Language：English  

Clinical application of a swallowing function evaluation system that is minimally invasive and enables an objective evaluation is necessary. We constructed a system that can synchronise and analyse lip motion with a three-dimensional (3D) camera and swallowing dynamics with videofluoroscopy (VF) and clarified the relationship between lip movement and swallowing dynamics. A compact 3D camera was adapted to Microsoft XBox One Kinect Sensor® . We examined Kinect's accuracy and repeatability and analysed the highest measurement accuracy and repeatability of the distance between anguli oris muscles. The constructed system simultaneously measured, synchronised and analysed lip motion by Kinect and swallowing dynamics by VF. Fourteen elderly men without dysphagia were included. Barium turbid solution (5, 10, 15 and 20 mL) was used for swallowing. Measurement parameters were the 3D distance between angulus oris displacement (TDDD), swallowing quantity (SQ), oral transit time (OTT), stage transit duration (STD), pharyngeal transit time (PTT) and total swallowing duration (TSD). Statistical analyses were performed. The measurement accuracy and reproducibility were optimum within a 10° horizontal imaging angle at a 120-cm measurement distance. SQ, TDDD, OTT, STD, PTT and TSD showed significant differences, and correlation was found between TDDD and OTT. SQ affected TDDD, OTT, STD, PTT and TSD; OTT could be predicted from TDDD. Improvement in the system and analysis method was considered to enable prediction of swallowing dynamics from body surface movement of the head and neck, including realisation of measurement conditions with higher precision and reproducibility, and from lip motion.

DOI： 10.1111/joor.12916

Scopus

PubMed

Language：Japanese   Publisher：Archives of Oral Biology  

Objective: Childhood is an important period for lip-closing strength (LCS) development, and failure to acquire LCS during childhood leads to various adverse health effects, such as mouth breathing. The purpose of this study was to examine the effectiveness of device-free lip and facial training in preschool children. Design: The participants were divided into training and control groups. Both groups comprised 123 children aged 3–4 years, and only the training group received lip and facial training (i.e., opening and closing the lips and protruding the tongue) for 1 year. A two-way repeated measures analysis of variance was applied to compare the interaction effects of LCS and facial linear distance and angle by year (initial year vs. 1 year later) and group (training vs. control group). In addition, paired t-tests were used to test the changes in LCS and facial linear distance and angle after 1 year in both groups. Furthermore, the same analysis was performed in children with weak LCS in both groups (incompetent lip seal [ILS]). Results: The LCS of children in the training group significantly increased after training compared with that in the control group, whether the analysis included all children or children with ILS alone. Lip and facial training for children with ILS reduced both the upper and lower lip protrusion; children with ILS without training had increased lip protrusion after 1 year. Conclusions: Lip and facial training for children with ILS effectively improved LCS and lip morphology, thereby preventing increased lip protrusion.

DOI： 10.1016/j.archoralbio.2023.105761

Scopus

PubMed

Language：Japanese   Publisher：Journal of Oral Rehabilitation  

Background: Evaluating mouth rinsing skills is useful for assessing oral function, however current evaluation methods are subjective. Objectives: This study compared mouth rinsing between adults and children using a contactless camera to capture lip motion. Methods: The subjects comprised 16 adults and 13 children with no oral dysfunction. A compact vital sensing camera adapted from a Microsoft Xbox One Kinect Sensor® (Kinect) was placed 100 cm from the floor and 120 cm from the subject; 5, 10 and 15 ml of water were used as samples. Participants were instructed to hold the sample in the oral cavity, close the lips and move the sample alternatively left and right for 15 s. Maximum/minimum displacement from the reference plane and rinsing cycle for each sample were analysed by one-way analysis of variance. Results: In adults, there was no significant difference in the maximum/minimum displacement between the left and right sides of the angulus oris due to differences in sample amount. In children, the right maximum significantly differed between the 5- and 15-ml and 10- and 15-ml samples, while the left maximum significantly differed between the 5- and 10-ml and 5- and 15-ml samples. The right minimum significantly differed between the 5- and 10-ml samples, as did the duration of mouth rinsing between the 5- and 15-ml samples. Conclusions: In children, lip movement and mouth rinsing duration tended to decrease with increasing sample volume. Evaluating lip movement using a contactless vital sensing camera is useful for assessing children's development of oral function.

