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Moral Nakamura D, da Graça Pinto H, Baena Elchin C, Thomazotti Berard L, Abreu Alves F, Azeredo Alves Antunes L, Pena Coto N. Efficacy of bethanechol chloride in the treatment of radiation-induced xerostomia in patients with head and neck cancer: A systematic review and meta-analysis. Radiother Oncol 2023; 186:109715. [PMID: 37207874 DOI: 10.1016/j.radonc.2023.109715] [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] [Received: 10/03/2022] [Revised: 05/09/2023] [Accepted: 05/11/2023] [Indexed: 05/21/2023]
Abstract
BACKGROUND AND PORPUSE Salivary glands sustain collateral damage following radiotherapy (RT) to treat cancers of the head and neck, leading to complications, including xerostomia and hyposalivation. This systematic review (SR) with meta-analysis was performed to determine the effectiveness of bethanechol chloride in preventing salivary gland dysfunction in this context. MATERIALS AND METHODS Medline/Pubmed, Embase, Scopus, LILACS via Portal Regional BVS and Web of Science were searched electronically in accordance with the Cochrane manual and reported PRISMA guidelines. RESULTS 170 patients from three studies were included. Results from the meta-analysis suggest that bethanechol chloride is associated with increases in: whole stimulating saliva (WSS) after RT (Std. MD 0.66, 95% CI 0.28 to 1.03, P < 0.001); whole resting saliva (WRS) during RT (Std. MD 0.4, 95% CI 0.04 to 0.76, P = 0.03); and WRS after RT (Std. MD 0.45, 95% CI 0.04 to 0.86, P = 0.03). CONCLUSION The present study suggests that bethanechol chloride therapy may be effective in patients with xerostomia and hyposalivation.
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Affiliation(s)
- Denise Moral Nakamura
- School of Dentistry, University of Sao Paulo, Av. Prof. Lineu Prestes, 2227, 05508-900 São Paulo, SP, Brazil.
| | - Henrique da Graça Pinto
- School of Dentistry, University of Sao Paulo, Av. Prof. Lineu Prestes, 2227, 05508-900 São Paulo, SP, Brazil.
| | - Cintia Baena Elchin
- School of Dentistry, University of Sao Paulo, Av. Prof. Lineu Prestes, 2227, 05508-900 São Paulo, SP, Brazil.
| | - Lucas Thomazotti Berard
- School of Dentistry, University of Sao Paulo, Av. Prof. Lineu Prestes, 2227, 05508-900 São Paulo, SP, Brazil.
| | - Fabio Abreu Alves
- School of Dentistry, University of Sao Paulo, Av. Prof. Lineu Prestes, 2227, 05508-900 São Paulo, SP, Brazil.
| | - Lívia Azeredo Alves Antunes
- School of Dentistry, Fluminense Federal University, R. Dr. Silvio Henrique Braune, 22, 28625-650 Nova Friburgo, RJ, Brazil.
| | - Neide Pena Coto
- School of Dentistry, University of Sao Paulo, Av. Prof. Lineu Prestes, 2227, 05508-900 São Paulo, SP, Brazil.
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Dos Santos RLO, Elchin CB, Guiguer-Pinto VA, Vasconcelos DDM, Ferreira MD, Dias RB, Sugaya NN, Paula CR, Coto NP. Diagnosis, treatment and maxillofacial rehabilitation in rhinocerebral mucormycosis patient: A case report and review of the literature. J Mycol Med 2021; 32:101211. [PMID: 34763149 DOI: 10.1016/j.mycmed.2021.101211] [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: 12/22/2020] [Revised: 09/22/2021] [Accepted: 10/08/2021] [Indexed: 11/16/2022]
Abstract
Mucormycosis is an aggressive, rare and opportunistic infectious disease, with a high mortality rate. Etiologic agents are filamentous fungi, and infection among humans normally occurs through spore inhalation. A 61-year-old male individual, presenting left eye amaurosis, dark epistaxis, hyperalgesia and malodor underwent clinical examination, which detected ulcerative lesion and wide bone exposure in the hard palate and alveolar ridge. Direct microbiological examination, microbiological culture and lesion biopsy were performed. Non-septate smooth fungal hyphae forming right angles with each other were observed through the direct microbiological examination. Microbiological culture revealed fast-growing fungal colonies with cottony texture, identified as Rhizopus sp. Histopathological examination exhibited necrosis areas, intense mononuclear inflammatory infiltrate and bulky hyphae, thus concluding the mucormycosis diagnosis. Amphotericin B antifungal therapy and surgical intervention were adopted as treatment. The patient was then rehabilitated with maxillofacial prosthesis, subsequently to the healing of the surgical wound.
