Fabrication Of Orbital Prosthesis Research Articles

Innovative hybrid approach: digital and analog fabrication of orbital prosthesis for post-COVID-19 mucormycosis defects using photogrammetry technique

In addition to anatomical loss, removal of the full or portion of the orbit results in a facial deformity and psychological distress for the patient. This article details a practical case of prosthetic rehabilitation using digital workflow for an orbital deformity caused by post-COVID-19 Mucor mycosis. The main goal of this case study was to create a maxillofacial orbital prosthesis that is well-retained, simple to use, and accurate in terms of appearance. The study addresses the problems involved in fabricating the orbital prosthesis, particularly the unique dimensions and form of the defect, replicating the natural skin tone, and accomplishing retention by the most prudent and patient-friendly approach. Through this article, a digitised algorithm, using photogrammetry technique for facial scan, is suggested for fabricating the prosthesis.

Prosthetic Rehabilitation of a Post-COVID Mucormycosis Exenterated Orbital Defect with a Two-Piece Hollow Orbital Prosthesis

Fabrication of an orbital prosthesis for an exenterated defect caused due to post-COVID mucormycosis has always been a challenging area for a prosthodontist wherein it is very difficult to meet the patient's expectations. To fulfill the esthetic and retentive demand of prosthesis, the cost of the treatment and the complexity of the case should be considered meticulously. This case report describes the fabrication of a hollow two-piece orbital prosthesis where retention was derived from natural undercuts and magnets.

Systematic Review of Clinical Applications of CAD/CAM Technology for Craniofacial Implants Placement and Manufacturing of Orbital Prostheses.

This systematic review was aimed at gathering technical and clinical applications of CAD/CAM technology for the preoperative planning of craniofacial implants placement, designing of molds and substructures and fabrication of orbital prostheses. Following the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines, an electronic search was executed. Human studies that utilized digital planning systems for the prosthetic rehabilitation of orbital defects were included. A total of 16 studies of 30 clinical cases, which were virtually planned through various digital planning and designing software, were included. The most common preoperative data required for digital planning were CT scans in 15 cases, the 3DSS-STD-II scanning system in 5 cases, an Artec Color 3D scanner in 3 cases and a NextEngine Desktop 3D laser scanner in 2 cases. Meanwhile, the digital designing software were Ease Orbital Implant Planning EOIPlan software in eight cases, Geomagic software in eight cases, Simplant software in four cases and Artec Studio 12 Professional in three cases. Surgical templates were fabricated for 12 cases to place 41 craniofacial implants in the orbital defect area. An image-guided surgical navigation system was utilized for the placement of five orbital implants in two cases. Digital designing and printing systems were reported for the preoperative planning of craniofacial implants placement, designing of molds and substructures and fabrication of orbital prostheses. The studies concluded that the digital planning, designing and fabrication of orbital prostheses reduce the clinical and laboratory times, reduces patient visits and provide a satisfactory outcome; however, technical skills and equipment costs are posing limitations on the use of these digital systems.

Automated Noncontact Facial Topography Mapping, 3-Dimensional Printing, and Silicone Casting of Orbital Prosthesis

A proof-of-concept workflow study for the fabrication of custom orbital exenteration prostheses via automated noncontact scanning, 3D printing, and silicone casting. Noncomparative, interventional case series. Setting: Single-center institutional study. StudyPopulation: Three patients who have discontinued wearing of the ocularist-made exenteration prosthesis due to altered fit, discoloration, or material degradation. InterventionProcedure: A digital representation of the exenteration socket and contralateral periocular region was captured through noncontact facial topography mapping. Digital construction of the anterior prosthesis surface was based on the mirrored image of the contralateral side, and the posterior surface contour was based on orbital cavity geometry. The anterior and posterior surface details were digitally merged. A 2-piece mold was designed and produced in a 3D printer. Colorimetry was used to create a custom blend of pigments for incorporation into the Shore 40 silicone elastomer to generate a prosthesis that approximates the patient's skin tone. MainOutcomeMeasures: Prosthesis symmetry, skin tone match, comfort of wear, and appearance. The first copy of every 3D-printed orbital prosthesis using this fabrication workflow produced good symmetry, color match, and prosthesis fit. In one case, the recontoured second copy with improved prosthesis edge-to-skin interface was made without the patient present. A noncontact 3D scanning, computer-aided design, 3D printing, and silicone casting for fabrication of orbital prosthesis was developed and validated. This production workflow has the potential to provide an efficient, standardized, reproducible exenteration prosthesis and to overcome the principal barriers to an affordable custom prosthesis worldwide: access and cost.

