The International journal of prosthodontics最新文献

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Replacement Implant-Retained Ear Prosthesis Using Semi-Digital Workflow: A Case Report. 使用半数字化工作流程更换植入物固定的耳假体:病例报告。
The International journal of prosthodontics Pub Date : 2024-09-27 DOI: 10.11607/ijp.9021
Ceyda Başak İnal, Umut Berk Can Ayten, Seçil Karakoca Nemli
{"title":"Replacement Implant-Retained Ear Prosthesis Using Semi-Digital Workflow: A Case Report.","authors":"Ceyda Başak İnal, Umut Berk Can Ayten, Seçil Karakoca Nemli","doi":"10.11607/ijp.9021","DOIUrl":"https://doi.org/10.11607/ijp.9021","url":null,"abstract":"<p><p>Defects in the facial region can be treated by maxillofacial prostheses however, fabrication of the prosthesis is a time-consuming process. The short lifetime of silicone material due to inherent deterioration has stimulated a search for more practical methods. This case report involves a semi-digital workflow for replacement of an ear prosthesis. The existing contralateral intact ear and retentive bar of the existing prosthesis were scanned using an intraoral scanner. Resin models of the bar and the mirror image of the ear were fabricated using a 3D printer and wax replicas were obtained using silicone impression material. This method was successful, time-saving, and comfortable for the clinician and patient.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142335566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Chewing Side Preference Related to Food Texture and Occlusal Contact Area. 咀嚼侧偏好与食物质地和咬合接触面积有关。
The International journal of prosthodontics Pub Date : 2024-09-27 DOI: 10.11607/ijp.8584
Seung-Seok Chi, Kyung-Ho Ko, Yoon-Hyuk Huh, Lee-Ra Cho, Chan-Jin Park
{"title":"Chewing Side Preference Related to Food Texture and Occlusal Contact Area.","authors":"Seung-Seok Chi, Kyung-Ho Ko, Yoon-Hyuk Huh, Lee-Ra Cho, Chan-Jin Park","doi":"10.11607/ijp.8584","DOIUrl":"10.11607/ijp.8584","url":null,"abstract":"<p><strong>Purpose: </strong>To determine whether food texture affects chewing side preference (CSP) and to investigate the relationship between CSP and masticatory factors, such as occlusal contact area, bite force, and masticatory performance.</p><p><strong>Materials and methods: </strong>Forty-seven adults (20 women and 27 men; mean age: 24 years) participated in this study. Three types of food (chewing gum, beef jerky, and peanuts) were provided to assess CSP. Occlusal contact area was measured at various ranges of interocclusal distance, and the bite force was measured. Masticatory performance was assessed according to the median particle size. Asymmetry indices of each measurement were calculated and analyzed using Pearson correlation coefficient (α &#61; .05).</p><p><strong>Results: </strong>The CSP for beef jerky and peanuts were significantly correlated with each other, whereas the CSP for chewing gum was not correlated with other food. The proportion of participants who chewed equally on both sides was higher for chewing gum than for beef jerky. There was a significant correlation between the CSP for beef jerky and occlusal contact area, especially at interocclusal distance ranges of 0 to 89 μm and 0 to 109 μm (r &#61; 0.41). Bite force and masticatory performance were not significantly correlated with CSP.</p><p><strong>Conclusions: </strong>Food texture seemed to affect CSP, and masticatory laterality was greater for tough foods. Moreover, CSP for tough food was closely related to the occlusal contact area at an interocclusal distance level of about 0.1 mm.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"532-539"},"PeriodicalIF":0.0,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139907255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
INFLUENCE OF ABUTMENT MATERIAL, CEMENT THICKNESS, AND CROWN TYPE ON THE FINAL COLOR OF IMPLANT-SUPPORTED RESTORATIONS. 基台材料、骨水泥厚度和牙冠类型对种植体支持修复体最终颜色的影响。
The International journal of prosthodontics Pub Date : 2024-09-27 DOI: 10.11607/ijp.8564
