Maxillary Complete Denture Research Articles

Maxillary intaglio surface of CNC milled versus 3D printed complete denture bases – an in vitro investigation of the accuracy of seven systems.

The accuracy of the intaglio surface of maxillary complete dentures produced with a variety of digital manufacturing systems have been comprehensively investigated, however, not for multiple systems in the same study. This in vitro study endeavors to measure and compare the accuracy of the intaglio surface of maxillary complete denture bases constructed with different photopolymerization-based 3D printing and CNC milling systems. Two subtractive manufacturing machines and five additive manufacturing machines were used to manufacture a maxillary denture bases (n=10) for analysis. The samples were stored in artificial saliva at 37°C for 7 days to mimic intraoral use before they were air dried for 5 min, and then scanned with an E3 dental laboratory scanner to generate STL files. A 3D metrology software program was used to analyze the data against the original CAD design. Statistical differences were determined with 1-way analysis of variance (ANOVA) and the Kruskal Wallis test (α=.05). Color deviation heat maps were used to interpret areas of clinical significance. The results indicated that the subtractive manufacturing method delivers the truest and most precise intaglio surface of maxillary complete denture bases. The additive manufacturing technique delivers less true and less precise results with inconsistency observed between the different systems as opposed to the subtractive manufacturing groups which showed no significant differences. When manufacturing a complete maxillary denture base subtractive manufacturing will deliver the most consistent and true results.

Magnetic Attachment For Tooth Supported Mandibular Overdenture: A Case Report

The goal of preventive prosthodontics is to highlight the significance of any surgery that can postpone or completely prevent future prosthodontic issues. In terms of preventive prosthodontics, the overdenture is a therapeutic option that is supported by science. Overdentures have been fitted with a variety of attachments to improve retention. Because rare earth magnets like Sm-Co and Nd-Fe-B may be produced in small sizes as retentive devices for complete dentures, detachable partial dentures, obturators, and maxillofacial prosthesis, their application for increasing retention has been widely used in the field of prosthodontics. This article presents a simple method of fabricating mandibular over denture retained by magnets in a patient whose mandibular residual ridge was severely resorbed with few remaining teeth and opposed by maxillary complete denture

An Overview of Prosthetic Implant Attachments in EdentulousPatients

Edentulism is an unresolved health care issue of sustained significance and prevalence in the aged population. Adaptation to wearing complete dentures is a complex process and must be considered from both somatic and psychological standpoints. The difficulties of wearing dentures have been attributed to deficiencies of the denture-bearing tissues, reduced salivary flow,vulnerable tissue and severe ridge resorption. The prosthetic management of the edentulous patient has always been a major challenge. Complete maxillary and mandibular dentures have been the traditional treatment option. However, most of the patients report problems adapting to the mandibular denture due to lack of comfort, retention and stability. It is well known that implantretained/supported overdentures provide improved retention, support, stability, function, and comfort for patients

Evaluation Of Dimensional Changes of Acrylic Resin Maxillary Complete Dentures Reinforced with Silica Dioxide and Zirconium Oxide Nanoparticle

Evaluation Of Dimensional Changes of Acrylic Resin Maxillary Complete Dentures Reinforced with Silica Dioxide and Zirconium Oxide Nanoparticle

CLINICAL IMPACT OF DIODE LASER ON TRUENESS, PRECISION, AND QUALITY OF LIFE OF COMPLETE DENTURE WEARERS (CLINICAL STUDY)