Patient satisfaction of orbital prosthesis fabricated by the aid of rapid prototyping technology versus conventional technique in orbital defect patients: A crossover randomized clinical trial

Purpose: This study is to compare two types of orbital prosthesis fabrication techniques, the indirect rapid prototyping (RP) technology versus the conventional technique regarding; patient satisfaction and dimensional accuracy. Material and Methods: Eight patients with orbital defects (age range 10-45 years) were selected to be included in a cross-over randomized trial. The patients were divided into two equal groups: Group A patients (n=4) received an orbital prosthesis constructed by conventional technique followed by another one constructed by rapid prototyping technology. Group B patients (n=4) received the same treatment as the first group but in a reversed order. Patient satisfaction was evaluated through questionnaire while dimensional accuracy in comparison to the normal side was calculated for both techniques. Numerical data were analyzed using Kolmogorov-Smirnov and Shapiro-Wilk tests. For parametric data; Paired t-test was used to compare between prostheses and the normal side. For non-parametric data; Wilcoxon signed-rank test was used to compare between the two techniques. Results: Orbital prostheses made by aid of RP technology showed statistically significant higher mean satisfaction score than the conventional technique (P ≤ 0.05), both prostheses showed insignificant less eye fissure height dimensions in comparison to normal side but conventional technique showed significant less eye fissure length. Conclusion: Rapid prototyping technology improved patient`s satisfaction regarding the orbital prosthesis and it was proved to be superior than conventional technique in dimensional accuracy. (Int J Maxillofac Prosthetics 2019;1:27-32)

Semiautomated fabrication of a custom orbital prosthesis with 3-dimensional printing technology

The fabrication of orbital prostheses is complex and time-consuming. A virtual orbital prosthesis and its negative mold are presented by using a 3D printer. This method avoids damage to the soft tissue or patient discomfort and reduces the time and skill required to fabricate a custom orbital prosthesis.

Conventional Approach for Fabrication of Orbital Prosthesis: A Case Report

Facial defect rehabilitation is a very critical task which requires personalized design of the prosthesis for each patient. Eyes are vital organ not only for vision but also for the facial expression. Disfigurement due to loss of an eye and associated structures may cause physical and psychological distress to the patient. Rehabilitating such patient with a removable orbital prosthesis is an economical and patient-friendly procedure which restores the patient's social as well as the cosmetic value. The present article describes a conventional technique for the fabrication of a spectacle retained acrylic resin orbital prosthesis providing accurate and effective rehabilitation. BJHS 2018;3(2)6:495-499.

36. Simplified technique for orbital prosthesis fabrication: a clinical report.

36. Simplified technique for orbital prosthesis fabrication: a clinical report.

Orbital prosthesis fabrication: current challenges and future aspects

Orbital prosthesis fabrication: current challenges and future aspects Binit Shrestha, Sita Thaworanunta Maxillofacial Prosthetic Service, Department of Prosthodontics, Faculty of Dentistry, Mahidol University, Bangkok, Thailand Abstract: Orbital defect, arising from tumor-related resections, trauma, and congenital anomalies, can lead to negative functional and psychological effects in the patients. Rehabilitation with an orbital prosthesis can provide satisfactory aesthetic outlook and can be combined with surgical reconstruction to improve the retention. Despite less than ideal properties, silicone elastomer is the most commonly used material to fabricate orbital prosthesis. Several studies have been conducted on developing newer materials and improving the properties of silicone elastomer. Craniofacial implants offer greater retention compared to adhesives, but they have been observed to have a higher risk of implant failure and related side effects when placed in irradiated bone. This review gives a scope on understanding the current challenges faced during fabrication of orbital prosthesis and the future directions of this field. Keywords: orbital defect, silicone prosthesis, CAD/CAM, craniofacial implants

Vacuum form sheet as a guide for fabrication of orbital prosthesis

Rehabilitation with an orbital prosthesis is done when surgical reconstruction is not possible or affordable in patients with orbital exenteration. Fabrication of orbital prosthesis requires precision in placement of the ocular portion of the prosthesis on the facial moulage. This method describes the use of a vacuum formed sheet for making an orbital template that acts as a guide for achieving optimum orientation of the ocular portion of the prosthesis.