Hamiyet Kilinc, Fatma Ayse Sanal
{"title":"INFLUENCE OF ABUTMENT MATERIAL, CEMENT THICKNESS, AND CROWN TYPE ON THE FINAL COLOR OF IMPLANT-SUPPORTED RESTORATIONS.","authors":"Hamiyet Kilinc, Fatma Ayse Sanal","doi":"10.11607/ijp.8564","DOIUrl":"10.11607/ijp.8564","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the influence of abutment material, cement thickness, and crown type on the esthetics of implant supported restorations.</p><p><strong>Material and methods: </strong>In total, 60 specimens were prepared to represent six abutment groups: Group PA &#61; pink-anodized Ti; Group GA &#61; gold-anodized Ti; Group T &#61; nonanodized Ti; Group H &#61; hybrid (Ti &#43; zirconia); Group P &#61; PEEK (Ti &#43; PEEK); and Group C &#61; composite resin (control). Crown specimens (n &#61; 120) were obtained from Vita Enamic (VE) and Vita Suprinity (VS). Two cement thicknesses (0.1 and 0.2 mm) were used. The color values of crown configura:ons were measured and ΔE00* values were calculated. Statistical analyses included were Shapiro Wilk, three-way ANOVA, and Tukey HSD tests (P ≤ .05).</p><p><strong>Results: </strong>Abutment (P < .001) and crown materials (P &#61; .001) had a significant effect on ΔE00* values, while cement thickness did not. Groups PA and H resulted in significantly lower mean ΔE00* values than other abutments, whereas Group T revealed the highest. Unlike VS, cement thicknesses created a significant difference on the ΔE00* values for VE (P ≤.05).</p><p><strong>Conclusions: </strong>Pink-anodized Ti or hybrid abutments for VE and pink- or goldanodized Ti for VS seem to be better options, in terms of color change. Cement thickness of 0.1 mm resulted in higher ΔE00* value than 0.2 mm for VE (P ≤ .05).</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"37 5","pages":"211-222"},"PeriodicalIF":0.0,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142335569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of Implant ScanBody Material and Intraoral Scanners on the Accuracy of Complete-Arch Digital Implant Impressions. 种植体扫描体材料和口腔内扫描仪对全弓数字种植体印模精度的影响。
The International journal of prosthodontics Pub Date : 2024-09-27 DOI: 10.11607/ijp.8565
Luís Azevedo, Tiago Marques, Duygu Karasan, Vincent Fehmer, Irena Sailer, André Correia, Miguel Gómez Polo
{"title":"Influence of Implant ScanBody Material and Intraoral Scanners on the Accuracy of Complete-Arch Digital Implant Impressions.","authors":"Luís Azevedo, Tiago Marques, Duygu Karasan, Vincent Fehmer, Irena Sailer, André Correia, Miguel Gómez Polo","doi":"10.11607/ijp.8565","DOIUrl":"10.11607/ijp.8565","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the accuracy of complete-arch digital implant impressions using different intraoral scan body (ISB) materials and intraoral scanners (IOSs).</p><p><strong>Materials and methods: </strong>The mandibular dental cast of an edentulous patient with six tissue-level dental implants was used as the master cast. Two types of ISBs-polyether ether ketone (PEEK) and plasma-coated medical titanium-were used with five IOSs: TRIOS 4 (T4), Virtuo Vivo (VV), Medit i700 (Mi700), iTero 5D (i5D), and Primescan (PS). To assess accuracy, digital impressions (n &#61; 10) with each IOS and ISB were compared to two reference models obtained by digitizing the master cast with each ISB type using a desktop scanner (IScan4D LS3i) and importing the scan data into metrology software (Geomagic Control X). Root mean square (RMS) error was employed to evaluate overall deviation values (trueness), while precision was determined using the SD of RMS values. Statistical significance was set at P < .05. Kruskal-Wallis test was used, followed by the pairwise comparison method with Bonferroni correction (α &#61; .05).