Retention Of Complete Dentures Research Articles

Impacts of Denture Retention and Stability on Oral Health-Related Quality of Life, General Health, and Happiness in Elderly Thais.

Purpose This study investigated denture and patient related factors associated with oral health-related quality of life (OHRQoL) of complete denture wearers and their association with general health and happiness. Methods This retrospective cohort study comprised 130 participants with complete edentulism, with maxillary and mandibular complete dentures treated at Chulalongkorn University Dental School during 2010-2017. The primary outcome was the presence of overall and domain-specific Oral Impacts on Daily Performances (OIDP). Secondary outcomes were diagnosed and perceived general health, and happiness. Denture retention and stability were classified as acceptable or unacceptable following the CU-modified Kapur criteria. Five esthetic-assessment criteria of the harmonization and proportions between facial and dental anatomical landmarks were measured from patient's photographs. Age, sex, previous complete denture experience, and denture age were recorded. The associations between each variable and oral impacts were analyzed using bivariate logistic regression, and the factors with p < 0.25 were further adjusted using multivariable analysis. Associations between oral impact scores and general health and happiness were assessed using Spearman's rank correlation. Results The most frequent oral impacts were on physical domain, while social domain was the least affected. Denture retention/stability was significantly associated with both overall and specific domains of oral impact. Happiness was found to be strongly correlated with perceived general health, but marginally with oral impact scores. Conclusions Unacceptable complete denture retention and stability are substantial risk factors for impaired OHRQoL in complete edentulism. Maintaining optimal denture retention and stability in denture wearers is essential for good oral health and well-being with the goal of enhancing happiness.

Evaluation the retention of upper complete denture with different acrylic denture base materials

Objective: to evaluate the retention of thermoplastic upper complete denture versus heat cured upper complete dentureAbstract: Successful denture is affected by altered biomechanical phenomenon of support, stability and retention. Polymethyl-methacrylate (PMMA) has been used to construct the dentures for ages. Some problems were described with these prosthesis that lead to fracture and allergy to methyl methacrylate monomer. The introduction of the nylon-derived denture base materials in 1950s smooth the way for a new type of dentures. It was found that soft dentures are excellent alternate to traditional hard-fitted dentures. Several advantages to flexible dentures over the traditional rigid denture bases were noted like translucency of the material that picks up the underlying tissue tones.Material and methods: Fourteen completely edentulous patients were randomly divided into two groups. Group I received thermoplastic upper complete denture. Group II received heat cured upper complete denture. a readymade metallic bar was attached to the contact area between upper second premolar and upper first molar bilateral using self-cure acrylic resin, its center coincide with the geometrical center of the denture. Retention was measured using digital force gauge Retention force was measured as the maximum force needed to completely dislodge the maxillary denture. This step was repeated three times, three readings were taken and the average was recorded for each patient in both groups. The measurements were taken after 1 week of denture insertion and repeated 1, 3, 6 months after denture delivery.Results: group I showed a little increase in denture retention than group II at the time of denture insertion, 1 and 3 months after but after 6 months it showed marked decrease in the denture retention. On the other hand the group II showed increase in the denture retention at time of denture insertion, 1 and 3 months after with slight decrease after 6 months.Conclusion: The use of thermoplastic and heat cured acrylic resin has no significant difference regarding the denture retention. The time intervals for denture retention showed increase in denture retention regarding the time factors .

Mandibular single-implant overdenture as an alternative for full arch rehabilitations

Oral rehabilitation with mandibular single-implant overdentures (SIO) has been characterized as a solution to improve retention and stability of conventional complete dentures (CD). Among the benefits of this therapy, it can be mentioned minimally invasive surgery, simple prosthetic technique, better retention, and significantly reduced costs. However, the application of this protocol in daily clinic is still not widespread. Aim: Thus, this study aimed to perform a literature review to address the clinical characteristics of this rehabilitation, when compared to two-implant mandibular overdentures and CD. Methods: For this, a search was conducted in the PubMed database, considering articles published in English language, without date limitation. Results: It was found 243 manuscripts, of which 20 were compatible with the aim of this study after title/abstract reading. The selected papers focused on masticatory muscles function, satisfaction levels and self-reported quality of life, as well as surgical and prosthetic outcomes, such as maintenance, repair and implant failure rates. All evaluated manuscripts showed similar masticatory function and patient's satisfaction with SIO and two-implant overdenture, while results for a SIO were greater when compared to rehabilitations with CD. In addition, SIO have proven to do not damage the implant, being implant loss close to zero. However, the prosthesis fracture adjacent to the implant was a recurrent clinical outcome, which requires further studies to solve this impairment. Conclusion: Thus, it can be concluded that SIO represents an alternative treatment for frail elders or low-income patients, leading to higher masticatory function, as well as improved quality of life.

