The International journal of oral & maxillofacial implants最新文献

{"title":"Influence of Screw Access Hole Diameter and Preparation Method on the Fit and Fracture Resistance of Implant-Supported Monolithic Zirconia Crowns.","authors":"Min-Gyung Seo, Kyung-Ho Ko, Yoon-Hyuk Huh, Lee-Ra Cho, Chan-Jin Park","doi":"10.11607/jomi.12000","DOIUrl":"https://doi.org/10.11607/jomi.12000","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate how screw access hole (SAH) presence, diameter, and preparation method affect marginal and internal fit and fracture resistance of implant-supported monolithic zirconia crowns.</p><p><strong>Materials and methods: </strong>Seventy-two crowns were assigned to six groups (n=12): no SAH; 1-, 2-, or 3-mm presintered SAHs; a 1-mm SAH enlarged to 3 mm after cementation; or a 3-mm SAH prepared after cementation in crowns without an initial SAH. Marginal and internal fit was assessed in the first four groups by the silicone replica technique. After thermocycling and cyclic loading, fracture load, Weibull parameters, fracture patterns, and scanning electron microscopy findings were evaluated.</p><p><strong>Results: </strong>Overall discrepancy and internal gap were greater without an SAH (184.7 and 182.1 μm) than with an SAH (54.7-65.9 and 60.1-71.1 μm) (P<.05), with no differences among SAH diameters (P>.05). Fracture loads were higher for no SAH and a 1-mm SAH than for all groups with 2- or 3-mm openings (P<.001). Among final 3-mm openings, preparation method did not affect mean fracture load (P>.05), although handpiece-prepared groups had lower Weibull moduli.</p><p><strong>Conclusions: </strong>The 1-mm SAH improved crown fit without reducing fracture resistance, whereas openings of 2 mm or larger reduced fracture resistance. For 3-mm SAHs, preparation method did not affect mean fracture load.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-24"},"PeriodicalIF":1.7,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149225652","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":"Factors Affecting Changes in the Health Status of Implants with a Laser-Microgrooved Collar Surface: A Long-Term Retrospective Study.","authors":"Renzo Guarnieri, Rodolfo Reda, Alessio Zanza, Giuseppe Ferri, Marta Cianfriglia, Dario Di Nardo, Luca Testarelli","doi":"10.11607/jomi.11922","DOIUrl":"https://doi.org/10.11607/jomi.11922","url":null,"abstract":"<p><strong>Objectives: </strong>to evaluate the factors influencing the evolution of health status of dental implants with a laser micro-grooved collar surface (LaserLokÒ) during 10 years of implant function, in patients enrolled in preventive maintenance and attending a private practice.</p><p><strong>Materials and methods: </strong>Dental records of 60 patients receiving 240 implants (112 tissue level, 128 bone level) with LMS were retrospectively evaluated. Patient-, implant/prosthetic- and maintenance-related factors influencing changes of peri-implant tissue conditions were analyzed using a generalized estimating equation (GEE).</p><p><strong>Results: </strong>Patient health conditions remained the same in 42% of cases (35% with peri-implant health (PH) and 7% with peri-implantitis (P), worsened in 36% (29% from PH to peri-implant mucositis (PIM), and 7% from PH to P) and improved in 22% (15% from PIM to PH and 7% from PH to peri-implant marginal bone gain). PIM tended to increase in subjects with history of periodontitis, difficulty cleaning around the implant, and higher plaque scores, while P tended to increase in patients who were smokers or were affected by systemic diseases. Moreover, the worsening in PIM was also associated with prosthetic emergence angle 30°, while the worsening in P was also associated with cemented crowns.</p><p><strong>Conclusions: </strong>Peri- implant disease progression over time is influenced by modifiable patient-, prosthetic-, and maintenance-related factors, highlighting the need for personalized care and proactive risk factor management to prevent disease progression.