</p><p><strong>Results: </strong>An interaction between ISB material and IOS was found (P &#61; .001). Plasma-coated medical titanium ISBs demonstrated significantly higher trueness and precision compared to PEEK ISBs with T4 (P &#61; .001), Mi700 (P &#61; .001; P &#61; .004), and i5D (P &#61; .001). Conversely, VV exhibited higher trueness and precision values with PEEK ISBs (P &#61; .005; P &#61; .003). PS provided the highest trueness and precision regardless of the ISB material (P &#61; .912). T4 showed the lowest accuracy for PEEK ISBs, and VV showed the lowest accuracy for plasma-coated medical titanium ISBs.</p><p><strong>Conclusions: </strong>Except for PS, all IOSs showed significant differences between ISB materials. PS demonstrated the highest accuracy with both ISB materials, whereas T4 had the lowest accuracy for PEEK ISBs, and VV showed the lowest accuracy for plasma-coated medical titanium ISBs.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"575-582"},"PeriodicalIF":0.0,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41159794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Psychosocial and Behavioral Impact of Three Clinical Presentations of Oligodontia in a Tertiary Hospital. 某三级医院少齿症三种临床表现的社会心理和行为影响
The International journal of prosthodontics Pub Date : 2024-09-27 DOI: 10.11607/ijp.8554
Wendy Nicholls, Steven Singer
{"title":"Psychosocial and Behavioral Impact of Three Clinical Presentations of Oligodontia in a Tertiary Hospital.","authors":"Wendy Nicholls, Steven Singer","doi":"10.11607/ijp.8554","DOIUrl":"10.11607/ijp.8554","url":null,"abstract":"<p><strong>Purpose: </strong>To investigate the psychosocial and behavioral impact of oligodontia across three presentation types and determine if presentation type can infer impact.</p><p><strong>Materials and methods: </strong>Thirty patients who had been diagnosed and treated for oligodontia between 2006 and 2021 were identified from hospital records. Patients received two questionnaires: (1) a modified version of a condition-specific questionnaire- the Cleft Research Questionnaire (CRQ), used to investigate demographic, life, and treatment details and impacts-and (2) the Oral Health Impact Profile (OHIP-14), used to investigate the oral health-related quality of life. Patients were assigned to three presentations (Types 1 to 3) of oligodontia, identified according to the edentulous space present and complexity of prosthodontic treatment required. The hypothesis that there is a relationship between oligodontia type and study variables was tested.</p><p><strong>Results: </strong>Twenty-two questionnaires were completed and returned. There were 13 men and 9 women. The age range was from 16 to 32 years. In total, 18 patients had nonsyndromic oligodontia and 4 had oligodontia associated with anhidrotic ectodermal dysplasia (AED). The main areas of impact were patient-reported: life less satisfying (64.5%, n &#61; 14; pretreatment), making friends (45%, n &#61; 10), school participation (45%, n &#61; 10), and public speaking (45%, n &#61; 10). No relationship was discovered between the degree of physical effect of the presentation type and study variables, including the degree of psychosocial impact or life satisfaction.</p><p><strong>Conclusions: </strong>Oligodontia can have a negative functional and social impact on a patient prior to prosthodontic treatment. Prosthodontic treatment improved the life satisfaction for most patients. Psychosocial outcomes could not be inferred by the presentation type of oligodontia.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"518-525"},"PeriodicalIF":0.0,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138292678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
INFLUENCE OF CERAMIC MATERIALS AND PREPARATION DESIGNS ON THE MARGINAL ADAPTATION OF INLAYS AND ONLAYS AFTER THERMOCYCLING. 陶瓷材料和制备设计对热循环后镶嵌和镶嵌边缘适应的影响。
The International journal of prosthodontics Pub Date : 2024-09-27 DOI: 10.11607/ijp.8504
Mahmoud Attia, Aya A Salama
