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Abdalqadir M, Mohammed K, Azhdar B. The impact of zirconium dioxide nanoparticles on the color stability of artificially aged heat-polymerized maxillofacial silicone elastomer. Sci Prog 2023; 106:368504231205392. [PMID: 37814535 PMCID: PMC10566275 DOI: 10.1177/00368504231205392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
The limited service life of craniofacial prostheses due to degradation and color instability is a significant challenge. This in vitro study aimed to determine how zirconium dioxide (ZrO2) nanoparticles affect the color stability of M511 heat temperature vulcanizing (HTV) maxillofacial silicone elastomers after artificial aging. ZrO2 nanoparticles were added at concentrations of 1, 2, and 3 wt% to M511 HTV silicone elastomer. Two intrinsic silicone pigments were used (red and mocha). Silicone with pigment and without ZrO2 nanoparticles were used as the control. Eighty disk-shaped specimens were fabricated and divided into eight experimental groups, each containing ten specimens (n = 10). All specimens were subjected to artificial aging, and color changes were recorded at 252, 504, and 1008 h intervals. The L*a *b * values were measured using a colorimeter and the CIE-Lab system. To interpret the recorded color differences, a 50:50 percent perceptibility threshold (ΔE* = 1.1) and acceptability threshold (ΔE* = 3.0) were implemented. A one-way analysis of variance and Tukey's post hoc test at a significance level of 0.05 were used for the statistical analysis. We found that every evaluated specimen group exhibited a chromatic change (ΔE* > 0). The ΔE* values for the mocha pigments with and without ZrO2 nanoparticles were below the perceptible threshold (1.1 units). The ΔE* values of the red pigment with and without ZrO2 nanoparticles were significantly higher than the acceptable threshold (P < 0.000). According to the findings of this in vitro study, all the specimens underwent color changes (ΔE* > 0). The red pigment exhibited highly significant chromatic alterations. In contrast, mocha pigments with and without ZrO2 nanoparticles exhibited the least color change and were below the perceptible threshold. ZrO2 nanoparticles provided important protection and showed a reduction in color change.
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Affiliation(s)
- Mohammed Abdalqadir
- Department of Prosthodontics, College of Dentistry, University of Sulaimani, Sulaimani, Iraq
| | - Kaml Mohammed
- Department of Prosthodontics, College of Dentistry, University of Sulaimani, Sulaimani, Iraq
| | - Bruska Azhdar
- Nanotechnology Research Laboratory, Department of Physics, College of Science, University of Sulaimani, Sulaimani, Iraq
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2
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Dashti H, Rajati Haghi H, Nakhaei M, Kiamanesh E. A combined digital technique to fabricate an implant-retained auricular prosthesis for rehabilitation of hemifacial microsomia. J Prosthet Dent 2021; 127:807-810. [PMID: 33454119 DOI: 10.1016/j.prosdent.2020.11.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 11/17/2020] [Accepted: 11/17/2020] [Indexed: 11/24/2022]
Abstract
Implant-retained auricular prostheses provide an excellent treatment option with better retention and stability than a conventionally retained prosthesis. This article presents a technique for auricular reconstruction for a patient with misplaced implants. The scanning process combined the use of an intraoral scanner and a facial scanner to enhance accuracy in space management for different parts of the auricular prosthesis and to reduce sculpting time.