Background: Candida Albicans (C. albicans) is a major fungal infection affecting the majority of complete denture wearers and causes denture stomatitis (DS) which has many local treatment modalities, such as Chlorohexidine mouthwash and the Diode Laser. Their clinical impact on denture Accuracy, Retention, and the Patients ability to utilize dentures normally has not yet been discussed. Hence, a complete dentures Accuracy titled Trueness and Precision is a vital hidden key for achieving its success post-disinfection. Objectives: This studys objective was to evaluate and compare Diode Laser and Chlorhexidine mouthwashs impact on Trueness, Precision, Retention, and the Patients oral health-related quality of life (OHRQoL) in complete denture wearers. Materials and Methods:An overall of 16 complete edentulous patients were elected, dentures constructed from Heat-cure acrylic resin, and grouped equally owing to the antifungal disinfectant employed into Group I (Diode Laser) and Group II (Chlorhexidine). Assessments were carried out pre- and post-disinfectant application in both groups. The Pre-Disinfectant assessments of Trueness and Precision took place before delivery whereas, those of Retention andOHRQoLwere carried out immediately post-delivery. All the Post-Disinfectant assessments were carried out 60 days following delivery. Results: There was an insignificant difference between Diode Laser and Chlorhexidine mouthwash regarding Trueness, Precision, Retention, and OHRQoLin maxillary complete dentures. Conclusion:It has been concluded that the Diode Laser beam and the 2% Chlorhexidine mouthwash are safe antifungal Heat-cure CD disinfectants regarding Trueness, Precision, Retention, and the OHRQoL.

Evaluation of different baseplate materials on casts with various palatal vault depths

The choice of baseplate material for a trial complete maxillary denture is a critical decision in prosthodontic practice. One significant factor to consider is the depth of the palatal vault, which can influence the suitability of the baseplate material. Close adaptation of the denture base is essential in preventing lateral denture movement and enhancing denture retention and support.

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.

Position of Fovea Palatinae relative to the vibrating line in various soft palate classifications among Jordanian edentulous population

This study aims to examine the relationship between the locations of Fovea Palatinae and the posterior vibrating line in different classes of soft palate angulation (House Classification), accordingly determine its reliability as a landmark and a tool for determining the posterior limit of the maxillary complete denture. 280 completely edentulous patients with normal healthy mucosa from both genders were randomly selected. The House classification of the soft palate angulation was identified and recorded as Class I, II, or III. Phonation was used to determine the position of the vibrating line. The Fovea Palatinae was then marked. Then, the distance between the Fovea Palatinae and the vibrating line was measured and recorded. Finally, the relative position of the Fovea Palatinae to the vibrating line was recorded as being anterior, posterior, or on the vibrating line. The Chi Square test, the effect size measures (Eta and Cramer’s V tests), The Spearman’s Rho rank correlation test, and multinominal logistic regression analysis were utilized to analyse the data. House classification percentages were measured among people whose Fovea Palatinae was detectable; Class II palate was the most prevalent (47.14%), followed by Class I (43.93%), and then Class III (8.93%). Based on vibrating line position, 129 (58%) had a vibrating line anterior to Fovea Palatinae, 57 (26%) on the Fovea Palatinae, 36 (16%) posterior to Fovea Palatinae, and in 58 (21%) Fovea Palatinae were not detected. The mean distance between the vibrating line and Fovea Palatinae was 3.66 ± 1.6 mm anteriorly and 2.97 ± 1.36 mm posteriorly. No significant differences were found between males and females in regard to House classification and vibrating line position. The odds of having the fovea posterior to the vibrating line would increase by 5% for each year increase in the age (P = 0.035, odds ratio = 1.050). Class II House classification of the soft palate was found to be the most prevalent among the study participants. Also, the vibrating line was anterior to the Fovea Palatinae in the majority of cases. The odds of having the fovea posterior to the vibrating line would increase by age. The Fovea Palatinae could be considered a useful guide for locating the vibrating line.

Evaluation of open-face maxillary complete denture for patients with prominent premaxilla: a crossover study.

