Publications by authors named "Pronob Sanyal"

11 Publications

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Comparative evaluation of frictional resistance of extracoronal attachments of different designs and lengths in fixed partial denture: A finite element analysis.

J Indian Prosthodont Soc 2021 Jan-Mar;21(1):99-105

Department of Prosthodontics and Crown and Bridge, School of Dental Sciences, KIMS-DU, Karad, Maharashtra, India.

Aim: The purpose of the study was to evaluate the frictional resistance and the vertical force required to achieve the frictional resistance for different length and designs of extracoronal attachments used in fixed partial denture (FPD).

Setting And Design: Finite element analysis.

Materials And Methods: Four different designs and five different lengths (3 mm, 3.5 mm, 4 mm, 4.5 mm, and 5 mm) of extracoronal attachments for FPD were selected from different manufacturers. Three-dimensional models of all the samples were simulated using Catia V5 software. The properties were incorporated to the software to simulate the clinical conditions. The frictional resistance and the vertical force required to achieve frictional resistance were analyzed using ANSYS workbench 15.0 finite element software.

Statistical Analysis Used: ANOVA and Tukey's post hoc test.

Results: The mean microhardness of the Variolink N resin cements were significantly higher than Panavia SA ones (P < 0.001). Variolink N cements exhibited lower sorption/solubility than Panavia SA resin cements (P < 0.05). The ceramic shade had a significant influence on the microhardness of both cements (P < 0.001) but had no significant effect on the sorption/solubility of resin cements (P > 0.05).

Conclusion: Interposition of monolithic zirconia decreases the microhardness of resin cement especially Panavia SA. The microhardness decreased in Variolink N with the increase in the chroma saturation of ceramics. However, in Panavia SA, it was altered by the shades. For both cements, there were no statistical differences between the sorption/solubility. There was a reverse correlation between microhardness and water sorption/solubility of both cements.
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http://dx.doi.org/10.4103/jips.jips_463_19DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8061438PMC
July 2021

Evaluation of the effect of ultraviolet light polymerized clear adhesive on shear and tensile bond strength of heat cure denture base resin to the cobalt-chromium retentive minor connector: An study.

J Indian Prosthodont Soc 2020 Oct-Dec;20(4):394-401. Epub 2020 Oct 8.

Department of Prosthodontics and Crown and Bridge, School of Dental Sciences, KIMS-DU, Karad, Maharashtra, India.

Aim: The aim of this study is to evaluate the efficacy of new material ultraviolet (UV) light polymerized clear adhesive on shear and tensile bond strength of heat cure denture base resin (Polymethylmethacrylate (PMMA)) to cobalt-chromium (Co-Cr) retentive minor connector.

Setting And Design: Comparative evaluation- In-vitro study.

Materials And Methods: Sixty samples of Co-Cr plates mimicking minor connectors were fabricated. Thirty samples were coated with new material UV light polymerized clear adhesive and cured under UV light source for 10 min. In gun-metal flask, metal plates were placed in the lower compartment over it. Heat cure acrylic resin was packed in the dough stage with the help of clamps and processed according to the manufacturer's instructions. Samples were kept in artificial saliva for 90 days. Shear and tensile bond strengths were calculated of each sample with a Universal testing machine, and results were statistically analyzed. Type of bond failure was observed for each sample under stereomicroscope.

Statistical Analysis Used: Unpaired t test.

Results: Tensile bond strength, as well as shear bond strength, showed that 0.93 N and 1.64 N respectively for without application of new adhesive was more as compared to that of samples with the application of new adhesive which is 0.75 N and 1.54 N respectively. Bond failure was found to be an adhesive failure in resin-metal interface.

Conclusions: Excellent bonding seen between the new adhesive and acrylic interface but limited effect on the metal interface. To increase bond strength between metal and resin interface, some surface treatment with the metal surface is needed to increase the bonding of the new adhesive to the metal surface.
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http://dx.doi.org/10.4103/jips.jips_85_20DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7814690PMC
October 2020

Anchored guided rehabilitation.

J Indian Prosthodont Soc 2020 Jul-Sep;20(3):321-325. Epub 2020 Jul 17.

Department of Prosthodontics and Crown and Bridge, School of Dental Sciences, KIMS-DU, Karad, Maharashtra, India.

