Browsing by Author "Atul Bhatnagar"

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A comparative evaluation of neurophysiological activity, active tactile sensibility and stereognostic ability of complete denture prosthesis, and implant-supported prosthesis wearer—A pilot study
(John Wiley and Sons Inc, 2022) Bappaditya Bhattacharjee; Ritu Saneja; Atul Bhatnagar; Ashish Verma; Romesh Soni; Ankita Singh; Pavan Dubey
Aim: The study aimed to evaluate the effect of implant-supported prosthesis in completely edentulous participants in terms of osseoperception ability, neural activity, and stereognostic ability in comparison to removable prosthetic options. Materials and Methods: A total sample of 18 patients, irrespective of gender and age were allocated into three groups according to the three-treatment protocol (upper and lower complete denture, upper complete denture opposing lower implant-retained overdenture, implant-supported fixed prosthesis in both arches). Four weeks after completion of the treatment procedure active tactile sensibility (ATS) was checked by using varying thicknesses (12, 40, 80, 100, 200 μ) of articulating foils and papers. Functional magnetic resonance imaging (fMRI) was performed to record neurophysiological activity in cerebral cortex in all the participants. Various forms of test pieces (heat cure acrylic resin) were used to evaluate stereognostic ability. Data regarding the neurophysiological activity were analyzed by using Krushkal–Wallis test and p ≤ 0.05 was considered to be statistically significant. Data from stereognostic ability test procedure and ATS were compared by using chi-squared test and p ≤ 0.05 was considered to be statistically significant. Results: Statistically significant difference was found in between the articulating foils in terms of true negative responses as the foil thickness increased in participants wearing complete denture in both the arches (p = 0.004) and implant-supported fixed prosthesis in both the arches (p = 0.010). Participants in implant-supported fixed prosthesis group showed significantly more activation in primary motor cortex (right side), somatosensory cortex (left side), angular gyrus (both sides), temporal lobe (left) compared to other groups. No significant difference found in thalamus and premotor cortex region in between the participants of different groups. No statistically significant difference found in between the groups in terms of true responses identifying correct shapes. Mean number of correct responses in stereognostic ability test were 4.16 (83.33%), 3.5 (70%), 3.83 (76.66%) for participants of complete denture group, upper complete denture opposing lower implant retained overdenture group, and implant-supported fixed prosthesis group, respectively. Conclusion: Primary motor cortex, somatosensory cortex, and other regions of brain were diffusely activated in participants wearing implant-supported fixed prosthesis in both the arches. Less number of false responses were recorded in participants of implant-supported fixed prosthesis group and upper complete denture opposing lower implant-retained overdenture group in ATS test compared to participants wearing complete denture in both the arches. © 2022 Wiley Periodicals LLC.
Comparative evaluation of biting force and chewing efficiency of all-on-four treatment concept with other treatment modalities in completely edentulous individuals
(Wolters Kluwer Medknow Publications, 2020) Romesh Soni; Himanshi Yadav; Abhishek Pathak; Atul Bhatnagar; Vikram Kumar
Aim: To compare and evaluate biting force and chewing efficiency of all-on-four treatment concept, implant-supported overdenture, and conventional complete denture. Settings and Design: Invivo - comparative study. Materials and Methods: A total of 12 edentulous patients were included in the study and conventional complete dentures were fabricated. Patients were divided into two groups. In Group 1, complete dentures were replaced with implant-supported overdenture, and in Group 2, complete dentures were replaced with hybrid denture supported by all-on-four treatment concept. The biting force was assessed using a bite force sensor and electromyographic recordings were made by electromyogram for masticatory muscles when chewing three different consistencies of foods. Statistical Analysis Used: The data was statistically analyzed using software SPSS version 22.0. Paired t-test was used for intra-group comparison and unpaired t-test was used for intergroup comparison. Results: The difference in biting force and chewing efficiency for all-on-four treatment concept was statistically significant for overdenture and complete denture. The highest biting force and chewing efficiency were observed for all-on-four treatment concept, followed by implant-supported overdenture and complete denture. Conclusion: The study concluded that the completely edentulous individuals with atrophic posterior alveolar ridges can be rehabilitated successfully with improved biting force and chewing efficiency by All-on-four treatment concept. © 2020 Wolters Kluwer Medknow Publications. All rights reserved.
