The Journal of Indian Prosthodontic Society最新文献

Purpose: When compared to conventional freehand procedures, the development of computer-assisted techniques in dental implant insertion surgery has significantly changed traditional practices, bringing about a movement toward improved precision and predictability. The purpose of this study was to evaluate the efficiency of traditional freehand methods versus static-dynamic computer-assisted dental implant placement procedures in terms of accuracy and precision.

Methodology: This study followed Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, screening 438 articles from databases such as PubMed, Embase, Scopus, and Web of Science. The inclusion criteria were randomized and nonrandomized control trials, case controls and retrospective case studies, focusing on platform deviation, angular deviation, and apical deviation in dynamic, static, and freehand surgeries. Eleven studies were selected for a review, with nine studies included in the meta-analysis. Heterogeneity was analyzed using appropriate statistical models to ensure robust findings and reliability of the results.

Results: The meta-analysis included nine studies comparing dental implant accuracy across dynamic, static, and freehand placement techniques. Dynamic systems showed superior accuracy, with platform deviations of 0.64-1.73 mm, angular deviations of 2.49°-5.75°, and apical deviations of 0.89-1.86 mm. Static systems showed slightly greater variability, with platform deviations of 0.97-2.34 mm and angular deviations of 2.2°-4.98°. Freehand techniques demonstrated the highest deviations, with platform deviations up to 3.48 mm and angular deviations up to 10.09°. Prediction intervals indicated consistent superiority of dynamic guidance across metrics.

Conclusion: When compared to static and freehand methods, dynamic computer-assisted dental implant surgery provides more accuracy and precision. In implant dentistry, adopting dynamic guided systems is essential to attaining the best clinical results and raising patient satisfaction.

Aim: This study aimed to evaluate the effect of partially edentulous ()PED condition on lung function through spirometry tests and comparison of airflow rates between dentulous and PED subjects.

Settings and design: The study design was a cross-sectional study conducted in the department of prosthodontics.

Materials and methods: Twenty-eight dentulous and 28 PED patients with an age range of 25-50 years were included in the study. Patients with missing more than 3 posterior teeth were considered PED. All have undergone spirometric evaluation.

Statistical analysis used: Independent t-test was used.

Results: In all three spirometric measures (forced vital capacity [FVC], forced expiratory volume in 1 s [FEV1], and peak expiratory flow rate [PEFR]), the PED participants had significantly lower FVC, FEV1 (P = 0.0005), and PEFR (P = 0.032) airflow rates than dentulous participants, and males had higher airflow rates than females.

Conclusions: FVC, FEV1, and PEFR airflow rates were lower in PED individuals. The lower airflow rates could suggest the possible tendency to develop chronic obstructive pulmonary disease (COPD).

Aims: To assess the role of oral health literacy (OHL) in demand for oral healthcare services for missing teeth replacement among adult patients who are visiting the outpatient department of a teaching hospital, Andhra Pradesh, India.

Settings and design: This cross-sectional study was conducted in a dental teaching institute, Andhra Pradesh, southern part of India.

Materials and methods: Based on the inclusion and exclusion criteria, a sample of adult participants was selected through systematic random method from the patients who visited the outpatient department. Data from 740 participants were included in the final analysis. A prevalidated questionnaire adopted from Oral Health Literacy Adult Questionnaire (OHL-AQ) was used for data collection and american dental association (ADA) type IV clinical examination was used for recording missing teeth.

Statistical analysis used: Bivariate tests such as the Chi-square test, Mann-Whitney's test, and multinomial logistic regression analysis were used to assess the predictors for the demand for the replacement of missing teeth.

Results: The overall demand for replacement of missing teeth was 46.22%. 37.88% of participants had adequate OHL, 24.72% had marginal OHL, and 37.4% had inadequate OHL. Demand for replacement was more in females than males (57.6% vs. 35.6%), which was statistically significant (P = 0.00). Participants with missing anterior teeth had nearly twice the demand for prosthodontic care (P = 0.046). Participants with adequate OHL had 3.63 times more demand for prosthodontic replacement of missing teeth (odds ratio = 3.63 and P = 0.002).

Conclusion: OHL has a positive role in the demand for prosthodontic replacement of missing teeth along with gender and anterior missing teeth. Oral health policies should incorporate strategies to improve OHL.

Aims: To compare the accuracy of marginal fit of CAD-CAM endocrown with two different preparation forms, i.e., endocrown with ferrule and endocrown without ferrule.

Settings and design: Various studies have opined on the impact of preparation form on the marginal fit of endocrown, but studies on the effect on the marginal fit of digitally milled endocrown with and without ferrule are sparse.

