International Journal of Maxillofacial Prosthetics最新文献

{"title":"Three-dimensional printed immediate surgical obturator before maxillectomy: A pilot study","authors":"Mayalen Dartaguiette, M. Elbashti, Paul Girardeau, F. Jacob, M. Laurentjoye, A. Naveau","doi":"10.26629/IJMP.2021.04","DOIUrl":"https://doi.org/10.26629/IJMP.2021.04","url":null,"abstract":"Purpose: Surgical obturators improve patients’ quality of life after maxillectomy by maintaining oral functions. As digital workflows are commonly used for planning maxillofacial surgeries and prostheses, the hypothesis of this study was that the fabrication of the immediate surgical obturator could benefit from the currently available open-source software. The aim of this study was to develop a protocol for fabricating before the surgery a prefabricated, personalized, and lightweight immediate surgical obturator with open-source software and limited amount of relining material. Materials and methods: The protocol steps consisted of digital simulation of maxillectomy defect based on CBCT segmentation of cadavers’ heads according to the surgical planning. Design of immediate surgical obturator by boolean subtraction tools using open-source software, scaling down the final designed immediate surgical obturator to 90%, and then 3D-printing it layer by layer in biocompatible resin to be relined and fitted intraorally after surgery. Results: The developed protocol was successfully achieved. Maxillectomy defect interest areas were successfully segmented using open-source software. Immediate surgical obturator was also successfully designed and 3D printed using biocompatible resin materials. The immediate surgical obturator was thus adapted to the defect with limited amount of relining material. Conclusions: This innovative method could give the patient an opportunity to benefit from a personalized, biocompatible and lightweight immediate surgical obturator. (Int J Maxillofac Prosthetics 2021;4:18-24)","PeriodicalId":232217,"journal":{"name":"International Journal of Maxillofacial Prosthetics","volume":"511 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116205488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of xerostomia and effect of maxillofacial prosthesis use on mouth dryness in head and neck tumor patients","authors":"Ayako Kanazaki, Jun Hu, T. Otomaru, Y. Sumita","doi":"10.26629/IJMP.2021.03","DOIUrl":"https://doi.org/10.26629/IJMP.2021.03","url":null,"abstract":"Purpose: Xerostomia is a symptom of reduced oral functioning and can cause dysphagia and worsen dental disease. This study sought to investigate the actual status of xerostomia in head and neck tumor patients and the beneficial effects of maxillofacial prosthesis use on xerostomia. Materials and Methods: We conducted a questionnaire survey on xerostomia and measured resting salivary flow rate and oral mucosa moisture levels in 26 patients who had been treated for head and neck tumor. Results: After treatment, 16 of the 26 patients (62%) reported experiencing dry mouth. Moreover, 12 patients (46%) reported a tendency for dry mouth compared with before tumor treatment, indicating they perceived worsening of xerostomia after treatment. Mean resting salivary flow rate measured by the cotton roll method was 0.183 ± 0.178 g over 30 seconds. Resting salivary flow rate was significantly lower in patients who reported always having dry mouth than in those who did not report experiencing dry mouth. Patients who had been treated for mandibular/lingual tumors had a significantly lower resting salivary flow rate than those who had been treated for maxillary tumors. Mean moisture content in the oral mucosa measured with an oral moisture checker was 27.6 ± 1.6. Those who reported always having dry mouth had significantly lower oral mucosa moisture content than those who reported having dry mouth sometimes/a little. Five patients reported that wearing a maxillofacial prosthesis alleviated dry mouth. Conclusion: This study demonstrated that the maxillofacial prosthesis use can improve xerostomia after head and neck tumor treatment. (Int J Maxillofac Prosthetics 2021;4:9-17)","PeriodicalId":232217,"journal":{"name":"International Journal of Maxillofacial Prosthetics","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125586998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Piezography approach to denture fabrication for a partial glossectomy patient: A clinical report","authors":"Shataer Awuti, Tong-Mei Wang, N. Ariani, A. Naveau, E. Somogyi-Ganss, M. Hattori, Y. Sumita","doi":"10.26629/IJMP.2021.06","DOIUrl":"https://doi.org/10.26629/IJMP.2021.06","url":null,"abstract":"To provide a mandibular complete denture for a patient with a partial glossectomy and partial mandibulectomy, the denture space