Comparing the effect of three denture adhesives on the retention of mandibular complete dentures for diabetic patients (randomized clinical trial)

ᅟᅟᅟRetention is an important parameter in the success of the prosthodontic treatment. Retention depends upon numerous factors such as physical, physiological, psychological, mechanical, and surgical factors. Denture adhesives increase the retention and stability of complete dentures. Denture adhesives have many indications such as immediate dentures, flat ridges, and patients with xerostomia and poor muscle control.Aim of studyThe present in vivo clinical study evaluates whether the adhesives used are truly effective to improve the mandibular complete denture retention for low well-rounded mandibular ridges in controlled diabetic patients.Materials and methodsAn in vivo clinical study is made of 30 male completely edentulous patients with low well-rounded mandibular ridges with an age group of 50–70 years were selected. All patients were controlled diabetic type 2. New complete dentures were constructed for them. The universal testing machine was used to measure forces required to dislodge the dentures. Retention of mandibular complete dentures was measured without adhesive and with the use of three types of denture adhesives after adaptation period of 1 month. A paste type (Fittydent) and two cream types (Protefix and Corega) were used. The average records after 15 min, 1 h, and 2 h were recorded.Results and conclusionThis study revealed that denture adhesives increase retention of complete dentures. Fittydent adhesive paste was more effective in improving the retention than Protefix and Corega adhesive creams. Therefore, denture adhesives improve patient satisfaction.

The Effect of Flexible Acrylic Resin Lingual Flanges on The Retention of Mandibular Complete Dentures

. Purpose: To evaluate the effect of flexible lingual flanges on the retention of conventional mandibular complete denture. Material and methods: Ten completely edentulous patients were selected for this study with ages ranged from 50-60 years. All patients had received heat cured acrylic resin denture without modification (Group І) then heat cure lingual flanges were removed and replaced by flexible lingual flanges (Group ІІ). All patients were instructed to use their resin dentures for equal periods of three months when retention of denture base were measured after one month and at the end of three months, period of two week interval was left between each group as a washing period. Results: The results of this study showed that there was a significant difference between them, as the flexible lingual flanges (group ІІ) was better than the heat cured acrylic resin denture base (group І). Conclusion: Within the limitation of this study, it was concluded that retention of the mandibular denture modified with flexible acrylic resin “versacryl” was higher than that of the conventional heat cured acrylic resin denture. Retention was increased by time in each study group. The use of flexible acrylic resin in mandibular complete dentures (as lingual flange) could be considered as an alternative effective treatment

Evaluation of Two Different Attachment Systems Used with Mandibular Implant-Retained Overdenture

Objectives: The aim of this study was to evaluate the effect of two different attachment systems on the retention and implant stability of implant retained mandibular Overdenture. Material and Methods: Fourteen completely edentulous patients with age ranged from 47-65 years planned to receive conventional complete denture. Following the treatment protocol, each patient received two implants in the mandibular anterior region and after insurance of the osseointegration, the patients were randomly divided into two groups; Group (A) received Ball/O-Ring attachment and Group (B) received Locator attachment. The retention of two groups were assessed by the digital forcemeter at 3 times (T); (T0) retention of the conventional complete denture, (T1) at time of insertion of implant retained mandibular overdenture and (T3) retention after three months of insertion of implant retained mandibular overdenture. The implant stability quotient (ISQ) was done using Magnetic Resonance Frequency Analyzer (Osstell, ISQ) at the time of loading then after 3 and 6 months. Results: The retention values before the insertion of overdenture (T0) were considerably low in comparison with those at time of insertion of overdenture (T1) and after 3 months from denture insertion (T3). Regarding the ISQ values, there were no significant difference between the two groups before and at the time of insertion of the implant while there was a significant difference between two groups with better stability resulted in the Locator attachment group after three months (p<0.05). Conclusion: Within the limitation of this study, both types of attachment systems; Ball/O Ring and Locator attachments, are reliable modalities for improving the retention and stability of implant retained mandibular overdenture with superior initial stability results for the Locator attachment.

