Denture Research Articles

409. TWO-STAGE OPERATIVE PROCEDURE FOR A BENIGN, COMPLICATED TRACHEOESOPHAGEAL FISTULA CAUSED BY FOREIGN BODY IMPACTION

Abstract Background Benign Tracheoesophageal fistula (TOF) caused by foreign body impaction is a rare condition requiring technical expertise. There are choices available based on the individual patient's situation, including endoscopic management, local resection and defect closure, and, in rare cases, esophagectomy. Methods A 58-year-old male had a history of artificial tooth dislodgement that got impacted in the esophagus, resulting in dysphagia. Endoscopy showed an impacted denture with an underlying transmural esophageal perforation, closed with clips and an endoloop. Two weeks later, partially covered SEMS was placed. Failure to retrieve the SEMS after repeated attempts due to tissue ingrowths, he was referred for management. CECT showed a stent in situ with a small air-filled cavity left lateral to the tracheal bifurcation. Bronchoscopy revealed the compression of the posterior tracheal wall and the presence of an endoclip in the posterior wall of the left main bronchus (LMB). Results The patient was planned for a two-stage operation. In the first stage, esophagus was mobilized along with the stent and the fistulous tract was excised. The esophagus was divided at both ends in the thorax. Up to this part, the procedure was done with single-port VATS without CO2 and in the left semi-prone position with a bronchial blocker in the right main bronchus. The fistula with the LMB was closed with an intercostal muscle flap and a bovine pericardial patch with transient apnoea. During this part, we extended the incision in the fourth space to raise the flap. Cervical esophagostomy was matured, and a feeding jejunostomy was created. The postoperative phase was uneventful, and he was discharged on the 5th postoperative day. After 4 weeks, we did the second phase of surgery, where we made a 4 cm retrosternal gastric conduit and performed the hand-sewn anastomosis with the cervical esophagus, which was taken down from the skin. The patient had an uneventful postoperative course and was allowed to be taken orally on day five and discharged subsequently two days later. Conclusions TOF demands a multidisciplinary treatment strategy. Successful outcomes are determined by patient triage, delineation of the location and size of the defect, mediastinal contamination, and the availability of expertise.

Comparative Evaluation of the Effect of Microwave, 1% Sodium Hypochlorite, and Sodium Perborate Disinfection on the Color Stability of Two Nanoparticle-Reinforced Heat-Polymerized PMMA Denture Base Resins: An In Vitro Study.

Introduction Older adults experience significant improvement in their quality of life by using removable prosthetics to replace missing teeth. Poly(methyl methacrylate) (PMMA) has become the most popular material for denture bases due to its ease of use and affordability. Recently, scientists have started adding nanoparticles like titanium dioxide (TiO2) and zirconium oxide (ZrO2) to PMMA to enhance its physical properties. These resins with nanoparticles need to stay the same color after being disinfected in different ways if they are going to be used for a long time. So, the purpose of this investigation was to assess whether or not there exists any difference between two kinds of thermally cured acrylic resin for artificial tooth bases strengthened with nanoparticles when subjected to various chemical sterilizers alongside microwave irradiation, as well as determine their comparative colorfastness levels. Materials and methods In this lab experiment, we tested how well 5% TiO2 and 7% ZrO2 nanoparticle-reinforced PMMA resins held their color when exposed to microwave irradiation, 1% sodium hypochlorite, or sodium perborate disinfection. We made 120 specimens shaped like discs; half were treated using one method, while the other half were treated using a different method. Color was measured at baseline (T0), after one cycle (T1), after five cycles (T2), and after six months (T3) using a reflectance spectrophotometer, which calculates the color difference (∆E). Results All three methods of disinfection caused significant color changes (p<0.001); however, sodium perborate caused the least amount of change, followed by 1% sodium hypochlorite and microwave irradiation. The mean ∆E values showed that after one day, there was a change in color by 1.1 due to microwave disinfection, which increased to 5.7 after five days; on the other hand, for 1% sodium hypochlorite, the change was recorded as 0.7 after one month and 1.6 after three months and finally reached up to 2.6 after six months, while sodium perborate showed the least amount of change, with ∆E values recorded as 0.2 after one month, 0.5 after three months, and 0.8 after six months. Conclusion Sodium perborate proved to be the most effective disinfectant for maintaining color stability in 5% TiO2 and 7% ZrO2 nanoparticle-reinforced PMMA resins, thus making it ideal for routine disinfection. Therefore, according to this study, sodium perborate should be used as a disinfection method because it results in minimal color change in nanoparticle-reinforced PMMA dentures.

