Use Of Dentures Research Articles

The Relationship of Oral Health with Progression of Physical Frailty among Older Adults: A Longitudinal Study Composed of Two Cohorts of Older Adults from the United Kingdom and United States.

To investigate the prospective associations between oral health and progression of physical frailty in older adults. Prospective analysis. Data are from the British Regional Heart Study (BRHS) comprising 2137 men aged 71 to 92years from 24 British towns and the Health, Aging, and Body Composition (HABC) Study of 3075 men and women aged 70 to 79years. Oral health markers included denture use, tooth count, periodontal disease, self-rated oral health, dry mouth, and perceived difficulty eating. Physical frailty progression after ∼8years follow-up was determined based on 2 scoring tools: the Fried frailty phenotype (for physical frailty) and the Gill index (for severe frailty). Logistic regression models were conducted to examine the associations between oral health markers and progression to frailty and severe frailty, adjusted for sociodemographic, behavioral, and health-related factors. After full adjustment, progression to frailty was associated with dentition [per each additional tooth, odds ratio (OR) 0.97; 95% CI: 0.95-1.00], <21 teeth with (OR 1.74; 95% CI: 1.02-2.96) or without denture use (OR 2.45; 95% CI 1.15-5.21), and symptoms of dry mouth (OR ≥1.8; 95% CI ≥ 1.06-3.10) in the BRHS cohort. In the HABC Study, progression to frailty was associated with dry mouth (OR 2.62; 95% CI 1.05-6.55), self-reported difficulty eating (OR 2.12; 95% CI 1.28-3.50) and ≥2 cumulative oral health problems (OR 2.29; 95% CI 1.17-4.50). Progression to severe frailty was associated with edentulism (OR 4.44; 95% CI 1.39-14.15) and <21 teeth without dentures after full adjustment. These findings indicate that oral health problems, particularly tooth loss and dry mouth, in older adults are associated with progression to frailty in later life. Additional research is needed to determine if interventions aimed at maintaining (or improving) oral health can contribute to reducing the risk, and worsening, of physical frailty in older adults.

Differences in Nutritional Status of Elderly Users and Non Users of Complete Dentures

Background: Dental and oral health problems due to tooth loss will have an impact on nutritional intake and nutritional status of the elderly.The elderly who do not replace missing teeth using dentures will decrease their chewing efficiency. One of the functions of dentures is to restore the function of mastication and speech. Objective: Knowing the difference in nutritional status of elderly users and non-denture users in terms of body mass index using a literature review. Method: Literature review Searching for articles using four Science Direct, Google Scholar, EBSCO, and PubMed database using relevant keywords and obtained 12 article results that match the research criteria. Results: Normal nutritional status is greater in elderly users of complete dentures compared to elderly who do not use complete dentures. based on measurements of body mass index, denture users and non-users have a significant difference. Conclusion: The use of complete dentures can affect nutritional status.

LEVEL OF KNOWLEDGE AND MOTIVATION ON THEUSE DENTURES BY PEOPLE WHO LOSE TEETH IN PUSAKA RAKYAT VILLAGE BEKASI

Background: Tooth loss is condition in which a tooth falls out of the socket or out of place. Missing teeth that aren’t replaced immediately can interfere with mastication, and Temporomandibular Joint (TMJ) disorder. Using dentures is one of the right ways to deal with missing teeth, but not everyone wants to replace missing teeth with dentures. Low use of dentures is influenced by level of knowledge and motivation of individuals in meeting denture needs. Several factors that influence level of knowledge and motivation are age, gender, education level, occupation, and income. Purpose: To determine level of knowledge and motivation toward use of dentures by people who have lost their teeth in Pusaka Rakyat Village, Tarumajaya District, Bekasi Regency. Method: Quantitative descriptive with sample 100 people, has criteria including people in Pusaka Rakyat Village who are 20 years old, have lost at least one tooth element, and never used dentures. Data collection was carried out in February-April 2021 by filling questionnaires by respondents. Result: Chi-Square test with significance p-value&lt;0.05 found significant relationship between age and level of knowledge and occupation with motivation to use dentures. Conclusion: Age and occupation are very influential on a person's motivation and motivation is very influential on a person's income, so they will be more aware about dentures.

