Masticatory function and bite force of mandibular single-implant overdentures and complete dentures: a randomized crossover control study

Thuy Lam Vo; Manabu Kanazawa; Khaing Myat Thu; Mari Asami; Daisuke Sato; Shunsuke Minakuchi

doi:10.1016/j.jpor.2019.03.002

Masticatory function and bite force of mandibular single-implant overdentures and complete dentures: a randomized crossover control study

J Prosthodont Res. 2019 Oct;63(4):428-433. doi: 10.1016/j.jpor.2019.03.002. Epub 2019 Apr 5.

Authors

Thuy Lam Vo¹, Manabu Kanazawa², Khaing Myat Thu¹, Mari Asami¹, Daisuke Sato³, Shunsuke Minakuchi¹

Affiliations

¹ Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
² Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan. Electronic address: m.kanazawa.gerd@tmd.ac.jp.
³ Department of Implant Dentistry, School of Dentistry, Showa University, Tokyo, Japan.

PMID: 30956160
DOI: 10.1016/j.jpor.2019.03.002

Abstract

Purpose: The study aimed to compare the mixing ability (MA), comminuting ability (CA), and maximum bite force (MBF) of single-implant overdentures (IODs) and clinically acceptable complete dentures (CDs) through a randomized crossover control trial.

Methods: New CDs were fabricated for 22 patients. One implant was inserted in the middle of the symphyseal region for each patient. The patients were randomly allocated into two groups: group IC received an IOD, whereas group CI received a CD, for 2 months; the treatments were interchanged for the next 2 months. The MA, CA, and MBF were evaluated with the old CDs, new CDs (at the end of CD treatment period), and IODs (at the end of IOD treatment period).

Results: The MA, CA, and MBF of the IODs were significantly higher than those of the old and new CDs (p < 0.01). New CDs only showed a significant improvement in MA (p < 0.05), while there were no significant differences in CA and MBF between the old and new CDs.

Conclusions: Compared with the CD, IOD is more effective in restoring the MA, CA, and MBF of edentulous mandibles.

Keywords: Edentulous mandible; Masticatory function; Maximum bite force; Randomized crossover trial; Single-implant overdenture.

Publication types

Randomized Controlled Trial

MeSH terms

Bite Force*
Dental Prosthesis, Implant-Supported*
Denture Retention
Denture, Complete*
Denture, Complete, Lower
Denture, Overlay*
Humans
Mandible
Mastication
Patient Satisfaction