Ability to adjust occlusal force in implant-supported overdenture wearers

Area of Science:

• Dental prosthetics
• Biomechanical engineering
• Oral rehabilitation

Background:

• Occlusal force control is crucial for masticatory function.
• Implant-supported overdentures (IODs) offer improved stability over conventional dentures.
• Limited data exists on the occlusal force adjusting ability of IOD wearers.

Purpose of the Study:

• To compare the occlusal force adjusting ability of individuals with IODs, natural dentition (ND), and complete dentures (CD).
• To assess functional differences in force modulation between these prosthetic and natural dentition groups.

Main Methods:

• Comparative study involving three groups: ND (19), IOD (7), and CD (14) subjects.
• Participants performed tasks involving holding and splitting food (peanuts, biscuits) using a force transducer.
• Measured outcomes included hold force, peak force rate, duration, and split force, analyzed using non-parametric tests and regression analysis.

Main Results:

• Natural dentition exhibited a significantly higher peak force rate compared to both IOD and CD groups for peanuts.
• Complete denture wearers showed a significantly longer duration for splitting food than ND and IOD groups.
• Regression analysis confirmed significant differences in peak force rate (ND vs. IOD/CD) and duration (ND vs. CD) after adjusting for age and sex.

Conclusions:

• Implant-supported overdentures provide superior occlusal force adjustment compared to complete dentures.
• While IODs enhance function, natural dentition demonstrates a higher level of occlusal force control.
• IODs represent a significant functional improvement for patients transitioning from complete dentures.