Comparative Evaluation of Implant Stability in Single Tooth Implant with Either Immediate or Delayed Functional Loading Protocol: A Prospective Clinical Study
(Jaypee Brothers Medical Publishers (P) Ltd, 2025) Kumari Deepika; Atul Bhatnagar; Harshika Gautam; Pg G.Naveen Kumar
Purpose: The present study was done to evaluate and compare implant stability for a single tooth implant with either an immediate or delayed functional loading protocol. Materials and methods: Twenty participants were assigned to each group: DL (delayed loaded) and IL (immediate loaded). Implant stability quotient (ISQ) was measured using resonance frequency analysis (RFA) at baseline and at scheduled follow-ups (DL: 3, 6, and 9 months; IL: 6 weeks, 3, and 6 months). Intergroup comparisons were performed using unpaired t-tests, intragroup changes with repeated measures ANOVA, and the correlation between ISQ and insertion torque (IT) was analyzed using Pearson’s coefficient. Results: All implants demonstrated adequate primary stability (ISQ ≥ 75) with high IT, and healing was uneventful. ISQ values were comparable between groups at baseline and 3 months (p?> 0.05), with a significant difference at 6 months (p < 0.05). Within-group ISQ changes over time were not significant; with DL showing a slight increase and IL a minor early dip followed by recovery. Both loading protocols maintained sufficient stability up to 6 months. A positive correlation between IT and ISQ at placement (DL: r = 0.211; IL: r = 0.321; p < 0.05) indicated that higher torque was associated with higher initial stability. Conclusion: Though the delayed loading (DL) protocol may still remain the treatment of choice, based on present findings, it may be concluded that an immediate functional loading protocol can be performed in implants with sufficient primary stability. © The Author(s).
Comparison of Psychophysical and Neurophysiological Activities in Complete Denture Wearers and Implant Retained Overdenture Wearers: An In Vivo Study
(Begell House Inc., 2025) Ritu Saneja; Bappaditya Bhattacharjee; Ashish Verma; Romesh Soni; Ankita Anand Singh; Pavan Kumar Dubey; Atul Bhatnagar
The present study aimed to evaluate degree of functional and physiological integration of dental implant used for implant retained overdenture and comparing these adaptive change with conventional complete denture in edentulous participants. The psychophysical method evaluated active tactile sensibility (ATS) threshold of sensory receptors of oral cavity and neurophysiological method assessed neurological changes with help of functional magnetic resonance imaging (fMRI) during mastication in participants of both the groups. Mann-Whitney U test was done to compare ATS threshold and activity of sensory cortex in fMRI before and after implant installation in completely edentulous participants. Statistical result showed significant increase (P < 0.001) in activation of sensory cortex, motor cortex, prefrontal cortex, temporal lobe in participants after wearing implant retained overdenture compared with complete denture. For 200, 100, and 80 μm articulating papers non-significant change found between two test groups. The 40 and 12 μm articulating papers showed statistically significant change in ATS threshold (P < 0.05) between two test groups in 12–14 weeks. ATS threshold decreased more in participants with Implant retained overdenture prosthesis as compared with conventional complete denture prosthesis. Most of the activation was seen in prefrontal cortex and bilateral somato-sensory cortex with implant retained prosthesis compared with conventional complete denture prosthesis. © 2025 by Begell House, Inc.