Protective periodontitis: the possibility of prevention

Relevance. The isolation of prosthetic periodontitis among inflammatory periodontal pathology has significantly supplemented the generally accepted notions of dentists concerning the etiology and progression of dental prosthetics complications. Improving the methods of preventing inflammatory periodontal lesions caused by the presence of denture structures in the oral cavity is very relevant nowadays, especially in persons using removable dental prostheses. This applies to older age groups, which for financial reasons are more accessible removable acrylic dentures, which they have the opportunity to get at the expense of the budget of the region.Aim. This applies to those in the older age groups who, for financial reasons, have more access to removable acrylic dentures because of the possibility of obtaining dentures at the expense of the regional budget. Therefore, the aim of the study was to assess the possibility of using a new domestic denture fixation cream for the prevention of prosthetic periodontitis in patients using removable dentures.Materials and methods. 63 (18 male and 45 female) elderly patients (61-74 years old) with partial tooth loss on both jaws were examined. Partial removable acrylic dentures were made for patients 1st group (n = 30) and 2nd group (n = 33). The patients of the second group constantly used the domestic ASEPTA РARODONTAL denture fixation cream with herbal extract for 9 months of the study. Assessment of the impact of dentures on the oral tissues and periodontium was carried out on the basis of clinical examination and by studying the antimicrobial potential of saliva.Results. The use of partial removable acrylic dentures has been found to contribute to the occurrence of prosthetic periodontitis, which is associated with the technology used in their manufacture. It is possible to reduce the incidence of prosthetic periodontitis not only by timely correction of prosthesis but also by using adhesive means for fixation of prosthesis, the application of which permitted to reduce the occurrence of prosthetic periodontitis by 47,58% and to reduce the occurrence of inflammatory changes of gingiva in the restored teeth area by 16,06%. The research of the antimicrobial potential of saliva in persons who constantly used ASEPTA РARODONTAL denture fixation cream with herbal extract showed that the immune balance achieved before dental prosthetics can be maintained in the oral cavity.Conclusion. The results of the clinical and laboratory study allow us to recommend more widely the use of adhesive means for fixation of removable dentures, including the ASEPTA PARODONTAL cream with herbal extracts.

The association between poor oral health and risk of breast cancer in the UK Biobank.

Specific oral health conditions may be risk factors for breast cancer. This study aimed to investigate the associations of oral health conditions with breast cancer risk. A total of 234,363 women from the UK Biobank prospective cohort were included in this study. We examined the association of self-reported painful/bleeding gums, loose teeth, mouth ulcers, toothache, and use of dentures with the risk of breast cancer. Hazard ratios (HRs) and 95% confidence intervals (95% CIs) for the associations were calculated with adjustment for multiple confounders. No associations of self-reported painful/bleeding gums (HR = 1.04, 95% CI 0.98-1.10), loose teeth (HR = 0.92, 95% CI 0.82-1.02), mouth ulcers (HR = 0.99, 95% CI 0.93-1.06), toothache (HR = 1.03, 95% CI 0.92-1.14), or denture use (HR = 0.96, 95% CI 0.91-1.02) with breast cancer risk were found. No statistical heterogeneity was observed in analyses stratified by baseline smoking and menopausal status. We observed no association between self-reported oral health conditions with the risk of breast cancer. Additional research with clinical examinations or oral health biomarkers in diverse populations is warranted.

Evaluation of the relationship between GOHAI, MNA and the dental hygiene of using denture wearers for older patients.