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Affiliation(s)
- Hossein Dashti
- Assistant Professor, Department of Prosthodontics School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hamidreza Rajati Haghi
- Associate Professor, Department of Prosthodontics School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammadreza Nakhaei
- Associate Professor, Department of Prosthodontics School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ehsan Kiamanesh
- Graduate student, Resident of Prosthodontic, Department of Prosthodontics School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
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3
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B Jamayet N, J Abdullah Y, A Rajion Z, Husein A, K Alam M. New Approach to 3D Printing of Facial Prostheses Using Combination of Open Source Software and Conventional Techniques: A Case Report. THE BULLETIN OF TOKYO DENTAL COLLEGE 2017; 58:117-124. [DOI: 10.2209/tdcpublication.2016-0021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Nafij B Jamayet
- Maxillofacial Prosthetic Service, School of Dental Sciences, Universiti Sains Malaysia
| | - Yap J Abdullah
- Research and Innovation Unit, School of Dental Sciences, Universiti Sains Malaysia
| | - Zainul A Rajion
- Craniofacial Medical Imaging, School of Dental Sciences, Universiti Sains Malaysia
| | - Adam Husein
- Prosthodontic Unit, School of Dental Sciences, Universiti Sains Malaysia
| | - Mohammad K Alam
- Orthodontic Department, College of Dentistry, Al Jouf University
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4
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Şahan MH, Eskiizmir G, Ateş P. Two-Piece Extraoral Prosthetic Rehabilitation to a Perineural Invasion Lip Cancer. J Prosthodont 2016; 27:306-310. [PMID: 27517479 DOI: 10.1111/jopr.12493] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/27/2016] [Indexed: 11/28/2022] Open
Abstract
Lip cancers can severely affect a person in terms of function, esthetics, and psychological trauma. After surgical resection, lip defects require special rehabilitation. This clinical report describes a neck prosthesis of a male patient diagnosed with lower lip squamous cell carcinoma with perineural involvement. The neck prosthesis was connected to the mandibular complete denture with cobalt samarium magnets. Both prostheses improved the patient's mastication, deglutition, and esthetics.
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Affiliation(s)
- Makbule Heval Şahan
- Department of Prosthodontics, Faculty of Dentistry, Ege University, Izmir, Turkey
| | - Görkem Eskiizmir
- Department of Otolaryngology-Head & Neck Surgery, Faculty of Medicine, Celal Bayar University, Manisa, Turkey
| | - Pınar Ateş
- Department of Prosthodontics, Faculty of Dentistry, Ege University, Izmir, Turkey
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Çötert HS, Yılmaz M. Bone and Skin-Supported Stereolithographic Surgical Guides for Cranio-Facial Implant Placement. J Maxillofac Oral Surg 2016; 15:76-81. [PMID: 26929557 PMCID: PMC4759023 DOI: 10.1007/s12663-015-0804-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Accepted: 04/25/2015] [Indexed: 10/23/2022] Open
Abstract
PURPOSE Osseointegrated skin-penetrating implants enhance the retention and stability of the craniofacial prostheses and provide the long-term comfort. However, to determine the implant locations is a great challenge facing the surgeon. Implants may either be located in conventional manner or by STL generated surgical guides. MATERIALS AND METHODS Present study reports the CT based 3D virtual modeling, preoperative virtual planning and the implant placement by using a STL surgical guide, in an anotia case. RESULTS Employed materials and the methods facilitated the implant surgery while improving the operational security. CONCLUSIONS CT based 3D virtual modeling of the surgical site, determining the implant locations virtually and the STL guided placement of the craniofacial implants, were found useful applications in order to facilitating the surgical intervention and providing prevention from complications.
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Affiliation(s)
- Hamit Serdar Çötert
- />Department of Prosthodontics, Faculty of Dentistry, Ege University, 35100 Bornova, Izmir, Turkey
| | - Mustafa Yılmaz
- />Department of Plastic and Reconstructive Surgery, Faculty of Medicine, Dokuz Eylül University, 35330 İnciraltı, Izmir, Turkey
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6
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Colebeck AC, Kase MT, Nichols CB, Golden M, Huryn JM. Use of Orbital Conformer to Improve Speech in Patients with Confluent Maxillectomy and Orbital Defects. J Prosthodont 2015; 25:241-6. [PMID: 25953143 DOI: 10.1111/jopr.12282] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/28/2014] [Indexed: 11/28/2022] Open
Abstract
The basic objective in prosthetic restoration of confluent maxillary and orbital defects is to achieve a comfortable, cosmetically acceptable prosthesis that restores speech, deglutition, and mastication. It is a challenging task complicated by the size and shape of the defects. The maxillary obturator prosthesis often satisfies the objective of adequate deglutition; however, orbital defects that are not obturated in the medial, septal, or posterior walls allow air to escape, negatively impacting phonation. This article describes a technique to achieve favorable prosthetic rehabilitation in a patient with a maxillectomy and ipsilateral orbital exenteration. The prosthetic components include maxillary obturator, orbital conformer, and orbital prosthesis connected using rigid magnetic attachments.
