Partial Denture Research Articles

Prevalence of Dentine Hypersensitivity in Vital Abutment Teeth being prepared for Fixed Partial Dentures or Crowns

Objective: To determine the prevalence of dentine hypersensitivity during the preparation of vital abutment teeth for Fixed Partial Dentures or Crowns and its association with patient’s gender, age, and location of tooth. Study Design & Setting: This is a descriptive cross-sectional study of patients with 150 abutments of either crown or fixed partial dentures, carried out in the department of Prosthodontics at Armed Forces Institute of Dentistry (AFID) Rawalpindi from June to December 2021. Methodology: The Dentine Hypersensitivity was recorded on a VAS (Visual Analogue Scale) of 0-10 after the patient reported pain during exposure to thermal stimulus i.e. cold water from a 5cc syringe at 1cm distance during or just after the tooth preparation. Results: In this study, the prevalence of Dentine Hypersensitivity was 13.3% with a mean dentine hypersensitivity score (VAS) for cold water test (Mean ± SD) of 0.61±1.756. Independent samples t-tests were used to determine the difference in hypersensitivity between genders, two age groups, and type of tooth (anterior/ posterior). It showed significant results with p-values of 0.002, 0.002, and 0.003 respectively. Conclusion: Within the limitations of this study, it was highlighted that the preparation of vital teeth for conventional porcelain fused to metal (PFM) crown or fixed dental prosthesis results in dentine hypersensitivity in a considerable number of cases, with a higher incidence in women, younger patients, and vital anterior abutments.

Oral Health-Related Quality of Life Improvement After Treatment With Fixed and Removable Dental Prostheses.

Missing teeth negatively affect oral functions and masticatory efficiency, which in turn can reduce a person's quality of life (QoL). This study is aimed at evaluating the effect of dental prostheses on oral health-related quality of life (OHRQoL) in adults. This is an observational study to measure patients' OHRQoL using a cohort study design before and after treatment with different dental prostheses (fixed and removable). Ninety-seven patients who received dental prostheses responded to a questionnaire before dental prosthetic treatment and then after the completion of the treatment. The conduction was face-to-face or via telephone interviews. The questionnaire is divided into two parts to verify the demographic and the patient's related factors and to measure OHRQoL using the Oral Health Impact Profile-5 (OHIP-5). Descriptive statistics, inferential statistics, and multivariable analysis were conducted using Stata Statistical Software: Release 14.2 (2016; StataCorp LLC, College Station, Texas, United States) and were at a 0.05 significance level. Data were collected from the 97 patients, of which 70% were male with a mean age of 39.5 and 30% were female with a mean age of 43. The educational level showed that only 15% of the patients received a bachelor's degree and that the remaining 85% stopped at a high school general educational level. The received prosthetic treatment consisted of 23% single crowns, 29% fixed partial dentures (FPD), 20% removable partial dentures (RPD), and 28% complete dentures. Self-reported overall health indicated that 64% of the patients had very good health and 36% had good health or a lower quality of health. There was a significant difference in OHIP scores before prosthetic treatment (M=5.4, SD=0.57) and after prosthetic treatment (M=3.2, SD=0.49) with no significant difference in the reduction in OHIP scores between fixed prostheses (M=-2.8, SD=0.64) and removable prostheses (M=-1.5, SD=0.74). The amount of improvement in OHIP answers after wearing a prosthesis was significant (p<0.0001). Linear regression indicated that having a history of discomfort from general oral health improved (decreased OHIP score) by 2.2 after prosthetic dental treatment compared to participants without a history of general oral health discomfort when all other variables are held constant. Within the limitations of this study, it can be concluded that restoration of missing teeth with a dental prosthesis has an immense impact on individuals' QoL, regardless of the type of dental prosthetic restoration.

