WS01.05 Development of a musculoskeletal screening tool for children and young people with cystic fibrosis (Addenbrooke’s MST): initial findings

© 2023 European Cystic Fibrosis Society. Published by Elsevier B.V. This is an open access article distributed under the Creative Commons Attribution License, to view a copy of the license, see: https://creativecommons.org/licenses/by/4.0/Objectives: Development of the Addenbrooke’s Musculoskeletal Screening Tool (MST) for children and young people (CYP) with CF. It is recommended by the Association of Chartered Physiotherapists in CF that Musculoskeletal (MSK) screening is carried out in all children from 7 years of age. Currently there is no specific tool for CYP with CF, only the Adult Manchester MST is available in CF (Ashbrook, Taylor and Jones, 2011). Methods: A paediatric MST was constructed by reviewing the Manchester MSK Screening Tool, the pGALS and recent literature surrounding both paediatric and CF related MSK conditions. The tool was developed with support from paediatric CF specialist physiotherapists, paediatric MSK specialist physiotherapists and respiratory consultants. This tool was then used over a one year period on a total of 58 CYP. Results: The MST was well accepted by clinicians and CYP, taking up to 5 minutes to complete. There were 81.8% more positive MSK screens in the year using this Addenbrooke’s MST (20) compared to the previous year using the Manchester MST (11). There were also 6 more referrals, all deemed appropriate by MSK specialist physiotherapists. MSK advice was given to 83% more children in the year using AMST (11) compared to the year using MMST (6). Urinary incontinence appears to be under reported in this population when comparing to other studies with only two positive screens. Kyphosis (as diagnosed by plumb line) was particularly prevalent in this population (20%) and those with kyphosis had a significantly reduced FEV1% (p = 0.008) and FVC% (p = 0.034), as well as tighter pectoralis major (p = 0.002). Conclusion: A screening tool designed for CYP with CF is important in identifying specific conditions to this population. There is an increased number of appropriate referrals when using this tool and interesting initial evidence on the use of pectoralis major length as an outcome measure, however further research and validation is required.Peer reviewe

A Survey of Removable Partial Denture Casts and Major Connector Designs Found in Commercial Laboratories, Athens, Greece

Purpose: This survey was conducted to study the prevalence of partial edentulism, the type of removable partial denture (RPD) support, the type of major connectors, and the frequency of their use in relation to the partial edentulism classes encountered, concerning patients in Athens, Greece. Materials and Methods: The material comprised 628 final casts for RPDs. Each cast was photographed in a way that would allow the number of existing teeth, the classification of partial edentulism, the RPD support, and the particular parts of the metal framework to be identified. Data collected were analyzed statistically using prevalence tables and the χ2 test. Results: Two hundred seventy six (43.9%) casts were for the maxilla and 352 (56.1%) for the mandible. The most frequently encountered group was Kennedy class I for both arches, while class IV was the classification least encountered (p < 0.001). Of all RPDs constructed, 96.8% had a metal framework (tooth-borne and tooth/tissue-borne), while 3.2% of the RPDs were frameless (tissue-borne, acrylic dentures). The U-shaped palatal connector (horseshoe) in the maxilla and the lingual bar in the mandible were the most frequently used for all partial edentulism classes, at 55.2% and 95%, respectively. Conclusions: Analysis of the casts revealed that the type of major connectors selected does not comply with the indications for their applications, considering the lack of dental history and clinical examination. This notes the need for further training dentists and dental technicians in aspects of RPD framework design. © 2013 by the American College of Prosthodontists

