Retention Of Maxillary Denture Research Articles

Retention and Patient Satisfaction of Conventional Over Simplified Non-Balanced Maxillary Removable Complete Dentures.

Insufficient evidence is available in quantifying the retention between simplified and conventional non-balanced dentures. The aim of the study was to quantify and compare the maxillary denture retention and patient satisfaction between conventional and simplified removable non-balanced complete dentures. This randomized clinical trial recruited 44 patients (n=22) with definitive criteria. Simplified and conventional non-balanced complete dentures were fabricated for the intervention groups. The denture retention of maxillary complete dentures was assessed with a dynamometer and patient satisfaction with a visual analogue scale. The mean retention of maxillary denture and satisfaction were recorded at 0-,3-, and 6 - month intervals. The data were statistically analyzed. (α=.05). The mean ±SD of retention for conventional denture at 0, 3, and 6 months by dynamometer ranged from 122 ± 1.64 N to 121 ± 1.57 N and 111 ±1.45N to 110±1.97 N for the simplified denture. The mean ±SD of visual analogue score varied between 9.45±0.35 to 7.19± 0.69 for conventional dentures and 8.00 ±1.39 to 6.81±0.82 for simplified dentures. The repeated ANOVA, t-test and post-hoc Bonferroni revealed statistically significant differences between the two types of denture. (P⟨.05) Conclusion: Numerical retention and satisfaction were higher in conventional non-balanced dentures than simplified dentures.

A Randomised Controlled Trial of Postoperative Sensitivity after Class II Restoration with Bulk-Fill vs Conventional Composites.

Bulk-fill composites may simplify posterior restorations, saving time and reducing technical complexity. Post-operative sensitivity is a risk of posterior composites; bulk-fill composites could mitigate this. This single centre, double-blinded, parallel groups randomised controlled trial compared postoperative sensitivity following restoration of class II carious lesions with bulk-fill or conventional, layered composite. there will be no difference in post-operative sensitivity between the two materials. Participants requiring class II restoration of posterior teeth were randomised to bulk-fill (FU) (Coltene Fill-UpTM) or conventional, layered (BE) (Coltene Brilliant Everglow) composite. Allocation was concealed during cavity preparation. Only the operating dentist knew allocation. The outcome was 24 h post-operative sensitivity. 41 patients were randomised (20/group). Two patients from FU group were excluded from analysis (factors unrelated to intervention). There was no difference in postoperative sensitivity at 24 h nor any time point. Only participant age and baseline sensitivity scores significantly impacted post-operative sensitivity. One restoration debonded in FU group at 10 days, with no other adverse effects. No difference in time taken to place restorations was seen. Within the study's limitations, post-operative sensitivity after class II posterior restorations was no different in bulk-fill restorations compared with conventional, incrementally cured composite.

Five years clinical outcome of maxillary mini dental implant overdenture treatment: A prospective multicenter clinical cohort study.