The establishment of good facial esthetics is one of the main objectives of complete denture construction. Unfortunately, it may be the caused issue for patients having a prominent premaxilla due to excessive lip support by the labial flange of the maxillary denture. Open-face dentures (OFD) may suggest suitable prosthetic management for these patients. However, clinical evidence regarding the efficiency of OFD is scarce. A total of 38 completely edentulous participants having prominent premaxilla and skeletal class I Angle's classification were enrolled in this study. Each participant received a mandibular complete denture and 2 opposing maxillary dentures; conventional (CD) and open-face (OFD). On the day of denture insertion, the participants were divided into 2 groups; CD-OFD and OFD-CD where CD-OFD group was instructed to use the mandibular denture and the maxillary CD for 3 months and then to use the maxillary OFD for another 3 months after a wash-out period of 2 weeks. While group OFD-CD was instructed to use the mandibular denture and the maxillary OFD for 3 months then to use the maxillary CD for another 3 months after a wash-out period of 2 weeks. The dislodging force of the maxillary dentures was evaluated using the universal testing machine and the patient perception of retention, esthetics, and comfort was evaluated using the Visual Analogue Scale (VAS). Evaluation was carried out 1 day, 1 month, and 3 months after denture insertion. The Student t-test was used to compare the 2 maxillary dentures and the intervals for each denture were compared by using the ANOVA test with repeated measures followed by a Post Hoc test (adjusted Bonferroni) for pairwise comparison. The significance of the obtained results was judged at the 5% level (P value). The dislodging force and patient perception of retention did not show significant differences between the 2 dentures, while the perception of esthetics showed significant differences throughout the follow-up period. Perception of comfort showed an insignificant difference only at the 3-month interval. Open-face maxillary dentures can be a suitable alternative for patients with prominent premaxilla to achieve satisfactory retention, aesthetics, and comfort.

Effect of Using Two Different Techniques of Denture Base Fabrication on Retention of Maxillary Complete Denture: An in Vivo Comparative Study

Effect of Using Two Different Techniques of Denture Base Fabrication on Retention of Maxillary Complete Denture: An in Vivo Comparative Study

Improving the Retention of Maxillary Complete Denture: A Case Report

Complete dentures play an essential role in restoring oral function and improving the quality of life for individuals who have missing all their normal teeth. One of the key factors determining the success of complete dentures is their retention, which refers to the ability of dentures to stay securely in place during normal oral function. Adequate retention is essential for proper speech, mastication and overall comfort of the denture wearer. The study aimed to improve the retention of complete dentures through three different approaches: spacer, posterior palatal seal area, and undercut area. Three dentures were fabricated using the same steps, with variations in certain steps based on the retention technique being employed. The study showed that all three dentures had improved retention compared to standard complete dentures. The dentures that included the posterior palatal seal area and spacer demonstrated higher retention than the denture that employed the undercut technique. It is worth noting that the patient did not find the denture with the undercut technique satisfactorily.

Appointments Needed for Complete Denture for Frail Older Adults Residing in Long-Term Care Facilities: A Cross-Sectional Study.

Frail older adults who reside in long-term care (LTC) facilities face multiple barriers in receiving dental care. In edentulous LTC patients, the fabrication of complete dentures (CDs) can present challenges, leading to an increase in procedural or post-insertion appointments. The aim of this cross-sectional study was to document the number of fabrication and post-insertion follow-up appointments for CDs in frail older adults residing in LTC facilities. Data were collected from electronic patient records (AxiUm) and the Index of Clinical Oral Disorder in Elders (CODE) software utilized by the University of British Columbia Geriatric Dentistry Program from 2002 to 2018. A total of 362 CDs were fabricated between 2002 and 2018 in 272 patients. The mean number of visits required was 4.13 and 4.32, with standard deviations (Std) of 1.45 and 1.25 needed to fabricate maxillary CDs and mandibular CDs, respectively. The mean number of follow-up visits was 1.04 for maxillary dentures and 1.09 for mandibular dentures, with an Std of 1.25 for both, similar to the results obtained for adult patients in community dental clinics. Several factors were found to be associated with an increased number of CD fabrication and follow-up visits. Pre-operative assessment of the patient's cognitive/physical status and intra-oral condition may indicate the estimated time needed to fabricate CDs.

Anti-biofilm effectiveness of protocols for cleaning complete dentures in hospitalized patients: a randomized controlled trial.