Materials and methods: Total of 30 typodont were sectioned 3 mm above the cemento-enamel junction, and central cavity was prepared to depict a severely destructed tooth. The typodonts were divided into two groups: Group 1 contained specimens for endocrown without ferrule (WoF); Group 2 contained specimens for endocrown with ferrule (WF). The typodonts were prepared based on standard preparation. The specimens were then scanned using intraoral scanner, and the stereolithography (STL) was generated. Endocrowns were designed in the Exocad software using a digital library. The STL file format is translated into millable data file format (CNC- Computer numerical control) in the inLAB MC X5 Milling machine. The marginal fit of endocrowns was then assessed in the stereomicroscope.

Statistical analysis: The data was analysed with a digital image analyser. The result was generated using a two-way ANOVA test. The significance level was set at P ≤ 0.05.

Results: In the present study, the marginal fit of WoF showed a superior marginal fit than WF. A statistically significant difference was seen in the marginal fit of two endocrowns, with a higher marginal discrepancy observed in the endocrown with the ferrule. The P value for the difference in the means of the marginal gap without and with ferrule (-13.42) is zero. Maximum marginal gap of 96 micron is observed for with ferrule (WF) design at location B. Minimum marginal gap of 29 micron is observed for without ferrule (WoF) at location D.

Conclusions: Endocrown without a ferrule can provide a better marginal fit and can contribute to the long-term survival of restoration.

Statement of problem: There is lack of evidence of studies conducted to compare the integration of soft and hard tissues of conventional implants and porous tantalum trabecular metal (PTTM dental implants).

Purpose: This systematic review assessed the clinical outcomes evaluating the hard and soft-tissue parameters for PTTM dental implants when compared with conventional titanium dental implants.

Materials and methods: The Preferred Reporting Items for Systematic review based on PRISMA 2020 checklist was used as guideline for reporting this protocol. The search was conducted in SCOPUS, PUBMED, Cochrane library, and EMBASE databases for the studies published from January 1, 2010, to January 1, 2023. The chosen publications' cross-references were further examined, and studies whose whole texts were not available through the computerized search were manually looked up.

Results: Through search strategy a total of 1152 articles were yielded. After screening titles and abstracts, 9 articles were further screened for full text. After critical analysis, according to the eligibility criteria of this review, 7 articles were included in this systematic review for data extraction. Four studies revealed mean of 98.8% survival rate for trabecular implants. Histologically, 2 studies showed upregulation of bone morphogenic proteins, collagens, and growth factors with respect to trabecular dental implants.

Conclusion: From this study, it can be concluded that PTTM dental implants showed a better osseoincorporation potential than titanium implants. However, a longer follow-up period is required to assess its true potential.

Aim: The purpose of this in vitro study was to compare the marginal fit of various three-dimensional (3D) printed and milled polymethylmethacrylate (PMMA) dental prostheses.

Settings and design: The study was conducted in an in vitro study setting.

Materials and methods: With a sample size of 45 for each fabrication method, this investigation compared the marginal fit of milled (Group 1) and 3D printed (Group 2) PMMA dental prostheses across different designs. The selection of samples was based on G*Power calculations. Tooth preparations were conducted on a typodont jaw set, followed by digital scanning and design processes. Computer-aided design and computer-aided manufacturing milling and 3D printing were employed for the fabrication of prostheses. The assessment of marginal accuracy at specific points was performed using a stereomicroscope.

Statistical analysis used: Independent t-tests were used to evaluate marginal discrepancies between milled and printed prosthetic designs at specific tooth surfaces. Univariate analysis of variance assessed marginal discrepancies across prosthesis designs and fabrication methods, with the Tukey post hoc test for significantly different results (α =0.05).

Results: Milled single crowns exhibited superior accuracy (61.50 ± 4.852 μ) compared to printed ones (65.74 ± 7.311 μ) (t = -1.868, P = 0.037). Similar trends were observed for other designs, emphasizing the impact of both prosthesis design and fabrication method on marginal fit. Notable discrepancies were found on the distal surfaces of the anterior bridge crossing midline design (t = -3.262, P = 0.003).

Conclusion: Milled prostheses exhibited superior marginal fit as compared to 3D printed prostheses, with differences within clinically acceptable limits.

Aim: The aim of this study was to compare the marginal accuracy of polyetheretherketone (PEEK) and zirconia copings fabricated using computer-aided design/computer-aided manufacturing (CAD/CAM) technology, and to assess the impact of their material properties on accuracy when produced with a 4-axis milling system under controlled conditions.

Settings and design: The study employed an in vitro design with a stainless steel die model featuring a 6 mm axial wall height, a 6-degree total occlusal convergence, and a radial shoulder finish line.

Materials and methods: Thirty stone dies were created from silicone impressions of the metal die and poured using type-IV dental stone. The dies were divided into two groups: Group-A (PEEK) copings and Group-B (zirconia) copings. All copings were fabricated using a CAD/CAM system. Vertical marginal accuracy was assessed with a stereomicroscope and image analysis software at ×20 magnification. The marginal gaP values were subjected to a student (independent) t-test for statistical analysis.