The use of removable dentures increase due to tooth loss that occurs with ageing. The relationship between age, use of removable dentures and nutrition is important. To evaluate the effectiveness of the GOHAI, the MNA, and the dental hygiene of older patients using dental prostheses. This was a cross-sectional study of people over 65 who used removable prostheses in at least one jaw (partial or complete denture) for a minimum of 6months (n = 120). The data were collected using questionnaires of a qualified examiner and oral clinical tests with interviewers in person. The subjects' nutritional status was assessed by a Turkish version of the mini nutritional assessment (MNA). GOHAI questionnaire was used to evaluate those aspects considered to have an impact on the quality of life of the older population, such as functional limitation, aesthetic dissatisfaction, chewing discomfort, avoidance of particular food, out-of-social contacts and self-medication administered for dental pain. There was no statistically significant correlation between the GOHAI score and sociodemographic and intraoral data (p > .050). A negative correlation was found between age and MNA. A statistically significant difference was found between the MNA score's median values according to the participant's education level, type of prosthesis, and marital status (p < .050). Good was determined as the highest GOHAI category with 54%. There is a negative correlation between age and MNA. The risk of malnutrition increases with age. Since the oral condition also affects the patient's systemic condition, the team caring for geriatric patients must bring these people to the maximum level of life in a multidisciplinary manner.

Does the use of conventional complete dentures influence taste perception? A systematic review.

Although conventional complete dentures are widely used, a systematic review of their influence on wearers' taste perception is lacking. The purpose of this systematic review was to determine whether conventional complete dentures influence the taste perception of edentulous patients. This systematic review was registered in the International Prospective Register of Systematic Reviews (PROSPERO) (CRD42022341567), and the guidelines of the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) were followed. The guiding question was: "Does the use of complete dentures influence the taste perception of edentulous patients?" Two reviewers searched articles in the PubMed/MEDLINE, Scopus, Cochrane Library, and https://clinicaltrials.gov databases up to June 2022. The risk of bias in each study was assessed using the risk of bias in nonrandomized studies of interventions and the risk of bias based on the Cochrane risk of bias tool for randomized trials. The certainty of evidence was assessed using grading of recommendations, assessment, development, and evaluation (GRADE). A total of 883 articles were found with the search, and 7 were included in this review. Various changes in taste perception were identified in some of these studies. The use of conventional complete dentures can influence the perception of the 4 primary tastes (sweet, salty, sour, and bitter) of edentulous patients, which may negatively interfere with the perception of flavor.

Controlling and Stabilising Mandible During Reconstruction: Significance and Techniques.

Stable and accurate positioning of condyle in the glenoid fossa is necessary for maintaining occlusion, facial symmetry and normal function of the temporomandibular joint following segmental resection of mandible. In non-reconstructed mandibular segments or those with fractured reconstruction plates the bony defect gets altered due to contraction or inadvertent muscular pull. This paper describes various techniques used to control dentate and edentate segments of the mandible during reconstruction following an ablative procedure. Secondary mandibular reconstruction has always been a tedious task for the surgeons. Several techniques have been described in literature ranging the use of external fixators, gunning splints and dentures for stabilising mandibular segments. Use of a pre-bent and adapted reconstruction plate is a common practice but may not be feasible in malignancies, benign tumours causing expansion and secondary reconstruction. The current advances in virtual surgical planning allows mandibular reconstruction to be performed in a simpler yet predictable manner. The paper describes techniques ranging from twin K-wire placement to occlusal wafers, 3D printed splints and patient specific implants to enable accurate positioning of the segments and achieve pre-operative form. Advances in virtual surgical planning will continue to allow this field to evolve and to improve the quality of life of the patients.

A study of the impact of solid cast removable dentures with silver electroplating on the condition of patients

Abstract Objectives: The aim of our study was to determine the effectiveness and biocompatibility of the use of solid clasp dentures with silver plating in the restoration of partial defects of the dentition. Methods: The study involved 23 patients with partial secondary adontia after oral rehabilitation. At the first stage, before the start of treatment and after a month of using a clasp prosthesis, patients underwent studies of blood biochemical parameters, Schiller-Pisarev’s test and Papillary-marginal-alveolar index. At the second stage of the research, silver electroplating was applied to the metal parts of the clasp prosthesis and after a month of use, its effect on oral hygiene and blood biochemical parameters was assessed. Results: After installation of the removable prosthesis with solid structures, the PMA index after the use of silver-plated clasp prosthesis decreased to medium severity, which is explained by positive impact on the inflammatory process in the gums. We can see the stability of biochemical parameters of blood in patients with solid removable prostheses can serve as a justification for the administration of silver electroplating for prophylactic and therapeutic purposes. Conclusions: The effectiveness of the use of silver plating in the treatment of partial defects of the dentition eliminates the clinical manifestations of the pathological condition and prevents possible complications in the oral cavity.

