The Journal of Indian Prosthodontic Society最新文献

{"title":"Ocular prosthesis motility and quality of life in subjects with custom ocular prostheses: A superimposed limbus test approach - A cross-sectional study.","authors":"Orbadewo Atma Saktinegara, Irfan Dammar, Muhammad Ikbal","doi":"10.4103/jips.jips_480_25","DOIUrl":"10.4103/jips.jips_480_25","url":null,"abstract":"<p><strong>Aim: </strong>The purpose of this study was to objectively evaluate ocular prosthesis motility and its correlation with quality of life (QoL) among subjects using custom ocular prostheses.</p><p><strong>Settings and design: </strong>Cross-sectional analytical observational study conducted at the Dental and Oral Hospital, Hasanuddin University.</p><p><strong>Materials and methods: </strong>Forty subjects with custom ocular prostheses were evaluated. Prosthesis motility was assessed using the limbus test scheme and digitally analyzed using a superimposed method in CorelDRAW. QoL was assessed using a validated questionnaire.</p><p><strong>Statistical analysis used: </strong>Mann-Whitney U, Kruskal-Wallis, Wilcoxon signed-rank, and Spearman correlation tests.</p><p><strong>Results: </strong>Compared with the contralateral normal eye, prosthetic motility showed a significant reduction, with an average loss ranging from 68% to 79%. Adduction movement was significantly associated with age (P = 0.016) and the duration of prosthesis use (P = 0.007). A significant positive correlation was found between prosthesis motility (objective measurement) and perceived QoL across several domains (ρ =0.471-0.577, P < 0.05).</p><p><strong>Conclusion: </strong>The average QoL of custom ocular prosthesis users was rated as good. Prosthesis motility was significantly associated with age and duration of use. Furthermore, motility has a notable impact on subject satisfaction and overall QoL.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"26 2","pages":"175-183"},"PeriodicalIF":1.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13118139/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147594882","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 oral mycobiota diversity among healthy removable acrylic denture wearers and nondenture wearers: An exploratory pilot study.","authors":"V Kalvikarasi, Shivasakthy Manivasakan, Dhamodharan Ramasamy, David Livingstone","doi":"10.4103/jips.jips_511_25","DOIUrl":"10.4103/jips.jips_511_25","url":null,"abstract":"<p><strong>Aim: </strong>The aim of this study was to compare the oral mycobiota diversity among healthy removable acrylic denture wearers and nondenture wearers by next-generation sequencing technique.</p><p><strong>Settings and design: </strong>This was an in vivo cross-sectional analytical pilot study.</p><p><strong>Materials and methods: </strong>A study with 12 participants aged 40-60 years analyzed DNA from saliva samples using ITS amplicon sequencing. Next-generation sequencing data compared mycobiota composition, alpha diversity, and beta diversity between denture wearers and nondenture wearers with statistical analyses.</p><p><strong>Statistical analysis used: </strong>Alpha diversity was assessed using Shannon, Simpson, and operational taxonomic unit counts, with analysis of variance tests for statistical significance. Beta diversity was evaluated using Bray-Curtis distances, principal component analysis, and PCoA for community visualization. Permutational multivariate analysis of variance (PERMANOVA) and analysis of similarity (ANOSIM) tested beta diversity differences using the vegan package in R.</p><p><strong>Results: </strong>The oral mycobiota showed greater richness and diversity in nondenture wearers than denture wearers, with distinct community composition. Alpha diversity was significantly higher in nondenture wearers (P = 0.043). Beta diversity revealed clear group clustering (PERMANOVA: F = 4.3394, P = 0.005), and ANOSIM confirmed significant compositional differences (R = 0.6587, P = 0.001). Permutational analysis of multivariate dispersions showed no significant difference in dispersion (F = 0.454, P = 0.489), indicating homogeneity between the groups.</p><p><strong>Conclusion: </strong>This study shows that dentures alter oral fungal composition, with differences in the Ascomycota-Basidiomycota ratio between wearers and nonwearers. Denture wearers showed higher Aspergillus, Alternaria, Candida, Clonostachys, and Malassezia, while nonwearers had greater overall diversity. These findings suggest potential fungal indicators of denture wearers, requiring further validation.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"26 2","pages":"200-207"},"PeriodicalIF":1.