Journal of Advanced Prosthodontics最新文献

{"title":"A retrospective comparison of clinical outcomes of implant restorations for posterior edentulous area: 3-unit bridge supported by 2 implants vs 3 splinted implant-supported crowns.","authors":"Yuseung Yi,&nbsp;Seong-Joo Heo,&nbsp;Jai-Young Koak,&nbsp;Seong-Kyun Kim","doi":"10.4047/jap.2022.14.4.223","DOIUrl":"https://doi.org/10.4047/jap.2022.14.4.223","url":null,"abstract":"<p><strong>Purpose: </strong>To compare the clinical outcomes of two types of implant restoration for posterior edentulous area, 3-unit bridge supported by 2 implants and 3 implant-supported splinted crowns.</p><p><strong>Materials and methods: </strong>The data included 127 implant-supported fixed restorations in 85 patients: 37 restorations of 3-unit bridge supported by 2 implants (2-IB), 37 restorations of 3 implant-supported splinted crowns (3-IC), and 53 single restorations (S) as controls. Peri-implantitis and mechanical complications that occurred for 14 years were analyzed by multivariable Cox regression model. Kaplan-Meier curves and the multivariable Cox regression model were used to analyze the success and survival of implants.</p><p><strong>Results: </strong>Peri-implantitis occurred in 28.4% of 2-IB group, 37.8% of 3-IC group, and 28.3% of S control group with no significant difference. According to the implant position, middle implants (P2) of the 3-IC group had the highest risk of peri-implantitis. The 3-IC group showed a lower mechanical complication rate (7.2%) than the 2-IB (16.2%) and S control group (20.8%). The cumulative success rate was 52.8% in S (control) group, 62.2% in 2-IB group, and 60.4% in 3-IC group. The cumulative survival rate was 98.1% in S (control) group, 98.6% in 2-IB group, and 95.5% in 3-IC group. There was no significant difference in the success and survival rate according to the restoration type.</p><p><strong>Conclusion: </strong>The restoration type was not associated with the success and survival of implants. The risk of mechanical complications was reduced in 3 implant-supported splinted crowns. However, the middle implants of the 3 implant-supported splinted crowns had a higher risk of peri-implantitis.</p>","PeriodicalId":51291,"journal":{"name":"Journal of Advanced Prosthodontics","volume":"14 4","pages":"223-235"},"PeriodicalIF":2.6,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/d3/5c/jap-14-223.PMC9444481.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40358825","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}

{"title":"Conventional and digital impressions for complete-arch implant-supported fixed prostheses: time, implant quantity effect and patient satisfaction.","authors":"Ana Larisse Carneiro Pereira,&nbsp;Vitória Ramos Medeiros,&nbsp;Maria de Fátima Trindade Pinto Campos,&nbsp;Annie Karoline Bezerra de Medeiros,&nbsp;Burak Yilmaz,&nbsp;Adriana da Fonte Porto Carreiro","doi":"10.4047/jap.2022.14.4.212","DOIUrl":"https://doi.org/10.4047/jap.2022.14.4.212","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate and compare the effect of impression type (conventional vs digital) and the number of implants on the time from the impressions to the generation of working casts of mandibular implant-supported fixed complete-arch frameworks, as well as on patient satisfaction.</p><p><strong>Materials and methods: </strong>17 participants, 3 or 4 implants, received 2 types of digital impression methods (DI) and conventional (CI). In DI, two techniques were performed: scanning with the scan bodies (SC) and scanning with a device attached to the scan bodies (SD) (BR 10 2019 026265 6). In CI, the making of a solid index (SI) and open-tray impression (OT) were used. The outcomes were used to evaluate the time and the participant satisfaction with conventional and digital impressions. The time was evaluated through the timing of the time obtained in the workflow in the conventional and digital impression. The effect of the number of implants on time was also assessed. Satisfaction was assessed through a questionnaire based on seven. The Wilcoxon test used to identify the statistical difference between the groups in terms of time. The Mann-Whitney test was used to analyze the relationship between the time and the number of implants. Fisher's test was used to assess the patient satisfaction (<i>P</i> < .05).</p><p><strong>Results: </strong>The time with DI was shorter than with CI (DI, x̃=02:58; CI, x̃=31:48) (<i>P</i> < .0001). The arches rehabilitated with 3 implants required shorter digital impression time (3: x̃=05:36; 4: x̃=09:16) (<i>P</i> < .0001). Regarding satisfaction, the DI was more comfortable and pain-free than the CI (<i>P</i> < .005).</p><p><strong>Conclusion: </strong>Digital impressions required shorter chair time and had higher patient acceptance than conventional impressions.</p>","PeriodicalId":51291,"journal":{"name":"Journal of Advanced Prosthodontics","volume":"14 4","pages":"212-222"},"PeriodicalIF":2.6,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/fa/d3/jap-14-212.PMC9444484.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40358824","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}

