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Annamma LM, Hattori M, Ali IE, Dsouza J, Waqar A, Chugh A, Sumita YI. Frequently used extraoral maxillofacial prosthetic materials and their longevity - A comprehensive review. Jpn Dent Sci Rev 2024; 60:137-147. [PMID: 38595985 PMCID: PMC11001625 DOI: 10.1016/j.jdsr.2024.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 02/27/2024] [Accepted: 03/19/2024] [Indexed: 04/11/2024] Open
Abstract
The longevity of an extraoral prosthesis depends on its physical and mechanical properties and user maintenance. Faced with multiple outcome measures, researchers find it difficult to determine the most appropriate extraoral prosthetic material. This comprehensive review evaluates the most used extraoral prosthesis materials and qualitatively assesses their longevity and function. The study aims to identify and interpret the results of current updates on the factors that affect longevity and functionality. This comprehensive review summarizes and evaluates differences in the properties of commonly used extraoral maxillofacial prosthetic materials. The review was planned to focus on all factors related to the longevity and function of the extraoral maxillofacial prosthetics. An electronic search covered English articles in PubMed, Scopus, Google Scholar, Web of Science, and grey literature. Manual searching was also performed. Six authors participated in the screening. Search engines extracted 1107 records, and 88 studies were included for qualitative and bias assessments. Silicones are the most frequently used extraoral maxillofacial prosthetic materials. Heat-cured silicones are more color-stable than those cured at room temperature. Additional ingredients and processing techniques affect prosthesis longevity.
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Affiliation(s)
- Lovely M. Annamma
- Department of Clinical Sciences, College of Dentistry, Ajman University, Ajman, United Arab Emirates
| | - Mariko Hattori
- Advanced Prosthodontics, Tokyo Medical and Dental University, Tokyo, Japan
| | - Islam E. Ali
- Advanced Prosthodontics, Tokyo Medical and Dental University, Tokyo, Japan
- Department of Prosthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Jovita Dsouza
- Department of Periodontics, Gulf Medical University, Ajman, United Arab Emirates
| | - Anam Waqar
- AI Hayat Medical Center, UmAl Quain, UAE
| | - Anshul Chugh
- Advanced Prosthodontics, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yuka I. Sumita
- Division of General Dentistry 4, Nippon Dental University Hospital, Tokyo, Japan
- Tokyo Medical and Dental University, Tokyo, Japan
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Han X, Bai Z, Mogushi K, Hase T, Takeuchi K, Iida Y, Sumita YI, Wakabayashi N. Machine Learning Prediction of Tongue Pressure in Elderly Patients with Head and Neck Tumor: A Cross-Sectional Study. J Clin Med 2024; 13:2363. [PMID: 38673635 PMCID: PMC11051183 DOI: 10.3390/jcm13082363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/05/2024] [Accepted: 04/07/2024] [Indexed: 04/28/2024] Open
Abstract
Background: This investigation sought to cross validate the predictors of tongue pressure recovery in elderly patients' post-treatment for head and neck tumors, leveraging advanced machine learning techniques. Methods: By employing logistic regression, support vector regression, random forest, and extreme gradient boosting, the study analyzed an array of variables including patient demographics, surgery types, dental health status, and age, drawn from comprehensive medical records and direct tongue pressure assessments. Results: Among the models, logistic regression emerged as the most effective, demonstrating an accuracy of 0.630 [95% confidence interval (CI): 0.370-0.778], F1 score of 0.688 [95% confidence interval (CI): 0.435-0.853], precision of 0.611 [95% confidence interval (CI): 0.313-0.801], recall of 0.786 [95% confidence interval (CI): 0.413-0.938] and an area under the receiver operating characteristic curve of 0.626 [95% confidence interval (CI): 0.409-0.806]. This model distinctly highlighted the significance of glossectomy (p = 0.039), the presence of functional teeth (p = 0.043), and the patient's age (p = 0.044) as pivotal factors influencing tongue pressure, setting the threshold for statistical significance at p < 0.05. Conclusions: The analysis underscored the critical role of glossectomy, the presence of functional natural teeth, and age as determinants of tongue pressure in logistics regression, with the presence of natural teeth and the tumor site located in the tongue consistently emerging as the key predictors across all computational models employed in this study.
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Affiliation(s)
- Xuewei Han
- Department of Advanced Prosthodontics, Graduate School, Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 1138510, Japan; (X.H.); (Z.B.); (N.W.)
| | - Ziyi Bai
- Department of Advanced Prosthodontics, Graduate School, Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 1138510, Japan; (X.H.); (Z.B.); (N.W.)
| | - Kaoru Mogushi
- Institute of Education, Tokyo Medical and Dental University, Tokyo 1138510, Japan; (K.M.); (T.H.)
| | - Takeshi Hase
- Institute of Education, Tokyo Medical and Dental University, Tokyo 1138510, Japan; (K.M.); (T.H.)
- Faculty of Pharmacy, Keio University, Tokyo 1088345, Japan
- Center for Mathematical Modelling and Data Science, Osaka University, Osaka 5608531, Japan
- The Systems Biology Institute, Tokyo 1410022, Japan
| | - Katsuyuki Takeuchi
- Institute of Education, Tokyo Medical and Dental University, Tokyo 1138510, Japan; (K.M.); (T.H.)
| | - Yoritsugu Iida
- Institute of Education, Tokyo Medical and Dental University, Tokyo 1138510, Japan; (K.M.); (T.H.)
| | - Yuka I. Sumita
- Department of Advanced Prosthodontics, Graduate School, Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 1138510, Japan; (X.H.); (Z.B.); (N.W.)
- Department of Partial and Complete Denture, The Nippon Dental University School of Life Dentistry, Tokyo 1028159, Japan
| | - Noriyuki Wakabayashi
- Department of Advanced Prosthodontics, Graduate School, Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 1138510, Japan; (X.H.); (Z.B.); (N.W.)
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Chugh A, Hattori M, Aboelez MA, Sumita YI, Wakabayashi N. Assessment of the color stability of two silicone elastomers for maxillofacial prostheses upon exposure to cold beverages. J Oral Sci 2024; 66:116-119. [PMID: 38447982 DOI: 10.2334/josnusd.23-0360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
PURPOSE This study investigated the color stability of different commercially available silicone materials for facial prostheses upon exposure to everyday beverages. It was hypothesized that the beverages would not alter the color of the silicone under conditions simulating daily exposure. METHODS Sixty specimens were fabricated using two materials - VST-50 and Silfy - and exposed to commercially available cold mineral water, tea, or coffee. Specimen color was evaluated on days 1 and 15. The color was measured with a spectrophotometer based on CIELab system and color differences were calculated as ΔE. Statistical analysis was performed using the Kruskal-Wallis test and Mann-Whitney U test. RESULTS The mean ΔE values after 15 days of exposure to mineral water, cold green tea, and coffee were 1.016, 3.480, and 3.636 for VST-50 and 0.440, 0.798, and 1.425 for Silfy, respectively. Both materials showed significant differences in color, and VST-50 showed a greater color change than Silfy, especially for coffee. CONCLUSION Pigmented silicone elastomers have low color stability, leading to an overall color change in silicone prostheses when exposed to pigmented beverages. Color changes in such prostheses can be mitigated by selecting materials with better color stability to extend their longevity.
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Affiliation(s)
- Anshul Chugh
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
- Department of Prosthodontics, Crown and Bridge, Postgraduate Institute of Dental Sciences
| | - Mariko Hattori
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Marwa A Aboelez
- Department of Prosthodontics, Faculty of Dentistry, Mansoura University
| | - Yuka I Sumita
- Division of General Dentistry 4, The Nippon Dental University Hospital
- Tokyo Medical and Dental University
| | - Noriyuki Wakabayashi
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
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Han X, Hattori M, Sumita YI, Haraguchi M, Wakabayashi N. Factors Related to Masticatory Rhythm in Patients with Oral Tumors. J Clin Med 2024; 13:1926. [PMID: 38610691 PMCID: PMC11012922 DOI: 10.3390/jcm13071926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 03/17/2024] [Accepted: 03/18/2024] [Indexed: 04/14/2024] Open
Abstract
Background: Older adults who have undergone surgery for oral tumors are at increased risk of impaired masticatory rhythm. This study investigated the correlations between masticatory rhythm, objective masticatory performance, and subjective masticatory performance as well as factors related to masticatory rhythm. Methods: The participants were 44 adults (24 men, 20 women; age range 42~90 years old) who had undergone maxillectomy, mandibulectomy, or glossectomy and were rehabilitated with a maxillofacial prosthesis. The number of functional contact teeth pairs was confirmed by intraoral examination. Chewing rate, cycle duration, coefficient of variation (CV) for cycle duration (reflecting the stability of masticatory rhythm), and mixing ability were measured simultaneously using a mastication movement rhythm tracking device during gum chewing. Maximum occlusal force was measured using the dental prescale system. Patients' perception of chewing ability was rated using a questionnaire. Results: The Spearman's rank correlation test revealed that mixing ability, patient-rated masticatory scores, cycle duration, CV for cycle duration, and maximum occlusal force showed significant correlations with chewing rate. Multiple linear regression analysis identified mixing ability and the CV for cycle duration as significant predictors of masticatory rhythm. Conclusions: Factors associated with a faster chewing rate were higher mixing ability and masticatory scores, greater maximum occlusal force, shorter cycle duration, and smaller CV for cycle duration. Stable masticatory rhythm and mixing ability are significant predictors of chewing rate. Poor masticatory performance and unstable masticatory rhythm can result in slower chewing and thus a higher risk of inadequate dietary intake.
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Affiliation(s)
- Xuewei Han
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo 113-8549, Japan; (X.H.); (M.H.); (Y.I.S.); (N.W.)
| | - Mariko Hattori
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo 113-8549, Japan; (X.H.); (M.H.); (Y.I.S.); (N.W.)
| | - Yuka I. Sumita
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo 113-8549, Japan; (X.H.); (M.H.); (Y.I.S.); (N.W.)
- Division of General Dentistry 4, The Nippon Dental University Hospital, Tokyo 102-8158, Japan
| | - Mihoko Haraguchi
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo 113-8549, Japan; (X.H.); (M.H.); (Y.I.S.); (N.W.)
| | - Noriyuki Wakabayashi
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo 113-8549, Japan; (X.H.); (M.H.); (Y.I.S.); (N.W.)
