European Journal of Prosthodontics and Restorative Dentistry

Evaluation of Gingival Displacement with Aluminum Chloride and Naphazoline Hydrochloride: A Randomized Controlled Trial

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Cover Date

March 2021

Print ISSN

0965-7452

Electronic ISSN

2396-8893

Vol

29

Issue

1

Abstract

The objective of this study was to evaluate the use of naphazoline hydrochloride in
comparison with aluminum chloride for vertical gingival displacement. The inclusion
criteria were: patients with a good general systemic condition; periodontal health; and
thick gingival biotype. Moreover, the exclusion criteria were: smoking individuals; canine
teeth or central incisors with carious lesions, abrasion, erosion, prosthetic abutments or
unsatisfactory restorations; patients with periodontal disease; and users of continuous
medication. 72 teeth were included and the Square Block Design was used to randomize
the samples. Three measures were obtained from each tooth, and mean vertical gingival
displacement was calculated. A descriptive analysis of the average displacement was
performed. The normality test used was the Lilliefors’ Test and for comparison between
treatments, the Kruskal-Wallis Test was used. The Bartlett’s Test for homogeneity
of variances was used and a 5% (p < 0.05) significant level was considered. Thus, the
Aluminum Chloride and Naphazoline Hydrochloride showed no statistically amount of
gingival retraction than the control group (p = 0.3822). The average of gingival vertical
displacement in all groups were less than 0,5 mm. The technique used did not allow any
amount of horizontal displacement on obtained models.
Keywords
Aluminum Chloride
Dental Impression Materials
Naphazoline
Astringents
Gingival Retraction