scholarly journals Dimensional Changes of Denture Base for Maxillary Complete Denture Processed with Injection Type Microwave-cured Resin.

1999 ◽  
Vol 43 (2) ◽  
pp. 279-285
Author(s):  
Shinsuke Koyanagi ◽  
Xiao Rong Wang ◽  
Yutaka Takahashi ◽  
Tetsuya Habu
Keyword(s):  
Complete Denture ◽  
Denture Base ◽  
Dimensional Changes ◽  
Injection Type

scholarly journals Stereolithography vs. Direct Light Processing for Rapid Manufacturing of Complete Denture Bases: An In Vitro Accuracy Analysis

2021 ◽  
Vol 10 (5) ◽  
pp. 1070 ◽  
Author(s):  
Alexey Unkovskiy ◽  
Franziska Schmidt ◽  
Florian Beuer ◽  
Ping Li ◽  
Sebastian Spintzyk ◽  
...  
Keyword(s):  
Root Mean Square ◽  
Complete Denture ◽  
Rapid Manufacturing ◽  
Accuracy Analysis ◽  
Mean Square ◽  
Heat Map ◽  
Denture Base ◽  
Multiple Comparison Test ◽  
Direct Light

The topical literature lacks any comparison between stereolithography (SLA) and direct light processing (DLP) printing methods with regard to the accuracy of complete denture base fabrication, thereby utilizing materials certified for this purpose. In order to investigate this aspect, 15 denture bases were printed with SLA and DLP methods using three build angles: 0°, 45° and 90°. The dentures were digitalized using a laboratory scanner (D2000, 3Shape) and analyzed in analyzing software (Geomagic Control X, 3D systems). Differences between 3D datasets were measured using the root mean square (RMS) value for trueness and precision and mean and maximum deviations were obtained for each denture base. The data were statistically analyzed using two-way ANOVA and Tukey’s multiple comparison test. A heat map was generated to display the locations of the deviations within the intaglio surface. The overall tendency indicated that SLA denture bases had significantly higher trueness for most build angles compared to DLP (p < 0.001). The 90° build angle may provide the best trueness for both SLA and DLP. With regard to precision, statistically significant differences were found in the build angles only. Higher precision was revealed in the DLP angle of 0° in comparison to the 45° and 90° angles.

scholarly journals SINGLE COMPLETE DENTURE IN MANDIBULAR ARCH OPPOSING NATURAL DENTITION– A CASE REPORT

2013 ◽  
Vol 03 (01) ◽  
pp. 72-75
Author(s):  
Laxman Singh Kaira ◽  
Richa Singh
Keyword(s):  
Case Report ◽  
Methyl Methacrylate ◽  
Complete Denture ◽  
Prosthetic Rehabilitation ◽  
Denture Base ◽  
Mandibular Arch ◽  
Full Complement ◽  
Natural Teeth ◽  
Successful Rehabilitation ◽  
Natural Dentition

AbstractSeveral difficulties are encountered in providing a successful, single complete denture treatment. This case report deals with successful rehabilitation of completely resorbed mandibular ridge opposing a full complement of natural teeth prosthetically incorporating metal denture base in place of the conventional Poly Methyl Methacrylate material to combat the masticatory forces from natural dentition and improve the longevity of the prosthetic rehabilitation, at the same time improving the strength of the mandibular denture base.

SEM Evaluation of Denture Base Materials Used in Clinical Practice

2016 ◽  
Vol 695 ◽  
pp. 91-95
Author(s):  
Alexandru Titus Farcașiu ◽  
Iulian Antoniac ◽  
Aurora Antoniac ◽  
Cătălina Farcașiu
Keyword(s):  
Surface Topography ◽  
Clinical Importance ◽  
Class Iii ◽  
Denture Base ◽  
Base Materials ◽  
Heat Cure ◽  
Injection Type ◽  
Materials Used ◽  
Injection Unit ◽  
Bacterial Plaque

Removable dentures aim to improve masticatory function, esthetics and phonetics. Different materials have been used as denture base materials but poly(methyl methacrylate) (PMMA) is most frequently used in most countries. Surface related properties of denture base materials (roughness, surface free energy, wettability, hydrophobicity, etc.) are of clinical importance since they affect plaque accumulation and staining. Surface roughness specifically influences the adhesion and retention of Candida Albicaans, which has a particular importance in denture-induced stomatitis pathogenesis. Bacterial plaque retention directly affects oral hygiene even if the patient achieves an appropriate cleaning of the denture. Ideally, denture base materials should be smooth so plaque adherence is reduced or even avoided. Test specimens of four heat polymerized materials were obtained by a classical press-pack dough molding technique of 1.5 mm thick wax-plate flasked in class III Moldano followed by the recommended polymerization regime. One of the materials was processed through a fast polymerization cycle. Injection-type materials were automatically produced using a dedicated injection unit. All plates were sectioned in 10 mm x 10 mm samples. No finishing protocol was applied. The selected specimens were examined under field emission scanning electron microscope (SEM). A large variation of surface topography was recorded between materials. There were visual differences between the four heat polymerized resins but also between the two injection-type materials. Surface topography was also influenced by the polymerization regime. Within the limitations of our study, we found that surface topography is influenced by the chemical composition of each material, the heat cure cycle and the processing method.

scholarly journals Effect of the processing cycle on dimensional changes of heat-polymerized denture base resins

2015 ◽  
Vol 12 (4) ◽  
pp. 301 ◽  
Author(s):  
Farahnaz Nejatidanesh ◽  
Ghazal Savabi ◽  
Omid Savabi ◽  
Badrosadat Dastgheib
Keyword(s):  
Denture Base ◽  
Dimensional Changes ◽  
Processing Cycle

scholarly journals The Biomechanical Effect of Different Denture Base Materials on the Articular Disc in Complete Denture Wearers: A Finite Element Analysis

2015 ◽  
Vol 3 (3) ◽  
pp. 455-461
Author(s):  
Mohamed M. El-Zawahry ◽  
Ahmed A. El-Ragi ◽  
Mohamed I. El-Anwar ◽  
Eman Mostafa Ahmed Ibraheem
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Base Material ◽  
Acrylic Resin ◽  
Complete Denture ◽  
Articular Disc ◽  
Stress Strain ◽  
Element Analysis ◽  
Denture Base ◽  
Base Materials

AIM: The objective of the present study was to evaluate the effect of different denture base materials on the stress distribution in TMJ articular disc (AD) in complete denture wearers.MATERIAL AND METHODS: Two three dimensional Finite Element (FEA) models of an individual temporomandibular joint (TMJ) were built on the basis CT scan. The FEA model consisted of four parts: the condyle, the articular disc, the denture base, and the articular eminence skull. Acrylic resin and chrome-cobalt denture base materials were studied. Static loading of 300N was vertically applied to the central fossa of the mandibular second premolar. Stress and strain were calculated to characterize the stress/strain patterns in the disc.RESULTS: The maximum tensile stresses were observed in the anterior and posterior bands of (AD) on load application with the two denture base materials. The superior boundaries of the glenoid fossa showed lower stress than those on the inferior boundaries facing the condyle.CONCLUSIONS: Within the limitations of the present study it may be concluded that: The denture base material may a have an effect in stress-strain pattern in TMJ articular disc. The stiffer denture base material, the better the distribution of the load to the underling mandibular supporting structures & reducing stresses induced in the articular disc.

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