The International journal of oral & maxillofacial implants最新文献

{"title":"On the Use of a Sticky Bone Substitute in the Presence of a Ruptured Sinus Membrane During Sinus Elevation Procedures: An Experimental Rabbit Study.","authors":"Zenzaburo Taniguchi, Marco Esposito, Samuel Porfirio Xavier, Erick Ricardo Silva, Daniele Botticelli, Jacopo Buti, Shunsuke Baba","doi":"10.11607/jomi.11011","DOIUrl":"10.11607/jomi.11011","url":null,"abstract":"<p><strong>Purpose: </strong>To assess the efficacy and safety of a sticky dual-phase porcine-derived bone substitute compared to a similar dual-phase xenogeneic non-adhesive bone graft in the presence of induced perforations of the sinus membrane during sinus elevation procedures in a split-mouth rabbit model.</p><p><strong>Materials and methods: </strong>Bilateral sinus floor elevations were performed in 12 rabbits. The sinus mucosa was intentionally perforated using a blade on both sides and randomly filled with either a corticocancellous bone embedded in a 20% thermosensitive gel (sticky bone test group [GTO]) or a corticocancellous bone and 10% collagen (control group [mp3]). Healing progress was evaluated after 2 and 10 weeks in 12 animals (6 in each group) with CBCT imaging, microcomputed tomography (microCT), and histologic assessments.</p><p><strong>Results: </strong>One animal of the 2-week group died but was substituted. No other complications were observed. At the 2-week time point, CBCTs revealed that biomaterial particles were observed in the vicinity of the sinus membrane in two out of six sinuses of each group but never dispersed into the sinus. MicroCT and histology consistently revealed few granules beyond the elevated region. Histologically, five sinuses in the mp3 group and two sinuses in the GTO group exhibited granules outside the elevated region but in the vicinity of the perforations. In the 10-week groups, the number of affected sinuses decreased to one in the mp3 group and two in the GTO group. Throughout all observations, the graft granules consistently resided proximate to the elevated region. MicroCT demonstrated a reduction in the volume of the elevated region by approximately 12% after 2 weeks and 50% to 54% after 10 weeks.</p><p><strong>Conclusions: </strong>The use of both sticky and non-sticky bone substitutes was observed to prevent a substantial amount of particles from extruding through an induced perforation of the sinus membrane. This suggests that it could be possible to use a sticky bone substitute as an alternative to a barrier membrane to avoid the extrusion of bone granules in the presence of accidental perforation of the sinus membrane in clinical practice. After 10 weeks of healing, the volume of the elevated region decreased by approximately 50%, possibly due to biomaterial resorption and loss through the surgically created perforation.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"417-426"},"PeriodicalIF":0.0,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142376498","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":"An Organic Mineral Adhesive Bone Graft: A Preclinical Study.","authors":"Joseph P Fiorellini, Sean Mojaver, George Kay, Yu Cheng Chang, Michael Brown, Hector Sarmiento","doi":"10.11607/jomi.11074","DOIUrl":"10.11607/jomi.11074","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate four formulations of tetracalcium phosphate combined with phosphoserine (TTCP-PS) in comparison to the conventional grafting materials bioglass (BG) and deproteinized cancellous bovine bone with a bioresorbable collagen membrane in standardized defects created in the angle of the rat mandible.</p><p><strong>Materials and methods: </strong>TTCP-PS is a synthetic, injectable, cohesive, self-setting, mineral-organic wet-field adhesive. Microcomputed tomography (microCT) and histomorphometry were used to evaluate bone replacement with each of these materials after in vivo residence of either 4 or 12 weeks.</p><p><strong>Results: </strong>Specific TTCP-PS formulations can form bone comparable to conventional materials in an osteopromotive mechanism but with the advantage of having cohesive and adhesive properties.</p><p><strong>Conclusions: </strong>This study showed the potential for TTCP-PS to be used as a viable candidate for bone grafting procedures.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"504-511"},"PeriodicalIF":0.0,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142376494","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":"Innovative 3D-Printed Titanium Specimens Favor a Modulation of Inflammation in Dental Pulp Stem Cells During Liposome-Triggered Mineralization.","authors":"Marialucia Gallorini, Alessia Ricci, Serena Pilato, Antonella Fontana, Carlo Mangano, Amelia Cataldi, Susi Zara","doi":"10.11607/jomi.11129","DOIUrl":"10.11607/jomi.11129","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate the interplay between inflammation and differentiation upon implantation, dental pulp stem cells (DPSCs) were cultured on 3D-printed titanium owning an internal open cell form, administering osteogenic factors by a liposomal formulation (LipoMix) compared to traditional delivery of differentiation medium (DM).