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. 2017 Feb;67(1):29-37.
doi: 10.1111/idj.12256. Epub 2016 Sep 29.

Influence of time and different tooth widths on masticatory efficiency and muscular activity in bilateral free-end saddles

Mohammed Assayed Mousa  1 , Edward Lynch  2 , Mohd G Sghaireen  1 , Abdalwhab M A Zwiri  1 , Osama A Baraka  3
Affiliations

Influence of time and different tooth widths on masticatory efficiency and muscular activity in bilateral free-end saddles

Mohammed Assayed Mousa et al. Int Dent J. 2017 Feb.

Abstract

Purpose: To evaluate the influence of time on masticatory efficiency and muscular activity during mastication of different types of test foods in participants fitted with a lower bilateral free-end saddle removable partial denture (RPD) with wide or narrow teeth.

Methods: Thirty-six participants consented to undergo evaluation of their masticatory efficiency and recording of their muscular activity, while they wore an RPD with a unified bilateral design, during mastication of different types of test foods. The width of the artificial teeth was changed as follows. Initially (A), the length was adjusted so that the distal end of the mandibular second molars occluded with the distal end of the maxillary second molar (buccolingual width of 7-8 mm). Next (B), the width was decreased to half the maxillary second molars (buccolingual width of only 5 mm). A statistical analysis was performed using SAS software. One-way analysis of variance (ANOVA) was performed followed by Duncan's multiple range tests.

Results: At the 2-month follow-up visit, wider teeth demonstrated greater masticatory efficiency than narrower teeth. However, after 4 months, no significant differences were observed between the two tooth widths. No significant differences in muscular activity were observed.

Conclusion: A reduction of the occlusal table width in free-end saddle RPDs resulted in decreased masticatory efficiency 2 months after denture fabrication, but there was no significant difference in muscular activity between narrow and wide teeth. However, after 4 months, the masticatory efficiency of the participants with narrower teeth improved without any changes in muscular activity.

Keywords: Kennedy class I; Masseter; electromyographic; masticatory efficiency; muscle activity; narrow teeth; temporalis.

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References

    1. Xie Q, Ding T, Yang G. Rehabilitation of oral function with removable dentures – still an option? J Oral Rehabil. 2015;42:234–242. - PubMed
    1. Zlatarić DK, Celebić A, Valentić-Peruzović M. The effect of removable partial dentures on periodontal health of abutment and non-abutment teeth. J Periodontol. 2002;73:137–144. - PubMed
    1. Wright PS, Hellyer PH, Beighton D, et al. Relationship of removable partial denture use to root caries in an older population. Int J Prosthodont. 1992;5:39–46. - PubMed
    1. Kawataa T, Kawaguchia T, Yodaa N, et al. Effects of a removable partial Denture and its rest location on the forces exerted on an abutment tooth in vivo. Int J Prosthodont. 2008;21:50–52. - PubMed
    1. Itoh H, Baba K, Aridome K, et al. Effect of direct retainer and major connector designs on RPD and abutment tooth movement dynamics. J Oral Rehabil. 2008;35:810–815. - PubMed