Journal of Prosthetic Dentistry最新文献

{"title":"Influence of nonhazardous postprocessing solutions and surface treatments on the surface roughness and color stability of resins used for additively manufactured definitive restorations.","authors":"Nicolas Michel Rotter, Gabriela Panca Sabatini, Çiğdem Kahveci, Hyung-In Yoon, Manrique Fonseca, Faris Z Jamjoom, Burak Yilmaz, Gülce Çakmak","doi":"10.1016/j.prosdent.2025.02.016","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.016","url":null,"abstract":"<p><strong>Statement of problem: </strong>Knowledge of the surface roughness and color stability of definitively intended additively manufactured (AM) resins when different postprocessing cleaning solutions and surface treatments are applied is limited.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to evaluate the effect of postprocessing cleaning solution and surface treatment (polishing and coffee thermocycling) on the surface roughness and color stability of resins intended for AM definitive restorations. In addition, the color coordinates were compared with an A1 shade tab.</p><p><strong>Material and methods: </strong>Sixty specimens were AM from 2 different resins, a glass-filler reinforced composite resin (AM-CR) and urethane acrylate-based resin (AM-UA), for definitive restorations. The specimens were divided into 3 groups based on the postprocessing cleaning solution (n=10): 96% ethanol, water-based solvent, and methyl ether solvent. The surface roughness (Ra) and color coordinates were measured before polishing, after polishing, and after coffee thermocycling for 5000 cycles. Color difference values (ΔE₀₀) were calculated, and color coordinates were compared with a reference shade tab (α=.05).</p><p><strong>Results: </strong>AM-CR had a lower R_a with ethanol than methyl ether solvent before polishing (P=.006). AM-UA had the lowest R_a with ethanol and the highest R_a with water-based solvent before polishing (P≤.001). Irrespective of material and postprocessing solution, R_a decreased after polishing (P≤.001). AM-CR had the highest ΔE₀₀ with methyl ether solvent after polishing and after coffee thermocycling (P≤.002). AM-CR had the lowest ΔE₀₀ with ethanol after coffee thermocycling (P≤.003).</p><p><strong>Conclusions: </strong>Resin type, postprocessing cleaning solution, and surface treatment affected the surface roughness and color stability of AM resins intended for definitive restorations.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143692590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of digitally fabricated occlusal devices in the treatment of temporomandibular disorders: A pilot study.","authors":"Yunpeng Wei, Ruitong Guo, Jiali Meng, Guofeng Wu, Peihua Shi, Zhifeng He, Yingjie Yi, Sufeng Zhao","doi":"10.1016/j.prosdent.2025.02.038","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.038","url":null,"abstract":"<p><strong>Statement of problem: </strong>Digitally fabricated occlusal devices represent a novel approach to treating temporomandibular disorders (TMDs), yet they have not been adequately evaluated.</p><p><strong>Purpose: </strong>The purpose of this pilot clinical study was to develop a manufacturing process for a digitally fabricated occlusal device, assess its therapeutic effectiveness for various types of TMDs, and examine factors influencing treatment outcomes.</p><p><strong>Material and methods: </strong>The records of patients with TMDs treated with a digitally fabricated occlusal device from May 2023 to October 2024 were retrospectively analyzed. They were divided into 3 groups based on the diagnosis: anterior disc displacement with reduction (ADDwR), anterior disc displacement without reduction (ADDwoR), or unilateral anterior disc displacement with reduction and unilateral anterior disc displacement without reduction (ADDwR +ADDwoR). Visual analog scale (VAS) scores for pain, diet, mandibular function (MF), and quality of life (QoL) and maximum interincisal opening (MIO) were compared before and at least 8 weeks after treatment. A nonparametric test was used to analyze changes in VAS scores and MIO before and after treatment (α=.05). Effects of sex, age, horizontal or vertical overlap, wearing time, and thickness of the device on the treatment were analyzed using binary logistic regression.</p><p><strong>Results: </strong>Forty-one patients with a mean ±standard deviation age of 27.95 ±11.04 years and a mean ±standard deviation follow-up of 12.51 ±14.10 weeks were evaluated. Pain, diet, MF, and QoL were significantly improved after treatment with a digitally fabricated occlusal device (P<.05), with effective rates of 80.6%, 73.5%, 74.4%, and 66.7%, respectively. Wearing time and thickness of the device affected the treatment (P<.05), whereas sex, age, and horizontal or vertical overlap did not affect the treatment (P>.05).