Adhesiveness Clinical Trial
Official title:
Bar and Ball Joint Overdentures Surface Roughness and Microbial Adherence
The aim of the study was to compare the surface roughness (Ra) of the implant retained
mandibular bar overdenture (BOD) and the implant retained mandibular ball joint overdenture
(BJOD) in jaw and its relation with the adhesion of molds and yeasts and mesophyll aerobe, in
time 30 to 180 days in mouth. Five systems titanium bar CARES® and synOcta® Straumann® Dental
Implant System, Holding AG Inc., Basel, Switzerland (BOD); and five systems joint ball
Klockner® Implant System; Soadco Inc., Escaldes-Engordany; Andorra (BJOD), were used in two
parallel groups of five participants, in an essay to simple blind person. To 30 to 180 days
they were withdrawn and they were evaluated the Ra (Mitutoyo Surfest SJ-301® Mitutoyo
Corporation Inc., Kanagawa, Japan) and the adhesion of microorganisms (CFU/ml).
The Ra:um (the 30th and 180th): BOD, 0.965 - 1.351; BJOD, 1.325 - 2.384. Adhesion: molds and
yeasts, BOD, 2.6 x 102 and 4.6 x 103; BJOD, 3.0 x 102 and 5.3 x 104. Adhesion: mesophyll
aerobe, BOD, 3.8 x 106 and 5.8 x 106; BJOD, 4.3 x 106 and 7.1 x 107. The BOD and BJOD,
present different Ra (P < 0.05) to 30 to 180 days. To 30 days (P = 0.489) differences do not
exist as regards the adhesion of molds and yeasts and mesophyll aerobe between both
overdentures. To 180 days (P = 0.723) differences exist as regards the adhesion of mold and
yeast and mesophyll aerobe, being major in BJOD.
Adherence mold and yeast and mesophyll aerobe to BOD and BJOD, Surface roughness (Ra), and
Statistical Analyses Microbial populations have been controlled in the saliva at initial time
and adherence at 30 to 180 days after the overdentures in the mouth. The saliva sample was
obtained from the patient in a sterile sputum collection bottle through a sterile solution.
The overdenture samples were extracted and processed for analysis. Each sample was submerged
in ¼ sterile Ringer and subjected to vigorous ultrasound shaking. From each of the microbial
suspensions, successive dilutions were made to determine the total number of viable
microorganisms present. Total count of mold and yeast and total count of mesophyll aerobe
were performed.
The surface roughness of BOD and BJOD was determined with the rugosimeter the Mitutoyo
Surfest SJ-301® (Mitutoyo Corporation Inc., Kanagawa, Japan), through a displacement force of
4mN and of the tray to 0.5 mm/s and back to 1 mm/s (Murtra and Arcís,1999). The roughness
profile Ra was evaluated and determined in microns (ųm) through five readings for each of the
samples in the study respectively.
The results of BOD and BJOD were compared for the determination of Ra and the adherence of
mold and yeast and mesophyll aerobe. For this, we used the statistics Shapiro-Wilk, T and the
Pearson Correlation Coefficient to determinate the relationship between the study variables.
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