An Innovative Three Part Prosthetic Rehabilitation of Class-1V Facial Defect

Loss of maxillo facial structures due to neoplasm, trauma and accidents gives inconsolable mental, physical and psychological agony to a person's dignified life in his living society. Surgical reconstruction was not feasible for all cases and certain cases needs prosthetic rehabilitation. In this clinical case report, an innovative, simple three part maxillo orbital prosthesis fabrication using magnets was explained.

Orbital Prosthetic Rehabilitation in “ADAM Complex” Multiple Orofacial-Cleft Disruption Syndrome

To be human is great; to look human is wonderful! It is nature's greatest gift! Mother nature's womb is the safest place on earth for any life, but the calamity strikes and no one knows how Hence, Treasure your exceptions!, since nature seems nowhere accustomed more openly to display, its secret mysteries than in cases where it shows traces of its workings apart from the beaten path. A dismorphological pattern of congenital oro-craniofacial and limb defects which is a rare form of amniotic rupture sequence required persistent coordinated efforts of multiple disciplines and had manifested as bizarre orofacial clefting, cat eye syndrome with an ectopic eye, and aberrant tissue band lesions on limb. The challenge was to meet the child's clamour for functional demands on premature exposure to open world and was overcome through a phased treatment implementation. Anophthalmos resulting from multiple ophthalmic surgeries for aberrant ectopic left eye and cat eye syndrome of right eye required a staged sequential preemptive planning for a successful outcome. Every phase of fabrication of orbital prosthesis comes with an impending challenge. Thus, a well-defined technique eliminating the common errors and creating a natural looking prosthesis, in the face of limitations, is imperative.

Simplified Technique for Orbital Prosthesis Fabrication: A Clinical Report

Loss of orbital content can cause functional impairment, disfigurement of the face, and psychological distress. Rehabilitation of an orbital defect is a complex task, and if reconstruction by plastic surgery is not possible or not desired by the patient, the defect can be rehabilitated by an orbital prosthesis. The prosthetic rehabilitation in such cases depends on the precisely retained, user-friendly removable maxillofacial prosthesis. Many times, making an impression of the orbital area with an accurate record of surface details can be a difficult procedure. The critical areas are making a facial moulage, mold preparation, and attaching the retention device, particularly when eyeglass frames are used. This case focuses on these hindrance factors. A simple basket was used for the impression tray to obtain the facial moulage. A putty mold was used, and attachment of the prosthesis to a retention device was accomplished with positional distance. This method proves to be an economical and simple way of making an orbital prosthesis.

Fabrication of orbital prosthesis - A case report

Fabrication of orbital prosthesis - A case report

Two-piece orbital prosthesis.

Abstract Many different approaches have been advocated in the literature for the fabrication of orbital prostheses. An alternate technique using a two-piece system and magnetic retention between the two has been described. This technique has been successful in the prosthetic rehabilitation of patients treated for orbital exenteration.

Orbital prostheses

This article presents the steps used in fabricating an orbital prosthesis. Major considerations such as selection of the spectacle frame and the artificial eye, eye alignment, and clay modeling are emphasized to ensure an esthetically acceptable prosthesis. A simple technique for construction of wax templates for fabrication of orbital prostheses in acrylic resin also was described.

Fabrication of orbital prosthesis

International Abstracts of Plastic and Reconstructive Surgery: Implants and Transplants: Prostheses: PDF Only

Fabrication of orbital prosthesis

This article presents an outline of the steps used in constructing an orbital prosthesis. A two piece metal mold is made for processing the thermally cured vinyl resin. Pertinent considerations in executing the impressions, sculpturing and processing are emphasized to insure an esthetically acceptable prosthetic replacement.