Effect of complete dentures on oral stereognostic ability in edentulous patients: A systematic review
(Wolters Kluwer Medknow Publications, 2021) Bappaditya Bhattacharjee; Ritu Saneja; Atul Bhatnagar
Aim: Oral stereognosis is an important sensation for a human being to percept any type of materials that are introduced in the oral cavity. It is defined as the ability of an individual to recognize objects using only tactile sensation without using vision, audition, balance, somatic function, taste, or smell. The primary purpose of this review was to evaluate the effect of complete dentures on oral stereognostic ability in edentulous subjects. Settings and Design: Systematic review based on PRISMA guidelines. Materials and Methods: A systematic search of the electronic databases like PubMed and Web of Science was done using keywords-'stereognosis,' 'oral stereognosis,' 'complete denture,' and 'complete edentulism.' In addition to this, a manual search of references mentioned in the articles and gray literature was done. Data extraction and assessment were done by two independent reviewers. Statistical Analysis Used: Qualitative analysis. Results: The literature search yielded a total of 61 articles. Thirteen duplicate articles were removed and 36 articles were rejected after initial screening of titles and abstracts. A total of 12 articles were selected for full text reading and 5 of them were included for qualitative analysis. Conclusion: All the included studies showed complete denture treatment therapy improved stereognostic ability in terms of correct identification of test pieces and time taken to identify the objects. There is also a direct relationship between the adaptability of dentures and stereognostic ability. © 2021 EDP Sciences. All rights reserved.
Effect of dopaminergic agonist group of drugs in treatment of sleep bruxism: A systematic review
(Elsevier Inc., 2022) Bappaditya Bhattacharjee; Ritu Saneja; Atul Bhatnagar; Pinki Gupta
Statement of problem: Various factors are responsible for sleep bruxism; however, whether the dopaminergic agonist group of drugs is effective in the treatment of sleep bruxism is unclear. Purpose: The purpose of this systematic review was to evaluate the effect of the dopaminergic agonist group of drugs in controlling sleep bruxism in comparison with no treatment or placebo-controlled treatment. Material and methods: Two electronic databases, PubMed and Cochrane Central, were searched by using the keywords bruxism, sleep bruxism, dopamine, and dopamine agonist. After screening titles and abstracts, only those articles which met predefined inclusion criteria were selected for full-text assessment. Clinical trials using the dopaminergic agonist group of drugs as a treatment approach to sleep bruxism were included. Results: The literature search yielded a total of 64 articles from the 2 electronic databases (PubMed, 53; Cochrane Central, 11). After removal of the duplicates (n=8), the initial screening of titles and abstracts was performed by 2 independent reviewers, removing 46 articles. A total of 10 articles were selected for full-text reading, and 4 studies were included for qualitative analysis. Conclusions: Levodopa (L-DOPA) and Bromocriptine showed decrease in root mean square value in electromyography per bruxism burst (P<.001) and 20% to 30% reduction of bruxism episodes during sleep in 2 different studies. However, treatment with bromocriptine led to conflicting result in another study in terms of frequency of bruxism episodes and amplitude of muscle contractions in electromyography (EMG). Bruxism bursts and episodes were also not significantly improved with another dopaminergic agonist group of drugs, Pramipexole (P>.001). Based on the limited evidence and conflicting results, significant conclusions cannot be generated, and further studies are required. © 2020 Editorial Council for the Journal of Prosthetic Dentistry
Effect of Selective Serotonin Reuptake Inhibitors on Dental Implant Survival Rate in Patients with Neurological Disorders: A Systematic Review and Meta-analysis
(Jaypee Brothers Medical Publishers (P) Ltd, 2020) Bappaditya Bhattacharjee; Rathindra Nath Bera; Atul Bhatnagar; Nachammai Nagarajan
Aim and objective: The aim and objective of the review was to evaluate how implant survival rate changes with the intake of selective serotonin reuptake inhibitors (SSRIs) in patients with neurological disorders. Materials and methods: A systematic literature search was done in an electronic database (PubMed). In addition to this manual search of the references and gray literature was also done. Case reports, animal studies, literature reviews, and articles in non-English languages were not included. The Newcastle–Ottawa Scale was followed to assess the quality of the included studies. The meta-analysis was performed using statistical software Review Manager 5.03 and the outcome mean was measured by bivariate differential mean statistic with an intergroup estimate with a 95% confidence interval. Results: A total of 344 articles were found in the PubMed database (n = 344) during the literature search. Five studies were included in the qualitative and quantitative analysis after removing duplicates and screening of titles and abstracts. Two studies were excluded by using eligibility criteria for the review. A total of 988 implants survived in the test group and 4,585 implants survived in the control group among all the studies (odds ratio: 0.41, 95% CI: 0.30–0.55). p < 0.00001 value from the analysis indicated a significant implant success rate in patients who were not taking any SSRI group of medications. Conclusion: After evaluating the data from included studies, it can be concluded that patients taking the SSRI group of drugs for any neurological disorders had a higher chance of implant failures compared to the control group of patients. © Jaypee Brothers Medical Publishers. 2020.
