The International journal of oral & maxillofacial implants最新文献

{"title":"The Orofacial Somatosensory Changes of Edentulous Mandible After Full Arch Implant Surgery-A Six-Month Follow Up.","authors":"Guangju Yang, Qianqian Zhang, Qian Ding, Xiaoxiang Xu, Lei Zhang","doi":"10.11607/jomi.11432","DOIUrl":"https://doi.org/10.11607/jomi.11432","url":null,"abstract":"<p><strong>Aims: </strong>To evaluate somatosensory function changes and recovery time in patients with mandibular edentulous jaw after full arch flap implant surgery using a standardized quantitative sensory testing (QST) protocol.</p><p><strong>Materials and methods: </strong>Fourteen patients with edentulous mandibles underwent full-arch alveolar flap implant surgery, with three to four implants placed in each case. A QST battery including cold detection threshold (CDT), warmth detection threshold (WDT), thermal sensory limen (TSL), paradoxical heat sensation (PHS), cold pain threshold (CPT), heat pain threshold (HPT), mechanical detection threshold (MDT), mechanical pain threshold (MPT), wind-up ratio (WUR), vibration detection threshold (VDT), and pressure pain threshold (PPT) was performed at skin of mental region and keratinized gingiva of right canine. The QST was performed before surgery and one, three, six months after surgery. The QST data was calculated following the lasted guideline.</p><p><strong>Results: </strong>The WUR of 3 months after surgery was higher than that before surgery and one month after surgery (WUR 3 mon = 3.81 ± 2.54, WUR before surgery = 2.19 ± 1.34, WUR 1 mon = 1.85 ± 1.27, P ≤ 0.032). The CDT of one month after surgery was lower than that before surgery and three, six months after surgery (CDT 1 mon = -1.57 ± 0.70 ℃, CDT before surgery = -1.01 ± 0.45 ℃, CDT 3 mon = -1.12 ± 0.50 ℃, CDT 6 mon = -1.04 ± 0.42 ℃, P ≤ 0.029). Z-score transformation was performed for each QST variable with the data before surgery as baseline mean and SD. In both mucosal and mental regions, the percentage of Z-scores below -1.96 and Z-scores above 1.96 before surgery and 6 months after surgery, was lower than 5%, while the Z-scores below -1.96 in 1 month after surgery was 6.36% and 7.79% respectively in mucosal and mental region, the Z-scores below -1.96 in 3 months after surgery was 6.36% and 7.14% respectively in mucosal and mental region.</p><p><strong>Conclusion: </strong>Somatosensory abnormalities were detected in edentulous mandible patients after full arch flap implant surgery evaluated by a comprehensive QST battery even with no subjective symptom, and somatosensory function recovered after 6 months.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-35"},"PeriodicalIF":1.7,"publicationDate":"2025-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145002364","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":"Clinical Outcome of One Step Implant Therapy in Severely Atrophic Posterior Maxilla: A 4-16 Year Retrospective Study.","authors":"Tony Shing-Zeng Dung, Jui Wang, Yung-Ting Hsu, Tzu-Hsuan Weng, Shale M Ninneman, Yu-Kang Tu","doi":"10.11607/jomi.11348","DOIUrl":"https://doi.org/10.11607/jomi.11348","url":null,"abstract":"<p><strong>Purpose: </strong>This long-term retrospective case series study aimed to evaluate the efficacy and to identify risk factors for peri-implantitis associated with the one-step lateral sinus floor elevation (LSFE) procedure in patients with a severely atrophic posterior maxilla.</p><p><strong>Materials and methods: </strong>Clinical data were obtained from Periodontic Department at Taipei Tzu Chi Hospital. One-step, non-submerged LSFE enabled simultaneous implant placement in sites with residual bone height < 5 mm. In total, 54 patients and 65 sinuses received 107 implants to support fixed reconstructions over a period of 4-16 years. Healing abutments were simultaneously placed at the time of fixture placement. Clinical and radiographic outcomes were assessed, including marginal bone loss (MBL) and implant survival rate. Information on implants and patients was recorded. Univariable and multivariate analyses were performed through the generalized estimating equation method to assess possible patient- and implant-related risk factors for MBL and peri-implantitis.</p><p><strong>Results: </strong>The overall implant survival were 97.2%. Twenty-nine implants (27%) had MBL > 0.5 mm. A history of periodontitis was not significantly associated with MBL (p > .05). Patients with poor oral hygiene (p < .001), diabetes (p = .010), or width of keratinized mucosa < 2 mm (p = .011) were identified as potential risk factors for peri-implantitis.</p><p><strong>Conclusion: </strong>This study demonstrates that with careful case selection and adherence to proper implant protocols, one-step implant placement in severely atrophic maxillary sinuses using the LSFE is predictable and can be maintained long-term.