Diet-related diseases mediate the effect of masticatory function on premature death in older adults.

Although poor oral health has been a potentially modifiable risk for mortality, the precise association between functional tooth units (FTUs) and premature death as well as the underlying mechanisms remains unclear. This study used data from the National Health and Nutrition Examination Survey (NHANES) 2009-2018. Mortality details were obtained from the National Death Index (NDI). The number of FTUs was defined as pairs of opposing natural and artificial teeth in the premolar and molar area. Weighted logistic regression models were employed to assess the relationship between FTU and premature death. Demographic characteristics, lifestyle habits, and disease histories were adjusted as confounding factors. The propensity score matching (PSM) was conducted to further assess the association between FTU and premature death. Mediation analyses were conducted to assess the role of diet-related diseases in the association between FTU and premature death. The analysis included 4169 individuals aged between 60 and 74 years. Participants with 0 ≤ FTUs ≤ 3 had a significantly higher odds of premature death compared to the 10 ≤ FTUs ≤ 12 group (OR = 2.142, 95% CI 1.091-4.208). After missing data imputation, 0 ≤ FTUs ≤ 3 was still significantly associated with increased odds of premature death (OR = 2.115, 95% CI 1.125-3.975). The relationship between 0 ≤ FTUs ≤ 3 and reference group persisted (OR = 2.196, 95% CI 1.296-3.721) after PSM analyses. For mechanism, mediation analysis showed that diet-related diseases, including diabetes and hypertension, partially mediated the association between FTU and premature death with proportions of 5.089% and 8.437%, respectively. The findings revealed a link between impairment of masticatory function and a heightened odds of premature death among older adults. Notably, 0 ≤ FTUs ≤ 3 is significantly correlated to premature death among this demographic, with diabetes and hypertension partially mediating the effect of FTU on premature death. Further longitudinal studies are required to validate the findings.

Development of a correction coefficient for radiographic evaluation of the alveolar bone crest: a pilot study.

To analyze the differences in cusp height on radiographs, establishing proportional relationships between cusp and alveolar bone crest (ABC) measurements. The goal of this study was to develop a correction coefficient by considering this proportion. Twenty-one artificial teeth, molars and premolars, and bovine ribs were used. Interproximal radiographs were taken with the aid of a positioner. The vertical angles used were: 0°, + 5°, and + 10°, and processed using three spatial resolutions measured in line pairs per mm (lp/mm): 20, 25 and 40. The Perio filter was applied to each image, in addition to the original one. Combinations of angle, resolution, and filter were made. Eighteen images were analyzed by three specialists, resulting in 252 measurements for each evaluator, totaling 756 measurements. The overall variability of the measurements can be explained mainly by the variation in tooth anatomy. The 0° 25 lp/mm Perio filter method was the closest one to the actual clinical scenario for both cusps and ABC. The correction factor managed to explain 71.45% of the errors. The variation in vertical angulation interferes with cusp and ABC measurements, and the angulation at 0º and spatial resolution of 25 lp/mm showed better results. The use of correction coefficients allowed approaching actual measurement values. More accurate ABC height measurements are essential even in radiographic exams that do not meet the standard of excellence because the need to repeat radiographic exams is then eliminated.

