2 research outputs found
Multi‑length Scale Approach to Investigate Cleaning of Food‑Derived Deposits Adhered to Hard Surfaces: Mixtures of Starch, Whey Protein, and Lard
Fouling, the accumulation of undesirable material on manufacturing equipment surfaces, poses a pervasive challenge in
industrial processes. In the food industry, the complex interactions among these compounds can give rise to stubborn deposits
that deviate from conventional cleaning protocols. In this work, the forces and removal mechanisms of model fouling
agents composed of mixtures of starch, whey protein, and lard deposited on solid surfaces of relevant industrial interest (i.e.
stainless steel, aluminium, and PTFE) are investigated using a multi-length scale approach, involving milli-manipulation
and a lab-simulated Clean-In-Place (CIP) system. The forces involved in the removal process, the types of failure observed
when the deposits are subjected to shear stress (adhesive, mixed, or cohesive), and the performance of the CIP system are
systematically analysed as a function of the cleaning treatments applied. For stainless steel surfaces, alkaline treatment
seems to facilitate the cleaning of lard and starch deposits, while the whey foulant removal tends to be more effective using
hot water under the conditions tested. Hot water is effective for stainless steel and PTFE surfaces, reducing the mechanical
shear stress required, while the alkaline treatment demonstrated superior efficacy for aluminium surfaces. These findings
emphasise the importance of customising cleaning protocols for CIP optimisation
Wilson maxillary curve analyzed by cbct a study on normocclusion and malocclusion individuals
The anatomy of dental compensation curve in the frontal plane described by George H. Wilson is one of the
occlusal determinants of orthodontic treatment. However, there is few published comparing malocclusion and
normocclusion individuals.
Objectives: The aim of this study is to compare the curve of Wilson at first and second maxillary molars, normocclusion pattern and malocclusion pattern, with and without bilateral posterior crossbite, using angular references
in CBCT studies.
Material and Methods: We analyzed 10 cases of malocclusion with bilateral posterior crossbite, 10 cases of malocclusion without bilateral posterior crossbite and 10 cases with non orthodontic normocclusion (patients who
underwent cone beam study for other reasons than orthodontic). All of them were adults, more than 19 years.
Angular variables from left and right axis (line connecting the occlusal and furcation groove) of first and second
molars towards a perpendicular to the frontal palate were measured. There was carried out an Anova test, Bonferroni analysis and Levene's statistics.
Results: The descriptive analysis of the results shows an average values of total maxillary curve of Wilson for
first molars (sum of left and right angle) of 8.1° for normocclusion group, 0.4° for the malocclusion pattern with
bilateral posterior crossbite and 16.9° for the malocclusion pattern without this alteration. The mean differences
was statistical significant (P<0,042) between between malocclusion pattern groups with and without crossbite .
Conclusion: The curve of Wilson, measured at maxillary first molars in patients with bilateral posterior crossbite
is more concave than the other groups, suggesting no dentoalveolar compensations