A comparative study of dimensional stability of two popular commercially used denture base resins

Background: A good dimensional stability is a necessary prerequisite for successful complete denture retention and its functional efficacy. This study was conducted keeping in mind the cost factor and the need of a common man. Out of many available products, conventional heat cure resin (Dental Products of India [DPI] and Lucitone 199 [LUC]) are the standard of choice. For suitable understanding of these two products in accordance to the above-stated statement, the current study was conducted. Aim: This in vitro study was carried out to compare the dimensional stability of commercially available polymethylmethacrylate (PMMA) DPI and high-impact LUC denture base materials processed using a long curing cycle, with and without terminal boiling. Methodology: By using a chrome cobalt metal base plate, a total of forty specimens of acrylic base plates were fabricated. They consisted of two major groups of twenty specimens each, fabricated from conventional heat cure DPI and LUC heat cure resins. Each group so fabricated was further subdivided into two equal subgroups of ten specimens each, which were subjected to long curing cycle, with and without terminal boiling. The results for each group were compared by paired sample t-test for the studied objective, and data were analyzed by SPSS software version 20 (IBM Corporation, Armonk, NY USA). The level of statistical significance was fixed at the customary level ≤0.05. Results: The dimensional stability values of LUC were found superior (P Conclusion: PMMA reinforced with butadiene styrene fabricated using long curing cycle with terminal boiling showed the highest value of dimensional stability and the least was seen with conventional PMMA processed with long curing cycle without terminal boiling.

Is predicting masticatory function based on mandibular bone atrophy as defined by clinical and radiographic parameters possible? A clinical study

Statement of problemThe degree of mandibular bone atrophy can guide and determine the choice of prosthetic treatment. Although several methodologies have been proposed for classifying atrophy, the clinical and radiographic parameters considered for the classification of mandibular bone atrophy should be standardized. PurposeThe purpose of this clinical study was to evaluate the influence of methodologies of mandibular bone atrophy categorization on the masticatory function in complete denture (CD) wearers and to verify the relationship between these parameters according to the retention and stability of the mandibular CD. Material and methodsCD wearers were radiographically and clinically evaluated to determine the mandibular bone atrophy levels. Three classifications were adopted: the Cawood and Howell criteria, the Wical and Swoope criteria, and the Kapur classification. CD retention and stability were scored based on the Sato et al method. The masticatory function was evaluated by the multiple sieve method using optical test food to determine the masticatory performance (MP) indexes (median particle size, MP X50; homogeneity index, MP B) and the masticatory efficiency (sieves 4 and 2.8). ResultsIn this sample of 63 individuals (mean age of 67.4 years), atrophic participants presented significant differences in all radiographic parameters (Mann–Whitney test, P<.05) with both the Cawood and Howell and Wical and Swoope methodologies. No differences in masticatory function were found, except for atrophic participants classified by Wical and Swoope criteria, who had worse MP X50 (P=.047) than nonatrophic participants, with a medium effect size of 0.7. The retention of the mandibular CD significantly affected the masticatory outcomes, with higher values for MP X50 (P=.012) and MP B (P=.040) and lower values for masticatory efficiency, 2.8 (P=.008) for atrophic participants. The presence of mandibular bone atrophy showed an association with poor retention (P=.04) and poor stability (P=.002) when the Cawood and Howell criteria were adopted (Fisher exact test, P<.05). ConclusionsThe Kapur classification confirmed the clinical condition of the participants' atrophy, and the most clinically atrophic participants showed poor retention and stability of the mandibular CD. Only the poor retention directly affected the masticatory function. Radiographic evaluations alone did not provide sufficient data to determine the predictability of CD treatment regarding the participants' masticatory function. Radiographically, atrophic participants with poor retention had impaired mastication.