Modified Combined Impression Technique for Cawood &amp; Howell Class V/VI Mandibular Ridges: A Case Report

Geriatric prosthodontic rehabilitation with compromised residual ridge has become challenging, the principal concern being rejuvenating and maintaining complex stomatognathic functional harmony with severe residual ridge resorption (RRR). Modification of contemporary treatment techniques should be considered to achieve a patient’s functional and esthetic requirements. Contemporary prosthodontics utilizing combination of Neutral zone technique (NZ) and all green impression (AGI) for the management of Cawood &amp; Howell Class V/VI (severely resorbed) ridges are innovative techniques for the construction of removable prosthesis with a profound effect in denture stability and retention, particularly in mandible. NZ implies the principle of synergistic activity of Oro-muscular function in denture stability by arranging the prosthetic teeth within the neutral zone area, hence preventing their interfere with the oro-muscular function, while AGI aimed at achieving prosthesis retention through functional moulding and the viscosity of impression material helps disseminate the forces transmitted to the denture-bearing area reducing the potential for discomfort arise from the soft tissue folds over atrophic ridge. This case report attempts to present a combination of modified impression techniques utilizing all green impression techniques and neutral zone techniques in a 66-year-old patient for C&amp;H Class V mandibular ridge. The goal of this technique is to provide optimal stability covering the maximum denture bearing area and selectively distributing the pressure and to produce a denture molded by oro-muscular function in harmony with its surrounding structures thereby enhancing stability and retention.

In-Vitro Tooth Cleaning Efficacy and Filament End Rounding of Different Manual Children's Toothbrushes.

This in-vitro study aimed to investigate the cleaning efficacy of 18 different manual children's toothbrushes applying horizontal, vertical, and rotational movements, as well as to evaluate the rounding of their filament ends. Models equipped with artificial teeth (coated with titanium dioxide) were brushed using a brushing machine with clamped manual children's toothbrushes. The machine carried out horizontal, vertical, and rotational movements for 1 min with a constant contact pressure of 100 g. The percentage of the area of titanium dioxide removed from the buccal, mesial, distal and total surfaces of the artificial teeth corresponded to the cleaning efficacy. To assess the filament design, a scanning electron microscope was used to check the morphology of the filaments which was scored with Silverstone and Featherstone scale. SPSS 22 was used for data analysis. The rotational and the vertical movements achieved the best cleaning efficacy with all tested toothbrushes. The vast majority of the tested toothbrushes had their poorest cleaning efficacy in the horizontal movement. Only a small part of the children's toothbrushes (3 out of 18) had a correct and acceptable proportion of rounded bristle ends. Based on the present results, it could be concluded that the cleaning efficacy of different manual children's toothbrushes varied considerably. The best cleaning efficacy was almost always observed for rotational and vertical movements.

Comparative Evaluation of Mechanical Properties and Color Stability of Dental Resin Composites for Chairside Provisional Restorations.

Resin composites have become the preferred choice for chairside provisional dental restorations. However, these materials may undergo discoloration, changes in surface roughness, and mechanical properties with aging in the oral cavity, compromising the aesthetics, functionality, and success of dental restorations. To investigate the color and mechanical stability of chairside provisional composite resins, this study evaluated the optical, surface, and mechanical properties of four temporary restoration resin materials before and after aging, stimulated by thermal cycling in double-distilled water. Measurements, including CIE LAB color analysis, three-point bending test, nanoindentation, scanning electron microscopy (SEM), and atomic force microscopy (AFM), were conducted (n = 15). Results showed significant differences among the materials in terms of optical, surface, and mechanical properties. Revotek LC (urethane dimethacrylate) demonstrated excellent color stability (ΔE00 = 0.53-Black/0.32-White), while Artificial Teeth Resin (polymethyl methacrylate) exhibited increased mechanical strength with aging (p < 0.05, FS = 68.40 MPa-non aging/87.21 MPa-aging). Structur 2 SC (Bis-acrylic) and Luxatemp automix plus (methyl methacrylate bis-acrylate) demonstrated moderate stability in optical and mechanical properties (Structur 2 SC: ΔE00 = 1.97-Black/1.38-White FS = 63.20 MPa-non aging/50.07 MPa-aging) (Luxatemp automix plus: ΔE00 = 2.49-Black/1.77-White FS = 87.72 MPa-non aging/83.93 MPa-aging). These results provide important practical guidance for clinical practitioners, as well as significant theoretical and experimental bases for the selection of restorative composite resins.