</p><p><strong>Conclusions: </strong>Digitally fabricated occlusal devices were found to be effective treatment options for TMDs. Wearing a digitally fabricated occlusal device for 24 hours a day led to improved therapeutic outcomes. A 1- to 2-mm-thick device was found to be more effective than 2- to 3- or ≥3-mm options.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143692585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A digital workflow for a custom osteotomy guide for alveolar ridge splitting using an ultrasonic osteotome.","authors":"Xin Feng, Ziqianhong Wan, Xueqi Gan, Zhuoli Zhu","doi":"10.1016/j.prosdent.2025.02.034","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.034","url":null,"abstract":"<p><p>A digital method of designing a patient-specific osteotomy guide for an ultrasonic osteotome used for alveolar ridge splitting is described. The cutting paths are planned based on the ideal restoration and cone beam computed tomography (CBCT) and then transferred to surgery by the osteotomy guide. Detachable lateral guides and longitudinal guide planes enable the required bone plate formation. This approach enhances accuracy, safety, and customization in alveolar ridge splitting.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143673585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Custom design of a temporomandibular joint prosthesis: A kinematic approach evaluated by finite element analysis.","authors":"Manuel Mejía Rodríguez, Octavio Andrés González-Estrada, Hernán D Sánchez-Restrepo","doi":"10.1016/j.prosdent.2025.02.061","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.061","url":null,"abstract":"<p><strong>Statement of problem: </strong>Designing temporomandibular joint (TMJ) prostheses that accurately replicate natural kinematic movement and stress distribution remains a challenge because standardized methods for determining the prosthetic kinematic center are lacking. Current designs often rely on empirical placements without considering individualized kinematic parameters, which can compromise functionality and longevity.</p><p><strong>Purpose: </strong>The purpose of this study was to establish an optimal prosthetic kinematic center location for a custom TMJ prosthesis based on invariant TMJ anatomic landmarks to improve design efficiency, kinematic accuracy, and standardization in patient-specific applications.</p><p><strong>Material and methods: </strong>A woman diagnosed with TMJ dysfunction was selected for this study. A 3-dimensional model of her TMJ was reconstructed from computed tomography scans to create a custom prosthesis based on the Walter Lorenz model. Finite element analysis simulated mechanical responses to prosthetic kinematic center placements using anatomic references to guide positioning. Analyses included von Mises stress, minimum principal stress, and kinematic translation under set boundary conditions. The TMJ prosthesis was evaluated based on bone mechanical properties and constraints to replicate natural joint movement accurately.</p><p><strong>Results: </strong>The optimized prosthetic kinematic center location improved anteroposterior movement, effectively addressing translational deficiencies often caused by lateral pterygoid muscle resection. Maximum von Mises stress was recorded at 31 MPa, and minimum principal stress at -52.68 MPa, both within the material's tolerance, confirming structural stability. These results demonstrate consistent stress distribution and alignment with natural TMJ kinematics, suggesting potential improvements in prosthetic performance and patient comfort.</p><p><strong>Conclusions: </strong>This prosthetic kinematic center-based design approach enhances kinematic precision and biomechanical function in TMJ prostheses, closely aligning prosthetic movement with natural condylar action. The method provides a standardized framework for individualized TMJ prosthesis design, potentially extending prosthesis longevity and functionality. Studies with larger sample sizes are recommended to verify the clinical applicability and long-term benefits of this approach.