Journal of Advanced Prosthodontics最新文献_第10页

Three-dimensional analysis of the outcome of different scanning strategies in virtual interocclusal registration. 虚拟咬合配准中不同扫描策略效果的三维分析。

IF 2.6 3区医学

Journal of Advanced Prosthodontics Pub Date : 2022-12-01 DOI: 10.4047/jap.2022.14.6.369

Jiansong Mei, Liya Ma, Jiarui Chao, Fei Liu, Jiefei Shen

{"title":"Three-dimensional analysis of the outcome of different scanning strategies in virtual interocclusal registration.","authors":"Jiansong Mei, Liya Ma, Jiarui Chao, Fei Liu, Jiefei Shen","doi":"10.4047/jap.2022.14.6.369","DOIUrl":"https://doi.org/10.4047/jap.2022.14.6.369","url":null,"abstract":"Purpose: The purpose of this in vitro study was to assess whether scanning strategies of virtual interocclusal record (VIR) affect the accuracy of VIR during intraoral scanning.Materials and methods: Five pairs of reference cubes were added to the digital upper and lower dentitions of a volunteer, which were printed into resin casts. Subsequently, the resin casts were articulated in the maximal intercuspal position in a mechanical articulator and scanned with an industrial computed tomography system, of which the VIR was served as a reference VIR. The investigated VIR of the upper and lower jaws of the resin master cast were recorded with an intraoral scanner according to 9 designed scanning strategies. Then, the deviation between the investigated VIRs and reference VIR were analyzed, which were measured by the deviation of the distances of six selected reference points on the upper reference cubes in each digital cast to the XY-plane between the investigated VIRs and reference VIR.Results: For the deviation in the right posterior dentitions, RP group (only scanning of right posterior dentitions) showed the smallest deviation. Besides, BP group (scanning of bilateral posterior dentitions) showed the smallest deviation in the left posterior dentitions. Moreover, LP group (scanning of left posterior dentitions) showed the smallest deviation in the anterior dentitions. For the deviation of full dental arches, BP group showed the smallest deviation.Conclusion: Different scanning strategies of VIR can influence the accuracy of alignment of virtual dental casts. Appropriate scanning strategies of VIR should be selected for different regions of interest and edentulous situations.","PeriodicalId":51291,"journal":{"name":"Journal of Advanced Prosthodontics","volume":"14 6","pages":"369-378"},"PeriodicalIF":2.6,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/7d/d9/jap-14-369.PMC9832144.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10572830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Biomechanical investigation of maxillary implant-supported full-arch prostheses produced with different framework materials: a finite elements study. 上颌种植体支持的不同框架材料全弓修复体的生物力学研究:有限元研究。

IF 2.6 3区医学

Journal of Advanced Prosthodontics Pub Date : 2022-12-01 DOI: 10.4047/jap.2022.14.6.346