Association of remaining tooth number with postoperative respiratory complications in heart valve surgery patients.

This study examined the association between the number of remaining teeth and the incidence of postoperative respiratory complications in patients undergoing heart valve surgery. We retrospectively enrolled 157 patients who underwent heart valve surgery between April 2010 and March 2019. Data on patient characteristics including systemic and oral conditions were extracted and postoperative respiratory complications were set as outcomes. Patients were divided into two groups according to the number of remaining teeth (≥20, <20). After adjusting for confounding factors with propensity scoring, logistic regression analysis was performed to examine the association of remaining teeth number with the incidence of postoperative respiratory complications. In addition, subgroup analysis was performed by stratifying the data into quintiles based on the propensity score. Univariate analysis showed significant differences between the two groups in factors, including age, past cardiac surgery experience, New York Heart Association functional classification class IV, denture use, tooth extraction before surgery, occlusal support, and periodontitis. Logistic regression analysis showed that patients with <20 remaining teeth had a significantly higher incidence of postoperative respiratory complications than those with ≥20 remaining teeth, with an odds ratio of 29.800 (p=0.004). Subgroup analysis showed that the odds ratio for the patients with <20 remaining teeth was 9.000 (p=0.038). The results suggest that heart valve surgery patients shall get attention on oral disease prevention by dental care practitioners to maintain a sufficient number of teeth for the prevention of postoperative respiratory complications.

Tooth loss and dementia amongst older adults residing in long-term care facilities in Vancouver: A case-control study.

The purpose of this case-control study was to determine the association between dementia and the number of missing teeth, functional occlusal units and denture use in older adults residing in Long-Term Care (LTC) facilities. Many studies have shown an association between dementia and tooth loss. However, few studies with a large sample size have been reported describing the relationship between dementia and the number of missing teeth, remaining teeth and functional occlusal units. An oral health assessment database of 2160 older adults admitted to LTC facilities in Vancouver, Canada, between 2015-2019 was utilised. Participants with a diagnosis of dementia in their medical records (N=1174) were compared to those without dementia (N=986). Multiple logistic regression analysis was used to explore a potential association between the number of missing teeth, functional occlusal units and the use of dentures and dementia. The number of remaining teeth (OR=1.0, 95% Confidence Interval=1.0-1.0; P=.054) and number of functional occlusal units (OR=1.0, 95% CI=1.0-1.0; P=.059) were not associated with dementia after adjusting for age, sex, oral self-care and systemic conditions. Denture use (OR=1.1, 95% CI=0.5-2.4; P=.790) was not associated with dementia in edentulous patients. There was no association between dementia and the number of remaining teeth, functional occlusal units or wearing dentures.

Oral health, frailty and physical activity levels: is there a link?

Introduction. Oral frailty is associated with decreased quality of life and general health in older adults.Objective: to assess the relationship between oral frailty, physical frailty and physical functioning decline.Methods: An epidemiological cross-sectional Eucalyptus study of adults aged 65 years and older (n=396). The main study parameters: oral health status, chronic diseases, a comprehensive geriatric assessment, complete blood count.Results: 75.5% (n=299) of participants had less than half teeth. 87% of them used removable/fixed dentures or implants. Despite the high frequency of denture use, 9.4% (n=37) of study participants reported difficulties in pronunciation of words and 19.2% (n=76) complained of pain/discomfort when chewing food due to oral health/teeth/dentures. After adjusting for sex, age, cognitive decline, number of remaining teeth, denture/implant use, nutritional status and stroke/TIA, heart failure, chewing or speech problems due to problems of the oral cavity associated with teeth / oral mucosa / dentures were associated with low grip strength with OR (95% CI) 2.738 (1.306–5.737) and 2.494 (1.045– 5.952) respectively and frailty with OR (95% CI) 2.513 (1.083–5.829) in the group of study participants with difficulty in pronunciation of words. The association between chewing difficulty and frailty was significant after adjusting for sex, age, cognitive decline, number of remaining teeth, denture/implant use, nutritional status, and stroke/TIA with OR (95% CI) 2.002 (1.020–3.931), but disappeared after adjusting for heart failure.Conclusion: Chewing or pronunciation difficulties due to oral health problems were associated with an increased risk of frailty, and low levels of physical functioning. All patients with frailty and low physical function should be consulted by a prosthodontist.