The Effect of Different Thickness of Two Types of Soft Liner on Retention and Electromyography of Complete Denture

Purpose: was to evaluate the effect of different thickness of two types of soft liner (silicone based soft liner and acrylic plasticizer soft liner) on retention and electromyography of complete denture. Material and Methods: Ten patients were selected Age ranging from 50-70 year. Patients were randomly divided into two groups (five patients each group). Group(I) : Each patient received maxillary and mandibular complete denture processed with heat cured acrylic resin denture base, where the mandibular denture was lined with silicone based soft liner (Promedica) with thickness 1mm (groupI-a) and 2mm (groupI-b). Group (II): Each patient received maxillary and mandibular complete denture processed with heat cured acrylic resin denture base, where the mandibular denture was lined with acrylic plasticizer soft liner (Dura base) with thickness 1mm (groupII-a) and 2mm (groupII-b). Retention was evaluated at insertion, after one month and after three months from delivery .Electromyographic activity was evaluated after one month and after three months from delivery. Result: the result of this study showed that there was significant increase in retention and electromyographic activity after lining of mandibular denture with silicone or acrylic based soft liner with thickness 2mm, also there was significant increase in retention after relining of mandibular denture with acrylic based soft liner when compared with silicone based soft liner, while there was no difference between electromyographic activity after relining of mandibular denture with silicon or acrylic based soft liner. Conclusion: The thickness of soft liner play an important role in retention and electromograghic activity of the masseter and temporalis muscles, Acrylic based soft liner is more retentive when compared with silicone based soft liner.

Evaluation of physical and chemical properties of saliva on retention of complete denture (In vitro study)

Evaluation of physical and chemical properties of saliva on retention of complete denture (In vitro study)

Effect of soft laser on osseointegrated dental implants supported maxillary overdenture

Background/ Aim: Many difficulties are encountered in providing a successful single complete denture treatment. Among these problems are the ways to provide comfort, function, proper esthetics and retention for the maxillary complete dentures in patients with opposing natural dentition. The aim of this study deals with successful rehabilitation of edentulous maxillary ridge (split-mouth technique) opposing a natural teeth prosthetically, retained with dental implants in the canine and posterior regions, using a flapless surgical technique, with an exposure of Low Level Laser Therapy (LLLT) after implant installment in order to evaluate its influence on the osseionegration, implant stability was evaluated using periotest at time of loading, 4 months and 6 months later to show the early success of dental implants placed into low- density bone. Also bone changes was evaluated by using digital periapical radiography with paralleling technique.Materials and methods: Following the split-mouth design, dental implants were inserted in the maxilla of 6 patients, the right side dental implants received LLLT ( laser side) with an output power of 0.5 UT and continuous mode was used to receive a total dose of 30 J per implant over 60 seconds, while the other side was the control side. The soft laser treatment was performed immediately after the surgery, 3 days and a week after surgery, then evaluated for stability during the follow-up period (at time of loading, 4 months and 6 months later) using periotest ,and further bone height changes using digital radiograph.Results: irradiated implants achieved a higher stability compared with control group during the entire follow-up period. At base line and after 4 months; there was no statistically significant difference between implant stability quotient (ISQ) values in the two sides. After 6 months; laser side showed statistically significantly higher mean ISQ values than control side.Conclusion: the present investigation demonstrated that 6 months after soft laser application significantly positively influenced implant stability and bone height around dental implants.

Mishmash Impression Technique for Managing Maxillary Anterior Fibrous Ridge

Introduction: Flabby or fibrous ridge is one of the consequences of long term wearing of complete dentures. It can develop where hyperplasic soft tissue replaces the alveolar bone and is a common finding, particularly in the upper anterior region of long term denture wearers. Forces exerted during impression making can result in distortion of the mobile tissue unless managed appropriately; such flabby ridges adversely affect support, retention and stability of complete dentures. Many impression techniques have been developed to help overcome this problem. While these vary in the method applied, they are similar in their complexity, are often quite time-consuming to perform and rely on materials not commonly used in contemporary general dental practice. The purpose of this article is to describe an impression technique for flabby ridges usingrubber base impression materials, routinely available in general dental practice.

