Volume 4 Issue 5
Can Sealants Reduce the Risk of Caries in Primary Molars?
In a new study, it was found that with coverage of primary
molars with sealants, these teeth are less prone to caries. The researchers
also found that the sealants delay the need for restorative
work on these teeth. Previous researches have focused on
the benefits of sealants for permanent molar teeth; unfortunately,
few studies have addressed their effects on the primary teeth. The
present study which was conducted by Michael Hong and his colleagues
shows that their findings provide the necessary evidence
to support sealants in young children.
Volume 4 Issue 5
Blood Pressure Variations in the Perioperative and Postoperative Period
after Tooth Extractions: An Evaluative Study
Karol S Romero-Guamán, Kleber A Vallejo-Rosero, Andrea Gonzales-Bustamante, Viviana Chavez-Enriquez,
Ivan Solani Martins, Wilber Edison Bernaola-Paredes and Frankiln R Quel-Carlosama
Introduction: Tooth extraction generates a certain level of stress and anxiety; furthermore, these factors can produce a sudden
variation in blood pressure even in normotensive patients. This study aimed to determine the variation in blood pressure values and
its relationship with the level of anxiety in patients undergoing dental extractions.
Methods: In total 110 adult patients, requiring simple dental extractions were selected and treated at the Surgery outpatient Clinic.
Thus, the modified Corah questionnaire was applied to determine the level of anxiety and blood pressure control was performed by
the auscultatory method, using a Riester © Duplex® 2.0 Stethoscope. The Riester exacta® aneroid sphygmomanometer, complying
with the European standard EN1060, was used in the preoperative period, 5 minutes after the application of the local anesthetic and
in the immediate postoperative period. Data were analyzed at a statistical confidence level of 95%.
Results: 98.2% (n = 108) showed a variation in blood pressure values between the pre- and postoperative time intervals, however, a
significant variation occurred in the systolic pressure; the highest values were recorded in the immediate postoperative period. There
was greater variability of blood pressure in patients with moderate to severe anxiety than in patients with mild anxiety. Patients from
50 - 60 years of age showed a higher variation in blood pressure values during the procedure.
Discussion: There was a significant variation in blood pressure during dental extractions in normotensive patients, and the level of
anxiety shown by patients was related to the blood pressure values measured in this study.
Keywords:Arterial Pressure; Tooth Extraction; Dental Anxiety; Sphygmomanometers; Oral Surgical Procedures
Volume 4 Issue 5
Effect of Deproteinization Technique with Calcium Hypochlorite on the
Bond Strength of Fiber Posts to Root Dentin
Débora Pereira Diniz Correia Barcellos, Ramiro Barcellos, Ana Paula Farina, Matheus Albino Souza and Doglas
Purpose: The aim of this study was to investigate the effects of pre-treatment of root dentin with 5% calcium hypochlorite (Ca(OCl)2)
on the bond strengths of fiber posts relined with resin composite to the root dentin using two total etching adhesive systems. In
addition, interfacial surface and elemental composition of hybrid layer (ECHL) with and without dentin pre-treatment with Ca(OCl)2
was analyzed by SEM and EDS, respectively.
Materials and Methods: Twenty bovine incisor roots were divided into four groups after phosphoric acid etching: G1 (control),
irrigation with physiologic solution and Single Bond (3M ESPE, St Paul, MN, USA); G2 (control), irrigation with physiologic solution
and Adper Scotchbond Multi-Purpose (3M ESPE); G3, irrigation with Ca(OCl)2 for 5 minutes and Single Bond; and G4, irrigation
with Ca(OCl)2 for 5 minutes and Scotchbond Multipurpose. Fiber posts relined with resin composite were cemented with RelyX ARC
(3M ESPE). All roots were sectioned transversely and the push-out test was performed. Failure modes were observed and the bond
strength means were analyzed by ANOVA and Tukey's test (α = 0.05). Interfacial surface and ECHL was qualitatively accomplished
using SEM and EDS, respectively.
Results: Both adhesive systems showed similar bond strength values (P > 0.05) and failure mode. Pre-treatment of the dentin with
Ca(OCl)2 increased the bond strength values to Single Bond (P < 0.05). This pre-treatment had no influence on the bond strength
values for Scotchbond Multipurpose, which was similar to that of the control group (P > 0.05). SEM and EDS revealed similar patterns
of hybrid layer and ECHL in all groups.
Conclusion: Pre-treatment of root dentin with Ca(OCl)2 increased the bond strength of the fiber post relined with resin composite to
root dentin for the Single Bond adhesive system and does not affect the hybrid layer and ECHL.
Keywords:Adhesive System; Bond Strength; Calcium Hypochlorite; Fiber Post; Root Canal