Removal of denture adhesives from PMMA and polyamide denture base materials

Denture adhesives need complete removal due to their frequent replacement. Objective: Our study investigates the removal of denture adhesives from denture base materials, using different methods. Methodology: PMMA and Polyamide denture base materials were used to fabricate 120 samples (15×15×1.5mm). One side of the samples was left as processed and the other polished with a usual procedure, hydrated for 24 h, dried, and weighted. They received 0.2 g of three adhesive creams on their unpolished surface (Corega, Olivafix, Fittydent), pressed on polysulfide material, stored under 37°C and 95% rel. humidity for 1 h and 60 of them, following their separation from polysulfide base, brushed under running water, whereas the rest inserted in a cleanser bath (Fittydent Super) for 5 min. The samples were dried and inserted in the oven (37°C) for additional 10 min and weighted again. Roughness tests of denture materials and light microscopy of adhesives creams were also used to evaluate the materials. Time lapse images of spayed with water adhesives on PMMA base were also taken to evaluate the volumetric changes of adhesives. Weight data before and after adhesive removal, indicating the amount of remaining adhesive, were statistically analyzed using Welch’s ANOVA and Games-Howell multiple comparisons tests at α=0.05 level of significance. Results: Roughness of Polyamide was higher than PMMA and Fittydent showed greater volumetric changes than the others. Significant differences (p<0.05), were found between PMMA and Polyamide bases, between Olivafix and Fittydent adhesives, and between brushing and cleansing methods but only for PMMA-Olivafix combination. Conclusions: Adhesives showed a stronger adherence to PMMA surface, and Fittydent was the most difficult to be removed. Removal methods were not effective for all adhesives or denture base materials. These indicate that removal methods, adhesive type and denture base material are all playing a significant role in the removal of adhesives from denture surfaces. © 2021, Faculdade De Odontologia De Bauru. All rights reserved

A survey of Removable Partial Denture (RPD) retentive elements in relation to type of edentulism and abutment teeth in commercial laboratories in Athens [Pregled retencijskih elemenata mobilnih djelomičnih proteza ovisno o vrsti bezubosti i zubima nosačima u komercijalnim laboratorijima u Ateni]

Objective: The aim of this survey was to record removable partial denture (RPD) retentive elements and abutment teeth in partially edentulous patients, identified in commercial laboratories in Athens, Greece. Material and Methods: 628 master casts with the corresponding cast metal frameworks used in the construction of RPDs were evaluated. Casts were photographed to identify the number and position of existing teeth, the partial edentulism class and the retentive elements. Prevalence tables and the x2 test were used for the statistical analysis of the collected data (α=.05). Results: There were 276 maxillary (43.9%) and 352 (56.1%) mandibular casts. Maxillary edentulism entailed almost a total absence of right third molars in 96.7% and left third molars 96.0% of casts, with lower rates for the first and second molars. Edentulism in the posterior mandible presented a similar pattern. The most profound findings concerning retentive elements were: 91.9% of the retainers used were clasps and the remaining 8.1% were attachments. Of the clasps used, 48.9% were of the Roach Τ type, a finding more common in Kennedy Class I as compared to other Kennedy Classes (p<0.01). The circumferential clasps accounted for 19.3% of the total clasps used, and it was less frequently presented (8.8%) in Kennedy I Classes (p<0.01). Conclusions. Roach clasps were used in the majority of cases whereas RPI clasps and attachments were rarely used

The effect of repeated microwaving disinfection on the dimensional stability of acrylic dentures [Učinak ponovljenih mikrovalnih dezinfekcija na dimenzijsku stabilnost akrilatnih proteza]

Objective: The aim of this study was to evaluate the effect of repeated microwave disinfections on the dimensional stability of acrylic dentures. Materials and Methods. Three groups of dentures made of a heat polymerized acrylic resin were tested. I: dentures kept in water (control group). II: dentures microwaved daily while being immersed into water (wet disinfection). III: dentures microwaved daily without being immersed into water (dry disinfection). Measurements were taken across three reference points, on two occasions: after curing and immersion in water for 24 hours, and one week later. Data obtained were analyzed using one-way analysis of variance (ANOVA) and Scheffe's multiple range test. Results. The results showed that the microwave disinfection provokes dimensional changes of the same pattern (shrinkage). The dentures which underwent wet disinfection exhibited the greatest shrinkage (p<0.05). Conclusions. Disinfection using microwave energy may cause dimensional changes (shrinkage) of complete dentures. The microwave "dry disinfection" method can be safely applied in everyday practice since the dimensional changes which occurred seem to be of no clinical significance