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13118146/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147594873","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":"Role of sodium hypochlorite and ethyl alcohol and mechanical cleaning aid in cleaning used healing abutments: A cross-sectional study.","authors":"Ambika Thakur, Mahendra Anant, Deepesh Kumar Gupta, Anumeha Jha, Shubham Sethi, Garima Patel","doi":"10.4103/jips.jips_429_25","DOIUrl":"10.4103/jips.jips_429_25","url":null,"abstract":"<p><strong>Aim: </strong>This study compared the effectiveness of two chemical disinfectants in combination with mechanical and ultrasonic cleaning followed by sterilization in rendering healing abutments (HAs) reusable.</p><p><strong>Settings and design: </strong>A cross-sectional study was conducted in the dental hospital.</p><p><strong>Materials and methods: </strong>Sixty-four used HAs were collected and randomly allocated into two groups. After macro-mechanical cleaning with a proxa brush, Group 1 was disinfected with 5% sodium hypochlorite and Group 2 with 72% ethyl alcohol for 10 min. All the samples were subjected to ultrasonic cleaning and long-cycle autoclaving. HAs were stained with Phloxine B and examined under magnification to evaluate residual contamination on occlusal, abutment driver hole (ADH), body (occlusal, middle, connector), connector (towards body [CB], middle [CM], screw [CS]), and screw thread regions.</p><p><strong>Statistical analysis: </strong>Data were analyzed using the Chi-square and Fisher's exact tests at a significance level of P < 0.05.</p><p><strong>Results: </strong>Both groups exhibited residual contamination. Significantly higher staining was observed in the ethyl alcohol group on occlusal and body regions (P < 0.05). Increased staining was also noted in ADH and connector regions, which was not statistically significant.</p><p><strong>Conclusion: </strong>Although sodium hypochlorite was found to be more effective than ethyl alcohol for HA decontamination, persistent bioburden, particularly in ADH, connector, and thread regions, emphasizes the need for a multi-step protocol including cleaning disinfection and sterilization of HAs for reuse.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"26 2","pages":"138-142"},"PeriodicalIF":1.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13118150/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147594856","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 venous blood, injectable platelet-rich fibrin, and synthetic graft on implant stability following indirect sinus augmentation.","authors":"Mallikarjuna Ragher, Sanath Kumar Shetty, Rajesh Shetty, Savitha Dandekeri, M Sunaina, Nafiya Abdul Aziz","doi":"10.4103/jips.jips_529_25","DOIUrl":"10.4103/jips.jips_529_25","url":null,"abstract":"<p><strong>Aim: </strong>This clinical study evaluated the effects of four different approaches without graft, venous blood, injectable platelet-rich fibrin (i-PRF), and a synthetic graft-on implant stability following indirect sinus augmentation using the Crestal Approach Sinus (CAS) Kit.</p><p><strong>Settings and design: </strong>This study was designed as a prospective, randomized, controlled, double-blinded clinical trial conducted among participants with missing maxillary posterior teeth.</p><p><strong>Materials and methods: </strong>Sixty-four participants with a residual bone height of 4-6 mm were randomly allocated into four groups using a computer-generated randomization sequence, with allocation concealment achieved by sequentially numbered, opaque, sealed envelopes. Sixty-four implants were placed using the CAS Kit through a crestal approach. Implant stability was evaluated at baseline and after 6-months using resonance frequency analysis (RFA). Both the outcome assessor and the statistician were blinded to the group assignments. The prospective registration of the trial was completed with the Clinical Trials Registry of India (CTRI/2025/03/081640). Sample de-identification was performed by an independent investigator, and no adverse events were reported. Statistical Analysis used: Statistical evaluation of the data was performed using one-way ANOVA, with Tukey's post hoc test applied for intergroup comparisons.</p><p><strong>Results: </strong>At baseline, all four groups demonstrated comparable ISQ values (P>0.05). At 6 months, Group 3 (i-PRF, ISQ: buccal 70.06 ± 6.31; mesial 74.75 ± 2.52) and Group 4 (synthetic graft, buccal 75.87 ± 2.87; mesial 76.37 ± 2.94) showed significantly greater stability compared to Group 1 (Without graft, buccal 54.81 ± 6.18; mesial 55.75 ± 8.09) and Group 2 (venous blood, buccal 56.75 ± 5.62; mesial 61.50 ± 9.29) (P<0.001). No significant differences were observed between i-PRF and synthetic graft groups (P>0.5).