Maxillary Partial Denture Research Articles

Clinical Evaluation of Impact of Acrylic Partial Dentures on the periodontal conditions of abutments

Aim: To evaluate the impact of wearing removable partial dentures on the periodontal health of abutments and find outtheage and gender association. Study design: Descriptive case series. Place and duration: Prosthodontic department of Lahore Medical and Dental College Lahore, from15th January till 15thJuly 2023. Methodology: A total of 70 patients of both genders participated in the study. Removable dentures were delivered to the patients and they were recalled after one month of denture insertion to evaluate the abutment health, gingival recession was checked in terms of its presence or absence, plaque and gingival health index assessment were done using Loe and Silness index. Tooth mobility was checked by using Millar’s classification. Mean and SD was computed for quantitative data. Age and gender correlation was assessed using Pearson Chi -square test. Significant level was set to p<0.05. Results: A total 41.4%males and 58.6% females were selected. A total of 68.6% maxillary partial dentures whereas 31.4% mandibular partial dentures were inserted. Gingival health index showed maximum patients with good health 57.1%. Dental plaque index of maximum patients 77.1% fell under zero score. Tooth mobility score of zero was frequently found in abutments 78.6%. Gingival recession around the abutments after one month of denture insertion was found in 15.7%whereas 84.3% abutments remained healthy. Association of Gingival index, plaque index, tooth mobility and gingival recession with gender did not show statistical significance however with respect to age significant results were obtained. Tooth mobility had no association with age. Conclusion: Removable partial dentures use does not disturb the periodontal health of abutments if well fabricated dentures are provided and good oral hygiene maintenance protocolsare followed. Patients’ education regarding denture use along with regular recall visits are of utmost importance. Keywords: Abutment, Acrylic dentures, dental plaque, Removable partial dentures, Periodontal health, periodontal diseases.

The residual dentition among home-based older New Zealanders receiving living support.

There have been no detailed descriptions of residual dentition patterns among older people living in the community. To describe the residual dentition and associated oral health-related quality of life among older New Zealanders living in their own homes with government-funded assistance. Using nationally representative data, we determined the residual dentition arrangement and Kennedy classification for each dental arch. Individuals were categorised according to their maxillary-mandibular dental configuration and prosthesis use. Data were weighted to make the estimates generalisable to the source population. Of the 895 clinically examined participants, 47.8% were dentate. One-quarter of those had maxillary tooth-bound saddles opposing a partially dentate mandible. Pasifika (people of Pacific Islands ethnicity) were most likely to have retained all of their dentition, while only the Māori ethnic group had no participants with a dentate arch. Only one in three of those with partially dentate upper and lower arches wore any maxillary denture; one in ten wore some form of mandibular denture. Partial dentures were common among those with an opposing edentulous jaw. Maxillary partial dentures were twice as common as their mandibular counterparts. Residual dentition patterns in older people are diverse and complex, and meeting their prosthodontic needs is not straightforward.

Association Between Patient Reported Removal of Dentures for Eating and Risk of Malnutrition in the Elderly

Abstract Objectives Replacement of natural dentition with dentures can impact the ability to consume foods and ultimately impact nutrition status. The objective of this study was to explore associations between patient-reported removal of dentures for eating and risk of malnutrition, using Self Mini Nutritional Assessment (Self-MNA) total and select component scores. Methods A cross-sectional study of data obtained from the Rutgers School of Dental Medicine (RSDM) clinic electronic health record for unduplicated patient visits between June 2015 and May 2019 was utilized for analysis. Data from adults ≥65 years with at least one denture (maxillary or mandibular) were included. Chi-square, Fisher's exact and Kruskal-Wallis tests were used to test associations; a Spearman rank-order correlation analysed the relationship between Self-MNA scores and patients’ responses to a question on whether they removed their denture(s) for eating. Statistical significance was set at P ≤ 0.05 a priori. Results The mean age of the sample (N = 357) was 73.4 ± 6.8 years (range = 65–94 years); 60% (n = 217) were female. The most common denture type was a combination of mandibular partial and maxillary partial dentures (n = 91, 26.7%); 35% (n = 103) reported removing their denture(s) for eating.There were no significant relationships between reported removal of dentures for eating and self-MNA total score (P = 0.63), a decline in food intake (P = 0.18) or weight loss (P = 0.75) respectively. Those with complete Self-MNA data (n = 33) who reported removal of dentures for eating (39%), had a greater degree of weight loss (>7pounds) and decreased intake (severely decreased) than those who reported they did not remove their dentures for eating (61%). Conclusions One-third of the patients in this sample removed their dentures for eating. Although not statistically significant, there was a trend towards greater weight loss and decreased intake among those who removed their dentures for eating compared to those who did not. Future research should utilize a larger sample to examine the relationship between denture removal for eating and nutrition status. Funding Sources None.