Effects of Disinfectants Used for COVID-19 Protection on the Color and Translucency of Acrylic Denture Teeth

Purpose: This study investigated the color and translucency changes of denture teeth after immersion in disinfectant solutions. Material and Methods: Ten denture teeth (Optostar/Heraeus Kulzer) were immersed in nine different solutions (ethanol 78%, 2-propanol 75%, NaOCl 1%, H2O2 0.5%, glutaraldehyde 2.6%, chlorhexidine 0.12%, povidone-iodine 1%, Listerine Naturals, distilled water) for 3 min to 180 min. L*, a* and b* values were measured before and after their immersion with a contact colorimeter (FRU-WR18/Shenzhen Wave Electronics) over a white and black background, and ΔΕ*ab, ΔΕ00, ΔΤPab and ΔTP00 differences were calculated from baseline measurements. Two-way rmANOVA was used to analyze the data for significant differences among solutions and immersion times at α = 0.05. Results: ΔΕ*ab and ΔΕ00 values were significantly different only across solutions (p < 0.001), with mean differences from 0.24 to 1.81 ΔΕ*ab or 0.12 to 0.93 in ΔΕ00 units. TPab or TP00 translucency parameters showed no significant differences among intervals or solutions (p > 0.050). The mean changes ranged from −0.43 to 0.36 ΔTPab units, and −0.22 to 0.27 in ΔTP00 units. Conclusions: Most of the solutions had no significant effect on the color of teeth compared to the water group. Chlorhexidine 0.12%, glutaraldehyde 2.6% and Listerine produced significant color changes, especially at 180 min. The translucency of teeth was not affected by the solutions, regardless of the type and immersion time. © 2023 by the authors

Intra-and inter-brand color differences of denture teeth under different illuminations

Debonding, staining and wear are usually the reasons for denture teeth replacement by new ones from same or different brands. Objective: This study investigates the possible differences in color of denture teeth of the same or different brands under different illuminations, since their metameric behavior in color under specific illumination may become unacceptable. Methodology: For the purpose of this study, 10 denture teeth (#11), shade A3, of 4 different brands were selected (Creopal/KlemaDental Pro, Executive/ DeguDent, Cosmo HXL/DeguDent, Ivostar/Ivoclar-Vivadent). Teeth stabilized in white silicone mold and the CIELAB color coordinates of their labial surface under 3 different illumination lights (D65, F2, A) were recorded, using a portable colorimeter (FRU/WR-18, Wave Inc). ΔE*ab values of all possible pairs of teeth of the same brand (n=45) or pair combinations of different brands (n=100) under each illumination light, in a dry and wet state were calculated. Data were analyzed statistically using 3-way ANOVA, Friedman’s and Wilcoxon’s tests at a significance level of α=0.05. Results: The results showed that brand type affected significantly L*, a* and b* coordinates (p<0.0001), illumination a* and b* coordinates (p<0.0001), but none of them was affected by the hydration state of teeth (p>0.05). Intra-brand color differences ranged between 0.21-0.78ΔΕ* units with significant differences among brands (p<0.0001), among illumination lights (p<0.0001) and between hydration states (p=0.0001). Inter-brand differences ranged between 2.29-6.29ΔΕ* units with significant differences among pairs of brands (p<0.0001), illumination lights (p<0.0001) and hydration states (p<0.0001). Conclusions: Differences were found between and within brands under D65 illumination which increased under F2 or A illumination affected by brand type and hydration status. Executive was the most stable brand than the others under different illuminations or wet states and for this reason its difference from other brands is the lowest. In clinical practice, there should be no blending of teeth of different brands but if we must, we should select those that are more stable under different illuminations. © 2020, Bauru School of Dentistry, University of Sao Paulo. All rights reserved