</p><p><strong>Materials and methods: </strong>Osteogenic differentiation was evaluated via western blot by measuring β1 integrin expression and real-time reverse transcription-polymerase chain reaction (RT-PCR), as well as measuring SP7 and type 1 collagen gene expression. In addition, angiogenesis was characterized by measuring vascular endothelial growth factor (VEGF) secretion levels. Matrix mineralization was assessed by means of Alizarin red staining, cell adhesion, and inflammation responses through western blot, enzymatic, and enzyme-linked immunosorbent assays (ELISA) that evaluated Nrf2 expression, catalase activity, and prostaglandin E2 (PGE2) secretion, respectively.</p><p><strong>Results: </strong>LipoMix enhances cell proliferation and adhesion, as revealed by increased β1 integrin expression. Mineralized matrix deposition, SP7 gene expression, type 1 collagen release, and alkaline phosphatase activity appeared to increase in the LipoMix condition. Additionally, the redox-sensitive transcription factor Nrf2 was overexpressed at the earliest experimental times, triggering the catalase activity.</p><p><strong>Conclusions: </strong>The data reported confirmed that internal topography and post-production treatments on Ti surfaces dynamically and positively conditioned the DPSC progress toward the osteogenic phenotype; moreover, the combination with LipoMix quickened the positive modulation of inflammation under osteogenic conditions. Therefore, the development of customized surfaces along with the administration of differentiating factors enclosed in a liposomal delivery system could represent a promising and innovative tool in regenerative dentistry.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"427-438"},"PeriodicalIF":0.0,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142515587","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 Implant Analog Design and Additively Manufactured Casts' Printing Layer Thickness on the Linear and Angular Accuracy of Analogs for Direct Digital Workflow: An In Vitro Study.","authors":"Mustafa Borga Dönmez, Gülce Çakmak, Münir Demirel, Çiğdem Kahveci, Martin Schimmel","doi":"10.11607/jomi.11127","DOIUrl":"10.11607/jomi.11127","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate how implant analog design and printing layer thickness can affect the linear and angular accuracy of implant analogs in additively manufactured casts compared to conventional implant analogs in stone casts.</p><p><strong>Materials and methods: </strong>A reference cobalt chromium mandibular model with a single implant was digitized using an industrial optical scanner and scan bodies that were compatible with a pressure/friction fit (S) or a screw retained (N) implant analog for direct digital workflow. These scans were used to fabricate casts with 50-µm (S-50 and N-50) (n = 10) and 100- µm (S-100 and N-100) layer thickness (n = 10). A total of 10 stone casts were made after single-step closed-tray polyvinyl siloxane impressions of the model (CNV) were made. All casts were digitized with the same metal scan body and scanner used to digitize the master model. These scans were then superimposed over the scan of the master model to measure the linear (x, y, and z- axes) and angular (XY and YZ planes) deviations (Geomagic Control X). The precision of measured deviations was defined with the average deviation values. Generalized linear model analysis was used to compare the deviations within implant analogs for direct digital workflow, while a one-way analysis of variance (ANOVA) and Dunnett's test were used to compare these analogs and conventional analogs (α = .05).</p><p><strong>Results: </strong>The analog design affected the linear deviations (y-axis), while the interaction between the analog design and the layer thickness affected the angular deviations (XY plane, P ≤ .030) of the analog design. S analogs had lower linear and angular deviations than N analogs, and S-50 led to lower angular deviations than N-50 (P ≤ .030). CNV led to higher linear accuracy (y-axis) than N-50, N-100, and S-100 and led to lower angular deviations than all test groups (XY plane) (P ≤ .025).</p><p><strong>Conclusions: </strong>The analogs in S-50 casts had positional trueness similar to or higher than those in other test groups, and their accuracy was mostly similar to those in CNV casts. Implant analogs for direct digital workflow deviated more toward lingual and gingival, and conventional analogs deviated more toward buccal, occlusal, and distal. All analogs had a tendency to tilt toward the lingual and distal directions.