Evaluation of the efficacy of stomatitis prevention in prosthetics with complete dentures with additional fixation with the cream.

The objective of the study is to evaluate a microbiological efficacy of prevention and development of prosthetic stomatitis in full removable prosthetics. All patients with complete absence of the teeth on the lower jaw were divided into four groups: individuals who used full removable dentures and did not use any fixation agents and adhered to conventional oral hygiene; patients with full removable dental prostheses who used the cream "Corega" to strengthen the fixation from the first day of prosthetics and adhered to conventional oral hygiene; patients with complete removable dentures who used Corega Comfort (GSK) to strengthen the fixation from the first day of prosthetics and adhered to conventional oral hygiene; patients with complete removable dentures who used Corega Comfort (GSK) to enhance the fixation and performed antibacterial cleaning of dentures using Biotablets "Corega" for cleaning dentures from the first day of prosthetics. Microbiological and mycological examination of the patients included microscopic examination of smears using conventional and luminescent methods of staining smears from the denture surface. The data obtained show that probiotic species of microbial flora of the oral cavity are prone to colonization on the surface of complete removable acrylic dental prostheses when using fixation creams "Corega" and Corega Comfort (GSK), which is not characteristic of acrylic dentures without additional fixation. This flora much exceeds virulent one and Candida fungi quantitatively. It can be concluded that the use of complete removable dentures with the application of biotablets "Corega", can significantly (one hundred times) reduce the contamination of the dental prosthesis after 1 month of the follow-up. In general, pathogenic inoculation the application of this type of denture hygiene the makes it possible to achieve reduction of the number of streptococcal colonies by several times. Key words:Fixation gel, Candida fungi, patient, oral cavity, microbial content.

Factors Associated with Selection of Denture Adhesive Type: A Cross-Sectional Survey.

The type of denture adhesive, cream or home-liner, chosen by regular denture adhesive users and oral conditions contributing to this selection require elucidation. The factors associated with denture adhesive selection were investigated through a face-to-face survey on oral and denture conditions. Age, sex, oral moisture, masticatory performance, retention and stability of the removable denture, ridge shape, mucosal thickness, and duration of denture use were examined in cream and home-liner-type denture adhesive users who did not regularly visit a dentist. Univariate analysis and multivariate analyses were performed. There were 38 and 40 cream-type and home-liner-type adhesive users, respectively. The type of denture adhesive was significantly associated with the oral moisture value, retention, ridge shape, mucosal thickness, and duration of denture use in univariate analyses. The residual ridge conditions with large factor loadings for ridge shape and mucosal thickness and duration of denture use were significantly related to the denture adhesive selection in multivariate logistic analysis. The residual ridge conditions and duration of denture use were significant factors in the selection of cream- and home-liner-type denture adhesives. These results can provide appropriate guidance based on the adhesives patients without dental supervision are more likely to choose.

The association between denture use and cardiovascular diseases. The United States National Health and Nutrition Examination Survey 2009-2018.

