A Comparative Analysis of Master Casts Obtained using Different Surface Treatments on Impression Copings for Single Tooth Implant Replacement -An In vitro Study
Introduction: Minor rotation of impression coping secured in the impression is an avoidable error that needs to be minimized to ensure precise positioning of implant analog in master cast. Aim: The aim of the study was to compare the precision in obtaining master casts by improving the stability...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
JCDR Research and Publications Private Limited
2017-08-01
|
| Series: | Journal of Clinical and Diagnostic Research |
| Subjects: | |
| Online Access: | https://jcdr.net/articles/PDF/10501/28372_CE(SY)_F(SS)_PF1_(SY_MJ_PY)_PFA(SY_SS).pdf |
| Summary: | Introduction: Minor rotation of impression coping secured in
the impression is an avoidable error that needs to be minimized
to ensure precise positioning of implant analog in master cast.
Aim: The aim of the study was to compare the precision in
obtaining master casts by improving the stability of impression
copings in the impression with the use of tray adhesive along
various surface treatments to increase surface area and by
mechanical locking.
Materials and Methods: A total of 60 samples were made
(15 samples for each group). A total of 15 samples for Group I
were prepared with untreated impression copings, 15 samples
for Group II with impression copings treated and modified by
application of tray adhesive only. Group III includes 15 samples
which were fabricated with impression copings modified by
making four vertical grooves on surface of impression coping
and coated with adhesive. Group IV had 15 samples which
were fabricated with impression copings sandblasted with 50
µm aluminum oxide powder and coated with adhesive. Profile
projector was used to evaluate the rotational accuracy of the
implant analogs by comparing Molar Implant Angle (MIA) and
Premolar Implant Angle (PIA) of test samples with reference
model. One-way ANOVA and Student t-test were used to
analyze the data.
Results: One-way ANOVA didn’t show any significant
differences for both MIA and PIA between the Groups I, II, III and
IV. Student’s unpaired t-test revealed no significant difference in
the mean MIA and mean PIA.
Conclusion: Though results were statistically non-significant,
all types of surface treatments of the impression copings
showed more accurate transfer than those with no treatment.
Sandblasted and adhesive coated impression copings showed
minimum amount of rotation followed by those with vertical
slots and adhesive coated impression copings. |
|---|---|
| ISSN: | 2249-782X 0973-709X |