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-37"},"PeriodicalIF":1.7,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144984543","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":"Comparison Between Computer-Assisted and Free-Hand Dental Implant Placement: A Systematic Review and Meta-analysis.","authors":"Mohammadjavad Shirani, Maryam Emami","doi":"10.11607/jomi.11349","DOIUrl":"https://doi.org/10.11607/jomi.11349","url":null,"abstract":"<p><strong>Purpose: </strong>This systematic review and meta-analysis aimed to compare computer-assisted implant surgery (CAIS) and free-hand implant placement (FHIP) in terms of clinical and radiographic outcomes.</p><p><strong>Methods: </strong>A comprehensive search of five databases, hand-searching, and cross-referencing identified randomized controlled trials (RCTs) comparing CAIS and FHIP published up to November 2024. Outcomes included marginal bone loss (MBL), implant survival rate, patient satisfaction, pink esthetic scores, probing depth, and complications. The Cochrane risk-of-bias tool and GRADE approach were used to assess study quality and evidence certainty. Meta-analysis and sensitivity/subgroup analyses were conducted.</p><p><strong>Results: </strong>Twelve publications from 9 RCTs (395 participants, 1,242 implants) were included. Although overall differences in MBL and implant survival were not statistically significant, subgroup analyses revealed several significant findings. CAIS demonstrated significantly reduced MBL in fresh socket placements (P=0.04), higher patient satisfaction (P=0.03), and improved pink esthetic scores (P=0.009). FHIP was associated with fewer biological complications (P=0.04) and lower MBL when compared to tissue-supported CAIS (P=0.03). Sensitivity analyses confirmed robustness for most outcomes, though evidence quality ranged from very low to moderate, and six studies showed high risk of bias.</p><p><strong>Conclusion: </strong>Considering the limitations related to the quality of the included studies, both CAIS and FHIP achieved high survival rates (>98%). CAIS showed advantages in fresh socket cases and esthetic/patient-reported outcomes, while FHIP had fewer biological complications and better outcomes when using an open flap approach.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-26"},"PeriodicalIF":1.7,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144984564","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":"Radiographic Outcomes Comparing Mini-Implant Versus Conventional Implant-Retained Overdenture with Different Attachment Systems: A Randomized Controlled Clinical Trial.","authors":"Yousra Ahmed, Marwa Gamal Mahmoud Taha, Heba Elbelacy, Mona Samir Gaber, Gustavo Vicentis Oliveira Fernandes, Mohamed Rahhal","doi":"10.11607/jomi.11506","DOIUrl":"https://doi.org/10.11607/jomi.11506","url":null,"abstract":"<p><strong>Purpose: </strong>This randomized controlled clinical trial aimed to evaluate and compare the radiographic outcomes of mandibular overdentures retained by mini-implants versus conventional implants utilizing different attachment systems.</p><p><strong>Materials and methods: </strong>Twenty-one completely edentulous patients (aged 60-70 years) dissatisfied with conventional mandibular dentures were randomly and equally assigned into three groups. Group I received overdentures retained by four mini-implants (2.4 mm diameter, 13 mm length) placed in the interforaminal region; Group II received two conventional implants (3.7 mm diameter, 12 Any blinded information will be available then. mm length) with locator attachments bilaterally at the canine sites; and Group III received two conventional implants with ball-and-socket attachments in the same region. Cone-beam computed tomography (CBCT) was used to assess peri-implant marginal bone levels at baseline, 6 months, and 12 months post-insertion. Data were analyzed using non-parametric tests with a significance level set at p≤0.05.</p><p><strong>Results: </strong>All groups demonstrated progressive bone loss over time. Group I exhibited the highest cumulative bone resorption (0.81±0.11 mm), significantly greater than Group II (0.41±0.16 mm) and Group III (0.45±0.21 mm) at 12 months (p=0.002). No significant differences were observed between Groups II and III.</p><p><strong>Conclusion: </strong>While all attachment systems maintained the bone levels within acceptable clinical limits, mini-implants were associated with greater marginal bone loss. Locator attachments on conventional implants exhibited the most favorable radiographic outcomes.