The loss of mandibular continuity leads to difficulty in swallowing, problems in mastication, altered mandibular movement, impaired speech articulation, and cosmetic disfigurement. Rehabilitation of such patients becomes more challenging in the case of complete edentulous maxillary and mandibular arches due to a lack of support and anchorage. This case report describes prosthetic rehabilitation of completely edentulous arches with segmental mandibulectomy. Hence, the anchorage was provided with the help of osseointegrated implants in both the maxillary and mandibular arches. Deviation of the mandible toward the unresected side during mastication and other functions was corrected using a palatal ramp. An attempt was made for prosthetic rehabilitation of mandibulectomy defect which required a multidisciplinary approach and which fulfilled the patient's requirement of mastication.
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http://dx.doi.org/10.4103/jips.jips_311_19DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7654201PMC
July 2020

A study to assess communication hindrances by the means of work authorization for fixed dental prosthesis: A survey.

J Indian Prosthodont Soc 2020 Apr-Jun;20(2):208-213. Epub 2020 Apr 7.

Department of Prosthodontics and Crown and Bridge, School of Dental Sciences, Krishna Institute of Medical Sciences Deemed to be University, Karad, Satara, Maharashtra, India.

Aim: The aim of the study was to assess the hindrances in communication between the prosthodontic office and the laboratory technicians through work authorization.

Setting And Design: A questionnaire-based survey was carried out to assess communication gap between dentist and lab technicians through work authorization for FDPs.

Materials And Methods: A total of 114 dental laboratory technicians were provided with a questionnaire regarding work authorization form via Google doc files. The survey focused questions pertaining to fulfilling the following areas of work authorization: patient's information, name of the prescribing dentist, material for the prosthesis, pontic design of the prosthesis, shade description, and date of completion of work.

Statistical Analysis Used: The number of responses received was statistically evaluated using Fisher's -test and nonparametric Spearman's correlation coefficient ( ≤ 0.05).

Results: Eighty-five (74.5%) out of 114 laboratory technicians surveyed responded to the questionnaire. The patient's general information was satisfactorily filled in 75%-100% of the forms. Information regarding the pontic design, staining diagram, and preferred margin were on the lower side of the scale ranging between 25% and 50%.

Conclusions: The survey concluded that areas of work authorization with respect to fixed dental prosthesis require attention and need to be adequately filled by the dentist. In addition, the study suggests that the foundation of communication skill training programs in work authorization should be laid from the undergraduate curriculum. The concerned authorized bodies/specialty organizations should formulate a standardized work authorization format which can bridge the wide gap between the crown and bridge office and laboratory.
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http://dx.doi.org/10.4103/jips.jips_475_19DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7335025PMC
April 2020

A clinical comparative study to assess the efficacy of a new centric registration technique with a conventional technique.

J Indian Prosthodont Soc 2019 Oct-Dec;19(4):290-295. Epub 2019 Oct 10.

Department of Prosthodontics, School of Dental Sciences, Krishna Institute of Medical Sciences and Deemed University, Karad, Maharashtra, India.

Aim: The aim and objectives of this study were to assess and compare the efficacy of a new copyrighted technique (wax ball technique, L-77997/2018) and design (denture base design for the wax ball technique, L-78006/2018) for recording centric relation (CR).

Settings And Designs: - comparative study.

Materials And Methods: This study was conducted on sixty consented edentulous patients. The study participants were divided into Group I and Group II. CR in Group I patients was recorded using Dawson's bimanual technique (technique 1). For participants in Group II, CR was recorded using the authors' copyrighted technique (technique 2). Time taken and accuracy of CR records by both the techniques were evaluated.

Statistical Analysis Used: Descriptive statistics such as frequency and percentage were calculated for categorical variables, mean and standard deviation were calculated for quantitative variables. Independent -test was used to compare the time taken to record the CR between the two groups. The accuracy of both the techniques was assessed by Mann-Whitney U-test.

Results: The mean time taken for technique 1 was 56.47 s, whereas for technique 2, it was 5.97 s, with an overall mean difference of 50.5 s between the two techniques. Both techniques were found to be accurate, as the CR recorded during jaw relation matched with CR during trial in all the cases in both the groups (frequency 30 (N) and cumulative percentage 100%).

