The Journal of Indian Prosthodontic Society最新文献

{"title":"Accuracy of master casts fabricated for \"all on 4\" and \"all on 6\" implant situation in maxillary arch as influenced by the number of digital scan bodies: An in vitro comparative study.","authors":"Shailja Narendra Sharda, Ajay V Sabane, Rajashree D Jadhav, Seema S Patil, Vasanthi V Swami, Bhagyashree G Kalsekar","doi":"10.4103/jips.jips_265_25","DOIUrl":"10.4103/jips.jips_265_25","url":null,"abstract":"<p><strong>Aim: </strong>The aim of this study was to evaluate the effect of the number of intraoral scan bodies (ISBs) on the accuracy of digital impressions and the resulting master casts in full-arch maxillary implant rehabilitations in \"all-on-4\" and \"all-on-6\" situations.</p><p><strong>Settings and design: </strong>This was an in vitro comparative study.</p><p><strong>Materials and methods: </strong>Forty-two digital impressions were obtained for all-on-4 (Group A) and all-on-6 (Group B) implant situations. Group A had three scan situations-1, 2, and 3-using 1, 2, and 4 scan bodies, respectively. Group B had four scan situations-1, 2, 3, and 4-employing 1, 2, 4, and 6 scan bodies, respectively, with six scans per situation. Linear and angular measurements were digitally evaluated by superimposing STL files onto reference models using Geomagic Control X. One master cast was fabricated for each scan situation, and verification jigs were assessed for passivity and fit.</p><p><strong>Statistical analysis used: </strong>Data were analyzed using the Shapiro-Wilk test to confirm normal distribution, followed by one-sample t-test for comparison of linear and angular deviations between scan and reference models (p < 0.05).</p><p><strong>Results: </strong>In Group A, regardless of the scan situation, the differences in the measurements between the scan and reference model were statistically significant. In Group B, the study showed that scan situation 4 yielded the most accurate measurements when compared with reference model (P = 0.136). In both Groups A and B, master models fabricated using four and six scan bodies, respectively, exhibited the best passive fit of the verification jig.</p><p><strong>Conclusion: </strong>Within the limitations of this study, scan body quantity significantly influenced digital impression accuracy in full-arch implant prosthodontics. All-on-4 achieved reliable results with two ISBs but benefited from four for angular accuracy, while all-on-6 required six ISBs for optimal trueness and passive fit, underscoring their importance in complex rehabilitations.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"26 1","pages":"14-23"},"PeriodicalIF":1.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12912522/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145879204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative evaluation of infrasinus residual ridge height in cone-beam computed tomography and on-site measurements during indirect sinus lift osteotomy: An observational study.","authors":"Mallikarjuna Ragher, Sanath Kumar Shetty, Rajesh Shetty, Savitha Dandekeri, Nafiya Abdul Aziz, M Sunaina","doi":"10.4103/jips.jips_393_25","DOIUrl":"10.4103/jips.jips_393_25","url":null,"abstract":"<p><strong>Aim: </strong>To compare infra-sinus residual ridge height measured preoperatively using Cone-Beam Computed Tomography (CBCT) with intraoperative measurements recorded during indirect sinus lift osteotomy using the Crestal Approach Sinus (CAS) kit, and to evaluate the reliability of CBCT in posterior maxillary implant planning.</p><p><strong>Settings and design: </strong>This prospective observational clinical study was conducted on participants requiring implant rehabilitation in the posterior maxilla.</p><p><strong>Materials and methods: </strong>Fifty participants indicated for implant placement in the posterior maxilla were included. Infra-sinus residual ridge height was measured preoperatively on CBCT scans using Planmeca Romexis® software. Intraoperative measurements were recorded during indirect sinus lift osteotomy using a depth gauge from the CAS kit. Preoperative CBCT measurements were compared with intraoperative findings.</p><p><strong>Statistical analysis used: </strong>Statistical analysis was performed using Jamovi version 2.3.28 software. The Shapiro-Wilk test was applied to assess the normality of numerical variables. As the data were non-normally distributed, the Wilcoxon signed-rank test was used to determine the significance of differences between CBCT and intraoperative measurements. A p-value <0.05 was considered statistically significant.</p><p><strong>Results: </strong>The mean infra-sinus residual ridge height measured on CBCT was 4.66 ± 0.798 mm, while the mean intraoperative measurement was 6.50 ± 1.074 mm. The difference between the two measurement methods was statistically significant (p < 0.001), indicating a consistent underestimation of ridge height by CBCT.