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Chugh A, Hattori M, Towithelertkul C, Sumita YI, Wakabayashi N. Evaluation of the color stability of three maxillofacial silicone materials after exposure to beverages: An in vitro study. Heliyon 2024; 10:e25529. [PMID: 38370236 PMCID: PMC10867345 DOI: 10.1016/j.heliyon.2024.e25529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 01/26/2024] [Accepted: 01/29/2024] [Indexed: 02/20/2024] Open
Abstract
Purpose Oral cancer often requires treatments like surgical intervention, involving surgical resection of lips and other facial parts. For those patients, prosthetic rehabilitation following surgery promotes social reintegration. This study explores the color stability of various commercially available silicone materials for facial prostheses when exposed to everyday beverages like coffee and tea. The hypothesis is that these beverages can induce color changes in silicones, simulating conditions of daily use. Material and methods A total of 90 specimens were fabricated. There were 30 specimens deefor each of 3 nonpigmented silicone elastomers: Silfy, A-2186-F and VST-50 and were immersed in tea or coffee at drinking temperature and evaluated for color changes at time points of 0 h, 1 h, and 6 h. The color was measured with a colorimeter that used the CIE L*a*b* system and the color change ΔΕ was calculated to quantify the color change. Statistical analysis was performed by using the Kruskal-Wallis test, the Mann-Whitney U test, and the Wilcoxon signed-rank Test. The threshold for statistical significance was P < .05. Results Color change was observed for each of the silicones exposed to the beverages (P < .05). The value of ΔE was significantly higher for A-2186-F compared with VST-50 and Silfy (P < .05 in all beverages at 6 h). The color of the elastomers progressively changed while immersed in the beverages over 6 h. The change in color was significantly greater for coffee compared with tea (P < .05). Conclusions The color stability of nonpigmented silicone elastomers is inherently low, which contributes to the overall color change of silicone prostheses when they are exposed to beverages that contain pigments. The elastomer A-2186-F had greatest values of ΔE among the materials tested. Color changes of silicone prostheses can be lessened by selecting materials with consideration of color stability to improve their longevity and extend their period of use.
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Affiliation(s)
- Anshul Chugh
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
- Department of Prosthodontics, Crown and Bridge, Postgraduate Institute of Dental Sciences, Haryana, India
| | - Mariko Hattori
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Cheewin Towithelertkul
- Department of Prosthodontics, Maxillofacial prosthetics services, Mahidol University, Bangkok, Thailand
| | - Yuka I. Sumita
- Division of General Dentistry 4, The Nippon Dental University Hospital, Tokyo, Japan
- Tokyo Medical and Dental University, Tokyo, Japan
| | - Noriyuki Wakabayashi
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Bai Z, Hattori M, Sumita YI, Wakabayashi N. Case report of a patient with mandibulectomy followed up for 11 years. J Oral Sci 2024; 66:88-90. [PMID: 38030285 DOI: 10.2334/josnusd.23-0219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
Mandibular deviation and rotation following mandibulectomy can significantly impact oral function and quality of life. The postoperative course of a 57-year-old patient who underwent mandibulectomy for oral cancer and findings over 11 years of follow-up observation to monitor changes in the mandibular position are described here. Based on the observations, it is important to raise awareness regarding the necessity of continued monitoring of mandible position and regular adjustments of prostheses for patients who have undergone mandibulectomy.
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Affiliation(s)
- Ziyi Bai
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Mariko Hattori
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Yuka I Sumita
- Division of General Dentistry 4, The Nippon Dental University Hospital
| | - Noriyuki Wakabayashi
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
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Towithelertkul C, Murase M, Tamura S, Sumita YI, Wakabayashi N. Digital design of open hollow obturator framework using existing dentures: A dental technique. J Prosthet Dent 2024:S0022-3913(23)00837-5. [PMID: 38218707 DOI: 10.1016/j.prosdent.2023.12.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 12/11/2023] [Accepted: 12/14/2023] [Indexed: 01/15/2024]
Abstract
Computer-aided design and computer-aided manufacturing technology has been applied to the fabrication of maxillary obturator frameworks, both directly and indirectly. However, with earlier techniques, it was not possible to accurately determine the position of the framework conforming to the palate, an issue that has been resolved in current fabrication methods. Using the patient's existing denture, prosthodontists can determine where the framework should be positioned in the defect area. This allows the obturator bulb to be hollowed, thereby reducing weight and making adjustment easier. The most appropriate position for the finish line can be determined by accurately establishing the arrangement of the artificial teeth as well as the most appropriate polishing surface morphology. In maxillofacial prosthetics, restoring proper articulation and the swallowing function through rehabilitation is important, and determining the proper palatal morphology enables good tongue movement and facilitates the restoration of adequate function. The lighter weight contributes to protecting the remaining teeth and improves patient comfort.
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Affiliation(s)
- Cheewin Towithelertkul
- Lecturer, Department of Prosthodontics, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | - Mai Murase
- Assistant Professor, Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
| | - So Tamura
- Dental Technician, Dental Laboratory, Tokyo Medical and Dental University Hospital, Tokyo, Japan
| | - Yuka I Sumita
- Professor, Division of General Dentistry 4, The Nippon Dental University Hospital, Tokyo, Japan; and Designated Professor, Tokyo Medical and Dental University, Tokyo, Japan
| | - Noriyuki Wakabayashi
- Professor, Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Gao Y, Hattori M, Sumita YI, Wakabayashi N. Creating and analyzing digital scans of a mandibulectomy cast with simulated trismus. J Prosthet Dent 2023:S0022-3913(23)00652-2. [PMID: 37919132 DOI: 10.1016/j.prosdent.2023.09.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 09/27/2023] [Accepted: 09/27/2023] [Indexed: 11/04/2023]
Abstract
STATEMENT OF PROBLEM Trismus associated with maxillofacial defects resulting from tumor resection or radiotherapy can make dental treatment uncomfortable for patients. Using an intraoral scanner instead of making a conventional impression could help to make prosthetic rehabilitation more comfortable. However, limited information is available regarding the feasibility and accuracy of intraoral scanners for scanning mandibular defects. PURPOSE The purpose of this in vitro study was to evaluate the feasibility and accuracy of using an intraoral scanner to digitize a cast of a mandibular defect under various simulated trismus conditions. MATERIAL AND METHODS An intraoral scanner was used to scan the mandibular cast under different simulated degrees of trismus (mouth opening 10, 20, and 30 mm) and nontrismus (mouth opening 40 mm). The surface areas captured were compared. The datasets were loaded into a 3-dimensional (3D) evaluation software program and then superimposed for precision analysis and on reference data for trueness analysis. One-way analysis of variance was used to compare surface area captured, precision, and trueness of the measurement under the different mouth opening conditions (α=.05). RESULTS The surface area for which 3D data were obtained by the intraoral scanner ranged from 3199.1 to 6161.6 mm2. The area differed significantly under all mouth opening conditions (P=.001), with a smaller scanned surface area captured in severe trismus (10 mm). Precision ranged from 0.032 to 0.056 mm, and trueness from 0.037 to 0.076 mm. No significant differences were seen in precision (P=.312), but significant differences were seen in trueness (P=.016) under all trismus conditions. CONCLUSIONS Using an intraoral scanner appears feasible for digitizing mandibular defect casts with simulated mild and moderate trismus. The accuracy of the obtained data was clinically acceptable.
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Affiliation(s)
- Yuan Gao
- Doctor and Researcher, Department of Comprehensive Treatment Clinic 2, Dalian Stomatological Hospital, Dalian, PR China
| | - Mariko Hattori
- Assistant Professor, Department of Advanced Prosthodontics, Tokyo Medical and Dental University (TMDU), Tokyo, Japan.
| | - Yuka I Sumita
- Professor, Division of General Dentistry 4, The Nippon Dental University Hospital, Tokyo, Japan
| | - Noriyuki Wakabayashi
- Professor and Chair, Department of Advanced Prosthodontics, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
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Murase M, Pradhan N, Sumita YI, Wakabayashi N. Use of digital technology in prosthesis fabrication for an elderly patient with a maxillectomy and severe trismus: A clinical report. J Prosthet Dent 2023:S0022-3913(23)00330-X. [PMID: 37330360 DOI: 10.1016/j.prosdent.2023.04.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Revised: 04/13/2023] [Accepted: 04/14/2023] [Indexed: 06/19/2023]
Abstract
This clinical report describes a novel approach based on digital technology to fabricate a maxillofacial prosthesis for a 90-year-old woman with severe trismus who had undergone maxillectomy on the right side. The approach was safe, rapid, and less burdensome on this elderly patient, and the storage and communication of intraoral and maxillofacial prosthesis data without temporal and spatial constraints was helpful. A combination of digital and analog technology provided a maxillofacial prosthesis that improved the quality of life of this elderly patient with head and neck cancer and severe trismus.
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Affiliation(s)
- Mai Murase
- Specially Appointed Assistant Professor, Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
| | - Nehasha Pradhan
- Doctoral student, Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yuka I Sumita
- Professor, The Division of General Dentistry, The Nippon Dental University Hospital, Tokyo, Japan and Adjunct Lecturer, Graduate School of Tokyo Medical and Dental University, Tokyo, Japan
| | - Noriyuki Wakabayashi
- Professor, Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Wang Y, Hattori M, Masaki K, Sumita YI. Detailed speech evaluation including formant 3 analysis and voice visualization in maxillofacial rehabilitation: A clinical report. J Prosthet Dent 2023:S0022-3913(23)00221-4. [PMID: 37173176 DOI: 10.1016/j.prosdent.2023.02.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 02/24/2023] [Accepted: 02/26/2023] [Indexed: 05/15/2023]
Abstract
Objective speech evaluation such as analysis of formants 1 and 2 and nasality measurement have been used in maxillofacial rehabilitation for outcome assessment. However, in some patients, those evaluations are insufficient to assess a specific or unique problem. This report describes the use of a new speech evaluation including formant 3 analysis and voice visualization in a patient with a maxillofacial defect. The patient was a 67-year-old man who had a maxillary defect that opened to the maxillary sinus and who had an unnatural voice even when wearing an obturator. Nasality was low and the frequency of formants 1 and 2 were normal even without the obturator. However, a low frequency of formant 3 and a shifted center of voice were observed. These results indicated that the unnatural voice was related to increased resonant volume in the pharynx rather than hypernasality. This patient demonstrates that advanced speech analysis can be useful for detecting the cause of speech disorder and planning maxillofacial rehabilitation.
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Affiliation(s)
- Yujia Wang
- Graduate Student, Department of Advanced Prosthodontics, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Mariko Hattori
- Assistant Professor, Department of Advanced Prosthodontics, Tokyo Medical and Dental University (TMDU), Tokyo, Japan.
| | - Keita Masaki
- Speech-Language-Hearing Therapist, Clinic of Speech, Tokyo Medical and Dental University Hospital, Tokyo, Japan
| | - Yuka I Sumita
- Associate Professor, Department of Advanced Prosthodontics, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
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Yu H, Fujita H, Akiyama M, Sumita YI, Wakabayashi N. Prevalence of Possible Dementia in Patients with Maxillofacial Defects and Difficulty of Inserting Obturator in Maxillectomy Patients: Toward Better Provision of Supportive Care. J Clin Med 2023; 12:jcm12072722. [PMID: 37048805 PMCID: PMC10095478 DOI: 10.3390/jcm12072722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 03/27/2023] [Accepted: 04/04/2023] [Indexed: 04/14/2023] Open
Abstract
As society ages, it is important to understand the prevalence of dementia and the difficulties of inserting prostheses in patients with maxillofacial defects in order to clarify issues in supportive care. We screened 183 patients for dementia using the revised Hasegawa's dementia scale (HDS-R) at the Clinic for Maxillofacial prosthetics, Tokyo Medical and Dental University, and investigated age and sex differences in HDS-R score. We asked 47 of the 183 participants about the difficulty of inserting a maxillofacial obturator prosthesis and collected subjective comments, information about the prosthesis, and data from five assessments. Multiple regression analysis was used to reveal factors associated with insertion difficulty. Overall, 8.7% of the participants were judged to have possible dementia. Men were more likely than women to have possible dementia, and the risk increased with age. Of the 47 participants, 26 reported difficulty inserting their prosthesis, 12 of whom attributed it to their oral defect. Fourteen patients advised following doctor's instructions to practice insertion in order to become accustomed to it. A lower HDS-R score had a significant impact on insertion difficulty. Cognitive function and difficulty inserting maxillary obturator prostheses should be considered in the provision of continuous supportive care to patients with maxillary defects.
