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SHAISTA ZAFAR
NEUTRAL
ZONE
Gahan and Walmsley (2005) defined
neutral zone as the area in the
mouth where during function, the
forces of the tongue pr...
Free template from www.brainybetty.com 5
NEUTRAL ZONE
IMPRESSION
TECHNIQUE
 It’s a physiological and functional
approach that is widely and concisely
described as a treatment modality for
unstable...
 who have had numerous
unstable, unretentive lower
complete dentures.
EVEN AFTER
HAVING..
 Atrophies
mandible>maxilla
 Mandible has less
residual ridge for
retention and support
 Difficulty for positioning
the...
Free template from www.brainybetty.com 17
Free template from www.brainybetty.com 19
LABIAL RESORPTION
Free template from www.brainybetty.com 20
FORCES
INWARD
FORCES
OUTWARD
FORCES
Buccinator
Modiolus
Orbicularis oris
TONGUE
Free template from www.brainybetty.com 22
INDICATIONS
CATIONSIONS
 Severely atrophic mandibular ridge
 High mentalis attachment
 Neuromuscular disease
 Atypical shape of oral structure...
AIM
 Is to improve denture stability
by constructing a denture that is shaped
by muscle functionand is in
harmony with the
su...
OTHER
ADVANTAGES
 Improved stability and retention
 Posterior teeth will be correctly
positioned allowing sufficient
tongue space
 Reduc...
MATERIAL USED
FOR
NEUTRAL ZONE
IMPRESSION
 Stock trays
 Impression Compound
 Zinc Oxide Eugenol
 Custom tray
 Green stick
 Orthodontic Ni/Ti wires
 ModelingW...
Free template from www.brainybetty.com 32
CASE REPORT
Free template from www.brainybetty.com 33
EDENTULOUS MAX ARCH EDENTULOUS MANDIBULAR ARCH
Free template from www.brainybetty.com 34
CLINICALTECHNIQUE
Free template from www.brainybetty.com 35
:Preliminary impression with impression compoundSTEP 1
Free template from www.brainybetty.com 36
STEP 2 Wash impression with Zinc Oxide Eugenol
Free template from www.brainybetty.com 37
A lower acrylic special tray with
metal spurs to aid retention of the
impression...
Free template from www.brainybetty.com 38
JAW RELATIONSTEP 4:
Free template from www.brainybetty.com 39
STEP 5STEP 5: Occlusal pillars built in
green stick to establish the
occlusal he...
Free template from www.brainybetty.com 40
STEP 6
Tissue conditioner being molded with
the mouth movements
Free template from www.brainybetty.com 41
STEP 7: The tray now kept on the cast
Free template from www.brainybetty.com 42
STEP 8: Plaster index formed around the neutral zone impression
 Neutral zone i...
Free template from www.brainybetty.com 43
STEP 9: Wax rim formed
Free template from www.brainybetty.com 44
STEP 10: Teeth set up in neutral zone
Free template from www.brainybetty.com 45STEP 11: INSERTION
 Special impression techniques are useful for the
construction of lower complete dentures on
highly atrophic ridges in ca...
 Prosthodontic treatment for edentulous patients-
13th edition by ZARB,HOBKIRK,ECKERT,JACOB
 Clinical dental prosthetics...
 F
 L
O
B R U S H
I S
N T
S M I L E
E E
T H A N KY O U
H
Neutral zone impression technique
Neutral zone impression technique
Neutral zone impression technique
Neutral zone impression technique
Neutral zone impression technique
Neutral zone impression technique
Neutral zone impression technique
Neutral zone impression technique
Neutral zone impression technique
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Neutral zone impression technique

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Neutral zone impression technique