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143692563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A completely digital workflow for a maxillary tooth-supported complete overdenture and mandibular telescopic denture to manage the treatment of a patient with hypohidrotic ectodermal dysplasia.","authors":"Xian Tao, Zhiqiang Xu, Zhiming Lin, Qianju Wu","doi":"10.1016/j.prosdent.2025.02.033","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.033","url":null,"abstract":"<p><p>This clinical report provides a complete digital workflow for the rehabilitation of a 17-year-old male patient who had been diagnosed with hypohidrotic ectodermal dysplasia. A maxillary tooth-supported overdenture was used with a mandibular computer-aided design and a computer-aided manufacturing telescopic denture with occlusal modifications. This digital workflow significantly reduced chairside time and enhanced the precision of the fit.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143673583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of photopolymerization and autopolymerization of three different dual-polymerizing self-adhesive resin cements on cell viability.","authors":"Ahmet Tolga Deniz, Ulviye Şebnem Büyükkaplan, Burçin Aşkım Gümüş, Özlem Daltaban, Nurullah Türker","doi":"10.1016/j.prosdent.2025.02.059","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.059","url":null,"abstract":"<p><strong>Statement of problem: </strong>While dual-polymerizing self-adhesive resin cements have been widely used because of their bonding capabilities and ease of use, there is a lack of comprehensive data on their biocompatibility, particularly concerning the cytotoxic effects of different polymerization methods on cell viability.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to investigate the potential cytotoxic effects of 3 different dual-polymerizing self-adhesive resin cements polymerized by light polymerization or autopolymerization on L929 cells in vitro using by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium-bromide (MTT) test.</p><p><strong>Material and methods: </strong>Three different dual-polymerizing self-adhesive resin cements (Calibra Universal; Dentsply Sirona Inc, SpeedCEM Plus; Ivoclar AG, and TheraCem Ca; Bisco Inc) were light or autopolymerized in polytetrafluoroethylene (PTFE) molds containing Ø5-mm and 2-mm-thick cells in accordance to the manufacturer's instructions. The specimens were incubated in Dulbecco Modified Eagle Medium (DMEM-High; Capricorn Scientific GmbH) for 48 hours and the extracts were obtained. The 100% concentration of the extract was diluted and extracts at 66.7%, 44.4%, 29.6%, and 19.8% concentrations were obtained. Specimen extracts at 5 different concentrations were incubated with L929 (NCTC clone 929: CCL 1; American Type Culture Collection) mouse fibroblast cells in 96-well tissue culture plates at 37 °C and 5% CO₂ for 24, 48, and 72 hours. At the end of the incubation period, the effects of the materials on cell viability were evaluated with the MTT test. The data were analyzed using a statistical software program (IBM SPSS Statistics, v25.0; IBM Corp) (α=.05), employing ANOVA and the Tukey's HSD test.</p><p><strong>Results: </strong>All tested cement specimens significantly reduced cell viability (P<.05). Cell viability decreased with increasing concentration and incubation time in all specimens tested. The light-polymerized SpeedCem Plus showed the least cytotoxicity regardless of concentration and incubation time, followed by TheraCem Ca. However, the autopolymerized Calibra Universal significantly reduced cell viability. Cell viability rate of all light polymerized cements was considerably higher than autopolymerized cements (P<.05).</p><p><strong>Conclusions: </strong>All the tested self-adhesive resin cements caused a significant reduction in viability of L929 cells. The composition of the self-adhesive resin cement and the activation type of polymerization affected cytotoxicity.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143673941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Retrospective analysis of removable partial denture treatment in a state-sponsored dental school.","authors":"Joseph Curtis, Stephanie E Lewis, Chandler Pendleton, Leonardo Marchini","doi":"10.1016/j.prosdent.2025.02.041","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.041","url":null,"abstract":"<p><strong>Statement of problem: </strong>Removable partial dentures (RPDs) provide an important treatment option for replacing missing teeth, particularly for vulnerable populations. However, RPDs have been associated with damage to the remaining dentition, which can lead to treatment failure.</p><p><strong>Purpose: </strong>The purpose of this retrospective clinical study was to investigate the failure rates of RPD treatments among patients at a state-sponsored dental school and identify factors contributing to these failures.