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Affiliation(s)
- Amanda C Colebeck
- Division of Oral Oncology and Maxillofacial Prosthetics, Department of Dentistry, Erie County Medical Center, Buffalo, NY
| | - Michael T Kase
- Division of Oral and Maxillofacial Surgery and Dental Medicine, Department of Surgery, Loyola University Medical Center, Maywood, IL
| | | | - Marjorie Golden
- Dental Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY
| | - Joseph M Huryn
- Dental Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, NY
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Abstract
Rapid prototyping (RP) technologies have found many uses in dentistry, and especially oral and maxillofacial surgery, due to its ability to promote product development while at the same time reducing cost and depositing a part of any degree of complexity theoretically. This paper provides an overview of RP technologies for maxillofacial reconstruction covering both fundamentals and applications of the technologies. Key fundamentals of RP technologies involving the history, characteristics, and principles are reviewed. A number of RP applications to the main fields of oral and maxillofacial surgery, including restoration of maxillofacial deformities and defects, reduction of functional bone tissues, correction of dento-maxillofacial deformities, and fabrication of maxillofacial prostheses, are discussed. The most remarkable challenges for development of RP-assisted maxillofacial surgery and promising solutions are also elaborated.
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Affiliation(s)
- Qian Peng
- Xiangya Stomatological Hospital, Central South University , Changsha, Hunan 410008 , China
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Eleni PN, Perivoliotis D, Dragatogiannis DA, Krokida MK, Polyzois GL, Charitidis CA, Ziomas I, Gettleman L. Tensile and microindentation properties of maxillofacial elastomers after different disinfecting procedures. J Mech Behav Biomed Mater 2013; 28:147-55. [DOI: 10.1016/j.jmbbm.2013.07.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2013] [Accepted: 07/12/2013] [Indexed: 10/26/2022]
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Nomura T, Sato J, Matsuura M, Kawaguchi K, Sekiguchi R, Horie A, Seto K. Lightweight acrylic resin facial prosthesis for maxillofacial defects: a fabrication and retention method. J Prosthet Dent 2013; 110:326-30. [PMID: 24079569 DOI: 10.1016/s0022-3913(13)60384-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Extraoral maxillofacial rehabilitation for compromised or lost facial anatomy resulting from the surgical eradication of malignancy, trauma, or congenital anomalies is commonly accomplished with a silicone prosthesis. However, with increasing size and weight, a silicone prosthesis can lose retention. This report presents 2 patient treatments to introduce a fabrication and retention method for a lightweight acrylic resin facial prosthesis. The prosthesis was fabricated by bonding an acrylic resin facial shell to a computer-edited facial image printed with iron-on transfers. The completed prosthesis was attached to the skin with medical-grade double-sided adhesive tape, which maintained a tight marginal seal even when in contact with saliva and water. The strong prosthetic retention of the lightweight prosthesis enabled orofacial and speech rehabilitation, which makes it a promising alternative to the conventional silicone prosthesis, especially for the restoration of extensive maxillofacial defects.
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Affiliation(s)
- Takayoshi Nomura
- Clinical Professor, Unit of Oral and Maxillofacial Implantology, School of Dental Medicine, Tsurumi University, Yokohama, Japan.