Conclusion: From the study, it was found that, time taken for technique 2 was statistically less compared to that of technique 1, and both the techniques were found to be equally accurate.
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http://dx.doi.org/10.4103/jips.jips_126_19DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6803795PMC
October 2019

A split-mouth clinico-radiographic comparative study for evaluation of crestal bone and peri-implant soft tissues in immediately loaded implants with and without platelet-rich plasma bioactivation.

J Dent Res Dent Clin Dent Prospects 2019 14;13(2):117-122. Epub 2019 Aug 14.

Department of Prosthodontics and Crown & Bridge, School of Dental Sciences, KIMSDU, Karad, India.

This study evaluated the viability of platelet-rich plasma for enhancement of osseous and associated soft tissue healing around single-piece implants, subjected to immediate loading and to compare it with a control site not treated with PRP. Twenty completely edentulous patients were selected and 2 one-piece implants with O-ball head were placed for mandibular overdenture. The implant on the right side was treated with PRP whereas the left side implant served as a control. All the cases were immediately loaded and marginal bone loss, probing depth, percussion, implant mobility and peri-implantitis were assessed and compared at 3, 6, 9 and 12 months. Overall analysis of the results showed less marginal bone loss, probing depth, percussion, implant mobility and periimplantitis around implants treated with PRP; however, the results were insignificant statistically. PRP can be used as a viable treatment adjunct in immediately loaded one-piece implants.
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http://dx.doi.org/10.15171/joddd.2019.018DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6773920PMC
August 2019

A comparative study of the mechanical properties of clear and pink colored denture base acrylic resins.

Ann Afr Med 2018 Oct-Dec;17(4):178-182

Department of Prosthodontics, School of Dental Sciences, KIMSDU, Karad, Maharashtra, India.

Context: Pink colored acrylic does not always satisfactorily replicate the natural gingival color, especially in individuals with pigmented mucosa. In such situation clear acrylic denture base material can be used. Hence, there is a need of a comparative study of the mechanical properties of the clear and pink colored denture base resins.

Aims: The aim of this study is to compare the mechanical properties, i.e., tensile, flexural, compressive, and impact strength (IS) of clear and pink colored denture base resins.

Settings And Design: This was comparative in vitro study.

Materials And Methods: A total of 80 specimens were divided into two groups of 40 specimens each of clear and pink colored acrylic resin. Specimens for testing flexural, tensile, compressive, and ISs of acrylic resin (10 in each group) were divided. A universal testing machine was used for measuring flexural, tensile, and compressive strength (CS) while the Izod/Charpy impact tester was used for IS.

Results: The mean tensile strength for clear resin (n = 10) was 30.90 ± 1.663 MPa and that for pink resin (n = 10) was 31.30 ± 8.166 MPa. The mean residual flexural strength for clear resin (n = 10) was 75.60 ± 17.212 MPa, whereas for pink resin (n = 10) was 76.10 ± 14.130 MPa. The mean CS for clear resin (n = 10) was 84.60 ± 2.503 MPa and for pink resin (n = 10) was 85.40 ± 16.222 MPa. The mean IS for clear resin (n = 10) was 11.50 ± 5.104 MPa. While for pink resin (n = 10) was 11.90 ± 1.370 MPa.

Conclusions: The results show that clear acrylic resin denture base material has mechanical properties similar to that of pink acrylic resin denture base material.
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http://dx.doi.org/10.4103/aam.aam_65_17DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6330785PMC
August 2019

An In vitro Comparative Evaluation of Disinfectants on Standard and Clinical Microbial Strains on Heat Cure Resins.

J Clin Diagn Res 2017 May 1;11(5):ZC54-ZC58. Epub 2017 May 1.

Reader, Department of Oral and Maxillofacial Surgery, School of Dental Sciences, Krishna Institute of Medical Sciences Deemed University, Malkapur, Karad, Maharashtra, India.

Introduction: Oral cavity is colonised by numerous micro-organisms that form a biofilm on the acrylic resin. Hence, routine hygiene is essential to prevent oral mucosal inflammation and lesions. Knowledge of appropriate disinfecting agents for acrylic resins is crucial in this context.