{"title":"INFLUENCE OF CERAMIC MATERIALS AND PREPARATION DESIGNS ON THE MARGINAL ADAPTATION OF INLAYS AND ONLAYS AFTER THERMOCYCLING.","authors":"Mahmoud Attia, Aya A Salama","doi":"10.11607/ijp.8504","DOIUrl":"10.11607/ijp.8504","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate inlay and onlay marginal adaptation of two different ceramic materials using two intracoronal preparation designs.</p><p><strong>Materials and methods: </strong>An examination of the marginal adaptation of two materials-lithium disilicate (LD; IPS e.max CAD) and polymer infiltrated ceramic network material (PICN; Vita Enamic)-and two preparation designs, where D1 represents MOD inlay preparation with no cusp reduction and for D2, in addition to the basic MOD preparation, the buccal cusps (functional cusps) were reduced by 1.5 mm. Four sub-groups (LD-D1, LD-D2, PICN-D1, PICN-D2) were conducted. In total, 40 (n &#61; 40) mandibular molars were used. A stereomicroscope was used to assess the marginal gap before, after cementation and after thermocycling. Values were calculated for the mean, median, SD, minimum, maximum, and 95% CI. Pairwise comparisons using Tukey post-hoc test were performed following an ANOVA significance of P ≤ .05.</p><p><strong>Results: </strong>The results revealed that lithium disilicate showed statistically significantly higher mean gap distance than PICN material (61 μm to 99 μm). Pairwise comparisons showed that D2 design has statistically significant higher mean gap values than D1.</p><p><strong>Conclusions: </strong>Both LD and PICN material provided marginal adaptation within clinical accepted range. PICN material restorations provided better fit than lithium disilicate restorations. Cusp coverage has a greater marginal gap compared to conventional preparation.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"200-210"},"PeriodicalIF":0.0,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41224449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Hydrogen Peroxide-Based Bleaching Agents on the Color Dimensions and Surface Roughness of Different Milled Restorative Dental Materials. 过氧化氢漂白剂对不同研磨修复牙科材料颜色尺寸和表面粗糙度的影响
The International journal of prosthodontics Pub Date : 2024-09-27 DOI: 10.11607/ijp.8539
Jaime Velasco Luque, Álvaro Zubizarreta-Macho, José F Bartolomé, John C Kois, Marta Revilla-León
{"title":"Effect of Hydrogen Peroxide-Based Bleaching Agents on the Color Dimensions and Surface Roughness of Different Milled Restorative Dental Materials.","authors":"Jaime Velasco Luque, Álvaro Zubizarreta-Macho, José F Bartolomé, John C Kois, Marta Revilla-León","doi":"10.11607/ijp.8539","DOIUrl":"https://doi.org/10.11607/ijp.8539","url":null,"abstract":"<p><strong>Purpose: </strong>To compare the color dimensions, color discrepancies (ΔE00), and surface roughness of milled materials before and after application of a bleaching agent.</p><p><strong>Materials and methods: </strong>A total of 10 extracted molars were obtained. Each tooth was cut in transverse sections to create disks (3-mm thick, 10-mm diameter; control group). Disk specimens of eight materials (n &#61; 10 per group) were fabricated: polymethyl methacrylate (PMMA) interim material (PMMA-Telio group), two resin nanoceramics (RNC-Ultimate group and RNC-Cerasmart group), two hybrid ceramics (HC-Shofu group and HC-Enamic group), lithium disilicate (LD-Emax group), zirconia-reinforced glass ceramic (ZGC-Suprinity group), and zirconia (Zr-InCeram group). Color measurements were obtained using a spectrophotometer before and after applying 35% hydrogen peroxide-based bleaching agent. Pre- and postbleaching surface roughness (Sa) analyses were completed using a profilometer.</p><p><strong>Results: </strong>Significant L*, a*, b*, and ΔE00 value differences were found (P < .05). Color discrepancies (ΔE00) ranged from 0.30 ± 0.14 to 4.82 ± 0.10. The highest color discrepancies were measured on the PMMA-Telio group, while the lowest color discrepancies were computed for ZGC-Suprinity, RNCUltimate, and RNC-Cerasmart. Significant surface roughness differences were found (P < .05). The largest increase of surface roughness values between the pre- and postbleaching measurements was obtained in the PMMA-Telio group with a mean ΔSa value of 4.73 ± 3.02, while the largest decrease of surface roughness values between the pre- and postbleaching measurements was obtained in the Zr-InCeram group with a mean ΔSa value of -1.58 ± 0.10.