrapping Abutment Screw After Cyclic Loading: An In Vitro Study.","authors":"Poonnarat Kongkhuntian, Weerapan Aunmeungtong, Pathawee Khongkhunthian","doi":"10.1111/cid.70162","DOIUrl":"10.1111/cid.70162","url":null,"abstract":"<p><strong>Objective: </strong>This study aimed to compare the effect of PTFE tape wrapping and PTFE-coated titanium alloy screws on the removal torque after cyclic loading and on preload values under repetitive tightening.</p><p><strong>Methods: </strong>A total of 60 titanium abutment screws were allocated to three surface-treatment groups (n = 20 each): untreated (Control), PTFE tape-wrapped (Wrap), and PTFE-coated (Coat). Within each group, 10 specimens underwent cyclic loading, whereas 10 were assigned to preload evaluation. Cyclic loading followed ISO 14801:2016. Screws were tightened to 30 N·cm, retightened after 10 min, and subjected to 300 000 cycles at 200 N using a fatigue testing machine (DYNA-MESS Prüfsysteme GmbH, Aachen, Germany). Removal torque was measured with a digital torque gauge (BTGE50CN, Tohnichi, Japan). For preload assessment, each specimen completed 10 tightening-loosening cycles at the same torque during which tensile force was recorded using a customized device. One representative screw per group was analyzed by SEM and micro-CT before and after loading to evaluate surface and structural changes.</p><p><strong>Results: </strong>After cyclic loading, the removal torque did not differ significantly between the Control group (17.58 ± 1.85 N·cm) and the Wrap group (17.50 ± 1.77 N·cm), whereas the Coat group demonstrated significantly lower removal torque (14.71 ± 2.35 N·cm; p < 0.05). In the preload test, preload progressively decreased in the Control (-3.13 N per cycle) and Coat groups (-0.51 N per cycle), while the Wrap group showed a consistent increase with repeated tightening (+8.22 N per cycle). SEM revealed surface wear and partial loss of PTFE material after loading, particularly in the coated specimens. Micro-CT analysis showed no detectable differences in internal adaptation among groups before or after cyclic loading.</p><p><strong>Conclusions: </strong>PTFE tape wrapping increased preload during repeated tightening but did not improve removal torque after cyclic loading compared with those of untreated screws. Although PTFE-coated screws produced the highest initial preload, they were associated with reduced removal torque after loading. SEM analysis confirmed coating deterioration, whereas internal fit remained comparable across groups.</p>","PeriodicalId":93944,"journal":{"name":"Clinical implant dentistry and related research","volume":"28 3","pages":"e70162"},"PeriodicalIF":4.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147990580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Resonance Frequency Analysis and Clinical Outcomes in Implant Dentistry: A Systematic Review and Meta-Analysis.","authors":"Angela Tisci, Francesco Fanelli, Vito Carlo Alberto Caponio, Khrystyna Zhurakivska, Mario Dioguardi, Giuseppe Troiano","doi":"10.1111/cid.70156","DOIUrl":"10.1111/cid.70156","url":null,"abstract":"<p><strong>Objectives: </strong>Given the growing use of resonance frequency analysis in clinical implantology and the inconsistent evidence regarding its prognostic value, this systematic review aimed to clarify the association between implant stability quotient (ISQ) with insertion torque (IT), marginal bone loss (MBL), and implant survival/success rate.</p><p><strong>Material and methods: </strong>Following PRISMA guidelines, a comprehensive literature search was conducted across MEDLINE, Scopus, and Web of Science to answer the PIO question: \"In systemically healthy patients undergoing implant placement, are ISQ values associated with intraoperative and postoperative surrogate parameters (IT and MBL) and clinical outcomes such as implant survival and success?\" Risk of bias was assessed using design-specific methodological tools.</p><p><strong>Results: </strong>Forty-eight studies were included, and 20 were eligible for quantitative analysis of ISQ-IT correlation. A moderate and statistically significant association was observed (pooled r = 0.44; 95% CI: 0.32-0.55, p < 0.001), with substantial heterogeneity (I² > 90%). Three studies assessed baseline ISQ values and implant survival. Although surviving implants showed higher ISQ values (mean difference = 10.22), the pooled estimate was not statistically significant and remained highly heterogeneous. Quantitative synthesis for MBL and implant success was not feasible due to inconsistent reporting and methodological variability.