Implant and tooth-retained removable partial denture with precision attachment

Implant and tooth-retained removable partial denture with precision attachment

"Effect of removable partial denture on periodontal health"

"Effect of removable partial denture on periodontal health"

Effect Of Manufacturing Techniques On Adaptation Of Removable Partial Denture Frameworks In Mandibular Kennedy Class I cases: An In Vitro Comparative Study

Effect Of Manufacturing Techniques On Adaptation Of Removable Partial Denture Frameworks In Mandibular Kennedy Class I cases: An In Vitro Comparative Study

Association between the type of dental prosthesis and the masticatory performance of institutionalized patients: A cross-sectional study.

This cross-sectional study aimed to determine the chewing ability of 97 institutionalized older adults and its relevance to their status of dentition and type of prosthetic rehabilitation. The participants were categorized according to their dental status. The chewing ability was determined by semi-quantitative evaluation of a colour-changeable chewing gum and by recording the personal perception of the participants on a similar scale. The colorimetric means of the participants was significantly lower than the perception means. One-third of the participants had at least one jaw restored with complete dentures, while 17% were restored with tooth-supported or implant-supported fixed partial dentures. Based on the colorimetric method, edentulous participants displayed significantly lower chewing performance compared to all other groups. Additionally, participants with at least one complete denture exhibited weaker chewing function than those with natural teeth or fixed partial dentures. The age and sex of the participants had no further impact on the results. As the institutionalized elderly seem to overestimate their chewing efficiency, the colour changeable chewing gum could be used in nursing homes, as a simple method to determine their real masticatory function status and improve their dental care.

All ceramic resin bonded fixed partial dentures: What's new?

All ceramic resin bonded fixed partial dentures: What's new?

POLYAMIDE FLEXIBLE DENTURES – A BETTER OR WORSE STRATEGY

Background: Polyamide dentures have added advantages over the acrylic dentures in terms of esthetics, comfort and versatility to adapt to the undercut areas. However, the effect of flexibility of these dentures from the view of residual ridge resorption has always been obscure. The aim of this study is to compare the type of denture base with the distribution of masticatory forces by examining the changes on the alveolar mucosa in the histological picture before and after insertion of two widely used dentures. Materials and methods: A total of 20 participants were included in the study, among which 10 patients were allocated for acrylic removable partial dentures and 10 patients were allocated for polyamide flexible removable partial dentures. The patients were asked to rinse their mouth and cement spatula was used to collect the epithelial mucous cells noninvasively by scraping the crest of the residual alveolar ridge with light pressure in premolar-molar area both before insertion and 2 weeks after insertion of the removable partial dentures. The said swab was then smeared on a clean glass slide and fixed in 95% ethyl alcohol and was stained by Papanicolaou (PAP) stain. The PAP-stained smear was analyzed for the presence of keratinized cells and the number of keratinocytes was counted for both acrylic and polyamide denture groups. Results: The results show that both types of denture bases altered the alveolar mucosal keratinization but there was a significant difference in number of keratinized cells between all the three groups. Polyamide flexible partial dentures showed more ortho-keratinized epithelium, which favours better occlusal load distribution. Conclusion: The results concluded that there was decreased masticatory load on the residual alveolar ridge under polyamide denture group due to the flexibility of the denture base material compared to that of the acrylic denture group.

Non-metal framework for removable partial dentures – A 2-year follow-up clinical report

Traditional removable partial dentures (RPDs) with cobalt-chromium frameworks have been used for several decades, restoring the masticatory function. However, these frameworks have been documented as aesthetically unacceptable due to the display of metal clasps. The patients' increased demands regarding the aesthetic aspects of rehabilitation treatment led to the introduction of new, more aesthetic materials in clinical practice. One of the main materials is polyetheretherketone (PEEK). This clinical report presents PEEK as an alternative material for fabricating RPD frameworks for a Class III Kennedy partial edentulous mandible. The framework was constructed using CAD/CAM manufacturing, and the process combined laboratory scanning, digital framework design, resin try-in milling, and PEEK framework milling. The framework showed good adaptation to the abutment teeth and surrounding tissues. The patient was followed for 2 years without complaints and was grateful for the aesthetics. During this period, there were no signs of degradation in the framework, and the clasps were still as retentive as they were at the initial appointment, with only some pigmentation of the structure being observed.