Aim: To compare and evaluate the effectiveness of four commercially available disinfectants on heat cure acrylic resin specimens contaminated with standard and clinical strains of two micro-organisms commonly inhabiting the oral microflora.

Materials And Methods: Two hundred acrylic resin specimens (n=200), 10 in each group were contaminated in vitro with 1x10 cells/ml suspensions of standard and clinical strains of micro-organisms and were immersed in four disinfectants (1% sodium hypochlorite, 2% chlorhexidine digluconate, 2% glutaraldehyde and 3.8% sodium perborate) for 10 minutes. The control group was not subjected to any disinfection process. For collection of clinical strains, oral swab was passed over the buccal mucosa and grown on blood agar culture media. Organism confirmation was done by growing them on selective culture media. Final counts of micro-organisms per ml were performed by plating method for evaluation of microbial level reduction. Results obtained were subjected to ANOVA and Tukey's test.

Results: Standard strains of (C) and (S) subjected to various disinfectants showed varied mean Colony Forming Units per ml (CFU/ml) from <10,000 to 25,000 and <10000 to <50,000 respectively. Clinical strains and of (C) and (S) subjected to various disinfectants showed varied mean CFU/ml from <10,000 to 50,000 and from 10,000 to 50,000 respectively. Control groups showed maximum mean CFU/ml (>10). All intergroup comparisons were highly significant (p<0.001; HS) and intragroup comparisons were significant (p<0.05; S) except the comparison of clinical strains of subjected to 2% chlorhexidine digluconate and 2% glutaraldehyde which was found to be non significant (p>0.05; NS).

Conclusion: Almost 1% sodium hypochlorite was found to be the most effective disinfectant for both and . The least effective disinfectant being: 3.8% sodium perborate.
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http://dx.doi.org/10.7860/JCDR/2017/24759.9866DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5483810PMC
May 2017

"Nature cures:" An alternative herbal formulation as a denture cleanser.

Ann Afr Med 2017 Jan-Mar;16(1):6-12

Department of Pedodontics and Preventive Dentistry, School of Dental Sciences, Krishna Institute of Medical Sciences and Deemed University, Karad, Maharashtra, India.

Background: Candida albicans is one of the microorganisms which harbor the oral cavity, especially in elderly. However, the incidence of existence of this increases in patients using removable dental prosthesis. There is therefore a need to test the anticandidal efficacy of these cost-effective, easily available products to be used as routine denture cleansers.

Aim And Objectives: (1) To evaluate antifungal properties of triphala churna on the heat cure denture base material. (2) To evaluate the antifungal effect of chlorhexidine gluconate on the heat cure denture base material. (3) To compare the antifungal effect of triphala churna and chlorhexidine gluconate with a control. (4) To evaluate which among triphala churna and chlorhexidine gluconate has a better antifungal property on the heat cure denture base material.

Materials And Methods: Study population consisted of sixty dentures wearers from those attending the Outpatient Department of Prosthodontics of the School of Dentistry, Krishna Institute of Medical Sciences Deemed University, Karad. Swabs were collected from the dentures before and after the use of triphala and chlorhexidine. The swabs were cultured on Sabouraud dextrose agar and the total Candida counts were determined.

Conclusion: Triphala as an antifungal is shown to have more efficacy than the conventional chlorhexidine mouthwash. Résumé Arrière-plan: Candida albicans est l'un des micro-organismes qui abritent la cavité buccale surtout chez les personnes âgées. Cependant, l'incidence de l'existence de cette augmentation chez les patients utilisant des prothèses dentaires amovibles. Il est donc nécessaire de tester l'efficacité anticancédique de ces produits rentables et faciles à utiliser pour être utilisés comme nettoyants de routine pour prothèses dentaires. Buts et Objectifs: (1) Évaluer les propriétés antifongiques de Triphala churna sur le matériau de base de la prothèse thermo-durcissable. (2) Évaluer l'effet antifongique du gluconate de chlorhexidine sur le matériau de base de la prothèse thermo-durcissable. (3) Comparer l'effet antifongique de Triphala churna et du gluconate de chlorhexidine avec un témoin. (4) Évaluer lequel parmi Triphala churna et le gluconate de chlorhexidine a une meilleure propriété antifongique sur le matériel de base de la prothèse de durcissement à chaud. Matériaux et Méthode: La population de l'étude était constituée de soixante porteurs de prothèses dentaires de ceux qui fréquentaient le Département de Prosthodontie de l'École des Sciences Dentaires de l'Institut Krishna des Sciences Médicales de l'Université de Karad. Des prélèvements ont été effectués sur les prothèses avant et après l'utilisation de Triphala et de chlorhexidine. On a cultivé les écouvillons sur de l'agar Sabouraud dextrose et on a déterminé le nombre total de candida.

