International Journal of Computerized Dentistry最新文献

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Zirconia restorations and the tool diameter compensation. 氧化锆修复和刀具直径补偿。
IF 1.7 4区 医学
International Journal of Computerized Dentistry Pub Date : 2023-09-26 DOI: 10.3290/j.ijcd.b3836703
Christine Yazigi, Reinhard Busch, Matthias Kern
{"title":"Zirconia restorations and the tool diameter compensation.","authors":"Christine Yazigi,&nbsp;Reinhard Busch,&nbsp;Matthias Kern","doi":"10.3290/j.ijcd.b3836703","DOIUrl":"10.3290/j.ijcd.b3836703","url":null,"abstract":"<p><strong>Aim: </strong>The aim of the present article is to describe a new method to reduce the undesirable loss of material thickness that results from overmilling due to the tool diameter compensation correction of common CAD/CAM software.</p><p><strong>Materials and methods: </strong>Today's CAD/CAM software (eg, 3Shape or Exocad) specifies the same tool diameter compensation for different ceramics. In the case of zirconia ceramics milled in the raw state, this leads to excessive milling of the inner surfaces of crowns, which results in unnecessarily large cementation gaps and a restoration that is thinned out from the inside. By manually reducing the preset correction in the digital design process by the volumetric sintering shrinkage factor specified by the manufacturer, excessive thinning of the zirconia can be avoided.</p><p><strong>Results: </strong>The inner geometry of the restorations changes only slightly after manually reducing the preset tool diameter compensation correction. Consequently, a design of the restoration with the required minimum interocclusal thickness yet with accurate passive seating and marginal fit is possible without any further interventions.</p><p><strong>Conclusions: </strong>Understanding the specifics of the subtractive fabrication process as well as the properties of the restorative materials is a key factor in achieving optimal clinical outcomes with all-ceramic restorations fabricated with CAD/CAM technology. The use of monolithic zirconia combined with a calculated reduction in the preset tool diameter compensation correction might be beneficial in cases with thin or uneven geometry.</p>","PeriodicalId":48666,"journal":{"name":"International Journal of Computerized Dentistry","volume":"0 0","pages":"257-264"},"PeriodicalIF":1.7,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10613618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparison of load bearing capacity of ceramic crowns with zirconia or polyetherketoneketone frameworks. 陶瓷冠与氧化锆或聚醚酮框架的承载能力比较。
IF 1.7 4区 医学
International Journal of Computerized Dentistry Pub Date : 2023-09-26 DOI: 10.3290/j.ijcd.b3774269
Özge Seckin, Ceyda Akin, Mutlu Özcan
{"title":"Comparison of load bearing capacity of ceramic crowns with zirconia or polyetherketoneketone frameworks.","authors":"Özge Seckin,&nbsp;Ceyda Akin,&nbsp;Mutlu Özcan","doi":"10.3290/j.ijcd.b3774269","DOIUrl":"10.3290/j.ijcd.b3774269","url":null,"abstract":"<p><strong>Aim: </strong>The aim of the present study was to compare the load bearing capacity of monolithic or bilayered single crowns with zirconia or polyetherketoneketone frameworks designed and fabricated using CAD/CAM systems.</p><p><strong>Materials and methods: </strong>Cr-Co-based metal dies (n = 60) were duplicated from an extracted and prepared premolar and then restored with different CAD/CAM materials. The specimens were divided into five groups (n = 12) according to the type of materials: group S: monolithic zirconia-reinforced lithium disilicate; group ZI: bilayered zirconia framework with lithium disilicate; group ZE: bilayered zirconia framework with resin-infiltrated hybrid ceramic; group PI: bilayered polyetherketoneketone (PEKK) framework with lithium disilicate; group PE: bilayered PEKK framework with resin-infiltrated hybrid ceramic. The crown specimens were cemented on Cr-Co metal dies with a resin cement (Multilink N). The specimens were subjected to cyclic mechanical loading followed by load bearing testing. Data were analyzed using the Kruskal-Wallis and Mann-Whitney U tests (α = 0.05).</p><p><strong>Results: </strong>The monolithic crowns in group S (1930 ± 452.18 N) presented significantly higher load bearing capacity than those of the other groups (P < 0.05). This was followed by group ZI (1165.41 ± 264.04 N). The remaining groups demonstrated comparable results. Failure types were more frequent in all zirconia specimens that included veneering ceramic.</p><p><strong>Conclusions: </strong>Monolithic zirconia-reinforced lithium disilicate CAD/CAM ceramics showed superior load bearing capacity compared with all other bilayered counterparts. All CAD/CAM materials tested remarkably exceeded the average occlusal force in the posterior region.</p>","PeriodicalId":48666,"journal":{"name":"International Journal of Computerized Dentistry","volume":"0 0","pages":"227-236"},"PeriodicalIF":1.7,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9072262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dentistry, where are you going? 牙医,你要去哪里?