Mirac Berke Topcu Ersöz, Emre Mumcu

{"title":"Biomechanical investigation of maxillary implant-supported full-arch prostheses produced with different framework materials: a finite elements study.","authors":"Mirac Berke Topcu Ersöz, Emre Mumcu","doi":"10.4047/jap.2022.14.6.346","DOIUrl":"https://doi.org/10.4047/jap.2022.14.6.346","url":null,"abstract":"Purpose: Four and six implant-supported fixed full-arch prostheses with various framework materials were assessed under different loading conditions.Materials and methods: In the edentulous maxilla, the implants were positioned in a configuration of four to six implant modalities. CoCr, Ti, ZrO2, and PEEK materials were used to produce the prosthetic structure. Using finite element stress analysis, the first molar was subjected to a 200 N axial and 45° oblique force. Stresses were measured on the bone, implants, abutment screw, abutment, and prosthetic screw. The Von Mises, maximum, and minimum principal stress values were calculated and compared.Results: The maximum and minimum principal stresses in bone were determined as CoCr < ZrO2 < Ti < PEEK. The Von Mises stresses on the implant, implant screw, abutment, and prosthetic screws were determined as CoCr < ZrO2 < Ti < PEEK. The highest Von Mises stress was 9584.4 Mpa in PEEK material on the prosthetic screw under 4 implant-oblique loading. The highest maximum principal stress value in bone was found to be 120.89 Mpa, for PEEK in 4 implant-oblique loading.Conclusion: For four and six implant-supported structures, and depending on the loading condition, the system accumulated different stresses. The distribution of stress was reduced in materials with a high elastic modulus. When choosing materials for implant-supported fixed prostheses, it is essential to consider both the number of implants and the mechanical and physical attributes of the framework material.","PeriodicalId":51291,"journal":{"name":"Journal of Advanced Prosthodontics","volume":"14 6","pages":"346-359"},"PeriodicalIF":2.6,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/5b/de/jap-14-346.PMC9832146.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10572834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Analysis of surface characteristics of (Y, Nb)-TZP after finishing and polishing. (Y, Nb)-TZP精加工抛光后表面特性分析。

IF 2.6 3区医学

Journal of Advanced Prosthodontics Pub Date : 2022-12-01 DOI: 10.4047/jap.2022.14.6.335

Seong-Keun Yoo, Ye-Hyeon Jo, In-Sung Luke Yeo, Hyung-In Yoon, Jae-Hyun Lee, Jin-Soo Ahn, Jung-Suk Han

{"title":"Analysis of surface characteristics of (Y, Nb)-TZP after finishing and polishing.","authors":"Seong-Keun Yoo, Ye-Hyeon Jo, In-Sung Luke Yeo, Hyung-In Yoon, Jae-Hyun Lee, Jin-Soo Ahn, Jung-Suk Han","doi":"10.4047/jap.2022.14.6.335","DOIUrl":"https://doi.org/10.4047/jap.2022.14.6.335","url":null,"abstract":"Purpose: This in vitro study aimed to evaluate the surface characteristics of a full veneer crown fabricated chairside (CS) from a (Y, Nb)-TZP zirconia block in response to conventional zirconia grinding and polishing.Materials and methods: Zirconia crowns (n = 40) were first prepared and divided into two groups of materials: Labside (LS) and CS, after which each specimen went through a five-step grinding and polishing procedure. Following each surface treatment, surface characteristics were analyzed using confocal laser microscopy (CLSM), average surface roughness (Ra) values were processed from the profile data through Gaussian filtering, and X-ray diffraction pattern analysis was performed to evaluate the monoclinic (M) phase content. Then, a representative specimen was selected for field-emission scanning electron microscopy (FE-SEM), followed by a final analysis of the roughness and X-ray diffraction of the specimens using the independent t-test and repeated measures analysis of variance (RM-ANOVA).Results: In every group, polishing significantly reduced the Ra values (P < .001). There was no significant difference in Ra between the polished state CS and LS. Furthermore, CLSM and FE-SEM investigations revealed that even though grain exposure was visible in CS specimens throughout the as-delivered and ground states, the exposure was reduced after polishing. Moreover, while no phase transformation was visible in the LS, phase transformation was visible in CS after every surface treatment, with the M phase content of the CS group showing a significant reduction after polishing (P < .001).Conclusion: Within the limits of this study, clinically acceptable level of surface finishing of (Y, Nb)-TZP can be achieved after conventional zirconia polishing sequence.","PeriodicalId":51291,"journal":{"name":"Journal of Advanced Prosthodontics","volume":"14 6","pages":"335-345"},"PeriodicalIF":2.6,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/6a/a9/jap-14-335.PMC9832147.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10572837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of effect of accelerated aging on interim fixed dental materials using digital technologies. 利用数字技术评估临时固定牙材料加速老化的影响。

IF 2.6 3区医学

Journal of Advanced Prosthodontics Pub Date : 2022-12-01 DOI: 10.4047/jap.2022.14.6.360