Poor dental health is associated with cardiovascular diseases (CVD). However, the relationship between CVD and denture use is currently unknown. This study aimed to investigate whether denture use is associated with CVD among American adults. 10,246 non-pregnant subjects aged 30-59 years from five cycles (2009-2018) of the United States National Health and Nutrition Examination Survey (NHANES) were included in this study. Participants who were observed by a dental examiner wearing denture/partial denture/plates were defined as denture users. CVD was defined as self-reported coronary heart disease, myocardial infarction, angina pectoris, stroke, and congestive heart failure. The association between denture use and CVD was analyzed using logistic regression with adjustment for potential cofounders. 4.4% (95% CI, 3.9-5.0) participants had CVD, and 3.5% (95% CI, 2.8-4.5) participants were denture users. Denture use was associated with CVD [OR = 4.26, 95% CI (2.90-6.28), P < 0.01], which remained significant [adjusted OR = 1.82, 95% CI (1.15-2.88), P < 0.01] after adjustments for sociodemographic characteristics, smoking, alcohol use, drug addiction, body mass index (BMI), and abnormal medical conditions including gum problem, hypertension, diabetes, and hyperlipidemia. Women with dentures had significantly higher odds of CVD [adjusted OR = 2.13, 95% CI (1.10-4.11), P = 0.025]. In this nationally representative survey, denture use was associated with CVD. Denture use may be an unconventional risk factor for assessing CVD risks, especially in women. Future studies are required to investigate whether CVD and denture use is causally related.

Oral health-related quality of life of older adults living in long-term care facilities and its association with dental prosthesis use and condition

Objective: This cross-sectional study aimed to evaluate the association of oral health-related quality of life with prosthetic rehabilitation status and dental prosthesis condition in residents of Brazilian long-term care facilities. Methods: The oral health-related quality of life of older adults (n = 194; mean [standard deviation] age = 78.93 [9.10]) was assessed by the Geriatric Oral Health Assessment Index and the Oral Health Impact Profile questionnaires. Prosthetic rehabilitation status was recorded according to the absence of teeth and use of dental prostheses. Dental prosthesis condition was considered good or poor based on stability, retention, occlusion, vertical dimension, and defects. Poisson regression models were plotted to analyze the data (α = 0.05). Results:Lower Geriatric Oral Health Assessment Index scores were associated with edentulism with denture use only on one jaw (B = -0.05) and poor dental prosthesis stability (B = -0.04). Similarly, edentulous participants with denture only on one jaw (B = 0.59) and those wearing dental prostheses with poor stability (B = 0.36) are more likely to achieve higher Oral Health Impact Profile scores. Also, lower Oral Health Impact Profile scores were associated with denture defects (B = -0.34). Conclusion:In summary, the oral health-related quality of life of older adults living in longterm care facilities is negatively impacted by edentulism with denture only on one jaw and use of dental prostheses with poor stability. Therefore, long-term care facilities should provide oral health training to caregivers, include dental professionals in the staff, and articulate demands with oral health teams in the primary care system.

Effect of mandibular bilateral distal extension denture design on masticatory performance.

Removable partial dentures have a wide range of applications as missing tooth prostheses, and the denture design can be quite diverse. However, the factors affecting masticatory function remain unclear. We investigated the effect of denture design, especially the use of indirect retainers and major connectors, on masticatory function in patients with mandibular bilateral distal extension dentures. Fifty-three patients with mandibular Kennedy Class I and Eichner classification B occlusal support were included in this study. Masticatory performance (MP) was assessed using gummy jelly. For the dentures, the type of major connector (bar or apron), presence or absence of indirect retainers, number of rests, and number of artificial teeth were evaluated. The number of functional teeth and occlusal support, Eichner classification, maxillary denture usage, mandibular residual ridge height, and duration of denture use were also evaluated. The factors influencing on the MP were evaluated using the Mann-Whitney U test, Spearman's correlation coefficient, and logistic regression analysis. MP was significantly higher when the major connector was bar-type or when there was an indirect retainer than with an apron-type or no indirect retainer. MP was positively correlated with the number of functional teeth, occlusal support, and number of rests. Logistic regression analysis revealed that the number of functional teeth and the presence or absence of an indirect retainer were factors that significantly influenced the MP. An indirect retainer setting is useful for achieving good masticatory performance in mandibular bilateral distal extension dentures.

Factors related to masticatory performance in patients with removable dentures for jaw defects following oral tumor surgery.