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-33"},"PeriodicalIF":1.7,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149225659","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":"Systematic Review of Artificial Intelligence in Pre-Implant Radiographic Imaging: A Structured Qualitative Synthesis of Performance Across Imaging Modalities and AI Architectures.","authors":"M Jeevitha, Pachipulusu Balaji, B T Kavya, K S Rajesh, G S Keerthana","doi":"10.11607/jomi.11913","DOIUrl":"https://doi.org/10.11607/jomi.11913","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate contemporary evidence on artificial intelligence (AI) applied to radiographic imaging for pre-implant dental assessment and treatment planning, with emphasis on the distinction between technical algorithmic performance and clinically oriented planning outcomes.</p><p><strong>Materials and methods: </strong>Peer-reviewed original studies published from January 2021 through December 2025 were identified through PubMed/MEDLINE, the Cochrane Library, ScienceDirect, JSTOR, and supplementary searches. Eligible studies used radiographic imaging as an integral input to AI for pre-implant assessment, planning, decision support, virtual positioning, or outcome prediction. Reporting completeness was assessed with CLAIM 2024. Risk of bias was assessed with QUADAS-3 for eligible diagnostic/test-accuracy studies, PROBAST+AI for the prognostic prediction-model study, and RoB 2 for the randomized clinical study. Owing to heterogeneity, findings were synthesized qualitatively.</p><p><strong>Results: </strong>Thirty-six studies were included. CBCT was the predominant modality. Applications included anatomical detection and segmentation, bone assessment, decision support, implant-position prediction, automated virtual placement, workflow integration, and preoperative outcome prediction. Segmentation and anatomical-analysis studies generally reported high task-specific performance, while clinically oriented positional accuracy and planning outcomes were more variable. AI frequently reduced workflow time. QUADAS-3 was applicable to five studies; four had high overall risk of bias and one unclear risk. The prognostic prediction-model and randomized clinical studies also had high risk of bias under their respective tools.</p><p><strong>Conclusions: </strong>AI shows greatest current support for anatomical analysis and selected workflow tasks. Evidence for autonomous implant positioning and outcome prediction remains limited and heterogeneous. Current findings support clinician-supervised integration, with further multicenter external testing, standardized clinically meaningful outcomes, reproducibility, and prospective evaluation required before broader routine implementation.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-25"},"PeriodicalIF":1.7,"publicationDate":"2026-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149225669","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":"Marginal Bone Loss around Cement-Retained versus Screw‑Retained Single Implant-Supported Crowns: A Systematic Review and Meta‑Analysis of Randomized Clinical Trials.","authors":"Reza Tabrizi, Elaheh Biabanaki, Kaveh Seyedan, Mahsa Davarpanah, Zahra Nematollahi, Hooman Khanzadeh","doi":"10.11607/jomi.11918","DOIUrl":"https://doi.org/10.11607/jomi.11918","url":null,"abstract":"<p><strong>Purpose: </strong>This systematic review and meta-analysis compared marginal bone loss around cement-retained versus screw-retained single implant-supported crowns in partially edentulous patients.</p><p><strong>Materials and methods: </strong>A systematic search was conducted in PubMed, Scopus, Google Scholar, and the Cochrane Library to identify randomized controlled clinical trials published in English from 2015 onward. Eligible studies compared cement-retained and screw-retained single implant-supported crowns and reported marginal bone loss after a minimum follow-up of 12 months. Study selection, data extraction, risk-of-bias assessment (Cochrane RoB 2), and certainty assessment (GRADE) were performed independently by two reviewers. Aggregate study-level data were synthesized using a random-effects meta-analysis with Hartung-Knapp adjustment.</p><p><strong>Results: </strong>Eight randomized clinical trials were included, comprising 154 cement-retained and 166 screw-retained restorations. The study-level random-effects meta-analysis showed no statistically significant overall difference in marginal bone loss between retention methods (MD = -0.17 mm; 95% CI, -0.36 to 0.03; P = 0.079). Substantial between-study heterogeneity was observed (I² = 86.2%; τ² = 0.043), and the 95% prediction interval ranged from -0.70 to 0.37 mm.