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


CONCLUSIONS
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.
Aljouf University, Sakaka, Aljouf, Saudi Arabia.
Mohammed Assayed
http://orcid.org/0000-0002-6268-6824
MA
Mousa
Dentistry, Warwick Medical School, University of Warwick, Coventry, UK.
Edward
E
Lynch
Aljouf University, Sakaka, Aljouf, Saudi Arabia.
Mohd G
MG
Sghaireen
Aljouf University, Sakaka, Aljouf, Saudi Arabia.
Abdalwhab M A
AM
Zwiri
Taibah University, Almadinah Almonawarah, Saudi Arabia.
Osama A
OA
Baraka
D003832:Denture, Partial, Removable / Q000009:adverse effects; D004576:Electromyography; D005260:Female; D006801:Humans; D008297:Male; D008406:Masseter Muscle / Q000502:physiology; D008409:Mastication / Q000502:physiology*; D008410:Masticatory Muscles / Q000502:physiology*; D008875:Middle Aged; D008963:Molar / Q000033:anatomy & histology; D014070:Tooth / Q000033:anatomy & histology*
Kennedy class I; Masseter; electromyographic; masticatory efficiency; muscle activity; narrow teeth; temporalis
J Oral Rehabil. 2008 Nov;35(11):810-5
18482346
J Med Dent Sci. 2002 Mar;49(1):11-8
12160222
J Oral Rehabil. 2008 May;35(5):345-52
18405270
J Neurophysiol. 1993 Jan;69(1):95-108
8433136
J Clin Periodontol. 2014 May;41(5):497-503
24527750
J Oral Rehabil. 2015 Mar;42(3):234-42
25327636
J Oral Rehabil. 2003 Mar;30(3):278-82
12588500
J Prosthet Dent. 1998 Jul;80(1):58-66
9656179
Int J Prosthodont. 2008 Jan-Feb;21(1):50-2
18350947
Int J Prosthodont. 1998 Mar-Apr;11(2):125-32
9709601
J Oral Rehabil. 1986 Mar;13(2):127-36
3457132
Angle Orthod. 2002 Feb;72(1):21-7
11843269
J Electromyogr Kinesiol. 2006 Oct;16(5):498-505
16291500
J Periodontol. 2002 Feb;73(2):137-44
11895277
Int J Dent. 2013;2013:351279
23737788
J Prosthodont Res. 2010 Jan;54(1):24-8
19837023
Contemp Clin Dent. 2010 Apr;1(2):103-6
22114393
J Dent Res. 1994 Oct;73(10):1646-56
7929979
J Prosthet Dent. 1996 Mar;75(3):269-75
8648573
J Prosthet Dent. 2011 May;105(5):338-46
21530760
J Oral Rehabil. 2011 Nov;38(11):810-7
21561465
J Oral Rehabil. 2003 Mar;30(3):301-6
12588504
Braz Oral Res. 2014;28:
24918363
J Oral Rehabil. 2005 Jun;32(6):411-7
15899019
J Oral Rehabil. 2003 Sep;30(9):927-35
12950975
Arch Oral Biol. 2001 Jul;46(7):641-8
11369319
Int J Prosthodont. 1992 Jan-Feb;5(1):39-46
1520442
Arch Oral Biol. 2004 Mar;49(3):193-8
14725810
J Oral Rehabil. 2006 May;33(5):335-40
16629891
J Oral Rehabil. 2003 Jan;30(1):68-73
12485386
J Oral Rehabil. 2002 Jan;29(1):44-51
11844031
Int J Prosthodont. 2012 Sep-Oct;25(5):472-9
22930769
J Med Dent Sci. 2004 Jun;51(2):115-9
15508519
Showa Shigakkai Zasshi. 1990 Sep;10(3):255-63
2130411
J Prosthet Dent. 1998 Apr;79(4):422-9
9576317
J Prosthet Dent. 2006 Jun;95(6):407-11
16765149
J Oral Rehabil. 2008 Aug;35(8):638-45
18466277
J Oral Rehabil. 2005 Oct;32(10):708-13
16159347
Cranio. 2005 Apr;23(2):130-7
15898569
Acta Odontol Scand. 1978;36(1):33-41
273364
Pro Fono. 2008 Oct-Dec;20(4):225-30
19142464
Gerodontology. 2012 Jun;29(2):e1059-66
22229790
J Prosthet Dent. 1996 Oct;76(4):394-402
8897297
J Orofac Pain. 1997 Winter;11(1):24-36
10332308