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-21"},"PeriodicalIF":1.7,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144984589","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":"Incidence of Complications in Immediate Loading Conometric vs. Screw-Retained Full-Arch Prostheses: Retrospective Study on 1356 Implants.","authors":"Leonello Biscaro, Luigi Canullo, Oriana Spanu, Arianna Zuffanti, Paolo Pesce, Maria Menini","doi":"10.11607/jomi.11316","DOIUrl":"https://doi.org/10.11607/jomi.11316","url":null,"abstract":"<p><strong>Introduction: </strong>The purpose of the present retrospective study was to analyze the clinical outcomes of immediate loading complete rehabilitations with screw-retained or conometric implant prosthesis.</p><p><strong>Materials and methods: </strong>203 patients treated with complete immediate-loading prostheses were evaluated with a total of 1356 implants supporting 261 fixed prostheses: 65 with conometric retention and 196 with screw-retention. Implant survival, prosthesis success rate, technical and biological complications were evaluated. Chi-square test was carried out to evaluate possible statistically significant differences between the two implant prosthesis types.</p><p><strong>Results: </strong>During the follow-up period (mean: 28.5 months; range: 12-80 months) 27 implants failed (2%) and global prosthetic success rate was 89.3%. No statistically significant differences were found in implant survival and prosthesis success between the two groups. Screw loosening was the most frequent complication (4.2% of cases) followed by chipping/fracture of the veneering material. Prosthesis loss of retention (detachment) occurred in 9.2% of the conometric prostheses.</p><p><strong>Conclusions: </strong>Both conometric and screw-retained complete immediate loading rehabilitations presented high prosthesis success rate and low incidence of complications, with the most frequent complication being screw loosening. Conometric prostheses showed a significant greater incidence of prosthesis detachment.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-27"},"PeriodicalIF":1.7,"publicationDate":"2025-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144984591","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":"Accuracy of Implant Placement with Robotic Surgery, Dynamic Navigation, Fully Static Guide, and Freehand Surgery: A Systematic Review and Network Meta-analysis.","authors":"Xin-Yu Wu, Zhuo-Li Huang, Bei-Lei Liu, Xiao-Lei Lv, Jun-Yu Shi, Hong-Chang Lai","doi":"10.11607/jomi.11531","DOIUrl":"https://doi.org/10.11607/jomi.11531","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the relative efficacy and estimate a treatment ranking of the positional accuracy of guided implant placement, including robotic surgery, dynamic navigation, static guide, and freehand surgery.</p><p><strong>Materials and methods: </strong>Electronic searches were performed in PubMed, Embase, and Cochrane CENTRAL. Randomized controlled trials comparing different guided approaches were included. The primary outcome was positional accuracy. Risks of bias assessment, network meta-analysis, subgroup analysis, and quality of evidence assessment were performed.</p><p><strong>Results: </strong>A total of 21 studies (956 participants and 1632 implants) were included. Robotic surgery, static guide, and dynamic navigation showed significantly less platform deviation (mean difference [95% confidence interval]: -0.67 [- 0.86; -0.48] mm, -0.65 [-0.74; -0.56] mm, -0.60 [-0.70; -0.50] mm), apex (-1.35 [-1.70; -0.99] mm, -0.93 [-1.09; -0.76] mm, -0.90 [-1.09; -0.71] mm), and angular deviation (-5.29 [-6.78; -3.79]°, -4.09 [-4.74; -3.45]°, -3.69 [-4.48; -2.90]°) compared with freehand surgery. Robotic surgery was the best candidate to achieve high positional accuracy, followed by static guide and dynamic navigation. Robotic surgery showed significantly higher apex accuracy compared with static guide and dynamic navigation.</p><p><strong>Conclusions: </strong>Within the limitation of the study, robotic surgery achieves higher positional accuracy. All three guided approaches have great potential in dental implant surgery.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-28"},"PeriodicalIF":1.7,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144857280","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":"Mathematical and Computational Models for Osseointegration in Titanium Dental Implants: A Systematic Review of Current Approaches and Future Directions.","authors":"Tomás Gandía, María Prados-Privado","doi":"10.11607/jomi.11460","DOIUrl":"https://doi.org/10.11607/jomi.11460","url":null,"abstract":"<p><strong>Purpose: </strong>To identify, compare, and critically evaluate the main mathematical and computational models used to study osseointegration in titanium dental implants. It focuses on the models' predictive accuracy, biological and mechanical integration, and clinical relevance, highlighting their contributions and limitations in simulating implant stability and bone remodeling.