Longitudinal research on the oral environment of elderly wearing fixed or removable prostheses |
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| Authors: | Junko Tanaka Masahiro Tanaka Takayoshi Kawazoe |
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| Institution: | 1. Department of Mechanical Engineering, University of Alberta, Edmonton, Canada;2. Department of Orthodontics and Oral Facial Genetics, School of Dentistry, Indiana University, Indianapolis, USA;3. Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Canada;1. Chinese Academy of Medical Sciences, Beijing 100730, China;1. Cork University Dental School and Hospital, University College Cork, Ireland;2. School of Medicine, University College Cork, Ireland;3. School of Mathematical Sciences, University College Cork, Ireland;4. Centre for Policy Studies, University College Cork, Ireland;1. Research Assistant, Research and Development, Spofa Dental Kerr Company, Ji?in, Czech Republic;2. Research Assistant, Department of Prosthodontics, Wroclaw Medical University, Wroc?aw, Poland;3. Research Assistant, Department of Experimental Dentistry, Wroclaw Medical University, Wroc?aw, Poland;4. Professor, Department of Prosthodontics, Wroclaw Medical University, Wroc?aw, Poland;5. Professor, Department of Prosthodontics, Wroclaw Medical University, Wroc?aw, Poland;1. Department of Surgery, Faculty of Medicine, University of Salamanca (USAL), C/Alfonso X el Sabio s/n, Campus de Unamuno, 37007 Salamanca, Spain;2. Department of Buccofacial Prostheses, Faculty of Dentistry, Complutense University of Madrid (UCM), Pza. Ramón y Cajal s/n, 28040 Madrid, Spain;3. Tissue Engineering & Reparative Dentistry, School of Dentistry, Cardiff University, CF14 4XY Cardiff, Wales, UK;4. Department of Stomatology, Faculty of Dentistry, University of Seville (US), C/Avicena s/n, 41009 Seville, Spain |
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| Abstract: | PurposeThe purpose of this study was to investigate oral environmental risk factors involved in caries incidence in the elderly. We investigated the relationship between the oral environment factors of the elderly with both fixed prostheses and removable prostheses at baseline and at follow-up and examined time-course changes of each oral environmental factor by prosthesis type.Materials and methodsThe subject group consisted 11 elderly patients with fixed prostheses and 11 who wore removable prostheses. We examined oral environmental factors by saliva tests. Five oral environmental factors were examined: the stimulated salivary flow rate, buffering capacity, and the counts of mutans streptococci (SM), lactobacilli (LB), and Candida (CA). We compared these factors for subjects with fixed prostheses and those wearing removable prostheses at baseline and at follow-up. Furthermore, 3-year changes in the factors of each oral environment were compared and evaluated.ResultsSignificant differences were observed between the two groups in the salivary microbial counts of SM and LB at baseline and at follow-up. The LB counts increased in the Denture group during the 3-year period and significant differences were noted.ConclusionsWe found that fixed prostheses are less cariogenic, and removable prostheses cause an increase in the cariogenic bacterial count. Regarding time-course changes by the type of prosthesis, the LB count tended to increase in the subjects with removable prostheses. The risk of caries due to a fixed prosthesis may be lower than that of removable prostheses. |
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