Omar Alageel, Omar Alsadon, Haitham Almansour, Abdullah Alshehri, Fares Alhabbad, Majed Alsarani

{"title":"Assessment of effect of accelerated aging on interim fixed dental materials using digital technologies.","authors":"Omar Alageel, Omar Alsadon, Haitham Almansour, Abdullah Alshehri, Fares Alhabbad, Majed Alsarani","doi":"10.4047/jap.2022.14.6.360","DOIUrl":"https://doi.org/10.4047/jap.2022.14.6.360","url":null,"abstract":"Purpose: This study assessed the physical and mechanical properties of interim crown materials fabricated using various digital techniques after accelerated aging.Materials and methods: Three groups of interim dental restorative materials (N = 20) were tested. The first group (CO) was fabricated using a conventional manual method. The second group (ML) was prepared from prefabricated resin blocks for the milling method and cut into specimen sizes using a cutting disc. The third group (3D) was additively manufactured using a digital light-processing (DLP) 3D printer. Aging acceleration treatments using toothbrushing and thermocycling simulators were applied to half of the specimens corresponding to three years of usage in the oral environment (N = 10). Surface roughness (Ra), Vickers microhardness, 3-point bending, sorption, and solubility tests were performed. A 2-way analysis of variance (ANOVA) and Fisher's multiple comparison test were used to compare the results among the groups.Results: The mean surface roughness (Ra) of the resin after accelerated aging was significantly higher in the CO and ML groups than that before aging, but not in the 3D group. All groups showed reduced hardness after accelerated aging. The flexural strength values were highest in the 3D group, followed by the ML and CO groups after accelerated aging. Accelerated aging significantly reduced water sorption in the ML group.Conclusion: According to the tested material and 3D printer type, both 3D-printed and milled interim restoration resins showed higher flexural strength and modulus, and lower surface roughness than those prepared by the conventional method after accelerated aging.","PeriodicalId":51291,"journal":{"name":"Journal of Advanced Prosthodontics","volume":"14 6","pages":"360-368"},"PeriodicalIF":2.6,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/04/ce/jap-14-360.PMC9832148.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10579564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Accuracy of 14 intraoral scanners for the All-on-4 treatment concept: a comparative in vitro study. 14个口内扫描仪对All-on-4治疗概念的准确性:一项体外比较研究。

IF 2.6 3区医学

Journal of Advanced Prosthodontics Pub Date : 2022-12-01 DOI: 10.4047/jap.2022.14.6.388

Gözde Kaya, Caglar Bilmenoglu

{"title":"Accuracy of 14 intraoral scanners for the All-on-4 treatment concept: a comparative in vitro study.","authors":"Gözde Kaya, Caglar Bilmenoglu","doi":"10.4047/jap.2022.14.6.388","DOIUrl":"https://doi.org/10.4047/jap.2022.14.6.388","url":null,"abstract":"Purpose: This in vitro study aimed to evaluate the accuracy of 14 different intraoral scanners for the All-on-4 treatment concept.Materials and methods: Four implants were placed in regions 13, 16, 23, and 26 of an edentulous maxillary model that was poured with scannable Type 4 gypsum to imitate the All-on-4 concept. The cast was scanned 10 times for each of 14 intraoral scanners (Primescan, iTero 2, iTero 5D, Virtuo Vivo, Trios 3, Trios 4, CS3600, CS3700, Emerald, Emerald S, Medit i500, BenQ BIS-I, Heron IOS, and Aadva IOS 100P) after the polyether ether ketone scanbody was placed. For the control group, the gypsum model was scanned 10 times with an industrial scanner. The first of the 10 virtual models obtained from the industrial model was chosen as the reference model. For trueness, the data of the 14 dental scanners were superimposed with the reference model; for precision, the data of all 14 scanners were superimposed within the groups. Statistical analyses were performed using the Kolmogorov-Smirnov, Shapiro-Wilks, and Dunn's tests.Results: Primescan showed the highest trueness and precision values (P < .005), followed by the iTero 5D scanner (P < .005).Conclusion: Some of these digital scanners can be used to make impressions within the All-on-4 concept. However, the possibility of data loss due to artifacts, reflections, and the inability to combine the data should be considered.","PeriodicalId":51291,"journal":{"name":"Journal of Advanced Prosthodontics","volume":"14 6","pages":"388-398"},"PeriodicalIF":2.6,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/fa/e8/jap-14-388.PMC9832143.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10572833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Effect of repair methods and materials on the flexural strength of 3D-printed denture base resin. 修复方法和材料对3d打印义齿基托树脂抗弯强度的影响。