IF 1.7 4区 医学
International Journal of Computerized Dentistry Pub Date : 2023-09-26 DOI: 10.3290/j.ijcd.b4440063
Florian Beuer
{"title":"Dentistry, where are you going?","authors":"Florian Beuer","doi":"10.3290/j.ijcd.b4440063","DOIUrl":"https://doi.org/10.3290/j.ijcd.b4440063","url":null,"abstract":"","PeriodicalId":48666,"journal":{"name":"International Journal of Computerized Dentistry","volume":"26 3","pages":"195-196"},"PeriodicalIF":1.7,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41166597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Zirconia CAD/CAM machining vibrations related to zirconia blank shape and initial digital nesting. 氧化锆CAD/CAM加工振动与氧化锆坯料形状和初始数字嵌套有关。
IF 1.7 4区 医学
International Journal of Computerized Dentistry Pub Date : 2023-09-26 DOI: 10.3290/j.ijcd.b3774277
Ameer Biadsee, Eran Dolev, Vladimer Perlis, Ofir Rosner, Shchada Masarwa, Zeev Ormianer
{"title":"Zirconia CAD/CAM machining vibrations related to zirconia blank shape and initial digital nesting.","authors":"Ameer Biadsee,&nbsp;Eran Dolev,&nbsp;Vladimer Perlis,&nbsp;Ofir Rosner,&nbsp;Shchada Masarwa,&nbsp;Zeev Ormianer","doi":"10.3290/j.ijcd.b3774277","DOIUrl":"10.3290/j.ijcd.b3774277","url":null,"abstract":"<p><strong>Aim: </strong>To evaluate CAD/CAM milling vibrations related to zirconia disk design, framework, and location of digital crown nesting during zirconia soft milling.</p><p><strong>Materials and methods: </strong>In the present in vitro study, 25 round zirconia disks of 98 mm (R group) and 15 D-shaped zirconia disks of 71 mm (D group) were placed in a 5-axis CAD/CAM milling unit. The R group had 3 crown milling sites (n = 75) and the D group had 2 crown milling sites (n = 30). In the R group, site A was located 57 mm, site B was 92 mm, and site C was 123 mm from the machine holder attachment. In the D group, site A was 57 mm and site C was 123 mm from the machine holder attachment. A vibration meter (VB-8200; Lutron) was connected to the disk holder, and data (mm/second) were collected during the milling process at the different nesting locations. One-way ANOVA with post-hoc tests and Bonferroni correction for multiple tests were used to compare the groups (α = 0.05).</p><p><strong>Results: </strong>In the R group, site C exhibited the highest mean vibration values compared with site A (P = 0.001). The first and second cutting tools (2.5 and 1 mm) exhibited statistically significant differences between the D and R groups at milling sites A and C (P < 0.001 and P = 0.003, respectively).</p><p><strong>Conclusions: </strong>Milling vibration increased as the distance between the machine holder arm and a digitally nested site increased. Round zirconia disks induced higher vibration values compared with D-shaped disks.</p>","PeriodicalId":48666,"journal":{"name":"International Journal of Computerized Dentistry","volume":"0 0","pages":"211-216"},"PeriodicalIF":1.7,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9072261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Survival and success of veneered zirconia crowns. 贴面氧化锆牙冠的生存和成功。
IF 1.7 4区 医学
International Journal of Computerized Dentistry Pub Date : 2023-09-26 DOI: 10.3290/j.ijcd.b3796761
Elisabeth Prause, Jeremias Hey, Guido Sterzenbach, Florian Beuer, Ufuk Adali
{"title":"Survival and success of veneered zirconia crowns.","authors":"Elisabeth Prause,&nbsp;Jeremias Hey,&nbsp;Guido Sterzenbach,&nbsp;Florian Beuer,&nbsp;Ufuk Adali","doi":"10.3290/j.ijcd.b3796761","DOIUrl":"10.3290/j.ijcd.b3796761","url":null,"abstract":"<p><strong>Aim: </strong>The aim of the present study was to evaluate the long-term clinical survival and success rate of veneered zirconia crowns with a modified anatomical framework design after 10 years in function.</p><p><strong>Materials and methods: </strong>In total, 36 zirconia crowns were fabricated for 28 patients. An anatomically modified framework design was developed. Crowns were inserted between 2008 and 2009. A follow-up of 19 patients with 28 crowns was conducted in 2020 to document mechanical and biologic parameters. Additionally, a modified version of the pink esthetic score (PES) was documented. Patient satisfaction was assessed using United States Public Health Service (USPHS) criteria. The success and survival rates were calculated using the Kaplan-Meier analysis.