Prosthodontics

27.Clasps tested for quality of life

These authors investigated the efficacy of non-metal clasp dentures (NMCDs) with regard to oral-health related quality of life (OHRQoL) and compared the findings with those for conventional metal clasp-retained dentures (MCDs). A trial included 28 partially dentate individuals randomised to receive MCDs followed by NMCDs, or the opposite sequence (n=14 in each group); each denture was worn for three months. OHRQoL was evaluated at entry (T-entry; before treatment with the first denture) and at 3 months after treatment with each denture (T3). An examiner evaluated denture stability, oral appearance and surface roughness before denture delivery (T0) and at T3, and denture hygiene at T3. A total of 24 patients completed the trial. The mean score was lower for NMCDs than for MCDs, and the difference was clinically relevant. Analyses found a significant effect of the denture type on the quality of life score and scores for the orofacial appearance, orofacial pain and psychological impact domains. The results suggest that NMCDs provide better OHRQoL compared with MCDs.

Fueki K, Yoshida-Kohno E, Wakabayashi N. Oral-health related quality of life in patients with non-metal clasp dentures: a randomized crossover trial. J Oral Rehabilitation 2017 44: 405-413.

Q Non-metal clasp dentures were perceived as having a positive quality of life effect on:
A Orofacial appearance
B Orofacial pain 
C Psychological impact
D All of the above

28.Dentures and vinegar

Diluted sodium hypochlorite, vinegar, and chlorhexidine digluconate can be considered adequate products for cleaning dentures concludes this study. Biofilm samples collected from 10 removable dentures were subjected to 10 disinfection protocols: distilled water for 30 min (negative control); 1% sodium hypochlorite for 10 min (positive control); diluted sodium hypochlorite for 10 min; vinegar for 20 min; 0.2% peracetic acid for 5 min; alkaline peroxide solution for 5 min; alkaline peroxide solution for 30 min; 0.12% chlorhexidine digluconate for 10 min; 0.05% sodium salicylate solution for 10 min; and enzymatic detergent for 2 min. Each of the samples was plated on petri dishes. Diluted sodium hypochlorite, vinegar, and chlorhexidine digluconate inhibited bacterial growth, with an effect similar to that of 1% sodium hypochlorite. The 0.2% peracetic acid and 0.05% sodium salicylate solutions were ineffective against bacterial growth, while enzymatic detergent and alkaline peroxide achieved an intermediate effect. The effect of these agents on acrylic resin denture base materials needs to be examined to provide complete information about their clinical indication.

Pires CW et al. Chemical methods for cleaning conventional dentures: what is the best antimicrobial option? An in vitro study. Oral Health Preventive Dent 2017 15: 73-77.

Q Pending further study on its effects on acrylic, which of the following is an effect anti-bacterial agent with the potential for denture cleaning?
A 0.2% peracetic acid
B 0.05% sodium salicylate solution
C Chlorhexidine digluconate
D Water