was captured using a piezography technique involving silicone impression materials with two different viscosities. Artificial teeth were arranged within the obtained piezographic index, and the denture was processed in the conventional manner. Using the piezography technique described enables physiologically appropriate complete dentures to be fabricated based on the neutral zone concept. (Int J Maxillofac Prosthetics 2021;4:37-42)","PeriodicalId":232217,"journal":{"name":"International Journal of Maxillofacial Prosthetics","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121150703","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Use of digital technologies in maxillofacial prosthetics in Japan","authors":"M. Elbashti, Y. Sumita, M. Hattori, A. Aswehlee, H. Taniguchi","doi":"10.26629/IJMP.2021.05","DOIUrl":"https://doi.org/10.26629/IJMP.2021.05","url":null,"abstract":"Purpose: This study investigated the use of digital technology in maxillofacial prosthetics among practitioners involved in maxillofacial prosthetic rehabilitation in Japan. Materials and Methods: A self-administered survey questionnaire with 24 closed-ended and multiple choice questions was used. A total of 300 questionnaires were distributed at the 32nd meeting of the Japanese Academy of Maxillofacial Prosthetics that was held in Tokyo, Japan in June 2015. The survey questionnaire was distributed in a pack that included an introduction letter explaining the research aims, objectives, and informed consent. The data obtained were analyzed by descriptive statistical methods and reported as frequency and range. Results: In total, 105 respondents (77 men (73.4%), 28 women (26.6%); median age, 40 years; age range 21-66 years) completed the questionnaire (response rate, 35%). The majority of respondents were dentists (75.2%), followed by dental technicians (21.9%). The median duration of work experience for the respondents in their specialty was 14 years, and 97% of respondents had interested and adopted digital technologies in maxillofacial prosthetics. Digital technologies were used significantly in patient and practice management, diagnostic, and patient’s defect visualization (p < 0.001) but insignificant in treatment planning (p = 0.917). In contrast, there were significant increases in non-use of digital technologies in prosthesis design, prosthesis manufacturing, and patient and prosthesis evaluation (p < 0.001). Conclusion: Japanese dental practitioners are interested and willing to use digital technology in maxillofacial prosthetics. Most respondents use some or a substantial number of digital technologies in clinical practice. (Int J Maxillofac Prosthetics 2021;4:25-36)","PeriodicalId":232217,"journal":{"name":"International Journal of Maxillofacial Prosthetics","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124585146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Maxillofacial Prosthodontics during a pandemic","authors":"C. Nguyen","doi":"10.26629/IJMP.2021.01","DOIUrl":"https://doi.org/10.26629/IJMP.2021.01","url":null,"abstract":"I am writing this as we have just started 2021. What a year 2020 has been! Social distancing restrictions, dental office closures, limited access to PPE still occurring in certain areas, and very strict and slow reopening rules for dental clinics worldwide as we now tackle the 2nd or 3rd wave of the pandemic. Last year has brought many challenges to all of us. Maxillofacial prosthodontists in particular have been in a very unique position during this pandemic compared to some of our dental colleagues: with many of us being affiliated to hospitals meant that we were often deemed front line essential workers. We witnessed the struggles of our patients as many head and neck surgeries were being postponed or canceled due to the risk of contamination or due to of lack of ventilators. We needed to contact colleagues to refer patients that were suddenly unable to cross borders to continue their ongoing care. We found new ways to teach dental students and prosthodontics residents remotely while becoming pioneers in adapting dental offices to the new reality of covid-19. \u0000 What we have learned during this last year, is that unfortunately nobody was prepared for a pandemic. It has shown us how fragile our entire system was, but also how resilient and adaptable we could be. Many prosthodontics organizations embraced social distancing and created faster communication pathways to their members to provide them with timely information on how to best navigate this change of events. They shared ideas on how to facilitate teledentistry, discussed how to install proper infection control measures, helped members navigate business interruptions, and compared international guidelines regarding various