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Affiliation(s)
- Hongli Yu
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8510, Japan
| | - Haruka Fujita
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8510, Japan
| | - Masako Akiyama
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8510, Japan
| | - Yuka I Sumita
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8510, Japan
| | - Noriyuki Wakabayashi
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8510, Japan
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Hattori M, Patzelt SBM, Itoh M, Sumita YI, Wakabayashi N. Case Report: Dental treatment for an oboist: Post-trauma prosthetic rehabilitation and evaluation of musical performance. Front Psychol 2023; 13:1022205. [PMID: 36817383 PMCID: PMC9930643 DOI: 10.3389/fpsyg.2022.1022205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Accepted: 12/23/2022] [Indexed: 02/04/2023] Open
Abstract
Introduction The condition of teeth and function of the oral organs are important when playing wind or brass instruments. Although there are some reports on dental treatment for musicians, few studies have investigated their acoustic performance following treatment. This report describes the prosthodontic rehabilitation provided for an oboist who had lost a tooth as a result of trauma and includes an evaluation of her subsequent musical performance using acoustic analyzes. Case description The patient was a 63-year-old professional oboe player who fractured the upper and lower alveolar bone and avulsed the upper right central incisor during a fall due to epileptic seizure. While the alveolar fracture was healing, she sought maxillofacial rehabilitation for the missing tooth to maintain her ability to play the oboe. Her rehabilitation consisted of a provisional removable prosthesis with an acrylic base and clasps followed by a fixed implant prosthesis. A recording of her musical performance was objectively analyzed at each stage of treatment. Rhythm analysis confirmed the stability of notes played rapidly. Her performance dynamics were analyzed by psychoacoustic measurements. Her satisfaction with the prosthesis was assessed by a self-reported questionnaire. The results of the acoustic evaluation helped to adjust the provisional prosthesis so that it was suitable for playing the oboe and the final prosthesis was designed accordingly. Conclusion Prosthetic dental treatment for this patient included both subjective and objective evaluations that helped to ensure that she could continue playing the oboe at her previous performance level.
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Affiliation(s)
- Mariko Hattori
- Advanced Prosthodontics, Tokyo Medical and Dental University, Tokyo, Japan
| | - Sebastian B. M. Patzelt
- Medical Center, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine, University of Freiburg, Freiburg, Germany,Private Dental Clinic – Dres. Patzelt, Zimmern ob Rottweil, Germany
| | | | - Yuka I. Sumita
- Advanced Prosthodontics, Tokyo Medical and Dental University, Tokyo, Japan,*Correspondence: Yuka I. Sumita, ✉
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13
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Wang J, Murase M, Towithelertkul C, Tani H, Sumita YI. Custom-made radiotherapy prosthesis for external and internal radiotherapy in a patient with lip cancer. J Oral Sci 2023; 65:65-68. [PMID: 36529514 DOI: 10.2334/josnusd.22-0306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Definitive radiotherapy is an effective treatment for early-stage lip cancer. The goal of radiotherapy is to irradiate the cancer site effectively while protecting healthy surrounding tissue from the adverse effects of radiation. To this end, radiotherapy prostheses have been widely and effectively used. A maxillofacial prosthodontist working in collaboration with a radiation oncologist can create a custom-made radiotherapy prosthesis that minimizes adverse effects. This report demonstrates the successful use of spacers in external beam radiotherapy and brachytherapy in consideration of the patient's radiation therapy treatment plan and wearing conditions, ensuring adequate availability and preventing radiation-related complications.
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Affiliation(s)
- Jiangyu Wang
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Mai Murase
- Clinic for Maxillofacial Prosthetics, Tokyo Medical and Dental University Hospital
| | - Cheewin Towithelertkul
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.,Maxillofacial Prosthetics Services, Faculty of Dentistry, Mahidol University
| | - Hiroko Tani
- Clinic for Maxillofacial Prosthetics, Tokyo Medical and Dental University Hospital
| | - Yuka I Sumita
- Clinic for Maxillofacial Prosthetics, Tokyo Medical and Dental University Hospital
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14
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Zhang M, Hattori M, Akiyama M, Elbashti ME, Liu R, Sumita YI. Three-dimensional evaluation of the dental arch in cleft lip and palate after prosthetic treatment. J Prosthodont Res 2023; 67:87-92. [PMID: 35387950 DOI: 10.2186/jpr.jpr_d_21_00033] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
PURPOSE This study aimed to evaluate the stability of the surface of the maxillary teeth and mucosa in cleft lip and palate (CLP) patients with a maxilla defect or tissue deficiency according to the duration of observation and cleft type. METHODS Pairs of maxillary casts taken from 18 patients at different time points after prosthodontic treatment were investigated in this study. All 36 casts were scanned with an intraoral scanner, and the acquired images were saved in standard tesselation language (STL) files. The two STL files for each patient were then superimposed using three-dimensional (3D) evaluation software, with 3D deviations shown as a color map. Areas with a 3D deviation within ±0.100 mm were defined as stable. The influence of cleft type and duration of observation on the ratio of stable areas to the entire maxillary surface comprising the teeth and mucosa was investigated using multiple regression analysis. Statistical significance was set at p <0.05. RESULTS Multiple regression analysis showed that the duration of observation was significantly associated with the stable area ratio (B = -23.463, P<.001), whereas cleft type was not (β = 0.13, P = 0.301). CONCLUSIONS The maxillary teeth and mucosa of CLP patients changed over time, with stable areas showing a negative correlation with the observation period. However, the stability of the dental arch was not significantly affected by the cleft type. 3D analysis of the casts of CLP patients allowed for measurements and to accurately assess relapse of the maxillary arch after prosthetic treatment.
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Affiliation(s)
- Manjin Zhang
- Stomatological Hospital, Southern Medical University, Guangzhou, China
| | - Mariko Hattori
- Department of Maxillofacial Prosthetics, Tokyo Medical and Dental University, Tokyo, Japan
| | - Masako Akiyama
- Research Administration Division, Tokyo Medical and Dental University, Tokyo, Japan
| | - Mahmoud E Elbashti
- Department of Maxillofacial Prosthetics, Tokyo Medical and Dental University, Tokyo, Japan.,Laboratory of Bioengineering of Tissues, INSERM U1026, University of Bordeaux, Bordeaux, France
| | - Rongguang Liu
- Department of Maxillofacial Prosthetics, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yuka I Sumita
- Department of Maxillofacial Prosthetics, Tokyo Medical and Dental University, Tokyo, Japan
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15
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Liu R, Hattori M, Zhang M, Sumita YI. Use of an occlusal ramp for rehabilitation after a mandibulectomy and its effects on mastication. J Prosthet Dent 2023; 129:234-238. [PMID: 34030889 DOI: 10.1016/j.prosdent.2021.03.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 03/16/2021] [Accepted: 03/17/2021] [Indexed: 01/18/2023]
Abstract
STATEMENT OF PROBLEM Patients with a mandibular defect can develop mandibular deviation, resulting in a loss of or reduction in occlusal contact and ultimately loss of function. The occlusal ramp is a prosthesis used to help restore the masticatory function of such patients and is used particularly in the maxillofacial rehabilitation of patients with masticatory dysfunction resulting from mandibular deviation. The occlusal ramp is usually attached to a mandibular denture or worn as an independent device placed on the palate corresponding to the mandible that produces the offset. However, evidence of the effects of its use is sparse. PURPOSE The purpose of this clinical study was to investigate the effects of occlusal ramp use in functional rehabilitation. MATERIALS AND METHODS This study included 10 patients who had received mandibulectomies (5 men and 5 women; mean age 76.7 years, range 67 to 90 years) with deviation of the mandible. An occlusal ramp was fabricated for each participant as part of their maxillofacial prosthetic treatment. Masticatory performance was evaluated before and after the treatment by measuring glucose extraction while masticating a piece of gummy jelly. The Wilcoxon signed-rank test was used for statistical analysis (α=.05). RESULTS The median masticatory performance score, represented as glucose concentration (mg/dL), was 82.45 before treatment and 115.45 after treatment, with an overall improvement of 33.00. Scores differed significantly before and after treatment (P=.005). Masticatory performance for each participant improved in the range of 17.7 to 103.3, highlighting the role that the occlusal ramp played in mastication, although with differing effects in each participant. CONCLUSIONS Masticatory performance in participants with mandibular deviation after a mandibulectomy was significantly improved with an occlusal ramp. This suggests the effectiveness of using occlusal ramps in maxillofacial prosthetic treatment for the recovery of masticatory function in patients with mandibular deviation.
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Affiliation(s)
- Rongguang Liu
- Graduate student, Department of Maxillofacial Prosthetics, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Mariko Hattori
- Assistant Professor, Department of Maxillofacial Prosthetics, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Manjin Zhang
- Graduate student, Department of Maxillofacial Prosthetics, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Yuka I Sumita
- Associate Professor, Department of Maxillofacial Prosthetics, Tokyo Medical and Dental University (TMDU), Tokyo, Japan.
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16
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Towithelertkul C, Sumita YI, Haraguchi M, Murase M, Fujita H, Tanabe G, Kanazaki A, Yoshi S, Kosaka M, Hattori M. A 20-year clinical survey of radiotherapy prostheses at the Clinic for Maxillofacial Prosthetics of Tokyo Medical and Dental University Hospital. J Oral Sci 2023; 65:6-9. [PMID: 36631129 DOI: 10.2334/josnusd.22-0192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
PURPOSE To identify secular trends in the use of radiotherapy prostheses in the Clinic for Maxillofacial Prosthetics at Tokyo Medical and Dental University Hospital and to ascertain patient characteristics and future needs. METHODS The study included all patients who visited the clinic between January 1, 2000, and December 31, 2019. Data on numbers of cases, gender and age, numbers and types of radiotherapy prostheses, primary cancer site, and time required for prosthesis fabrication during the study period were collected from medical records and retrospectively analyzed. RESULTS During the 20-year study period, 1,066 prostheses were fabricated for 1,135 cases. In most years, at least 60% of cases were male. The mean age increased from 60.6 to 67.1 years during the study period, and the number of cases older than 70 years increased over time. The most common cancer site was the tongue, and the most common type of radiotherapy prosthesis was a spacer. The mean time for spacer fabrication was 11 days. CONCLUSION During a recent 20-year period, mean age and the proportion of elderly patients requiring savers increased. When treating elderly patients, prosthodontists responsible for fabricating radiotherapy prostheses must collaborate effectively with radiation oncologists.