IF 2.6 3区医学

Journal of Advanced Prosthodontics Pub Date : 2022-10-01 Epub Date: 2022-10-28 DOI: 10.4047/jap.2022.14.5.305

Hamile Emanuella do Carmo Viotto, Marcela Dantas Dias Silva, Thaís Soares Bezerra Santos Nunes, Sabrina Romão Gonçalves Coelho, Ana Carolina Pero

{"title":"Effect of repair methods and materials on the flexural strength of 3D-printed denture base resin.","authors":"Hamile Emanuella do Carmo Viotto, Marcela Dantas Dias Silva, Thaís Soares Bezerra Santos Nunes, Sabrina Romão Gonçalves Coelho, Ana Carolina Pero","doi":"10.4047/jap.2022.14.5.305","DOIUrl":"https://doi.org/10.4047/jap.2022.14.5.305","url":null,"abstract":"Purpose: The aim of this study was to evaluate the flexural strength of a 3D-printed denture base resin (Cosmos Denture), after different immediate repair techniques with surface treatments and thermocycling.Materials and methods: Rectangular 3D-printed denture base resin (Cosmos Denture) specimens (N = 130) were thermocycled (5,000 cycles, 5℃ and 55℃) before and after the different repair techniques (n = 10 per group) using an autopolymerized acrylic resin (Jet, J) or a hard relining resin (Soft Confort, SC), and different surface treatments: Jet resin monomer for 180 s (MMA), blasting with aluminum oxide (JAT) or erbium: yttrium-aluminum-garnet laser (L). The control group were intact specimens. A three-point flexural strength test was performed, and data (MPa) were analyzed by ANOVA and Games-Howell post hoc test (α = 0.05). Each failure was observed and classified through stereomicroscope images and the surface treatments were viewed by scanning electron microscope (SEM).Results: Control group showed the highest mean of flexural strength, statistically different from the other groups (P < .001), followed by MMA+J group. The groups with L treatment were statistically similar to the MMA groups (P > .05). The JAT+J group was better than the SC and JAT+SC groups (P < .05), but similar to the other groups (P > .05). Adhesive failures were most observed in JAT groups, especially when repaired with SC. The SEM images showed surface changes for all treatments, except JAT alone.Conclusion: Denture bases fabricated with 3D-printed resin should be preferably repaired with MMA+J. SC and JAT+SC showed the worst results. Blasting impaired the adhesion of the SC resin.","PeriodicalId":51291,"journal":{"name":"Journal of Advanced Prosthodontics","volume":"14 5","pages":"305-314"},"PeriodicalIF":2.6,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/da/a6/jap-14-305.PMC9672696.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40491186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Grain size, crystalline phase and fracture toughness of the monolithic zirconia. 整体氧化锆的晶粒尺寸、晶相及断裂韧性。

IF 2.6 3区医学

Journal of Advanced Prosthodontics Pub Date : 2022-10-01 Epub Date: 2022-10-28 DOI: 10.4047/jap.2022.14.5.285