</p><p><strong>Results: </strong>After more than 10 years of clinical service, the survival rate of the zirconia crowns was 92.9%. Biologic complications occurred in 12% of the examined crowns, whereas technical complications occurred in 54%. Mostly, chippings (50%) and insufficient marginal gaps (50%) were observed. Most crowns were positively evaluated for more than one technical complication. Periodontal conditions with probing depths of up to 3 mm were comparable with measured values before crown delivery (73% to 75%). Most of the crowns had modified PES values of 10 or higher. Patient satisfaction was high.</p><p><strong>Conclusions: </strong>The modified framework design led to a high survival rate of the crowns but a relatively low success rate. High patient satisfaction and inconspicuous periodontal conditions were demonstrated. Biologic complications occurred far less frequently than technical complications.</p>","PeriodicalId":48666,"journal":{"name":"International Journal of Computerized Dentistry","volume":"0 0","pages":"247-255"},"PeriodicalIF":1.7,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10519103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of core buildup composite resin translucency on intraoral scanner accuracy: an in vitro study. 堆芯复合树脂半透明性对口腔内扫描仪准确性的影响:一项体外研究。
IF 1.7 4区 医学
International Journal of Computerized Dentistry Pub Date : 2023-09-26 DOI: 10.3290/j.ijcd.b3774253
Nhat Dinh-Minh Nguyen, Nguyen Chi Tran, Trang Tran, Nam Cong-Nhat Huynh, Khoa Dang Nguyen, Hung Hoang, Ding-Han Wang, Ming-Lun Hsu
{"title":"Effects of core buildup composite resin translucency on intraoral scanner accuracy: an in vitro study.","authors":"Nhat Dinh-Minh Nguyen,&nbsp;Nguyen Chi Tran,&nbsp;Trang Tran,&nbsp;Nam Cong-Nhat Huynh,&nbsp;Khoa Dang Nguyen,&nbsp;Hung Hoang,&nbsp;Ding-Han Wang,&nbsp;Ming-Lun Hsu","doi":"10.3290/j.ijcd.b3774253","DOIUrl":"10.3290/j.ijcd.b3774253","url":null,"abstract":"<p><strong>Aim: </strong>The accuracy of 3D images produced by an intraoral scanner (IOS) is affected by the optical characteristics of restorative materials such as metal, ceramic, and composite resin. The present in vitro study aimed to investigate the impact of core buildup composite resin translucency on IOS accuracy.</p><p><strong>Materials and methods: </strong>A core buildup procedure was performed on a proprietary 3D-printed model using injectable composite resins in four groups with different levels of translucency (highest to lowest: AE, A3, AO3, and EX). Ten experimental scans per group were performed using a Medit i700 IOS on a phantom head-mounted model. Reference scans were obtained using an industrial scanner (Solutionix C500). Values of accuracy (trueness and precision) for the respective groups were evaluated using mean deviation values following 3D superimposition.</p><p><strong>Results: </strong>Composite resin translucency caused the scale reduction of the optical impressions. Values of trueness showed the highest scale reduction in AE, significantly, followed by A3, AO3, and EX. Considering 50 μm as the cut-off value of deviations for clinical acceptability, the analysis showed most deviations in AE and A3. Similar results were found with precision, where AE showed the highest deviation value statistically, followed by A3, AO3, and EX.</p><p><strong>Conclusions: </strong>Composite resin translucency affects the accuracy of optical impressions, causing a fitting error of CAD/CAM prostheses. The more translucent the composite resin, the less accurate the optical impression. This suggests the need for proper compensation during prosthesis designing for an optimal clinical result. In addition, practitioners should indicate in the digital workflow the proper restorative materials regarding not only the mechanical properties and esthetics, but also the optical characteristics.</p>","PeriodicalId":48666,"journal":{"name":"International Journal of Computerized Dentistry","volume":"0 0","pages":"201-210"},"PeriodicalIF":1.7,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10859004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Influence of DLP and SLA printer technology on the accuracy of surgical guides for implant dentistry in free-end situations. DLP和SLA打印机技术对自由端情况下种植牙手术指南准确性的影响。
IF 1.7 4区 医学
International Journal of Computerized Dentistry Pub Date : 2023-09-26 DOI: 10.3290/j.ijcd.b3774115
Vinzenz Le, Andreas Keßler, Matthias Folwaczny