</p><p><strong>Conclusions: </strong>The study-level random-effects meta-analysis did not demonstrate a statistically significant difference in marginal bone loss between cement-retained and screw-retained restorations. Both retention methods can achieve satisfactory marginal bone stability across the available follow-up periods when appropriate clinical protocols are followed.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-29"},"PeriodicalIF":1.7,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149121399","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":"Rehabilitation Of Atrophic Maxilla With Immediate Loading And Long Trans-Sinus Implants: 5 Year Prospective Case Series.","authors":"Alexandre M Carvalho, Liliane Pacheco Carvalho, Laura F Carvalho, Thamyres Vitor Silva, Vinicius Carvalho Conceição, Ernesto B Benalcázar-Jalkh, Elisa Souza Fermino, Yu-Chi Cheng, Estevam A Bonfante","doi":"10.11607/jomi.11638","DOIUrl":"https://doi.org/10.11607/jomi.11638","url":null,"abstract":"<p><strong>Purpose: </strong>This prospective clinical case series evaluated the 5-year success of a bone anchorage technique using long trans-sinus implants for the rehabilitation of atrophic maxilla.</p><p><strong>Materials and methods: </strong>Twenty patients were treated according to the all-on-four concept, receiving 45 standard implants and 35 long implants (18-24 mm) placed through the maxillary sinus. All patients were rehabilitated with metal-acrylic resin fixed complete prostheses. Prosthesis survival was defined as the presence of the prosthesis, with or without modifications. Follow-ups were conducted every 6 months, including hygiene instruction, prosthesis polishing, and clinical evaluation for suppuration, sinus pathology, peri-implantitis, gingival bleeding, pain, bleeding on probing, or implant mobility.</p><p><strong>Results: </strong>At the 5-year follow-up, clinical and radiographic examinations revealed no cases of sinus pathology or suppuration. All implants remained osseointegrated and functional, with a success rate of 100% (95% CI: 100-100%). Prosthesis survival was also 100% (95% CI: 100-100%), while prosthesis success was 48.1% (95% CI: 28.7-65.2%) after 5 years.</p><p><strong>Conclusion: </strong>The use of long trans-sinus implants for immediate loading demonstrated predictable long-term outcomes, with excellent implant survival and high prosthesis survival.</p><p><strong>Clinical relevance: </strong>This technique may provide clinicians with a reliable treatment option for rehabilitating atrophic maxillae, potentially reducing the need for grafting procedures while ensuring long-term functional stability.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-21"},"PeriodicalIF":1.7,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149121315","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":"In Vitro Fit Accuracy of Conical Connection Implant System Components - Part 2: Vertical Fit.","authors":"Charles Beng Kai Tan, Ming Yi Tan, Yoong Liang See Toh, Janice Zhi Hui Tan, Keson Beng Choon Tan","doi":"10.11607/jomi.11912","DOIUrl":"https://doi.org/10.11607/jomi.11912","url":null,"abstract":"<p><strong>Purpose: </strong>This in vitro study evaluated the vertical fit accuracy of six conical connection implant systems and investigated the effect of varying tightening torque levels at four implant component connections.</p><p><strong>Materials and methods: </strong>Six implant systems were tested at four component connections: implant-impression coping (I-C), replica-impression coping (R-C), replica- abutment (R-A), and implant-abutment (I-A). Ten implants (I), replicas (R), open-tray impression copings (C), and abutments (A) from each system were randomly selected for testing. Torque levels of 5, 10, and 15 Ncm were applied to I-C, R-C, and R-A connections, while manufacturer-specified torque values were used for I-A. Changes in upper component (C / A) nominal height (ΔNH for I-C, R-C, R-A; ΔNHA for I-A) were measured using a coordinate measuring machine and represented vertical fit. Data was analysed using mixed analysis of variance (ANOVA) to evaluate the effects of implant system and torque magnitude on vertical fit, which was quantified by ΔNH or ΔNHA (α = 0.05).