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Magnet-retained facial prosthesis combined with maxillary obturator. Case Rep Dent 2013; 2013:406410. [PMID: 23738151 PMCID: PMC3664486 DOI: 10.1155/2013/406410] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Accepted: 03/25/2013] [Indexed: 01/16/2023] Open
Abstract
Prosthetic rehabilitation of the midfacial defects has always perplexed prosthodontists. These defects lead to functional and esthetic deficiencies. The purpose of this clinical case report was the presentation of the prosthetic rehabilitation of an extraoral-intraoral defect using two-piece prosthesis magnetically connected. This prosthesis has dramatically improved the patient's speech, mastication, swallowing, and esthetic.
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11
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Filié Haddad M, Coelho Goiato M, Micheline Dos Santos D, Moreno A, Filipe D'almeida N, Alves Pesqueira A. Color stability of maxillofacial silicone with nanoparticle pigment and opacifier submitted to disinfection and artificial aging. JOURNAL OF BIOMEDICAL OPTICS 2011; 16:095004. [PMID: 21950913 DOI: 10.1117/1.3625401] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The purpose of this study was to evaluate the color stability of a maxillofacial elastomer with the addition of a nanoparticle pigment and∕or an opacifier submitted to chemical disinfection and artificial aging. Specimens were divided into four groups (n = 30): group I: silicone without pigment or opacifier, group II: ceramic powder pigment, group III: Barium sulfate (BaSO(4)) opacifier, and group IV: ceramic powder and BaSO(4) opacifier. Specimens of each group (n = 10) were disinfected with effervescent tablets, neutral soap, or 4% chlorhexidine gluconate. Disinfection was done three times a week during two months. Afterward, specimens were submitted to different periods of artificial aging. Color evaluation was initially done, after 60 days (disinfection period) and after 252, 504, and 1008 h of artificial aging with aid of a reflection spectrophotometer. Data were analyzed by three-way ANOVA and Tukey test (α = 0.05). The isolated factor disinfection did not statistically influence the values of color stability among groups. The association between pigment and BaSO(4) opacifier (GIV) was more stable in relationship to color change (△E). All values of △E obtained, independent of the disinfectant and the period of artificial aging, were considered acceptable in agreement with the norms presented in literature.
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Affiliation(s)
- Marcela Filié Haddad
- UNESP, Araçatuba Dental School, Department of Dental Materials and Prosthodontics, Rua José Bonifácio, 1193. CEP 16015-050. Araçatuba, SP, Brazil
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12
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Mantri SS, Thombre RU, Pallavi D. Prosthodontic rehabilitation of a patient with bilateral auricular deformity. J Adv Prosthodont 2011; 3:101-5. [PMID: 21814620 PMCID: PMC3141117 DOI: 10.4047/jap.2011.3.2.101] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Revised: 03/11/2011] [Accepted: 04/20/2011] [Indexed: 11/08/2022] Open
Abstract
Maxillofacial prosthodontics is an art and science which provides life like appearance to the person with facial deformity. Maxillofacial prosthetic rehabilitation for acquired defects has become more complex and sophisticated with advancement in techniques and materials. This case report describes the clinical and laboratory procedure for fabricating an auricular prosthesis for a patient with trauma related bilateral auricular deformity. Ear prosthesis was fabricated in two parts taking retention from external auditory canal.
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13
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Ciocca L, De Crescenzio F, Fantini M, Scotti R. CAD/CAM bilateral ear prostheses construction for Treacher Collins syndrome patients using laser scanning and rapid prototyping. Comput Methods Biomech Biomed Engin 2011; 13:379-86. [PMID: 19844817 DOI: 10.1080/10255840903251304] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Ear defects in patients affected by Treacher Collins syndrome necessitate the replacement of the existing anatomic residuals of the ears with custom-made prostheses. This paper describes a multidisciplinary protocol involving both medicine and computer-aided design/computer-aided manufacturing for manufacturing ear prostheses. Using innovative prototyping technologies together with conventional silicone processing procedures, a step-by-step procedure is presented. The complete workflow includes laser scanning of the defective regions of a patient's face, the use of 3D anatomic models from an ear digital library and rapid prototyping of both substructures for bar anchoring and moulds for silicone processing.