Relationship between Polishing Techniques and Bacterial Count on Different Denture Base Materials

Introduction: Wearing of dentures cause alteration in the oral microflora and increasing in number of bacteria and candida. The polished and fitting surfaces of the denture are both affected. Different polishing techniques influence the total count of bacterial accumulation on the denture surface. Aim: To count the bacterial colonies after polishing three denture base materials before and after six months of denture wearing by different polishing techniques. Materials and Method: Eighteen patients were randomly selected for construction of maxillary partial denture. They were divided into 3 groups: Group 1: Patients received conventional heat-cured PMMA (Acrostone) denture. Group 2: Patients received thermoformed polyamide (NEWULTRA) denture. Group 3: Patients received thermoformed acetal (Bio Dentaplast) denture. In each group, three patients had their dentures polished by pre polishing with brown rubber disc and fine pumice with wet rag wheel, and the other three patients with the same technique but followed by tripoli compound with dry rag wheel. Evaluation of bacterial counting was conducted before denture wearing and after six months of denture wearing. Swabs were taken from the palate of the patients and bacteria were counted. Findings: No significant difference was found between technique no. I and no. II in decreasing the bacterial count between the tested materials. Thermoformed polyamide showed the highest bacterial count after six months of wearing denture polished by technique no. II followed by thermoformed acetal and heat-cured PMMA. Conclusion: The second polishing technique produced less surface roughness and bacterial colonization on the tested materials than the first one.

Clinical Evaluation of Retention of Metallic Versus Thermoplastic Resin Frameworks in Maxillary Distal Extension Cases

Background and Objective: Acetal resin has been introduced as an esthetic partial denture material. However, the retention of this material when compared to cobalt-chromium (Co-cr) frame works still unclear when applied clinically. Purpose: To evaluate the retention of (acetal resin) as compared to (Co-cr)frame works and clasps. Materials and Method: The present study is a randomized controlled trial that included 24 healthy patients with Kennedy class I partially edentulous maxilla and dentulous mandibles. The patients were selected from the out-patient clinic (Dep. of Prosthetic Dentistry, Minia University) and divided randomly into two equal groups according to the used denture base material; Group 1 received maxillary partial denture with (Co-cr) clasps and frameworks. Group 2 received maxillary partial denture with acetal resin clasps and frameworks. Retention of the prosthesis was evaluated at partial denture insertion, after 3, 6 and 12 months. Paired t-test was used at p ≤ 0.05 to assess the changes in the above parameter in each group. Student t-test was used to compare between the two groups. Results: Retentive force mean values of thermoplastic group were significantly lower than metallic group at denture insertion and at all follow up intervals. Conclusion: Acetal resin frameworks and clasps provide lesser retention values when compared to chrome cobalt. Clinical Implications: Although there was lesser retention power of acetal resin than Co-cr, further study has to be done regarding various thicknesses and designs of clasps and framework for its successful dental application.

Effect of phytate and zinc ions on fluoride toothpaste efficacy using an in situ caries model

ObjectivesTo compare and explore the dose-response of phytate-containing 1150 ppm fluoride toothpastes on model caries lesions and to determine the impact of zinc ions. MethodsThis was a single-centre, randomised, blinded (examiner/laboratory analyst), six-treatment, four-period crossover, in situ study in adults with a removable bilateral maxillary partial denture. Study treatments were toothpastes containing: 0.425% phytate/F; 0.85% phytate/F; 0.85% phytate/Zn/F; F-only; Zn/F and a 0% F placebo. Where present, F was 1150 ppm as NaF; Zn was 0.3% as ZnCl2. Human enamel specimens containing early-stage, surface-softened (A-lesions) or more advanced, subsurface (B-lesions) caries lesions were placed into the buccal flanges of participants’ modified partial denture (one of each lesion type per side). A-lesions were removed after 14 days of twice-daily treatment use; B-lesions were removed after a further 14 days. A-lesions were analysed for surface microhardness recovery. Both lesion types were analysed by transverse microradiography and for enamel fluoride uptake, with B-lesions additionally analysed by quantitative light-induced fluorescence. Comparison was carried out using an analysis of covariance model. ResultsStatistically significant differences between 1150 ppm F and the placebo toothpastes (p < 0.05) were shown for all measures, validating the model. No differences between fluoride toothpastes were observed for any measure with little evidence of a dose-response for phytate. Study treatments were generally well-tolerated. ConclusionsResults suggest phytate has little impact on fluoride’s ability to promote early-stage lesion remineralisation or prevent more advanced lesion demineralisation in this in situ caries model. Similarly, results suggest zinc ions do not impair fluoride efficacy. Clinical significanceToothpastes may contain therapeutic or cosmetic agents that could interfere with fluoride’s caries prevention efficacy. The present in situ caries study has demonstrated that phytate, added to provide enhanced extrinsic stain removal/prevention, and zinc, added to inhibit malodour, do not impair fluoride efficacy.