Conclusion: Triphala comme un anti fongique est démontré pour avoir plus d'efficacité que le lavage de la bouche classique chlorhexidine.
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http://dx.doi.org/10.4103/aam.aam_43_16DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5452698PMC
March 2017

An In-vitro Comparative Stereomicroscopic Analysis and Evaluation of Marginal Accuracy in Porcelain Fused to Metal Copings Fabricated in Two Different Finish Lines Using Variant Die Materials.

J Clin Diagn Res 2017 Jan 1;11(1):ZC01-ZC05. Epub 2017 Jan 1.

Senior Lecturer, Department of Prosthodontics and Crown and Bridge, School of Dental Sciences, Krishna Institute of Medical Sciences Deemed University , Satara, Maharashtra, India .

Introduction: Limited published information is available about the influence of preparatory designs and die materials on marginal accuracy of porcelain fused to metal copings using recently developed die materials.

Aim: To detect the influence of margin geometries and dimensional accuracy of contemporary die materials on vertical marginal gaps in Porcelain fused to metal coping using a Stereomicroscope (three dimensional analysis).

Materials And Method: Two chrome cobalt alloy models of mandibular first molars prepared to have shoulder and deep chamfer finish lines were CAD-CAM milled. Elastomeric impressions of these models were made in a custom tray, poured in Type IV Gypsum(n=10) and Resin modified Gypsum(n=10) and also packed with Epoxy resin (n=10) as a die material to form a total of 60 samples, 30 in each group (shoulder and deep chamfer). Wax patterns were fabricated, invested and castings in ceramic alloy were obtained in traditional manner. These copings were later analyzed on CAD/CAM models using stereomicroscope.

Results: Both the designs did not exhibit significant difference (p<0.05). Whereas, the three die materials exhibited significant difference (p<0.05) by Two way ANOVA test and Tukey's multiple Post Hoc test. Results from this study showed that vertical marginal gaps for copings fabricated on resin modified gypsum as a die material were within the clinically acceptable range.

Conclusion: Margin geometries both shoulder and deep chamfer have equal influence on vertical marginal gaps in metal ceramic restorations. Copings fabricated on Epoxy resin dies exhibited highest value of vertical marginal discrepancy, where as least value was determined for copings constructed on dies fabricated from resin modified gypsum.
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http://dx.doi.org/10.7860/JCDR/2017/21370.9131DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5324478PMC
January 2017

A survey of complete denture patients experiencing difficulties with their prostheses.

J Contemp Dent Pract 2013 May 1;14(3):524-7. Epub 2013 May 1.

Professor and Head, Department of Prosthodontics, College of Dental Sciences, Amargadh, Bhavnagar, Gujarat, India, e-mail:

Objective: The objective of this study was to investigate the problems faced by patients having complete dentures and the cleanliness of dentures by the patients.

Materials And Methods: This cross-sectional study is done with a sample of 178 patients having complete prosthesis since 1 year. A self-administered structured questionnaire pretested through a pilot survey was used in the study. The data were analyzed using the SPSS version 16.0. The Student's t-test, ANOVA and post hoc test were used as test of significance.

Results: Mastication discomfort and looseness of denture were the most common complaints followed by lack of retention (35.4%), bad breath (29.8%), tongue restriction (26.4%) and food accumulation (24.7%). There was a significant relationship of complaints with age groups (p=0.00).

Clinical Significance: This study concluded that most of the patients were present with complaints due to dentures. So, dental professionals should pay serious attention to their patients for subjective acceptable result of the dentures and also advice them to properly maintain hygiene of dentures.
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http://dx.doi.org/10.5005/jp-journals-10024-1355DOI Listing
May 2013
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