Purpose In the treatment of oral tumors, extensive jaw defects due to surgical resection can reduce masticatory performance. Herein, we aimed to clarify the factors related to masticatory performance in patients with jaw defects.Methods In total, 76 patients (42 male and 34 female) underwent prosthetic treatment with a removable denture for a jaw defect following oral tumor surgery. Data on history of radiation therapy, period of time since surgery, period of use of the present denture, number of remaining teeth, and site of the jaw defect were collected. Masticatory performance was evaluated using test gummy jelly. In addition, maximum bite force, tongue pressure, tongue-lip motor function (oral diadochokinesis /pa/, /ta/, /ka/), and oral dryness were evaluated. Logistic regression analysis was performed with lower masticatory performance scores as the dependent variable. Since multicollinearity was suspected between the oral diadochokinesis /ta/ and /ka/ syllables, two logistic regression analyses were conducted: Model 1 with the /ta/ syllable as an explanatory variable, and Model 2 with the /ka/ syllable as an explanatory variable.Results In Model 1, a history of radiation therapy, maximum bite force, number of remaining teeth, tongue pressure, and oral diadochokinesis /ta/ were significant explanatory variables. In Model 2, a history of radiation therapy, maximum bite force, number of remaining teeth, and tongue pressure were significant explanatory variables.Conclusions A history of radiation therapy, maximum bite force, tongue pressure, number of remaining teeth, and motor function of the proglossis are related to decreased masticatory performance in patients with jaw defects.

Efeito de diferentes materiais para confecção de prótese parcial removível provisória: um estudo in vitro sobre rugosidade superficial e resistência à fratura

ABSTRACT The use of removable partial dentures is considered a common and inexpensive treatment option to rehabilitate edentulous areas. The aim of this study was to evaluate the effect of different materials for provisional removable partial dentures, an in vitro study on surface roughness and fracture resistance. Thermopolymerizable acrylic resin and thermoplastic resin specimens with dimensions of 10 x 10 x 2 mm (blocks) (n=10) and with dimensions of 65 x 20 x 3 mm (bars) (n=10 were analyzed for their surface roughness (Ra) and three-point flexural strength test. All specimens were subjected to oven aging for 60 days at 37°C±0.5°C in distilled water. The statistical analysis was performed with a significance level of 5%, and the surface roughness data were submitted to the Two-way Anova statistical test (P &lt; 0.05) and the mechanical strength data were subjected to One-way Anova statistical test (P &lt; 0.05). For roughness, the factor resin type (P = 0.000) and the factor aging (P = 0.000) were statically significant, as well as showing interaction (P = 0.228). The Thermopolymerizable acrylic resin had the lowest mean roughness values compared to the thermoplastic resin and showed no statistical difference after aging. The same scenario was repeated for flexural strength values; Thermopolymerizable acrylic resin was statistically superior to thermoplastic resin (P = 0.000). Thermopolymerized acrylic resin showed lower surface roughness values and higher flexural strength values compared to thermoplastic resin.

SINGLE IMPLANT-RETAINED MANDIBULAR OVERDENTURE: A CASE REPORT

Edentulism is a public health problem, impacting the quality of life of many people worldwide. Factors related to the mandibular ridge minimal support may hinder the common use of complete dentures. The use of overdentures supported by a minimum of one implant can be considered as reliable approach in this situation. Aim: To present a case report of a single implant-supported overdenture in the mandibular symphysis fot public health policies. Case report: A 65-year-old edentulous patient complaining of discomfort in a mandibular denture was referred to the Universidade Federal Fluminense. On clinical examination, residual mandibular ridge resorption and soft tissue trauma were observed, which was in line with the reported discomfort. A mandibular overdenture retained by a single implant in the symphysis region was planned. A hex-type 4.0 mm in diameter and 11.0 mm in length implant was placed and a new set of complete dentures were made till the date of complete osseointegration. After four months, a second surgery exposed the implant platform to fit a ball attachment with a 32 N.cm torque. The denture was relieved on its tissue surface for the placement of a metal attachment matrix with a rubber O-ring inside, using a fast-curing resin, and the patient was locked into maximum intercuspidation during the acrylic polymerization process. Excessive resin was removed and the region was polished for daily use after the process. The patient reported an improvement in chewing condition and restorative esthetics. Conclusions: A minimum requirements protocol has achieved relevant results and may be feasible in public health policies. Maintenance visits are recommended to maintain retention quality and to decrease the risk of failures.