The long-term clinical outcome of mini dental implants (MDIs) to support an overdenture is underreported especially in severely atrophic maxillae and when installed flaplessly. The current report is a 5-years follow-up of the previously published 2- and 3-years clinical outcome of MDIs supporting a maxillary overdenture in narrow alveolar ridges. MDI survival, marginal bone level, peri-implant health, technical complications, and oral health related quality of life (OHIP) and respective changes over time are reported. Subjects aged 50 years or older, in need of improvement of maxillary denture retention, were included. The MDIs were 2.4 mm diameter one-piece tapered implants, Class 4 pure Titanium, and lengths 10 or 11.5 mm. Under local anesthesia, 5-6 MDIs were placed in atrophic maxillae with a free-handed flapless approach. One week postoperative the denture was adapted with a retentive soft reliner. The final prosthetic connection was established after 6 months with a metal-reinforced horse-shoe denture. Clinical outcome after 5 years was assessed with probing pocket depts (PPD), bleeding on probing (BoP), and additional cone beam computed tomography (CBCT) MDI bone level measurements were performed. Oral Health-Related Quality of Life (OHRQoL) investigated with OHIP-14 was assessed preoperative, during provisional loading, and after final prosthetic connection up to 5 years. Initially, 31 patients (14 females and 17 males) with mean age 62.30 underwent treatment. In the provisional loading interval, 16 patients encountered 32/185 MDIs failures, resulting in a failure of 17.3%; 170 MDIs were functionally loaded in 29 patients. Additionally, 14 implants were lost in three patients, all of whom had had already previous failures. Reimplantation of 17 MDIs were performed during the provisional loading and 2 MDI after functional loading. After 5 years, the absolute implant failure rate was 46/204 (22.5%), corresponding to a cumulative failure rate of 23.2%. Prosthetic failure was observed in four patients due to implant loss and in two patients related to excessive one-piece implant ball attachment wear, making the 5-years prosthetic success 80.0%. The mean PPD and absence/presence of BoP for 149 implants at 5 years was 4.3 and 0.2 mm, respectively. Average mesial-distal-vestibular-palatal bone loss in the interval 2-5 years was 0.08 mm. No statistically significant difference in marginal MDI bone loss between male or female (p = 0.835), smoking and nonsmoking (p = 0.666) was observed. The five-years total measured CBCT interdental bone level (mesial and distal) correlates with the 5-years PPD (Pearson 0.434; p = 0.01). After 5 years, OHRQoL with the treatment procedure was assessed in 27/31 participants. Decreasing mean total OHIP-14 scores with improved OHRQoL, was observed in 27/31 participants, with values of 21.3 at baseline to 15.6 at the time of provisional loading which significantly (p = 0.006) decrease to 7.3 at the final prosthetic connection. The next 3-5 years further decrease was observed with 6.5 and 4.96, respectively. Maxillary MDIs for overdentures are an accessible and acceptable treatment option. Although after 5 years between one fifth and one fourth of the MDIs were lost, prosthetic success remains 80.0% and high OHRQoL could be achieved.

Simplified versus conventional complete dentures: A randomized crossover clinical trial

Statement of problemA simplified approach to complete denture treatment, omitting the border molding and definitive impression appointment, was suggested as an alternative to the conventional approach. However, comparison clinical trials are lacking. PurposeThe purpose of this randomized crossover clinical trial was to assess the satisfaction of edentulous patients and their oral health impact profile when provided with complete dentures fabricated through the simplified or the conventional approach. Material and methodsForty completely edentulous patients seeking complete dentures were randomly divided into 2 groups (n=20). Each group received 2 sets of dentures. The first group received conventionally fabricated complete dentures, and the second group received complete dentures fabricated through the simplified approach. After 2 months, participants rated their overall satisfaction and their satisfaction regarding comfort, retention, stability, and efficiency of mastication and speech on a 100-mm visual analog scale (VAS). Participants also filled out the oral health impact profile for edentulous patients (OHIP-EDENT) questionnaire. Each group was then given the alternate set of dentures and reviewed again after 2 months. The results were analyzed by using the Mann-Whitney U and Wilcoxon-signed rank tests (α=.05). ResultsThe simplified complete dentures had significantly higher VAS scores for general satisfaction with maxillary dentures (P=.036), satisfaction with retention of maxillary dentures (P=.002), satisfaction with stability of maxillary dentures (P=.003), and satisfaction with speaking (P=.002). No statistically significant differences were found between the 2 groups regarding the other VAS items or OHIP-EDENT scores (P>.05). ConclusionsThe simplified denture fabrication approach required fewer appointments and resulted in higher patient satisfaction and similar OHIP-EDENT scores compared with the conventional approach. The simplified approach can be recommended over the conventional approach.

Prospective clinical study of bilateral balanced occlusion (BBO) versus canine-guided occlusion (CGO) in complete denture wearers.