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Affiliation(s)
| | - Cintia Baena Elchin
- Department of Maxillofacial Surgery, Prosthetics and Traumatology, School of Dentistry - University of São Paulo, Av. Lineu Prestes, São Paulo 2227, Brazil
| | - Vítor Ancheschi Guiguer-Pinto
- Department of Maxillofacial Surgery, Prosthetics and Traumatology, School of Dentistry - University of São Paulo, Av. Lineu Prestes, São Paulo 2227, Brazil
| | | | - Maurício Domingues Ferreira
- Department of Dermatology, School of Medicine - University of São Paulo, Av. Dr. Arnaldo, São Paulo 455, Brazil
| | - Reinaldo Brito Dias
- Department of Maxillofacial Surgery, Prosthetics and Traumatology, School of Dentistry - University of São Paulo, Av. Lineu Prestes, São Paulo 2227, Brazil
| | - Norberto Nobuo Sugaya
- Department of Stomatology, School of Dentistry - University of São Paulo, Av. Lineu Prestes, São Paulo 2227, Brazil
| | - Claudete Rodrigues Paula
- Department of Stomatology, School of Dentistry - University of São Paulo, Av. Lineu Prestes, São Paulo 2227, Brazil
| | - Neide Pena Coto
- Department of Maxillofacial Surgery, Prosthetics and Traumatology, School of Dentistry - University of São Paulo, Av. Lineu Prestes, São Paulo 2227, Brazil
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Padilha ACL, Constante HM, Fronza HP, Coto NP. Orofacial trauma and mouthguard use in Brazilian rugby union players. Dent Traumatol 2020; 37:53-57. [PMID: 32794620 DOI: 10.1111/edt.12592] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Revised: 07/29/2020] [Accepted: 07/30/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND/AIM Rugby union represents a high-risk sport for orofacial trauma due to its impact collisions and repetitive tackles. The aim of this study was to investigate the prevalence of orofacial trauma according to mouthguard use among a sample of Brazilian rugby union players. METHODS An online questionnaire was sent to the 16 best rugby union clubs in Brazil. The questionnaire contained questions about the training history of each athlete, prevalence of orofacial trauma, and details about mouthguard use. Only participants who reported using a mouthguard were selected for this analysis. RESULTS A total of 244 individuals were included. The prevalence of orofacial trauma was 34.4%, and 61.9% of them did not wear a mouthguard at the time of the incident. The only type of mouthguard reported was the pre-fabricated ("boil and bite" and "ready-to-wear") type. A stronger association was observed between the reason for using a mouthguard and the outcome, whereas a lower proportion of trauma was observed among individuals who claimed mandatory mouthguard use at the gym/sport (20.0%). Time since the respondent started playing rugby union and who instructed them to use a mouthguard were not associated with orofacial trauma. CONCLUSION Prevalence of orofacial trauma was high among this sample of rugby union players from Brazil, even with the use of pre-fabricated mouthguards. This study encourages further investigation on the use of custom-made mouthguards in rugby union and the role of coach/physical educators to reduce the prevalence of orofacial trauma.
