The relation between intraoral size perception and feeding behabior

2015 Fiscal Year Final Research Report

• Project/Area Number: 24593167
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Social dentistry
• Research Institution: Showa University
• Principal Investigator: TOMITA Kaori 昭和大学, 歯学部, 兼任講師 (80338532)
• Co-Investigator(Kenkyū-buntansha): TAKAHASHI Mari 昭和大学, 歯学部スペシャルニーズ口腔医学講座口腔衛生学部門, 兼任講師 (20445597) ; OOKA Takafumi 昭和大学, 歯学部スペシャルニーズ口腔医学講座口腔衛生学部門, 兼任講師 (30453632) ; MUKAI Yoshiharu 昭和大学, 名誉教授 (50110721)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: 口腔感覚 / 立体サイズ認識 / レジン / 温度 / 認識時間 / 物性 / 要因分析

Outline of Final Research Achievements

The purpose of this study is to investigate the factors which affect intraoral size perception. The pilot study revealed that time required for identification affected the direction of illusion. Long manipulation leads to overestimation and short manipulation leads to underestimation of objects size. Taking this into account, the second experiment was performed. 35 young volunteers detected the size of cylinders inserted into oral cavity blindly. Each cylinder had an identical thickness (5mm), but varied in diameter (12, 14, and16mm). After 7 seconds’ free manipulation, they drew picture of each cross section at the size that they perceived. The procedures were repeated 6 times with different types of resin (3 different temperatures in combination with 2 different textures).Most participants underestimated the cylinder size irrespective of the size, temperature, or texture. Soft pieces were more deceptive. Temperature of the objects had no effect on size perception.

Free Research Field

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