</p><p><strong>Conclusion: </strong>CBCT consistently underestimates infra-sinus residual ridge height by approximately 1.86 mm when compared with intraoperative measurements. Although CBCT remains indispensable for pre-surgical planning, reliance on CBCT alone may be insufficient for sinus lift procedures, particularly in borderline cases. A dual-modality approach combining CBCT evaluation with intraoperative verification improves accuracy and safety, thereby supporting evidence-based and precise clinical decision-making.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"26 1","pages":"102-110"},"PeriodicalIF":1.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12912526/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145879137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Predictors of patient dissatisfaction with ceramic veneers: A matched case-control study.","authors":"Sagar J Abichandani, Aneendita Dutta","doi":"10.4103/jips.jips_402_25","DOIUrl":"10.4103/jips.jips_402_25","url":null,"abstract":"<p><strong>Aim: </strong>To assess the association between mock-up technique (chairside bis-acryl vs digitally fabricated 3D-printed) and shade-matching protocol (chairside visual vs laboratory-assisted/digital) with patient-initiated esthetic dissatisfaction resulting in refund or retreatment within 12 months of veneer delivery.</p><p><strong>Settings and design: </strong>Single-center, 1:1 matched case-control study (23 pairs; n = 46) in a private prosthodontic practice.</p><p><strong>Materials and methods: </strong>Exposures were chairside bis-acryl versus digitally fabricated 3D-printed mock-ups and chairside visual versus laboratory-assisted/digital shade matching. The primary outcome was patient-initiated esthetic dissatisfaction within 12 months resulting in refund or retreatment; refund-only and retreatment-only outcomes were prespecified as exploratory.</p><p><strong>Statistical analysis used: </strong>Primary analysis used exact conditional methods for matched pairs (McNemar) with exact 95% confidence intervals; in the presence of separation, the exact lower confidence bound was reported without continuity corrections. A supportive multivariable unconditional logistic regression adjusted for age, sex, exact number of units, arch, and cost tier, and E-values were calculated to assess robustness to unmeasured confounding.</p><p><strong>Results: </strong>Chairside mock-ups and chairside-only shade selection were more frequent in cases than controls. The matched odds ratio (OR) for chairside versus digitally fabricated mock-ups was ∞ (exact lower 95% confidence interval ≥2.51; P = 0.0010), and for chairside versus laboratory-assisted/digital shade matching was 6.00 (95% confidence interval 1.34-55.20; P = 0.0129). In the supportive adjusted model, the ORs were 5.87 (95% confidence interval 1.59-21.66; P = 0.008) for mock-up technique and 4.41 (1.26-15.42; P = 0.021) for shade protocol; corresponding E-values were 11.48, 11.22, and 8.29, respectively.</p><p><strong>Conclusion: </strong>Within the limitations of a retrospective, single-center design and modest sample size, chairside bis-acryl mock-ups and chairside-only shade matching were associated with higher odds of early esthetic dissatisfaction leading to refund or retreatment. Adoption of standardized digital workflows with digitally designed/3D-printed mock-ups and calibrated shade protocols is recommended as a clinical quality-assurance measure to mitigate this risk.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"26 1","pages":"96-101"},"PeriodicalIF":1.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12912501/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145879209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of dimensional accuracy between two commercially available light-activated and chemically activated acrylic resins for verification jigs in implant prosthodontics: An in vitro study.","authors":"Lokesh Sai Karanam, Amrutha Dinesh Shenoy, Ranjith Akshay Seshadri, Deepak Nallaswamy Veeraiyan","doi":"10.4103/jips.jips_244_25","DOIUrl":"10.4103/jips.jips_244_25","url":null,"abstract":"<p><strong>Aim: </strong>Verification jigs play a vital role in ensuring the passive fit of implant-supported prostheses by accurately transferring implant positions to the working cast. This in vitro study aimed to compare the dimensional accuracy of verification jigs fabricated using chemically polymerized (self-cure) and photopolymerized acrylic resin.</p><p><strong>Settings and design: </strong>In-vitro study design.</p><p><strong>Materials and methods: </strong>Sixteen three-dimensional-printed mandibular edentulous models with embedded implant analogs were used and divided into two groups (n = 8). Group A jigs were fabricated using self-cure resin (Pattern Resin™ LS, GC America), while Group B used light-cured resin (Resinlay®, TDV Dental, Brazil). All jigs were sectioned and relined to compensate for polymerization shrinkage before pouring the final working casts. The casts were scanned using a desktop optical scanner, and standard tessellation language (STL) files were superimposed onto a reference model using Geomagic Control X software. Root mean square (RMS) deviation, linear inter-implant distance deviation, and angular deviation were calculated.