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Affiliation(s)
- Cheewin Towithelertkul
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.,Clinic for Maxillofacial Prosthetics, Tokyo Medical and Dental University Hospital
| | - Yuka I Sumita
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.,Clinic for Maxillofacial Prosthetics, Tokyo Medical and Dental University Hospital
| | - Mihoko Haraguchi
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.,Clinic for Maxillofacial Prosthetics, Tokyo Medical and Dental University Hospital
| | - Mai Murase
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.,Clinic for Maxillofacial Prosthetics, Tokyo Medical and Dental University Hospital
| | - Haruka Fujita
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.,Clinic for Maxillofacial Prosthetics, Tokyo Medical and Dental University Hospital
| | - Gen Tanabe
- Clinic for Maxillofacial Prosthetics, Tokyo Medical and Dental University Hospital.,Department of Oral Microbiology, Asahi University School of Dentistry
| | - Ayako Kanazaki
- Clinic for Maxillofacial Prosthetics, Tokyo Medical and Dental University Hospital
| | - Shigen Yoshi
- Clinic for Maxillofacial Prosthetics, Tokyo Medical and Dental University Hospital
| | - Moe Kosaka
- Clinic for Maxillofacial Prosthetics, Tokyo Medical and Dental University Hospital.,Division of Dental and Digital Forensics, Graduate School of Dentistry, Tohoku University
| | - Mariko Hattori
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.,Clinic for Maxillofacial Prosthetics, Tokyo Medical and Dental University Hospital
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17
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Hattori M, Patzelt SBM, Stadler S, Kohal RJ, Vach K, Elbashti ME, Sumita YI. Computerized optical scanning of ears: An in vitro evaluation with an intraoral scanner. J Prosthet Dent 2022:S0022-3913(22)00707-7. [PMID: 36586814 DOI: 10.1016/j.prosdent.2022.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 11/05/2022] [Accepted: 11/07/2022] [Indexed: 12/30/2022]
Abstract
STATEMENT OF PROBLEM Making conventional facial impressions can be uncomfortable for the patient and complicated for the prosthodontist. Using facial scanners to digitize faces is an alternative approach. However, the initial costs of the equipment have prevented their widespread use in dental practice, and the accuracy of ear scanning is unclear. PURPOSE The purpose of this in vitro study was to investigate the accuracy of a widely used intraoral scanner for digitizing an ear model. MATERIAL AND METHODS For reference, a silicone model of an ear was scanned with an industrial scanner. Then, the model was scanned 5 times with an intraoral scanner. Five conventional impressions of the model were made with a hydrocolloid impression material and poured with dental stone. The stone casts were then digitized with a desktop scanner. The data sets acquired with the 3 approaches were analyzed by using a 3-dimensional (3D) evaluation software program. Trueness and precision values were calculated for each approach. Linear mixed models with random intercepts were fitted to each sample to evaluate the effects of the impression method on mean deviations (α=.05). RESULTS Mean ±standard deviation trueness and precision values were 0.097 ±0.012 mm and 0.033 ±0.015 mm, respectively, for the digital scan, and 0.092 ±0.022 mm and 0.081 ±0.024 mm for the conventional impression, showing a significantly lower deviation in precision for the digital approach (P<.001). CONCLUSIONS The feasibility of digitizing an ear efficiently by using the investigated intraoral scanner was demonstrated, and similar trueness and significantly better precision values were achieved than when using conventional impressions. These promising results suggest the need for clinical investigations.
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Affiliation(s)
- Mariko Hattori
- Assistant Professor, Department of Maxillofacial Prosthetics, Tokyo Medical and Dental University, Tokyo, Japan
| | - Sebastian B M Patzelt
- Adjunct Professor for Computerized Dentistry, Medical Center - University of Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine, University of Freiburg, Freiburg im Breisgau, Germany; Director, Private Dental Clinic, Zimmern o.R., Germany
| | - Sandra Stadler
- Oral Surgeon, Private Dental Clinic, Burglengenfeld, Germany
| | - Ralf J Kohal
- Professor, Medical Center - University of Freiburg, Center for Dental Medicine, Department of Prosthetic Dentistry, Faculty of Medicine, University of Freiburg, Freiburg im Breisgau, Germany
| | - Kirstin Vach
- Scientist, Medical Center - University of Freiburg, Institute for Medical Biometry and Statistics, Faculty of Medicine, University of Freiburg, Freiburg im Breisgau, Germany
| | - Mahmoud E Elbashti
- Lecturer, Department of Maxillofacial Prosthetics, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yuka I Sumita
- Associate Professor, Department of Maxillofacial Prosthetics, Tokyo Medical and Dental University, Tokyo, Japan.
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18
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Wang Y, Hattori M, Liu R, Sumita YI. Digital acoustic analysis of the first three formant frequencies in patients with a prosthesis after maxillectomy. J Prosthet Dent 2022:S0022-3913(22)00654-0. [PMID: 36460491 DOI: 10.1016/j.prosdent.2022.10.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 10/25/2022] [Accepted: 10/25/2022] [Indexed: 11/30/2022]
Abstract
STATEMENT OF PROBLEM Prosthetic rehabilitation with an obturator can help to restore or improve the intelligibility of speech in patients after maxillectomy. The frequency of formants 1 and 2 as well as their ranges were initially reported in patients with maxillary defects in 2002, and the evaluation method that was used is now applied in clinical evaluation. However, the details of formant 3 are not known and warrant investigation because, according to speech science, formant 3 is related to the pharyngeal volume. Clarifying the formant frequency values of formant 3 in patients after maxillectomy would enable prosthodontists to refer to these data when planning treatment and when assessing the outcome of an obturator. PURPOSE The purpose of this clinical study was to determine the acoustic characteristics of formant 3, together with those of formants 1 and 2, by using a digital acoustic analysis during maxillofacial prosthetic treatment. The utility of determining formant 3 in the evaluation of speech in patients after maxillectomy was also evaluated. MATERIAL AND METHODS Twenty-six male participants after a maxillectomy (mean age, 63 years; range, 20 to 93 years) were included, and the 5 Japanese vowels /a/, /e/, /i/, /o/, and /u/ produced with and without a definitive obturator prosthesis were recorded. The frequencies of the 3 formants were determined, and their ranges were calculated by using a speech analysis system (Computerized Speech Lab CSL 4400). The Wilcoxon signed rank test was used to compare the formants between the 2 use conditions (α=0.05). RESULTS Significant differences were found in the frequencies and ranges of all 3 formants between the use conditions. The ranges of all 3 formants produced with the prosthesis were significantly greater than those produced without it. CONCLUSIONS Based on the findings, both the first 2 formants and the third formant were changed by wearing an obturator prosthesis. Because formant 3 is related to the volume of the pharynx, evaluation of this formant and its range can reflect the effectiveness of the prosthesis to seal the oronasal communication and help reduce hypernasality, suggesting the utility of formant 3 analysis in prosthodontic rehabilitation.
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Affiliation(s)
- Yujia Wang
- Graduate student, Department of Maxillofacial Prosthetics, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Mariko Hattori
- Assistant Professor, Department of Maxillofacial Prosthetics, Tokyo Medical and Dental University (TMDU), Tokyo, Japan.
| | - Rongguang Liu
- Clinical Staff, The First Hospital of Shanxi Medical University, Taiyuan, China
| | - Yuka I Sumita
- Associate Professor, Department of Maxillofacial Prosthetics, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
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19
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Ali IE, Murase M, Yonehara Y, Sumita YI. Time and cost of maxillofacial prosthetic treatment: The need for assessment. Japanese Dental Science Review 2022; 58:67-68. [PMID: 35242248 PMCID: PMC8861383 DOI: 10.1016/j.jdsr.2022.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Accepted: 02/07/2022] [Indexed: 11/16/2022] Open
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20
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Towithelertkul C, Sumita YI, Murakami T, Notake R, Akiyama M, Yoshimura R, Wakabayashi N. Radiation attenuation properties of materials used to fabricate radiotherapy prostheses in vitro study. J Oral Sci 2022; 64:274-278. [PMID: 36070925 DOI: 10.2334/josnusd.22-0167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
PURPOSE This study investigates the attenuation of radiation doses by four materials, heat-polymerized, and self-polymerized polymethyl methacrylate (PMMA), putty-type, and injection-type polyvinyl siloxane (PVS) impression material. This in vitro study should aid in the selection of dental materials for radiotherapy prostheses, thereby minimizing the possibility of radiotherapy side effects. METHODS Specimens of each type were fabricated as a 5 × 5 cm squares with a thickness of 10 mm. Heat-polymerizing PMMA, self-polymerizing PMMA, putty-type PVS impression material, and injection-type PVS impression material were selected. A calibration curve was created to determine the association of radiation doses and grayscale value. A linear accelerator was used to irradiate the specimens. The radiation doses above and below the materials were measured using radiochromic film dosimetry. After film irradiation, the pixel scale of color change was used to determine the radiation dose based on the created calibration curve. The results were exported to find average doses to calculate the percentage of the attenuated dose for a comparison of the four materials. RESULTS The average attenuated doses of heat-polymerizing PMMA, self-polymerizing PMMA, putty-type PVS, and injection-type PVS were 10.8%, 6.2%, 17.2%, and 14.2% respectively. CONCLUSION PVS showed higher attenuating radiation exposure compared with PMMA.
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Affiliation(s)
- Cheewin Towithelertkul
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Yuka I Sumita
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Toshihiro Murakami
- Department of Radiation Therapeutics and Oncology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.,School of Radiological Technology, Gunma Prefectural College of Health Sciences
| | - Ryoichi Notake
- Department of Radiology, Tokyo Medical and Dental University, Medical Hospital
| | - Masako Akiyama
- Research Administration Division, Tokyo Medical and Dental University
| | - Ryoichi Yoshimura
- Department of Radiation Therapeutics and Oncology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
| | - Noriyuki Wakabayashi
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University
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21
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Haraguchi M, Towithelertkul C, Ali IE, Han X, Sumita YI. An indirect-direct technique with hot water for fabricating a cast metal crown under an existing removable partial denture. J Prosthet Dent 2022:S0022-3913(22)00491-7. [PMID: 36115708 DOI: 10.1016/j.prosdent.2022.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 07/30/2022] [Accepted: 08/02/2022] [Indexed: 11/25/2022]
Abstract
Fracture or carious lesions in an abutment tooth may require the fabrication of a crown under an existing removable partial denture. Typically, once the crown has been fabricated, the prosthesis will need to be modified or refabricated. However, if the partial denture is in good clinical condition, special techniques may be applied to make the new crown fit the existing prosthesis. This article describes a straightforward indirect-direct technique for fabricating a cast metal crown under an existing removable partial denture with hot water. The technique does not require expertise or any special device and can be performed chairside by general dentists.