THE ROLE OF ALTERED CAST IMPRESSION TECHNIQUE IN ACHIEVING ACCURATE PROSTHETIC FIT: A CASE REPORT

In dental practice, posterior bilateral edentulous spaces are most commonly encountered situations. Removable prosthesis generally is tooth or tissue borne or in combination. But the distal extension cases obtain their support from both the teeth and tissue adjacent to ensure equal distribution of forces on the teeth and the soft tissue. In this case report altered cast technique for fabrication of removable partial dentures has been described in detail. It is best alternative for impression making especially in distal extension cases for its better tissue adaptability, better support, uniform stress distribution, and stability of the prosthesis. Thus, increases patient comfort and function.

The Effects of the Expansion of Dental Care Coverage for the Elderly.

Expanding dental care coverage for the elderly is globally recommended but not widely implemented due to its high costs and intangible benefits. This study examined the impact of such an expansion in Korea using the imputation-based method proposed by Borusyak et al. We analyzed data from the Korea National Health and Nutrition Examination Survey (2007-2019) on dental service utilization and chewing ability among older adults. The policy resulted in a 13.5% increase in partial denture use and a 60.5% increase in dental implants among those aged 65 and above. These changes corresponded with reductions in severe chewing difficulty by 23.3% and 13.0%, respectively. No significant changes were observed in full denture use. The price elasticity of demand for partial dentures and dental implants was estimated to be -0.19 and -0.86, respectively. These findings underscore the critical role of affordability in enhancing the utilization of dental implants among the elderly and highlight the importance of appropriately expanding dental insurance coverage to improve oral health outcomes in this population.

Incorporating an artificially synthesized fluoride complex into urethane-acrylate-based 3D printing resin: Effects on mechanical properties, cytotoxicity, antimicrobial actions, and its long-term fluoride-releasing properties

ObjectivesTo synthesize a 3D printing resin with antibacterial and long-term fluoride-releasing properties. Methods(4,4-Bis-4-[2‑hydroxy-3-(2-methacryloyloxy)propoxy]-phenyl-pentanol-amine)-N,N-diacetic acid zirconium (IV) fluoride complex was synthesized from 4,4-bis-(4-hydroxyphenyl)-pentanoic acid and monitored using proton nuclear magnetic resonance spectroscopy. The synthesized complex was incorporated into a urethane-acrylate-based (UA) resin at 5 wt% and 10 wt% (5F-UA and 10F-UA groups, respectively). The UA resin without the synthesized complex was considered as the control group. All groups were 3D printed using a DLP printer, followed by 10 min of washing and 20 min of curing. Surface characteristics were observed using scanning electron microscopy. The mechanical properties were assessed by measuring its flexural strength and Vickers hardness. The antibacterial property was investigated with direct and indirect contact tests and a WST-8 metabolic activity assay. The suspension was fully mixed and diluted for counting the number of colony-forming units. The cell viability test was performed using a cell proliferation assay. The amount of fluoride released was measured daily for 28 days using ion chromatography. One-way analysis of variance was performed for statistical analyses using SPSS software. ResultsThe amount of fluoride released increased with the concentration of fluoride complex in the resin. The fluoride ions were constantly released at a low concentration from the 3D printed specimens (5F-UA: around 0.13 ppm daily; 10F-UA: around 0.22 ppm daily). The antibacterial efficacy was acceptable in both the 5F-UA and 10F-UA groups, and higher in the latter. No cytotoxicity of the resin was detected. The mechanical properties were significantly influenced by the addition of the fluoride-releasing complex. ConclusionsThe present 3D printing UA resin incorporating a fluoride complex effectively inhibited the growth of S. mutans and demonstrated the ability to slowly release fluoride over an extended period of time. Clinical significanceThis study provided informative composition of a fluoride-releasing UA-based 3D printing resin, ideal for dental applications such as crowns, bridges, removable partial dentures, and orthodontic appliances, which can benefit from sustained fluoride release and antimicrobial properties. Further modifications to the resin composition can be easily achieved to enhance the resin qualities.