stages of reopening. Witnessing this sharing of material and cooperation between organizations that had not normally communicated with one another has been heartwarming. \u0000This pandemic has had devastating impacts worldwide, but it has also shown us how we could adapt to new changes quickly and allowed us to learn many lessons along the way. We continued to perform research to improve the quality of life of our patients as seen in the article: \"Evaluation of xerostomia and effect of maxillofacial prosthesis use on mouth dryness in head and neck tumor patients\", and developed new teaching methods for taking advantage of the capabilities of 3D scanning and rendering. These new techniques often translated into innovations in practice as we embraced this new digital world, as described in \"Three-dimensional printing immediate surgical obturator before maxillectomy: A pilot study\". Both articles are published in our 2021 issue of the International Journal of Maxillofacial Prosthetics. I am confident we will come out of this pandemic stronger as we re-engineer the future of maxillofacial prosthodontics so that our profession not only survives these challenges, but thrives from everything we have learned and accomplished.","PeriodicalId":232217,"journal":{"name":"International Journal of Maxillofacial Prosthetics","volume":"109 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134532351","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surface electromyography and mandibular motion recording input in prosthetic rehabilitation of segmental mandibulectomy: The MAC2 protocol","authors":"Florent Destruhaut, C. Rignon-Bret, Antoine Dubuc, P. Pomar, Antonin Hennequin, J. Combadazou, A. Naveau","doi":"10.26629/ijmp.2021.08","DOIUrl":"https://doi.org/10.26629/ijmp.2021.08","url":null,"abstract":"Lateral segmental mandibulectomy can be associated with sequelae, such as mouth opening limitation and mandibular deviation, that lead to altered oral functions (chewing, swallowing, speech) and complex prosthetic management. The authors present a new protocol for surface electromyography (sEMG) and mandibular motion recording to help clinicians with decision-making and dental prosthetic treatment planning for segmental mandibulectomy. The clinical case of a patient with a reconstructed titanium endoprosthesis is presented. The MAC2 protocol is used and consists of chronologically performing various recordings by using a device for sEMG and mandibular tracking. During the orofacial reeducation and dental prosthetic reconstruction, three therapeutic steps can benefit from the MAC2 protocol: to analyze the initial muscular imbalance, to provide guidance in the choice of maxillomandibular relationship and to quantify the functional improvement. sEMG of masticatory muscles is a useful diagnostic tool in a context of mandibular kinematic disorders and the MAC2 protocol adds some guidance for dental prosthetic rehabilitation in the context of segmental mandibulectomy. (Int J Maxillofac Prosthetics 2021;4:47-54)","PeriodicalId":232217,"journal":{"name":"International Journal of Maxillofacial Prosthetics","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127544007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Two-step fabrication of an obturator prosthesis for a large maxillary defect with digital speech analysis: A case report","authors":"Yujia Wang, M. Hattori, P. Garg, C. Wesemann, T. Ariff, Cristian Lagos Fredes, Y. Sumita","doi":"10.26629/IJMP.2020.07","DOIUrl":"https://doi.org/10.26629/IJMP.2020.07","url":null,"abstract":"This report describes the prosthetic rehabilitation of a patient with a large maxillary defect. It is often risky and difficult to take an impression of a large defect in a single-step procedure. In this study, we present a clinical technique where the maxillary obturator prosthesis was fabricated by combining two methods: conventional processing using an impression followed by relining of the obturator part to improve retention and support of the prosthesis. This report also describes how digital speech analysis using formants of five vowels can be utilized during the relining and adjustment step, resulting in improved patient satisfaction and comfort. (Int J Maxillofac Prosthetics 2020;3:32-36)","PeriodicalId":232217,"journal":{"name":"International Journal of Maxillofacial Prosthetics","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117264627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A technique of speech aid adjustment with the assistance of nasalance values for non-nasal and nasal sounds","authors":"Yinan Liu, M. Hattori, Y. Sumita","doi":"10.26629/IJMP.2020.05","DOIUrl":"https://doi.org/10.26629/IJMP.2020.05","url":null,"abstract":"Evaluation of speech function is essential