Effect of Two Different Impression Techniques on Masticatory Performance of Complete Denture Wearers: A Systematic Review
(Jaypee Brothers Medical Publishers (P) Ltd, 2021) Nachammai Nagarajan; Bappaditya Bhattacharjee; Ankita Singh; Atul Bhatnagar
Aim and objective: The aim of this review was to evaluate the efficacy of the masticatory performance of the complete dentures. The objective of this review was to evaluate scientific evidence of the impact of simplified impression technique versus conventional impression technique on masticatory performance of complete denture wearers. Materials and methods: Three electronic databases (PubMed, Web of Science, and Cochrane library) were searched until 30th October 2020, without any publication year limit. Manual search of the references cited in the included studies and gray literature were also included. Randomized clinical trials that assessed objectively the masticatory performance between complete dentures fabricated from two different impression techniques were included. Results: A total of 398 studies were obtained through search in 3 electronic databases (PubMed- 229, Web of Science- 155, and Cochrane library- 14). Qualities of randomized controlled clinical trials were assessed by Cochrane's tool for Systematic Reviews of Interventions. Heterogeneity of data and measurement methods between the studies limited the scope of their meta-analysis. Nine studies remained after the removal of duplicates and screening of titles and abstracts. Applying eligibility criteria remainder three randomized controlled clinical trials were included after removing six studies. Conclusion: No significant difference was found objectively in masticatory performance of individuals wearing complete dentures fabricated either by simplified impression technique or conventional impression technique. © 2021 International Journal of Prosthodontics and Restorative Dentistry. All rights reserved.
Effect of ultraviolet irradiation on the osseointegration of a titanium alloy with bone
(Medknow Publications, 2017) Ashish Yadav; Ranjana Yadav; Aratee Gupta; Akash Baranwal; Atul Bhatnagar; Vakil Singh
Introduction: Attempt has been made to analyze the potential of titanium (Ti) alloy for osteointegration by the effect of surface photo functionalization in different aspects as follows: in Ringer's solution, in vitro cell growth, and in vivo study on rabbit. The present study was aimed to investigate the influence of ultraviolet (UV) light on surface topography, corrosion behavior, and bioactivity of indigenously manufactured samples of Ti alloy mini-implant. Materials and Methods: The study includes surface modification of Ti samples by UV treatment, corrosion testing of the specimens using Potentiostat (GAMRY System), qualitative examination of modified surface topography using scanning electron microscope, and cellular viability test on Ti alloy surface (3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide ASSAY). To find the effect of UV light on implant bone integration, biochemical test was performed on the femur of rabbits. Results and Discussion: Corrosion resistance of untreated Ti alloy in Ringer's solution was found to be less, whereas corrosion rate was more. Corrosion resistance of UV-Treated samples was found to increase significantly, thereby lowering the corrosion rate. Cell growth in UV-Treated specimen was observed to be higher than that in untreated samples. It is important to mention that cell growth was significantly enhanced on samples which were UV treated for longer duration of time. Conclusions: There was a marked improvement in cell growth on UV-Treated Ti alloy samples. Hence, it is expected that it would enhance the process of osseointegration of Ti with bone. Another important finding obtained was that the removal torque values of UV-Treated implants were higher than that of untreated implants. The overall result reveals that UV treatment of implants does help us in speeding up the osseointegration process. © 2017 Medknow Publications. All rights reserved.
