A SYSTEMATIC REVIEW Journal of Dentomaxillofacial Science (J Dentomaxillofac Sci ) April 2018, Volume 3, Number 1: 1-4 P-ISSN.2503-0817, E-ISSN.2503-0825 1 © 2018 JDMFS. Published by Faculty of Dentistry, Hasanuddin University. All rights reserved. http://jdmfs.org CrossMark Abstr act Objective: Getting information about on influence of denture bases design on speech ability on maxillary denture wearer. Methods: Electronic search in PubMed and Wiley online library databases to find articles that were published in last 20 years; between January 1998 to December 2017 with keywords “denture bases” and “speech”. The articles were then selected by reviewing the title and abstract. Result: The initial search obtained 52 articles. Then selected by involving the inclusion criteria. Finally, it gain 2 articles only that suitable with the inclusion criteria. Conclusion: Speech ability is usually not the main complain of denture wearer. Subjects with inappropriate design of the prosthetic base, disposition of artificial teeth and functional quality (retention, support, stability) have dyslalia when pronunciation of separate phonemes is changed. Keywords: Denture bases, Speech Cite this Article: Muchtar M, Habar ID. 2018. The speech ability on maxillary denture wearer: a systematic review. Journal of Dentomaxillofacial Science 3(1): 1-4. DOI: 10.15562/jdmfs.v3i1.731 The speech ability on maxillary denture wearer: a systematic review Meriyam Muchtar, * Ike D. Habar Introduction Human speech is a result of the following physiological processes: respiration, phona- tion, resonance, speech articulation, audition, neurological function, emotional behavior. 1-3 Te voice of each person is unique and is generally determined by the size of the resonator system (oral cavity, larynx, pharynx, vocal folds, nasal sinus), which vibrates at diferent frequencies, producing various sounds. 1,4 Te voice quality is characterized by speech intelligibility (relationship between the voice pitch, volume, timbre and speech speed). Changes in the oral cavity resulting from the loss of teeth and the resorption of the processus alveolaris maxillae or the processus alveo-laris mandibulae, may cause defects in the patient`s voice and speech. One of the most frequent phonetic distortions is lisping. 5 Omission, substitution, distortion, addition and nasality are also possible when improper and functionally low quality dentures are used. 5,6 Restrictions or alterations of the normal mandibu- lar movement may impede the transmission of acoustic energy through the oral cavity, thereby afecting both oral resonatory characteristics and oral/nasal resonance balance. 6 Te phonet- ic adaptation of the patients with complete dentures depends on selection and placing of the artifcial teeth, the thickness, size and placement of the maxillary prosthetic base, the optimal space of the tongue, individual adaptation capacity, patients sound recognizing capacity, Efective speech requires teeth. Proper positioning of the artifcal teeth, appropriate design and functional quality of dental prostheses, small changes in the prosthetic feld and full adaptation to the foreign body, the dental prosthesis in the oral cavity, are important factors speech intelligibility. 2,4,5-9 Te position of artifcial teeth is a very important factor infuencing the voice quality afer the inser- tion of dental prostheses. It is proved (1 that the dental consonant /s/ is mispronounced phonetic articulators as tongue position and a narrow stream of air across the incisal edges. Terefore, this phoneme is ofen used for phonetic tests when the front artifcial teeth are mounted. 2,4,5 Te anatomical orientators of the location of natural teeth is a very important factor when setting up the anterior teeth. Many authors believe that the incisal papilla and the rugae palatina are the most reliable orientators because resorption of the alveolar bone does not afect them. 1,4,6 Resonance is one of the most important char- acteristics of the human speech. Te resonance depends on the age, gender, spoken language, phonetic environment of the pronunced sounds, models and speech conventions. 8,9 Tooth loss afects multiple parameters. In partic- ular, prosthetic dentistry has put special emphasis on patient-centered assesments such as quality of life and satisfaction with dentures. Terefore, the outcome of dental rehabilitation is strongly infuenced by the patients satisfaction with the Department of Prosthodontic, Faculty of Dentistry, Hasanuddin University, Makassar, Indonesia * Corresponding to: Meriyam Muchtar, Department of Prosthodontic, Faculty of Dentistry, Hasanuddin University, Makassar, Indonesia iyankmuchtar@gmail.com Received: 27 January 2018 Revised: 19 March 2018 Accepted: 22 March 2018 Available online: 1 April 2018