Previous studies have often discussed occlusal concepts for complete dentures without formulating a recommendation. Various options are available, the most common ones being canine-guided occlusion (CGO) and bilateral balanced occlusion (BBO). We designed a prospective randomized study to compare these two schemes with the goal of formulating a recommendation. Forty patients could be evaluated. In a crossover design, they were randomized to a CGO>BBO group and a BBO>CGO group, each starting out by wearing their dentures with the first occlusal scheme for 3months, followed by a first investigator- and patient-centered assessment. Then, each patient was transitioned to the other occlusal scheme by replacing the denture setup in the dental laboratory, followed by another 3months of intraoral use and a second assessment. Wilcoxon-Mann-Whitney and marginal homogeneity tests were used for statistical analysis. All statistically significant differences favored the CGO concept. Based on patient ratings, the CGO>BBO group preferred its esthetics (p= 0.02) and the BBO>CGO group its mandibular retention (p= 0.05), phonetics (p= 0.03), and masticatory function (p= 0.01). Based on investigator assessments, maxillary denture retention was found to significantly improve among the BBO>CGO patients after transition to CGO (p= 0.01). Within the limitations of this study, canine guidance can be recommended as a comfortable alternative to bilateral balanced occlusion for complete dentures. This recommendation can reduce the time requirements for the fabrication of complete dentures in dental laboratories.

A Study to Evaluate and Compare Efficacy of Denture Adhesives in Complete Denture Patients

Abstract Aim To evaluate and compare the retentive ability of commonly available denture adhesives in completely edentulous patient at different time intervals. Materials and Methods Ten completely edentulous patients were included in the present in vivo study. Complete dentures were fabricated, and retention of maxillary denture was recorded with and without denture adhesives (Fixon Supergrip powder, Fittydent paste, Super Poligrip powder, and Fit Fix powder) at 15 minutes, 1 hour, and 2 hours intervals for all patients. Force at which denture dislodged was recorded with digital force gauge and was considered as retentive value. Data obtained were tabulated and subjected to statistical analysis using SPSS software version 17.5 (Trial version). Intragroup comparison was done using paired t-test. Intergroup comparison was done using analysis of variance (ANOVA) followed by post hoc Tukey's test. p-Value ≤ 0.05 was considered significant in all tests. Results Mean retention force of maxillary complete denture achieved with all four denture adhesives was significantly better than without adhesive at all time intervals. Intragroup comparison showed that each adhesive exhibited no change (p ≤ 0.05) in retention from 15 minutes to 2 hours interval except Fixon Supergrip powder adhesive which showed significant decrease (p = 0.009) in retention from 1 hour to 2 hours. Intergroup comparison revealed no statistically significant difference in retention of maxillary dentures with different denture adhesives at all time intervals (p ≥ 0.05). Conclusion Within the limitations of the study, it was concluded from the present study that all four adhesives irrespective of their form can be used to improve retention of dentures.

UPPER COMPLETE DENTURE

Objectives: Retention of maxillary denture is obtained by many factors includingphysical and physiological factors. Effective seal is obtained easily at buccal and labial bordersof maxillarsy. However, it is difficult to obtain peripheral seal at posterior border of upper dentureas there is no soft tissue draping. Fovea palatinae which has been considered as reliableanatomical guide in unmutilated mouth. Fovea palatinae are close to vibrating line and are insoft tissue making them useful as reference points for posterior limit of the denture. Our aim toidentify the relative position of vibrating line with reference to the fovea palatinae for determiningposterior border of the upper complete denture. Setting: Department of Prosthodontics,Lahore Medical and Dental College, Lahore. Method: 160 subjects were included in this study.The patients fulfilling the inclusion criteria, Fovea palatinae was located and marked with theindelible pencil in the soft palate. Subjects were instructed to rehearse the “ah” sound in normal,unexaggerated way. Location of the vibrating line was marked with same indelible pencil.The position of the vibrating line whether in front, at or behind the fovea palatinae was noted.Results: Our study results shows in 72(45%) subjects vibrating line lies in front, 81(50.6%)subjects it lies at and 7(4.4%) subjects lies behind the fovea palatinae. Conclusion: Seal mustbe situated just anterior to the vibrating line and distal to hard palate at compressible tissue ofsoft palate.