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Affiliation(s)
| | - Helena Mendes Constante
- Graduate Program in Public Health, Federal University of Santa Catarina, Florianopolis, Brazil
| | - Helena Pickler Fronza
- Graduate Program of Dentistry, Federal University of Santa Catarina, Florianopolis, Brazil
| | - Neide Pena Coto
- Department of Maxillofacial Surgery, Prosthetics and Traumatology, Division of Maxillofacial Prosthesis/Sports Dentistry, School of Dentistry, University of Sao Paulo, Sao Paulo, Brazil
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Fronza HP, Stolf SC, Taguchi CMC, Coto NP, Padilha ACL. Determinants for traumatic orofacial injuries in sport: Extrinsic factors in a scoping review. Dent Traumatol 2020; 36:598-606. [PMID: 32790910 DOI: 10.1111/edt.12597] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 06/22/2020] [Accepted: 06/23/2020] [Indexed: 11/27/2022]
Abstract
BACKGROUND/AIM Sports practices carry a risk for orofacial injuries and, to avoid them, preventive measures are necessary. The aim of this study was to investigate a web of extrinsic determinants for orofacial trauma in sports. MATERIALS AND METHODS Through a scoping review, eight extrinsic risk factors for sports-related orofacial trauma emerged from the thematic analysis. These were sports modality, sports philosophy, competition rules, level of competition, accessory equipment, environmental conditions, acting regimen, pitch conditions, and human resources. The data collection was conducted on seven databases, using terms based on health science descriptors and keywords related to orofacial trauma and sports. RESULTS From the 1155 articles found, 157 were selected based on eligibility criteria and classified according to the mentioned factors. After the full reading of the articles, the most cited risk factor was sports modality while acting regimen and environmental factors were the least mentioned. Therefore, a scheme following the web of determinants was constructed with the purpose of establishing a risk profile, which was based on the interactions between the determinants and on the frequency that they were mentioned as contributors to injury. From this, it was observed that each traumatic event is possibly a result of the interrelationships among the eight suggested determinants. CONCLUSION Sports modality was the most cited extrinsic determinant observed in the literature, while environmental conditions and acting regimen were the least cited. In addition, more than establishing the determinants, it is necessary to comprehend how they relate, once preventive strategies should intercede on these relations, to help reduce sports injuries.
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Affiliation(s)
- Helena Pickler Fronza
- Graduate Program of Dentistry, Federal University of Santa Catarina, Florianopolis, Brazil
| | | | | | - Neide Pena Coto
- Division of Maxillofacial Prosthesis/Sports Dentistry, Department of Maxillofacial Surgery, Prosthetics and Traumatology, School of Dentistry, University of Sao Paulo, Sao Paulo, Brazil
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Dos Santos RLO, Sarra G, Lincopan N, Petri DFS, Aliaga J, Marques MM, Dias RB, Coto NP, Sugaya NN, Paula CR. Preparation, Antimicrobial Properties, and Cytotoxicity of Acrylic Resins Containing Poly(diallyldimethylammonium chloride). INT J PROSTHODONT 2020; 34:635–641. [PMID: 32589001 DOI: 10.11607/ijp.6506] [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 design and analyze the biologic properties (antibacterial and antifungal, as well as cytotoxicity) of a dental biomaterial based on incorporation of the biocide poly(diallyldimethylammonium chloride) (PDADMAC) into the masses of self- and thermopolymerizable acrylic resins. MATERIALS AND METHODS PDADMAC was diluted into tetrahydrofuran (4 wt%) and incorporated into self- and thermopolymerizable acrylic resins. PDADMAC inclusion was verified by measuring the contact angle with water droplets. Plain resins were used as controls. The antibacterial activity was evaluated against Staphylococcus aureus (ATCC 6538P) and Escherichia coli (ATCC 8739), and the antifungal activity was tested against Candida albicans (ATCC 10231) and Aspergillus niger (ATCC 16404). The cytotoxicity of substances leached from these materials was analyzed in human dental pulp stem cells using MTT reduction assay. RESULTS Reduction of contact angle confirmed the incorporation of PDADMAC in the resins. Both resins containing PDADMAC were more effective against Gram-positive and Gram-negative bacteria than their controls. The modified resins were also significantly more effective against Candida albicans than controls, but no resin was effective against Aspergillus niger. The cell viability of cultures submitted to substances leached from the PDADMAC resins was similar to that of cells cultured under ideal conditions. CONCLUSION The incorporation of PDADMAC into the acrylic resins achieved the desired antibacterial effect, with no changes in the biocompatibility properties of the resins. Moreover, the modified resins were effective against Candida albicans, the most common fungus in the oral cavity. Thus, the incorporation of PDADMAC in biomaterials seems to be promising in dentistry.