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"449-458"},"PeriodicalIF":0.0,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142376496","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":"Implants as Surveyed Crowns for Implant-Assisted Removable Partial Dentures: A Long-Term Case Series Study.","authors":"Shing-Zeng Dung, Shyh-Yuan Lee, Jea-Shen Tsai, I-Shiang Tzeng","doi":"10.11607/jomi.11202","DOIUrl":"10.11607/jomi.11202","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the long-term outcomes and assess the risk factors associated with marginal bone loss (MBL) for implant-assisted removable partial denture surveyed crowns (IARPDSCs).</p><p><strong>Materials and methods: </strong>A total of 51 implants were placed in 14 partially or fully edentulous patients and restored using IARPDSCs. Implant crowns or bridges served asabutments for removable partial dentures (RPDs) to enhance their esthetics, comfort, and function. All patients attended regular follow-up appointments every 3 to 6 months for up to 12.5 years, which included professional cleaning and oral hygiene reinforcement. The collected data included patient demographics, treatment modality, arch restoration, Kennedy classification, RPD connection and retention design, opposing dentition, implant characteristics (location, connection type, and diameter), and any complications. The clinical assessments included plaque score, bleeding on probing, probing depth, marginal tissue recession, and keratinized mucosa width. Univariate and multivariate analyses were performed to identify factors influencing the MBL of implants in IARPDSCs.</p><p><strong>Results: </strong>One implant failed during follow-up; thus, the implant survival rate was 98%. All patients were satisfied with their prostheses and reported only minor complications. Univariate analysis showed a significantly higher MBL in maxillary implants than in mandibular implants (P = .045). Multiple regression analysis revealed that bruxism (P = .002) and maxillary implants (P = .013) were significantly associated with a higher MBL. Female sex (P = .051) and anterior implants (P = .058) exhibited an association with higher MBL.</p><p><strong>Conclusions: </strong>Within the limitations of this retrospective clinical study, IARPDSCs demonstrated predictable long-term success in carefully selected and well-maintained patients.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"468-476"},"PeriodicalIF":0.0,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142607869","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":"Abutment-free Tissue-Level Implants for Personalized Monolithic Zirconia Implant Crowns: A Retrospective Cohort Study.","authors":"A Ionescu, M Marin, N Bayrich, P Fennema, M I Nicolescu, R E Jung, A Dodi","doi":"10.11607/jomi.11144","DOIUrl":"https://doi.org/10.11607/jomi.11144","url":null,"abstract":"<p><strong>Purpose: </strong>This study aims to compare the peri-implant bone surrounding a new abutment free tissue-level implant design with classic tissue-level implants restored with titanium-base abutments.</p><p><strong>Materials and methods: </strong>A retrospective cohort study was conducted between 2018 and 2022 in patients requiring dental implants. A total of 53 patients received either a novel abutment-free tissue-level implant (n₁ = 50 sites) or a conventional tissue-level implant (n₂ = 50 sites). Patients were monitored for one year after prosthetic loading, with the primary endpoint being any change in hard tissue around the implant. Bone resorption was evaluated using cone beam computed tomography (CBCT). Statistical analyses included Fisher's exact test for categorical variables and Student's t-test for continuous variables. Longitudinal outcomes were assessed using linear mixed models to account for within patient correlations over time. The models incorporated treatment group, time, and their interaction, with statistical significance evaluated using Wald tests. Non-inferiority was assessed with one-sided p-values <0.025, while two-sided p-values <0.05 indicated statistical significance.</p><p><strong>Results: </strong>No significant differences in patient demographics or complications were found between abutment-free and conventional implants. However, abutment-free implants exhibited less buccal bone loss than traditional implants. The abutment-free implant group had significantly lower buccal bone loss (p-values of 0.025 and 0.024 for oral palatal/lingual bone and alveolar ridge width, respectively).