Efficacy of Arthrocentesis and Stabilization Splints in Treatment of Temporomandibular Joint Disc Displacement Disorder Without Reduction: A Systematic Review and Meta-analysis
(Springer, 2023) Bappaditya Bhattacharjee; Rathindra Nath Bera; Arju Verma; Romesh Soni; Atul Bhatnagar
Background: Temporomandibular joint disc displacement disorders are a group of temporomandibular disorders beside from other inflammatory disorders and growth related disorders of joint. The purpose of this analysis was to evaluate the efficacy of arthrocentesis procedure in comparison with stabilization splints used for disc displacement disorders without reduction. Materials and Methods: A systematic search was done in electronic databases (PubMed, Cochrane Central, Web of Science). In addition to this hand search of references and grey literatures was done. Qualities of randomized controlled clinical trials were assessed by Cochrane’s tool for Systematic Reviews of Interventions and the Newcastle–Ottawa Scale was followed to assess the prospective and retrospective studies. Outcome variables pain (VAS) and maximum mouth opening were assessed by the software review manager 5.03. Results: A total of five studies were included in the review. Three studies showed greater improvement of symptoms in patients of arthrocentesis group in terms of maximum mouth opening, pain (VAS) value. Two other studies found no significant advantage of arthrocentesis over the other treatment protocol. The meta-analysis resulted in statistically significant difference between outcome variables favouring arthrocentesis group (VAS 1–10) (Mean Difference: 3.10; 95% CI 1.74, 4.45; P ≤ .00001, Mean difference: 2.00; 95% CI 0.29, 3.71; P = 0.02). Conclusion: Arthrocentesis showed effective result in terms of increase in mouth opening and reduction of pain level compared to stabilization splint and other non-invasive approaches in patients with disc displacement disorders without reduction. Overall, results supported the rationale of using arthrocentesis in patients with disc displacement disorders without reduction. © 2021, The Association of Oral and Maxillofacial Surgeons of India.
Efficacy of different lasers of various wavelengths in treatment of peri-implantitis and peri-implant mucositis: A systematic review and meta-analysis
(Wolters Kluwer Medknow Publications, 2020) Ritu Saneja; Bappaditya Bhattacharjee; Atul Bhatnagar; P.G. Naveen Kumar; Arju Verma
Aim: Peri implant diseases lead to pathological changes in the peri implant tissues and loss of osseointegration. The purpose of this analysis is to evaluate the effect of various lasers and photodynamic therapy (PDT) on peri implant diseases compared to conventional procedures. Setting and Design: This meta analysis was conducted as per the Preferred Reporting Items for Systematic Reviews and Meta Analyses guidelines. Materials and Methods: A systematic search of the electronic databases such as PubMed, ICTRP, CT.gov, Embase, and Cochrane Library was done additional to manual search of peer review article on peri-implant diseases. Eleven randomized control clinical trials were included in which laser therapy and PDT were used as an interventional procedure. Results and Statistical Analysis Used: Review Manager 5.03 (RevMan, Nordic Cochrane Center, Copenhagen, Denmark), and random effects model were used to assess mean difference (MD). Bivariate differential mean statistic was used in intergroup estimate with 95% confidence interval (CI). I2 test statistics was applied for heterogenity and P < 0.05 was considered significant statistically. The literature search yielded a total of 113 articles among which 11 articles were included for quantitative analysis. The selected outcome PD reported MD −0.01 with 95% CI (−0.13, 0.16), P = 0.84, and CAL reported MD −0.09 with 95% CI (−0.32, 0.14), P = 0.45, respectively. Conclusion: Laser treatment as an adjunctive therapy or monotherapy in peri implantitis does not show any superior effects than conventional measures as per evidence. However, cases with peri implant mucositis have shown far more promising results with laser therapy compared to peri implantitis. © 2020 The Journal of Indian Prosthodontic Society.
