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Does wearing dentures change sensory nerve responses under the denture base? Background: The standard textbook on complete dentures suggests the necessity of relief for the incisive and posterior palatine foramina of denture wearers to prevent the impingement of the nerves and vessels passing through these foramina. However, concrete evidence of the effect of dentures on the sensory function of the nerves underlying dentures is lacking. Objective: The study aim was to investigate the influence of denture-induced compression on sensory nerve responses to stimulations. Materials and methods: Only partially edentulous patients of maxillary Kennedy class II who wear dentures (WD) or who never wear dentures (ND) were recruited as participants. The WD and ND groups had 15 participants with a mean age of 66.9 years and 22 participants with a mean age of 60.2 years, respectively. Current perception thresholds (CPTs) at 2000, 250 and 5 Hz, corresponding to A-beta, A-delta and C fibres, respectively, were measured by the Neurometer ® NS3000 device and compared between groups. The data were analysed by the t-test, the paired t-test and analysis of covariance adjusted for age, sex and thickness of the mucosa. Results: The CPTs showed large differences at 2000 Hz but no differences at the other frequencies when the WD and ND groups were compared. Only the CPT of the edentulous side at 2000 Hz was significantly different between groups. Conclusion: Wearing removable partial dentures contributes to changes of responses to stimulations in the large fibre of the sensory nerve underlying the maxillary alveolar ridge.

doi: 10.1111/j.1741-2358.2012.00658.x Survival analysis of mandibular complete dentures with acrylic-based resilient liners Objective: The purpose of this long-term randomised controlled trial was to compare the longevity of dentures constructed using a conventional acrylic resin (CAR) to that of dentures constructed using an acrylic-based resilient liner (ARL). Materials and methods: The follow-up study was essentially carried out by annual telephone calls to each of the 67 participants. The Kaplan–Meier method and life-table analysis were used for univariate analyses. The Cox proportional-hazards test was used as a final model for statistically adjusting predictor variables such as sex, clinician type, mandibular denture type and age at denture delivery. Results: The denture type was likely to affect the survival time of the dentures, while the sex and clinician type were not. The group using acrylic-based resilient denture liners had twice the risk of having shorter denture-survival times than those using conventional acrylic resin dentures. Younger participants were likely to have a reduced risk of having shorter denture-survival times than older participants. Conclusion: We conclude that mandibular complete dentures constructed using ARL are twice as likely as dentures constructed using CAR to have shorter denture survival times, mainly because of material deterioration.

doi:10.1111/j.1741-2358.2009.00308.x Effects of home and office care denture reliners on maxillary complete dentures Objectives: The aim of this study was to evaluate the effects of office (OR) and home (HR) care temporary denture reliners on satisfaction and functional outcomes in maxillary complete denture wearers. Methods: Thirty-four maxillary edentulous patients received application of either OR or HR to their maxillary complete dentures. Patient’s ratings on satisfaction and functional aspects were measured on a 100-mm visual analogue scale at 4 days post-application. Associations between baseline ratings and improvement were also assessed. Results: There were no significant differences between the two groups in satisfaction ratings or in the functional outcomes. The OR group showed a significant improvement in mastication and retention, whereas the HR group exhibited a significant improvement in general satisfaction and mastication. Improvement was negatively associated with baseline ratings of speech, ease of cleaning, stability and retention in the OR groups and across all variables, except ease of cleaning, in the HR group. Conclusion: When used correctly, home care denture therapy can be as effective as office applied temporary liner in improving satisfaction with problematic maxillary dentures.

The purpose of this long-term randomised controlled trial was to compare the longevity of dentures constructed using a conventional acrylic resin (CAR) to that of dentures constructed using an acrylic-based resilient liner (ARL).The follow-up study was essentially carried out by annual telephone calls to each of the 67 participants. The Kaplan-Meier method and life-table analysis were used for univariate analyses. The Cox proportional-hazards test was used as a final model for statistically adjusting predictor variables such as sex, clinician type, mandibular denture type and age at denture delivery.The denture type was likely to affect the survival time of the dentures, while the sex and clinician type were not. The group using acrylic-based resilient denture liners had twice the risk of having shorter denture-survival times than those using conventional acrylic resin dentures. Younger participants were likely to have a reduced risk of having shorter denture-survival times than older participants.We conclude that mandibular complete dentures constructed using ARL are twice as likely as dentures constructed using CAR to have shorter denture survival times, mainly because of material deterioration.

The aim of this study was to evaluate the effects of office (OR) and home (HR) care temporary denture reliners on satisfaction and functional outcomes in maxillary complete denture wearers.Thirty-four maxillary edentulous patients received application of either OR or HR to their maxillary complete dentures. Patient's ratings on satisfaction and functional aspects were measured on a 100-mm visual analogue scale at 4 days post-application. Associations between baseline ratings and improvement were also assessed.There were no significant differences between the two groups in satisfaction ratings or in the functional outcomes. The OR group showed a significant improvement in mastication and retention, whereas the HR group exhibited a significant improvement in general satisfaction and mastication. Improvement was negatively associated with baseline ratings of speech, ease of cleaning, stability and retention in the OR groups and across all variables, except ease of cleaning, in the HR group.When used correctly, home care denture therapy can be as effective as office applied temporary liner in improving satisfaction with problematic maxillary dentures.