1 / 67

PHONETICS IN COMPLETE DENTURES

PHONETICS IN COMPLETE DENTURES. DEFINITION. Speech:- The faculty or act of expressing or describing thoughts, feelings, or perceptions by the articulation of words.

walters
Download Presentation

PHONETICS IN COMPLETE DENTURES

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. PHONETICS IN COMPLETE DENTURES

  2. DEFINITION Speech:- The faculty or act of expressing or describing thoughts, feelings, or perceptions by the articulation of words. Phonetics:- The branch of linguistics that deals with the sounds of speech and their production, combination, description, and representation by written symbols. http://www.thefreedictionary.com

  3. MECHANISM OF SPEECH PRODUCTION Normal speech depends on proper functioning of 5 essential mechanism The motor( lungs, associated muscle that supply the air). The vibrator ( vocal cord that give pitch to the tone). The resonator ( consist of the oral,nasal, pharyngeal cavity and paranasal sinuses). • The enunciators or articulators( lip, tongue, palate and teeth) The initiator( motor area of the brain)

  4. COMPONENTS OF SPEECH RESPIRATION AUDITION PHONATION COMPONENTS OF SPEECH NEUROLOGIC INTEGRATIONS RESONATIONS ARTICULATIONS Ref:- Chierici, Lawson; Clinical speech consideration in prosthodontics. J Prosthet dent;1973;29;1:29-39

  5. RESPIRATION The movement of air in the inspiratory and expiratory phase is important in production of speech. Ref:- Chierici, Lawson; Clinical speech consideration in prosthodontics. J Prosthet dent;1973;29;1:29-39

  6. PHONATION Ref:- Chierici, Lawson; Clinical speech consideration in prosthodontics. J Prosthet dent;1973;29;1:29-39 Air from the lungs courses through the trachea. Sound is produced in the larynx Vibration of vocal cord takes place

  7. RESONANCE Sound that is produced by the vocal cord is modified by various chamber. • Resonators are • pharynx • oral cavity • nasal cavity • Paranasal sinuses Ref:- Chierici, Lawson; Clinical speech consideration in prosthodontics. J Prosthet dent;1973;29;1:29-39

  8. SPEECH ARTICULATION Sound that is produced is formed into meaningful words Tongue,lips,palate, teeth and mandible play are very important role. Ref:- Chierici, Lawson; Clinical speech consideration in prosthodontics. J Prosthet dent;1973;29;1:29-39

  9. NEUROLOGIC INTEGRATION Factors for speech production are highly coordinated, some sequentially and some simultaneously by the central nervous system. Speech is a learned function and requires adequate hearing, vision, and normal nervous system for its full development. Ref:- Chierici, Lawson; Clinical speech consideration in prosthodontics. J Prosthet dent;1973;29;1:29-39

  10. TYPES OF SPEECH 1.VOWELS: a,e,i,o,u. they are voiced sounds, 2.CONSONANTS: may be either voiced or produced without vocal cord vibration, in which case they are called breathed sounds. eg: p, b, m, s, t, r, z etc… 3.COMBINATION: Is blend of a consonant and vowel, articulated in quick succession that they are identified as single phonemes. EX:- WORD Zarb- Bolender:Speech consideration with complete dentures ;Prosthodontic treatment For Edentulous Patients

  11. CLASSIFICATION OF SPEECH • According to Boucher • Vowels. • Consonants. • Plosives/stops • Fricatives • Afficatives • Nasal • Liquid • Glides Zarb- Bolender:Speech consideration with complete dentures ;Prosthodontic treatment For Edentulous Patients

  12. ACCORDING TO SONORITY SONANTS Voiced sound Produced by vibration of a portion of the vocal cords Oral resonators modify the airstream All vowels and vowel like sounds are representatives. STRUDS:- Voiceless sounds Produced by the separation of vocal cords Eg:- s,h,sh,zh CONSONANTS:- Articulated speech Airstream has to be modified at the proper place and time for producing these sound Most important for dentist John. Sharry. Complete denture Prosthodontics 3rd edition; Phonetics pg 132