</p><p><strong>Conclusions: </strong>ISQ shows a moderate correlation with IT, supporting its role as a complementary indicator of primary implant stability. However, high heterogeneity and limited certainty of evidence restrict its clinical interpretability. Current evidence does not support baseline ISQ values as independent predictors of MBL or implant survival.</p>","PeriodicalId":93944,"journal":{"name":"Clinical implant dentistry and related research","volume":"28 3","pages":"e70156"},"PeriodicalIF":4.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13163645/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147876929","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":"Outcomes of One-Piece and Two-Piece Dental Implants After 15-17 Years: Follow-Up of a Randomized Clinical Trial.","authors":"Miha Pirc, Kevser Pala, Fabiene Rusch, Ronald E Jung, Daniel S Thoma, Marc Balmer","doi":"10.1111/cid.70157","DOIUrl":"10.1111/cid.70157","url":null,"abstract":"<p><strong>Objectives: </strong>To compare the biological, technical, and esthetic outcomes of one-piece and two-piece dental implant systems after 15-17 years in the follow-up of a previously conducted randomized clinical trial.</p><p><strong>Material and methods: </strong>This study represents the 15-17-year follow-up of a previously conducted randomized clinical trial included 60 patients requiring dental implant therapy. They were randomly assigned to receive either a one-piece (STM) or two-piece (BRA) implant system. Final restoration delivery served as baseline, after which all patients entered a structured maintenance program. Clinical re-evaluations were performed at 1, 5, 10, 12, 15, and 17 years. Biological, technical, radiographic, and esthetic parameters were assessed at each follow-up visit using standardized clinical and radiographic protocols.</p><p><strong>Results: </strong>Thirty-nine patients with 95 implants, all of whom had completed a 15- or 17-year follow-up visit, were included in the final analysis (STM: 22 patients/45 implants; BRA: 17 patients/50 implants), with a mean follow-up of 16.4 ± 1.1 years. The cumulative implant survival rate was 95.0% (STM: 91.8%; BRA: 98.0%). Marginal bone levels at 15-17 years were 0.08 ± 1.15 mm (STM) and 1.53 ± 0.81 mm (BRA). Clinical parameters remained stable in both groups, although BOP was higher in the STM group. Peri-implant mucositis was observed in 49.7% of all implants and peri-implantitis in 13.3%, with higher rates in the STM group. Technical complications occurred in 28 implants (STM: 23; BRA: 5), with the STM group showing a higher complication rate (implant level: 35.4% vs. 5.8%). Esthetic observations included visible crown margins in 62 implants and mucosal shimmering in 54 implants, with no implant fractures reported.</p><p><strong>Conclusions: </strong>Both implant systems demonstrated favorable long-term outcomes with high survival rates. While the one-piece system showed superior marginal bone preservation, it was associated with a higher rate of technical complications.</p><p><strong>Trial registration: </strong>ClinicalTrials.gov identifier: KEK-ZH-Nr 2014-0201.</p>","PeriodicalId":93944,"journal":{"name":"Clinical implant dentistry and related research","volume":"28 3","pages":"e70157"},"PeriodicalIF":4.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13170413/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147936459","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":"Crestal Bone Loss and Peri-Implant Conditions at Tissue-Level Implants: Influence of Prosthesis Type After 25 Years.","authors":"Clemens Raabe, Manrique Fonseca, Andrea Roccuzzo, Martin Schimmel, Giovanni E Salvi, Vivianne Chappuis, Emilio Couso-Queiruga","doi":"10.1111/cid.70158","DOIUrl":"10.1111/cid.70158","url":null,"abstract":"<p><strong>Objective: </strong>To evaluate long-term crestal bone level changes (ΔCBL) and prevalence of peri-implant conditions according to the type of implant-supported fixed dental prosthesis (IFDP), and to identify implant-, prosthetic-, and patient-related factors associated with ΔCBL.</p><p><strong>Materials and methods: </strong>This single-center observational study evaluated patients rehabilitated with single crowns (SCs), splinted crowns (SPs), or bridges (BRs) on tissue-level implants after 10 and 25 years of function. Standardized clinical and radiographic evaluations were performed, and peri-implant conditions were diagnosed according to established consensus definitions.