Comparing required dislodging forces between different types of posterior palatal seal

Background: In this study forces required to dislodge a maxillary complete denture were compared for different types of posterior palatal seals " Group 1 single beading design , Group 2 double beading design and group 3 with butter fly posterior palatal seal.Materials and Methods :Using a specially designed strain gauge force transducer and strain measuring device ,the force required to dislodge a maxillary complete denture measured and compared. Ten male subjects are selected with age range 55-65 yrs, the primary impression made in the usual manner and the final impression made with zinc oxide euogenol paste after the border seal made with tracing stick impression compound ,then the master cast duplicated using a heavy body silicone impression materials in order to produce a three additional casts, then the casts scraped to incorporate the posterior palatal seals and produce the three groups .a denture base constructed after postdum scraping.Results: Comparing the three groups the results shows that a significant difference found between the group 1 and 2 and group 1 and 3 with no significant difference found between group 2 and 3. Using ANOVA Table with LSD.Conclusion: No Design Provide superior priority than the other type of posterior palatal seals but a double beading and butter fly posterior palatal seal can improve the retention of a maxillary complete denture.

Evaluation of the Functional Impression Technique with Various Impression Materials on the Surface Topography of Dental Stone Casts and Their Effect on Retention

Background: The accuracy of the final prosthesis is affected by the final impression technique and master cast production. The aim of the present study was to evaluate the effect of the functional impression technique with various impression materials on the surface characteristic of dental stone casts and their clinical effect on the retention of complete dentures. Method: Specimens of three impression materials/stone casts were fabricated. The specimens of the impression materials/stone casts were divided into three equal groups (I, II, and III). The impression materials used were as follows: tissue conditioner group (I), zinc oxide (ZEO) (group II) and poly (vinyl siloxane) (PVS) (group III). Cylindrical split aluminium moulds were designed to receive the impression materials and the stone mixture. The surface roughness of the stone cast specimens of the three groups (I, II, and III) was measured with a surface profilometer and analyzed by a scanning electron microscope. A clinical study included five severely resorbed mandibular edentulous alveolar ridges and edentulous maxillary arches. Each subject received three heat-cured acrylic resin dentures, fabricated using the functional impression technique. The three dentures were identical except for the different impression materials used from Groups I, II and III. The retentive force of each denture for each subject was measured. Result: The results of this study revealed that the mean value of surface roughness of the stone cast surface of group I was higher than group II and group III. A statistically significant difference was observed in surface roughness and the retentive dislodging force between the three studied groups. Although using a tissue conditioner as a functional impression material led to a high level of surface roughness and good retention, it could not produce the same smooth surface quality of PVS or ZEO. These data were supported by SEM analysis. The complete dentures for these patients require important oral and denture hygiene care. Conclusion: Complete dentures made using functional impression technique with PVC as a final impression material are more comfortable, retentive and stable.

Evaluation and Comparison of the Effect of Different Border Molding Materials on Complete Denture Retention: An in vivo Study

Different border molding materials have different qualities which help in recording fine details of tissues. The present study was conducted to evaluate and compare the effect of different border molding materials on complete denture retention. The present study was conducted on 10 completely edentulous patients in the age group of 50 to 70 years. On each patient, three different border moldings were completed. In group I, border molding was done with green stick impression compound. In group II, border molding was done with putty consistency addition silicone. In group III, border molding and final impression were done by polyether impression material in a single step. Permanent denture bases were fabricated with wire loop at the center. Retention was assessed in all three groups using a digital force gauge. Upon data compilation and preparation of spread sheets for concerned groups, it was subjected to statistical analysis using Statistical Package for the Social Sciences (SPSS) software version 21.0 for Windows. Mean age ± standard deviation (SD) was 57.40 ± 8.46 in group I, 57.40 ± 8.46 in group II, and 57.40 ± 8.46 in group III. The difference was nonsignificant (p > 0.05). The overall mean value for the group I was 4.59 ± 0.81. For group II, it was 4.7 ± 0.81. For group III, it was 6.72 ± 0.81. The difference was significant (p < 0.05). Green stick compound with light body final wash showed the lowest mean values of complete denture retention. Dentures made using polyether final impression material showed the highest mean values of complete denture retention followed by putty rubber base border molding with light body final wash. In this study, polyether showed the highest mean retentive value compared with other tested materials; therefore, it could possibly provide some future innovative means in achieving optimal denture retention.

A comparative analysis of salivary factors and maxillary denture retention in different arch forms: An in vivo study.

