Stability Of Mandibular Complete Dentures Research Articles

Treatment Approaches to Improve Retention and Stability of Mandibular Complete Dentures

Treatment Approaches to Improve Retention and Stability of Mandibular Complete Dentures

Evaluation of dynamic impression lining material effects on masticatory function and the oral health-related quality of life of complete denture wearers: A six-month randomized controlled trial.

To determine the effect of a dynamic impression lining material (DIL) on the retention and stability of mandibular complete dentures (LCD), masticatory performance, and the oral health-related quality of life (OHRQoL) of the patients wearing complete denture (CD) compared with those wearing a denture with conventional hard denture liner (HL). Twenty-five patients who wore CD with an ill-fitting LCD were randomly assigned to two groups: LCD relined with DIL (Dynamic impression lining material) or HL (Tokuyama® Rebase II (fast)). Three objective measures (denture retention, stability, and masticatory performance) were measured. The OHRQoL was also measured using the Thai version of oral impacts on daily performance. Outcomes were measured at six time points: baseline, 3 days, 1 week, 1 month, 3 months, and 6 months after relining. Outcome changes were analyzed using a generalized estimating equation, and all models were adjusted for age, mandibular ridge form, and CD age at a 5% significance level. After LCD relining, the frequency and severity of adverse oral impacts significantly decreased. In the DIL group, denture pain occurred on and off over six months, and an ill-fitting denture impacted at one month. In the HL group, denture pain continuously decreased over time. At 3 months, changes in the clinical properties of DIL were observed, including perceived odor. The material also peel-off from the denture base, and plaque accumulation was observed. In contrast, the HL properties remained stable for over 6 months. Although DIL improves denture retention and stability, masticatory performance, and the OHRQoL of the patients who wear CD, oral adverse effects were not eliminated. The clinical properties of DILs changed at 3 months, while the HL remained relatively stable for up to 6 months.(The clinical trial registration number: Thai Clinical Trials Registry (TCTR) number TCTR20210625005.).

Neutral zone technique: An aid of the prosthodontist- A case series

The area where the outward forces from the tongue and the inward forces from the lips and cheeks are nullified during the functional movements is referred to as the neutral zone. Therefore, the incorporation of neutral cone technique serves as an alternative approach in the fabrication of lower complete dentures specifically in ridges which are highly atrophic. The technique aims to construct a denture that is shaped by muscle function and is in harmony with the surrounding oral structures. It is rarely used because of the extra clinical step involved and some clinicians may find the detection of neutral zone difficult. This article describes a technique for improving the stability of mandibular complete denture for patients who have a resorbed mandibular residual ridge.This neutral zone impression technique is a useful technique when providing mandibular complete denture. It’s use can overcome some of the denture stability difficulties caused in some patients with a more powerful oral musculature, or in patients who have poor or altered neuromuscular control.

Using a Modified Neutral Zone Technique to Improve the Stability of Mandibular Complete Dentures: A Prospective Clinical Study.

The aim of this study was to evaluate the improvement in mandibular complete dentures (MCD) stability using a modified neutral zone technique (MNZT). For 21 patients who were dissatisfied with their primary MCD, MCDs were fabricated using the MNZT. Nearly all of the patients showed considerable improvement in oral health-related quality of life, and 85.7% of the patients stated an improvement in general denture stability and while chewing. A masticatory function test showed no significant changes. This MNZT seems to improve MCD function, especially in patients who cannot be treated with implants.

Neutral Zone- A Clinical Report

Edentulism from a long term results in high resorption of lower edentulous ridge which often pose a problem in stability of mandibular complete dentures. It is a challenge for a prosthodontist to rehabilitate those patients to near normal function, irrespective of the clinical picture. This paper presents neutral zone technique in a functional approach to overcome the problem of instability of lower dentures caused in patients by a more potential musculature.

Effect of the lingual ledge of neutral zone impression on the retention and stability of mandibular complete denture in elders with atrophied alveolar ridge

objectiveThis study examined the effect of lingual ledge on complete denture retention and stability for atrophied mandibular ridge. MethodsTen elders complaining from the retention of mandibular denture were included in this study. Two sets of complete dentures were fabricated for each elder, one with lingual ledge and the other without lingual ledge. For standardization, these complete dentures were fabricated according to neutral zone technique but the difference between the 2 sets of dentures was denture base contours and the presence or absence of lingual ledge. Dentures retention and stability was recorded using force gauge at insertion and after 6 weeks. Data were analyzed to determine statistical equivalent of the retention and stability between these 2 different complete dentures using the SPSS.ver.17 and paired t-test (α = 0.05). ResultForce gauge prosthesis retention and stability measurements showed that the 2 different complete dentures were not statistically equivalent, with the complete denture include lingual ledge demonstrating the greater retention and stability. ConclusionWithin this study, lingual ledge developed during physiologic recording the denture space enhances the mandibular denture retention and stability. Also, with the time there is improvement in the denture retention and stability.

