Clinical implications of elastomeric impression materials used for complete denture construction

Rameez, Muhammad; Razi, Shoaib; Farhan, Fatima; Kumar, B. S. Nanda; Rashid, Haroon

doi:10.4103/dmr.dmr_10_17

Cited by 9 publications

(7 citation statements)

References 46 publications

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“…By their use, accuracy of final impression is ensured as their rigidity reduces any potential for distortion. 19 In the current study, custom tray was being used at all colleges for secondary impressionmaking, which is in agreement with practices in the US, Turkey, the UK and Spain. 7,8,10,14 Border moulding in dental colleges in Pakistan was found to be done using green stick impression compound, which is a trend similar to British and Turkish schools.…”

Section: Discussionmentioning

confidence: 72%

Current trends in complete denture education in undergraduate dental colleges of Pakistan

Lone,

Kumar,

Musharraf

et al. 2023

J Pak Med Assoc

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Objective: To determine the current trends in complete denture education in undergraduate dental colleges. Method: The survey-based study was conducted in April and May 2020 at undergraduate dental colleges of Pakistan, and comprised heads of the Prosthodontics Department at all dental colleges across Pakistan having at least one batch of final year dental students. Data was collected using an online predesigned questionnaire that explored theoretical and practical teaching patterns of complete denture prosthodontics in the undergraduate years, and the materials and practices of students when constructing complete dentures in the clinics. The participants were given the option of choosing more than one option where needed. Data was analysed using SPSS 23. Results: Of the 49 subjects approached, 40(81.6%) returned the forms duly filled; 11(27.5%) from public-sector institutions and 29(72.5%) from the private sector. There were 26(65%) institutions which required that their undergraduate students fabricate 2-4 conventional complete dentures. In all 40(100%) colleges, faculty gave live clinical demonstrations before students fabricated conventional complete dentures in the outpatient departments. Teaching strategy included small group discussions in 25(62.5%) institutions. Green stick 40(100%), zinc oxide eugenol 40(100%) and impression compound 39(97.2%) were the materials of choice for various steps of impression making. In all the 40(100%) institutions, students fabricated conventional complete dentures during their prosthodontics rotation. Immediate, copy and overdentures were constructed by students in 8(20%), 3(7.5%) and 8(20%) institutions, respectively. Conclusions: Majority of the dental schools used similar impression materials and techniques for fabricating conventional complete dentures. Didactic teaching of conventional and unconventional complete dentures was being carried out at a huge majority of the dental institutions studied. Key Words: Current trends, Complete dentures, Undergraduate dental education.

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Section: Discussionmentioning

confidence: 72%

Current trends in complete denture education in undergraduate dental colleges of Pakistan

Lone,

Kumar,

Musharraf

et al. 2023

J Pak Med Assoc

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“…Notably, several impressionmaking methods have been suggested. [5][6][7][8][9][10][11][12] However, the most widely accepted method for open-mouth impression-making techniques is the selective pressure impression-making method using rubber-based impression material and a custom impression tray, which leads to the fabrication of definitive casts. 8,12,34,35 A preliminary cast, which results from a preliminary impression, is required to fabricate a custom impression tray.…”

Section: Discussionmentioning

confidence: 99%

“…[7][8][9] In contrast, the selective pressure impression-making approach aims to apply more pressure to stress-bearing areas and relieve pressure-sensitive areas. 5,[10][11][12] With the rapid development of intraoral scanners, direct digitization of the edentulous arch has become possible. Intraoral scanning is a method to obtain impressions; however, technically speaking, it produces a direct positive digital image display of the arch in a 3D file format.…”

mentioning

confidence: 99%

Comparison of tissue displacement in edentulous arches among three‐dimensional files obtained through different impression‐making methods: A retrospective study

