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Effects of Occlusal Appliances on the Mandibular Movement in Speech and the Perception of the Korean Phonemes

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Abstract

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3. °¢ ¸»¼Ò¸®ÀÇ ¹ßÀ½ ½Ã ÇϾǿ ¼Óµµ ¹× Àüü ¹®ÀåÀ» ¹ßÀ½ÇÒ ¶§ÀÇ °æ°ú½Ã°£ ¿ª½Ã ¹ßÀ½È¯°æ¿¡ µû¸¥ Â÷ÀÌ°¡ ¾ø¾úÀ¸¸ç, ¸ðµç ¿¹¹®¿¡¼­ À½¼ºÀνÄÀÇ Æò°¡Á¡¼ö´Â ÀÚ¿¬Ä¡¾Æ »óÅÂ¿Í ±³ÇùÁ¤Ä¡¸¦ Á¤ÂøÇÑ °æ¿ì °£¿¡ ºÐ¸íÇÑ Â÷À̸¦ ³ªÅ¸³»¾ú´Ù.
ÀÌ»óÀÇ ¿¬±¸¸¦ ÅëÇØ ±³ÇÕÀåÄ¡ÀÇ ÀåÂøÀº ¹ßÀ½ ½Ã ÇϾǿÀÇ Àü¹ÝÀûÀÎ ¾çÅ¿¡´Â º°´Ù¸¥ ¿µÇâÀ» ¹ÌÄ¡Áö ¾ÊÀ¸³ª Æó±¸ ¿îµ¿ Áß ½À°üÀû Æó±¸À§¿¡ ±Ù¼ºÇÏ¿© ¹ßÀ½µÇ´Â ¸»¼Ò¸®¿¡´Â ¿µÇâÀ» ¸¶ÃÄ ´ëü·Î ÇÏ¾Ç ±³ÇÕ¾ÈÁ¤ÀåÁö³ª »ó¾Ç Àü¹æÁö±×¸¦ ÀåÂøÇÑ °æ¿ì ÀÚÀÎÄ¡¾Æ »óÅ¿¡ ºñÇØ ÇÏÀÍÀÌ ÇÏ¹æ ¹× Áø¹æ¿¡ À§Ä¡ÇÏ´Â ¾ç»óÀ» º¸ÀÌ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù.

This study was performed to investigate the effects of occlusal appliances on the perception of speech and on the mandibular movement, especially, related to the range and velocity For this study, sixteen dental students, 10 male and 6 female, served as subjects Subjects were asked to read four sentences, 10 the four different speech environments speaking In natural dentition(n), with maxillary CR splint(u), with mandibular CR splint(l), and with maxillary anterior jig(J) The mandibular movements in the four different speech environments were recorded by BioEGN(Bioresearch Ine , USA) The statistical analysis" was performed using SPSS Windows"¢¥(ver 100) program The results of this study were as follows:
1. Maximal range and velocity of the mandibular movements in the four different speech environments were not significantly different from one another in all four sentences, but In some syllables pronounced during the closing movement of the Jaw, especially, nearly closed to habitual occlusal position, the vertical dimension of the syllables was statistically increased with mandibular CR splint than In natural dentition.
2. The number of syllables showing a significant anterior position from habitual occlusal position by the splints, especially mandibular CR splint or maxillary anterior jig was also larger during the closing movement than during the opening movement of the jaw.
3. The velocity of mandibular movement for each syllable and the ditration of each sentence in the four different speech environments was not significantly different, but the correlationship between the measurement in natural dentition and the measurement with splints were slightly decreased in the syllables pronounced during the closing movement
4. The evaluation scores of speech perception by two raters showed a significant correlation between them and also showed a significant difference between in natural dentition and with splints showing a better speech perception in natural denitition
It is concluded that the mandibular movements in speech are some tut influenced by occlusal splints, especially mandibular centric relation(CR) splint or maxillary anterior jig, with in the svllables pronounced during the closing movement of the Jaw showing a slightly increased vertical dimenssion ankl or anterior position.

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