The Journal of Indian Prosthodontic Society最新文献

{"title":"Obturators: A proposed classification and its associated techniques.","authors":"Ranjoy Hazra, Ayush Srivastava, Dinesh Kumar","doi":"10.4103/jips.jips_313_22","DOIUrl":"10.4103/jips.jips_313_22","url":null,"abstract":"<p><strong>Statement of problem: </strong>Multiple classifications exist for maxillectomy defects. However, none of the existing classifications describes the defects as favorable or unfavorable from the prosthodontist's standpoint. The most common problem with prosthetic treatment in such patients is in getting adequate retention, stability, and support. The size and location of the defect usually influence the amount of impairment and difficulty in prosthetic rehabilitation.</p><p><strong>Proposed classification: </strong>A series of cases has been studied, and a newer type of maxillary defect is seen with a better presurgical involvement of the prosthodontist. This type of defects is not present in any of the existing classification; hence, a modification is proposed, and its requisite cast partial framework design is also given. Another treatment-based classification is also proposed for easy treatment planning in these cases. A case series of maxillectomy patients with varying types of defects rehabilitated with obturators with different designs, modes of retention, and fabrication procedure in accordance to the newer classification is described.</p><p><strong>Discussion: </strong>Surgical intervention creates communication among the oral cavity, nasal cavity, and maxillary sinus. The obturator prosthesis is commonly used as an effective means for rehabilitating such cases. There is a plethora of classifications available for maxillectomy defects though none of them takes existing dentition into consideration. While remaining dentition and various other favorable and unfavorable factors decide on the final prognosis of the prosthesis. Hence, a newer classification was planned with keeping in mind newer treatment modalities.</p><p><strong>Conclusions: </strong>Prosthodontic rehabilitation with obturator prosthesis design and manufactured by various principles and techniques restores the missing structures and acts as a barrier between the communication among the various cavities and definitely improving their quality of life. Considering the complexities of maxillary anatomy, the various permutations of the maxillectomy defect, the current trends in surgical management with presurgical prosthodontic planning, and various prosthodontic treatment options available, it is imperative that a more objective modification of the current classification described in this article is warranted for and could be more operator friendly in finalizing and communicating of the treatment plan.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"23 2","pages":"192-197"},"PeriodicalIF":1.2,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10262091/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9720503","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":"Significance of hypothesis and <i>P</i> value.","authors":"Anand Kumar Vaidyanathan","doi":"10.4103/jips.jips_131_23","DOIUrl":"10.4103/jips.jips_131_23","url":null,"abstract":"","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"23 2","pages":"103-104"},"PeriodicalIF":1.2,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10262099/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10022771","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":"<i>In vitro</i> comparison of the color degradation of two computer-aided design/computer-aided manufacturing provisional materials: A 12-month simulation.","authors":"Suzanna Maria Sayegh, Maha Daou, Georges Najjar, Elie Zebouni","doi":"10.4103/jips.jips_119_22","DOIUrl":"10.4103/jips.jips_119_22","url":null,"abstract":"<p><strong>Aim: </strong>This study evaluated the color aging of two computer aided design/computer aided manufacturing (CAD/CAM) provisional materials of different compositions (polymethyl methacrylate and composite resin) after exposure to thermal aging and immersion in coffee for 3, 6, and 12 intraoral months.</p><p><strong>Setting and design: </strong>The current in vitro study was conducted from September to December 2021 at the Craniofacial laboratory at the Saint Joseph University in Beirut, Lebanon.</p><p><strong>Materials and methods: </strong>The shades of 2.0 mm thick, 10.0 mm in diameter disk shaped specimens of VITA CAD Temp^® and Ceramill^® TEMP were measured using the VITA Linearguide 3D MASTER^® and a conversion table to extract the CIE LFNx01aFNx01bFNx01 values on a white background (n = 30).</p><p><strong>Statistical analysis used: </strong>The color differences ΔE at 3, 6, and 12 months were calculated and analyzed by repeated measures ANOVA followed by Bonferroni multiple comparisons, univariate analyses, and one sample t tests.</p><p><strong>Results: </strong>The mean ΔE_T1/T0, ΔE_T2/T0, and ΔE_T3/T0 values were significantly higher than the cutoff values for acceptability and perceptibility for the VITA CAD Temp^® and the Ceramill^® TEMP groups. In addition, the increase in ΔE overtime was significantly greater in the Ceramill^® TEMP group compared to the VITA CAD Temp^® group.</p><p><strong>Conclusions: </strong>The Ceramill^® TEMP changed color more and faster than the VITA CAD Temp^®. In addition, whether at 3, 6, or 12 months, the color variations of both materials are not only perceptible but also unacceptable compared to the initial shade.