Effect of wall thickness on shape accuracy of hollow zirconia artificial teeth fabricated by a 3D printer.

This study aimed to analyze how the wall thickness of 3D-printed hollow zirconia teeth affects shape accuracy. Datasets with measurement points were created for different artificial teeth resembling the mandibular right first molar (Geomagic Design X, 3D Systems). Reference distances were 9.8 mm for mesio-distal direction (M-D), 10.9 mm for bucco-lingual direction (B-L), 7.0 mm for MB-BB and DB-BB, and 4.5 mm for ML-LB and DL-LB. The outer geometry was identical for all artificial teeth with wall thicknesses of 0.30, 0.50, 0.75, and 1.00 mm. Twenty zirconia teeth were fabricated using a 3D printer (CeraFab 7500 Dental, Lithoz) for each group and sintered before support removal. After performing analog distance measurements using a micrometer screw, the digital distance measurements and angular deviations between measurement points on 3D scans were analyzed. Possible effects were investigated using nonparametric ANOVA, followed by Tukey's honest significant difference (HSD) test for multiple comparisons. The shape accuracy was acceptable for artificial teeth with wall thicknesses of ≥0.5 mm. The largest distance deviation was observed for a wall thickness of 0.3 mm. In particular, DB-BB showed a median deviation of >56.2 µm, which is significantly larger than that for other test groups, ranging from 7.4-9.5 µm (P < 0.05). In most cases, angular deviations were the largest for teeth with 0.3-mm wall thickness (11.6°) and remained below 5.0° for the other test groups. Acceptable accuracy was obtained for artificial teeth with wall thicknesses of at least 0.5 mm.

Evaluation of Microstrain in the Regions Surrounding Morse Taper and External Hexagon Implants.

The aim of this study was to compare the Morse taper (MT) + titanium base (Ti-Base) abutment with the external hexagon (EH) + Ti-Base abutment by using the strain gauge method in the mesial, distal, and apical-buccal areas around these types of implants. This study investigated two groups, MT and EH, each comprising five polyurethane samples with a dental implant in the area of artificial tooth 15 (3.75 × 11.5 mm) of a dental manikin. The strain gauges were glued to the mesial, distal, and apical-buccal polyurethane areas of all samples in relation to the implant. Ti-Base nonangled abutments measuring 5.0 × 4.7 × 1.0 mm (DSP, Brazil) were installed on the implants in each group. Ten identical zirconia crowns were constructed by scanning and milling and were subsequently cemented onto the Ti-base abutments with calcium hydroxide cement. Then, an axial load of 100 N was applied to the occlusal region of the zirconia crowns, and strain gauge measurements were taken. Strain gauge data were assessed by a two-way analysis of variance (ANOVA) with "implant connection" and "strain gauge position" factors, followed by the Bonferroni test (p < 0.05). The MT group exhibited a statistically significant reduction in microstrain in the mesial and apical strain gauge measurements compared to the EH group. The MT group exhibited less microstrain in the mesial and apical areas of the polyurethane samples near the implant. Consequently, the MT connection was considered more biomechanically advantageous.

Comparative Assessment of the Adhesion Forces of Soft Silicone Materials to the Denture Base Material (PMMA) Conditioned with Sandblasting.