  13. CLASSIFICATION OF CONSONANTS: Divided into groups depending on theircharacteristic production and use of different articulators and valves. They are as follows. Plosive consonants: These sounds are produced when overpressure of the air has been built up by consonants between the soft palate and pharyngeal wall and released in an explosive way. Ex: P (pay), B (bay), T (to), D (dot) Zarb- Bolender:Speech consideration with complete dentures ;Prosthodontic treatment For Edentulous Patients

  14. Fricatives: are also called sibilants and are characterized by their sharp and whistling sound quality created when air is squeezed through the nearly obstructed articulators. Ex: S (so), Z (zoo) Affricative consonants: are a mix between plosive and fricative ones. Ex: Ch (chin), J (jar) Zarb- Bolender:Speech consideration with complete dentures ;Prosthodontic treatment For Edentulous Patients

  15. Nasal consonants:are produced without oral exit of air. Production involves the coupling of nasal cavity as resonators. Ex: M (man), N (name), NG (bang) Zarb- Bolender:Speech consideration with complete dentures ;Prosthodontic treatment For Edentulous Patients

  16. Liquid consonants(semi vowels) : are , as the name implies , produced with out friction. Ex: R (rose), L(lily) Glides: that is sounds characterized by a gradually changing articulator shape Ex: W (witch), Y (you) Zarb- Bolender:Speech consideration with complete dentures ;Prosthodontic treatment For Edentulous Patients

  17. CLASSIFICATION OF CONSONANTS BASED ON THE PLACE OF THEIR PRODUCTION Consonant sounds are most important from the dental point of view. Theymay be classified according to the anatomic parts involved in their formation: (1) Palatolingual sounds, formed by tongue and hard or soft palate, (2) Linguodental sounds, formed by the tongue and teeth, (3) Labiodental sounds, formed by the lips and teeth, and (4) Bilabial sounds, formed by the lips. Robert Rothman; Phonetic consideration in denture prosthesis, J Prosthet Dent;1961;11:214-223)

  18. PALATOLINGUAL SOUNDS FORMED BY TONGUE AND HARD PALATE Word like S, T D N and L belong to this catogory S- the sound ‘s’ as in sixty six- is formed by a hiss of air as it escapes form the median groove of the tongue when the tongue is behind the upper incisor If groove is deep a whistling will be heard when s is pronounced If groove is decreased s is softened towardssh (Lisping) Robert Rothman; Phonetic consideration in denture prosthesis, J Prosthet Dent;1961;11:214-223)

  19. HISTORY In 1949 ‘Sears’ recommended grooving the palate just above the median sulcus of the patient. In 1951 ‘Pound’ was successful in improving phonetics by contouring the entire palatal aspect of the maxillary denture to simulate the normal palate ‘Landa’ suggested the use of ‘s’ sound to determine the adequacy of ‘free way space’ & ‘M’ sound to establish a desirable ‘rest position’.

  20. 1953 & 1956, ‘Silverman’ used ‘speaking method’ to measure patient’s vertical dimension in natural teeth with dentures & without dentures. ‘Morrison’ suggested the use of the word, ‘sixty six’ & ‘Mississippi’to determine closest speaking space 1967, ‘Kaire’ reported & determined the palatal pressure of the tongue in the pronunciation of selected palatolingual speech sounds, by electronic means under predetermined vertical dimensions of occlusion.

