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General Dentistry 2024Squamous cell carcinoma (SCC) is the type of cancer that most frequently affects the oral cavity, mainly in men older than 50 years of age. Treatment for oral SCC often...
Squamous cell carcinoma (SCC) is the type of cancer that most frequently affects the oral cavity, mainly in men older than 50 years of age. Treatment for oral SCC often involves surgical excision of the affected margins, resulting in mutilation that affects the patient's quality of life. The objective of this case report is to describe the prosthetic treatment of a 56-year-old man who underwent total glossectomy, resulting in speech and swallowing difficulties. The proposed treatment was a tongue prosthesis retained by orthodontic clasps on the mandibular first molars. After maxillary and mandibular complete-arch impressions were performed and casts were prepared for prosthetic planning, an acrylic resin plate and 3 tongue prototypes were fabricated. Esthetic and functional tests were carried out, and 2 tongue models (1 for speech and 1 for eating) were selected for acrylization, finishing, and polishing. After placement of the prostheses, the patient was referred for follow-up with a speech therapist to improve his adaptation with the prostheses. The patient was satisfied with the prostheses and able to perform the functions of chewing, swallowing, and speech production, which helped in his social reintegration and improved his quality of life.
Topics: Male; Humans; Middle Aged; Glossectomy; Quality of Life; Dental Implants; Tongue; Mouth Neoplasms; Tongue Neoplasms
PubMed: 38640007
DOI: No ID Found -
The European Journal of Prosthodontics... Apr 2024The purpose of this study was to investigate the influence of undercut depths on abutment teeth regarding the retentive force of clasps fabricated through selective...
INTRODUCTION
The purpose of this study was to investigate the influence of undercut depths on abutment teeth regarding the retentive force of clasps fabricated through selective laser melting (SLM), and to compare them with conventional cast clasps.
METHODS
Akers clasps made of cobalt chromium alloy were fabricated using the SLM method (SLM), and the retentive forces were compared with clasps made with the conventional cast method (Cast). Three undercut amounts (0.25 mm, 0.15 mm, and 0 mm) were applied on the abutment tooth. The specimens were subjected to 10,000 repetitive insertion/removal cycles.
RESULTS
SLM-0.15 showed slightly lower initial retentive force than the Cast specimens, it remained within an acceptable range. During insertion/removal test, the SLM-0.15 specimen showed a significant difference between the initial retentive force and the retentive force after 5,000 cycles, indicating that SLM-0.15 was the least likely to change in retentive force within the parameters established in this study. The inner clasp surface on the SLM groups had higher surface roughness before testing compared to the Cast specimen.
CONCLUSIONS
Akers clasps fabricated by SLM demonstrated optimal initial retentive forces with smaller undercuts than conventional Cast clasps, and the retentive forces changed less with repetitive insertion/removal.
PubMed: 38591550
DOI: 10.1922/EJPRD_2648Tomono09 -
Journal of Prosthodontic Research Oct 2023In this study, the fatigue properties of additively manufactured titanium clasps were compared with those of commercially pure titanium (CPTi) and Ti-6Al-4V (Ti64),...
PURPOSE
In this study, the fatigue properties of additively manufactured titanium clasps were compared with those of commercially pure titanium (CPTi) and Ti-6Al-4V (Ti64), manufactured using laser powder-bed fusion.
METHODS
Fourteen specimens of each material were tested under the cyclic condition at 1 Hz with applied maximum strokes ranging from 0.2 to 0.5 mm, using a small stroke fatigue testing machine. A numerical approach using finite element analysis (FEA) was also developed to predict the fatigue life of the clasps.
RESULTS
The results showed that although no significant differences were observed between the two materials when a stroke larger than 0.35 mm was applied, CPTi had a better fatigue life under a stroke smaller than 0.33 mm. The distributions of the maximum principal stress in the FEA and the fractured position in the experiment were in good agreement.
CONCLUSIONS
Using a design of the clasp of the present study, the advantage of the CPTi clasp in its fatigue life under a stroke smaller than 0.33 mm was revealed experimentally. Furthermore, the numerical approach using FEA employing calibrated parameters for the Smith-Watson-Topper method are presented. Under the limitations of the aforementioned clasp design, the establishment of a numerical method enabled us to predict the fatigue life and ensure the quality of the design phase before manufacturing.
Topics: Humans; Alloys; Titanium; Powders; Dental Clasps; Lasers; Stroke; Materials Testing
PubMed: 37032073
DOI: 10.2186/jpr.JPR_D_22_00207 -
Indian Journal of Dental Research :... Jan 2024Rehabilitation of partially edentulous arches with a cast partial denture is a commonly opted treatment modality where fixed prosthesis is not indicated. However, due to...
Rehabilitation of partially edentulous arches with a cast partial denture is a commonly opted treatment modality where fixed prosthesis is not indicated. However, due to the aesthetic compromise of the various metal components when placed in the esthetic zone, different modifications have been considered for its fabrication. This case report describes a novel way of restoring partially edentulous arches with increased masticatory efficiency and good emergence profile without compromising the patient's esthetic desires. The report describes an aesthetic alternative using thermoplastic denture base clasp like extension for anterior abutment teeth while restoring the missing teeth with a cast partial denture.
Topics: Humans; Dental Abutments; Denture Design; Denture Bases; Jaw, Edentulous, Partially; Esthetics, Dental; Dental Clasps; Female; Male
PubMed: 38934758
DOI: 10.4103/ijdr.ijdr_97_23