</p><p><strong>Material and methods: </strong>A retrospective analysis was conducted using electronic health records (EHRs) from 4941 individuals for a total of 7529 patient-arches. The outcome of RPD treatment was defined as failure when any major procedure was performed on any tooth adjacent to a treated edentulous span. The time to event was measured from the date of RPD placement to the first recorded failure or the last follow-up visit (censored). A multivariable Cox proportional hazards model was employed to assess the hazard ratios for the variables of interest (α=.05).</p><p><strong>Results: </strong>The average age of the cohort was 59 years, 52% female, and the mean follow-up period was 35 months. Among the arches that experienced failure (24.2%), the average time to failure was 33 months. In the multivariable model, statistically significant associations with RPD failure were found for several variables: Kennedy classification without distal extension (HR=1.23, P<.001), older age (HR=1.01, P<.001), male sex (HR=1.17, P=.008), maxillary arch (HR=1.60, P<.001), lack of insurance (HR=0.78, P<.001), cast metal framework (HR=0.55, P<.001), tobacco use (HR=1.21, P=.002), and dental fear (HR=1.26, P=.003).</p><p><strong>Conclusions: </strong>While the associations were not particularly strong, dental school patients who smoked, experienced dental anxiety, or received maxillary RPDs or RPDs without a cast metal framework demonstrated an elevated risk of requiring major treatment to the abutment teeth, leading to the failure of the RPD treatment.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143673958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Accuracy of bi-coordinate and multi-coordinate handpiece calibration methods for robot-assisted implant placement.","authors":"Yi Li, Yin Zhou, Jizhe Lyu, Xunning Cao, Jianguo Tan, Xiaoqiang Liu","doi":"10.1016/j.prosdent.2025.02.057","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.057","url":null,"abstract":"<p><strong>Statement of problem: </strong>To ensure accurate robot-assisted surgery, it is essential to identify the handpiece position at the end effector of the robotic arm. Clinically, the relationship between the optical tracking device and the handpiece has been typically confirmed by using a calibration plate at the end effector of the robotic arm. However, the accuracy of the handpiece calibration methods for robot-assisted implant placement remains unclear.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to evaluate the accuracy of bi-coordinate and multi-coordinate handpiece calibration methods, as well as the multi-coordinate handpiece plate under partial obstruction, in the context of robot-assisted implant placement.</p><p><strong>Material and methods: </strong>In total, 120 implants were divided into 6 groups based on the calibration plate used in the study: bi-coordinate handpiece calibration plate for the maxilla (Bmx), bi-coordinate handpiece calibration plate for the mandible (Bmn), multi-coordinate handpiece calibration plate for the maxilla (Mmx), multi-coordinate handpiece calibration plate for the mandible (Mmn), partially obscured multi-coordinate handpiece calibration plate for the mandible with the primary coordinate unblocked and the auxiliary coordinate covered (MmnPrim), and partially obscured multi-coordinate handpiece calibration plate for the mandible with the auxiliary coordinate unblocked and the primary coordinate covered (MmnAux). Calibration of the robotic arm was conducted separately for each group. Then the robot autonomously performed osteotomies and implant placements at the first and second premolars according to the preoperative plan. Following surgery, the robotic software program calculated the deviation values between the planned and actual implant positions. Differences between the test groups were analyzed using 1-way analysis of variance (ANOVA) and the Bonferroni post hoc test (α=.05).</p><p><strong>Results: </strong>The ranges of angular deviation and 3-dimensional deviations at the implant platform and apex across the 6 groups were 0.30 degrees to 0.48 degrees, 0.31 to 0.36 mm, and 0.31 to 0.38 mm, respectively. No statistically significant differences were found among the groups (P>.05).</p><p><strong>Conclusions: </strong>Both the bi-coordinate and multi-coordinate handpiece calibration methods demonstrated acceptable accuracy for robot-assisted implant placement. The multi-coordinate calibration plate provides a feasible method for robot calibration in scenarios where the mandible is partially obstructed.