</p><p><strong>Conclusion: </strong>The results of this study suggest that abutment-free dental implants offer advantages in reducing buccal bone loss compared to conventional implants, potentially due to their ability to mitigate risks to peri-implant tissues. Further research is warranted to evaluate their long-term efficacy and safety.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-26"},"PeriodicalIF":0.0,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144692898","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":"Discrepancy in Crestal Bone Height Level for Adjacent Dental Implants, When is it Significant? A Retrospective Study With a Minimum of 1-Year Follow-Up.","authors":"Najla S Kasabreh, Shima Malaikah, Hadyia Khurshid, Musa Q Khan, Hom-Lay Wang","doi":"10.11607/jomi.11208","DOIUrl":"https://doi.org/10.11607/jomi.11208","url":null,"abstract":"<p><strong>Purpose: </strong>This retrospective study investigated the influence of discrepancy in crestal bone height between neighboring implants.</p><p><strong>Methods: </strong>Medical and dental records and periapical radiographs of individuals with at least two adjacent implants were retrieved and analyzed. Records were divided into two groups according to the prosthetic part: non-splinted and splinted groups. Furthermore, groups were categorized by crestal bone height differences between the two adjacent implant platforms into < 0.75mm, 0.76-1.25mm,1.26-1.75, an >1.75mm. Radiographic measurements were performed at 3-time points: time of abutment placement (T0), 1-3 years follow-up (T1), and at the last visit (T2). Multilevel linear regression models using generalized estimating equations were used, with a significance level of 5% (α=0.05).</p><p><strong>Results: </strong>Fifty-six patient records with 120 implants (84 non-splinted (70%) and 36 splinted (30%)) were included. In the non-splinted group, the mean mesial mean bone loss (T2-T0) of the most posteriorly positioned implant was 2.9 mm, 3.1 mm, 3.4 mm, and 3.9 mm across height intervals. The mean distal bone loss of the most anteriorly positioned implant was 3.1 mm, 3.3 mm, 3.4 mm, and 3.9 mm across height intervals. In the splinted group, mean mesial bone loss was 1.1 mm, 2.1 mm, 2.7 mm, and 0.9 mm along different height intervals, while the mean distal bone loss was 1.6 mm, 2.1 mm, 1.6 mm, and 1.3 mm. Results from linear regression showed that non-splinted implants exhibit greater marginal bone loss progression as the vertical difference between adjacent implants increases (p<0.001). The splinted group showed 1.73 mm less bone loss than the non-splinted group at the mesial sides when both had the same CBHL difference (p<0.001) and 1.79 mm more bone loss on the distal side (p<0.001).</p><p><strong>Conclusions: </strong>This study suggests that marginal bone loss progression depends on the difference in crestal height and is aggravated in non splinted implants.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-25"},"PeriodicalIF":0.0,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144692900","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":"Demineralization Promotes Changes on Bone Surface that Improve Osteoblasts' Growth.","authors":"Samira Salmeron, Marcelo Oliveira Freire, Carlos Ferreira Dos Santos, Rodrigo Cardoso de Oliveira, Paulo Noronha Lisboa-Filho, Larisa Baldo Arruda, Luciana Daniele Trino, Adriana Campos Passanezi Sant'Ana, Homayoun Hossein Zadeh, Maria Lúcia Rubo de Rezende","doi":"10.11607/jomi.11334","DOIUrl":"https://doi.org/10.11607/jomi.11334","url":null,"abstract":"<p><strong>Purpose: </strong>Superficial bone demineralization has been shown to favor graft consolidation and cell behavior; however, the mechanisms involved are unclear. Therefore, this study aimed to understand the role of bone structural changes on cell biology after demineralization with citric acid.</p><p><strong>Material and methods: </strong>Bone samples harvested from rats' calvaria were assigned to receive one of the treatments (n=15): demineralization with 10% citric acid (CA.10), demineralization with 50% citric acid (CA.50), or washing with saline solution (C). MC3T3-E1 cells cultured on treated bone surfaces were analyzed regarding morphology and spreading. SEM and confocal microscopy were used in other samples (n=5) before and after demineralization with CA.10 or CA.50 to access chemical composition (%A) and surface parameters.</p><p><strong>Results: </strong>Cells grown on demineralized bone surfaces were flatter, spread, and presented more elongated filopodia than those cultured on non-demineralized surfaces. The surface area covered by cells was significantly larger after 24h of culture in CA.10 and CA.50 than in the control group. Demineralization had no effect on Ra and Sa parameters, but P-V and P-P decreased significantly. %A was not affected by demineralization.</p><p><strong>Conclusion: </strong>Both CA concentrations produced bone surface changes that can promote pre-osteoblast growth and morphology compatible with advanced stages of differentiation.