</p><p><strong>Materials and methods: </strong>A systematic literature search was conducted in MEDLINE/PubMed, Scopus, and SpringerLink databases up to February 2025. Studies were included if they employed mathematical or computational models-such as finite element analysis, mechanobiological frameworks, or reaction-diffusion systems-to investigate osseointegration in titanium dental implants. A quality assessment of included studies was performed using the GRADE approach to ensure methodological rigor.</p><p><strong>Results: </strong>A total of 42 studies met the inclusion criteria. Finite element analysis (FEA) was the most commonly used technique, primarily addressing mechanical aspects such as stress distribution and implant geometry. Mechanobiological and reaction-diffusion models incorporated biological and biochemical processes but lacked standardization and clinical validation. The integration of mechanical and biological factors remains limited, hindering real-world applicability. Despite progress, few models included patient-specific parameters or were validated experimentally.</p><p><strong>Conclusion: </strong>Mathematical and computational models have substantially advanced our understanding of osseointegration in titanium dental implants. However, their translation into clinical practice is still constrained by validation gaps, heterogeneity in model parameters, and limited biological integration. Future research should emphasize hybrid models, incorporate robust validation protocols, and leverage artificial intelligence to enable personalized and clinically meaningful simulations.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-47"},"PeriodicalIF":1.7,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144857225","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 Autogenous Blood and Advanced Platelet-rich Fibrin on New Bone Formation in Supported Sinus Floor Elevation by Resorbable Membrane and Ultrasonic-activated Pin System: A Controlled Experimental Study.","authors":"İbrahim Macit, Burcu Sengüven Toközlü, Mehmet Zahit Adışen, Sara Samur Ergüven, İsmail Doruk Koçyigit, Umut Tekin","doi":"10.11607/jomi.11391","DOIUrl":"https://doi.org/10.11607/jomi.11391","url":null,"abstract":"<p><strong>Purpose: </strong>It is well known that the success of dental implants is directly related to bone quantity and quality. This experimental animal study aimed to evaluate the histological and radiological effects of autogenous blood (AB), advanced platelet-rich fibrin (A-PRF) and non-grafted following supported sinus floor elevation by resorbable membrane and ultrasonic-activated pin system.</p><p><strong>Materials and methods: </strong>Twenty one sinus floor lifting procedures were performed in eleven New Zealand rabbits that were divided into three groups. Each group planned to include seven maxillary sinus regions. Resorbable membrane and ultrasonic-activated pins (SonicWeld Rx®, KLS Martin) were used to support the elevated sinus floor in all groups. After the elevation of the sinus floor, bone defects were supported with autogenous blood (Group 1), with A-PRF in (Group 2) and without using any material in the control group (Group 3). The rabbits were sacrificed at 8 weeks after surgery. Specimens obtained from the upper and lower regions. Radiographic and histologic examinations were performed on all samples. The radiologic examination was performed on new bone formation based on density difference (Grayscale/GS) in axial, coronal and sagittal planes on CBCT sections. Histologic evaluation was performed by analyzing new bone tissue percentage/score, inflammation and fibrous tissue parameters.</p><p><strong>Results: </strong>In radiologic evaluation, the differences in GS values obtained in Group 3 in all planes were significantly lower than in Group 1 and Group 2, indicating significantly higher bone formation (p<0.05). In histologic evaluation, the percentage and score of newly formed bone were higher for Group 3; however, that difference was significant between Group 3 and Group 1 for the specimens taken from the upper regions (p=0.005 and p=0.018, respectively). Fibrous tissue formation was lower in Group 3; the difference was significant between Group 3 and Group 1 for the specimens taken from the upper regions (p=0.037). Inflammation values were similar between the groups.</p><p><strong>Conclusions: </strong>New bone formation after sinus floor elevation without using graft material has been associated with more successful outcomes than the group using AB and A-PRF in terms of histological and radiographical parameters.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-23"},"PeriodicalIF":1.7,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144857224","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":"Evaluation of the Effects of Hybrid Prostheses Prepared from Different Materials on Pterygoid and Cancellous - Anchored Posterior Maxillary Implants of Varying Lengths Using Three - Dimensional Finite Element Analysis.","authors":"Kuddusi Akbulut, Alper Caglar","doi":"10.11607/jomi.11447","DOIUrl":"10.11607/jomi.11447","url":null,"abstract":"<p><strong>Introduction: </strong>The treatment of atrophic edentulous maxilla with implants becomes complex due to issues such as poor bone quality in the posterior region, insufficient bone volume, and anatomical constraints of the maxillary sinus. Rehabilitation using dental implants placed in the pterygomaxillary region posteriorly and between the maxillary sinuses anteriorly allows overcoming these limitations.