Choi,

Kim,

Moon

et al. 2023

Journal of Prosthodontics

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PurposeTo retrospectively compare and analyze differences in tissue displacement of edentulous arches among three‐dimensional (3D) files obtained using various impression‐making techniques.Materials and MethodsFourteen patients who underwent prosthodontic treatment for edentulous arches at Yonsei University Dental Hospital between June 2020 and April 2023 were included in the study. Three types of 3D files were used for the evaluation of each arch: a 3D scan file of a definitive cast (Group DEF), a preliminary cast (Group PRE), and an intraoral scan file (Group IOS). The files were superimposed on a reference 3D scan file of the definitive cast group through best‐fit matching using metrology software. Seventeen measurement points (MP1‐4, RC1‐6, TB1‐2, and PPS1‐5 for the maxilla and RP1‐2, RC1‐7, BS1‐4, and LS1‐4 for the mandible) were selected for both the maxillary (n = 13) and mandibular arches (n = 6). The deviation considering the direction (DD) between the three groups and the absolute deviation (AD) between the three groups were recorded. Kruskal–Wallis and post‐hoc Mann–Whitney tests were used for statistical analyses (α = 0.05 and α = 0.0167, respectively).ResultsConcerning the DD values, at the RC4 point of the maxillary arch, Group PRE exhibited significantly higher values than Groups IOS (p = 0.006) and DEF (p < 0.001), and at the RC5 point of the maxillary arch, Group IOS exhibited significantly lower values than Groups PRE (p = 0.016) and DEF (p < 0.001). Group IOS showed significantly lower DD values in the mandibular arch than Group DEF at the RP2 and RC3 points (p < 0.167). The AD values in Groups PRE and IOS significantly differed from those in Group DEF (all p < 0.001) at all measurement points but did not exhibit significant differences between each other (p > 0.05).ConclusionsDifferent impression‐making methods yielded different amounts of tissue displacement. The tendency of 3D files regarding tissue displacement varied at certain residual ridge crest areas and retromolar pad areas. The absolute amount of tissue displacement observed in the intraoral scan data was comparable to that observed in the preliminary casts.This article is protected by copyright. All rights reserved

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“…Ideally, impression materials should exhibit hydrophilic properties. However, VPS materials were originally hydrophobic in nature, leading to changes in pouring bubble-free casts and obtaining full-arch impressions without voids [ 2 , 24 ].…”

Section: Reviewmentioning

confidence: 99%

“…Although these surfactants reduce the surface tension of the liquid, they do not affect the physical properties of VPS. Accordingly, relatively bubble-free casts can be achieved, but accurate impressions cannot be made in a wet environment [ 24 ]. Consequently, despite the claims of increased hydrophilicity, it should be emphasized that accurate impressions can only be obtained in dry conditions [ 1 ].…”

Section: Reviewmentioning

confidence: 99%

Addition Silicone Impressions in Fixed Prosthodontics: Clinical Standpoints

Madanshetty,

Guttal,

Meshramkar

et al. 2023

Cureus

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Addition silicones have revolutionized the field of fixed prosthodontics because of their dimensional stability, sufficient tear strength and excellent detail reproduction. This review study aims to provide a detailed description of the essential variables to be taken into account during the process of making addition silicone impressions in fixed prosthodontics. These variables include the selection of appropriate tray type, size, and fabrication; the use of tray adhesive; gingival displacement techniques; manipulation of the impression material; the choice of the impression material's viscosity; impression techniques; and the proper insertion, removal, disinfection, and pouring of the cast. Additionally, this review aims to help doctors produce high-quality impressions by empowering them to critically assess the impressions to spot mistakes and motivating them to redo impressions that have serious problems before submitting them to the laboratory.

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Clinical implications of elastomeric impression materials used for complete denture construction

Cited by 9 publications

References 46 publications

Current trends in complete denture education in undergraduate dental colleges of Pakistan

Current trends in complete denture education in undergraduate dental colleges of Pakistan

Comparison of tissue displacement in edentulous arches among three‐dimensional files obtained through different impression‐making methods: A retrospective study

Addition Silicone Impressions in Fixed Prosthodontics: Clinical Standpoints

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