J Adv Prosthodont.  2012 May;4(2):61-71.

Comparison of immediate complete denture, tooth and implant-supported overdenture on vertical dimension and muscle activity

• Shah FK
• Gebreel A
• Elshokouki AH
• Habib AA
• Porwal A

Abstract

PURPOSE
To compare the changes in the occlusal vertical dimension, activity of masseter muscles and biting force after insertion of immediate denture constructed with conventional, tooth-supported and Implant-supported immediate mandibular complete denture.
MATERIALS AND METHODS
Patients were selected and treatment was carried out with all the three different concepts i.e, immediate denture constructed with conventional (Group A), tooth-supported (Group B) and Implant-supported (Group C) immediate mandibular complete dentures. Parameters of evaluation and comparison were occlusal vertical dimension measured by radiograph (at three different time intervals), Masseter muscle electromyographic (EMG) measurement by EMG analysis (at three different positions of jaws) and bite force measured by force transducer (at two different time intervals). The obtained data were statistically analyzed by using ANOVA-F test at 5% level of significance. If the F test was significant, Least Significant Difference test was performed to test further significant differences between variables.
RESULTS
Comparison between mean differences in occlusal vertical dimension for tested groups showed that it was only statistically significant at 1 year after immediate dentures insertion. Comparison between mean differences in wavelet packet coefficients of the electromyographic signals of masseter muscles for tested groups was not significant at rest position, but significant at initial contact position and maximum voluntary clench position. Comparison between mean differences in maximum biting force for tested groups was not statistically significant at 5% level of significance.
CONCLUSION
Immediate complete overdentures whether tooth or implant supported prosthesis is recommended than totally mucosal supported prosthesis.

Keyword

Immediate denture; Implant-supported denture; Electromyography; Bite force

MeSH Terms

Bite Force
Bites and Stings
Dental Prosthesis, Implant-Supported
Denture, Complete
Denture, Overlay
Dentures
Electromyography
Humans
Masseter Muscle
Muscles
Prostheses and Implants
Tooth
Transducers
Vertical Dimension

Figure

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  Fig. 1 Lateral cephalometric x-ray with drawing of d line, as a reference measure for vertical dimension of occlusion.

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  Fig. 2 Cross section diagram of the elastic load bearing element and mounted strain gauges.

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  Fig. 3 Comparison between the mean differences in occlusal vertical dimension changes measured in mm for groups after insertion of transitional mandibular RPD (Time 1), after insertion of immediate mandibular dentures (Time 2) and after one year of immediate mandibular dentures insertion (Time 3).

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  Fig. 4 Comparison between the mean difference of wavelet packet coefficients of the electromyographic signals of masseter muscles for patients with immediate mandibular complete dentures, mucosal (Group A), tooth (Group B) and implant (Group C) supported overdentures during rest (R), initial teeth contact (IC) and maximum voluntary clench (MVC).

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  Fig. 5 Superimposed EMG signals during rest position (R), initial contact (IC) positions and maximum voluntary clench (MVC) of immediate mandibular complete denture in Group A, Group B and Group C.

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  Fig. 6 Comparison between the mean differences in maximum biting force measured in kg. for patients with immediate mandibular complete dentures groups, before insertion and after insertion of immediate mandibular dentures.

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