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143670216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Physical and mechanical properties of various resins for additively manufactured definitive fixed dental restorations: Effect of material type and thermal cycling.","authors":"Abdulaziz Alhotan, Ahmed Mahmoud Fouda, Hanan Al-Johani, Hyung-In Yoon, Jukka P Matinlinna","doi":"10.1016/j.prosdent.2025.02.042","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.042","url":null,"abstract":"<p><strong>Statement of problem: </strong>Although additive manufacturing (AM) has facilitated the fabrication of resin-based definitive restorations, knowledge of the effects of artificial aging on their physical and mechanical properties is lacking.</p><p><strong>Purpose: </strong>The purpose of this in vitro study was to investigate the effects of material type and thermal cycling on the translucency, surface roughness, microhardness, and flexural strength of AM resins marketed for definitive restorations.</p><p><strong>Material and methods: </strong>Bar-shaped (25×2×2 mm) and disk-shaped (Ø10×2 mm) specimens from 4 different AM resin groups Crowntec (CT), Tera Harz TC-80DP (TH), VarseoSmile Crown plus (VS). and Permanent (CB) were prepared. The specimens were randomly distributed to 2 groups: (1) nonaged (stored in distilled water at 37 °C for 24 hours) and (2) aged (thermocycled for 10 000 cycles at 5 °C to 55 °C). For each specimen, the degree of conversion (DC) was determined using Fourier transform infrared spectroscopy. Color coordinates of the specimens were measured to calculate relative translucency parameter (RTP) values. Surface roughness (Ra) was measured with an optical profilometer, and Vickers microhardness values (VHN) were obtained. Flexural strength (σ) and elastic modulus (E) values were obtained by using the 3-point bend test. Scanning electron microscopy (SEM) was used to analyze the fractured surfaces. The data were statistically analyzed using factorial analysis of variance (ANOVA), followed by Tukey post hoc analyses and paired t tests (α=.05).</p><p><strong>Results: </strong>Both DC and RTP were significantly affected by material type (P<.001). The highest and lowest DC values were reported in CT and CB, respectively. None of the tested resins exceeded clinical thresholds of ΔRTP. The material type also had a significant impact on Ra (P<.001). VHN was significantly affected by material type (P<.001) and aging (P<.001). CT had the highest value, while TH had the lowest value, regardless of the aging condition. In addition, the σ and E were significantly affected by both material type (P<.001) and aging (P≤.002).</p><p><strong>Conclusions: </strong>The material type of the AM resins significantly impacted on their DC, RTP, Ra, VHN, σ, and E values. Thermal cycling of the tested resins also significantly affected their VHN, σ, and E values. No interactions were observed between material type and aging.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143670227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An esthetic solution for restoring a labially inclined implant by using an additively manufactured plug-assisted retained zirconia veneer: A dental technique.","authors":"Chenyang Xie, Manlin Sun, Zhicheng Yin, Li Han, Haiyang Yu","doi":"10.1016/j.prosdent.2025.02.036","DOIUrl":"https://doi.org/10.1016/j.prosdent.2025.02.036","url":null,"abstract":"<p><p>The facial opening of the screw access channel can lead to esthetic compromises in screw-retained restorations, while the use of cement-retained complete crowns may result in residual cement in the proximal areas, and traditional veneers without proximal coverage often lack adequate retention. To address these issues, a plug-assisted retained veneer was developed. First, the 3-dimensional position of an implant was obtained, and a custom abutment was designed to mimic the contour of a veneer preparation. Subsequently, the abutment was fabricated and positioned on the printed cast. After the acquisition of the scan data, a veneer with a plug was designed and produced. A reference scan was then obtained. Finally, the veneer with the plug was delivered, where a digital protocol was used to verify a good fit. This plug functions as a macro retention form while simultaneously seals the screw access opening, enhancing retention and the esthetic outcomes without compromising the fit.</p>","PeriodicalId":16866,"journal":{"name":"Journal of Prosthetic Dentistry","volume":" ","pages":""},"PeriodicalIF":4.3,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143670219","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}