</p><p><strong>Results: </strong>Significant effects of torque magnitude, implant system, and their interaction on vertical displacement were observed for all component connections (P < 0.001). For I-C, R-C, and R-A, increasing torque from 5 to 10 and 15 Ncm generally resulted in decreased upper component nominal height. Mean ΔNH ranged from -0.3 ± 0.5 µm (CON, ΔNH10) to -13.9 ± 2.6 μm (ANT, ΔNH15) for I-C; from -0.3 ± 0.5 µm (CON, ΔNH10) to -25.9 ± 6.0 µm (ANT, ΔNH15) for R-C; and from -2.5 ± 1.6 µm (MEG, ΔNH10) to -33.9 ± 3.3 µm (CON, ΔNH15) for R-A. Mean ΔNHA ranged from -21.8 ± 9.7 μm (DEN, ΔNHA5) to 76.4 ± 25.4 μm (CON, ΔNHA15). ΔNHA was consistently positive for CON, MEG, and OSS, consistently negative for DEN and STR, and torque dependent for ANT.</p><p><strong>Conclusion: </strong>Vertical fit accuracy of conical connection implant components is influenced by implant system, component connection, and torque magnitude, with system-specific differences. No single tightening torque can consistently reproduce abutment nominal heights between replica-abutment and implant-abutment interfaces across all implant systems.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-21"},"PeriodicalIF":1.7,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149121410","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":"Surgical Efficiency, Learning Dynamics, and Positional Accuracy of Freehand Immediate Implant Placement Under Standardized Digital Planning: An In Vitro Study.","authors":"Claudia Lorenzi, Alessandro Pinto, Abdusalam Alrmali, Andrea Laureti, Hom-Lay Wang, Paolo Carosi","doi":"10.11607/jomi.11902","DOIUrl":"10.11607/jomi.11902","url":null,"abstract":"<p><strong>Purpose: </strong>To characterize surgical efficiency and within-operator learning dynamics during freehand immediate post-extraction implant placement performed under standardized, prosthetically driven digital planning, and to describe the positional accuracy achieved across operators of differing experience in a 3D-printed phantom model.</p><p><strong>Materials and methods: </strong>In a prospective in vitro study, 80 tissue-level implants (TLC/TLX; Institut Straumann AG) were placed by three operators stratified by cumulative experience (0; <30; >100 implants) at ten anterior maxillary sites on standardized 3D-printed extraction-socket phantoms. All sites were planned in coDiagnostix and prepared with an identical drill sequence; implant type was disclosed only after osteotomy completion. Site and implant allocation were randomized using permuted blocks, and a blinded examiner performed all digital superimposition. The primary outcome was angular deviation; secondary outcomes were 3D offset at the implant base and apex and total procedure time. Between-operator comparisons used the Kruskal-Wallis test and Bonferroni-corrected Mann-Whitney U tests; within-operator learning was evaluated by regression of outcomes against sequential case order.</p><p><strong>Results: </strong>Seventy-six implants were evaluable. Positional accuracy did not differ between operators for any metric after correction (angular deviation: Novice 7.14°, Intermediate 9.36°, Expert 7.11°; Kruskal-Wallis P = 0.086; 3D offset at base P = 0.154; at apex P = 0.710), and all values fell within published freehand benchmark ranges. Total procedure time differed across operators (Expert 3.71 ± 1.49, Intermediate 4.96 ± 1.50, Novice 6.40 ± 2.83 minutes; P < 0.001), and all three operators showed a significant reduction in procedure time across sequential cases (P = 0.036, P < 0.001, and P = 0.008). Procedure time was not associated with any accuracy metric (Spearman ρ = -0.114 to 0.005; all P > 0.30). Overall, TLC and TLX did not differ in positional accuracy (all P ≥ 0.340).</p><p><strong>Conclusions: </strong>Under standardized prosthetically driven planning, positional accuracy did not differ significantly across operators and fell within established freehand benchmark ranges, whereas procedure time and within-operator efficiency gains were the principal differentiators. Because each experience level comprised a single operator, comparisons are operator-level and do not support experience-based generalization.