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"23 1","pages":"38-44"},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10088442/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9287657","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":"An <i>in vitro</i> study of a custom-made device for thermoregulation of the mixing slab on the setting properties of zinc oxide eugenol impression paste.","authors":"Divyansh Sinha, Laasya Shivanand Shettigar, Kishore Ginjupalli, Nagaraja P Upadhya, Abhishek Bhagat","doi":"10.4103/jips.jips_337_22","DOIUrl":"10.4103/jips.jips_337_22","url":null,"abstract":"<p><strong>Aim: </strong>The present study was aimed to investigate the functional relationship between the mixing temperature and properties of a commercially available zinc oxide eugenol impression paste (ZnOE paste).</p><p><strong>Settings and design: </strong>In-vitro study.</p><p><strong>Materials and methods: </strong>A custom-made simulated mixing device was indigenously designed to maintain different mixing temperatures, simulating cold, ambient, and hot weather. A commercially available ZnOE paste was mixed according to the manufacturer's instructions in the simulated mixing device at the temperatures ranging from 10°C to 50°C. Initial setting time and consistency were measured according to A. D. A. Specification No. 16 (n = 8). A stainless-steel die having 25, 50, and 75 μm lines was used for surface detail reproduction. Detail reproduction of the stone casts of the impressions was evaluated with a stereomicroscope at 30 magnification (n = 8). The shear bond strength of ZnOE paste to self-cure acrylic tray resin was measured by using the UTM at a crosshead speed of 0.5 mm/min (n = 8).</p><p><strong>Statistical analysis used: </strong>Data were analyzed by using one-way analysis of variance (ANOVA) and Tukey's post hoc tests at a confidence interval of 95% (alpha =0.05).</p><p><strong>Results: </strong>Initial setting time, consistency, and detail reproduction of the ZnOE paste were affected by the mixing temperature (P < 0.001). Mixing ZnOE paste at a lower temperature of 10°C and higher temperatures of 40°C and 50°C resulted in shorter initial setting time, thicker consistency, and poor detail reproduction. However, no significant difference was obtained in the shear bond strength among the different mixing temperatures evaluated (P > 0.05).</p><p><strong>Conclusion: </strong>Based on this in vitro study, it is advisable to perform the manipulation of ZnOE paste at a clinical/laboratory temperature of 30°C for optimum performance. The simulated mixing device used in this study can be an alternative for extreme climatic conditions.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"23 1","pages":"50-56"},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10088443/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9287660","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":"Using deep learning approaches for coloring silicone maxillofacial prostheses: A comparison of two approaches.","authors":"Meral Kurt, Zuhal Kurt, Şahin Işık","doi":"10.4103/jips.jips_149_22","DOIUrl":"10.4103/jips.jips_149_22","url":null,"abstract":"<p><strong>Aim: </strong>This study aimed to compare the performance of two deep learning algorithms, attention-based gated recurrent unit (GRU), and the artificial neural networks (ANNs) algorithm for coloring silicone maxillofacial prostheses.</p><p><strong>Settings and design: </strong>This was an in vitro study.</p><p><strong>Materials and methods: </strong>A total of 21 silicone samples in different colors were produced with four pigments (white, yellow, red, and blue). The color of the samples was measured with a spectrophotometer, then the LFNx01, aFNx01, and bFNx01 values were recorded. The relationship between the LFNx01, aFNx01, and bFNx01 values of each sample and the amount of each pigment in the compound of the same sample was used as the training dataset, entered into each algorithm, and the prediction models were obtained. While generating the prediction model for each sample, the data of the corresponding sample assigned as the target color were excluded. LFNx01, aFNx01, and bFNx01 values of each target sample were entered into the obtained models separately, and recipes indicating the ratios for mixing the four pigments were predicted. The mean absolute error (MAE) and root mean square error (RMSE) values between the original recipe used in the production of each silicone and the recipe created by both prediction models for the same silicone were calculated.</p><p><strong>Statistical analysis used: </strong>Data were analyzed with the Student t-test (α=0.05).</p><p><strong>Results: </strong>The mean RMSE values and MAE values for the ANN algorithm (0.029 ± 0.0152 and 0.045 ± 0.0235, respectively) were found significantly higher than the attention-based GRU model (0.001 ± 0.0005 and 0.002 ± 0.0008, respectively) (P < 0.001).</p><p><strong>Conclusions: </strong>Attention-based GRU model provided better performance than the ANN algorithm with respect to the MAE and RMSE values.