Statistical analysis used: The statistical analysis involved a student (independent) t-test to compare the marginal gaP values between Group A (PEEK) and Group B (zirconia).

Results: The mean marginal discrepancy for Group A (PEEK) and Group B (zirconia) was 92.84 μm ± 3.48 μm and 63.12 μm ± 31.47 μm, respectively. A statistically significant variation (t = 3.635, P = 0.001) between the groups was observed, indicating better marginal accuracy with zirconia copings compared to PEEK copings.

Conclusion: Both PEEK and zirconia copings demonstrated vertical marginal discrepancies within the clinically acceptable limit of <120 μm. However, zirconia copings exhibited superior marginal accuracy in this in vitro study.

Health-related quality of life (HRQOL) measures an individual's ability to function optimally in various aspects of life and their subjective sense of well-being across the physical, mental, and social dimensions of health. COVID-19-associated mucormycosis often necessitates aggressive surgical removal of infected tissues and restoration of the defect. Evaluating patient satisfaction and HRQOL following prosthodontic rehabilitation is essential for assessing the effectiveness of interventions on individuals dealing with their condition. This systematic review aimed to evaluate the impact of prosthodontic rehabilitation on the HRQOL of individuals affected by COVID-19-associated mucormycosis. The research strictly adhered to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines and was registered with the International Prospective Register of Systematic Reviews (PROSPERO 2023CRD42023495778). Comprehensive searches across databases such as PubMed, Cochrane Library, Google Scholar, and Semantic Scholar were done to include studies after the year 2020, written in English language, regardless of geographic location, which presented data on prosthodontic interventions for individuals affected by COVID-19-associated mucormycosis. Independently, the three authors conducted a comprehensive quality assessment of the selected studies using the National Heart Lung and Blood Institute (NHLBI) study quality assessment tool to gauge the risk of bias specifically for before-after (pre-post) studies lacking a control group. A total of 116 records were screened, out of which 109 records were excluded. Eight studies were included in the study. HRQOL assessment after prosthodontic intervention included functional, physical, social, and psychological limitations. Questionnaires that were included in the studies were the Obturator Functioning Scale, Appearance Anxiety Inventory, Patient Health Questionnaire, auditory perception analysis, Oral Health Impact Profile, and the Liverpool Oral Rehabilitation Questionnaire. The HRQOL was reported compositely in 2 out of 8 studies. There was an improvement after prosthodontic rehabilitation in all the studies. HRQOL in patients with COVID-19-associated mucormycosis shows improvement after prosthodontic rehabilitation. Obturators and zygomatic implant-supported prostheses are preferred options for rehabilitation in patients who have undergone maxillectomy due to COVID-19-associated mucormycosis. Prosthodontic rehabilitation has a positive impact on the HRQOL of individuals affected by COVID-19-associated mucormycosis improving their functional, physical, social, and psychological well-being.

Prosthetic rehabilitation in multifaceted dental abnormality needs sequential planning to ensure adaptation of oral and associated musculature. Reduction of tooth structure before adaptation of oral and associated components may complicate the treatment modality if compliance of the musculature is poor. Hence, the fabrication of over-provisional in esthetic rehabilitation enables to assess of the success of the treatment plan preoperatively before invasive trials. A 55-year-old male with a diagnosis of Category I loss of vertical dimension, according to Turner and Missirlian classification, required full mouth rehabilitation. The case report depicts the preoperative management of full mouth rehabilitation with direct chair-side technique using over-provisional to analyze the esthetic and functional changes. Restoration of esthetics is a complex task that needs patient satisfaction to achieve success. Over-provisional is a simplified method of establishing esthetics and functional rehabilitation. Esthetic and functional rehabilitation of an individual can be an easy transition when preoperative evaluation of the final prosthesis design is visually created intraorally.

Aim: This study aims to enhance the scannability of Type III alpha gypsum by incorporating an opacifier and to evaluate its effect on the LSE property.

Setting and design: In vitro - Comparative study.

Materials and methods: The base powder of Type III alpha gypsum was divided into three groups: Group I (100 g of base powder), Group II (90 g of base powder with 10 g of TiO2), and Group III (80 g of base powder with 20 g of TiO2). The study had two parts: First, scanning the mixtures to determine the best scannable material; second, testing for LSE using a plaster extensometer with 0.01 mm precision. Each group's scannability was assessed using a Medit lab scanner, and their LSE was measured.

Statistical analysis used: One-way ANOVA with Tukey's post-hoc test for multiple comparisons.

Results: Results showed that there was a statistical significance between the three groups. However, there was a decrease in the LSE with an increase in the concentration of the titanium dioxide (TiO2). Group III has shown superior scanning properties compared to the other groups.

Conclusion: Type III alpha gypsum reinforced with 20% TiO2 as an opacifier has exhibited superior scanning properties and there was a statistically significant decrease in the LSE between all three groups with increase in the concentrations of TiO2.