  21. CLINICAL SIGNIFICANCE the sound S can be used to check the proper placement of the anterior teeth the thickness of the denture base can be adjusted in case the sound S is not produced correctly Robert Rothman; Phonetic consideration in denture prosthesis, J Prosthet Dent;1961;11:214-223)

  22. CLINICAL SIGNIFICANCE Silverman also used this word to establish and check a proper vertical dimension of occlusion Ref:- Robert Rothman; Phonetic consideration in denture prosthesis, J Prosthet Dent;1961;11:214-223)

  23. T, D, N and L word Rugae area is very important for the production of these sounds Tongue must be placed firmly against the anterior part of the hard palate for the production of these words Robert Rothman; Phonetic consideration in denture prosthesis, J Prosthet Dent;1961;11:214-223)

  24. Therefore…. Should rugae be duplicated in the denture or no is the question that arises…. Slaughter say.. The smoothness of the denture is disturbing and the tongue looses its capacity for local orientation Landa says that rugae is useless or even detrimental because it adds more bulk to the denture… Ref:-Robert Rothman; Phonetic consideration in denture prosthesis, J Prosthet Dent;1961;11:214-223)

  25. CLINICAL SIGNIFICANCE If teeth too lingual – T will sound like D If teeth too forward - D will sound like T

  26. PALATOLINGUAL SOUNDS FORMED BY TONGUE AND SOFT PALATE Consonant k, ngand g are representative of the palatolingual group of sounds. Sound is formed by raising the back of the tongue to occlude with the soft palate and then suddenly depressing the middle portion of the back of the tongue realising the air in a puff

  27. CLINICAL SIGNIFICANCE If the posterior borders are over extended or if there is no tissue contact k becomes ch sound. Ref:- Robert Rothman; Phonetic consideration in denture prosthesis, J Prosthet Dent;1961;11:214-223)

  28. LINGUODENTAL SOUNDS • Consonant Th is representative of the linguodental group of sounds • Dental sounds are made with the tip of the tongue extending slightly between the upper and lower anterior teeth.

  29. LINGUODENTAL SOUNDS Sound is actually made closer to the alveolus (the ridge) than to the tip of the teeth. Careful observation of the amount of tongue that can be seen with the words - this, that, these and those will provide information as to the labio-lingual position of the anterior teeth. Robert Rothman; Phonetic consideration in denture prosthesis, J Prosthet Dent;1961;11:214-223)

  30. CLINICAL SIGNIFICANCE If about 3mm of the tip of the tongue is not visible, the anterior teeth are probably too far forward, If more than 6mm of the tongue extends out between the teeth when such sounds are made, the teeth are probably too lingual . Robert Rothman; Phonetic consideration in denture prosthesis, J Prosthet Dent;1961;11:214-223)

  31. LINGUOALVEOLAR SOUNDS T, D, S, Z, V & 1 are representative of the linguoalveolar group of sounds • Formed with the valve formed by contact of the tip of the tongue with the most anterior part of the palate (the alveolus) or the lingual sides of the anterior teeth. Robert Rothman; Phonetic consideration in denture prosthesis, J Prosthet Dent;1961;11:214-223)

  32. LINGUOALVEOLAR SOUNDS Sibilants (sharp sounds)s, z, sh, ch & j (with ch & j being affricatives) are alveolar sounds, because the tongue and alveolus forms the controlling valve. Important observations when these sounds are produced are the relationship of the anterior teeth to each other. Robert Rothman; Phonetic consideration in denture prosthesis, J Prosthet Dent;1961;11:214-223)

  33. CLINICAL SIGNIFICANCE Upper and lower incisors should approach end to end but not touch. Failure indicates a possible error in the horizontal overlap of the anterior teeth Ref :- Robert Rothman; Phonetic consideration in denture prosthesis, J Prosthet Dent;1961;11:214-223)

  34. LABIODENTAL SOUNDS F and V are representatives of the labiodental group of sounds. Formed by raising the lower lip into contact with the incisal edge of the maxilliary anterior teeth. Ref:- Robert Rothman; Phonetic consideration in denture prosthesis, J Prosthet Dent;1961;11:214-223)

  35. CLINICAL SIGNIFICANCE • Upper anterior teeth are tooshort (set too high up), V sound will be more like an F. • If they are too long (set too far down), F will sound more like a V. Ref:- Robert Rothman; Phonetic consideration in denture prosthesis, J Prosthet Dent;1961;11:214-223)

