Prosthodontics

  1. Chewing over advice
A double-blind, randomised-controlled, parallel clinical trial was performed on healthy edentulous elderly patients who required fabrication of a new pair of complete dentures. The participants were divided into two groups: the intervention group received simple dietary advice using a uniform pamphlet, whereas the control group received denture care advice. During treatment, two, 20-min one-on-one advice sessions were conducted by a dentist. The primary outcome was protein intake rose, which was calculated from the responses to a diet history questionnaire. Secondary outcome was masticatory function, which was measured with a colour-changeable chewing gum and a test gummy jelly. Outcome assessment was conducted at baseline and 3-months post-treatment. Protein intake in the intervention group significantly increased compared with that in the control group. Masticatory function was not significantly different between groups, but significantly increased at 3-months post-treatment compared with the baseline in both groups. Simple dietary advice using a uniform pamphlet and new complete denture fabrication increased nutrient intake and masticatory function of healthy edentulous elderly patients.

Suzuki H et al. The effect of new complete denture fabrication and simplified dietary advice on nutrient intake and masticatory function of edentulous elderly: A randomized-controlled trial. Clinical Nutrition 2017 Aug 05.

Q The addition of dietary advice to patients receiving new complete dentures:
A Made no difference to their nutrition
B Improved their protein intake
C Did not improve masticatory function
D None of the above

  1. Framing the question
Does the application of computer-aided design and rapid prototyping (CAD/RP) benefit removable partial denture (RPD) frameworks and what is the fitness of the technique for clinical application? These questions were tested by using 3D images of dentitions from a lab scanner and RPD frameworks designed using commercial dental software and manufactured using selective laser melting. Cases of RPD prostheses were selected (n=15), wherein each patient received two types of RPD frameworks, one prepared by CAD/RP and one by investment casting. Primary evaluation of the CAD/RP framework was performed by visual inspection. The gap between the occlusal rest and the relevant rest seat was then replaced using silicone, and the specimens were observed and measured. CAD/RP frameworks may meet the clinical requirements with satisfactory retention and stability and no undesired rotation. Although the average gap between the occlusal rest and the corresponding rest seat of the CAD/RP frameworks was slightly larger than that of the investment casting frameworks it was acceptable for clinical application.
 
Ye H et al. Preliminary clinical application of removable partial denture frameworks fabricated using computer-aided design and rapid prototyping techniques. Int J Prosthodontics 2017 30: 348-353.

Q Computer-aided design and rapid prototyping for removable partial denture frameworks:
A Is considerably better than investment casting
B Causes unacceptable rotational problems
C Is acceptable for clinical application
D Is inferior to traditional investment casting