</p><p><strong>Conclusions: </strong>The milled materials showed significant pre- and postbleaching color and surface roughness discrepancies.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"37 5","pages":"547-558"},"PeriodicalIF":0.0,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142335568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Comparison of Occlusal Schemes with Condylar Inclination and Anterior Guidance in Dentate Individuals. 咬合方案与髁突倾斜和前方引导在义齿患者中的比较。
The International journal of prosthodontics Pub Date : 2024-09-27 DOI: 10.11607/ijp.8516
Mayank Kumar Parakh, Krishna Prasad D, Chethan Hegde
{"title":"A Comparison of Occlusal Schemes with Condylar Inclination and Anterior Guidance in Dentate Individuals.","authors":"Mayank Kumar Parakh, Krishna Prasad D, Chethan Hegde","doi":"10.11607/ijp.8516","DOIUrl":"10.11607/ijp.8516","url":null,"abstract":"<p><strong>Purpose: </strong>To compare occlusal schemes with condylar inclination and anterior guidance in dentate individuals.</p><p><strong>Materials and methods: </strong>A total of 26 dentate patients of Indian origin between the ages of 18 and 30 with canine-guided occlusion and 26 patients with group function occlusion were included in the study. The School of Articulator Munich (SAM) Axioquick system was used to assess the condylar guidance and eccentric tracings of the patients. For analyses, Student t test was used. For quantitative data, the means and SDs were calculated. For statistical analyses, the probability of type-I error of .05 was considered statistically significant.</p><p><strong>Results: </strong>The mean condylar guidance for canine-guided and group function occlusion was 38.4 ± 12.7 degrees and 30.5 ± 12.5 degrees on the right side, respectively. On the left side it was 36.5 ± 13.0 degrees and 27.5 ± 12.0 degrees for canine-guided and group function occlusion, respectively, with a statistically significant difference (P &#61; .01). The condylar guidance, incisal guidance, Bennett angle, protrusion, left lateral and right lateral movement, and left and right lateral angles were analyzed statistically between the two types of occlusions. The results showed a statistically significant difference between the two groups for all parameters except right condylar guidance. Furthermore, all parameters were higher in the canine-guided occlusion group over group function occlusion.</p><p><strong>Conclusions: </strong>Within the study limitations, it was concluded that the condylar guidance was steeper in canine-guided occlusion than in group function occlusion. The eccentric parameters were steeper in canine-guided occlusion than in group function occlusion. This study showcases that the condylar guidance might not play a major role in determining the occlusal scheme but that the incisal guidance determines the occlusal scheme predominantly in Class 1 occlusion patients.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"505-511"},"PeriodicalIF":0.0,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41224429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
IN VITRO SURVIVAL AND FRACTURE FORCE OF LITHIUM DISILICATE HYBRID ABUTMENT CROWNS. 二硅酸锂复合基台牙冠的体外存活和断裂力。
The International journal of prosthodontics Pub Date : 2024-09-27 DOI: 10.11607/ijp.8548
Tobias Graf, Elisabeth Völler, Josef Schweiger, Michael Stimmelmayr, Jan-Frederik Güth, Kurt-Jürgen Erdelt