</p><p><strong>Conclusions: </strong>Indirect sinus augmentation using i-PRF or a synthetic graft significantly enhances implant stability compared to without graft and venous blood groups. i-PRF demonstrated outcomes comparable to the synthetic graft, highlighting its value as a cost-effective alternative in without graft sinus augmentation.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"26 2","pages":"168-174"},"PeriodicalIF":1.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13118155/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147594818","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 print orientation on the dimensional accuracy of three-dimensional-printed complete denture models: A comparative analysis of VAT photopolymerization and fused deposition modeling technologies.","authors":"Neeraj Kumar Chandraker, Gopi Naveen Chander, Rajendra Kumar Dubey","doi":"10.4103/jips.jips_334_25","DOIUrl":"10.4103/jips.jips_334_25","url":null,"abstract":"<p><strong>Aim: </strong>To evaluate the effect of print orientation (0°, 45°, and 90°) on the dimensional accuracy, precision, and production parameters of three-dimensional (3D) printed complete denture models fabricated using VAT photopolymerization and fused deposition modeling (FDM) technologies.</p><p><strong>Settings and design: </strong>An in-vitro experimental comparative study was conducted to analyze orientation-dependent variations in dimensional trueness and precision among denture models fabricated with two additive manufacturing systems.</p><p><strong>Materials and methods: </strong>A complete denture prosthesis STL file was fabricated in 60 samples using VAT photopolymerization and FDM technologies across three orientations (0°, 45°, and 90°). Printed models underwent postprocessing, followed by digital superimposition to evaluate trueness and precision.</p><p><strong>Statistical analysis used: </strong>Statistical analyses were performed using one-way ANOVA with post hoc Tukey's honestly significant difference tests and independent t-tests for intertechnology comparison.</p><p><strong>Results: </strong>VAT prints demonstrated higher average accuracy (mean deviation: 0.1106 mm) but greater variability (standard deviation [SD] =0.2448 mm) than FDM (mean deviation: 0.0316 mm, SD = 0.1558 mm). Across both technologies, the 0° orientation showed the least deviation (VAT: 0.1106 mm and FDM: 0.0316 mm). ANOVA indicated no significant differences among orientations (P = 0.109), whereas t-tests revealed substantial differences between technologies (t = 16.46, P < 0.00001). FDM at 90° exhibited the lowest variability (SD = 0.1163 mm), suggesting a trend toward improved consistency, though this did not reach statistical significance.</p><p><strong>Conclusion: </strong>Print orientation influenced dimensional accuracy trends, but only technology type showed statistically significant differences. VAT photopolymerization is suitable for high-precision applications.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"26 1","pages":"24-31"},"PeriodicalIF":1.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12912512/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145879167","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":"Adapting to digital change in Indian dental laboratories.","authors":"Manish Katyayan","doi":"10.4103/jips.jips_554_25","DOIUrl":"10.4103/jips.jips_554_25","url":null,"abstract":"","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"26 1","pages":"1-2"},"PeriodicalIF":1.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12912481/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145879140","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":"Does resin cement choice influence the fracture strength of bonded lithium disilicate veneers? An ex vivo study.","authors":"Prathibha Mariam Thomas, Poonam Bali, Nirmal Kurian, Angleena Y Daniel, Shivangi Vashishth, Mukul S Lal","doi":"10.4103/jips.jips_390_25","DOIUrl":"10.4103/jips.jips_390_25","url":null,"abstract":"<p><strong>Aim: </strong>The aim of this study was to evaluate and compare the fracture strength of ceramic veneers bonded to natural teeth using different light-cure resin cements.</p><p><strong>Settings and design: </strong>An ex vivo study.</p><p><strong>Materials and methods: </strong>Thirty extracted human maxillary anterior teeth were collected and prepared to receive lithium disilicate ceramic veneers, which were allocated into two groups based on the type of resin cement employed for bonding to natural teeth. The specimens were randomly divided into two groups. One group was bonded with Variolink NLC (Ivoclar), whereas the other was bonded with RelyX cement (3M ESPE). Fracture strength was evaluated using a universal testing machine (UTM), with the maximum load required to induce fracture recorded. The tests were conducted under a controlled crosshead speed of 1 mm/min using the UTM, and the maximum load required to cause fracture was recorded for each specimen.