scholarly journals A Comparison Study of Marginal and Internal Fit Assessment Methods for Fixed Dental Prostheses

2019 ◽  
Vol 8 (6) ◽  
pp. 785 ◽  
Author(s):  
Keunbada Son ◽  
Sangbong Lee ◽  
Seok Hyon Kang ◽  
Jaeseok Park ◽  
Kyu-Bok Lee ◽  
...  
Keyword(s):  
Assessment Methods ◽  
Comparison Study ◽  
Micro Computed Tomography ◽  
Replica Technique ◽  
Cross Sectional ◽  
Mean Values ◽  
Axial Angle ◽  
Dental Prostheses ◽  
Fixed Dental Prostheses ◽  
Internal Fit

Numerous studies have previously evaluated the marginal and internal fit of fixed prostheses; however, few reports have performed an objective comparison of the various methods used for their assessment. The purpose of this study was to compare five marginal and internal fit assessment methods for fixed prostheses. A specially designed sample was used to measure the marginal and internal fit of the prosthesis according to the cross-sectional method (CSM), silicone replica technique (SRT), triple scan method (TSM), micro-computed tomography (MCT), and optical coherence tomography (OCT). The five methods showed significant differences in the four regions that were assessed (p < 0.001). The marginal, axial, angle, and occlusal regions showed low mean values: CSM (23.2 µm), TSM (56.3 µm), MCT (84.3 µm), and MCT (102.6 µm), respectively. The marginal fit for each method was in the range of 23.2–83.4 µm and internal fit (axial, angle, and occlusal) ranged from 44.8–95.9 µm, 84.3–128.6 µm, and 102.6–140.5 µm, respectively. The marginal and internal fit showed significant differences depending on the method. Even if the assessment values of the marginal and internal fit are found to be in the allowable clinical range, the differences in the values according to the method should be considered.

scholarly journals DENTAL PROSTHESIS;

2018 ◽  
Vol 25 (08) ◽  
pp. 1261-1264
Author(s):  
Wasiq Riaz ◽  
Ayesha Aslam ◽  
Sara Aziz
Keyword(s):  
Survival Rates ◽  
Cross Sectional Study ◽  
Class I ◽  
High Survival ◽  
Cross Sectional ◽  
Dental Prostheses ◽  
History Of ◽  
Fixed Dental Prostheses ◽  
History Of Use ◽  
Study Setting

Introduction: Fixed dental prostheses (FDPs) are still preferred owing to theirdurability, esthetics, cost-effectiveness, adequate retention and lack of a surgical procedure.These restorations generally demonstrate longer life and durability in clinical service. Despitethe high survival rates, FDP complications are frequently encountered. Although severalstudies have reported on complications associated with FDPs, there is a lack of a standardand universal reporting system for FDP failures. Objectives: To evaluate FDP failures using aneasy classification scheme relevant to all conventional FDP failures. To assess the prevalenceof FDP failures based on this system. Study Design: Cross-sectional study. Setting: MargallaInstitute of Health Sciences (MIHS), Rawalpindi. Period: From 20th July 2014 to 20th January2015. Materials and Methods: Subjects reporting to the outpatient department with complaintsof failed crowns or bridges were included in the study. FDP failures were classified accordingto Manappallil’s classification. Data was analyzed using SPSS version 24. Descriptive statisticswere calculated. Results: Majority (31.6%) of the FDP failures were classified as Class I failureswhile the second most common FDP failures belonged to Class IV with a prevalence of 30.1%.Majority of the study subjects had been wearing FDPs for a period of 2 – 5 years while a few(2%) reported a history of use of FDP for more than 15 years. Conclusion: Class I failures arethe most prevalent failures in FPDs.

scholarly journals Marginal and Internal Fit of Cobalt-Chromium Fixed Dental Prostheses Generated from Digital and Conventional Impressions

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Per Svanborg ◽  
Henrik Skjerven ◽  
Pablo Carlsson ◽  
Alf Eliasson ◽  
Stig Karlsson ◽  
...  
Keyword(s):  
Digital Impression ◽  
Cobalt Chromium ◽  
Marginal Gap ◽  
Impression Material ◽  
Dental Prostheses ◽  
Digital Impressions ◽  
Fixed Dental Prostheses ◽  
Internal Fit ◽  
Cervical Area ◽  
Scan Protocol