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-23"},"PeriodicalIF":1.7,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149121389","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":"Implant Survival Rate in Grafted Cleft Defects in Patients with Cleft Lip and Palate: A Systematic Review.","authors":"Sofiya Galina, Agathe Louisy, Julie Longis, Sophie Dugast, Pierre Corre, Anne-Gaëlle Chaux","doi":"10.11607/jomi.11863","DOIUrl":"https://doi.org/10.11607/jomi.11863","url":null,"abstract":"<p><strong>Purpose: </strong>The aim of this systematic review was to assess dental implant survival in grafted cleft defects in subjects with cleft lip, alveolus and/or palate (CLAP).</p><p><strong>Materials and methods: </strong>An electronic search of PubMed, ScienceDirect, Cochrane, and Scopus databases was conducted. From the 1,606 studies initially identified, 30 (1.87%) met the inclusion criteria. Studies were included if they reported on dental implants placed in patients with CLAP (grafted or not), evaluated implant survival rate, and indicated the time interval in which implant failure occurred. Case reports, reviews, animal studies, and studies with fewer than 10 implants or lacking survival data were excluded.</p><p><strong>Results: </strong>30 studies were included, comprising six prospective and 24 retrospective designs. Overall, 742 subjects (mean age 27.9 years) received 1,411 implants with a mean follow-up of 52 months. The implant survival rate was 95% at 6 months and 90.3% at 5 years, which was lower than in the noncleft population. Based on the available data, we did not observe a clear difference in the average time to failure between subjects with CLAP and those from noncleft populations. An association between the type of cleft and the implant survival rate as well as specific potential failure factors could not be identified due to a lack of available data in the relevant studies.</p><p><strong>Conclusions: </strong>Although lower than in the noncleft population, implant survival rates in patients with CLAP sequelae are sufficiently reliable to consider this treatment option a viable part of their oral rehabilitation. Tertiary bone grafting appears crucial for the long-term implant survival and should be performed either 3-6 months before implant placement or simultaneously. These conclusions should, however, be interpreted cautiously given the substantial heterogeneity, incomplete reporting, and limited long‑term follow‑up in the existing literature. A well-designed prospective clinical study is necessary to achieve comparable long-term results and to investigate potential failure factors, which are currently difficult to determine.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-36"},"PeriodicalIF":1.7,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149121391","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":"Biomechanical Interaction Between Endosseous and Patient-Specific Subperiosteal Implants in Full-Arch Rehabilitation of the Atrophic Maxilla: A Finite Element Analysis.","authors":"Sabir Majidov, Zeynep Afra Akbiyik Az, Mustafa Ayhan, Alp Saruhanoglu","doi":"10.11607/jomi.11988","DOIUrl":"https://doi.org/10.11607/jomi.11988","url":null,"abstract":"<p><strong>Purpose: </strong>To compare the biomechanical behavior of a hybrid maxillary full-arch reconstruction supported by conventional endosseous implants and a patient-specific subperiosteal implant with a reconstruction supported by bilateral patient-specific subperiosteal implants.</p><p><strong>Materials and methods: </strong>Three-dimensional finite element models of a severely atrophic maxilla were constructed from computed tomography data. Two full-arch prosthetic configurations were analyzed: a hybrid model (three endosseous implants on one side and a patient-specific subperiosteal implant on the contralateral side) and a bilateral model (bilateral subperiosteal implants). Three static loading conditions were simulated: bilateral posterior vertical (900 N), unilateral posterior oblique (300 N), and bilateral anterior vertical (600 N). Maximum principal stress in bone, von Mises stress in metallic components (implant frameworks, conventional implants, and fixation screws), and total prosthetic displacement were assessed using nonlinear static analysis.