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-22"},"PeriodicalIF":0.0,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144692899","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 Gap and Screw Loosening in CAD/CAM Materials for Implant-Supported Fixed Partial Dentures: An In Vitro Study.","authors":"Abdulrahman S Aldakhili, Majd A Alotaibi, Abdulmohsen Alsalman, Yousif A Al-Dulaijan, Haidar A Alalawi, Ashwin C Yermal, Ahmad M Al-Thobity","doi":"10.11607/jomi.11390","DOIUrl":"https://doi.org/10.11607/jomi.11390","url":null,"abstract":"<p><strong>Purpose: </strong>Material selection significantly impacts implant-supported fixed partial dentures (IS-FPDs) clinical performance. This study assessed and compared the marginal gap, screw loosening, and their relationship in 3-unit IS-FPDs.</p><p><strong>Materials and methods: </strong>Fifty frameworks were fabricated from zirconia (Zir), chrome-cobalt (Co-Cr), titanium (Ti), polyetheretherketone (PEEK), and polyetherketoneketone (PEKK) (n=10 each) using CAD/CAM technology on a standardized two-implant model. Vertical marginal discrepancies were measured using scanning electron microscopy at four points per framework/abutment interface. Screw loosening was assessed using a digital torque device. Data were analyzed using SPSS with a significance level of P<0.05.</p><p><strong>Results: </strong>The marginal mean gap differed significantly between the groups across all four surfaces (P<.001). Overall, PEEK had the smallest gap (67.22 ± 15.55 μm), followed by Ti (105.65 ± 30.52 μm), PEKK (106.80 ± 34.58 μm), and Zir (115.62 ± 22.02 μm), with Co-Cr showing the largest (176.87 ± 88.34 μm). In screw loosening tests, PEKK demonstrated the lowest values in both molar (0.44% ± 0.73%) and premolar (0.06% ± 1.40%) abutments, whereas PEEK showed the highest values in molar (1.03% ± 1.21%) and Co-Cr in premolar (2.15% ± 1.29%) abutments. No significant correlation was observed between the marginal gap and screw loosening (P>.05).</p><p><strong>Conclusions: </strong>The findings of this study emphasize the critical role of material selection. PEEK offers superior marginal adaptation, potentially reducing microleakage, while PEKK enhances screw stability, minimizing prosthetic complications.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-20"},"PeriodicalIF":0.0,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144644488","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":"AI-Driven Design of Auxiliary Devices to Improve Intraoral Scanning Accuracy in Complete-Arch Implant Cases.","authors":"Yu Pan, Weixuan Chen, Peter Moy, Edmond Pow","doi":"10.11607/jomi.11415","DOIUrl":"10.11607/jomi.11415","url":null,"abstract":"<p><strong>Purpose: </strong>To develop auxiliary devices for intraoral (IO) scanning of complete-arch implants using a deep-learning AI model.</p><p><strong>Materials and methods: </strong>A total of 338 sets of 3D imaging data were collected from a dental laboratory. Of these, 300 sets of complete dental arches were used for training, 38 sets for validation, and 10 edentulous arches with 4-6 dental implants for testing. Auxiliary devices, with landmarks placed between implants to aid in image stitching, were manually designed and used as a control. A Multi-Layer Perceptron artificial neural network was employed to predict the positions of the landmarks, using normalized implant coordinates as input and landmark coordinates as output. The model was validated and evaluated using the test set to assess the fit of the base and the surface area of the landmarks.</p><p><strong>Results: </strong>The bounding box loss for the training and validation sets converged to 0.02 and 0.01, respectively, indicating high precision in predicting landmark positions. The objectness loss stabilized at 0.05 for the training set and 0.03 for the validation set, confirming the model's robust detection capability. The root mean square (RMS) of the device base was 0.117 ± 0.053 mm, significantly smaller than the clinical threshold of 0.300 mm (p < 0.001). The surface area of the AI-generated device landmarks (762.0 ± 141.7 mm²) was significantly smaller than that of the manually designed control (1307.1 ± 286.1 mm², p = 0.001).</p><p><strong>Conclusions: </strong>The AI model demonstrates exceptional performance in the task. The base of the AI-generated auxiliary device fits well with the edentulous region, while its landmark teeth are smaller than those of the manually designed control.</p>","PeriodicalId":94230,"journal":{"name":"The International journal of oral & maxillofacial implants","volume":"0 0","pages":"1-20"},"PeriodicalIF":1.7,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144644473","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}