In patients undergoing surgery for oral cancer, soft support materials are used to minimise trauma to the soft tissues. Silicone-based liners are widely used in prosthetic dentistry. A prerequisite for long-term Adhesion of the liner to the denture base is largely dependent on the surface preparation of the denture material. The aim of the present study was to investigate whether surface preparation of the acrylic material by sandblasting increases the adhesion of the silicone support material to the acrylic denture plate. The study included adhesion testing of four silicone-based soft cushioning materials (Silagum Comfort, Elite Soft Re-lining, Ufi Gel SC, Mucopren Soft) on a total of 270 samples. Each material was tested on 15 samples. Three subgroups with different surfaces were separated: 1 raw-standard surface treatment with a cutter, and 2 sandblasted, with 100 and 350 µm alumina grain at 90°. The samples were subjected to seasoning: 24 h and six weeks. The adhesion force of silicone to acrylic was measured by performing a tensile test using a universal two-column testing machine. The highest bond strength was recorded for Silagum on the surface prepared using 100 µm abrasive and seasoned for 6 weeks (291.5 N). The smallest among the maximum forces was recorded for the Mucopren material (81.1 N). For the Mucopren system with a raw and sand-blasted surface (350 µm), the adhesion strength increased after six weeks. In contrast, the durability of the joint decreased for the 100 µm sandblasted surface. The Elite material exhibited similar values for maximum forces (271.8 N) and minimum forces (21.1 N). The highest strength (226.1 N) was recorded for the sample from the group prepared with 350 µm abrasive and seasoned for 24 h. The lowest value (72.6 N) occurred for the sample from the group with 100 µm abrasive and seasoned for 6 weeks. Sandblasting of acrylic plastic improves adhesion to selected relining silicones. 2. The size of the abrasive employed has an impact on the adhesion between the acrylic plastic and the bedding silicone. 3. In the case of some relining systems (Mucopren), an increase in roughness through sandblasting has the effect of reducing the durability of the bonded joint.

Exploring Genetic Link of Residual Ridge Resorption in Completely Edentulous Individuals: A Prospective Case-Control Clinical Study.

Residual ridge resorption presents obstacles in prosthodontic treatment, affecting denture stability and the success of dental implants. Genetic elements, specifically the single nucleotide polymorphism (SNP) 1772C>T variant within the hypoxia-inducible factor 1 subunit alpha (HIF-1α) gene, are hypothesized to contribute to residual ridge resorption progression. Nevertheless, its impact remains insufficiently investigated, especially within the context of South Indian populations. We sought to investigate the connection between SNP 1772C>T and residual ridge resorption (RRR) among fully edentulous individuals, considering demographic factors, genotyping methodologies, and statistical evaluations. In a prospective case-control study, we recruited 100 completely edentulous participants from South India. Participants were categorized based on alveolar ridge height. Saliva samples were non-invasively collected for DNA extraction, and polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis was employed to determine genotype distribution using the HphI restriction enzyme. The statistical evaluations comprised the utilization of chi-square and Fisher's exact tests. We observed no significant variations in genotype distributions between the case and control cohorts (CT: p=0.24; CC: p=0.65; TT: p=0.30). The heterozygous genotype CT was prevalent in both groups. Although we did not observe significant associations between SNP 1772C>T and RRR, our findings imply a genetic predisposition to residual ridge resorption that warrants further exploration. Variations in genetic susceptibility across ethnicities and the influence of other genetic variants on residual ridge resorption require additional investigation. This study lays the groundwork for personalized prosthodontic care by highlighting the potential of genetic analysis in routine dental practice to improve treatment strategies.

About the retromolar pad - its particularities and role in the stability and retention of the classic complete denture

Aim. This paper aims to bring back into focus the area of the retromolar pad as an important element for the support area and for achieving an effective marginal seal in case of completely edentulous mandible. Material and methods. 24 cases of complete mandibular edentation were analyzed and the characteristics of the retromolar pad were followed. Analyzing the appearance of the retromolar pad, an attempt was made to classify them into the classes proposed by J. Lejoyeux. The clinical implications of various aspects of this area were monitored. Results. In patients with the retromolar pad in the last three classes, difficulties were encountered in adapting the individual tray and during the functional impression; in cases with advanced resorption of the alveolar ridge and unfavorable retromolar pad, a poor marginal seal was obtained. Conclusions. From the analyzed cases, it was reconfirmed that in an old complete mandibular edentation, the retromolar pad can take an oblique or vertical position. Such a situation becomes unfavorable for the retention of the complete denture, for the marginal seal. Knowing the particularities of the completely edentulous prosthetic field and the clinical stages is essential for maintaining denture stability.

Bonding Efficiency between Artificial Teeth and Denture Base in CAD/CAM and Conventional Complete Removable Dentures.