</p><p><strong>Results: </strong>Global peak values of stress and displacement were slightly higher in the bilateral subperiosteal model across all loading scenarios. Maximum principal stress in maxillary bone ranged from 6.777 to 16.687 MPa in the hybrid configuration and from 7.255 to 17.674 MPa in the bilateral configuration. Peak von Mises stress in the implant systems reached 140.076 MPa in the hybrid model (concentrated in the subperiosteal framework) and 146.170 MPa in the bilateral model, whereas the maximum stress in endosseous implants was 57.88 MPa. Prosthetic displacement ranged from 0.01598 to 0.10110 mm in the hybrid model and from 0.01611 to 0.10360 mm in the bilateral model. Despite comparable global peaks, the hybrid configuration exhibited an asymmetric spatial distribution, with stress and displacement concentrating predominantly on the subperiosteal implant-supported side.</p><p><strong>Conclusions: </strong>Splinting conventional endosseous and patient-specific subperiosteal implants within a single maxillary full-arch prosthesis did not increase global peak stresses or prosthetic displacement compared to bilateral subperiosteal reconstruction under the simulated conditions. However, the hybrid configuration induced a more asymmetric cross-arch biomechanical response under the simulated conditions.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-26"},"PeriodicalIF":1.7,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149121345","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":"Effect of Low-Level Laser Therapy on Stability of Dental Implants in D3 and D4 Bone Quality: A Split-Mouth Randomized Controlled Clinical Trial.","authors":"Omer Ali Hama, Suha Nafea Aloosi","doi":"10.11607/jomi.11943","DOIUrl":"10.11607/jomi.11943","url":null,"abstract":"<p><strong>Purpose: </strong>Achieving predictable implant stability in low-density maxillary bone (D3-D4) remains clinically challenging because reduced bone density is associated with greater early loss of stability and an increased risk of implant failure. Photobiomodulation (PBM) has been proposed to enhance osseointegration; however, clinical evidence regarding its effect on implant stability in low-density bone remains limited and inconsistent. The aim of this study is to evaluate the effect of 940-nm diode laser photobiomodulation (PBM) on implant stability during early healing in low-density maxillary bone (D3-D4).</p><p><strong>Materials and methods: </strong>This split-mouth, randomized controlled clinical trial included medically healthy adults who required bilateral maxillary implants. A total of 40 implants were placed in 10 participants using a guided flapless protocol. Test sites received 940-nm diode laser PBM immediately after implant placement and at 2-week intervals for 2 months, while contralateral sites served as controls. Implant stability was measured using resonance frequency analysis and expressed as implant stability quotient (ISQ) at baseline (T0), 2 months (T1), and 3 months (T2). Data was analyzed using linear mixed-effects model as primary analysis and two-way repeated-measures analysis of variance as supportive.</p><p><strong>Results: </strong>In the primary mixed-effects analysis, implant stability did not differ significantly between the PBM and control groups at baseline (estimated mean difference [PBM control], -2.45 ISQ; P = 0.341). At 2 months, PBM-treated implants demonstrated significantly higher estimated stability than control implants (mean difference, 6.30 ISQ; 95% CI, 1.21-11.39; P = 0.016). At 3 months, no significant between-group difference was observed (mean difference, 0.40 ISQ; P = 0.878). The linear mixed-effects model demonstrated a significant time × treatment interaction (P = 0.042), indicating that implant-stability trajectories differed between the groups over time. The complete-case repeated-measures ANOVA yielded a consistent significant time × treatment interaction (P = 0.007). No adverse effects related to PBM were observed.</p><p><strong>Conclusions: </strong>Photobiomodulation using a 940-nm diode laser enhanced early implant stability and reduced the magnitude of the stability dip in D3-D4 maxillary bone without affecting final implant stability after 3 months. PBM may represent a safe adjunctive approach to support early osseointegration in low-density bone.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-34"},"PeriodicalIF":1.7,"publicationDate":"2026-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149121383","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}