  1. 1. SHAISTA ZAFAR
  2. 2. NEUTRAL ZONE
  3. 3. Gahan and Walmsley (2005) defined neutral zone as the area in the mouth where during function, the forces of the tongue pressing outwards are neutralised by the forces of the cheeks and lips pressing inwards.
  4. 4. Free template from www.brainybetty.com 5
  5. 5. NEUTRAL ZONE IMPRESSION TECHNIQUE
  6. 6.  It’s a physiological and functional approach that is widely and concisely described as a treatment modality for unstable lower complete denture cases Free template from www.brainybetty.com 7
  7. 7.  who have had numerous unstable, unretentive lower complete dentures.
  8. 8. EVEN AFTER HAVING..
  9. 9.  Atrophies mandible>maxilla  Mandible has less residual ridge for retention and support  Difficulty for positioning the teeth to produce a stable denture
  10. 10. Free template from www.brainybetty.com 17
  11. 11. Free template from www.brainybetty.com 19 LABIAL RESORPTION
  12. 12. Free template from www.brainybetty.com 20
  13. 13. FORCES INWARD FORCES OUTWARD FORCES Buccinator Modiolus Orbicularis oris TONGUE
  14. 14. Free template from www.brainybetty.com 22
  15. 15. INDICATIONS CATIONSIONS
  16. 16.  Severely atrophic mandibular ridge  High mentalis attachment  Neuromuscular disease  Atypical shape of oral structures  Trauma  Systemic disease  Locate optimal position for implants.  Partial glossectomy  Motor nerve damage to the tongue 25
  17. 17. AIM
  18. 18.  Is to improve denture stability by constructing a denture that is shaped by muscle functionand is in harmony with the surrounding oral structures.
  19. 19. OTHER ADVANTAGES
  20. 20.  Improved stability and retention  Posterior teeth will be correctly positioned allowing sufficient tongue space  Reduced food trapping adjacent to the molar teeth  Good aesthetics due to facial support.
  21. 21. MATERIAL USED FOR NEUTRAL ZONE IMPRESSION
  22. 22.  Stock trays  Impression Compound  Zinc Oxide Eugenol  Custom tray  Green stick  Orthodontic Ni/Ti wires  ModelingWax  Tissue ConditionersFree template from www.brainybetty.com 31
  23. 23. Free template from www.brainybetty.com 32 CASE REPORT
  24. 24. Free template from www.brainybetty.com 33 EDENTULOUS MAX ARCH EDENTULOUS MANDIBULAR ARCH
  25. 25. Free template from www.brainybetty.com 34 CLINICALTECHNIQUE
  26. 26. Free template from www.brainybetty.com 35 :Preliminary impression with impression compoundSTEP 1
  27. 27. Free template from www.brainybetty.com 36 STEP 2 Wash impression with Zinc Oxide Eugenol
  28. 28. Free template from www.brainybetty.com 37 A lower acrylic special tray with metal spurs to aid retention of the impression material STEP 3
  29. 29. Free template from www.brainybetty.com 38 JAW RELATIONSTEP 4:
  30. 30. Free template from www.brainybetty.com 39 STEP 5STEP 5: Occlusal pillars built in green stick to establish the occlusal height
  31. 31. Free template from www.brainybetty.com 40 STEP 6 Tissue conditioner being molded with the mouth movements
  32. 32. Free template from www.brainybetty.com 41 STEP 7: The tray now kept on the cast
  33. 33. Free template from www.brainybetty.com 42 STEP 8: Plaster index formed around the neutral zone impression  Neutral zone impression removed to make the wax rim
  34. 34. Free template from www.brainybetty.com 43 STEP 9: Wax rim formed
  35. 35. Free template from www.brainybetty.com 44 STEP 10: Teeth set up in neutral zone
  36. 36. Free template from www.brainybetty.com 45STEP 11: INSERTION
  37. 37.  Special impression techniques are useful for the construction of lower complete dentures on highly atrophic ridges in cases where dental implants are not possible  Neutral zone impression technique is a useful technique aims to construct a denture in muscle balance, it is relatively simple but it is demanding both clinically and technically.
  38. 38.  Prosthodontic treatment for edentulous patients- 13th edition by ZARB,HOBKIRK,ECKERT,JACOB  Clinical dental prosthetics-FENN & GIMSON’S  GAHAN, M. J. &WALMSLEY, A. D. 2005.The neutral zone impression revisited. British dental journal, 198, 269-272  http://www.slideshare.net/eugeneyeoh1/piezograp h-2  http://www.jaypeejournals.com/eJournals/ShowTex t.aspx?ID=3376&Type=FREE&TYP=TOP&IN=_eJour nals/images/JPLOGO.gif&IID=261&isPDF=NO  http://www.ncbi.nlm.nih.gov/pmc/articles/PMC308 1261/
  39. 39.  F  L O B R U S H I S N T S M I L E E E T H A N KY O U H

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