The Change of Multidirectional Lip-Closing Force by Lip Closure Training: The Effect of Continuing and Discontinuing Training

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  • YAMADA Shinji
    Department of Special Needs Dentistry, Matsumoto Dental University
  • OGASAWARA Tadashi
    Department of Special Needs Dentistry, Matsumoto Dental University
  • OKADA Yoshiyuki
    Department of Special Needs Dentistry, Matsumoto Dental University
  • IZAWA Masayuki
    Department of Special Needs Dentistry, Matsumoto Dental University
  • ISONO Kazuhiro
    Department of Special Needs Dentistry, Matsumoto Dental University
  • MASUDA Yuji
    Department of Oral and Maxillofacial Biology, Graduate School of Oral Medicine, Matsumoto Dental University
  • HAISHIMA Hiroyuki
    Department of Oral Function Rehabilitation Center, Matsumoto Dental University Hospital

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Other Title
  • 口唇閉鎖訓練の継続と中止による口唇閉鎖力の変化
  • コウシン ヘイサ クンレン ノ ケイゾク ト チュウシ ニ ヨル コウシン ヘイサリョク ノ ヘンカ

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Abstract

<p>The purpose of this study was to examine the change of multidirectional lip-closing force in continuing and discontinuing button-pull exercise training. The subjects were 15 healthy males (mean age: 30.1±1.8 years). One set of button-pull exercises consisted of performing button-pull exercises 7 times for 1 min. The subjects carried out 3 sets of button-pull exercises every day for 4 weeks. After 4 weeks of training, the button-pull exercises were discontinued. The multidirectional lip-closing force was measured every week for 8 weeks by the multidirectional lip-closing force measurement system.</p><p>The multidirectional lip-closing force of the center part of the upper and lower lips, and that of the right oblique upper part were significantly increased by the exercises after 3 weeks. The multidirectional lipclosing force was not significantly different between 3 weeks and 4 weeks. It is suggested that the buttonpull exercises require a certain training period, and that the lip-closing force achieved by training reaches a plateau after a certain period of time.</p><p>After discontinuing the training, there was a significant decrease of lip-closing force in 2 weeks. Therefore, it is important to continue button-pull exercises. The lip-closing force is large in the center part of the upper and lower lip, and is weak at the corner of the mouth. Thus, it was found that there is directional specificity in multidirectional lip-closing force.</p>

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