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Oliveira dos Santos RL, Hoyos Cadavid AM, Gomes Bitu M, Morandi G, Pena Coto N, Campanini Geraldini CA. Prevalence of the Use of Individual Protection Equipment and Accidents in Bicycle Users in São Paulo. Rev Cienc salud 2019. [DOI: 10.12804/revistas.urosario.edu.co/revsalud/a.7588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Introduction: Bikes are a popular means of transportation that brings health benefits when used regularly. However, accidents occurring in the users of this means of transport are frequent. The objective of this study was to evaluate the prevalence of accidents and the use of Personal protective equipment (ppe) in bicycle users in Sao Paulo (Brazil) through the forms. In addition, the population studied was oriented to the importance of the use of ppe. Materials and methods: Cyclists from different regions of Sao Paulo responded to the form on the ppe and in the end were oriented on the correct use of the ppe. Results: The total sample was 608 people, evaluated and interviewed (210 women and 398 men). The highest percentage of respondents was 20-40 years. The most used ppe were helmet, tennis and pedal signaling. 48 % of respondents said they had already suffered an accident with this means of transport. Most of the accidents occurred in leisure times, during the mornings of sunny days. 69.5 % of respondents heard the guidelines on the correct use of ppe. Conclusions: Most cyclists in the city of Sao Paulo are young, male and do not use the ppe. The accidents suffered, using as a means of transport the bicycle, reported by the reporting population, were not related to the weather conditions, nor with the consumption of alcohol. In this study it was observed that only cyclists who were already using ppe were interested in the guidelines on their importance and correct use.
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Santos RLOD, Gamarra JGA, Lincopan N, Petri DFS, Paula CR, Coto NP, Dias RB. Production of Medical Grade Silicone for Facial Prosthesis with Bactericidal Properties from the Inclusion of Poly (Diallyldimethylammonium Chloride): An in Vitro Study. Pesqui bras odontopediatria clín integr 2019. [DOI: 10.4034/pboci.2019.191.15] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Antunes LS, Torres AFC, Ferreira G, Prado R, Coto NP, Antunes LAA. Custom-made facemask as a coadjuvant in the postoperative treatment of sport-related facial trauma: Case report. Dent Traumatol 2018; 34:378-381. [PMID: 29999586 DOI: 10.1111/edt.12426] [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: 10/23/2017] [Revised: 07/05/2018] [Accepted: 07/06/2018] [Indexed: 11/29/2022]
Abstract
Maxillofacial injuries are a regular consequence of sport activities that can force athletes to take a long time off from training and competitions. One way to decrease the time that the athlete needs to get back to his or her training exercises after surgery is to use a custom facemask as a coadjuvant in the postoperative recovery phase. This case report describes the case of a 16-year-old male athlete who suffered facial trauma (orbitozygomatic fractures) during a soccer game. After surgery, a facemask was used during the postoperative phase. He returned to his regular physical activities only 3 weeks after surgery. This simple and very efficient procedure is a good option for athletes who suffer facial injuries.