A structural equation model relating oral condition, denture quality, chewing ability, satisfaction, and oral health-related quality of life in complete denture wearers

ObjectivesTo investigate the relationship between mandibular ridge form, stability and retention of mandibular complete denture, accuracy of jaw relation recording, patients’ perception of chewing ability, satisfaction with dentures and oral health-related quality of life (OHRQoL) in complete denture wearers. MethodsA total of 183 edentulous patients, who visited the Dental Hospital of Tokyo Medical and Dental University for new complete dentures, were recruited. Oral examination was performed. Cawood and Howell's method was used to grade the mandibular ridge form. The stability and retention of the mandibular complete denture were assessed using Kapur method. Accuracy of jaw relation recording was evaluated using a newly developed jaw relation index. Patients’ perception of chewing ability was rated using a food intake questionnaire. Patients’ satisfaction with complete dentures was assessed on a 100-mm visual analogue scale. OHRQoL was measured using the Japanese version of the Oral Health Impact Profile for edentulous subjects. A structural equation model was constructed based on the hypothesis that oral condition and denture quality would be related to chewing ability, satisfaction and OHRQoL. ResultsSignificant relationships were found between mandibular ridge form, stability of mandibular complete denture, accuracy of jaw relation recording, perceived chewing ability, satisfaction and OHRQoL. Various fit indices were within acceptable limits. ConclusionsOral condition and denture quality were related to patients’ perception of chewing ability, satisfaction with dentures and OHRQoL in complete denture wearers. Clinical significanceA favourable oral condition and denture quality are important for successful complete denture therapy.

Overcoming the Unstable Mandibular Complete Denture: The Neutral Zone Impression Technique

This article describes a technique for improving the stability of mandibular complete dentures for patients who have a diminished mandibular neutral zone. The technique involves making an impression which is shaped by the patient's oral musculature, and which defines the shape and contour of the patient's neutral zone. A case report is presented in which the use of this technique is described. It is hoped that this article will increase the awareness of dental practitioners to the use of this technique. The neutral zone impression technique is a useful technique when providing mandibular complete dentures. Its use can overcome some of the denture stability difficulties caused in some patients by a more powerful oral musculature, or in patients who have poor or altered neuromuscular control.

Maximizing mandibular prosthesis stability utilizing linear occlusion, occlusal plane selection, and centric recording.

The stability of mandibular complete dentures may be improved by reducing the transverse forces on the denture base through linear (noninterceptive) occlusion, selecting an occlusal plane that reduces horizontal vectors of force at occlusal contact, and utilizing a central bearing intraoral gothic arch tracing to record jaw relations. This article is intended to acquaint the reader with one technique for providing stable complete denture prostheses using the aforementioned materials, devices, and procedures.

Effect of weight change of mandibular complete dentures on chewing and stability: A pilot study

Statement Of Problem. Little is known as to whether denture weight contributes to the retention and stability of mandibular complete denture. Purpose. This study compared the jaw movements and denture retention, stability, and comfort of heavy and light weight mandibular complete dentures. Material And Methods. Mandibular complete dentures of 12 subjects were duplicated using an autopolymerized polymethyl methacrylate (PMMA) resin. The heavy weight denture was set with weights (20 or 60 g) and the lightweight denture was packed with wax instead of weights. Masticatory movements (3 times each) and denture stability (5 times each) were measured. The subjects expressed their denture preference for comfort and chewing. Results were analyzed using ANOVA and Wilcoxon tests at significance level of α=.10. Results. Masticatory movements and denture retention were not significantly ( P >.10) affected by increasing the weight. Five subjects preferred the heavy denture and 4 subjects preferred light denture for comfort; 3 subjects had no preference. Conclusion. The weight of a well-fitting mandibular complete denture did not affect jaw movements, denture stability, or patient preference. (J Prosthet Dent 1999;82:636-42.)