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Affiliation(s)
- Leonardo Ciocca
- Department of Oral Sciences, University of Bologna, via S. Vitale 59, Bologna 40126, Italy.
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Ciocca L, Fantini M, De Crescenzio F, Persiani F, Scotti R. Computer-aided design and manufacturing construction of a surgical template for craniofacial implant positioning to support a definitive nasal prosthesis. Clin Oral Implants Res 2010; 22:850-6. [PMID: 21198902 DOI: 10.1111/j.1600-0501.2010.02066.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
AIM To design a surgical template to guide the insertion of craniofacial implants for nasal prosthesis retention. MATERIALS AND METHODS The planning of the implant position was obtained using software for virtual surgery; the positions were transferred to a free-form computer-aided design modeling software and used to design the surgical guides. A rapid prototyping system was used to 3D-print a three-part template: a helmet to support the others, a starting guide to mark the skin before flap elevation, and a surgical guide for bone drilling. An accuracy evaluation between the planned and the placed final position of each implant was carried out by measuring the inclination of the axis of the implant (angular deviation) and the position of the apex of the implant (deviation at apex). RESULTS The implant in the glabella differed in angulation by 7.78°, while the two implants in the premaxilla differed by 1.86 and 4.55°, respectively. The deviation values at the apex of the implants with respect to the planned position were 1.17 mm for the implant in the glabella and 2.81 and 3.39 mm, respectively, for those implanted in the maxilla. CONCLUSIONS The protocol presented in this article may represent a viable way to position craniofacial implants for supporting nasal prostheses.
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Affiliation(s)
- Leonardo Ciocca
- Maxillo-Facial Prosthodontics, Section of Prosthodontics, Department of Oral Science, Alma Mater Studiorum University of Bologna, Bologna, Italy.
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15
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Feng Z, Dong Y, Zhao Y, Bai S, Zhou B, Bi Y, Wu G. Computer-assisted technique for the design and manufacture of realistic facial prostheses. Br J Oral Maxillofac Surg 2010; 48:105-9. [DOI: 10.1016/j.bjoms.2009.05.009] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/20/2009] [Indexed: 10/20/2022]
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Ciocca L, Mingucci R, Bacci G, Scotti R. CAD–CAM construction of an auricular template for craniofacial implant positioning: A novel approach to diagnosis. Eur J Radiol 2009; 71:253-6. [DOI: 10.1016/j.ejrad.2008.05.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2008] [Revised: 04/24/2008] [Accepted: 05/02/2008] [Indexed: 11/28/2022]
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17
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Fabrication of an Auricular Prosthesis Using Computed Tomography and Rapid Prototyping Technique. J Craniofac Surg 2009; 20:1169-72. [DOI: 10.1097/scs.0b013e3181acdb95] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Immediate facial rehabilitation in cancer patients using CAD-CAM and rapid prototyping technology: a pilot study. Support Care Cancer 2009; 18:723-8. [PMID: 19513762 DOI: 10.1007/s00520-009-0676-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2009] [Accepted: 05/28/2009] [Indexed: 10/20/2022]
Abstract
PURPOSE This study describes the workflow in a procedure to create a provisional facial prosthesis for cancer patients using digital and rapid prototyping technologies without the need for supporting craniofacial implants. MATERIALS AND METHODS An integrated workflow procedure aimed at the construction of provisional silicone prosthesis was used to rehabilitate a facial disfigurement in a patient who had undergone ablative surgery of the midface. A laser scan of the defect was obtained, and a digital model of the patient's face was constructed using virtual mirroring of the healthy side and referencing the "Nose Digital Library." RESULTS The missing volume of the face was reconstructed, and a rapid-prototyped mold was devised to process the silicone prosthesis. A provisional eyeglasses-supported prosthesis designed with a CAD/CAM-projected titanium substructure was connected using the micro-components of implant prosthetic devices. CONCLUSIONS The workflow described herein offers a viable procedure for quickly restoring facial defects by means of provisional prosthetic rehabilitation.