Outcome of immediate implant placement with bone augmentation in the anterior maxillary supporting partial denture

Background: Immediate implantation was suggested to reduce the number of surgical interventions and to preserve the alveolar ridge. Implant placement demands a thorough understanding of anatomic, biologic, surgical, and prosthetic principles. Purpose: The aim of the present study was to evaluate the 18 months survival rate of osseointegration, on the basis of clinical and radiographic examinations, for simultaneous bone grafting with immediate implants supporting partial denture with locator attachment in the maxillary esthetic area. Materials and Methods: A total of twenty patients randomly assigned received 45 immediate implants with bone graft supporting maxillary partial overdentures. The clinical analysis of probing depth, bleeding index, plaque index, and radiographic analysis of crestal bone level at a follow-up interval of 6, 12, and 18 months was evaluated. Results: All implants achieved successful osseointegration. The soft tissue architecture remained stable throughout the healing period of the implants as well as after final prostheses delivery, contributing to esthetically pleasing and biologically sound results. Conclusions: Immediate implants with locator attachment supporting maxillary partial denture can be safe, reliable, and a predictable option for the replacement of teeth in the anterior maxillary zone, providing stability to the peri-implant soft tissue.

Fabrication of Hollow Bulb Obturator with Maxillary Partial Denture for Congenital Cleft Palate Defect

Rehabilitation of congenital cleft palate defect improves the quality of life for the patient as normal as possible. Obturator size depends on defect’s size and volume. The prosthesis should be easy to handle, simple to maintain, biocompatible, light in weight and conventional for future adjustments. This case report describes a cleft palate patient, which was rehabi­ litated with a hollow bulb obturator.

일부 노인의 구강내 상태와 자가인지 구강건강상태와의 관련성

Purpose: The recent proliferation of the aging population, oral health care is closely related to the mental health ofthe elderly is very important being recognized. Provide basic data for improving the quality of life for the elderly, todetermine whether the oral health of the elderly whether oral self-perception of health and any related wish.Methods: Surveys to May 20 from April 15, 2011, subjects were elderly and living in Daejeon and Chungnam277 people were examined. All the statistics using SPSS 18.0 for the determination of statistical significance, andthe significance level was 0.05.Results: 1. Recognized, the most common oral health, self-aware bad the state (46.2%) there was no significantdifference in the general characteristics according to self-Oral health status, remaining natural dimensions or theintra-oral prosthetic, there was no significant difference. More teeth, residual phase, in accordance with intra-oralprosthetic mandibular Not all dentures, partial dentures, full dentures net self-perception of oral health status betterrecognized.2. According to the type of partial dentures, oral health status self-phase, mixed mandibular removable, fixed,fixed, removable partial dentures in order to recognize that good oral health, self-aware state, showed between them,there was no significant difference.3. Of variable dimension that has nothing to do with the remaining natural maxillary and mandibular prostheticmaxillary prosthetic mandibular partial dentures, age income, a positive correlation was negatively correlated. Thecase of the mandible, the mandibular prosthetic mandibular partial denture, maxillary prosthetic, the amount ofincome were correlated.4. Intra-oral Prosthetics correlation variables in the maxillary, mandibular prosthesis, the positive correlationbetween income, age was negatively correlated, if the income of the mandible. Maxillary partial denture has nothingto do with the variable portion of the mandibular denture, age was a negative correlation was found.Conclusion: Satisfaction and how now it is important simply to live as long, but you need to pay attention to the

Comparison between Acetal Resin and Cobalt-chromium Removable Partial Denture Clasps: Effect on Abutment Teeth Supporting Structures