{"title":"Influence of DLP and SLA printer technology on the accuracy of surgical guides for implant dentistry in free-end situations.","authors":"Vinzenz Le,&nbsp;Andreas Keßler,&nbsp;Matthias Folwaczny","doi":"10.3290/j.ijcd.b3774115","DOIUrl":"10.3290/j.ijcd.b3774115","url":null,"abstract":"<p><strong>Aim: </strong>The present in vitro study aimed to compare the accuracy of the implant position inserted by surgical guides manufactured by three different 3D printers (one SLA and two DLP) and a subtractive manufacturing technique for a free-end situation.</p><p><strong>Materials and methods: </strong>Surgical guides were manufactured using three different 3D printers, one SLA printer (Form 2; Formlabs) and two DLP printers (D20 II; Rapid Shape, and SolFlex 350; W2P Engineering). Surgical guides manufactured using the conventional CAD/CAM-based subtractive method served as controls. In total, 48 surgical guides were printed and assessed for accuracy. The guides were used for the placement of implants at tooth position 37. The postoperative implant position was digitally scanned for metric comparison with the preoperatively planned implant position.</p><p><strong>Results: </strong>Significant differences were found when the SLA and DLP printers were compared. The SLA printer showed significantly lower accuracy in implant displacement at crest (P = 0.032) and angular displacement (P = 0.049) compared with the two DLP printers. The DLP printers showed comparable values to the control group. The results were within an acceptable clinical range.</p><p><strong>Conclusion: </strong>DLP technology seems to be superior to conventional SLA technology in terms of the accuracy of 3D-printed surgical guides when used for placement of implants in free-end situations.</p>","PeriodicalId":48666,"journal":{"name":"International Journal of Computerized Dentistry","volume":"0 0","pages":"217-226"},"PeriodicalIF":1.7,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10859005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Strength of implant-supported lithium disilicate and polymer-infiltrated ceramic network restorations after thermomechanical aging. 植入物支撑的二硅酸锂和聚合物渗透陶瓷网络修复体在热机械老化后的强度。
IF 1.7 4区 医学
International Journal of Computerized Dentistry Pub Date : 2023-09-26 DOI: 10.3290/j.ijcd.b3781703
Alfonso Gil, George Eliades, Mutlu Özcan, Ronald E Jung, Christoph H F Hämmerle, Alexis Ioannidis
{"title":"Strength of implant-supported lithium disilicate and polymer-infiltrated ceramic network restorations after thermomechanical aging.","authors":"Alfonso Gil,&nbsp;George Eliades,&nbsp;Mutlu Özcan,&nbsp;Ronald E Jung,&nbsp;Christoph H F Hämmerle,&nbsp;Alexis Ioannidis","doi":"10.3290/j.ijcd.b3781703","DOIUrl":"10.3290/j.ijcd.b3781703","url":null,"abstract":"<p><strong>Aim: </strong>To evaluate the fracture load and type of failure of two different monolithic restorative materials bonded to standardized titanium bases and fabricated by two different procedures regarding the bonding interface.</p><p><strong>Materials and methods: </strong>All screw-retained implant crown specimens (n = 40), subjected to fatigue by thermomechanical loading, differed in the restorative material (lithium disilicate [LDS] or polymer-infiltrated ceramic network [PICN], referred to as 'hybrid ceramic' [HYC]) and the interface type between the restorative material and the titanium base abutment (prefabricated ex-factory or produced during a CAM-milling procedure). This resulted in the following groups (n = 10/group): 1) LDS-M: lithium disilicate crown with a CAM-milled interface; 2) LDS-P: lithium disilicate crown with a prefabricated interface; 3) HYC-M: PICN crown with a CAM-milled interface; and 4) HYC-P: PICN crown with a prefabricated interface. Aged specimens underwent static fracture load testing. The load (N) at which the initial crack occurred was denoted as Finitial, and the maximal load (N) at which the restorations fractured as Fmax. All specimens were examined under a stereomicroscope to determine the failure mode.</p><p><strong>Results: </strong>The median Finitial values were 180 N for LDS-M, 343 N for LDS-P, 340 N for HYC-M, and 190 N for HYC-P. The median Fmax values were 1822 N for LDS-M, 2039 N for LDS-P, 1454 N for HYC-M, and 1581 N for HYC-P. The intergroup differences were significant for Finitial (KW: P = 0.0042) and for Fmax (KW: P = 0.0010). The failure types also showed differences between the restorative groups.</p><p><strong>Conclusions: </strong>The choice of restorative material had a stronger influence on the fracture load than the abutment interface workflow. Lithium disilicate showed the highest load for initial crack appearance (Finitial) and for complete fracture of the restoration (Fmax).</p>","PeriodicalId":48666,"journal":{"name":"International Journal of Computerized Dentistry","volume":"0 0","pages":"237-245"},"PeriodicalIF":1.7,"publicationDate":"2023-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10519102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