{"title":"Investigation of the marginal fit of a 3D-printed three-unit resin prosthesis with different build orientations and layer thicknesses.","authors":"Min-Seong Yang,&nbsp;Seong-Kyun Kim,&nbsp;Seong-Joo Heo,&nbsp;Jai-Young Koak,&nbsp;Ji-Man Park","doi":"10.4047/jap.2022.14.4.250","DOIUrl":"https://doi.org/10.4047/jap.2022.14.4.250","url":null,"abstract":"<p><strong>Purpose: </strong>The purpose of this study was to analyze the marginal fit of three-unit resin prostheses printed with the stereolithography (SLA) method in two build orientations (45°, 60°) and two layer thicknesses (50 µm, 100 µm).</p><p><strong>Materials and methods: </strong>A master model for a three-unit resin prosthesis was designed with two implant abutments. Forty specimens were printed using an SLA 3D printer. The specimens were printed with two build orientations (45°, 60°), and each orientation was printed with two layer thicknesses (50 µm, 100 µm). The marginal fit was measured as the marginal gap (MG) and absolute marginal discrepancy (AMD), and MG and AMD measurements were performed at 8 points per abutment, for 16 points per specimen. All statistical analyses were performed using SPSS software. Two-way analysis of variance (ANOVA) was separately performed on the MG and AMD values of the build orientations and layer thicknesses. Moreover, one-way ANOVA was performed for each point within each group.</p><p><strong>Results: </strong>The margins of the area adjacent to the pontic showed significantly high values, and the values were smaller when the build orientation was 45° than when it was 60°. However, the margin did not differ significantly according to the layer thicknesses.</p><p><strong>Conclusion: </strong>The marginal fit of the three-unit resin prosthesis fabricated by the SLA 3D method was affected by the pontic. Moreover, the marginal fit was affected by the build orientation. The 45° build orientation is recommended.</p>","PeriodicalId":51291,"journal":{"name":"Journal of Advanced Prosthodontics","volume":"14 4","pages":"250-261"},"PeriodicalIF":2.6,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/ea/ed/jap-14-250.PMC9444483.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40358826","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}

{"title":"Effect of surface treatment on shear bond strength of relining material and 3D-printed denture base.","authors":"Se-Jick Park,&nbsp;Joon-Seok Lee","doi":"10.4047/jap.2022.14.4.262","DOIUrl":"https://doi.org/10.4047/jap.2022.14.4.262","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to analyze the shear bond strength between the 3D-printed denture base and the chairside relining material, according to the surface treatment.</p><p><strong>Materials and methods: </strong>Cylindrical specimens were prepared using DENTCA Denture Base II. The experimental groups were divided into 6 (n = 10): no surface treatment (C), Tokuyama Rebase II Normal adhesive (A), sandblasting (P), sandblasting and adhesive (PA), sandblasting and silane (PS), and the Rocatec system (PPS). After bonding the chairside relining material to the center of the specimens in a cylindrical shape, they were stored in distilled water for 24 hours. Shear bond strength was measured using a universal testing machine, and failure mode was analyzed with a scanning electron microscope. Shear bond strength values were analyzed using one-way analysis of variance, and Tukey's honest significant difference test was used for post-hoc analysis (<i>P</i> < .05).</p><p><strong>Results: </strong>Group PPS exhibited significantly higher shear bond strength than all other groups. Groups P and PA displayed significantly higher bond strengths than the control group. There were no significant differences between groups PS and A compared to the control group. Regarding the failure mode, adhesive failure occurred primarily in groups C and A, and mixed failure mainly in groups P, PA, PS, and PPS.</p><p><strong>Conclusion: </strong>The shear bond strength between the 3D-printed denture base and the chairside relining material exhibited significant differences according to the surface treatment methods. It is believed that excellent adhesive strength will be obtained when the Rocatec system is applied to 3D-printed dentures in clinical practice.</p>","PeriodicalId":51291,"journal":{"name":"Journal of Advanced Prosthodontics","volume":"14 4","pages":"262-272"},"PeriodicalIF":2.6,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/d5/49/jap-14-262.PMC9444486.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40358827","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}