Denture biofilm acts as a potential reservoir for respiratory pathogens, considerably increasing the risk of lung infections, specifically aspiration pneumonia, mainly 48h after hospital admission. The establishment of a straightforward, affordable, and applicable hygiene protocol in a hospital environment for the effective control of denture biofilm can be particularly useful to prevent respiratory infections or reduce the course of established lung disease. To evaluate the anti-biofilm effectiveness of denture cleaning protocols in hospitalized patients. The maxillary complete dentures (MCDs) of 340 hospitalized participants were randomly cleaned once using one of the following 17 protocols (n=20): brushing with distilled water, toothpaste, or neutral liquid soap (controls); immersion in chemical solutions (1% sodium hypochlorite, alkaline peroxide, 0.12% or 2% chlorhexidine digluconate), or microwave irradiation (650 W for 3 min) combined or not with brushing. Before and after the application of the protocols, the biofilm of the intaglio surface of the MCDs was evaluated using two methods: denture biofilm coverage area (%) and microbiological quantitative cultures on blood agar and Sabouraud Dextrose Agar (CFU/mL). Data were subjected to the Wilcoxon and Kruskal-Wallis tests (α=0.05). All 17 protocols significantly reduced the percentage area of denture biofilm and microbial and fungal load (P<0.05). The highest percentage reductions in the area of denture biofilm were observed for 1% hypochlorite solution with or without brushing and for 2% chlorhexidine solution and microwave irradiation only in association with brushing (P<0.05). The greatest reductions in microbial and fungal load were found for the groups that used solutions of 2% chlorhexidine and 1% hypochlorite and microwave irradiation, regardless of the association with brushing (P<0.05). A single immersion for 10 min in 1% sodium hypochlorite, even in the absence of brushing, proved to be a straightforward, rapid, low-cost, and effective protocol for cleaning the dentures of hospitalized patients.

Incorporation of Double Salivary Reservoirs in Maxillary Denture of an Edentulous Patient with Post-mandibular Resection: A Case Report

The treatment of mandibular deviation in a completely edentulous patient (after segmental resection of the mandible) without osseous reconstruction consists of a twin-table maxillary complete denture occluding with a mandibular segmental denture at deviated position. Salivary reservoirs incorporated into the maxillary complete denture provide a potential solution to the ill effects of xerostomia, which is the most common post-irradiation complication. Hereby, the authors presents a case report of 62-yearold male patient with a unique method of incorporating two salivary reservoirs: one in the center of the palatal surface and the second beneath the additional palatal row of prosthetic teeth, with an approximate capacity of 7 mL. The novel design includes a removable silicone lid with an escape hole, allowing the patient’s tongue to control the release of the salivary substitute. It provided ease of removal of the lid, as well as cleaning and refilling of the reservoir. The design allowed area under the second row of teeth was utilised effectively without adding to the bulk of the denture.

A case report of recovering masticatory function with cleft lip and palate history: Application of a maxillary complete denture

A case report of recovering masticatory function with cleft lip and palate history: Application of a maxillary complete denture

Evaluation of retentive force between stud and resilient telescopic crown attachment for implant-retained mandibular overdentures

Purpose This study aimed to evaluate the retentive force between stud and resilient telescopic crown attachments for implant-retained mandibular overdenture. Patients and methods A total of 20 male patients were selected from the Clinic of Removable Prosthodontics Department. Faculty of Dentistry, Sinai University (Kantara). Patients were divided into two equal groups. Group I (control group): patients were treated with two implants of 3.7 mm diameter and 13 mm length (in the canine regions), retaining mandibular overdentures with ball abutments, and by conventional maxillary complete dentures. Group II: patients were treated with two implants of 3.7 mm diameter and 13 mm length (in the canine regions), retaining mandibular overdentures with conical abutments with a 6° taper, and by conventional maxillary complete dentures. Retention force was recorded at the time of insertion (T0), 6 months (T6), and 12 months (T12) later. Results One-way anova revealed significant differences between the two groups in initial retention forces (T0). However, no significant difference was observed between the two groups at T6 and T12. Group II (telescopic attachment) was associated with significantly higher retention losses than Group I (ball attachment). In comparing the mean retention loss values for the two groups at different follow-up periods, significant differences were observed for both groups. Conclusion Within the limitations of this study, it can be concluded that: telescopic attachment with taper 6° can provide acceptable retention compared to ball and socket attachment during 12 months of overdenture use.