</p><p><strong>Statistical analysis used: </strong>Statistical comparisons were made using an independent t-test.</p><p><strong>Results: </strong>Group A and Group B demonstrated comparable RMS deviation (0.057 ± 0.003 mm vs. 0.060 ± 0.003 mm; P = 0.170), linear deviation (0.084 ± 0.003 mm vs. 0.090 ± 0.002 mm; P = 0.270), and angular deviation (1.855° ± 0.023° vs. 1.965° ± 0.061°; P = 0.148). None of the differences were statistically significant.</p><p><strong>Conclusion: </strong>Both groups provide clinically acceptable dimensional accuracy in verification jig fabrication. Resinlay, with its superior handling and reduced working time, may serve as an efficient alternative in clinical settings.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"26 1","pages":"56-62"},"PeriodicalIF":1.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12912490/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145879124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative evaluation of mechanical properties between dual-layer and bonded three-dimensional printed denture base materials: An in vitro study.","authors":"Naveen Gopi Chander, Aryan Shivaji Deshmukh, Harini Gnana Prakash, Vigneshvar Kandaswamy Srinivasan","doi":"10.4103/jips.jips_403_25","DOIUrl":"10.4103/jips.jips_403_25","url":null,"abstract":"<p><strong>Aim: </strong>The study aimed to compare the flexural strength, fracture toughness, and impact strength of the denture base materials fabricated using dual-layer and bonded 3D printing techniques.</p><p><strong>Settings and design: </strong>In vitro comparative study.</p><p><strong>Materials and methods: </strong>Seventy-two bar-shaped samples were fabricated using a digital light processing 3D printer and were divided into 2 groups (n = 36 each). Group I samples were fabricated by dual-layer technique, with the denture base and tooth-colored resins were printed sequentially in a single print cycle. Group II samples were printed separately and bonded with denture base resin. Flexural strength and fracture toughness were tested according to ISO 20795-1:2013, and impact strength was evaluated using ASTM D-256.Statistical Analysis Used: Statistical analysis comprised Shapiro-Wilk for normality, t-test for flexural strength, and Mann-Whitney U-test for fracture toughness and impact strength (α = 0.05).</p><p><strong>Results: </strong>Group I exhibited significantly higher flexural strength (82.78 ± 2.02 MPa) and fracture toughness (89.91 ± 0.53 MPa) compared to Group II (80.01 ± 2.69 MPa and 86.93 ± 2.29 MPa, respectively). Conversely, impact strength was greater in Group II (4.17 ± 0.39 J) than in Group I (3.00 ± 1.04 J) (P < .05).</p><p><strong>Conclusion: </strong>The dual-layer printing technique improved the flexural and fracture resistance of denture base materials by eliminating interfacial weaknesses. Although bonded resins exhibited higher impact strength, the structural advantages of dual-printing support its application in clinical prosthodontics.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"26 1","pages":"63-69"},"PeriodicalIF":1.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12912529/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145879149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of wear resistance in 3D printed temporary restorative material using two different printing technologies\" - An in vitro study.","authors":"Srilekha Daripalli, Mahendranadh Reddy Kareti, Y Mahadev Shastry, S Venkat Aditya, Sai Akhil Khadkekar, Divya Dubey","doi":"10.4103/jips.jips_305_25","DOIUrl":"10.4103/jips.jips_305_25","url":null,"abstract":"<p><strong>Aim: </strong>This study aimed to assess and compare the wear resistance of 3D printable crown and bridge interim resin material with two different 3D printers.</p><p><strong>Settings and design: </strong>In vitro comparative study.</p><p><strong>Materials and methods: </strong>60 specimens were divided into 2 groups and designed using nx12 (Unigraphics) software. This Standard Tessellation Language file was used to print the specimens. Specimens fabricated using Phrozen Sonic Mini 3D printer of LCD software were grouped as Group A (n = 30), and specimens fabricated using Asiga Max 3D printer of DLP software were grouped as Group B (n = 30). Surface micro roughness measurements (Ra) were noted with a profilometer prior to and following toothbrush wear simulation. The collected data were tabulated to facilitate statistical analysis.</p><p><strong>Statistical analysis used: </strong>Student's t-test and Mann-Whitney U-test was employed for multiple comparisions.</p><p><strong>Results: </strong>The Student's t-test was employed to compare the mean surface micro-roughness of Group A and Group B specimens before and after toothbrush wear simulation. The test indicated that there was no significant difference.</p><p><strong>Conclusion: </strong>Within the scope of this study, both groups underwent wear and were statistically insignificant.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"26 1","pages":"70-76"},"PeriodicalIF":1.