</p><p><strong>Statistical analysis used: </strong>The Shapiro-Wilk and Kolmogorov-Smirnov tests were employed to assess the data's normality. The variables between the groups were compared using the independent t-test. If P < 0.05, all results were deemed statistically significant.</p><p><strong>Results: </strong>The mean fracture strength of lithium disilicate veneers differed significantly between the two groups. The mean fracture resistance for RelyX was 0.237 ± 0.083 kN, whereas Variolink demonstrated a higher mean of 0.363 ± 0.109 kN.</p><p><strong>Conclusion: </strong>Within the limitation of the study, it was concluded that veneers bonded with Variolink NLC cement exhibited higher fracture strength compared to those bonded with RelyX veneer cement.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"26 1","pages":"43-48"},"PeriodicalIF":1.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12912493/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145879159","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 and physical properties of provisional crown and bridge materials fabricated using milling, three-dimensional printing and conventional methods: An in vitro study.","authors":"Sridevi Marothi, Satyanarayana Raju Mantena, Rama Krishna Alla, Narasimha Rao Guddala, Bheemalingeswara Rao Donimukkala, Vineeth Guduri","doi":"10.4103/jips.jips_314_25","DOIUrl":"10.4103/jips.jips_314_25","url":null,"abstract":"<p><strong>Aim: </strong>To evaluate and compare the mechanical and physical properties of provisional crown and bridge materials fabricated using milling, three-dimensional (3D) printing, and conventional methods.</p><p><strong>Settings and design: </strong>This was a comparative in vitro study.</p><p><strong>Materials and methods: </strong>Six different provisional resin materials, with two commercial brands representing each fabrication technique (milled resins including Sagemax and Ruthinium, 3D printed resins including Dionavi and Ackudent, and conventionally fabricated cold-cure resins including Dental Products of India (DPI) and Cool Temp) were tested. A total of 210 samples were prepared, 35 from each material, using their respective fabrication methods. Based on the properties to be evaluated, the 35 samples were further divided into 5 subgroups, each with 7 samples (n = 7). The cylindrical-shaped samples (4 mm × 6 mm) were subjected to tests for compressive strength (CS) and diametral tensile strength (DTS). Rectangular samples (25 mm × 2 mm × 2 mm) were used to assess the flexural strength (FS) and the microhardness (MH). Additionally, disc-shaped samples (10 mm × 2 mm) were examined for physical properties, surface roughness (SR).</p><p><strong>Statistical analysis used: </strong>One-way analysis of variance and post hoc Tukey's tests were used.</p><p><strong>Results: </strong>Both milled and 3D printed resin groups demonstrated significantly higher CS and FS (P = 0.001) except with 3D Ackudent. Significantly higher DTS and MH (P = 0.001) were found with both the milling and control groups compared to the 3D-printed resin groups. Control groups exhibited the highest SR (P = 0.022) compared to both milling and 3D printed groups.</p><p><strong>Conclusion: </strong>Milled provisional resins showed superior mechanical properties, with Sagemax showing the highest FS and MH, Ruthinium with the highest DTS. Both 3D printed resins exhibited the lowest DTS and MH, though 3D Dionavi showed higher CS compared to milled and conventional resins. The conventional resins showed lower FS than milled resins and 3D Dionavi but higher than 3D Ackudent. Both 3D printed and milled resins showed smoother surfaces than those of conventional provisional resins.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"26 1","pages":"77-86"},"PeriodicalIF":1.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12912495/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145879170","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":"Microthreaded versus smooth implant collars: A randomized trial on peri-implant inflammatory cytokines and crestal bone levels.","authors":"Paulina Mishra, Sapna Rani, Pankaj Dhawan, Anjana Goyal, Neha Jain","doi":"10.4103/jips.jips_453_25","DOIUrl":"10.4103/jips.jips_453_25","url":null,"abstract":"<p><strong>Aims: </strong>To evaluate the impact of implant collar design on peri implant inflammatory biomarkers and crestal bone levels over a 6-month period.</p><p><strong>Settings and design: </strong>This pragmatic, randomized, parallel-group clinical trial was conducted at the Department of Prosthodontics and Crown and Bridge, Manav Rachna Dental College, between May 2023 and May 2024.