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.

A clinical evaluation denture adhesives used by patients with xerostomia.

The purpose of study was to analyze the participants’ opinions concerning the effectiveness of 6 denture adhesives (DA).The study group included 60 participants. Criteria for selecting the patients were as follows: reduced retention and stabilization of maxillary complete dentures and xerostomia. These features were evaluated on basis of clinical examination and standard sialometry tests (u-SFR). Retention of maxillary dentures was scored by modified Kapur index before application of DA. All participants were divided randomly into 6 groups regarding the use of the 6 DA during a 6-month period. After this time, participants completed an HRQL questionnaire.DA noticeably improved retention and stabilization of maxillary complete dentures. DA in the glue form had the best retention effectiveness in participants with xerostomia. These materials are difficult to clean from the denture base. The data are presented in tables and figures.The results of the study collected positive influence of adhesives on retention of dentures in xerostomia patients. The cleaning dentures and denture bearing tissues was difficult.DA help in the use of prostheses, but it is also necessary for the treatment of the causes and symptoms of xerostomia.

Replacement of a mandibular implant-fixed prosthesis with an implant-supported overdenture to improve maintenance and care

PatientsA 69-year-old woman presented to the Osaka University Dental Hospital. She had two chief complaints, (a) food accumulation under the lower teeth and (b) poor maxillary denture retention while eating. On clinical examination the patient presented with a maxillary complete denture and fixed mandibular implant prosthesis. For preventing food accumulation under the fixed implant prosthesis and to keep the maxillary denture stable by providing posterior occlusal contact for bilaterally balanced occlusion, the use of a mandibular implant-supported overdenture with self-adjusting magnetic attachments provided a prosthetic solution for this patient. After provided the new dentures, the patient was pleased and was comfortable with the aesthetic, stability and retention of the dentures. There were no discernable clinical or radiographic changes after 1 year of use. DiscussionTo prevent food accumulation beneath the fixed implant prosthesis and maintain the stability of the maxillary denture by providing posterior occlusal contact for bilaterally balanced occlusion, a mandibular implant-retained overdenture with magnetic attachments was used to provide a prosthetic solution for this patient. ConclusionIn this clinical case, an implant-fixed prosthesis in the edentulous mandibular region was replaced into an implant-supported overdenture with considerations for (a) preventing the food accumulation beneath the lower prosthesis, (b) achieving the proper occlusion in the posterior part for maxillary denture stability and (c) ease of maintenance and care for the prostheses.

Changes in the edentulous maxilla with ball and telescopic attachments of implant-retained mandibular overdentures: a 4-year retrospective study.

This retrospective study investigated the clinical and radiographic changes in the edentulous maxilla in patients with either ball or telescopic attachments of implantretained mandibular overdentures. Thirty-two completely edentulous patients (21 males and 11 females) received two implants in the canine region of the mandible. New maxillary complete dentures and mandibular overdentures were fabricated. Overdentures were connected to the implants either with ball (group 1, n = 16) or telescopic (group 2, n = 16) attachments. Retention and stability of the maxillary denture as well as mucosal changes of the maxillary ridge were recorded after 4 years of denturewearing. Traced rotational tomograms were used for measurements of maxillary alveolar bone loss. The proportional value between bone areas and areas of reference not subject to resorption was expressed as a ratio (R). Change in R immediately before (T0) and after 4 years (T4) of overdenture insertion was calculated for the anterior and posterior regions of the maxilla. After 4 years of denture-wearing, maxillary denture retention was significantly higher in group 1 than in group 2, while occurrence of flabby ridges was significantly higher in group 2 than in group 1. The change in R of the anterior region of the maxilla was significantly higher than the change in the posterior region in both groups. Group 2 showed significant anterior residual ridge resorption compared to group 1. Telescopic attachments for implant-retained mandibular overdentures are associated with increased maxillary ridge resorption and flabbiness, and decreased maxillary denture retention when compared to ball attachments.