Enhancement of Sensorimotor Cortical Adaptation after Dental Implantation in Comparison to the Conventional Denture-Demonstration by Functional MRI at 1-5T
(Wolters Kluwer Medknow Publications, 2021) Aprajita Verma; Atul Bhatnagar; Ishan Kumar; Ashish Verma
Background and Purpose: Dental implantation is thought to be associated with enhancement of neuro-cortical sensorimotor activity which has been lost due to an edentulous state. Such changes are either feeble or absent after the placement of a conventional denture. In the present study, we test this hypothesis using blood oxygen level-dependent (BOLD) activity on functional MRI (fMRI) as a bio-surrogate. Materials and Methods: fMRI was performed in 12 consecutive edentulous subjects (mean age = 59.2 years) after the placement of a conventional complete denture (CD) and subsequently after intraoral dental implantation (IOD). The semi-quantitative data of the BOLD activity was compiled to depict the activation seen in both scenarios in six anatomical regions. Statistical analysis was done to evaluate the significance of enhancement in BOLD activity in these regions in patients having an IOD as compared to those having a CD. Results: The enhancement of BOLD activity on fMRI after placement of an IOD was much more significant as compared to that noted with CD. Using Wilcoxon's signed-rank test the nonparametric data showed a significant positive elevation in global and regional assigned mean ranks of BOLD activity. Conclusion: Intraoral implantation leads to a significant elevation in the BOLD activity of the sensorimotor cortex as compared to the placement of a conventional CD. © 2021 Wolters Kluwer Medknow Publications. All rights reserved.
Evaluation of active tactile sensibility in a single-tooth implant opposing a natural tooth with either an immediate or delayed functional loading protocol: A parallel design clinical study
(Elsevier Inc., 2024) Kumari Deepika; Atul Bhatnagar; Ankita Singh; Romesh Soni
Statement of problem: High primary stability makes immediate loading more predictable, but immediately loaded implants are subjected to higher stresses and strains during the healing phase than implants that are left to heal for 3 months. Whether an earlier sensory-motor phenomenon with an immediate loading protocol helps to reduce the risk of overloading at the implant-bone interface is unclear. Purpose: The purpose of this concurrent parallel design clinical study was to evaluate and compare active tactile sensibility for a single-tooth implant opposing a natural tooth in the mandibular posterior region with either a delayed or immediate functional loading -protocol. Material and methods: In this parallel group randomized trial, 2 test groups were formed: the DL group comprised 20 participants with the delayed loading protocol (loading after 3 months), and the IL group comprised 20 participants with the immediate loading protocol (loading within 2 days). Natural tooth-to-tooth contact on the side contralateral to the implant site (split mouth) in both test groups was used as a control to evaluate active tactile sensibility, which was evaluated in the test and control sites of both groups by using interocclusal articulating foils of varying thickness in maximum intercuspation. Active tactile sensibility was compared between the DL and IL groups at 3 and 6 months of follow-up. The nonparametric Mann-Whitney test was used for intergroup comparisons (P=.05). Results: A significant difference was found for 8-μm- and 12-μm-thick articulating foil at 3 months and for 8-μm-thick foil at 6 months (P<.05), indicating a difference in active tactile sensibility between the DL and IL groups. No implant failure was recorded in this short clinical study. Conclusions: An immediate loading protocol can be performed in implants with sufficient primary stability. Upon loading, the IL group has shown more active tactile perception than the DL group. © 2022 Editorial Council for the Journal of Prosthetic Dentistry
Evaluation of efficacy of platelet-rich fibrin membrane and bone graft in coverage of immediate dental implant in esthetic zone: An in vivo study
(Wolters Kluwer Medknow Publications, 2020) Romesh Soni; Aditi Priya; Rahul Agrawal; Atul Bhatnagar; Lakshya Kumar
Objective: This study compared and evaluated the clinical and radiographic results of guided bone regeneration using platelet-rich fibrin (PRF) and collagen membrane as barrier membrane in immediately placed implants with severe buccal bone defect (with respect to marginal bone level, implant stability quotient [ISQ]), and histological analysis of new bone formation. Materials and Methods: Sixteen implants were placed in patients requiring immediate implant placement and having a buccal wall defect and randomly divided into two groups one receiving PRF membranes and other collagen membrane. The sites were grafted with bone-substitute material in both the groups. After 4 months, at the time of second-stage surgery, implant stability is measured by Osstell Mentor, crestal bone level on mesial and distal sides of implant by digital intraoral periapical, buccal defect clinically by probe and histological analysis of biopsied bone. Results: The results were insignificant and comparable in both the groups when comparison was made between the groups. The mean buccal defect, mean values of average ISQ, crestal bone level in both the groups at baseline and after 4 months were compared. No significant difference between both the groups was found after 4 months. Bone quality seemed to be equal in both groups after histological analysis. Within the limits of the study, both the groups had shown similar results in all criteria. Conclusion: Within the limitation of the study, it can be concluded that both the treatment modalities are successful in terms of buccal defect reduction, stability, and increase in crestal bone level. © 2020 National Journal of Maxillofacial Surgery.