Insertion axis in removable prosthesis: a preliminary report.

Removable partial denture (RPD) is still a widely used prosthesis today to solve non-implant cases, despite its aesthetic contraindications. The aim of the following work is to evaluate how much the communication and explanation to the patient of the insertion axis of the removable partial prosthesis in the periodontium and teeth has an impact on his degree of acceptance of the aesthetic limits of this prosthesis. For this study, 150 patients were examined from 10 dentists, 5 in Lombardy and 5 in Sicily, using inclusion criteria and exclusion criteria. All selected patients required removable partial dentures. The data was obtained by completing 2 questionnaires, at three different times, at prosthesis delivery, at 6 and 12 months. Questionnaires highlighted overlapping data in the two regions and a total absence of communication of the insertion axis by the dental technician laboratories was highlighted with a percentage of 100%. 28% of the patients complained of pain during the insertion of the prosthesis at 12 months and 39.33% of patients had mobility of remaining teeth with clasps at 12 months. All patients experienced no discomfort, and no important data were reported at the first 6-month follow-up. For mobile partial dentures, respecting the insertion axis can improve the predictability of the periodontal tissue and the resistance of the remaining teeth with clasps. The drawing of an arrow in the model shows the insertion axis of the prosthesis. It would be desirable to include information regarding the insertion axis and advice for the management of the removable partial denture in the first days of use in the declaration of conformity given to the doctor and to thepatient, in the indications section. It can be said that correct insertion of the removable partial denture, helped by verbal and written instructions from the doctor, can reduce possible periodontal alterations of the remaining teeth, by eliminating spurious stresses during insertion and removal of the prosthesis.

Enhancing Removable Partial Dentures Hygiene: Investigating Mucolytic Agents and Biocides for Disrupting Biofilms and Improving Antimicrobial Efficacy.

This study evaluates the antibiofilm action of 2.5 mg/mL peracetic acid (PA), 0.5 mg/mL cetylpyridinium chloride (CPC), and 160 mg/mL N-Acetylcysteine (NAC) against multispecies biofilm of Streptococcus mutans, Staphylococcus aureus, Candida albicans, and Candida glabrata, developed on surfaces of heat-polymerizing acrylic resin (AR) and cobaltchromium (Co-Cr) alloy. A multispecies biofilm was grown on the surface of AR and Co-Cr specimens (Ø 12×3mm). After biofilm maturation, the specimens were immersed in experimental solutions and evaluated through biofilm viability (CFU) (n&#61;9), biofilm metabolic activity (XTT) (n&#61;9), biofilm-covered areas (Live/Dead) (n&#61;2), effects on the extracellular polymeric substance (EPS) (n&#61;2) and biofilm morphology (n&#61;1). Data were analyzed by ANOVA and the Tukey post-test or Kruskal-Wallis followed by the Dunn post-test (α&#61;.05). Overall, all evaluated solutions impacted biofilm viability. PA presented wider activity by reducing CFU of all microorganisms on both surfaces, XTT (P<.001) and Live/Dead (P<.001). NAC had a notorious effect in reducing the viability of bacteria without affecting the yeasts. NAC reduced XTT on AR (P&#61;.006) and Co-Cr (P&#61;.003) but did not reduce the aggregated biofilm layer. CPC had distinct effect according to the surface, being most effective in reducing CFU on AR than the Co-Cr surface. However, it did not influence XTT, and the amount of residual aggregated biofilm. PA provided the greatest antibiofilm action, while CPC and NAC showed intermediate action. Nonetheless, no solution was able to completely remove the biofilm adhered to the surfaces of heat-polymerizing AR and Co-Cr alloy.