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12912475/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145879162","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of build position on the accuracy and flexural properties of resin model materials for three-dimensional printing technologies.","authors":"Xiao-Mei Tang, Na-Yu, Bin-Ding Bai, Peng-Wang, Lu-Liu, Fa-Bing Tan","doi":"10.4103/jips.jips_106_25","DOIUrl":"10.4103/jips.jips_106_25","url":null,"abstract":"<p><strong>Aim: </strong>This study aimed to evaluate the effects of build position (rows or columns) on the accuracy and flexural properties of three-dimensional printing resin model materials.</p><p><strong>Settings and design: </strong>This was a comparative experimental study.</p><p><strong>Materials and methods: </strong>Three additive manufacturing technologies - digital light processing (DLP), stereolithography (SLA), and polymer jetting printing (PJP) - were employed to fabricate resin model specimens (2 mm × 2 mm × 25 mm), arranged evenly in 7 rows and 7 columns on the build platform. Dimensional trueness was assessed by measuring deviations in length (X-axis), width (Y-axis), and height (Z-axis) using a digital micrometer. Triplicate printing runs were performed to determine precision, quantified using intraclass correlation coefficient analysis. Flexural properties were evaluated through three-point bending tests.</p><p><strong>Statistical analysis used: </strong>Data were analyzed using one-way ANOVA followed by Tukey post hoc tests.</p><p><strong>Results: </strong>The PJP group exhibited deviations in length (0.18-0.25 mm) and height (0.18-0.22 mm) at several column positions, exceeding 0.1 mm, whereas the DLP and SLA groups showed deviations in all dimensions within 0.1 mm. At different row positions, PJP length (0.20-0.24 mm) and height (0.17-0.22 mm) deviations also exceeded 0.1 mm. Precision in height was lower than in length or width across both rows and columns (P = 0.000). Compared with the DLP and PJP groups, the SLA group demonstrated larger deviations in flexural modulus at column positions (P = 0.003, H = 19.730) and greater variations (95% confidence interval) in flexural strength and modulus at column and row positions.</p><p><strong>Conclusion: </strong>Build position had a greater influence on trueness in the PJP group, while precision was lowest for height across all three groups. Furthermore, the flexural strength and modulus of the SLA group varied more significantly with build position. Thus, meticulous selection of the build position is essential to achieve improved accuracy and flexural properties in resin models.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"26 1","pages":"32-42"},"PeriodicalIF":1.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12912485/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145879189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Survival rate of immediate functionally loaded ball-attachment mini-implants retaining mandibular overdentures: A systematic review.","authors":"Heba M Moftah, Mohannad H Al-Saadi","doi":"10.4103/jips.jips_361_25","DOIUrl":"10.4103/jips.jips_361_25","url":null,"abstract":"<p><strong>Aim: </strong>Immediate loading protocols are frequently applied when placing mini-implants (MIs), although many of these may not be functional loading. Data on immediately functionally loaded MIs are limited. Therefore, this systematic review aimed to answer the question: What is the survival rate (SR) of immediately functionally loaded MIs placed in the edentulous mandible to retain a complete mandibular overdenture?</p><p><strong>Settings and design: </strong>Studies published in peer-reviewed journals up to April 2025 were considered.</p><p><strong>Material and methods: </strong>An electronic search was conducted using MeSH terms and free-text search in April 2025 across Web of Science, PubMed, Cochrane Central, EBSCOhost, and ScienceDirect. Eligible criteria included case-control studies, retrospective and prospective case series, cohort studies, clinical trials, and randomized controlled trials.</p><p><strong>Statistical analysis used: </strong>Not applicable.</p><p><strong>Results: </strong>Out of 1854 identified references, seven studies met the inclusion criteria, three randomized controlled and four prospective case series. A total of 496 immediately functionally loaded MIs were placed in 124 patients. The diameters of MIs were 1.8, 2.0, 2.1, 2.2, and 2.4 mm. Within the 1st year, 16 out of 495 MIs failed, resulting in a 1-year SR of 96.77%. A 24-month SR of 94.4% was reported by three studies, and a 36-month rate of 94.77% was reported by two studies.</p><p><strong>Conclusions: </strong>Current evidence indicates that immediately functionally loaded MIs are a promising option for retaining mandibular overdentures, with a high 1-year SR of 96.77%. However, the limited number of included studies and relatively short follow-up periods highlight the need for further well-designed, long-term research to validate these findings.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"26 1","pages":"3-13"},"PeriodicalIF":1.