Palatal obturator prosthesis: case series

Domingues, Juliana Machado; Corrêa, Gislene; Filho, Romeu Belon Fernandes; Hosni, Elaini Sickert

doi:10.1590/1981-8637201600030000183177

Cited by 6 publications

(4 citation statements)

References 8 publications

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“…The present study evaluated the performance of a milled bar for obturator prosthesis with polygonal geometry, without cantilever and with total palatal coverage and three clips in the region of the maxillary defect, supported by five implants. This model was based on a clinical case [ 36 ] and it was observed that despite the number of implants at unaffected side, the unilateral posterior loading promoted higher stress concentration in the mesial buccal and distal palatal portions of the cervical bone (cancellous and cortical) on the most distal implant on the affected side.…”

Section: Discussionmentioning

confidence: 99%

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Stress distribution on different bar materials in implant-retained palatal obturator

et al. 2020

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Implant-retained custom-milled framework enhances the stability of palatal obturator prostheses. Therefore, to evaluate the mechanical response of implant-retained obturator prostheses with bar-clip attachment and milled bars, in three different materials under two load incidences were simulated. A maxilla model which Type IIb maxillary defect received five external hexagon implants (4.1 x 10 mm). An implant-supported palatal obturator prosthesis was simulated in three different materials: polyetheretherketone (PEEK), titanium (Ti:90%, Al:6%, V:4%) and Co-Cr (Co:60.6%, Cr:31.5%, Mo:6%) alloys. The model was imported into the analysis software and divided into a mesh composed of nodes and tetrahedral elements. Each material was assumed isotropic, elastic and homogeneous and all contacts were considered ideal. The bone was fixed and the load was applied in two different regions for each material: at the palatal face (cingulum area) of the central incisors (100 N magnitude at 45°); and at the occlusal surface of the first left molar (150 N magnitude normal to the surface). The microstrain and von-Mises stress were selected as criteria for analysis. The posterior load showed a higher strain concentration in the posterior peri-implant tissue, near the load application side for cortical and cancellous bone, regardless the simulated material. The anterior load showed a lower strain concentration with reduced magnitude and more implants involving in the load dissipation. The stress peak was calculated during posterior loading, which 77.7 MPa in the prosthetic screws and 2,686 με microstrain in the cortical bone. For bone tissue and bar, the material stiffness was inversely proportional to the calculated microstrain and stress. However, for the prosthetic screws and implants the PEEK showed higher stress concentration than the other materials. PEEK showed a promising behavior for the bone tissue and for the integrity of the bar and bar-clip attachments. However, the stress concentration in the prosthetic screws may represent an increase in failure risk. The use of Co-Cr alloy can reduce the stress in the prosthetic screw; however, it increases the bone strain; while the Titanium showed an intermediate behavior.

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Section: Discussionmentioning

confidence: 99%

“…The total number of implants and their position were based in a previous report with the similar prosthetic approach [ 11 ] ( Fig 2B ). After that Type IIb defect [ 35 ] was simulated following the length and width from a clinical report [ 36 ] ( Fig 2B ).…”

Section: Methodsmentioning

confidence: 99%

Stress distribution on different bar materials in implant-retained palatal obturator

et al. 2020

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“…During their rehabilitation, these patients receive equipment that allows them to carry on with normal daily tasks like talking and eating. [4] The process of prosthodontic rehabilitation for a patient with a maxillofacial abnormality is time-consuming and complex. It can, however, be one of the most rewarding operations if attention is paid to the right sequencing and treatment specifics.…”

Section: Figure-4 Border Moulding and Secondary Impressionmentioning

confidence: 99%

palatal obturator - a case report

Goyal

2024

Univ J Dent Sciences

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Maxillary jaw abnormalities can be traumatic, acquired, congenital, developmental, or surgical, and they can have an impact on the mouth cavity and nearby anatomical tissues. If the soft palate and/or hard palate are lost whole or partially, the remaining tissues will have an inadequate structure or will no longer function as they once did. Defects can lead to nasal reflux during deglutition and influence speech production by affecting articulation and airflow. This study aims to explore postoperative oroantral or oral-nasal communication for patients who underwent partial maxillectomy and received prosthetic rehabilitation. The complete denture was fabricated with an extension into the defect. As a result, this permanent prosthesis improved the patient's masticatory function, speech clarity, and general quality of life.

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“…When designing a hollow bulb obturator, some potential problems to consider include ensuring proper fit and comfort for the patient, preventing leakage of fluids or air, maintaining the durability and longevity of the device, and addressing any potential issues with cleaning and maintenance. It's important to carefully consider these factors to create an effective and reliable product for the intended use [5][6][7].…”

Section: Problems Associated With the Fabrication Of The Prosthesismentioning

confidence: 99%

Troubleshooting in Designing and Fabricating a Hollow Bulb Cast Partial Denture in a Partial Maxillectomy Patient: A Case Report

Selukar,

Godbole,

Tawade

et al. 2024

Cureus

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The most common complication post COVID-19is mucormycosis. It is an opportunistic infection caused by the fungus mucormycetes which belongs to the order Mucorales . This infection can spread from the oral cavity to the nasal cavity and sometimes also involve the orbit. Surgical resection of the affected region followed by its prosthetic rehabilitation is one of the viable treatment options. In this case report, we will discuss the problems in designing and fabricating a hollow bulb obturator and its solutions.

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Palatal obturator prosthesis: case series

Cited by 6 publications

References 8 publications

Stress distribution on different bar materials in implant-retained palatal obturator

Stress distribution on different bar materials in implant-retained palatal obturator

palatal obturator - a case report

Troubleshooting in Designing and Fabricating a Hollow Bulb Cast Partial Denture in a Partial Maxillectomy Patient: A Case Report

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