ABSTRACTStatement of problemAcetal resin has been introduced as an esthetic partial denture clasp material. However, the effects of these clasps on the abutment teeth supporting structures were not clear.PurposeTo evaluate the effects of acetal resin clasps on the abutment teeth supporting structures as compared to cobalt-chromium clasps.Materials and methodsTwenty patients, 12 males and 8 females, with Kennedy class III modification I partially edentulous maxilla and dentulous mandibles were selected for this study. Patients were divided into two equal groups; group 1 received maxillary cobalt-chromium partial denture frameworks with acetal resin Akers clasps. Group 2 received maxillary partial denture with cobalt-chromium frameworks and Akers cobalt-chromium clasps. Crevicular fluid, epithelial attachment loss, and bone height and density of the abutment teeth were evaluated at partial denture insertion and after 6 and 12 months. Paired t-test was used at p ≤ 0.05 to assess the changes in the above parameters in each group. Student t-test was used to compare between the two groups.ResultsCrevicular fluid measurements were significantly higher in the first group than that in the second group. There were no differences in epithelial attachment loss between the two groups. There were significantly higher reductions in the bone height and in the bone density in the second group than that in the first group.ConclusionAcetal resin clasps were superior to cobalt-chromium clasps as produced fewer reductions in bone height and in bone density around the abutment teeth inspite of produced increase in the crevicular fluid.Clinical implicationsSince there were lesser reductions in bone height and in bone density around acetal resin clasp abutments, it could be used successfully to retain partial dentures. However, meticulous oral hygiene and proper insertion and removal of partial denture with acetal resin clasps were required to decrease gingival inflammation and crevicular fluid amount.

局部床義歯粘膜面部の重合に伴う寸法変化 第ｌ報 上顎左右犬歯残存ＫｅｎｎｅｄｙＩ級ｌ類ケースについて

The dimensional changes of denture base of maxillary removable partial denture (Kennedy class I division 1) following polymerization were measured by using the three-dimensional measurement system for 4 weeks. The maxillary partial dentures processed by three kinds of denture base resin (heat-cured, pour-type, microwave-cured) were compared. All dentures shrank toward the center of the denture immediately after deflasking. These dentures showed linear shrinkage of 0.38% to 0.54% for the heat-cured, 0.23% to 0.52% for the pour-type, and 0.34% to 0.40% for the microwave-cured resins. After deflasking up to 4 weeks, the heat-cured dentures, except alveolar groove, gradually expanded; the pour-type dentures gradually expanded and reached the original model size, but the buccal flange continued to shrink toward mucosal surface of denture; the microwave-cured dentures gradually expanded.

Making a custom tray for elastomeric impression meterials without a primary cast

The custom tray is recommended for impressions in which it is desirable to establish precise borders, such as Kennedy class I maxillary partial dentures, where an accurate postpalatal seal is a requirement. The peripheries, including the postpalatal seal, can be established with a high degree of accuracy with a custom tray. A procedure is described that does not require a primary impression or a primary cast to make a custom tray for elastomeric impression materials.

In vitro fatigue fracture of an acrylic resin-based partial denture: An exploratory study

In this study the fatigue life of heat-cured acrylic resin test specimens shaped as maxillary partial dentures was examined. Ten test specimens were prepared from polymethyl methacrylate and were tested by a constant force fatigue test at 150 N immersed in +37 °C water. The fatigue-fracture surfaces of the test specimens were compared with a one-bend fracture surface of the control specimen by scanning electron microscopy. The correlation coefficient between the number of loading cycles required to cause fatigue failure in the midline section was calculated as was the concentration of residual methyl methacrylate. Results revealed that the fatigue life of the test specimens varied greatly (483 × 10 3 ± 371 × 10 3 cycles) and that the correlation between the number of loading cycles and the midline section was poor ( r −0.455). The correlation coefficient between the number of loading cycles and the concentration of residual methyl methacrylate was r 0.476 and p > 0.5. The fatigue-fracture surface of the test specimens was smoother in texture on the tension side than on the one-bend fracture surface.

Numerical modelling and non‐linear analysis of the behaviour of maxillary partial denture

The biomechanical problem of investigating the behaviour of a maxillary partial denture is treated by non‐linear finite element analyses. The finite element models developed allow the solution of an inverse problem to find material data of the palatal tissue and the computation of pressure distributions between the palatal plate of the denture and the palatal tissue as well as the determination of the forces acting on the anchoring teeth. This information is essential from the physiological point of view in order to avoid configurations causing pain to the patient and to prevent the natural teeth from becoming slack. Such analyses can serve as a basis for the computer aided design of proper palatal dentures.

Carcinoma arising in the area of median rhomboid glossitis

Routine soft-tissue examination of a 44-year-old Negro woman who consulted her dentist for a new maxillary partial denture revealed a depressed white lesion in the area of median rhomboid glossitis. Biopsy diagnosis of the area was well-differentiated squamous-cell carinoma. The relation of this lesion to median rhomboid glossitis is questioned in view of previous reports.

Variability in dentists' designs of a removable maxillary partial denture

Variability in dentists' designs of a removable maxillary partial denture