DOI： 10.1111/joor.13379

Scopus

PubMed

Language：Japanese   Publisher：鹿児島県小児保健協会  

鹿児島県内のX小学校の児童859名を対象とし、学校歯科健診時に口腔機能の評価(口腔機能健診)を行うとともに、保護者に対して児の口腔機能に関するアンケートを行った。アンケートの結果、食事のときに咬む力の強さについて尋ねた質問に対し、「弱い」と答えた割合が7%、「強い」が4%、「普通」が89%であった。食事のとき一口の噛む時間を尋ねた質問に対し、「短い」が26%、「長い」が11%、「適切」が63%であった。食事のとき左右のどちらに偏って噛むか?の問いに「はい」と答えたのは15%であった。食べ物を飲み込むときに舌が出るか?の問いに「はい」と答えたのは2%であった。話し言葉は明瞭か?の問いに「いいえ」と答えたのは8%であった。普段、口が開いていることがあるか?の問いに「はい」と答えたのは53%であった。いつも口で呼吸しているか?の問いに「はい」と答えたのは13%であった。口腔機能健診での評価項目は「口唇乾燥の有無・程度」「舌苔付着の有無・程度」「舌の挙上域」「口蓋扁桃肥大の有無・程度」とし、口腔乾燥があった児の割合は33%、舌苔付着があったのは38%、舌挙上不全があったのは17%、口蓋扁桃肥大があったのは35%であった。これらの結果から、口腔機能の発達に課題を抱える児が一定多数存在することが明らかになった。また、保護者アンケートの結果と口腔機能健診結果には差があり、保護者による口腔機能発達不全の認識は難しいことが示唆された。

Language：Japanese   Publisher：(公財)大和証券ヘルス財団  

嚥下時における口唇動作の数値化から嚥下動態の予測を試みた。摂食嚥下障害のない高齢男性14名を対象として、小型3Dカメラによる口唇動作の撮影と嚥下造影検査(VF)による嚥下動態の撮影を同時に行った。同時に測定した口唇動作と嚥下動態を同期させ、解析するシステムを構築した。試料はバリウム混濁液5mL、10mL、15mL、20mLとし、被験者に嚥下させた。3次元位置情報の口角間距離の変位量(TDDD)およびVF映像に基づいた試料通過時間をOTT(口腔相)、STD(口腔咽頭相)、PTT(咽頭相)、TSD(全相)と定義し、関連性を解析した。嚥下量とTDDD、OTT、STD、PTT、TSDに有意差を認め、2変量間で相関関係も認められた。TDDDとOTTには正相関があった。統計学的検討の結果、嚥下量は3次元的口角間距離、OTT、STD、PTT、TSDに影響を及ぼし、TDDDからOTTの予測は可能であることが示唆された。

Language：Japanese   Publisher：(株)ニュー・サイエンス社  

オンライン嚥下機能診断システムを開発する目的で、非接触型バイタルセンシング技術を搭載した小型3Dカメラによる嚥下機能診断の実証実験を実施した。小型3DカメラであるKinectと嚥下造影検査(VF)の同時撮影・同期システムを構築し、Kinectから得られるマーカーレス3次元位置情報およびVF映像とVFで得られる体内嚥下動態映像を音声情報に基づいて同期ソフトウェアで時間的同期を実施する。3次元位置情報の口角間距離の変位量およびVF映像に基づいた試料通過時間を口腔相、口腔咽頭相、咽頭相、全相と定義し、関連性について解析した。結果、1回嚥下量が増加すると口腔期における嚥下時間が増加し、口角距離の変位量も増加した。口角変位量の検出は嚥下機能を診断するのに有効であることが示された。将来的にはスマートフォンを用いたオンライン嚥下機能診断システムの構築を目指す。(著者抄録)

Authorship：Lead author  

Language：Japanese   Publisher：鹿児島県小児保健協会  

Language：Japanese   Publisher：(公社)日本小児歯科学会  

Language：Japanese   Publisher：(NPO)日本睡眠歯科学会  

Language：Japanese  

Language：Japanese  

Language：Japanese  

Language：Japanese  

Language：Japanese  

Application no：特願PCT/JP2018/015342 

Application no：特願2017-082001 

Award type：Award from Japanese society, conference, symposium, etc.  Country：Japan

Award type：Award from Japanese society, conference, symposium, etc.  Country：Japan