A common challenge encountered with both traditional and digitally produced dentures involves the extraction of artificial teeth from the denture base. This narrative review seeks to present an updated perspective on the adherence of synthetic teeth for denture base materials, employing diverse methods. Dental technicians often employ chemical approaches and mechanical techniques (including abrasion, laser treatment, and abrasive blasting) to augment the retention of denture teeth. However, the efficacy of these treatments remains uncertain. In certain instances, specific combinations of Denture Base Resin (DBR) materials and artificial teeth exhibit improved performance in conventional heat-cured dentures following these treatments. The primary reasons for failure are attributed to material incompatibility and inadequate copolymerization. As new denture fabrication techniques and materials continue to emerge, further research is imperative to identify optimal tooth-DBR combinations. Notably, 3D-printed tooth-DBR combinations have demonstrated reduced bond strength and less favorable failure patterns, while utilizing milled and traditional combinations appears to be a more prudent choice until advancements in additive manufacturing enhance the reliability of 3D-printing methods.

A Photographic Approach Studying the Orientation of the occlusal plane of the Malaysian Population. A Proposal for an Orienting Device

The occlusal plane is crucial in prosthodontic reconstructive treatment as it affects the most important factors for the proper functioning of the artificial prostheses. The achievement of correct occlusal plane position offers maximum aesthetic, phonetic, mastication, and patient’s satisfaction. An incorrectly oriented occlusal plane interferes with denture stability and retention, in addition to more vital functions of the teeth and oral cavity. This study used a photographic approach to determine the occlusal plane inclination in relation to some anatomical references. 95 young volunteers of Mahsa University College, aged between 20 and 25 years, were selected for this study. The participants were selected according to specific inclusion criteria. A standardized digital profile and front images were taken for each participant using a digital camera that is fixed on a tripod with the fox bite plane placed on the occlusal surfaces of the maxillary teeth. The angle amplitude of the reference planes in relation to the occlusal plane was measured using a digital protractor on the screen display. The results revealed that the least mean angle difference was with the AT1, while higher variability was found using the Frankfort plane. In addition, there were no significant differences between the two genders or among the three ethnic groups. It is concluded that the photographic method can be used successfully to study the occlusal plane, and the lowest point of the tragus is the best posterior reference point to determine the ideal location of the occlusal plane.

Surface hardness and wear resistance of prefabricated and CAD‐CAM milled artificial teeth: A cross‐over clinical study

AbstractPurposeTo clinically evaluate the surface roughness and wear resistance of prefabricated and CAD‐CAM milled acrylic resin teeth for complete dentures.Materials and methodsIn a cross‐over study design, 10 completely edentulous patients were randomly included in this study and given two complete dentures. The first complete denture was made using prefabricated teeth, while the second was constructed using CAD‐CAM milled teeth. Following insertion (T0), 3 months (T3), and 6 months (T6), the complete dentures were scanned. Utilizing 3D surface super‐imposition techniques, the vertical (2D wear), and volumetric (3D wear) material loss were measured. The hardness of the teeth was evaluated at the time of denture insertion (T0) and then after 6 months (T6) of denture insertion by digital Vickers hardness tester. Statistical analysis was done using SPSS software. Paired groups were compared by paired t‐test. Also, a repeated measure test was used. The significant difference was considered if p ≤ 0.05.ResultsThe time of denture function was linearly correlated with the wear of the prefabricated and CAD‐CAM milled denture tooth. Prefabricated acrylic teeth had significantly more vertical and volumetric wear after 3 and 6 months, compared to CAD‐CAM milled denture teeth where p‐values were 0.01, 0.009, 0.003, and 0.024, respectively. Additionally, CAD‐CAM milled teeth displayed significantly higher hardness values than prefabricated teeth both before and after 6 months of use where p‐values were 0.001. After 6 months, all studied teeth showed a decrease in their hardness.ConclusionsIn terms of wear resistance and surface hardness, CAD‐CAM milled acrylic resin teeth were superior to prefabricated acrylic resin artificial teeth once the complete denture functions.

