Page 32 - Impact of implant retained overdenture treatment and speech, oromyofunction, social participation and quality of life.

Chapter 1
30
Table 1. continued Authors
Purpose the study
Subjects and methods
Results
Lundqvist et al. (1992)
Assessment
of difference
in articulation between upper CD (with palatal coverage) and upper FID and the correlation with inter-dental space in the same subjects.
n: 17 : 12
: 5
Perceptual analysis of /t/ and /s/ sound (using 4 SLPs and a non-expert group)
- Pre-implant: 30% had slightly distorted /s/ and 5% slightly distorted /t/
- Post-implant (3-6 months): 45% had slightly distorted /s/, 10% had heavily
Ichikawa et al. (1995)
Influence of changes made in the oral cavity on speech.
n: 7
: 0
Spectral analysis of speech
- The changes in augmentation had no influence on the /k/-sound
- Aspiration time and the VOT (Voice Onset Time) of the /c/ prolonged
Analysis of the prosthesis
- Inter-dental space-difference - Height.
- Width
distorted /s/ and 30% had slightly distorted /t/, 5% had heavily distorted
Timing/ adaptation time:
- Pre-implant: CD
- Post-implant: 3-6 months with FID. - Post- implant: 3 years
Spectral analysis
- Energy of /s/ in post-implant condition was spread over the whole
:7
Subjects had a normal dentition
significantly.
- The vertical occlusion had no significant influence on speech.
Changes to the oral cavity
- 1 mm augmentation of the palate.
- 8 mm enlargement of the vertical distance
in occlusion.
Adaptation time: not provided
/t/
- Post-implant (3 years): same level as CD (pre-implant)
frequency band in the 3-6 months post-implant situation.
Questionnaire satisfaction
- Pre-implant: 29% considered their speech worsened by the prosthesis - Post-implant (3-6 months): 24% reported speech problems
- Post-implant (3 years): 6% reported speech problems
Analysis of the prosthesis
- Inter-dental space had no significant influence on speech.
- Little influence of height and width on distortion of the /s/ sound.