  36. BILABIAL SOUNDS B,p and m are representatives of the bilabial group of sounds. Formed by the stream of air coming from the lungs which meets with no resistance along its entire path until it reaches the lip. Robert Rothman; Phonetic consideration in denture prosthesis, J Prosthet Dent;1961;11:214-223)

  37. CLINICAL SIGNIFICANCE Used to asses the correct interarch space Correct labiolingual positioning of the anterior teeth Labial fullness of the rims can also be checked Ref:-Robert Rothman; Phonetic consideration in denture prosthesis, J Prosthet Dent;1961;11:214-223)

  38. VOWELS

  39. PHONETICS IN RECORDING JAW RELATION Also called as the speaking method Sibiliant sounds like S and M is used. S sound gives the approximate closest speaking space M sound gives us the freeway space Approximately 2mm of space must be there between the two occlusal rims Meyer M Silverman :The speaking method in measuring vertical dimension; J prosthet dent 1953;3:193-199

  40. S-SOUND AND THEIR PROSTHODONTIC COSIDERATIONS Say now shibboleth; and he said sibboleth, for he could not frame to pronounce it right…..” (THE BIBLE )

  41. CLINICAL SIGNIFICANCE Thickness of denture Antero-posterior position of teeth Vertical dimension of occlusion Width of dental arch: Relationship of upper teeth to the lower anterior teeth by “S-POSITION

  42. DIFFERENT PARTS OF ORAL CAVITY AND THEIR INFLUENCE ON SPEECH LIPS TONGUE: PALATE TEETH

  43. PROSTHODONTIC IMPLICATION IN DENTURE DESIGN AFFECTING SPEECH Denture thickness and peripheral outline Vertical dimension Occlusal plane Relationship of the upper and lower teeth Post dam area Anteriorposterior positioning of teeth Width of dental arch Fenn, clinical dental prosthetics, 3rd edition pg 138

  44. DENTURE THICKNESS AND PERIPHERAL OUTLINE Ref:-Fenn, Clinical dental prosthetics, 3rd edition pg 138 If the denture bases are too thick. Lisping will occur with the word like S C and Z Palatolingual sounds most affected. (T,D).

  45. VERTICAL DIMENSION Bilabials are mostly affected P B and M If both rims touch prematurely it indicated excessive vertical dimension. In try in stage teeth clicking will be heard. Ref:-Fenn, clinical dental prosthetics, 3rd edition pg 139

  46. OCCLUSAL PLANE Labioldental sounds F and V are affected. If occlusal plane is too high the correct position of the lower lip is difficult If the occlusal plane is too low there is overlap of the lower lip on the labial surface of upper teeth Ref:-Fenn, clinical dental prosthetics, 3rd edition pg 138

  47. ANTERIORPOSTERIOR POSITIONING OF TEETH F and V sounds are hampered. labiopalatal positions of the teeth is very important Teeth if placed too palatallythe lower lip will not meet the insical edge of the upper teeth. Ref:-Fenn, Clinical Dental Prosthetics, 3rd edition pg 138

  48. POST DAM AREA Palatolingual consonants are affected (K, NG and G) Thick post dam areas will irritates the dorsum of the tongue Patient feels nausea like effect while speaking If inadequate the plosive sound of the word is hampered This area is very important in singers who wear complete denture Ref:-Fenn, Clinical Dental Prosthetics, 3rd edition pg 138

  49. WITDH OF DENTAL ARCH If teeth are set into an arch that is too narrow the tongue will be cramped Consonants like T, D, N K and S are affected Ref:-Fenn, Clinical Dental Prosthetics, 3rd edition pg 138

  50. RELATIONSHIP OF THE UPPER AND LOWER INCISORS The chief concern is the S CH, J and Z sound. These sounds need a near contact of the upper and lower teeth so that the air stream is allowed to pass. Ref:-Fenn, Clinical Dental Prosthetics, 3rd edition pg 138

More Related