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Affiliation(s)
- Mihoko Haraguchi
- Project Assistant Professor, Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan.
| | - Cheewin Towithelertkul
- Graduate student, Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan; Assistant Lecturer, Department of Prosthodontics, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | - Islam E Ali
- Graduate student, Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan; Assistant Lecturer, Department of Prosthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Xuewei Han
- Graduate student, Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Yuka I Sumita
- Associate Professor, Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
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22
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Ali IE, Hattori M, Sumita YI. Effect of cut-out rescan procedures on the accuracy of an intraoral scanner used for digitizing an ear model: An in vitro study. J Prosthodont 2022. [PMID: 35964239 DOI: 10.1111/jopr.13591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 08/07/2022] [Indexed: 11/27/2022] Open
Abstract
PURPOSE The purpose of this study was to evaluate the impact of the rescanning of mesh holes of different diameters on the accuracy of an intraoral scanner (IOS) used to digitize an ear model. MATERIALS AND METHODS An ear model was digitized using an intraoral scanner (Medit i500) to obtain a reference mesh. A baseline experimental scan was created by editing a duplicate of the reference mesh using the cut-out tool of the IOS software. Three equal groups were created based on the diameter of the cut-out areas: 2-mm (G1), 5mm (G2), and 8-mm (G3) (n = 15). The cut-out areas were rescanned and a total of 45 digital files were exported. The discrepancy between the reference and the experimental digital scans was measured using the root mean square calculation (RMS). The data were analyzed by a Kruskal-Wallis test followed by a post hoc Dunn's test with Bonferroni correction. RESULTS The trueness values ranged from 19.53 to 27.13 μm. There were significant differences in the RMS error values among the groups tested (p<.001) and post hoc multiple comparisons showed significant differences between the G1 and G2 groups (p = .04), G1 and G3 groups (p<.001), and G2 and G3 groups (p = .004). Overall, the precision values ranged from 4.93 to 7.73 μm and significant differences in the RMS values were only found between the G1 and G2 groups (p = .014). CONCLUSIONS Mesh hole rescanning affected the scanning accuracy (trueness and precision) of the IOS tested. The larger the diameter of the mesh holes, the less the trueness of the IOS tested. The precision values seemed to be less affected compared with the trueness by the cut-out and rescanning procedures. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Islam E Ali
- Doctoral student, Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.,Assistant Lecturer, Department of Prosthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Mariko Hattori
- Assistant Professor, Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yuka I Sumita
- Associate Professor, Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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23
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Towithelertkul C, Haraguchi M, Tanabe G, Fujita H, Ali IE, Han X, Sumita YI. Two-piece detachable interlocking mold for low-dose-rate brachytherapy: A dental technique for radiotherapy prosthesis fabrication. J Prosthet Dent 2022:S0022-3913(22)00430-9. [PMID: 35934571 DOI: 10.1016/j.prosdent.2022.06.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 06/04/2022] [Accepted: 06/06/2022] [Indexed: 11/18/2022]
Abstract
Brachytherapy is a type of radiotherapy used to eradicate malignancies in the head-and-neck region. Early-stage mucosal carcinomas, such as carcinomas of the hard palate and gingival mucosa, can be treated with low-dose-rate brachytherapy by using a radiotherapy prosthesis called a mold. Prosthodontists play a significant role in the design and fabrication of these molds, which deliver therapeutic doses to the primary lesion and protect adjacent tissues from radiation exposure. However, planning and observing ongoing treatment is difficult for radiation oncologists because the shield part cannot be removed from the carrier part or requires an attachment to do so. This article describes a technique for fabricating a 2-piece detachable interlocking mold without any special attachment for low-dose-rate brachytherapy.
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Affiliation(s)
- Cheewin Towithelertkul
- Graduate student, Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan; Assistant Lecturer, Department of Prosthodontics, Faculty of Dentistry, Mahidol University, Bangkok, Thailand
| | - Mihoko Haraguchi
- Project Assistant Professor, Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan.
| | - Gen Tanabe
- Dental Resident, Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Haruka Fujita
- Dental Resident, Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Islam E Ali
- Graduate student, Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan; Assistant Lecturer, Department of Prosthodontics, Faculty of Dentistry, Mansoura University, Mansoura, Egypt
| | - Xuewei Han
- Graduate student, Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Yuka I Sumita
- Associate Professor, Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
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Tanabe G, Hattori M, Obata S, Takahashi Y, Churei H, Nishiyama A, Ueno T, Sumita YI. Case Report: Psychoacoustic Analysis of a Clarinet Performance With a Custom-Made Soft Lip Shield Worn to Prevent Mucosal Erosion of Lower Lip. Front Psychol 2022; 13:852866. [PMID: 35529561 PMCID: PMC9069104 DOI: 10.3389/fpsyg.2022.852866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 03/09/2022] [Indexed: 11/21/2022] Open
Abstract
Introduction Wind instrument players sometimes suffer from erosion of the mucous membrane of the lip. This is caused by the action and pressure of the mouthpiece of the wind instrument against teeth. To address this problem, a lip shield is fitted over the dental arch to prevent direct contact between the lips and teeth. However, there are a few studies on the influence of the lip shield on the acoustics of wind instruments. The purpose of this study was to analyze the psychoacoustics of a clarinet performance with the player wearing a custom-made soft lip shield to prevent mucosal erosion of the lower lip. Case Description A lip shield was custom-made with a soft thermoplastic material for a female clarinetist who complained of mucosal erosion and pain of the lower lip. The psychoacoustics of her musical performance played in different dynamics, fortissimo, mezzo forte and pianissimo were analyzed, including loudness and sharpness. A self-evaluation questionnaire with items rated on a 10-point scale was administered. After wearing the lip shield, the patient reported that the mucosal erosion and pain of her lower lip when playing clarinet resolved. The lip shield had little effect on the loudness. There was a slight decrease in sharpness when the lip shield was worn compared to when it was not, describing the reduction of high frequencies. Furthermore, fewer variations in sharpness between the tones were observed. Conclusion The results suggest that lip shields made of soft materials can eliminate mucosal erosion and pain of the lower lip while having little effect on performance, although, a slight change in timbre is possible.
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Affiliation(s)
- Gen Tanabe
- Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, Japan.,Department of Sports Medicine/Dentistry, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, Japan
| | - Mariko Hattori
- Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, Japan
| | | | - Yuumi Takahashi
- Department of Sports Medicine/Dentistry, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hiroshi Churei
- Department of Sports Medicine/Dentistry, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, Japan
| | - Akira Nishiyama
- Department of Oral Diagnosis and General Dentistry, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, Japan
| | - Toshiaki Ueno
- Department of Sports Medicine/Dentistry, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yuka I Sumita
- Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University, Tokyo, Japan
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Ali IE, Chugh A, Cheewin T, Hattori M, Sumita YI. The rising challenge of mucormycosis for maxillofacial prosthodontists in the Covid-19 pandemic: A literature review. J Prosthodont Res 2022; 66:395-401. [DOI: 10.2186/jpr.jpr_d_21_00264] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Islam E. Ali
- Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Anshul Chugh
- Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Towithelertkul Cheewin
- Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Mariko Hattori
- Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yuka I. Sumita
- Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Murase M, Tani H, Sumita YI, Ino S, Taniguchi H. Nutritional assessment in a maxillectomy patient from the preoperative period to definitive obturator insertion: A case report. J Prosthodont Res 2021; 66:514-518. [PMID: 34645718 DOI: 10.2186/jpr.jpr_d_20_00250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PATIENT A 69-year-old Japanese male with squamous cell carcinoma of the right maxilla (T4M0N0) was referred to our department for a preoperative examination. An immediate surgical obturator was fabricated before surgery. He underwent surgical treatment, which included right subtotal maxillectomy and reconstruction with a split skin graft. One week postoperatively, the immediate surgical obturator was modified to expand the nasal cavity for obturator prosthesis. Oral intake was started 12 days postoperatively with an immediate surgical obturator in situ. The definitive obturator was fabricated after the wound surface had healed 8 months postoperatively. Assessment of the nutritional status included body mass index, serum albumin level, resting energy expenditure (REE) measured using indirect calorimetry, and predicted REE using the Harris-Benedict equation. These assessments were performed several times, from the time of admission until the definitive obturator was applied. DISCUSSION Malnutrition occurs frequently in patients with head and neck cancer because this region is vital for swallowing and mastication. Maxillectomy patients require a maxillofacial prosthesis to improve their nutritional status from the preoperative period to recovery. This case report describes maxillofacial prosthetic treatment from the perspective of nutrition. The patient wore the immediate surgical obturator postoperatively, which was followed by marked weight loss after restoration, and then weight gain returned to the normal range when wearing the definitive obturator. CONCLUSION Maxillofacial prosthetic treatments should make efforts to maintain nutritional status and achieve optimal function and quality of life in patients with head and neck cancers.
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Affiliation(s)
- Mai Murase
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hiroko Tani
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yuka I Sumita
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Shuichi Ino
- Division of Mechanical Engineering, Graduate School of Engineering, Osaka University, Osaka, Japan
| | - Hisashi Taniguchi
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
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Elbashti ME, Itamiya T, Aswehlee AM, Sumita YI, Ella B, Naveau A. Augmented Reality for Interactive Visualization of 3D Maxillofacial Prosthetic Data. INT J PROSTHODONT 2020; 33:680-683. [PMID: 33284911 DOI: 10.11607/ijp.6835] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
PURPOSE To introduce an augmented reality (AR) application for students, patients, and practitioners to use to visualize a maxillectomy defect, the associated obturator prosthesis, and the eventual effects on the patient's facial appearance. MATERIALS AND METHODS Various 3D virtual models related to maxillectomy defects and their prosthetic rehabilitations were used to illustrate the handheld AR application. The AR "scene" was created using Vuforia and Unity3D software. Within this scene, 3D virtual models were linked to the target image by detecting a symbol track marker. The final file was saved as an installable application and exported for Android smart devices. RESULTS The target image containing the maxillectomy defect and the prosthetic rehabilitation were successfully visualized interactively in 3D mode using the handheld AR maxillofacial prosthetic application. CONCLUSION An AR application for visualizing maxillofacial prosthetic data could interestingly be developed as a pedagogic tool to explain prosthetic treatments.
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Towithelertkul C, Chugh A, Hattori M, Yoshimura R, Sumita YI. A custom-made brachytherapy applicator for recurrent endometrial and vaginal cancer: A dental technique for prosthesis fabrication. J Prosthet Dent 2020; 126:711-714. [PMID: 33162114 DOI: 10.1016/j.prosdent.2020.06.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Revised: 06/03/2020] [Accepted: 06/04/2020] [Indexed: 11/25/2022]
Abstract
The role of the prosthodontist in radiation therapy includes fabrication of radiation therapy prosthetic applicators. Brachytherapy is a form of cancer treatment that involves direct insertion of radioactive implants into the tissue. In the case of vaginal cancer, brachytherapy requires the radiation oncologist to use a device called an applicator. Conventional applicators have limitations in terms of the number of radiation tubes that can be inserted, positioning of the tubes, applicator misfit, and pain when inserted. A well-fitted applicator is needed to improve the orientation of the radiation source toward the target area and to reduce the amount of scatter radiation and tissue irritation. Using an appropriate dental material to make an impression can serve to achieve these aims. This article describes a technique for fabricating an acrylic resin custom-made applicator by using techniques used in dentistry.