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Subburaj K, Nair C, Rajesh S, Meshram SM, Ravi B. Rapid development of auricular prosthesis using CAD and rapid prototyping technologies. Int J Oral Maxillofac Surg 2007; 36:938-43. [PMID: 17822875 DOI: 10.1016/j.ijom.2007.07.013] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2006] [Revised: 03/01/2007] [Accepted: 07/05/2007] [Indexed: 11/20/2022]
Abstract
External ear defects can be corrected by surgery, but this may not be feasible for personal or medical reasons. Reconstructive solutions are a good alternative, but rely on the artistry and availability of the anaplastologist. A semi-automated methodology using computer-aided design (CAD) and rapid prototyping (RP) technologies was developed for auricular prosthesis development, and demonstrated in a real-life case. The correct geometry and position of the prosthesis were ensured by stacking the computed tomography scan images of the contralateral normal ear in reverse order, and joining them using a medical modelling software program. The CAD model of the remnant portion of the defective ear was subtracted from the model of the mirrored contralateral ear, using a haptic CAD system, to obtain the final geometry of the prosthesis. Polymer models were fabricated in RP systems, and used for making a corresponding mould. Medical grade silicone rubber of the appropriate colour was packed into the mould to fabricate the final ear prosthesis and fitted to the deficient side of the patient using medical grade adhesive. The computer-aided methodology gave a high level of accuracy in terms of shape, size and position of the prosthesis, and a significantly shorter lead time compared to the conventional (manual) technique.
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Affiliation(s)
- K Subburaj
- Department of Mechanical Engineering, Indian Institute of Technology, Powai, Mumbai, India
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21
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Guttal SS, Patil NP, Shetye AD. Prosthetic rehabilitation of a midfacial defect resulting from lethal midline granuloma--a clinical report. J Oral Rehabil 2007; 33:863-7. [PMID: 17002746 DOI: 10.1111/j.1365-2842.2006.01616.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Prosthetic rehabilitation of the midfacial defects has always perplexed maxillofacial prosthodontists. These midfacial defects lead to functional and cosmetic deficiencies. One of the causes of such defects is midline lethal granuloma, which is a destructive granulomatous lesion of uncertain aetiology, involving the nose, paranasal sinuses and the palate. Presented here is a clinical report of a 22-year-old male patient diagnosed to have lethal midline granuloma, who was referred to the Department of Prosthodontics, SDM College of Dental Sciences Dharwad. The patient had a severe midfacial defect involving the nose, the paranasal sinuses, the palate and the soft tissues of the face. Although the lesion was not of the rapidly progressive type at the time of rehabilitation, the non-specific inflammatory process was persisting. The patient was treated with chemotherapy and palliative therapy. The primary objective of the prosthetic rehabilitation was to provide closure of the severe defect to protect the soft tissues from environmental exposure. Secondarily the prosthesis also provided acceptable aesthetics and psychological benefit to the patient.
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Affiliation(s)
- S S Guttal
- Department of Prosthodontics, SDM College of Dental Sciences and Hospital, Dharwad, Karnataka, India
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Ciocca L, Scotti R. CAD-CAM generated ear cast by means of a laser scanner and rapid prototyping machine. J Prosthet Dent 2005; 92:591-5. [PMID: 15583570 DOI: 10.1016/j.prosdent.2004.08.021] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Sculpting a wax ear cast for use when making a definitive prosthesis for a patient who has had auricle ablative surgery, is challenging. It requires a skilled anaplastologist along with complex instrumentation able to perform facial laser scans and reproduce anatomic details. The aim of this article is to present a technique to create a cast by laser scanning a stone cast of the existing ear. A 3D laser scanner develops an integrated 3D digital image of the unaffected ear, which is copied and then mirrored. A rapid prototyping machine collects the necessary data to manufacture the definitive resin ear. This procedure is time and cost effective only if the technology is free of charge.
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