Hypothesis: Feeding behavior is conjectured from occlusal condition.

2012 Fiscal Year Final Research Report

• Project/Area Number: 22592291
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Orthodontic/Pediatric dentistry
• Research Institution: Niigata University
• Principal Investigator: HAYASAKI Haruaki 新潟大学, 医歯学系, 教授 (60238095)
• Co-Investigator(Kenkyū-buntansha): HASEGAWA Hiroko 鹿児島大学, 医歯(薬)学総合研究科, 助教 (00295271) ; IWASAKI Tomonori 鹿児島大学, 医学部・歯学部附属病院, 講師 (10264433) ; YAMASAKI Youichi 鹿児島大学, 医歯(薬)学総合研究科, 教授 (30200645) ; SAITOH Issei 新潟大学, 医歯学系, 准教授 (90404540)
• Project Period (FY): 2010 – 2012
• Keywords: 捕食 / 咀嚼 / 歯列形態

Research Abstract

Because the chewing motion dramatically changes by the occlusal condition, the relationship may hold among three developmental factors: "feeding behavior ⇔ chewing motions ⇔ occlusal condition". From results of analyzing feeding behaviors and chewing motions, smaller within-individual variations, compared to between-individual variations, were observed in adults. On the other hand, it is well knownthat occlusal condition is dominated by lip closure pressure, tongue motion and masticatory muscles even in younger children. The establishment of stable motions with smaller within-individual variations is affected by these elements. Therefore it might be suggested that the occlusal condition also affectedfeeding behaviors.

Research Products

• [Journal Article] Comparison of normal permanent and primary dentition sagittal tooth-crown inclinations of Japanese females (2012)
  • Author(s): Inada E, Saitoh I, Hayasaki H, Iwase Y, Kubota N, Takemoto Y, Yamasaki Y
  • Journal Title: Cranio Volume: 30(1) Pages: 41-5
  • URL: http://www.ncbi.nlm.nih.gov/pubmed/22435176
  • Peer Reviewed
• [Journal Article] Association between mouth opening and upper body movement with intake ofdifferent-size food pieces during eating (2012)
  • Author(s): Inada E, Saitoh I, Nakakura-Ohshima K, Maruyama T, Iwasaki T, Murakami D, Tanaka M, Hayasaki H, Yamasaki Y
  • Journal Title: ArchOral Biol Volume: 57(3) Pages: 307-13
  • DOI: doi:10.1016/j.archoralbio.2011.08.023
  • Peer Reviewed
• [Journal Article] Do occlusal contact areas of maximum closing position during gum chewing and intercuspal position coincide? (2011)
  • Author(s): Iwase Y, Saitoh I, Okamoto A,Nakakura-Ohshima K, Inada E, Yamada C, Takemoto Y, Yamasaki Y, Hayasaki H
  • Journal Title: Arch Oral Biol Volume: 56(12) Pages: 1616-23
  • DOI: doi:10.1016/j.archoralbio.2011.07.004
  • Peer Reviewed