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Affiliation(s)
- Leonardo Santos Antunes
- Postgraduate Program in Dentistry of Niterói Faculty of Dentisry, Federal Fluminense University (PPGO-FOUFF), Niterói, Rio de Janeiro, Brazil.,Department of Specific Formation, Health Institute of Nova Friburgo (ISNF), Laboratory of Sports Dentistry, School of Dentistry, Fluminense Federal University (UFF), Nova Friburgo, Rio de Janeiro, Brazil
| | - Ariane Ferraz Corrêa Torres
- Postgraduate Program in Dentistry of the Health Institute of Nova Friburgo (PPGO-ISNF), Fluminense Federal University, Nova Friburgo, Rio de Janeiro, Brazil
| | - Gustavo Ferreira
- Postgraduate Program in Dentistry of Niterói Faculty of Dentisry, Federal Fluminense University (PPGO-FOUFF), Niterói, Rio de Janeiro, Brazil
| | - Roberto Prado
- Postgraduate program in Dentistry, School of Dentistry, Unigranrio, Rio de Janeiro, Brazil
| | - Neide Pena Coto
- Department of Maxillofacial Surgery, Prosthetics and Traumatology, Division of Maxillofacial Prosthesis/Sports Dentistry, School of Dentistry, University of São Paulo - FOUSP
| | - Lívia Azeredo Alves Antunes
- Postgraduate Program in Dentistry of Niterói Faculty of Dentisry, Federal Fluminense University (PPGO-FOUFF), Niterói, Rio de Janeiro, Brazil.,Department of Specific Formation, Health Institute of Nova Friburgo (ISNF), Laboratory of Sports Dentistry, School of Dentistry, Fluminense Federal University (UFF), Nova Friburgo, Rio de Janeiro, Brazil.,Postgraduate Program in Dentistry of the Health Institute of Nova Friburgo (PPGO-ISNF), Fluminense Federal University, Nova Friburgo, Rio de Janeiro, Brazil
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Ferreira GB, Guimarães LS, Fernandes CP, Dias RB, Coto NP, Antunes LAA, Antunes LS. Is there enough evidence that mouthguards do not affect athletic performance? A systematic literature review. Int Dent J 2018; 69:25-34. [PMID: 29808910 DOI: 10.1111/idj.12406] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Although there is evidence that mouthguards prevent orofacial trauma occurrence during sport practice, the influence of this device on athletic performance has not been systematically quantified. OBJECTIVES We aim to systematically review the literature to determine the effect of mouthguards on athletic performance and if the type of mouthguard influences this overcome. MATERIALS AND METHODS A comprehensive search was performed in the Systematic Electronic Databases: Pubmed, Scopus, Web of Science and the Cochrane Library from their inception to February 2017. The publications were grouped based on their outcome: (i) the use of mouthguards; or (ii) the type of mouthguards. We conducted descriptive analyses and quality assessments of the included studies. RESULTS The search identified 489 citations. After screening the studies, we identified 15 trials comprising a population of 312 athletes. According to the risk of bias evaluation, nine studies were considered 'high' risk of bias, and six 'low' risk of bias. Overall, custom-made mouthguards did not interfere or improve athletes' performance when compared with the control group (without mouthguard). Custom-made mouthguards showed the smallest range of changes in players' performance compared with other types of mouthguards. CONCLUSIONS This systematic review provides evidence for sports professionals to advocate the use of custom-made mouthguards to prevent injury, and these devices do not impair performance. The scientific evidence should be interpreted carefully because there is a great variability in outcome measures and lack of important methodological details.
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Affiliation(s)
| | - Ludmila Silva Guimarães
- Postgraduate Program, School of Dentistry, Fluminense Federal University, Niterói, RJ, Brazil
| | - Claudio Pinheiro Fernandes
- Department of Specific Formation, School of Dentistry, Fluminense Federal University, Nova Friburgo, RJ, Brazil
| | - Reinaldo Brito Dias
- Department of Surgery, Prostheses and Maxillofacial Traumatology, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Neide Pena Coto
- Department of Surgery, Prostheses and Maxillofacial Traumatology, School of Dentistry, University of São Paulo, São Paulo, Brazil
| | - Lívia Azeredo A Antunes
- Department of Specific Formation, School of Dentistry, Fluminense Federal University, Nova Friburgo, RJ, Brazil
| | - Leonardo Santos Antunes
- Department of Specific Formation, School of Dentistry, Fluminense Federal University, Nova Friburgo, RJ, Brazil
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Pinheiro JB, Vomero MP, do Nascimento C, Watanabe E, Paranhos HDFO, Coto NP, Dias RB, Oliveira VCD, Silva-Lovato CH. Genomic identification of microbial species adhering to maxillofacial prostheses and susceptibility to different hygiene protocols. Biofouling 2018; 34:15-25. [PMID: 29258349 DOI: 10.1080/08927014.2017.1403591] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 11/03/2017] [Indexed: 06/07/2023]
Abstract
This study investigated the microbial colonization of maxillofacial prostheses and support tissues using the Checkerboard DNA-DNA hybridization method, and the efficacy of 0.12% chlorhexidine gluconate, 10% Ricinus communis solutions, or brushing, on colony forming unit (CFU) reduction in monospecies biofilms (Candida glabrata, Staphylococcus aureus, Streptococcus mutans, Escherichia coli, Enterococcus faecalis, and Pseudomonas aeruginosa) formed on two silicones (MDX 4-4210 and Bio-Skin). Biofilm was harvested from 43 maxillofacial prosthesis wearers for detection of 38 species of microorganisms. The CFU counts of the six above mentioned species were recorded after using the hygiene protocols. All 38 investigated species were identified in prostheses and tissues, with a higher prevalence in the prostheses. 0.12% chlorhexidine gluconate immersion showed the greatest antimicrobial effectiveness, followed by mechanical brushing protocols. MDX 4-4210 silicone produced lower CFU counts than Bio-Skin.