Immediate placement of implant in fresh extraction socket with early loading
(Wolters Kluwer Medknow Publications, 2012) Archana Singh; Aratee Gupta; Ashish Yadav; T.P. Chaturvedi; Atul Bhatnagar; B.P. Singh
Implant placement in maxillary anterior region has most aesthetic challenges in implant dentistry because tooth loss lead to bone resorption and collapse of gingival architecture, which lead to aesthetic compromise and inadequate bone for implant placement. Immediate implant placement into fresh extraction socket reduces the treatment time, cost, preserved the gingival aesthetic and increases the comfort of the patient. This article describes the procedure for immediate implant placement in fresh extraction socket and early loading of implant with zirconia crown. Clinical and radiographic examination revealed width and length of the tooth for selecting implant size and design. Cement retained zirconia crown was used for early loading. Implant was successfully loaded and was functional during 36 months follow up period. Immediate placement and early loading of dental implant provides advantages like fewer surgical procedures, shorter treatment time, and improved aesthetic and psychological confidence. © 2012 Wolters Kluwer Medknow Publications. All rights reserved.
Influence of Surface Nano-Structuring on Microstructure, Corrosion Behavior and Osteoblast Response of Commercially Pure Titanium Treated Through Ultrasonic Shot Peening
(Springer, 2022) Pankaj Chauhan; Yagnesh Shadangi; Atul Bhatnagar; Vakil Singh; Kausik Chattopadhyay
Commercially pure titanium (Cp-Ti) is a widely accepted material for dental implants. Increases in surface roughness of these implants enhance osseointegration and result in better fixation with bone. Ultrasonic shot peening (USSP) is known to be an effective process of surface modification. This work is concerned with effect of USSP on modifications of the microstructure, surface topography, and corrosion behavior of Cp-Ti. The samples were USSPed for prolonged duration (30 min and 60 min) with both 1-mm and 3-mm diameter 100C6 steel balls. The thermal stability of the USSPed Cp-Ti was studied by stress relieving (SR) treatment at 500°C for 1 h. The surface roughness of the USSPed samples was increased and grains in the surface region were refined to nanoscale. The potentiodynamic polarization study showed significant increases in corrosion resistance of the USSPed samples. Further, enhanced osteoblast response was also observed for USSPed samples with and without SR. © 2022, The Minerals, Metals & Materials Society.