</p><p><strong>Results: </strong>A total of 147 patients with 233 implants were included. The prevalence of peri-implantitis (PI) increased from 10 to 25 years, from 2.3% to 7.8% for SC, from 1.6% to 6.3% for SP, and from 0% to 4.9% for BR, with no significant differences between IFDP types at either time point (p ≥ 0.95). SP tended to have higher peri-implant mucositis (PM) rates at 25 years (87.3%), compared to SC (74.4%) and BR (80.5%). Mean ΔCBL was -0.37 ± 0.91 mm for SC, -0.25 ± 0.85 mm for SP, and -0.70 ± 1.0 mm for BR, with no significant differences between IFDP types (p = 0.37). Multivariate analyses demonstrated that greater ΔCBL was significantly associated with incisor region location (-0.74 mm), increased probing depth (-0.16 mm per mm), and suppuration on probing (-0.97 mm), all p ≤ 0.05. In contrast, prosthetic retention, marginal misfit, and prosthet emergence geometry were not significantly associated with ΔCBL.</p><p><strong>Conclusions: </strong>Over 25 years, the type of IFDP did not significantly affect ΔCBL or the prevalence of PM and PI around tissue-level implants. Long-term bone stability was primarily influenced by implant location in the incisor region, increased probing depths, and the presence of suppuration.</p>","PeriodicalId":93944,"journal":{"name":"Clinical implant dentistry and related research","volume":"28 3","pages":"e70158"},"PeriodicalIF":4.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13174906/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147944157","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":"Long-Term Stability of Bone Graft After Implant Failure in Lateral Sinus Floor Elevation: A Retrospective Paired Study.","authors":"Mengdie Fu, Danji Zhu, Luyao Song, Zichun Xia, Wenyi Xu, Zhiwei Jiang, Guoli Yang","doi":"10.1111/cid.70154","DOIUrl":"10.1111/cid.70154","url":null,"abstract":"<p><strong>Objectives: </strong>This retrospective paired cohort study aimed to compare the three-dimensional volumetric shrinkage of endo-sinus bone graft between failed and surviving implants after one-stage lateral sinus floor elevation (LSFE), and to assess the feasibility of implant replacement without additional augmentation.</p><p><strong>Materials and methods: </strong>Twenty failed implants were matched 1:1 with 20 surviving implants based on key clinical variables. Cone-beam computed tomography scans at five time points were analyzed to quantify graft volume and height changes. Surgical methods and clinical outcomes for implant replacement were also recorded. Paired t-test and repeated measures ANOVA were used to compare the radiographic outcomes.</p><p><strong>Results: </strong>The shrinkage rate of endo-sinus bone grafts was statistically comparable between failed and surviving implants (32.54% ± 20.68% vs. 21.93% ± 10.54% at 1-year follow-up, p > 0.05). Residual bone graft reached adequate height to support replaced implants. Most failed sites were successfully restored with direct implant replacement, and reinserted implants achieved a 90% survival rate over a mean follow-up of 45 months.</p><p><strong>Conclusions: </strong>The findings suggest that implant failure after LSFE does not necessarily correlate with accelerated resorption of bone graft, supporting the feasibility of direct implant replacement without further grafting.</p>","PeriodicalId":93944,"journal":{"name":"Clinical implant dentistry and related research","volume":"28 3","pages":"e70154"},"PeriodicalIF":4.0,"publicationDate":"2026-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147792298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of Schneiderian Membrane Pathological Thickening on Transcrestal Sinus Floor Elevation: A Prospective Study.","authors":"Xiaoyu Li, Baosheng Li, Zhaoyi Yin, Shuaicen Meng, Xintong Zhao, Yue Sun, Wenting Chen, Qing Cai, Weiyan Meng","doi":"10.1111/cid.70149","DOIUrl":"10.1111/cid.70149","url":null,"abstract":"<p><strong>Objectives: </strong>To investigate the differential effects of primary (PPT) and odontogenic (OPT) pathological Schneiderian membrane thickening on outcomes of transcrestal sinus floor elevation (TSFE) with simultaneous implant placement.