WITHDRAWN: Accuracy and reproducibility of tablet-based applications for three-dimensional facial scanning: an in-vitro study. 撤回: 基于平板电脑的三维面部扫描应用的准确性和可重复性:一项体外研究。
IF 1.8 4区 医学
International Journal of Computerized Dentistry Pub Date : 2023-06-21 DOI: 10.3290/j.ijcd.b4170275
Deise Caldas Kühlman, Mohammed Almuzian, Christianne Coppini, Emad Eddin Alzoubi
{"title":"WITHDRAWN: Accuracy and reproducibility of tablet-based applications for three-dimensional facial scanning: an in-vitro study.","authors":"Deise Caldas Kühlman, Mohammed Almuzian, Christianne Coppini, Emad Eddin Alzoubi","doi":"10.3290/j.ijcd.b4170275","DOIUrl":"10.3290/j.ijcd.b4170275","url":null,"abstract":"<p><p>This article has been withdrawn at the request of the author(s).</p>","PeriodicalId":48666,"journal":{"name":"International Journal of Computerized Dentistry","volume":"0 0","pages":"0"},"PeriodicalIF":1.8,"publicationDate":"2023-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9672996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Survival dependence of 3D-printed temporary materials on the filler content. 3d打印临时材料对填充物含量的生存依赖性。
IF 1.7 4区 医学
International Journal of Computerized Dentistry Pub Date : 2023-05-26 DOI: 10.3290/j.ijcd.b3759607
Robert Bauer, Julian Zacher, Thomas Strasser, Alois Schmid, Martin Rosentritt
{"title":"Survival dependence of 3D-printed temporary materials on the filler content.","authors":"Robert Bauer,&nbsp;Julian Zacher,&nbsp;Thomas Strasser,&nbsp;Alois Schmid,&nbsp;Martin Rosentritt","doi":"10.3290/j.ijcd.b3759607","DOIUrl":"https://doi.org/10.3290/j.ijcd.b3759607","url":null,"abstract":"<p><strong>Aim: </strong>The aim of the present study was the evaluation of the in vitro performance and fracture force of 3D-printed anterior implant-supported temporary partial dentures (TPDs) with different filler content.</p><p><strong>Materials and methods: </strong>Identical anterior resin-based TPDs (tooth sites 11 to 13; n = eight per material) were 3D printed from methacrylate resins with different filler content. A cartridge polymethyl methacrylate (PMMA) material was used as a reference. After temporary cementation, combined thermal cycling and mechanical loading (TCML) was performed on all the restorations to mimic clinical application. Behavior during TCML and fracture force was determined, and failures were analyzed. Data were statistically investigated (Kolmogorov-Smirnov test, one-way ANOVA; post hoc Bonferroni, Kaplan-Meier survival; α = 0.05).</p><p><strong>Results: </strong>Failure during TCML varied between three failures and total failure during loading time. Mean survival time varied between 93 ± 206 x 103 cycles and 329 ± 84 x 103 cycles. Significantly different survival cycles between the individual materials could be determined (Mantel Cox log-rank test: chi-square: 21,861; degrees of freedom (df) = 4, P < 0.001). A correlation between filler level and survival cycles could be found (Pearson: 0.186, P = 0.065). Fracture values of the surviving TPDs varied between 499 and 835 N. Failures were characterized by fracture of the connector (n = 24) followed by fractures at the abutment (n = 10).</p><p><strong>Conclusions: </strong>TDPs showed different filler-dependent survival. Individual 3D-printed materials provided comparable or even better performance than a standard cartridge system and might be sufficient for temporary application of at least half a year.</p>","PeriodicalId":48666,"journal":{"name":"International Journal of Computerized Dentistry","volume":"26 2","pages":"159-166"},"PeriodicalIF":1.7,"publicationDate":"2023-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9521366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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