Biomechanical behaviour of tilted abutment after fixed partial denture restoration of CAD/CAM materials

BackgroundFailure to restore missing teeth in time can easily lead to the mesial tilting of the distal abutment teeth. However, a fixed partial denture (FPD) can improve stress conduction and distribution and prevent periodontal injuries. In these more complex cases, it is necessary to consider various factors comprehensively to improve conventional treatment planning and achieve better results.MethodsWe selected a patient with a missing first molar and a mesial inclination of the second molar, leaving inadequate space or bone mass for implant denture restoration, necessitating an FPD for restoration. Three-dimensional finite element analysis (3D-FEA) combined with photoelastic analysis were used to explore how the inclination angle (0 ‒ 30°) and different dental restoration materials (zirconia, lithium disilicate, polymer-infiltrated ceramic network, and resin composite) affect the biomechanical behaviour of FPD‒abutments‒periodontal tissue complex.ResultsThe stress was easily concentrated in the FPD connectors, enamel shoulder collar, periapical area, and root bifurcation. The stress on FPD and the periodontal ligament (PDL) of the second premolar increased with an increase in the elastic modulus of FPD, with an opposite trend in the abutments, the alveolar bone, and the PDL of the second molar. The stress on the FPD and alveolar bone increased with increased inclination angle of the distal abutment. The stress on two abutments and their PDL were positively correlated with the inclination angle in two stages; however, when the inclination angle > 12°, the second premolar and its PDL showed a negative correlation.ConclusionsFPDs can be used for restoration within 24° of distal abutment inclination, but protecting the abutments (< 12° especially) and the periodontal tissue (> 12° especially) must be taken seriously. For this purpose, an FPD material with higher strength is recommended.

Craniosacral Breathing in a Removable Partial Denture: A Novel Approach to Building a Denture

Craniosacral Breathing in a Removable Partial Denture: A Novel Approach to Building a Denture

Template‐aided and freehand guiding plane preparation for removable partial dentures: A randomized controlled trial

Template‐aided and freehand guiding plane preparation for removable partial dentures: A randomized controlled trial

Complete dental rehabilitation utilizing removable partial dentures and monolithic zirconia crowns (case report)

Complete dental rehabilitation utilizing removable partial dentures and monolithic zirconia crowns (case report)

Monolithic zirconia crowns and fixed partial denture in anterior and posterior regions as a prosthetic solutions (case report)

Monolithic zirconia crowns and fixed partial denture in anterior and posterior regions as a prosthetic solutions (case report)

Analysis of Dental Prosthetic Treatment in Patients with Cancer Aged 65 Years and Older after Expanded Health Insurance Coverage: A Retrospective Clinical Study.

Background and Objectives: With increases in cancer incidence and the number of cancer survivors, the demand for cancer management is growing. However, studies on dental prosthetic treatment for patients with cancer are rare. We aim to investigate the dental prosthetic treatment in patients with cancer aged ≥65 years after expanded health insurance coverage. Materials and Methods: This retrospective study included patients who were treated with implants and removable dentures at Ulsan University Hospital in South Korea between June 2015 and June 2023. Data on age, sex, cancer location, comorbid systemic diseases, number of remaining teeth, dental prosthetic treatment history, type of dental prosthetic treatment, and insurance coverage status were extracted from patient medical records and panoramic radiographs. The influence of multiple variables on dental prosthetic treatment was analyzed using the Chi-square and Fisher's exact tests. Results: The study included 61 patients with cancer (32 men, 29 women; average age: 70.9 years). Among them, 56 (91.8%) had insurance coverage benefits, and 34 (55.7%) received treatments such as implants, removable partial dentures, or complete dentures for the first time. Treatment types included 37 (60.7%) cases of implant prostheses and 24 (39.3%) conventional removable dentures. No statistical differences were observed in the type of dental prosthetic treatment according to sex, age, cancer location, number of systemic diseases, and dental prosthetic treatment history (p > 0.05). Patients with <10 remaining teeth received treatment with conventional removable dentures, which was statistically significant (p < 0.001). Conclusions: Of the 61 patients, 56 (91.8%) received insurance benefits, and 34 (55.7%) underwent dental prosthetic treatment for the first time. Within the limitations of this retrospective study, the expanded health insurance coverage alleviated the unmet demand for dental prosthetic treatment. As cancer prevalence continues to increase, expanding customized health insurance coverage is crucial to meet this demand.