</p><p><strong>Material and methods: </strong>This prospective cohort study enrolled 89 patients (123 implants), divided into normal, PPT, and OPT groups. All patients underwent TSFE with simultaneous implant placement. The Schneiderian membrane perforation, early implant failure, postoperative complications, and implant stability quotient (ISQ) value were recorded. Cone beam computer tomography was obtained preoperatively, immediate postoperatively, and 6 months postoperatively to perform linear measurements including Schneiderian membrane thickness (SMT), residual bone height (RBH), sinus floor elevation height (SFEH), endo-sinus bone gain (ESBG), and graft material resorption height (GMRH).</p><p><strong>Results: </strong>No early implant failure or postoperative complications were observed, and no significant difference in ISQ values was found among the three groups (p = 0.116). The OPT group had a significantly higher membrane perforation rate (30.4%) than the normal (9.5%) and PPT (7.7%) groups (p = 0.023), lower ESBG (2.88 ± 1.59 mm vs. normal 4.02 ± 1.63 mm, p = 0.015), and higher GMRH (2.98 ± 1.84 mm vs. normal 1.37 ± 1.15 mm/PPT 1.41 ± 1.26 mm, p < 0.001). PPT showed no significant differences in ESBG/GMRH versus normal (p > 0.05).</p><p><strong>Conclusions: </strong>Our results demonstrate that neither primary nor odontogenic pathological Schneiderian membrane thickening influences the early success rate of implants placed simultaneously with transcrestal sinus floor elevation. Nevertheless, odontogenic pathological Schneiderian membrane thickening significantly increases the incidence of Schneiderian membrane perforation and decreases the formation of new bone.</p>","PeriodicalId":93944,"journal":{"name":"Clinical implant dentistry and related research","volume":"28 2","pages":"e70149"},"PeriodicalIF":4.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147701172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Immediate Loading on Tapered Versus Straight Multiple Implants: A 3-Year Follow-Up of a Randomized Clinical Trial.","authors":"Young Woo Song, Seung-Hyun Park, Franz J Strauss, Sung Jin Yoo, Jin-Young Park, Jae-Kook Cha, Ui-Won Jung","doi":"10.1111/cid.70147","DOIUrl":"10.1111/cid.70147","url":null,"abstract":"<p><strong>Objective: </strong>To evaluate the clinical and radiographic outcomes at 3 years following immediate loading of tapered implants (TI) versus straight implants (SI) from a randomized controlled trial (RCT).</p><p><strong>Materials and methods: </strong>Of the 41 patients who received 93 implants in the original RCT (TI group: 23 patients, 50 implants; SI group: 18 patients, 43 implants), those who completed 3-year follow-up were included in this analysis. Implant survival and success rates, as well as changes in marginal bone loss (MBL), were assessed and compared using Kaplan-Meier curves, Cox proportional hazards models, and linear mixed-effects models.</p><p><strong>Results: </strong>A total of 28 patients with 61 implants were evaluated (TI group: 15 patients, 32 implants; SI group: 13 patients, 29 implants). At 3 years post-immediate loading, cumulative survival rates at the patient level were 95.8% for the TI group and 78.3% for the SI group (intergroup p = 0.109). At the implant level, survival rates were 96.2% for TI and 90.0% for SI (intergroup p = 0.351). All implant failures occurred within the first year (1 implant in TI; 5 implants in SI), and no further losses were recorded thereafter. However, two TI implants in a single patient exhibited progressive peri-implantitis during follow-up. Mean MBL values were 0.61 ± 1.70 mm for the TI group and 0.53 ± 0.53 mm for the SI group, with no statistically significant differences between groups (intergroup p = 0.428).</p><p><strong>Conclusion: </strong>It could be cautiously concluded that the TI rather than the SI might be a more predictable option in terms of achieving an optimized initial stability for immediate loading in the posterior region. Once osseointegration was successfully achieved, however, the macro-design of the implant might not have an influence on the clinical and radiographic outcomes including the osseointegrated state during the 3 years of observational period.</p><p><strong>Trail registration: </strong>KCT0002489; https://cris.nih.go.kr/cris/search/detailSearch.do?search_lang=E&focus=reset_12&search_page=L&pageSize=10&page=undefined&seq=19032&status=5&seq_group=8332.</p>","PeriodicalId":93944,"journal":{"name":"Clinical implant dentistry and related research","volume":"28 2","pages":"e70147"},"PeriodicalIF":4.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13080229/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147694304","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}