to maxillofacial prosthetic treatment. Measurement of nasalance with a nasometer is practical and typically done to detect hypernasality in maxillofacial defect patients. This case report describes a nasalance test used in the evaluation and rehabilitation of a patient who needed a speech aid. A 70-year-old man sought help at our clinic because his old speech aid had broken. Although a new speech aid was fabricated, he continued to have difficulty speaking and breathing. A nasalance test using nasal and non-nasal test words revealed hyponasality. The patient was satisfied with the speech aid after its adjustment in accordance with the nasalance test results. Nasalance testing that considers not only hypernasality but hyponasality helped the maxillofacial prosthodontist in the successful rehabilitation of this maxillofacial defect patient. (Int J Maxillofac Prosthetics 2020;3:23-27)","PeriodicalId":232217,"journal":{"name":"International Journal of Maxillofacial Prosthetics","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123344009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The first biennial international workshop for Young Maxillofacial Prosthetic Educators (yMPE)","authors":"M. Elbashti","doi":"10.26629/IJMP.2020.02","DOIUrl":"https://doi.org/10.26629/IJMP.2020.02","url":null,"abstract":"fascination, a reputation for uniqueness, and a city of modern boldness merged with traditions, took place the first biennial Young Maxillofacial Prosthodontics Educators workshop. It was held March 5-8, 2019 at the Tokyo Medical and Dental University (TMDU) (Fig. 1) and was organized by the Department of Maxillofacial Prosthetics of TMDU. The workshop was supported by an education grant funded by the Education and Research Foundation of the International College of Prosthodontists (ICP) and sponsored by the International Journal of Maxillofacial Prosthetics (iJMP).","PeriodicalId":232217,"journal":{"name":"International Journal of Maxillofacial Prosthetics","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134580216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thresholds of perceivable color difference in silicone: A pilot study","authors":"Lindsay D McHutchion, Linping Zhao, S. Dixon, R. Seelaus","doi":"10.26629/IJMP.2020.04","DOIUrl":"https://doi.org/10.26629/IJMP.2020.04","url":null,"abstract":"Purpose: The relationship of instrument measured color difference to observer perception of color difference is not currently well-defined in applications related to color for facial prosthetic devices. Determining the threshold of perceivable color difference (∆E) in silicone will improve the quality of patient treatment and allow for better applications of technology in the production of facial prostheses. The purpose of this study is to determine the threshold of perceivable color difference in silicone and to examine if this threshold varies with light versus dark colors, and/or among three different observer groups. Material and Methods: Two sets of 40 silicone samples (one simulating light skin and one simulating dark skin) were compared to one standard sample. Sample color was measured using a portable spectrophotometer, and ∆E values between each sample and a standard sample were calculated (Commission Internationale de l’Eclairage CIE (L*a*b*)). Samples were shown to 29 subjects from three groups (12 professionals who work with color, 6 patients with a facial prosthesis, and 11 laypeople) in random order next to a standard sample under controlled viewing conditions. Subjects were asked “Do these samples appear to be the same color?†and responses were analyzed to calculate the ∆E value of the threshold of perceivable color difference in silicone for each subject. Subject thresholds were used to determine average thresholds for each subject group, and for all participants. Results: No significant difference in the thresholds of perceivable color difference among the three subject groups, or between light and dark sample sets was found. ∆E = 1.025 was calculated as the average threshold of perceivable color difference. Conclusion: The results of this study indicate that ∆E = 1.0 can be used as a threshold of perceivable color difference in silicone used in facial prosthesis fabrication. Understanding this threshold will be useful in evaluating and integrating technology into the color-matching process of prosthesis production. It can also be used as a clinical standard for color difference comparisons and quality control in prosthetic outcomes. (Int J Maxillofac Prosthetics 2020;3:12-22)","PeriodicalId":232217,"journal":{"name":"International Journal of Maxillofacial Prosthetics","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126956586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}