Comparison of Debonding of Different Composite Resin Bonds and Acrylic Tooth with Acrylic Denture Base after Thermocycling Regimes.

Background and objectives: The purpose of this study was to repair detached acrylic tooth using composite resin and comparing it debonding with cold cure acrylic after thermocycilg process. Methods: Materials used in the study include: four composite groups (Ceram, Composan, ESTELITE and Dynamic Plus) with a single group of acrylic artificial teeth bonded to acrylic (n=10). Specimens have tested the thermocycling then specimens were subjected to stress using a universal testing machine. Results: The outcome data statistically were analyzed, results showed that (ESTELITE) Tokoyama, brand has the highest value of tensile bond strength (7.05 MPa), and the lowest one Cerama brand with the (5.12 MPa) mean composite groups, but the cold cure acrylic one with the (2.07 MPa). Conclusion: Replacement of missing artificial teeth on the denture base with a different brand of composite can be done as an alternative to acrylic teeth and the thermocycling regime influence the debonding process. Keywords: Composite Resin, Artificial Teeth, Denture Base, Thermocycling, Debonding.

Fully integrated additive manufacturing of an obturator prosthesis for an edentulous patient with a maxillectomy defect

Maxillary defects pose challenges for prosthodontists, especially when patients have no remaining teeth. This clinical report describes rehabilitation with a complete denture obturator fabricated in 2 visits for an edentulous patient after a maxillectomy. The obturator base and artificial teeth were digitally designed and merged into a 1-piece prosthesis. Following a virtual reduction, the integrated prosthesis and a gingival veneer were calculated and then printed and bonded together to complete the fabrication. Balanced occlusion was achieved with the assistance of a digital occlusion analyzer at the insertion visit. This approach avoided base-tooth assembly deviations and provided a prosthesis with good patient-reported outcomes at the 6-month follow-up.

Fabrication of surveyed crown and repairing the artificial teeth for existing removable partial denture using digital technology: a case report

Fabrication of surveyed crown and repairing the artificial teeth for existing removable partial denture using digital technology: a case report

Utilization Of Neutral Zone Technique In Complete Denture Fabrication For A Class III Sagittal Jaw Relation Patient

Long-term denture wearers have advanced ridge atrophy and atrophy of the musculature of the cheeks and lips and often face challenges associated with decreased mandibular denture stability. This case report highlights the successful implementation of the neutral zone technique in the fabrication of maxillary and mandibular complete dentures to address this issue. Understanding the concept of the neutral zone is essential for achieving optimal denture stability, retention, and speech quality. The steps involved in capturing and utilizing the neutral zone to improve denture stability are thoroughly described. The case exemplifies the effectiveness of the neutral zone technique in overcoming mandibular denture instability for patients with compromised edentulous ridges, resulting in enhanced patient satisfaction, improved oral function and speech.

Prosthodontic Management Of Post Covid Mucormycosis

Background: Post covid mucormycosis although very uncommon, came to the limelight after the covid pandemic owing to the decrease in immunity of affected individuals. Post treatment, most of the patients were subjected to physical and mental trauma owing to the aggressive resection of the affected tissues. Patients faced difficulty in swallowing, speech and it affected the esthetics which had a negative impact on the quality of life of patients. Prosthetic management of such patients involves fabrication of maxillofacial prosthesis which replaces the resected tissue thereby restoring normal oral functions. Aim: To manage patients affected by post covid mucormycosis prosthetically thereby improving the oral health of the individual. Case description: In this article three cases are described which were prosthetically managed with help of obturator, cast partial denture, and hollow denture. Conclusion: Prosthetic rehabilitation of patients affected by mucormycosis is quiet complex considering the fact that surgery cannot be planned as per prosthetic requirements. Most of the time prosthodontists are left with minimal structure which would aid in retention, stability and support of denture. Rehabilitation of such patients with implants is a question of debate as more research is required to have clarity regarding the success of implants in mucormycosis affected patients. Conventional treatment with obturator, partial and complete denture is proven to be successful.