Tongue support of complete dentures in the elderly

This study aimed to evaluate the tongue’s role in supporting maxillary denture retention (MDR), in providing additional stabilization for the mandibular denture, and the tongue’s relationship with the oral health-related well being in elderly complete denture patients. Four hundred elderly individuals, 263 males and 137 females, were enrolled in this study. All were older than 65 years, and wore complete dentures. Intraoral examinations were performed in accordance with the 10 criteria embedded in the Functional Assessment of Dentures (FAD). Participants also received personal interviews and completed the Oral Health Impact Profile-14 (OHIP-14) questionnaire. The associations between MDR (tongue support) with the mean OHIP-14 sum scores and FAD categories were analyzed using the t test or analysis of variance (ANOVA). Combinations of MDR (tongue support), MDR (resistance to vertical pull), and mandibular denture stability (anterior–posterior movement) were also assessed with the remaining FAD criteria and OHIP-14 domain scores. Individuals with adequate MDR (tongue support) were significantly associated with denture articulation, denture occlusion, MDR (resistance to vertical pull), maxillary denture stability (pronounced rocking), and mandibular denture stability (anterior–posterior movement). When individuals with adequate MDR (tongue support) were analyzed in conjunction with adequate MDR (resistance to vertical pull) and adequate mandibular denture stability (anterior–posterior movement), significant associations were observed with the mean OHIP-14 sum score and three individual OHIP-14 domains: functional limitation, physical pain, and physical disability (p ＜ 0.05). The mean OHIP-14 sum score was lower among individuals with both adequate MDR (tongue support) and inadequate MDR (resistance to vertical pull) than among participants with both inadequate MDR (tongue support) and inadequate MDR (resistance to vertical pull). MDR (tongue support) demonstrated significant differences from denture occlusion, denture articulation, MDR (resistance to vertical pull), maxillary denture stability (pronounced rocking), and mandibular denture stability (anterior–posterior movement). MDR (tongue support), in conjunction with both adequate MDR (resistance to vertical pull) and adequate mandibular stability (anterior–posterior movement), were significantly associated with the individuals’ oral health-related well being.

Clinical and histopathological analysis of intramucosal zirconia inserts used for improving maxillary denture retention

Intramucosal inserts made of zirconia ceramic have been used for the rehabilitation of edentulous patients. This study aimed to follow up on patients with complete dentures having intramucosal zirconia inserts and to perform a histological analysis of biopsies of the epithelium surrounding the inserts. Twelve 31-66-year-old subjects of both genders received complete denture treatment having the intramucosal inserts in place. Detailed clinical, prosthetic and surgical procedures were described. Clinical exams were done on postoperative days 3, 7, 15, 120 and 360. One year after denture placement, the subjects received local anesthesia and the tissues surrounding the insertion sites in the alveolar ridge were removed using a scalpel blade. Biopsies were fixed for up to 48 h in 10% phosphate-buffered formaldehyde and 5-microm-thick sections were cut and stained with hematoxylin and eosin and Gomori Trichrome. Immunohistochemistry was used to identify endothelium (anti-CD3) and T lymphocytes (anti-CD31). Removing and reinserting the denture was painful until day 15, but all patients reported a marked increase in the retention and stability of the complete denture with little or no discomfort after 30 days. The histopathological analysis showed that zirconia inserts were well tolerated by the oral mucosa, with the presence of collagen fibers in the tissue around the insert, with mild inflammatory response and allowing reepithelialization, expressed by parakeratosis, epithelial hyperplasia and presenting granular layer. In conclusion, intramucosal zirconia inserts did not affect the health of oral mucosa and provide adequate retention and stability of the complete denture and comfort to the patients.

A functional impression technique for capturing the superior position of the soft palate

The posterior border and the posterior palatal seal are 2 of the most important areas for maxillary denture retention.1 The determination of these areas is a critical step in impression making. The soft palate can move in a superior position, which may result in air leakage in the posterior area of a complete denture.2 To prevent dislodgement of the denture, the soft palate must be impressed in its superior position when making the definitive impression.3 By creating this contact, air is prevented from passing under the denture during speech or respiration.