{"title":"IN VITRO SURVIVAL AND FRACTURE FORCE OF LITHIUM DISILICATE HYBRID ABUTMENT CROWNS.","authors":"Tobias Graf, Elisabeth Völler, Josef Schweiger, Michael Stimmelmayr, Jan-Frederik Güth, Kurt-Jürgen Erdelt","doi":"10.11607/ijp.8548","DOIUrl":"10.11607/ijp.8548","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the behavior of hybrid abutment crowns fabricated from monolithic lithium disilicate ceramic (LDC) and to compare the influence of different in vitro artificial aging protocols.</p><p><strong>Materials and methods: </strong>A total of 32 monolithic hybrid abutment crowns of monolithic LDC were fabricated. Of these, 24 were artificially aged using three different protocols up to a 20 year simulation (1.2 × 106, 2.4 × 106, 4.8 × 106 chewing cycles, thermocycling), a control group underwent no artificial aging (n &#61; 8, N &#61; 32). Load-to-failure tests were conducted for all specimens, and failure values were compared (P < .05).</p><p><strong>Results: </strong>All specimens passed in vitro aging. Mean failure load values between 532.6 and 562.8 N were found but did neither differ significantly among the test groups nor from the control group.</p><p><strong>Conclusions: </strong>Within the limitations of this in vitro pilot study, hybrid abutment crowns manufactured from monolithic LDC seem to offer appropriate long-lasting mechanical stability over a simulation period up to 20 years. The failure values and complication pattern seem to be independent of several aging protocols in this test set-up.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"223-227"},"PeriodicalIF":0.0,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41127411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparative Evaluation of Masticatory Efficiency in Various Facial Forms of Dentate and Rehabilitated Complete Denture Patients. 牙齿和修复后全口义齿患者不同面部形态咀嚼效率的比较评估。
The International journal of prosthodontics Pub Date : 2024-08-23 DOI: 10.11607/ijp.8433
Radhika Krishnan C, K N Swamy, Sujatha P, Meenakshi S, Anupama Aradya
{"title":"Comparative Evaluation of Masticatory Efficiency in Various Facial Forms of Dentate and Rehabilitated Complete Denture Patients.","authors":"Radhika Krishnan C, K N Swamy, Sujatha P, Meenakshi S, Anupama Aradya","doi":"10.11607/ijp.8433","DOIUrl":"10.11607/ijp.8433","url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the masticatory efficiency of dentate and rehabilitated complete denture patients in various facial forms.</p><p><strong>Materials and methods: </strong>A total of 60 subjects were selected for the study; 30 subjects belonged to the dentate group (D Group) and 30 subjects belonged to the completely edentulous group rehabilitated with conventional complete dentures (CECD Group). All patients were divided into a subgroup (brachyfacial, mesofacial, and dolichofacial facial forms) using facial index measurement and cephalometric analysis. After the subjects were divided into groups, masticatory efficiency testing was performed with spectrophotometric analysis using diluted expectorate of chewed natural beetroot test food (10, 15, and 20 strokes). The mean absorbance value was considered as the mean masticatory efficiency from which the average masticatory efficiency percentage was determined using a masticatory efficiency percentage equation and considered as the masticatory efficiency of that particular subject.</p><p><strong>Results: </strong>Statistical analysis revealed that in the D Group, brachyfacial subjects exhibited the highest masticatory efficiency (70.9 ± 12.64%), followed by mesofacial (60.6% ± 10.66%) and dolichofacial (34.3% ± 10.81%) subjects. In the CECD groups, the results for brachyfacial were highest (52.7% ± 8.11%), followed by the mesofacial (42.3% ± 6.52%), and dolichofacial (29.3% ± 7.76%) subjects.</p><p><strong>Conclusions: </strong>Along with other determinant factors, facial form plays an influential role on masticatory efficiency. Brachyfacial subjects exhibited the highest masticatory efficiency, followed by mesofacial and dolichofacial subjects in both study groups.</p>","PeriodicalId":94232,"journal":{"name":"The International journal of prosthodontics","volume":"0 0","pages":"375-385"},"PeriodicalIF":0.0,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41224431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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