Objectives. Digital impressions are increasingly used and have the potential to avoid the problem of inaccurate impressions. Only a few studies to verify the accuracy of digital impressions have been performed. The purpose of this study was to compare the marginal and internal fit of 3-unit tooth supported fixed dental prostheses (FDPs) fabricated from digital and conventional impressions.Methods. Ten FDPs were produced from digital impressions using the iTero system and 10 FDPs were produced using vinyl polysiloxane (VPS) impression material. A triple-scan protocol and CAD software were used for measuring and calculating discrepancies of the FDPs at 3 standard areas: mean internal discrepancy, absolute marginal gap, and cervical area discrepancy. The Mann-Whitney U test was used for analyzing the results.Results. For conventional and digital impressions, respectively, FDPs had an absolute marginal gap of 147 μm and 142 μm, cervical area discrepancy of 69 μm and 44 μm, and mean internal discrepancy of 117 μm and 93 μm. The differences were statistically significant in the cervical and internal areas (P<0.001).Significance. The results indicated that the digital impression technique is more exact and can generate 3-unit FDPs with a significantly closer fit compared to the VPS technique.

scholarly journals Chewing Discomfort According to Dental Prosthesis Type in 12,802 Adults: A Cross-Sectional Study

2020 ◽  
Vol 18 (1) ◽  
pp. 71
Author(s):  
Jae-Hyun Lee ◽  
Da Hye Kim ◽  
Yong-Gyu Park ◽  
Su Young Lee
Keyword(s):  
Confidence Intervals ◽  
Cross Sectional Study ◽  
Dental Prosthesis ◽  
Multivariable Logistic Regression Analysis ◽  
Odds Ratios ◽  
Cross Sectional ◽  
South Korean ◽  
Korean Adults ◽  
Dental Prostheses ◽  
Fixed Dental Prostheses

This study examined the prevalence of self-perceived chewing discomfort depending on the type of dental prosthesis used in South Korean adults. The subjects were 12,802 people over 20 years of age who participated in a health interview and dental examination. Chewing discomfort was examined using a self-assessed report with a structured questionnaire. Using multivariable logistic regression analysis, adjusted odds ratios were evaluated along with their 95% confidence intervals (α = 0.05). After adjusting for covariates, including age, gender, smoking, drinking, hypertension, diabetes, body mass index, education, income, and toothbrushing frequency, the odds ratios (95% confidence intervals) for chewing discomfort in groups without a dental prosthesis, with fixed dental prostheses, with removable partial dentures, and with removable complete dentures were 1 (reference), 1.363 (1.213–1.532), 2.275 (1.879–2.753), and 2.483 (1.929–3.197), respectively. The association between the prevalence of chewing discomfort and the type of dental prosthesis used was statistically significant even after adjusting for various confounders (p < 0.0001). The type of dental prosthesis was related to chewing discomfort among South Korean adults.

scholarly journals METAL RESTORATIONS;

2019 ◽  
Vol 26 (04) ◽  
Author(s):  
Lubna Memon ◽  
Muhammad Rizwan Memon ◽  
Aamir Mehmood Butt ◽  
Madiha Waqas Memon
Keyword(s):  
Age Groups ◽  
Sampling Technique ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Female Ratio ◽  
Dental Prostheses ◽  
Metal Ceramic ◽  
Fixed Dental Prostheses ◽  
Fixed Prosthesis ◽  
Age Range

Introduction: Aesthetic is the most important consideration for the replacement of missing teeth. Traditional metal-ceramic fixed dental prostheses are stronger, clinically recognized, and reliable and will therefore persist the first consideration. Study Design: Cross sectional study. Setting: Liaquat University of Medical and Health Sciences, Jamshoro. Period: October 2015 to September 2016. Material and Methods: Using non probability consecutive sampling technique. Data from 120 patients regarding effect of age on appearance after providing metal-ceramic fixed prosthesis were collected using the method of interview and examination. Results: The male to female ratio was 1:1.4 with a mean age of 30 years and standard deviation (SD) 10.88. 120 Patients were divided in four age groups. Out of Sixty-six patients with age range from 19 to 30 years, thirty-eight were found to be completely satisfied. Out of 21 patients of 31-40 years old, eighteen were aesthetically satisfied. In another group comprises of 24 patients with an age range 41-50, seventeen showed completely satisfaction. Another group, age range from 51-60 that showed 9 patients, in which six patients were satisfied with fixed prosthesis. Conclusion: Most of the patients in this study were satisfied after providing prostheses. Middle age (31-40years) patients showed more satisfaction comparative to other age groups.

The Causes of Marginal Discrepancy of Fixed Dental Prostheses: A Cross-Sectional Study

2019 ◽  
Vol 5 (2) ◽  
pp. 41-45
Author(s):  
Asma Ismail ◽  
◽  
Yosra Gassara ◽  
Dalenda Hadyaoui ◽  
Mounir Cherif ◽  
...  
Keyword(s):  
Cross Sectional Study ◽  
Sectional Study ◽  
Cross Sectional ◽  
Dental Prostheses ◽  
Fixed Dental Prostheses ◽  
Marginal Discrepancy
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