Clinical Comparison of Polyvinyl Siloxane Impression for Fixed Partial Dentures using three Different Techniques
Journal Title: Journal of Advanced Medical and Dental Sciences Research - Year 2017, Vol 5, Issue 11
Abstract
Aim: To compare the defects present in impressions between three different techniques using hand mixing elastomers. Materials and methods: Three master impressions were made from each 64 crown preparations with three different techniques totalling to 168 master impressions. PVS impression material, putty (Aquasil ) and light-body (Reprosil) viscosity combinations were used for every patient with the three techniques i) single stage double mix technique ii) two stage technique with using a spacer and iii) two stage technique without using a spacer. The impressions were rated by two evaluators using Heine binocular magnifying loupe (2.3×) and the results tabulated. The results were presented as percentages. Kappa test was done to compare the obtained results. Results: Out of three techniques the least number of defects were shown by the single stage double mix technique with useable impressions of 96.42%and the two stage technique with using a spacer being the least favorable with usable impression of 86.25%. The two stage technique without using a spacer also had a result of 82.60%. Kappa test was used to compare the individual results. Between technique 1 and 2, there was fair significant agreement between the two methods (p<0.001). But when comparing between techniques 1 and 3 (p= 0.5) and techniques 2 and 3 (p= 0.881), there was insignificant weak agreement signifying that technique 2 impressions were not comparable with technique 1 and 3. Among the defects there was presence of 58 void (60.5%), 26 bubbles (27%) and 12 pulls (12.5%) and absence of any tears. The number of defects located at the margins were 68% and 32% were located at others areas beside the margins. All the pulls were present at the lingual/ palatal aspect of margins while 78% and 56% if voids and bubbles were present at the margins respectively. Conclusion: The single stage double mix technique and two stage technique without using a spacer had a more favorable outcome in comparison to the two stage technique using a spacer using hand mixing technique
Authors and Affiliations
Syed Yasir Qadiri, Shabeena Mustafa
Keywords
Related Articles
- EP ID EP559094
- DOI -
- Views 130
- Downloads 0
Effect of low level laser therapy (LLLT) on post extraction wound healing
Background: The impaction is define as any tooth that is prevented to reaching its normal position by tissue, bone and another tooth or unerupted tooth, partially erupted tooth in the position of the against another toot...
Quantitative Estimation and Evaluation of Existing Knowledge, Attitude and Awareness among Patients about Execution of Dental Implants: A Questionnaire Based Original Study
Background: Dental implants are viewed as outstanding amongst other treatment alternatives for totally or in partially edentulous patients. However, because of absence of learning and training numerous patients particula...
A Comparative Evaluation of Placental Extracts and Hyaluronidase in Cases of OSMF- A Clinical Study
Background: OSMF is a potentially malignant disease of the oral cavity. The present study was conducted to compare the effect of Placental extracts and Hyaluronidase in cases of OSMF. Materials & Methods: The present stu...
Comparison of efficacy of treatment with cyclosporine 0.1% add on therapy with artificial tears (carboxy methyl cellulose 0.5%) & artificial tears alone on dry eye parameters in post cataract surgery patients
Introduction -Cataract is the leading cause of preventable blindness and the only effective treatment is to surgically remove the affected lens and replace it with an artificial lens. Most patients complain of dry eye af...
INTER RELATIONSHIP BETWEEN THE IMPLANT AND BIOFILM BASED ON THEIR MICROBIAL LINKAGE
Mouth provides a congenial environment for the growth of the microorganisms as compared to any other part of the human body by exhibiting an ideal nonshedding surface. Dental plaque happens to be a diverse community of t...