</p><p><strong>Purpose: </strong>The aim of this study is to investigate the stresses generated in the bone, implant, substructure materials, and aesthetic materials of hybrid prostheses prepared from three different substructure materials placed at different lengths in the pterygomaxillary region of completely edentulous maxillae using three-dimensional finite element analysis (FEA).</p><p><strong>Material and methods: </strong>Implants of two different lengths, 11.5 mm and 18.0 mm, were placed in the pterygomaxillary region. The 18.0 mm long implant has bicortical anchorage. Hybrid prostheses were prepared using three different substructure materials: PEEK, Ti, and Zr. A force of 150 N was applied unilaterally at an angle of 30 degrees from the palatal direction to the buccal side.</p><p><strong>Results: </strong>Models with PEEK substructures exhibited greater displacement and shear stress values compared to those with Ti and Zr substructures. An increase in Von Mises stresses was observed in the apical region of the 18 mm long dental implants where cortical anchorage was achieved. In cortical bone, higher Pmax and Pmin values were noted in certain areas of the models with PEEK substructures.</p><p><strong>Conclusion: </strong>Different substructure materials have varying effects on the prosthesis, bone, and implant. It is suggested that the use of substructure materials with high elastic modulus would be more appropriate to reduce potential prosthetic complications in hybrid prostheses and achieve predictable stress distribution in the bone. The use of maxilla-restricted dental implants should be considered when sufficient cortical bone anchorage is present around the neck region of the implants. However, in cases where cortical bone support in the neck region is insufficient, the use of implants providing bicortical anchorage may be more beneficial.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-31"},"PeriodicalIF":1.7,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144796592","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":"A Novel Eccentric Surgical Guide Strategy for Immediate Implant Placement: An In Vitro Study.","authors":"Minrun Luo, Zi'ang Cheng, Xiaotong Gao, Yuxi Zhu, Tao Wu, Yi Zhou","doi":"10.11607/jomi.11467","DOIUrl":"https://doi.org/10.11607/jomi.11467","url":null,"abstract":"<p><strong>Objectives: </strong>This study aims to evaluate the implantation accuracy of a novel eccentric surgical guide strategy for immediate implant placement (IIP).</p><p><strong>Materials and methods: </strong>Two hundred CBCTs were used to measure anatomical parameters, and the obtained data were used to create an anatomical extra-oral model for IIP. Eccentric guides are specialized guides that position the drills or implant eccentrically toward the high-density side. Thirty implants were placed into fifteen anatomical models utilizing three different computer-assisted static implant surgery (sCAIS) protocols: the conventional, the one-step, and the step-by-step methods. Postoperative CBCTs were superimposed on the preoperative virtual placement plan to assess 3D and 2D deviations at the implant entry and apex point.</p><p><strong>Results: </strong>The average angle between the model's inclined plane and the implant's central axis was 18.3°, ranging from 10° to 39°. The one-step eccentric method (Group B) had the smallest 3D deviation at the entry point (mean = 0.41 ± 0.14 mm), apex (mean = 0.68 ± 0.20 mm), and angular deviation (mean = 1.74 ± 0.68°). The 2D deviation analysis showed Group B had the lowest labial deviations at the entry (mean = 0.37 ± 0.16 mm) and apex (mean = 0.36 ± 0.29 mm). The step-by-step eccentric method (Group C) resulted in a considerable reduction in labial deviation at the apex (mean = 0.35 ± 0.39 mm).</p><p><strong>Conclusion: </strong>The novel eccentric surgical guide strategy increased implantation accuracy in IIP, particularly by lowering labio-palatal discrepancies.</p><p><strong>Clinical relevance: </strong>Implant position can be affected by the anatomical structure of the tooth extraction socket. Therefore, it is critical to find a novel eccentric surgical guide strategy to address labial deflection during implant site preparation for IIP.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-24"},"PeriodicalIF":1.7,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144796591","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}