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Affiliation(s)
- Juliana Barchelli Pinheiro
- a Department of Dental Materials and Prostheses, School of Dentistry of Ribeirao Preto , University of Sao Paulo , Sao Paulo , Brazil
| | - Marina Peris Vomero
- a Department of Dental Materials and Prostheses, School of Dentistry of Ribeirao Preto , University of Sao Paulo , Sao Paulo , Brazil
| | - Cássio do Nascimento
- a Department of Dental Materials and Prostheses, School of Dentistry of Ribeirao Preto , University of Sao Paulo , Sao Paulo , Brazil
| | - Evandro Watanabe
- b Department of Restorative Dentistry, School of Dentistry of Ribeirao Preto , University of Sao Paulo , Sao Paulo , Brazil
| | | | - Neide Pena Coto
- c Department of Maxillofacial Surgery, Prostheses and Traumatology, School of Dentistry of Sao Paulo , University of Sao Paulo , Sao Paulo , Brazil
| | - Reinaldo Brito Dias
- c Department of Maxillofacial Surgery, Prostheses and Traumatology, School of Dentistry of Sao Paulo , University of Sao Paulo , Sao Paulo , Brazil
| | - Viviane Cássia de Oliveira
- a Department of Dental Materials and Prostheses, School of Dentistry of Ribeirao Preto , University of Sao Paulo , Sao Paulo , Brazil
| | - Cláudia Helena Silva-Lovato
- a Department of Dental Materials and Prostheses, School of Dentistry of Ribeirao Preto , University of Sao Paulo , Sao Paulo , Brazil
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Cobein MV, Coto NP, Crivello Junior O, Lemos JBD, Vieira LM, Pimentel ML, Byrne HJ, Dias RB. Retention systems for extraoral maxillofacial prosthetic implants: a critical review. Br J Oral Maxillofac Surg 2017; 55:763-769. [PMID: 28552609 DOI: 10.1016/j.bjoms.2017.04.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [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: 05/23/2016] [Accepted: 04/23/2017] [Indexed: 10/19/2022]
Abstract
We describe the techniques available for retention of implant-supported prostheses: bar-clips, O-rings, and magnets. We present reported preferences and, although this is limited by the heterogeneity of methods used and patients studied, we hope we have identified the best retention systems for maxillofacial prosthetic implants. If practitioners know the advantages and disadvantages of each system, they can choose the most natural and comfortable prosthesis. We searched the PubMed and Scopus databases, and restricted our search to papers published 2001-13. MeSH terms used were Maxillofacial prosthesis and Craniofacial prosthesis OR Craniofacial prostheses. We found a total of 2630 papers, and after duplicates had been removed we analysed the rest and found 25 papers for review. Of these, 12 were excluded because they were case reports or non-systematic reviews. Of the remaining 13, 10 described group analyses and seemed appropriate to find practitioner's choices, as cited in the abstract (n=1611 prostheses). Three papers did not mention the type of prosthetic connection used, so were excluded. The most popular choices for different conditions were analysed, though the sites and retention systems were not specified in all 10 papers. The bar-clip system was the most used in auricular (6/10 papers) and nasal prostheses (4/10). For the orbital region, 6/10 favoured magnets. Non-osseointegrated mechanical or adhesive retention techniques are the least expensive and have no contraindications. When osseointegrated implants are possible, each facial region has a favoured system. The choice of system is influenced by two factors: standard practice and the abilities of the maxillofacial surgeon and maxillofacial prosthetist.