{"title":"Comparison of accuracy between digital and conventional implant impressions: two and three dimensional evaluations.","authors":"Chuang Bi,&nbsp;Xingyu Wang,&nbsp;Fangfang Tian,&nbsp;Zhe Qu,&nbsp;Jiaming Zhao","doi":"10.4047/jap.2022.14.4.236","DOIUrl":"https://doi.org/10.4047/jap.2022.14.4.236","url":null,"abstract":"<p><strong>Purpose: </strong>The present study compared the accuracy between digital and conventional implant impressions.</p><p><strong>Materials and methods: </strong>The experimental models were divided into six groups depending on the implant location and the scanning span. Digital impressions were captured using the intraoral optical scanner TRIOS (3Shape, Copenhagen, Denmark). Conventional impressions were taken with the monophase impression material based on addition-cured silicones, Honigum-Mono (DMG, Hamburg, Germany). A high-precision laboratory scanner D900 (3Shape, Copenhagen, Denmark) was used to obtain digital data of resin models and stone casts. Surface tessellation language (STL) datasets from scanner were imported into the analysis software Geomagic Qualify 14 (3D Systems, Rock Hill, SC, USA), and scan body deviations were determined through two-dimensional and three-dimensional analyses. Each scan body was measured five times. The Sidak t test was used to analyze the experimental data.</p><p><strong>Results: </strong>Implant position and scanning distance affected the impression accuracy. For a unilateral arch implant and the mandible models with two implants, no significant difference was observed in the accuracy between the digital and conventional implant impressions on scan bodies; however, the corresponding differences for trans-arch implants and mandible with six implants were extremely significant (<i>P</i><.001).</p><p><strong>Conclusion: </strong>For short-span scanning, the accuracy of digital and conventional implant impressions did not differ significantly. For long-span scanning, the precision of digital impressions was significantly inferior to that of the traditional impressions.</p>","PeriodicalId":51291,"journal":{"name":"Journal of Advanced Prosthodontics","volume":"14 4","pages":"236-249"},"PeriodicalIF":2.6,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/78/17/jap-14-236.PMC9444482.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40358829","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}

{"title":"Rating criteria to evaluate student performance in digital wax-up training using multi-purpose software.","authors":"Takuya Mino,&nbsp;Yoko Kurosaki,&nbsp;Kana Tokumoto,&nbsp;Takaharu Higuchi,&nbsp;Shinichi Nakanoda,&nbsp;Ken Numoto,&nbsp;Ikue Tosa,&nbsp;Aya Kimura-Ono,&nbsp;Kenji Maekawa,&nbsp;Tae Hyung Kim,&nbsp;Takuo Kuboki","doi":"10.4047/jap.2022.14.4.203","DOIUrl":"https://doi.org/10.4047/jap.2022.14.4.203","url":null,"abstract":"<p><strong>Purpose: </strong>The aim of this study was to introduce rating criteria to evaluate student performance in a newly developed, digital wax-up preclinical program for computer-aided design (CAD) of full-coverage crowns and preliminarily investigate the reliability and internal consistency of the rating system.</p><p><strong>Materials and methods: </strong>This study, conducted in 2017, enrolled 47 fifth-year dental students of Okayama University Dental School. Digital wax-up training included a fundamental practice using computer graphics (CG), multipurpose CAD software programs, and an advanced practice to execute a digital wax-up of the right mandibular second molar (#47). Each student's digital wax-up work (stereolithography data) was evaluated by two instructors using seven qualitative criteria. The total qualitative score (0-90) of the criteria was calculated. The total volumetric discrepancy between each student's digital wax-up work and a reference prepared by an instructor was automatically measured by the CAD software. The inter-rater reliability of each criterion was analyzed using a weighted kappa index. The relationship between the total volume discrepancy and the total qualitative score was analyzed using Spearman's correlation.</p><p><strong>Results: </strong>The weighted kappa values for the seven qualitative criteria ranged from 0.62 - 0.93. The total qualitative score and the total volumetric discrepancy were negatively correlated (ρ = -0.27, <i>P</i> = .09, respectively); however, this was not statistically significant.</p><p><strong>Conclusion: </strong>The established qualitative criteria to evaluate students' work showed sufficiently high inter-rater reliability; however, the digitally measured volumetric discrepancy could not sufficiently predict the total qualitative score.</p>","PeriodicalId":51291,"journal":{"name":"Journal of Advanced Prosthodontics","volume":"14 4","pages":"203-211"},"PeriodicalIF":2.6,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/a1/6a/jap-14-203.PMC9444485.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40358828","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}

