Bases En Incrustaciones

Original Article

Post cementation sensitivity evaluation of glass
Ionomer, zinc phosphate and resin modified glass
Ionomer luting cements under class II inlays:
An in vivo comparative study
V Chandrasekhar
Mamata Dental College, Khammam-507 002, AP, India

Abstract
Objective: This study aims to compare the patient-perceived post-cementation sensitivity of class II metal restorationspreoperatively, immediately after cementation, one week after cementation and one month after cementation with (1) Glass
Ionomer luting cement (2) Zinc Phosphate cement and (3) Resin-modified Glass Ionomer luting cement.
Materials and Methods: A total of 60 patients, irrespective of sex, in the age group of 15-50 years were selected and the
teeth were randomly divided into three groups of 20each. Twenty inlay cast restorations were cemented with three different
luting cements. The criteria adapted to measure tooth sensitivity in the present study were objective examination for sensitivity.
(1) Cold water test (2) Compressed air test and (3) Biting pressure test.
Results: The patients with restorations cemented with Resin-modified Glass ionomer demonstrated the least postoperativesensitivity when compared with Glass Ionomer and zinc phosphate cement at all different intervals of time evaluated by
different tests.
Conclusion: The patients with restorations cemented with resin-modified Glass ionomer demonstrated the least postoperative
sensitivity.
Key words: Cementation; glass ionomer cement; inlay, sensitivity; zinc phosphate cement.

INTRODUCTION
The main biologicalproblem one encounters in
restorative dentistry is the favorable environment
provided for microbial growth under the restorations.
Bacterial activity may result in increased pulp
sensitivity, pulpal inflammation, and secondary caries.
Postoperative sensitivity problem may develop when
one fails to properly diagnose the condition of the pulp
before and during cavity preparation. One shouldbe
concerned about the old, leaky fillings and secondary
caries. Bacteria may already be present deep in the
dentine, perhaps even in a local necrotic area of the
pulp. There may be no symptoms because fairly good
Address for correspondence:

Dr. V Chandrasekhar, Mamata Dental College,
Khammam-507 002, AP, India.
E-mail: vcs_1818@yahoo.co.in
Date of submission: 06.05.2009
Reviewcompleted: 22.07.2009
Date of acceptance: 01.12.2009
DOI: 10.4103/0972-0707.62638

drainage of inflammatory exudate may have been
established through the thousands of tubules that
open into fluid gaps and caries lesions.
During the period that a temporary restoration has
been done, there would be good drainage, so there
would be no discomfort. However, when the inlay
is permanently cemented, thetooth may become
symptomatic probably because outward drainage has
been blocked, resulting in an accumulation of noxious
substances in the pulp.
The main objective of cementation is to bring the
preparation surface of the casting, especially its
circumferential constituents, as intimately close as
possible to the tooth substance.
The use of different luting materials to cement inlays
andcrowns has increased. Hence this study was
undertaken to evaluate the postoperative sensitivity
of three different luting cements, namely Glass
Ionomer, Resin-Modified Glass Ionomer and Zinc
Phosphate at various intervals of time.
J Conserv Dent | Jan-Mar 2010 | Vol 13 | Issue 1

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Chandrasekhar: Post cementation sensitivity with different luting cements under class II inlaysMATERIALS AND METHODS
An in vivo evaluation of postoperative sensitivity using
three different luting materials namely Glass Ionomer
luting cement (SHOFU, Tokyo, Japan), Zinc Phosphate
cement (Harvard, Germany) and Resin-Modified Glass
Ionomer cement (Vitremer; 3M ESPE, Germany)
under class II metallic restorations preoperatively,
immediately after cementation, one week after
cementation and...