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"23 1","pages":"84-89"},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10088445/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9292753","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 the antibacterial activity of red diode laser therapy and 0.2% chlorhexidine against <i>Aggregatibacter actinomycetemcomitans</i> on implant healing abutments: An <i>ex vivo</i> study.","authors":"Soumee Sengupta, S Ganesh, S Meenakshi, Avinash Singh Bettahalli, Raghavendra M Rao, K N Raghavendra Swamy","doi":"10.4103/jips.jips_158_22","DOIUrl":"10.4103/jips.jips_158_22","url":null,"abstract":"<p><strong>Aims: </strong>The intraoral microbiota has a high potential to undergo dysbiosis, causing inflammatory changes with respect to the tissues surrounding either a natural tooth or an implant. Thus, the longevity of implant prosthesis depends on a thorough implant decontamination protocol. Among all the techniques available for doing so, laser is garnering increasing popularity, owing to minimal bleeding, high efficiency, and faster healing. However, limited literature exists regarding the superiority of lasers over chlorhexidine (CHX), the indisputable gold standard antibacterial chemical agent. The aim of this study was to compare the percentage of bacterial reduction of Aggregatibacter actinomycetemcomitans from implant healing abutments post red diode laser therapy versus 0.2% CHX treatment.</p><p><strong>Settings and design: </strong>The current study had an ex vivo, observational, case-control design.</p><p><strong>Materials and methods: </strong>Patients reporting for the second stage of the implant surgery were taken as the source of data and the healing abutments, the clinical samples. Eleven patients were chosen with one intraoral implant serving as the test site for laser treatment and another, the control site for CHX treatment. Microbiological analysis was performed via quantitative real time polymerase chain reaction to compare the bacterial reduction percentage after each treatment.</p><p><strong>Statistical analysis used: </strong>Repeated measures ANOVA and independent sample t test were used.</p><p><strong>Results: </strong>The mean bacterial viability of the test group (laser) was 1.2%-1.6%, and 0.6%-1.4% for the control group (CHX). The former caused a mean bacterial reduction of 96.1% while the latter, 96.3%. Both the treatments caused a highly statistically significant reduction of viable bacterial counts (P = 0.001). However, when compared, there was no statistically significant difference in the bacterial reduction, when compared in between the two (P = 0.902).</p><p><strong>Conclusion: </strong>Laser treatment is at par with chemical implant surface decontamination. It can help bypass the complications of CHX and revolutionize the protocols for implant surface decontamination.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"23 1","pages":"12-20"},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10088439/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9287659","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":"Survey questionnaires in dental research.","authors":"Anand Kumar Vaidyanathan, Fathima R Banu","doi":"10.4103/jips.jips_519_22","DOIUrl":"10.4103/jips.jips_519_22","url":null,"abstract":"","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"23 1","pages":"1-3"},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10088438/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9287653","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":"Knowledge and awareness of polycaprolactone and its applications as provisional material in prosthodontic practice: A questionnaire-based survey.","authors":"Kavan A Patel, Jayanti R Patel, Vilas V Patel, Sareen Duseja, Harekrishna Jayendra Raval","doi":"10.4103/jips.jips_224_22","DOIUrl":"10.4103/jips.jips_224_22","url":null,"abstract":"<p><strong>Aim: </strong>The present study was done to evaluate the knowledge and awareness of different provisional materials, especially polycaprolactone (PCL) and their application in prosthodontic practice.</p><p><strong>Setting and design: </strong>A questionnaire based survey was carried out to assess the knowledge and awareness of PCL and its applications as provisional material in prosthodontic practice.</p><p><strong>Materials and method: </strong>A questionnaire-based descriptive study consisting of 10 questions related to different provisional materials and their applications in prosthodontic practice was formulated on Google Forms. The link was created and circulated among the prosthodontist faculty members of various dental institutes and private practitioners of India with the use of digital platforms such as E-mail and social media. The data were collected and examined using Microsoft Excel software for statistical evaluation.</p><p><strong>Statistical analysis used: </strong>For this descriptive type of study, knowledge and awareness among prosthodontists across India was evaluated using Microsoft Excel software.</p><p><strong>Results: </strong>The use of PCL was known only to 20.75% of prosthodontists. Moreover, its application and indications are known to only <1% of the study participants. Autopolymerizing resin was most commonly used for the custom tray and temporary base fabrication as well as temporization in crown and bridge prosthesis, while muscle deprogrammer and surgical template were commonly fabricated in heat-cure and clear acrylic resin, respectively. Pattern resin was found to be commonly used in splinting implant impression copings.</p><p><strong>Conclusion: </strong>The use of PCL as a temporary denture base, custom tray, muscle deprogrammer, implant impression splinting, and provisional for crown and bridge and templates should be encouraged and incorporated to get benefits of its characteristic properties. Considering the overall performance of PCL, its use should be incorporated into prosthodontic research and practice.