Subjective Assessment by Patients of the Efficiency of Two Denture Adhesive Pastes

This study evaluated the subjective responses of 30 denture wearers with regard to the effectiveness of two denture adhesive pastes. Thirty patients responded to questions related to retention, chewing ability, taste, duration of adhesives in the mouth, and removal; comparing the use of two denture adhesives based on polymethylvinylether-maleic anhydride compounds or carboxymethyl cellulose. The denture adhesive paste based on polymethylvinylether-maleic anhydride (PVM-MA) compound was rated higher (73% and 87%) than carboxymethyl cellulose (CC) adhesive paste (60% and 37%) on chewing ability and duration in the mouth (p= 0.0001 and p= 0.0001, respectively) by experienced denture wearers in both maxilla and mandible. There were no statistically significant differences between the two denture adhesive pastes on the retention of maxillary dentures, taste, and removal of the adhesive (p= 0.08, p= 0.67, and p= 0.41, respectively). All subjects responded that the retention of their dentures was either a little better or much better when using either of the adhesive pastes.

Evaluation of unstimulated flow rates of whole and palatal saliva in healthy patients wearing complete dentures and in patients with Sjogren's syndrome

Statement of problem The palate and upper lip are the regions of oral mucosa covered with the least amount of saliva. These areas are important for maxillary denture retention and stability. Thus, patients with xerostomia or hyposalivation may have problems with the stability of maxillary complete dentures. Purpose The purpose of this study was to compare the unstimulated whole saliva (UWS) and palatal saliva (PS) flow rates of healthy patients wearing complete dentures and patients with Sjogren's syndrome (SS) and to determine whether xerostomia or hyposalivation has a negative influence on maxillary complete denture stability. A further aim was to determine the influence of new complete dentures on UWS and PS flow rates in healthy individuals. Material and methods Thirty-five complete denture wearers, 24 healthy individuals (controls) and 11 patients who fulfilled the diagnostic criteria for primary Sjogren's syndrome (as proposed by the European Community Study Group) were investigated. All participants were questioned about possible subjective oral complaints (xerostomia or instability of the dentures) through use of a standardized questionnaire. In the first part of the study, UWS and PS flow rates of the healthy subjects (controls) and of the SS patients were measured at the initial visit. The flow rate of UWS (mL/min) was collected by the “spitting” method; saliva was collected into preweighed vessels for 5 minutes while subjects were seated in an upright position. Patients were asked to refrain from smoking, eating, and drinking for 2 hours prior to the test session, to avoid swallowing, and to make as few movements as possible during the procedure. The PS flow rate (μL/min/cm 2) was measured using previously weighed filter paper discs placed bilaterally in the region of the maxillary second molars, 15 mm palatally from the edentulous ridge, for 30 seconds. The measuring vessels and paper discs were weighed before and after each collection. In the second part of the study, new complete dentures were fabricated for healthy patients. Flow rates of UWS and PS were measured 7 days after the insertion to compare data with prefabrication values. Mann-Whitney and Wilcoxon rank sum tests and chi-square test were used to analyze the data (α=.05). Results The UWS flow rates were significantly lower in SS patients compared to healthy controls (0.36 ± 0.33 vs 0.09 ± 0.11 mL/min, P<.05), yet the PS flow rate for both groups was not significantly different. Although every SS patient had xerostomia, and 8 out of 11 had hyposalivation, no patient complained about denture instability. Neither UWS flow rate (0.36 ± 0.33 mL/min and 0.39 ± 0.35 mL/min) nor PS flow rate (1.66 ± 0.99 μL/cm 2/min and 1.86 ± 0.45 μL/cm 2/min) was different from the preinsertion values after 1 week of new denture insertion in healthy patients. Conclusion Palatal mucous saliva may help stabilize the maxillary complete denture in patients with hyposalivation. The results suggest that neither UWS or PS flow rate are influenced by the placement of new dentures in complete denture wearers.