</p><p><strong>Materials and methods: </strong>The study included 30 systemically healthy patients aged 20-60 years with a single missing tooth in the mandibular molar region. Patients were randomly assigned to two groups based on the implant collar design - smooth or microthreaded. Implants were placed following a standardized two stage surgical protocol. Peri-implant crevicular fluid was collected at the time of implant placement, 3 months, and 6 months postplacement to assess inflammatory biomarkers (interleukin-1 [IL-1β] and tumor necrosis factor alpha [TNF-α]) using ELISA. Peri-implant crestal bone levels were measured radiographically at the same intervals.</p><p><strong>Statistical analysis used: </strong>Statistical analysis was performed using the SPSS (version 21.0). The data were analyzed using appropriate statistical tests. P < 0.05 was considered statistically significant.</p><p><strong>Results: </strong>IL-1β and TNF-α increased in both groups at the 3-month follow-up, reflecting a typical postsurgical inflammatory response and subsequently decreased at 6 months. The changes in cytokine levels were not significantly different (P > 0.05) between groups, suggesting a similar inflammatory response regardless of collar design. Crestal bone levels in implants with microthreaded collar design exhibited significantly lower loss (0.44 mm) compared to smooth collar implants (0.94 mm), with a statistically significant mean difference of 0.5 mm (P = 0.019). Correlation analysis revealed no statistically significant relationships between crestal bone levels and inflammatory markers at any time point.</p><p><strong>Conclusion: </strong>Although both collar designs had a limited influence on the early peri-implant inflammatory response, but microthreaded collars were more effective in preserving crestal bone.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"26 1","pages":"87-95"},"PeriodicalIF":1.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12912478/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145879207","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 abutment screw loosening with two different thread lockers under cyclic loading: An in vitro study.","authors":"Lizy Teena Arul, Vidyashree Nandini Venugopal, Russia Marimuthu, Sarthak Ray Arindham, Manjula Gunasekeran","doi":"10.4103/jips.jips_321_25","DOIUrl":"10.4103/jips.jips_321_25","url":null,"abstract":"<p><strong>Aim: </strong>To evaluate and compare the effects of different thread lockers on implant abutment screw loosening.</p><p><strong>Settings and design: </strong>An in-vitro study.</p><p><strong>Materials and methods: </strong>Thirty implant-abutment assemblies were divided into 3 groups: Control group (without threadlocker), dimethacrylate group, and methacrylate group. Each group was subdivided into static and dynamic groups. The specimens were torqued to 35 Ncm, and detorque values were measured after 1 month in static conditions and after cyclic loading. The cyclic loading protocol involved 240,000 cycles at a velocity of 16 mm/s over a 48-h period in a moist environment, simulating 1 year of clinical function.</p><p><strong>Statistical analysis used: </strong>Two-way ANOVA tests were applied to assess intergroup comparisons of detorque values (Ncm) under static and dynamic conditions.</p><p><strong>Results: </strong>Results were assessed using one-way, two-way ANOVA and multiple pairwise comparisons with a significance level of P ≤ 0.05. The methacrylate group demonstrated the highest detorque values (static: 36.46 ± 0.95 Ncm, dynamic: 33.22 ± 0.34 Ncm), followed by the dimethacrylate group (static: 32.84 ± 1.12 Ncm, dynamic: 29.98 ± 1.05 Ncm). The control group exhibited the lowest detorque values (static: 28.80 ± 0.96 Ncm, dynamic: 25.84 ± 0.63 Ncm). Detorque values were consistently higher in the static condition (32.40 ± 3.37 Ncm) compared to the dynamic condition across all groups (29.68 ± 3.20 Ncm), with statistically significant differences observed (P = 0.000).</p><p><strong>Conclusion: </strong>Within the limitations of the study, application of threadlockers significantly improved abutment screw retention, with methacrylate exhibiting superior performance over dimethacrylate. The reduction in detorque values under cyclic loading highlights the need for enhanced retention strategies in implant prosthetics. Incorporating methacrylate-based threadlockers in clinical practice may mitigate screw loosening and enhance the long-term success of implant-supported prostheses.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"26 1","pages":"49-55"},"PeriodicalIF":1.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12912506/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145879146","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}