Kodchakorn Bocam, Chuchai Anunmana, Trinuch Eiampongpaiboon

{"title":"Grain size, crystalline phase and fracture toughness of the monolithic zirconia.","authors":"Kodchakorn Bocam, Chuchai Anunmana, Trinuch Eiampongpaiboon","doi":"10.4047/jap.2022.14.5.285","DOIUrl":"https://doi.org/10.4047/jap.2022.14.5.285","url":null,"abstract":"Purpose: This study evaluated the relationship among translucency, crystalline phase, grain size, and fracture toughness of zirconia.Materials and methods: Four commercial zirconia - Prettau®Anterior® (PA), Prettau® (P), InCorisZI (ZI), and InCorisTZI (TZI)- were selected for this study. The bar specimens were prepared to determine fracture toughness by using chevron notched beam method with four-point bending test. The grain size was evaluated by a mean linear intercept method using a scanning electron microscope. X-ray diffraction and Rietveld refinement were performed to evaluate the amount of tetragonal and cubic phases of zirconia. Contrast ratio (CR) was measured to investigate the level of translucency.Results: PA had the lowest fracture toughness among other groups (P < .05). In addition, the mean fracture toughness of P was significantly less than that of ZI, but there was no difference compared with TZI. Regarding grain size measurement, PA had the largest average grain size among the groups. P obtained larger grain size than ZI and TZI (P < .05). However, there was no significant difference between ZI and TZI. Moreover, PA had the lowest CR value compared with the other groups (P < .05). This means PA was the most translucent material in this study. Rietveld refinement found that PA presented the greatest percentage of cubic phase, followed by TZI, ZI, and P, respectively.Conclusion: The different approaches are used by manufacturers to fabricate various types of translucent zirconia with different levels of translucency and mechanical properties, which should be concerned for material selection for successful clinical outcome.","PeriodicalId":51291,"journal":{"name":"Journal of Advanced Prosthodontics","volume":"14 5","pages":"285-293"},"PeriodicalIF":2.6,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/70/ce/jap-14-285.PMC9672698.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40505383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Effect of barium silicate filler content on mechanical properties of resin nanoceramics for additive manufacturing. 硅酸钡填料含量对增材制造用树脂纳米陶瓷力学性能的影响。

IF 2.6 3区医学

Journal of Advanced Prosthodontics Pub Date : 2022-10-01 Epub Date: 2022-10-28 DOI: 10.4047/jap.2022.14.5.315

Sun Won, Kyung-Ho Ko, Chan-Jin Park, Lee-Ra Cho, Yoon-Hyuk Huh

{"title":"Effect of barium silicate filler content on mechanical properties of resin nanoceramics for additive manufacturing.","authors":"Sun Won, Kyung-Ho Ko, Chan-Jin Park, Lee-Ra Cho, Yoon-Hyuk Huh","doi":"10.4047/jap.2022.14.5.315","DOIUrl":"https://doi.org/10.4047/jap.2022.14.5.315","url":null,"abstract":"Purpose: The purpose of this study was to investigate the effect of barium silicate filler contents on mechanical properties of resin nanoceramics (RNCs) for additive manufacturing (AM).Materials and methods: Additively manufactured RNC specimens were divided into 4 groups depending on the content of ceramic fillers and polymers: 0% barium silicate and 100% polymer (B0/P10, control group); 50% barium silicate and 50% polymer (B5/P5); 60% barium silicate and 40% polymer (B6/P4); 67% barium silicate and 33% polymer (B6.7/P3.3). The compressive strength (n = 15) and fracture toughness (n = 12) of the specimens were measured, and scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS) analyses were performed. Independent sample Kruskal-Wallis tests were performed on the compressive strength and fracture toughness test results, and the significance of each group was analyzed at the 95% confidence interval through post-tests using the Bonferroni's method.Results: B6/P4 and B6.7/P3.3 exhibited much higher yield strength than B0/P10 and B5/P5 (P < .05). Compared to the control group (B0/P10), the other three groups exhibited higher ultimate strength (P < .05). The fracture toughness of B6/P4 and B6.7/P3.3 were similar (P > .05). The content of barium silicate and fracture toughness showed a positive correlation coefficient (R = 0.582). SEM and EDS analyses revealed the presence of an oval-shaped ceramic aggregate in B6/P4 specimens, whereas the ceramic filler and polymer substrate were homogeneously mixed in B6.7/P3.3.Conclusion: Increasing the ceramic filler content improves the mechanical properties, but it can be accompanied by a decrease in the flowability and the homogeneity of the slurry.","PeriodicalId":51291,"journal":{"name":"Journal of Advanced Prosthodontics","volume":"14 5","pages":"315-323"},"PeriodicalIF":2.6,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/29/12/jap-14-315.PMC9672694.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40491185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Erratum - Color stability of 3D-printed denture resins: effect of aging, mechanical brushing and immersion in staining medium. 校正- 3d打印义齿树脂的颜色稳定性:老化，机械刷刷和浸泡在染色介质中的影响。