{"title":"Effect of abutment neck taper and cement types on the amount of remnant cement in cement-retained implant restorations: an <i>in vitro</i> study.","authors":"Yeon-Hee Park,&nbsp;Kyoung-A Kim,&nbsp;Jung-Jin Lee,&nbsp;Tae-Min Kwon,&nbsp;Jae-Min Seo","doi":"10.4047/jap.2022.14.3.162","DOIUrl":"https://doi.org/10.4047/jap.2022.14.3.162","url":null,"abstract":"<p><strong>Purpose: </strong>The present study aims to analyze the effect of abutment neck taper and types of cement on the amount of undetected remnant cement of cement-retained implant prostheses.</p><p><strong>Materials and methods: </strong>Three neck taper angles (53°, 65°, 77°) and three types of cement (RMGI: resin-modified glass ionomer, ZPC: zinc phosphate cement, ZOE: zinc oxide eugenol cement) were used. For each group, the surface percentage was measured using digital image and graphic editing software. The weight of before and after removing remnant cement from the abutment-crown assembly was measured using an electronic scale. Two-way ANOVA and Duncan & Scheffe's test were used to compare the calculated surface percentage and weight of remnant cement (α = .05).</p><p><strong>Results: </strong>There were significant differences in remnant cement surface percentage and weight according to neck taper angles (<i>P</i> < .05). However, there were no significant differences in remnant cement surface percentage and weight on types of cement. No interaction was found between neck taper angles and types of luting cement (<i>P</i> > .05). The wide abutment with a small neck taper angle showed the most significant amount of remnant cement. And the types of luting cement did not influence the amount of residual cement.</p><p><strong>Conclusion: </strong>To remove excess cement better, the emergence profile of the crown should be straight to the neck taper of the abutment in cement-retained implant restoration.</p>","PeriodicalId":51291,"journal":{"name":"Journal of Advanced Prosthodontics","volume":"14 3","pages":"162-172"},"PeriodicalIF":2.6,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/a7/ef/jap-14-162.PMC9259346.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40537495","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}

{"title":"Biomechanical evaluations of the long-term stability of dental implant using finite element modeling method: a systematic review.","authors":"Seyed Aref Hosseini-Faradonbeh,&nbsp;Hamid Reza Katoozian","doi":"10.4047/jap.2022.14.3.182","DOIUrl":"https://doi.org/10.4047/jap.2022.14.3.182","url":null,"abstract":"<p><strong>Purpose: </strong>The aim of this study is to summarize various biomechanical aspects in evaluating the long-term stability of dental implants based on finite element method (FEM).</p><p><strong>Materials and methods: </strong>A comprehensive search was performed among published studies over the last 20 years in three databases; PubMed, Scopus, and Google Scholar. The studies are arranged in a comparative table based on their publication date. Also, the variety of modeling is shown in the form of graphs and tables. Various aspects of the studies conducted were discussed here.</p><p><strong>Results: </strong>By reviewing the titles and abstracts, 9 main categories were extracted and discussed as follows: implant materials, the focus of the study on bone or implant as well as the interface area, type of loading, element shape, parts of the model, boundary conditions, failure criteria, statistical analysis, and experimental tests performed to validate the results. It was found that most of the studied articles contain a model of the jaw bone (cortical and cancellous bone). The material properties were generally derived from the literature. Approximately 43% of the studies attempted to examine the implant and surrounding bone simultaneously. Almost 42% of the studies performed experimental tests to validate the modeling.</p><p><strong>Conclusion: </strong>Based on the results of the studies reviewed, there is no \"optimal\" design guideline, but more reliable design of implant is possible. This review study can be a starting point for more detailed investigations of dental implant longevity.</p>","PeriodicalId":51291,"journal":{"name":"Journal of Advanced Prosthodontics","volume":"14 3","pages":"182-202"},"PeriodicalIF":2.6,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/dd/0b/jap-14-182.PMC9259347.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40537497","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}