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Affiliation(s)
- Cheewin Towithelertkul
- Doctoral student, Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Anshul Chugh
- Doctoral student, Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan; Associate Professor, Department of Prosthodontics Crown and Bridge, Postgraduate Institute of Dental Sciences, University of Health Sciences, Rohtak, Haryana, India
| | - Mariko Hattori
- Assistant Professor, Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Ryoichi Yoshimura
- Professor, Department of Radiation Therapeutics and Oncology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yuka I Sumita
- Junior Associate Professor, Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
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Awuti S, I Sumita Y, Elbashti M, Kelimu S, Aswehlee A, Hattori M. The role of non-contact digitizer in geometrical evaluation of mandibular prostheses effect on facial asymmetry of mandibulectomy patients. J Prosthodont Res 2020; 65:86-90. [PMID: 32938856 DOI: 10.2186/jpr.jpor_2019_326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE This study sought to geometrically evaluate the effect of a mandibular prosthesis on facial asymmetry in patients with one of two different types of mandibulectomy defect. METHODS Facial data from 20 participants (9 men and 11 women; mean age 68 years) with either a reconstructed segmental defect (segmental group,n = 10) or a marginal mandibulectomy defect (marginal group, n =10) were acquired with a non-contact three-dimensional (3D) digitizer. Facial asymmetry was evaluated by superimposing a facial scan onto its mirror scan using 3D evaluation software. Facial scans with and without the mandibular prosthesis in place were also superimposed to evaluate the effect of the mandibular prosthesis. RESULTS Facial asymmetry differed significantly between subjects with and without the prosthesis in the segmental group (P = 0.005) but not in the marginal group (P = 0.16). There was no significant difference in the effect of the prosthesis on facial appearance between the two groups (P = 0.052). The ratio of 3D deviation of facial asymmetry without the prosthesis and in the mirror scan with the prosthesis differed significantly between the two groups (P = 0.01). CONCLUSIONS Placement of a mandibular prosthesis has a notable effect on facial asymmetry in patients with segmental mandibulectomy defects.
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Affiliation(s)
- Shataer Awuti
- Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo
| | - Yuka I Sumita
- Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo
| | - Mahmoud Elbashti
- Laboratory for the Bioengineering of Tissues, INSERM U1026, University of Bordeaux, Bordeaux
| | - Shajidan Kelimu
- Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo
| | - Amel Aswehlee
- Department of Dental Technology, University of Tripoli, Tripoli
| | - Mariko Hattori
- Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo
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Zhang M, Hattori M, Elbashti ME, Sumita YI. Feasibility of Intraoral Scanning for Data Acquisition of Maxillectomy Defects. INT J PROSTHODONT 2020; 33:452-456. [PMID: 32639705 DOI: 10.11607/ijp.6763] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
PURPOSE To assess the feasibility of using an intraoral scanner for data acquisition of maxillectomy defects. MATERIALS AND METHODS In 10 patients who had undergone a maxillectomy, the maxillectomy defects in dentate and edentulous maxillary arches were intraorally scanned. Intraoral photographs were also taken using a digital camera for comparison. RESULTS Adequate scanning was achieved for the nondefect side of the maxilla and for residual teeth. In some cases, it was impossible to scan the maxillectomy defect, especially the deep sites. CONCLUSION Improved intraoral scanning technology will increase the feasibility of its use in maxillofacial prosthetics.
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Awuti S, Sumita YI, Hattori M, Yoshi S, Kelimu S, Ohbayashi N, Kurabayashi T, Taniguchi H. Morphological comparison of artificial teeth position utilising denture space in glossectomy patients. Gerodontology 2019; 37:72-77. [PMID: 31820507 DOI: 10.1111/ger.12450] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 06/04/2019] [Accepted: 11/02/2019] [Indexed: 11/27/2022]
Abstract
OBJECTIVE This study aimed to compare the denture space of edentulous glossectomy patients with that of a control group from the perspective of artificial teeth positioning by using three-dimensional techniques. BACKGROUND It is known that the shape of the denture space may be affected by tongue resection or reconstruction. However, the details of artificial teeth positioning in these patients remain unclear. MATERIALS AND METHODS Six edentulous glossectomy patients aged 73-83 years and six normal participants aged 74-85 years participated in the study. Piezography was used to elucidate the characteristics of the denture space. For visualisation, piezographic records were scanned using cone beam computed tomography and the data were converted into stereolithographic format. Three-dimensional images of piezographic records were then constructed. Bucco-lingual widths of the mandibular occlusal surface were reproduced, and the camber line of the occlusal surface was set so as to simulate the position of the artificial teeth. The maximum chord of the occlusal surface on the left and right sides was recorded and measured. The discrepancy and ratio of the larger chord to the smaller chord between the right and left sides was calculated and subjected to statistical analyses using the Mann-Whitney U test. RESULTS There were significant differences in discrepancy and ratio between the left and right in the control group and the glossectomy patients (P ˂ .01). The glossectomy patients showed a greater discrepancy and ratio than the control group. CONCLUSIONS The simulated artificial teeth positions on the occlusal surface between the right and left side were asymmetric in glossectomy patients.
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Affiliation(s)
- Shataer Awuti
- Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Yuka I Sumita
- Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Mariko Hattori
- Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Shigen Yoshi
- Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Shajidan Kelimu
- Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Naoto Ohbayashi
- Department of Oral and Maxillofacial Radiology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Tohru Kurabayashi
- Department of Oral and Maxillofacial Radiology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Hisashi Taniguchi
- Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
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Elbashti ME, Sumita YI, Aswehlee AM, Seelaus R. Smartphone Application as a Low-Cost Alternative for Digitizing Facial Defects: Is It Accurate Enough for Clinical Application? INT J PROSTHODONT 2019; 32:541-543. [PMID: 31664272 DOI: 10.11607/ijp.6347] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
PURPOSE To evaluate the accuracy of a smartphone application as a low-cost approach for digitizing a facial defect for 3D modeling. MATERIALS AND METHODS A stone model of a facial defect was scanned using industrial computed tomography (reference scan) and was also scanned five times using a commercial laser scanner. A series of 24 sequenced digital photographs was taken five times by smartphone at two elevations. These images were uploaded and processed by a cloud-based server to create virtual 3D models. The 3D datasets were geometrically evaluated and compared to the reference data using 3D evaluation software. Mann-Whitney U test was used for statistical analysis, and the significance was set at P < .05. RESULTS The overall mean 3D deviation ± standard deviation for the smartphone dataset was 604.9 ± 123.5 μm compared to 67.5 ± 0.49 μm for the laser scanner. There was a significant difference in the accuracy between the commercial laser scanner and the smartphone application (P = .009). CONCLUSION The results showed that within the limits of this study and in reference to standard computed tomography imaging, data acquisition with a smartphone for 3D modeling is not as accurate as commercially available laser scanning.
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Elbashti ME, Hattori M, Patzelt SB, Aswehlee AM, Sumita YI, Taniguchi H. Precision and Trueness of Computerized Optical Impressions in Maxillectomy Defects: An In Vitro 3D Comparison. INT J PROSTHODONT 2019; 32:289-292. [PMID: 31034547 DOI: 10.11607/ijp.6077] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
PURPOSE To evaluate the precision and trueness of computerized optical impressions of maxillectomy defects. MATERIALS AND METHODS Three different maxillectomy defect models based on the Aramany classification system were used. Reference digitization of the models was performed with an industrial computerized tomography scanner. Each model was scanned five times using an intraoral scanner (True Definition). With the use of 3D evaluation software, the 3D datasets were geometrically superimposed using a best-fit algorithm to evaluate precision and trueness. Statistical analysis was performed to determine differences between the scans. RESULTS There was a statistically significant difference in both precision and trueness between Aramany classes (P < .001). CONCLUSION Digitizing maxillectomy defect models with an intraoral scanner appears to be accurate and reliable.
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Kelimu S, Hattori M, Awuti S, Elbashti ME, Sumita YI, Taniguchi H. Color change of airborne particle-abraded acrylic resin surfaces: A palatography method. J Prosthet Dent 2019; 121:671-675. [PMID: 30638596 DOI: 10.1016/j.prosdent.2018.09.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 09/04/2018] [Accepted: 09/04/2018] [Indexed: 11/26/2022]
Abstract
STATEMENT OF PROBLEM A palatogram aids prosthodontists and speech pathologists in evaluating the precise prosthetic treatment needed and the effectiveness of such treatment to improve speech intelligibility. Powder is commonly used to visualize tongue-palate contact, where wetted areas of powder in the oral cavity reveal such contact during palatography. However, discomfort and the risk of aspiration are among the shortcomings of this method, and an improved method is needed. PURPOSE The purpose of this in vitro study was to examine the feasibility of a new method of palatography that uses airborne-particle-abraded acrylic resin so that wet areas can be easily distinguished from dry areas. MATERIAL AND METHODS Seventy-two specimens of heat-polymerized acrylic resin were prepared in 6 different resin colors. After the specimens had been airborne-particle abraded, CIELab color values for each specimen were measured using a colorimeter under dry and wet conditions and recorded. Color difference (ΔE) was then computed, and a paired Student t test, 1-way analysis of variance, and multiple comparison using the Tukey post hoc analysis were applied (α=.05). RESULTS A significant color difference was found between the 2 conditions in all acrylic resin specimens examined. Mean ΔE ranged from 5.58 to 6.76. CONCLUSIONS The results indicated that an airborne-particle-abraded acrylic resin surface can show color differences made by wetting on palatograms.
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Affiliation(s)
- Shajidan Kelimu
- Graduate student, Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Mariko Hattori
- Assistant Professor, Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University (TMDU), Tokyo, Japan.
| | - Shataer Awuti
- Graduate student, Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Mahmoud E Elbashti
- Lecturer, Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Yuka I Sumita
- Junior Associate Professor, Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Hisashi Taniguchi
- Professor, Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
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Kosaka M, Sumita YI, Taniguchi H, Suzuki T, Sasaki K. Evaluation of salivary cortisol levels in relation to dento-maxillary prosthesis adjustment. J Prosthodont Res 2019; 63:73-77. [PMID: 30266664 DOI: 10.1016/j.jpor.2018.08.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 08/12/2018] [Accepted: 08/15/2018] [Indexed: 10/28/2022]
Abstract
PURPOSE The purpose of this study was to investigate the influence of dento-maxillary prosthesis adjustment procedure on levels of salivary cortisol. METHODS Nine participants (six men, three women, mean age 65.9 years) took part in this study. Saliva samples were collected before and after dento-maxillary prosthesis adjustment during the four different visits. Free cortisol levels were determined using a salivary cortisol immunoassay kit (expanded-range high-sensitivity salivary cortisol enzyme immunoassay kit, Salimetrics). Besides, original self-report sheets, a 35-item food intake questionnaire, the University of Washington Quality of Life (UW-QOL) questionnaire version 4, and the Geriatric Oral Health Assessment Index (GOHAI) questionnaire were also administered. The changes of salivary cortisol levels were analyzed using 2-level multilevel linear regression, with adjustment for age, sex, and time. Wilcoxon signed-rank test was used to compare scores of the food intake questionnaire, UW-QOL questionnaire, and GOHAI questionnaire. RESULTS Salivary cortisol levels decreased significantly after carrying out the dento-maxillary prosthesis adjustment procedure. During the third adjustment, the salivary cortisol levels were significantly low. In addition, salivary cortisol levels of participants aged 70 years and over were significantly higher than other aged groups. The total scores for grade III-V of the food intake questionnaire increased significantly. Other questionnaires had a trend toward increasing scores, yet the differences were not significant. CONCLUSIONS Within the limitations of this study, the results suggest that a reduction in symptoms of discomfort may have an influence on the decrease of salivary cortisol levels in dento-maxillary prosthesis wearers.