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Affiliation(s)
- M V Cobein
- Oral and Maxillofacial Surgeon, Hospital Regional Sul, São Paulo, Brazil; Department of Maxillofacial Surgery, Prosthetics and Traumatology - Area of Maxillofacial Prosthetics, School of Dentistry of University of São Paulo, São Paulo, Brazil.
| | - N P Coto
- Department of Maxillofacial Surgery, Prosthetics and Traumatology - Area of Maxillofacial Prosthetics, School of Dentistry of University of São Paulo, São Paulo, Brazil.
| | - O Crivello Junior
- Department of Maxillofacial Surgery, Prosthetics and Traumatology - Area of Maxillofacial Traumatology, School of Dentistry of University of São Paulo, São Paulo, Brazil.
| | - J B D Lemos
- Department of Maxillofacial Surgery, Prosthetics and Traumatology - Area of Maxillofacial Traumatology, School of Dentistry of University of São Paulo, São Paulo, Brazil.
| | - L M Vieira
- Department of Maxillofacial Surgery, Prosthetics and Traumatology - Area of Maxillofacial Prosthetics, School of Dentistry of University of São Paulo, São Paulo, Brazil.
| | - M L Pimentel
- Department of Maxillofacial Surgery, Prosthetics and Traumatology - Area of Maxillofacial Prosthetics, School of Dentistry of University of São Paulo, São Paulo, Brazil.
| | - H J Byrne
- FOCAS Research Institute of Dublin Institute of Technology, Dublin, Ireland.
| | - R B Dias
- Department of Maxillofacial Surgery, Prosthetics and Traumatology - Area of Maxillofacial Prosthetics, School of Dentistry of University of São Paulo, São Paulo, Brazil.
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Gialain IO, Coto NP, Driemeier L, Noritomi PY, Dias RBE. A three-dimensional finite element analysis of the sports mouthguard. Dent Traumatol 2016; 32:409-15. [DOI: 10.1111/edt.12265] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/04/2016] [Indexed: 11/30/2022]
Affiliation(s)
| | - Neide Pena Coto
- Faculdade de Odontologia da Universidade de São Paulo; São Paulo Brazil
| | - Larissa Driemeier
- Departamento de Engenharia Mecatrônica e Sistemas Mecânicos; Escola Politécnica da Universidade de São Paulo; São Paulo Brazil
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Orellana RV, Coto NP, Medeiros IS, Dias RB. <b>Evaluation of the mechanical properties of acetic-cure silicone with the addition of magnesium silicate. Acta Sci Health Sci 2015. [DOI: 10.4025/actascihealthsci.v37i1.21318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Gialain IO, e Dias RB, Costa B, Coto NP. Mouthguard: a new technique for the partially edentulous patient. Dent Traumatol 2014; 30:411-414. [DOI: 10.1111/edt.12106] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/15/2013] [Indexed: 11/29/2022]
Affiliation(s)
| | - Reinaldo Brito e Dias
- Department of Maxillofacial Surgery Prosthetics and Traumatology School of Dentistry University of São PauloSão PauloBrazil
| | - Bruno Costa
- Department of Prosthodontics School of Dentistry University of São Paulo São Paulo Brazil
| | - Neide Pena Coto
- Department of Maxillofacial Surgery Prosthetics and Traumatology School of Dentistry University of São PauloSão PauloBrazil
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Souza LAD, Elmadjian TR, Brito e Dias R, Coto NP. Prevalence of malocclusions in the 13-20-year-old categories of football athletes. Braz Oral Res 2011; 25:19-22. [PMID: 21359447 DOI: 10.1590/s1806-83242011000100004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2010] [Accepted: 09/28/2010] [Indexed: 11/22/2022] Open
Abstract
The dentist can offer athletes improvement in their physical performance through the maintenance of oral health, preventing and treating any and all changes in the stomatognathic system, such as dental malocclusions, that compromise the athletes' performance. The objective of this study is to research the presence of dental malocclusions in athletes of the category between 13 and 20 years of age, from the São Paulo Football Club. 84 athletes participated in this study, dealing with the following topics: molar relation (Angle's classification); presence of overbite; underbite; overcrowding; abnormal spacing; open bite; and anterior, posterior, bilateral and unilateral crossbite; midline deviation and facial type (mesofacial, brachyfacial and dolichofacial). Only one table was made, showing percentages. In regard to Angle's molar relation, 89% are in Class I, 8% in Class II, 3% Class III, 9% of the athletes had overbite, 4% had underbite, 13% had overcrowding and 21% had abnormal spacing. In regard to the bite, 11% presented anterior open bite. In regard to crossbite, 7% presented unilateral crossbite on the right side and 2% on the left side; 5% presented posterior crossbite and 4% anterior crossbite. In regard to midline deviations, 4% presented deviation in the maxilla and 33% in the mandible. In regard to facial type: 39% are dolichofacial, 4% brachyfacial and 57% mesofacial. Based on the results shown, proposals for the implementation of dental, phoniatric, and Ear, Nose and Throat (ENT) practices are already being discussed with the multidisciplinary team of the club involved.