{"title":"Influence of dental implantation on bone mineral density distribution: a pilot study.","authors":"Damian Jae-Whan Lee,&nbsp;Eun-Sang Moon,&nbsp;Kenneth Stephen,&nbsp;Jie Liu,&nbsp;Do-Gyoon Kim","doi":"10.4047/jap.2022.14.3.143","DOIUrl":"https://doi.org/10.4047/jap.2022.14.3.143","url":null,"abstract":"<p><strong>Purpose: </strong>Masticatory loading triggers active bone remodeling, altering alveolar bone mineral density (BMD). While dental implants are placed to bear masticatory loading, their influence on changing bone properties has not been fully investigated. Objective of this pilot study was to examine whether the dental implantation has an effect on BMD distribution of bone by comparing dentate, edentulous, and edentulous patients with implants.</p><p><strong>Materials and methods: </strong>Cone beam computed tomography (CBCT) images of 19 partially edentulous patients (Dent), 19 edentulous patients (Edent), and 16 edentulous patients who received implants in the mandible (Edent+Im), were obtained. CBCT images were also obtained from 5 patients within Edent+Im group, before implant placement and after implant loading. Basal cortical bone region of the mandible was digitally isolated. A histogram of gray levels proportional to BMD was obtained to assess mean, histogram standard deviation (HSD), fifth percentile of low and high values (Low₅ and High₅) of the BMD distribution. Multivariate analysis of variance and paired t-test were used to compare the BMD parameters among the 3 dental status groups and between pre- and post-implantation, respectively.</p><p><strong>Results: </strong>Edentulous patients with implants had significantly greater HSD and High₅ values compared to edentulous patients (<i>P</i> < .013). All other comparisons were not significant (<i>P</i> > .097). Mean, HSD, and High₅ values significantly increased after receiving implants (<i>P</i> < .022).</p><p><strong>Conclusion: </strong>The current findings suggested that receiving dental implants promoted oral bone mineralization for edentulous patients. The longitudinal investigation could provide valuable information on understanding the effects of implantation on the behavior of oral bone quality.</p>","PeriodicalId":51291,"journal":{"name":"Journal of Advanced Prosthodontics","volume":"14 3","pages":"143-149"},"PeriodicalIF":2.6,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/be/7a/jap-14-143.PMC9259350.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40537494","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}

{"title":"Comparative analysis on intaglio surface trueness, wear volume loss of antagonist, and fracture resistance of full-contour monolithic zirconia crown for single-visit dentistry under simulated mastication.","authors":"Yong-Kyu Kim,&nbsp;Hyung-In Yoon,&nbsp;Dae-Joon Kim,&nbsp;Jung-Suk Han","doi":"10.4047/jap.2022.14.3.173","DOIUrl":"https://doi.org/10.4047/jap.2022.14.3.173","url":null,"abstract":"<p><strong>Purpose: </strong>This analysis aimed to evaluate the intaglio surface trueness, antagonist's wear volume loss, and fracture resistance of full-contour crowns of (Y, Nb)-stabilized fully-sintered zirconia (FSZ), 4 mol% or 5 mol% yttria-stabilized partially sintered zirconia (4YZ or 5YZ) with high-speed sintering.</p><p><strong>Materials and methods: </strong>A total of 42 zirconia crowns were separated into three groups: FSZ, 4YZ, and 5YZ (n = 14). The intaglio surface trueness of the crowns was evaluated at the inner surface, occlusal, margin, and axial areas and reported as root-mean-square, positive and negative average deviation. Half of the specimens were aged for 120,000 cycles in the chewing simulator, and the wear volume loss of antagonist was measured. Before and after chewing, the fracture load was measured for each group. The trueness values were analyzed with Welch's ANOVA, and the wear volume loss with the Kruskal-Wallis tests. Effect of the zirconia type and aging on fracture resistance of crowns was tested using two-way ANOVA.</p><p><strong>Results: </strong>The intaglio surface trueness measured at four different areas of the crown was less than 50 µm, regardless of the type of zirconia. No significant <i>P</i> in wear volume loss of antagonists were detected among the groups (<i>P</i> > .05). Both the type of zirconia and aging showed statistically significant effects on fracture resistance (<i>P</i> < .05).</p><p><strong>Conclusion: </strong>The full-contour crowns of FSZ as well as 4YZ or 5YZ with high-speed sintering were clinically acceptable, in terms of intaglio surface trueness, antagonist's wear volume loss, and fracture resistance after simulated mastication.</p>","PeriodicalId":51291,"journal":{"name":"Journal of Advanced Prosthodontics","volume":"14 3","pages":"173-181"},"PeriodicalIF":2.6,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/6c/48/jap-14-173.PMC9259349.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40618504","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}