Aims:This study aims to find the effect of change in different salivary factors before and after complete denture insertion and to measure the maxillary denture retention in different arch forms.Materials and Methods:Thirty completely edentulous individuals (10 each of square, tapered, and ovoid arch form of maxilla) belonging to the age group of 40–70 years were selected. Salivary factors (flow, density, pH, viscosity, and total protein) were evaluated before and after denture insertion. Retention of maxillary denture was measured in all the different arch forms.Statistical Analysis:Student's independent sample's t-test was applied. The correlation was analyzed by Pearson's correlation analysis.Results:While mean flow rate and pH of saliva increased, mean viscosity, total protein, and density of saliva decreased after maxillary complete denture insertion. A positive correlation was found between retention and total maxillary basal surface area. Retention value was found to be greatest in square type and least in tapered type.Conclusions:Complete denture acts as a mechanical stimulant thus increasing flow rate and pH immediately after complete denture insertion. Density, total protein, and viscosity of saliva decreased after complete denture insertion which may be due to increase in water content of saliva. The retention of maxillary complete denture does not seem to depend on the rate of change of the salivary factors, before and after complete denture insertion. Total basal surface area and maxillary denture retention values were highest in square arch form and least in tapered arch form.

The effect of denture adhesive on the efficiency of complete denture in patients with different alveolar ridges

Background: Denture adhesives are used to improve retention, stability, and efficiency of complete dentures. Proper use of denture adhesives has benefits for patients. Evaluating the effect of denture adhesives on efficiency of complete dentures in patients with different alveolar ridges was the purpose of this study. Materials and Methods: This cross‑over randomized clinical trials study was conducted on 90 patients who were wearing well fitted complete dentures. The patients were categorized into three groups based on clinical and radiographic situations of residual ridges. Group I with mild resorption, group II with moderate resorption, and group III with severe resorption. The patients who had recently received their dentures and the primary complications had been resolved were asked to use denture adhesive according to the instructions. The patients answered two different questioners in 1 week and 2 months of using denture adhesive. The answers were analyzed by means of variance and Chi‑squared tests (P 0.05). Increased retention and adaptation made 64.4% of these patients willing to continue using the adhesive after the study. Forty‑three percent of patients reported moderate satisfaction of using this adhesive. Conclusion: Using denture adhesive in well‑fitted complete dentures resulted in an improvement in retention, talking, chewing, ease of use, self‑confidence, and efficiency of dentures. The use of denture adhesive is, therefore, recommended to patients wearing dentures with some problems. Key Words: Alveolar ridge, complete denture, denture adhesive, denture retention

Management of flabby ridge case: An arduous task in undergraduate practice

A fibrous or flabby ridge is a superficial area of mobile soft tissue affecting the maxillary or mandibular alveolar ridges. It can develop when hyperplastic soft tissue replaces the alveolar bone and is a common finding particularly in the upper anterior region of long-term denture wearers. Masticatory forces can displace this mobile denture-bearing tissue, leading to altered denture positioning and loss of peripheral seal. Unless managed appropriately, such “flabby ridges” adversely affect the support, retention, and stability of complete dentures. Many impression techniques have been proposed to help overcome this difficulty. This paper presents case report for prosthodontic rehabilitation of a patient with flabby ridge with McCord and Ahmad impression technique.

Association between Clinical and Subjective Analysis of Denture Adhesives on Retention of Maxillary Complete Dentures: A Comparative Study

Association between Clinical and Subjective Analysis of Denture Adhesives on Retention of Maxillary Complete Dentures: A Comparative Study

Evolution of Techniques in Recording Posterior Palatal Seal – A Review

A perfectly constructed denture with significant retention will aid in patient’s esthetic, functional and psychological factors. Retention of complete denture is based on both patient and denture factors. Fines sand knowledge of the clinician and technician plays a major role in denture factor. In a maxillary denture, border seal in the posterior region is taken care by proper recording of Posterior Palatal Seal (PPS). Lack of success of many dentures is due to improper formation of distal palatal length and absence of a posterior palatal seal. Generally, the diagnostic evaluation and enplacement of posterior seal are given only minor attention in complete denture fabrication. This article reviews the conspicuousness of the posterior palatal seal and various techniques of recording PPS.