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"23 1","pages":"78-83"},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10088449/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9292756","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":"Chemical characterization of silanized silver nanoparticles impregnated in poly (methyl methacrylate) resin: An <i>in vitro</i> study.","authors":"V Thillai Nayaki, Suma Karthigeyan, Seyed Asharaf Ali, G Kalarani, Krishnaraj Ranganathan, Ajay Ranganathan","doi":"10.4103/jips.jips_203_22","DOIUrl":"10.4103/jips.jips_203_22","url":null,"abstract":"<p><strong>Aim: </strong>The intention was to determine the chemical interaction of silanized AgNPs with PMMA by Fourier transform infrared (FTIR) spectroscopy.</p><p><strong>Settings and design: </strong>In-vitro comparative study.</p><p><strong>Materials and methods: </strong>This study is composed of four groups - 0.75% AgNP, 1.0% AgNP, 1.5% AgNP impregnated with PMMA, and nonimpregnated PMMA as control. The chemical nature of silanized AgNPs was studied using FTIR study.</p><p><strong>Results: </strong>The results showed the appearance of new peak between 1727/cm and 1436/cm, i.e., 1636.476/ cm, 1645.886/cm, and 1646.885/cm, representing the C = C stretch in the experimental groups, i.e., 2, 3, and 4, respectively. This peak confirms that coupling agent has chemically interacted with PMMA.</p><p><strong>Conclusion: </strong>It can be concluded that the AgNPs coated with the silane coupling agent TMSPM has chemically reacted with PMMA.</p>","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"23 1","pages":"45-49"},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10088452/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9292287","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 accuracy of hexed and nonhexed pickup impression copings in a multiple variable impression setup for recording multiple straight and angulated implant positions: An <i>in vitro</i> study.","authors":"Tavleen Kaur, Shefali Singla, Lalit Kumar","doi":"10.4103/jips.jips_218_22","DOIUrl":"10.4103/jips.jips_218_22","url":null,"abstract":"&lt;p&gt;&lt;strong&gt;Aim: &lt;/strong&gt;The aim of this study was to evaluate and compare the accuracy of hexed and nonhexed pickup impression copings with and without splinting using polyether (PE) and polyvinyl siloxane (PVS) impression materials in open-tray technique in recording multiple straight and angulated implant positions.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Settings and design: &lt;/strong&gt;An accurate impression results in an accurate definitive cast, thus minimizing the incidence of prosthesis misfit. The critical aspect is to record the three-dimensional location of the implant in bone rather than reproducing fine surface details. Precise fit of a fixed implant-supported prosthesis depends on the accuracy of the implant analog location within the definitive cast. Factors which affect impression accuracy include implant angulation, impression material, impression copings, technique, and splinting.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Materials and methods: &lt;/strong&gt;A sample size of 80 study models fabricated from the impression of different groups was included. A reference master model based on All-on-4 implant concept with two parallel (implants 1 and 2) and two angulated (implant 3 at 17° and implant 4 at 30°) was fabricated using implant angulation guide. All impressions were recorded using open-tray impression technique. The groups were divided into two main groups of 40 samples each. Group A used hexed open-tray impression copings and Group B used nonhexed open-tray impression copings. Both the groups involved impression recording using splinted (Subgroup I) and nonsplinted impression copings (Subgroup II). Further, impressions in each subgroup were made using PE (Subsubgroups a) and PVS (Subsubgroup b). A total of eight subsubgroups with ten samples each were included. Impressions were recorded for each group and poured into Type IV die stone for fabrication of study models. After 24 h, the study models and reference master model were fitted with implant abutments for measurement with coordinate measuring machine.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Statistical analysis used: &lt;/strong&gt;The mean differences of the interimplant distance R1 (1-2), R2 (1-3), R3 (2-4), and R4 (3-4) between the reference model and sample models in different subsubgroups were calculated and three-way analysis of variance test was applied with Tukey's post hoc tests.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Results: &lt;/strong&gt;No significant difference was found in mean coronal deviations for distance R1, R2, and R3 (P &gt; 0.05) between different study groups. P = 0.02 for R4 (distance between 17° and 30° implants) between impression materials subsubgroups suggested that significantly less distortion was created in location of highly angulated implants (&gt;30°) using PVS impression material. Splinting and type of coping did not have a significant influence on impression accuracy. Increasing angulation decreased the accuracy.&lt;/p&gt;&lt;p&gt;&lt;strong&gt;Conclusion: &lt;/strong&gt;PVS was found equivalent in accuracy to rigid PE for recording parallel or angulated implants. Impressions of i","PeriodicalId":22669,"journal":{"name":"The Journal of Indian Prosthodontic Society","volume":"23 1","pages":"21-29"},"PeriodicalIF":1.2,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10088440/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9287654","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}