Article

The purpose of this article was to compare the accuracy of a new impression
technique, the triple-layer impression technique (TLIT),
with the conventional
impression technique (CIT) to fabricate an auricular prosthesis. Fifteen male
subjects (aged 22-45 yr) were selected. Ten markings were made on the subject's
ear (super aurale [sa], sub aurale [sba], pre aurale [pra], post aurale [poa], A,
A1, B, B1, C, and C1) and five measurements (sa-sba, pra-poa, A-A1, B-B1, and
C-C1) were made. Custom-made trays were used to record impression in CIT and
TLIT. Impressions were made using alginate, and models were cast with type IV
gypsum product. Markings were transferred on the cast. Measurements were
rechecked on the models. Distribution analysis of difference in measurements
between the two impression techniques and the subject's actual values was
evaluated. Sign test was used to analyze the statistical significance.
Statistically significant differences were found in measurements A-A1, B-B1, and
C-C1 between the two techniques when compared with the subject's actual
dimensions (p < 0.01). TLIT was found to produce accurate models when compared
with CIT. The TLIT used in the study was cost effective, less technique
sensitive, and tailor made to reduce chairside orientation time during wax try-in
appointments for rehabilitating patients, especially those with unilateral
auricular defects.

Langue : ANGLAIS