Treatment of Distal Extension Edentulous Arches with Attachment Retained Cobalt Chromium Partial Dentures-A Case Report

Background: The awareness and demand for quality of dental treatment is relatively increasing in recent generation and more so, as far as aesthetics are concerned, along with other functions of the prosthesis. In treating partially edentulous mouth, it requires more attention, principally for esthetics, in design. While achieving the goal, the components which are incorporated in removable partial denture may result in unsightly appearance. Case Description: A 77 year old patient reported to the replacement of his missing teeth for which a conventional maxillary complete denture and cast removable partial denture with precision attachments were planned to construct. Extra coronal resilient attachment was planned to re-claim support and thereby regain of lost esthetics in the mandibular arch. Conclusion: Use of precision attachment has amplified the aspects of retention and particularly, esthetics when compared to conventional removable partial dentures.

An In Vitro Study Comparing the Impact and Flexural Strength of Leucitone 199 Denture Base Resin and Conventional Denture Base Resin Enhanced With Glass Fibre Mesh and Polyethylene Fibre Mesh.

Purpose The purpose of this in vitro study was to compare and evaluate the impact and flexural strength of conventional denture base resin reinforced with glass fiber mesh and polyethylene fiber mesh with Leucitone 199 denture base resin (Dentsply Sirona, Charlotte, USA). Leucitone is an expensive denture base material. To come up with a cheaper solution for reinforced denture base resin with superior impactand flexural strength was the goal of this study Material and methods The specimens (maxillary denture bases) were fabricated using a standard polyvinylsiloxane mold with conventional heat-cured polymethyl methacrylate resin (ISO 1567:1999). The specimens were divided into three groups (n = 10). Group I specimens, or the control group, were pre-reinforced Leucitone 199. Group II and Group IIIspecimens were reinforced with 3% by weight of glass fibers and polyethylene fibers in weave form, respectively. All the specimens were immersed in water for 1 week before testing. The impact strength was measured with a falling weight impact testing machine. One-way analysis of variance and Tukey's post hoc test were used for statistical analysis. The flexural strength was measured with the three-point bending test in a universal testing machine. Results The highest impact strength values were exhibited by the Leucitone 199 group, followed by the polyethylene fiber mesh group, followed by the glass fibers mesh group. The highest flexural strength was seen in the Leucitone 199 group, followed by the glass fiber mesh group. The least flexural strength was seen in the polyethylene fiber mesh-reinforced group. Conclusion Reinforcement of maxillary complete dentures showed a significant increase in impact strength and flexural strength, but not in comparison to pre-reinforced Leucitone 199 dentures. By using pre-impregnated glass and polyethylene fibers in woven form (prepregs), the impact strength of the denture bases can be increased effectively.

Photoelastic Stress in Mandibular Overdenture Retained by Two Implants

Objectives: The aim of this study was to verify the effect of occlusal and axial single loads in the photoelastic stress in overdenture retained by two implants placed in the anterior region of the mandible. Materials and Methods: Occlusal load (10, 20, and 30 kgf) was exerted by the conventional maxillary complete denture in occlusion with the overdenture adapted in the mandibular photoelastic model. Axial single load was also exerted on the first left or right molar of the overdenture. Qualitative analysis was made in polariscope images and quantitative analysis by the FRINGES program. Results: Qualitative analysis: The occlusal load showed similar stress in the region between the two implants. Axial single load induced in the first molars promoted stress in the implant apexes, and between the implant and mandible posterior region for the three loads. Quantitative analysis for occlusal load: 10 kgf (T = 265.03; N = 0.57); 20 kgf (T = 989.81; N = 2.11); 30 kgf (T = 1055.40; N = 2.26). Axial single load in the left molar: 10 kgf (T = 267.38; N = 0.57); 20 kgf (T = 270.07; N = 0.58) and 30 kgf (T = 281.84; N = 0.60). Axial single load in the right molar: 10 kgf (T = 952.14; N = 2.03); 20 kgf (T = 1038.58; N = 2.22); and 30 kgf (T = 926.92; N = 1.98). Conclusions: Different photoelastic stress levels occurred in the overdenture retained by two implants when submitted to occlusal or axial single load in the first left or right molar. Clinical Relevance: Artificial teeth intercuspation in the overdenture supported by two implants must have the same importance given to the vertical relationship to relieve the chewing effort.