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Affiliation(s)
- Moe Kosaka
- Division of Dental and Digital Forensics, Tohoku University Graduate School of Dentistry, Sendai, Japan; Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Yuka I Sumita
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Hisashi Taniguchi
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Toshihiko Suzuki
- Division of Dental and Digital Forensics, Tohoku University Graduate School of Dentistry, Sendai, Japan.
| | - Keiichi Sasaki
- Division of Dental and Digital Forensics, Tohoku University Graduate School of Dentistry, Sendai, Japan; Division of Advanced Prosthetic Dentistry, Tohoku University Graduate School of Dentistry, Sendai, Japan
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Elbashti ME, Sumita YI, Kelimu S, Aswehlee AM, Awuti S, Hattori M, Taniguchi H. Application of Digital Technologies in Maxillofacial Prosthetics Literature: A 10-Year Observation of Five Selected Prosthodontics Journals. INT J PROSTHODONT 2018; 32:45–50. [PMID: 30372513 DOI: 10.11607/ijp.5932] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
PURPOSE To identify trends in the application of various types of digital technologies in maxillofacial prosthetics by identifying these digital technologies and their characteristics and reviewing the prevalence of applied digital technologies and their recent trends in the maxillofacial prosthetics literature. MATERIALS AND METHODS Five leading peer-reviewed prosthodontics journals were manually searched for maxillofacial prosthetics articles on the use of digital technologies published from January 2008 to December 2017. Descriptive statistics were used to analyze data collected on productivity, type of digital technology used, type of article, type of defect, number of authors, and geographic distribution. RESULTS Of the 336 maxillofacial prosthetics articles screened, 87 (26%) were selected for analysis. A remarkable increase was found in article productivity in the last 5 years (63%) compared to the first 5 years (37%). There was also a notable increase over the last 10 years in all digital technologies used except for evaluation technologies, which remained almost constant. Case reports most frequently mentioned use of digitization technologies (61%), design technologies (66%), and rapid prototyping technologies (66%). Original research articles most frequently mentioned use of evaluation technologies (89%); 39% of these technologies were used for intraoral defects and 27% for extraoral defects. Most often, articles had four to five authors (54%). Most published articles were from the Asia-Pacific region (44%), followed by North America (22%) and Europe (20%). CONCLUSION Although the application of digital technologies reported in the maxillofacial prosthetics literature has increased notably in leading prosthodontics journals over the last 10 years, total article productivity has remained relatively small.
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Aswehlee AM, Elbashti ME, Hattori M, Sumita YI, Taniguchi H. Feasibility and Accuracy of Noncontact Three-Dimensional Digitizers for Geometric Facial Defects: An In Vitro Comparison. INT J PROSTHODONT 2018; 31:601–606. [PMID: 30339162 DOI: 10.11607/ijp.5855] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
PURPOSE To evaluate the feasibility and accuracy of noncontact three-dimensional (3D) digitization systems for capturing facial defects. MATERIALS AND METHODS A stone model of a facial defect was digitized using high-accuracy industrial computed tomography as a reference scan. The model was also scanned using four different types of noncontact 3D digitizers: a laser beam light-sectioning technology with camera system and three different stereophotogrammetry systems. All 3D images were reconstructed with corresponding software and saved as standard triangulated language (STL) files. The 3D datasets were geometrically evaluated and compared to the reference data using 3D evaluation software. Kruskal-Wallis H tests were performed to assess differences in absolute 3D deviations between scans, with statistical significance defined as P < .05. RESULTS The four noncontact 3D digitization systems were feasible for digitizing the facial defect model, although the median 3D deviation of the four digitizers varied. There was a significant difference in accuracy among the digitizers (P < .001). CONCLUSION Digitization of facial defect models using various noncontact 3D digitizers appears to be feasible and is most accurate with laser beam light-sectioning technology. Further investigations assessing digitization of facial defects among patients are required to clinically verify the results of this study.
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Aswehlee AM, Hattori M, Elbashti ME, Sumita YI, Taniguchi H. Geometric Evaluation of the Effect of Prosthetic Rehabilitation on Facial Asymmetry in Patients with Unilateral Maxillectomy. INT J PROSTHODONT 2018; 31:228-235. [PMID: 29723316 DOI: 10.11607/ijp.5650] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
PURPOSE This study aimed (1) to geometrically evaluate areas of facial asymmetry in patients with two different types of maxillectomy defect compared to a control group, (2) to geometrically evaluate the effect of an obturator prosthesis on facial asymmetry, and (3) to investigate the correlation between three-dimensional (3D) deviation values and number of missing teeth. MATERIALS AND METHODS Facial data from 13 normal control participants and 26 participants with two types of maxillectomy defect (groups 1 and 2) were acquired with a noncontact 3D digitizer. Facial asymmetry was evaluated by superimposing a facial scan onto its mirror scan using 3D evaluation software. Facial scans with and without obturator prostheses were also superimposed to evaluate the obturator effect. The correlation between 3D deviation values and number of missing teeth was also evaluated. Statistical analyses were performed. RESULTS Facial asymmetry was significantly different between the control group and each maxillectomy defect group (group 1: P < .0001 and P = .020 without and with obturator, respectively; group 2: P < .0001 for both conditions). There were no significant differences in asymmetry between groups 1 and 2 either without or with obturator (P = .457 and P = .980, respectively). There was a significant difference in the obturator effect between groups 1 and 2 (P = .038). 3D deviation values were positively correlated with number of missing teeth in group 1 (r = 0.594, P = .032), but not in group 2. CONCLUSION A noncontact 3D digitizer and 3D deviation assessment were effective for analyzing facial data of maxillectomy patients. Obturators were effective for improving facial deformities in these patients.
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Elbashti ME, Aswehlee AM, Sumita YI, Hattori M, Taniguchi H. The Role of Portable Documentation Format in Three-Dimensional Interactive Visualization in Maxillofacial Prosthetics. INT J PROSTHODONT 2018; 31:399–400. [PMID: 29590664 DOI: 10.11607/ijp.5475] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Although digital technology has advanced the visualization of treatment planning and rehabilitation in prosthodontics, the field of maxillofacial prosthetics is in vital need of an accessible document for exchange of interactive three-dimensional (3D) model visualization without requiring installation of any additional software. This article introduces a 3D data documentation method for effective interactive digital visualization in maxillofacial prosthetics using a portable documentation format (PDF).
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Elbashti ME, Sumita YI, Hattori M, Aswehlee AM, Taniguchi H. Digitized Speech Characteristics in Patients with Maxillectomy Defects. J Prosthodont 2017; 28:649-655. [PMID: 29210525 DOI: 10.1111/jopr.12705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/28/2017] [Indexed: 11/30/2022] Open
Abstract
PURPOSE Accurate evaluation of speech characteristics through formant frequency measurement is important for proper speech rehabilitation in patients after maxillectomy. This study aimed to evaluate the utility of digital acoustic analysis and vowel pentagon space for the prediction of speech ability after maxillectomy, by comparing the acoustic characteristics of vowel articulation in three classes of maxillectomy defects. MATERIALS AND METHODS Aramany's classifications I, II, and IV were used to group 27 male patients after maxillectomy. Digital acoustic analysis of five Japanese vowels-/a/, /e/, /i/, /o/, and /u/-was performed using a speech analysis system. First formant (F1) and second formant (F2) frequencies were calculated using an autocorrelation method. Data were plotted on an F1-F2 plane for each patient, and the F1 and F2 ranges were calculated. The vowel pentagon spaces were also determined. One-way ANOVA was applied to compare all results between the three groups. RESULTS Class II maxillectomy patients had a significantly higher F2 range than did Class I and Class IV patients (p = 0.002). In contrast, there was no significant difference in the F1 range between the three classes. The vowel pentagon spaces were significantly larger in class II maxillectomy patients than in Class I and Class IV patients (p = 0.014). CONCLUSION The results of this study indicate that the acoustic characteristics of maxillectomy patients are affected by the defect area. This finding may provide information for obturator design based on vowel articulation and defect class.
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Affiliation(s)
- Mahmoud E Elbashti
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Yuka I Sumita
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Mariko Hattori
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Amel M Aswehlee
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Hisashi Taniguchi
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
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Sumita YI, Hattori M, Murase M, Elbashti ME, Taniguchi H. Digitised evaluation of speech intelligibility using vowels in maxillectomy patients. J Oral Rehabil 2017; 45:216-221. [PMID: 29205443 DOI: 10.1111/joor.12595] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/28/2017] [Indexed: 11/28/2022]
Abstract
Among the functional disabilities that patients face following maxillectomy, speech impairment is a major factor influencing quality of life. Proper rehabilitation of speech, which may include prosthodontic and surgical treatments and speech therapy, requires accurate evaluation of speech intelligibility (SI). A simple, less time-consuming yet accurate evaluation is desirable both for maxillectomy patients and the various clinicians providing maxillofacial treatment. This study sought to determine the utility of digital acoustic analysis of vowels for the prediction of SI in maxillectomy patients, based on a comprehensive understanding of speech production in the vocal tract of maxillectomy patients and its perception. Speech samples were collected from 33 male maxillectomy patients (mean age 57.4 years) in two conditions, without and with a maxillofacial prosthesis, and formant data for the vowels /a/,/e/,/i/,/o/, and /u/ were calculated based on linear predictive coding. The frequency range of formant 2 (F2) was determined by differences between the minimum and maximum frequency. An SI test was also conducted to reveal the relationship between SI score and F2 range. Statistical analyses were applied. F2 range and SI score were significantly different between the two conditions without and with a prosthesis (both P < .0001). F2 range was significantly correlated with SI score in both the conditions (Spearman's r = .843, P < .0001; r = .832, P < .0001, respectively). These findings indicate that calculating the F2 range from 5 vowels has clinical utility for the prediction of SI after maxillectomy.
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Affiliation(s)
- Y I Sumita
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - M Hattori
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - M Murase
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - M E Elbashti
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - H Taniguchi
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
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Kamarudin KH, Hattori M, Sumita YI, Taniguchi H. A chairside technique to add customized anterior acrylic resin teeth to a surgical obturator. J Prosthet Dent 2017; 119:852-854. [PMID: 28888415 DOI: 10.1016/j.prosdent.2017.06.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 06/01/2017] [Accepted: 06/02/2017] [Indexed: 11/29/2022]
Abstract
A surgical obturator may need to be modified during the healing process after tissue resection. Apart from relining the fitting surfaces to accommodate the healing wound and changes in the surrounding tissues, other modifications such as adding teeth are sometimes required to improve esthetics and speech. This article describes a chairside technique to add customized acrylic resin teeth to an existing surgical obturator.