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Coto NP, Meira JBC, Brito e Dias R, Driemeier L, de Oliveira Roveri G, Noritomi PY. Assessment of nose protector for sport activities: finite element analysis. Dent Traumatol 2011; 28:108-13. [PMID: 21790992 DOI: 10.1111/j.1600-9657.2011.01046.x] [Citation(s) in RCA: 13] [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] [Indexed: 11/28/2022]
Abstract
There has been a significant increase in the number of facial fractures stemming from sport activities in recent years, with the nasal bone one of the most affected structures. Researchers recommend the use of a nose protector, but there is no standardization regarding the material employed. Clinical experience has demonstrated that a combination of a flexible and rigid layer of ethylene vinyl acetate (EVA) offers both comfort and safety to practitioners of sports. The aim of the present study was the investigation into the stresses generated by the impact of a rigid body on the nasal bone on models with and without an EVA protector. For such, finite element analysis was employed. A craniofacial model was constructed from images obtained through computed tomography. The nose protector was modeled with two layers of EVA (1 mm of rigid EVA over 2 mm of flexible EVA), following the geometry of the soft tissue. Finite element analysis was performed using the LS Dyna program. The bone and rigid EVA were represented as elastic linear material, whereas the soft tissues and flexible EVA were represented as hyperelastic material. The impact from a rigid sphere on the frontal region of the face was simulated with a constant velocity of 20 m s(-1) for 9.1 μs. The model without the protector served as the control. The distribution of maximal stress of the facial bones was recorded. The maximal stress on the nasal bone surpassed the breaking limit of 0.13-0.34 MPa on the model without a protector, while remaining below this limit on the model with the protector. Thus, the nose protector made from both flexible and rigid EVA proved effective at protecting the nasal bones under high-impact conditions.
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Affiliation(s)
- Neide Pena Coto
- Faculdade de Odontologia da Universidade de São Paulo, Brazil.
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Abstract
In the present investigation, an experimental dental arch model fabricated in epoxy was assayed in Kratos universal testing machine to study the mechanical behavior of ethylene and vinyl acetate copolymer (EVA) in the form of mouthguard for sports and flat plate. The following variables were considered: thickness (3 and 4-mm plates), temperature (room and mouth temperature) and presence/absence of artificial saliva. Mechanical properties of EVA were tested under compressive strength: apparent absorbed energy (J.mm-1), maximum tension (N.mm-1), maximum dislocation (mm) and maximum strength (N). Data were recorded and modeled mathematically. Regarding the absorbed energy, maximum tension and maximum force, it was verified that the higher the thickness of the mouthguards, the better the results of force dissipation and redirection to the system and to several regions of the dental arch. In the presence of saliva and close to mouth temperature, the material responded positively to these alterations, resenting increased ductibility as well as improved mechanical responses. Regarding maximum dislocation, it was observed a better accommodation of the occlusion under conditions that simulate those observed in the oral environment. In conclusion, EVA proved to be an adequate material for fabrication of mouthguards and interocclusal splints. In addition, EVA showed good results in force dissipation and demonstrated a shock-absorbing capacity and a great protection potential.
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