A comparison of patient's satisfaction between complete and partial removable denture wearers

Abstract Objectives . The aim of this study was to compare satisfaction between complete denture (CD) and Kennedy Class I removable partial denture (RPD) wearers. Materials and methods . A total of 156 CD and 112 RPD wearers took a part in this study. From the primary group of the examined patients, only those whose RPDs and CDs were assessed as excellent or very good by the dentist, took a part in this study. Patients graded satisfaction of their dentures by using an analogue scale from 1 to 5 (1=unsatisfactory; 5=excellent). Results . Both CD and RPD wearers were mostly satisfied with their dentures (the distribution of the scores of the patients' assessments was skewed towards the highest scores; more than half of the patients scored all the examined variables to the best score category). Complete Denture wearers were significantly more satisfied with chewing, speech and retention of maxillary denture than RPD wearers ( P P P >0.05; N.S.). Conclusions . A majority of CD and RPD wearers were satisfied with the dentures. CD wearers were more satisfied with speech, chewing and retention of maxillary denture, while RPD wearers were more satisfied with the retention and the comfort of wearing mandibular denture. Different groups of denture wearers have to make significant, but different adjustments to wear their dentures successfully.

A comparison of patient's satisfaction between complete and partial removable denture wearers

Objectives. The aim of this study was to compare satisfaction between complete denture (CD) and Kennedy Class I removable partial denture (RPD) wearers. Materials and methods. A total of 156 CD and 112 RPD wearers took a part in this study. From the primary group of the examined patients, only those whose RPDs and CDs were assessed as excellent or very good by the dentist, took a part in this study. Patients graded satisfaction of their dentures by using an analogue scale from 1 to 5 (1=unsatisfactory; 5=excellent). Results. Both CD and RPD wearers were mostly satisfied with their dentures (the distribution of the scores of the patients' assessments was skewed towards the highest scores; more than half of the patients scored all the examined variables to the best score category). Complete Denture wearers were significantly more satisfied with chewing, speech and retention of maxillary denture than RPD wearers ( P<0.05). Removable partial denture wearers were significantly more satisfied with the retention and the comfort of wearing mandibular denture ( P<0.05). There was no significant difference between CD and RPD wearers for general satisfaction with their dentures, aesthetics and comfort of wearing maxillary denture ( P>0.05; N.S.). Conclusions. A majority of CD and RPD wearers were satisfied with the dentures. CD wearers were more satisfied with speech, chewing and retention of maxillary denture, while RPD wearers were more satisfied with the retention and the comfort of wearing mandibular denture. Different groups of denture wearers have to make significant, but different adjustments to wear their dentures successfully.

Salivary secretion and denture retention

Correlations between the retention of complete dentures and flow rates of the palatal and parotid glands were studied in 86 patients. The determination of secretion rates and forces of the forward leverage leading to a dislocation of the dentures showed a narrow correlation between the secretion of palatal glands and the retention of maxillary dentures. The retention of mandibular complete dentures is adversely influenced by the secretion rate of minor salivary glands. However, there is no correlation between the flow rate of parotid saliva and the retention of either denture. In addition, the medicinal stimulation of salivation showed that an increase of mucus secretion induced an improved retention of maxillary complete dentures.

Measurement of oral status and treatment need among subjects with dental prostheses: Are the measures less reliable than the prostheses? Part II: Treatment need in removable prosthodontics

Evaluation of treatment need in removable prosthodontics has been an important component of many epidemiologic and clinical oral health surveys. Accurate measurement of need for care enhances health care program planning, quality of care evaluation, and good clinical and health services research. Unfortunately, similar to the measures of oral and prosthesis status discussed in Part I of this review, measures of treatment need in removable prosthodontics have generally been neither reliable nor valid, and have lacked scientific credibility. Part II describes existing measures for treatment need in removable prosthodontics.