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Affiliation(s)
- Kamarul Hisham Kamarudin
- Research student, Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan; and Restorative Dental Specialist, Ministry of Health, Malaysia
| | - Mariko Hattori
- Assistant Professor, Maxillofacial Prosthetics, Clinics for Oral and Maxillofacial Rehabilitation, Dental Hospital, Tokyo Medical and Dental University, Tokyo, Japan.
| | - Yuka I Sumita
- Junior Associate Professor, Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hisashi Taniguchi
- Professor, Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
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Elbashti ME, Hattori M, Patzelt SB, Schulze D, Sumita YI, Taniguchi H. Feasibility and Accuracy of Digitizing Edentulous Maxillectomy Defects: A Comparative Study. INT J PROSTHODONT 2017; 30:147-149. [PMID: 28267823 DOI: 10.11607/ijp.5095] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
PURPOSE The aim of this study was to evaluate the feasibility and accuracy of using an intraoral scanner to digitize edentulous maxillectomy defects. MATERIALS AND METHODS A total of 20 maxillectomy models with two defect types were digitized using cone beam computed tomography. Conventional and digital impressions were made using silicone impression material and a laboratory optical scanner as well as a chairside intraoral scanner. The 3D datasets were analyzed using 3D evaluation software. RESULTS Two-way analysis of variance revealed no interaction between defect types and impression methods, and the accuracy of the impression methods was significantly different (P = .0374). CONCLUSION Digitizing edentulous maxillectomy defect models using a chairside intraoral scanner appears to be feasible and accurate.
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Yanagi A, Murase M, Sumita YI, Taniguchi H. Investigation of nutritional status using the Mini Nutritional Assessment-Short Form and analysis of the relevant factors in patients with head and neck tumour. Gerodontology 2016; 34:227-231. [DOI: 10.1111/ger.12253] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/03/2016] [Indexed: 11/29/2022]
Affiliation(s)
- Ayaka Yanagi
- Department of Maxillofacial Prosthetics; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University (TMDU); Tokyo Japan
| | - Mai Murase
- Department of Maxillofacial Prosthetics; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University (TMDU); Tokyo Japan
| | - Yuka I. Sumita
- Department of Maxillofacial Prosthetics; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University (TMDU); Tokyo Japan
| | - Hisashi Taniguchi
- Department of Maxillofacial Prosthetics; Graduate School of Medical and Dental Sciences; Tokyo Medical and Dental University (TMDU); Tokyo Japan
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Sumita YI, Hattori M, Elbashti ME, Taniguchi H. Orientation of handle for successful prosthetic treatment in patients with an anatomic compromise after a maxillectomy. J Prosthet Dent 2016; 117:694-696. [PMID: 27881314 DOI: 10.1016/j.prosdent.2016.08.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 08/07/2016] [Accepted: 08/08/2016] [Indexed: 10/20/2022]
Abstract
This clinical technique provides a key procedure for successful prosthetic treatment in patients with an anatomical compromise after a maxillectomy. When making a preliminary impression, the clinician must keep the handle of the stock tray parallel to the patient's interpupillary line extraorally to maintain the correct position of the tray and to make a record of the inclination of the occlusal plane. This simple consideration during this first step of making a preliminary impression can be an important guide for both dentists and dental technicians. Information about the correct positioning of the tray and the inclination of the occlusal plane obtained by using a stock tray handle will greatly reduce the stress experienced by dentists, dental technicians, and patients during the fabrication of the prosthesis and will ultimately lead to successful prosthetic treatment in patients with anatomic compromise resulting from a maxillectomy.
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Affiliation(s)
- Yuka I Sumita
- Junior Associate Professor, Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
| | - Mariko Hattori
- Assistant Professor, Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Mahmoud E Elbashti
- Lecturer, Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hisashi Taniguchi
- Professor, Department of Maxillofacial Prosthetics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
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Elbashti ME, Sumita YI, Aswehlee AM, Haraguchi M, Otomaru T, Hattori M, Taniguchi H. Preschool and School Phases of Postmaxillectomy Prosthetic Rehabilitation in a Child: A Clinical Report. J Prosthodont 2016; 27:482-487. [PMID: 27696598 DOI: 10.1111/jopr.12514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/23/2016] [Indexed: 11/28/2022] Open
Abstract
This report describes the postmaxillectomy prosthetic rehabilitation of a child with maxillary chondrosarcoma over an 8-year period. Specifically, it (1) describes the planning and rehabilitation procedures carried out during the period from before the operation to the time when the patient started elementary school and (2) reports the results of evaluations of the patient's oral and psychosocial function conducted during the school phase. The prosthetic treatment plan was separated into two phases (the preschool and school phases) and was started prior to surgery, when an immediate surgical obturator was designed by the surgeons. After the operation, it was considered important to provide the patient and her mother with training regarding how the defect should be cleaned, trismus prevention, and how the prosthesis should be fitted. In addition, esthetic improvements and the ability to speak clearly were also targeted during treatment planning. After surgery, obturators were fabricated in a conventional manner and fitted at the ages of 2, 4, 6, 8, and 10 years. The patient's oral function during the use of the obturators was evaluated objectively. Marked improvements in oral function were seen during both treatment phases. The patient's ability to perform psychosocial functions at school also improved during the use of the obturators.
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Affiliation(s)
- Mahmoud E Elbashti
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Yuka I Sumita
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Amel M Aswehlee
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Mihoko Haraguchi
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Takafumi Otomaru
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Mariko Hattori
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hisashi Taniguchi
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
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Hattori M, Sumita YI, Elbashti ME, Kurtz KS, Taniguchi H. Effect of Experimental Palatal Prosthesis on Voice Onset Time. J Prosthodont 2016; 27:223-226. [PMID: 27482952 DOI: 10.1111/jopr.12494] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/21/2016] [Indexed: 11/29/2022] Open
Abstract
PURPOSE Objective evaluation of a patient's speech is needed in prosthetic dentistry because the prostheses can affect the intelligibility of speech. Measurement of voice onset time is one evaluation method of consonant production used in phonetic science. The purpose of this study was to confirm the influence of a palatal prosthesis on consonant production by measuring voice onset time. MATERIALS AND METHODS In this study, voice onset time was measured in 10 healthy women (mean age 26.5 years) under two conditions: with and without an experimental palatal prosthesis. In this study, voice onset time of /ta/ and /ka/ were used to determine the effect of wearing a palatal prosthesis; /pa/ was tested as a control, with the null hypothesis that voice onset time of /ta/ and /ka/ would not change when wearing a palatal prosthesis. RESULTS Medial voice onset time of /pa/, /ta/, and /ka/ syllables without the palatal prosthesis was 22.5 ms, 19.5 ms, and 42.5 ms, whereas that with the palatal prosthesis was 22.5 ms, 23.5 ms, and 55.0 ms. Voice onset times for /ta/ and /ka/ were prolonged when wearing the experimental palatal prosthesis, whereas /pa/ showed no significant difference. CONCLUSION Consonant production was affected by wearing a palatal prosthesis, and this change in sound was detected by measuring voice onset time.
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Affiliation(s)
- Mariko Hattori
- Clinic for Maxillofacial Prosthetics, University Hospital, Faculty of Dentistry Tokyo Medical and Dental University (TMDU), Bunkyo, Japan
| | - Yuka I Sumita
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Bunkyo, Japan
| | - Mahmoud E Elbashti
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Bunkyo, Japan
| | - Kenneth S Kurtz
- Division of Maxillofacial Prosthetics, Stony Brook University School of Dental Medicine, Stony Brook, NY
| | - Hisashi Taniguchi
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Bunkyo, Japan
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Otomaru T, Sumita YI, Aimaijiang Y, Munakata M, Tachikawa N, Kasugai S, Taniguchi H. Rehabilitation of a Bilateral Maxillectomy Patient with a Free Fibula Osteocutaneous Flap and with an Implant-Retained Obturator: A Clinical Report. J Prosthodont 2015. [DOI: 10.1111/jopr.12319] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Affiliation(s)
- Takafumi Otomaru
- Department of Maxillofacial Prosthetics; Tokyo Medical and Dental University; Tokyo Japan
| | - Yuka I. Sumita
- Department of Maxillofacial Prosthetics; Tokyo Medical and Dental University; Tokyo Japan
| | - Yiliyaer Aimaijiang
- Department of Maxillofacial Prosthetics; Tokyo Medical and Dental University; Tokyo Japan
| | - Motohiro Munakata
- Department of Prosthodontic Dentistry for Function of TMJ and Occlusion; Kanagawa Dental University; Kanagawa Japan
| | - Noriko Tachikawa
- Department of Oral Implantology and Regenerative Dental Medicine; Tokyo Medical and Dental University; Tokyo Japan
| | - Shohei Kasugai
- Department of Oral Implantology and Regenerative Dental Medicine; Tokyo Medical and Dental University; Tokyo Japan
| | - Hisashi Taniguchi
- Department of Maxillofacial Prosthetics; Tokyo Medical and Dental University; Tokyo Japan
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Elbashti ME, Hattori M, Sumita YI, Taniguchi H. Evaluation of articulation simulation system using artificial maxillectomy models. J Oral Rehabil 2015; 42:678-84. [PMID: 25975670 DOI: 10.1111/joor.12306] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/18/2015] [Indexed: 10/23/2022]
Abstract
Acoustic evaluation is valuable for guiding the treatment of maxillofacial defects and determining the effectiveness of rehabilitation with an obturator prosthesis. Model simulations are important in terms of pre-surgical planning and pre- and post-operative speech function. This study aimed to evaluate the acoustic characteristics of voice generated by an articulation simulation system using a vocal tract model with or without artificial maxillectomy defects. More specifically, we aimed to establish a speech simulation system for maxillectomy defect models that both surgeons and maxillofacial prosthodontists can use in guiding treatment planning. Artificially simulated maxillectomy defects were prepared according to Aramany's classification (Classes I-VI) in a three-dimensional vocal tract plaster model of a subject uttering the vowel /a/. Formant and nasalance acoustic data were analysed using Computerized Speech Lab and the Nasometer, respectively. Formants and nasalance of simulated /a/ sounds were successfully detected and analysed. Values of Formants 1 and 2 for the non-defect model were 675.43 and 976.64 Hz, respectively. Median values of Formants 1 and 2 for the defect models were 634.36 and 1026.84 Hz, respectively. Nasalance was 11% in the non-defect model, whereas median nasalance was 28% in the defect models. The results suggest that an articulation simulation system can be used to help surgeons and maxillofacial prosthodontists to plan post-surgical defects that will be facilitate maxillofacial rehabilitation.
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Affiliation(s)
- M E Elbashti
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - M Hattori
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Y I Sumita
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - H Taniguchi
- Department of Maxillofacial Prosthetics, Graduate School, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
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Hattori M, Sumita YI, Taniguchi H. Sound Analysis of a Musical Performance to Evaluate Prosthodontic Treatment for a Clarinet Player. J Prosthodont 2014; 24:71-7. [DOI: 10.1111/jopr.12166] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/13/2013] [Indexed: 11/28/2022] Open
Affiliation(s)
- Mariko Hattori
- Clinics for Oral and Maxillofacial Rehabilitation; Faculty of Dentistry, University Hospital; Tokyo Medical and Dental University; Tokyo Japan
| | - Yuka I. Sumita
- Department of Maxillofacial Prosthetics; Graduate School; Tokyo Medical and Dental University; Tokyo Japan
| | - Hisashi Taniguchi
- Department of Maxillofacial Prosthetics; Graduate School; Tokyo Medical and Dental University; Tokyo Japan
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