Lateral augmentation of the posterior edentulous mandible: A retrospective single arm comparison of ridge split, block bone grafts and guided bone regeneration
(John Wiley and Sons Inc, 2022) Rathindra Nath Bera; Naresh Kumar Sharma; Bappaditya Bhattacharjee; Atul Bhatnagar; Puvvadi Gopalakrishna Naveen Kumar; Ananta Kusumakar
Background: A deficient hard and soft tissue at the surgical site is a definitive challenge for dental implant placement. Commonly used procedures for augmentation include block bone grafts, guided bone regeneration, distraction, ridge expansion, ridge split, sandwich osteotomy, etc. The current study evaluates three techniques employed for horizontal augmentation of the mandible. Methods: A retrospective chart review was conducted for patients reconstructed with either block bone (A), guided bone regeneration (B), or ridge split (C) for lateral augmentation of posterior mandible. The primary outcome variables assessed were immediate postoperative bone width and bone width after 4 months, bone gain and resorption. Complications were evaluated as secondary outcomes. ANOVA and post hoc turkey tests were used for statistical analysis. A p-value of <0.05 was considered as statistically significant. Results: A total of 250 patient records were included in the study. Group C had a mean bone gain of 5.8649 ± 0.6520 mm statistically significant from others. Resorption was maximum in Group B 1.1612 ± 0.2821 mm. Iliac crest graft gave a mean 5.7285 ± 0.1823 mm bone gain. Overall no difference in bone gain between particulate or block interposition. Discussion: Grafts from intraoral sites are comparable in terms of resorption. ARS considerably provides better augmentation compared to GBR and onlays. Conclusion: Ridge split followed by onlay block bone grafting provides the best outcomes. Ramus and symphysis grafts are comparable. Iliac grafts are still the best for significant augmentations. Guided bone regeneration suffers maximum resorption. © 2021 The British Association of Oral Surgeons and John Wiley & Sons Ltd
Long COVID-19: Rehabilitative and Restorative Challenges
(Jaypee Brothers Medical Publishers (P) Ltd, 2021) Atul Bhatnagar
[No abstract available]
Oral rehabilitation of segmental mandibulectomy patient with osseointegrated dental implant
(Medknow Publications, 2014) Archana Singh; Atul Bhatnagar; Rajesh Bansal; B.P. Singh
Surgical management of oral cancer lesions results in explicit aesthetic and functional disfigurement, including facial deformity, loss of hard and soft tissue, impaired speech, swallowing and mastication, which modify the patient's self-image and quality-of-life. Recent advances in head and neck reconstruction techniques and dental implant based prosthetic rehabilitation may significantly improve the quality-of-life and self-esteem for such post-surgery patients. This clinical report describes rehabilitation of oral cancer patient having segmental mandibulectomy with implant-supported fixed partial denture.
Peri-implant stress distribution assessment of various attachment systems for implant supported overdenture prosthesis by finite element analysis – A systematic review
(Elsevier B.V., 2022) Bappaditya Bhattacharjee; Ritu Saneja; Ankita Singh; Pavan Kumar Dubey; Atul Bhatnagar
Background: Various attachments like ball, bar-clip, magnetic attachments are used in implant supported overdentures. Finite Element Analysis (FEA) a newly innovated technology has been used in dental implantology to evaluate stress distribution patterns. There is little evidence available regarding the stress distribution in peri-implant region for implant supported overdentures. The purpose of the review was to generate scientific evidence on peri-implant stress distribution in FEA model with different types of attachments employed in implant supported overdentures. Materials and methods: Systematic review was conducted as per the Preferred Reporting Items for Systematic Reviews Guidelines and Meta-Analyses statement (PRISMA). A comprehensive search was undertaken by two reviewers from January 2020 to June 2020 with no year limits to published articles. Only in-vitro FEA studies were included. Following electronic databases were searched for published studies- PubMed, Web of Science. Characteristics of the studies tabulated and analysis of articles was done to compare different attachment systems. Results: Locator attachments showed better stress distribution than ball attachment system in all the studies but one. Two studies showed results in favour of ball attachment compared to bar-clip attachment system when stress was evaluated distal to the implants. No significant difference in terms of stress concentration could be generated between ball versus magnetic/equator versus locator attachment system due to less number of studies and conflicting results. Conclusion: Various studies showed different results due to heterogenicity in selected attachment systems and study designs. Locator attachments showed favourable stress distribution around peri-implant bone than other attachments. © 2022 Craniofacial Research Foundation