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12912488/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145879127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of cathodic arc plasma spraying on shear bond strength between polyether ether ketone and maxillofacial silicone after accelerated aging - An in vitro study.","authors":"Ganesh Ramkumar Rajapandi, Ahila Singaravel Chidambaranathan, Muthukumar Balasubramanium","doi":"10.4103/jips.jips_203_25","DOIUrl":"https://doi.org/10.4103/jips.jips_203_25","url":null,"abstract":"<p><strong>Aim: </strong>To evaluate and compare the shear bond strength between polyether ether ketone (PEEK) and maxillofacial silicone after cathodic arc plasma spraying and accelerated aging.</p><p><strong>Settings and design: </strong>An in vitro study.</p><p><strong>Materials and methods: </strong>According to ISO 10477:2020, 72 PEEK specimens were fabricated using computer-aided design/computer-aided manufacturing with 10-mm diameter and 3-mm thickness, and the silicone specimens were made with 5-mm diameter with 2.5-mm height. The specimens were categorized into Group 1 - No surface treatment, Group 2 - Cathodic arc plasma spraying, and Group 3 - Primer application. The silicone specimens were bonded to PEEK and subjected to accelerated aging for 252 and 504 h. The shear bond strength was performed using a universal testing machine at 1 mm/min crosshead speed.</p><p><strong>Statistical analysis used: </strong>One-way ANOVA, Tukey HSD test, and Student's t-test, where P < 0.5 was set as significant.</p><p><strong>Results: </strong>PEEK specimens subjected to primer application exhibited highest shear bond strength of 19.22 ± 0.35 Mpa, 18.55 ± 0.60 Mpa, 18.14 ± 0.65 Mpa, followed by cathodic arc plasma spraying 14.71 ± 0.28 Mpa, 13.54 ± 0.42 Mpa, 12.46 ± 0.48 Mpa after 24 h of fabrication, 252 h, and 504 h of aging and the least shear bond strength exhibited by control 4.98 ± 0.32, Mpa, 4.52 ± 0.33 Mpa, 4.2 ± 0.39 Mpa, respectively. The significance value P = 0.0001, which was <0.05. Hence, the results were found to be statistically significant.</p><p><strong>Conclusion: </strong>The maximum shear bond strength between PEEK and maxillofacial silicone was seen after primer application, followed by cathodic arc plasma surface treatment. Increasing the aging hours from 252 to 504 h, the shear bond strength was relatively reduced between PEEK and maxillofacial silicone.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"25 4","pages":"305-311"},"PeriodicalIF":1.0,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145329797","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}

{"title":"In vitro evaluation of the dispersion of nano-polylactic acid and nano-zinc oxide fillers in denture base resins using spectroscopic modalities.","authors":"Nikita Parasrampuria, N Gopi Chander, Jayanta Chattopadhyay","doi":"10.4103/jips.jips_142_25","DOIUrl":"https://doi.org/10.4103/jips.jips_142_25","url":null,"abstract":"<p><strong>Aim: </strong>Polymethyl methacrylate (PMMA) is a widely used denture base material, but its mechanical and antimicrobial properties require further improvement to the diverse clinical situations. Nanoparticles such as zinc oxide (ZnO) and polylactic acid (PLA) offer promising enhancements through improved structural and functional integration. The aim of the study was to assess the molecular characterization and structural integration of PMMA modified with nano-ZnO and nano-PLA.</p><p><strong>Settings and design: </strong>This was an in vitro material characterization study.</p><p><strong>Materials and methods: </strong>Forty samples were fabricated and divided into two groups: control (n = 20, unmodified PMMA) and test (n = 20, PMMA reinforced with 10% nano-PLA and 3% ZnO). A high-shear mixing technique was used. Molecular interactions were evaluated using Fourier-transform infrared spectroscopy (FTIR), and energy-dispersive X-ray spectroscopy (EDS) estimated the nanoparticle dispersion and elemental composition.</p><p><strong>Statistical analysis used: </strong>Qualitative analysis was used for statistical analysis.</p><p><strong>Results: </strong>FTIR confirmed the inclusion of nano-PLA and nano-ZnO, with a broad absorption peak at 3500 cm-1 indicating increased polarity and hydrogen bonding. EDS analysis verified the presence of carbon, oxygen, and zinc, with uniform nanoparticle dispersion. Nano-PLA addition reduced crystallinity and nano-ZnO promoted crystal formation, indicating their functions in structural modification.</p><p><strong>Conclusion: </strong>The study confirmed molecular interactions and uniform elemental dispersion, with indications of reduced crystallinity. These findings suggest potential for further investigations into the mechanical and antimicrobial properties of this modified resin for clinical applications.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"25 4","pages":"346-352"},"PeriodicalIF":1.0,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145329798","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}