IF 2.6 3区医学

Journal of Advanced Prosthodontics Pub Date : 2022-10-01 Epub Date: 2022-10-28 DOI: 10.4047/jap.2022.14.5.334

引用次数: 1

Translucency and masking ability of translucent zirconia; comparison with conventional zirconia and lithium disilicate. 半透明氧化锆的半透明性和掩蔽能力与常规氧化锆和二硅酸锂的比较。

IF 2.6 3区医学

Journal of Advanced Prosthodontics Pub Date : 2022-10-01 Epub Date: 2022-10-28 DOI: 10.4047/jap.2022.14.5.324

Joon Hee Park, Hyun Ji Bang, Nak-Hyun Choi, Eun-Jin Park

{"title":"Translucency and masking ability of translucent zirconia; comparison with conventional zirconia and lithium disilicate.","authors":"Joon Hee Park, Hyun Ji Bang, Nak-Hyun Choi, Eun-Jin Park","doi":"10.4047/jap.2022.14.5.324","DOIUrl":"https://doi.org/10.4047/jap.2022.14.5.324","url":null,"abstract":"Purpose: The purpose of this study is to evaluate translucency and masking ability of translucent zirconia compared to conventional zirconia and lithium disilicate materials.Materials and methods: Three types of zirconia blocks with different yttria contents (3Y, 4Y, 5.5Y) and LS blocks (Rosetta SM) were used. Ten specimens for each group were fabricated with 10 mm diameter, with both 0.8 mm and 1.5 mm thicknesses (± 0.02 mm). All groups of zirconia specimens were sintered and polished according to the manufacturer's instructions. To calculate the translucency parameter (TP), CIELAB value was measured with a spectrophotometer on black and white backgrounds. To investigate the color masking abilities, background shades of A2, normal dentin, discolored dentin, and titanium were used. The color difference (ΔE) was calculated with the CIELAB values of A2 shade background as a reference compared with the values in the various backgrounds. One-way ANOVA and Bonferroni tests were conducted (P < .05).Results: The TP values of zirconia specimens increased as the yttria content increased. All materials used in the study were able to adequately mask normal dentin shade (ΔE < 5.5), but were incapable of masking severely discolored dentin (ΔE > 5.5). On the titanium background, all materials of 1.5 mm thickness were able to mask the background shade, but with a thickness of 0.8 mm, only 3Y-TZP and 4Y-PSZ were able to mask titanium background.Conclusion: All zirconia materials and lithium disilicate specimens used in this study were unable to adequately mask the shade of severely discolored dentin. It is recommended to use 3Y-TZP or 4Y-PSZ with a sufficient thickness of 0.8 mm or more to mask titanium.","PeriodicalId":51291,"journal":{"name":"Journal of Advanced Prosthodontics","volume":"14 5","pages":"324-333"},"PeriodicalIF":2.6,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/bd/5b/jap-14-324.PMC9672692.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40491184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2