記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Journal of Oral Rehabilitation  

Background: Intra-oesophageal acid stimulation increases masseter muscle activity. However, the infusion speeds used in previous studies are significantly slow, with minimal acid volume (30 mL over 30 min). Additionally, it is unclear how masseter muscle activity, symptoms of discomfort, stress levels and saliva quantity change over time. Objectives: The time course of masseter muscle activity, heartburn and discomfort symptoms, salivary cortisol concentration to assess stress, autonomic nervous system (ANS) activity and saliva quantity under the influence of intra-oesophageal acid infusion were evaluated at a faster injection rate and larger volume than in previous studies. Methods: Ten healthy adults underwent polygraphic monitoring, consisting of electromyography of the masseter muscle and electrocardiography during intra-oesophageal acid infusion (10 mL/min, 10 min). Symptoms of heartburn and discomfort were assessed using the visual analogue scale (VAS), and saliva quantity was measured. Friedman's test was used for multiple comparisons. Results: Masseter muscle activity, VAS scores for heartburn and discomfort, as well as saliva quantity during the 10-min acid infusion, increased significantly compared with that before acid infusion (p < 0.001, 0.001, 0.019 and 0.047, respectively) and decreased 10 and 20 min after acid infusion (p = 0.004, 0.004 and 0.007, respectively). No significant changes were observed in the salivary cortisol concentration or ANS activity. Conclusion: Intra-oesophageal acid infusion stimulated symptoms of heartburn and discomfort and increased masseter muscle activity and saliva production, which may not be related to psychological stress.

DOI： 10.1111/joor.13905

Scopus

PubMed

記述言語：英語   出版者・発行元：Clinical and Experimental Dental Research  

Objectives: Late-stage secondary alveolar bone grafting (SBG) has a poor prognosis; however, the case selection and timing of orthodontic treatment have not been thoroughly investigated. This study aimed to clarify the prognosis of early-SBG and late-SBG in patients with unilateral or bilateral cleft lip and palate. Materials and Methods: Fifty-six patients underwent early-SBG performed before the eruption of the cleft-adjacent lateral incisors or canines (early-SBG group). Ten patients underwent late-SBG requiring significant tooth movement for gap closure; SBG was performed before phase II treatment for treatment efficiency, and tooth movement began approximately 3 months post-SBG (late-SBG group). Pre-SBG cleft width was measured; bone-bridge formation using the Chelsea scale and cleft gap closure post-SBG were evaluated. Types A and C bone bridges were considered adequate. These items were statistically compared between groups. Results: Cleft width in the early-SBG group was significantly smaller than that in the late-SBG group (p < 0.001). There were no significant differences in the percentage of adequate bone-bridge formation (p = 0.055) and cleft-gap closure (p = 1.000) between groups. However, the ratio of type A bone bridges was significantly higher in the early-SBG group than in the late-SBG group (p = 0.035). Conclusion: These results suggest that, even in late-SBG, early orthodontic tooth movement to the graft bone leads to the formation of an adequate bone bridge, similar to early-SBG. However, the maintenance of cervical grafted bone after late-SBG may be less than that after early-SBG.

DOI： 10.1002/cre2.70116

Scopus

PubMed

記述言語：英語   掲載種別：研究論文（学術雑誌）   出版者・発行元：Journal of Oral Rehabilitation  

Background: Masseter muscle activity during wakefulness may be associated with temporomandibular disorder (TMD)-related symptoms, psychosocial status and pain-related disability; however, this relationship is unclear. Objectives: This study aimed to determine the relationship between masseter muscle electromyography (EMG) burst/duration during wakefulness and TMD-related symptoms, psychosocial status and pain-related disability. Methods: Sixty participants were assessed masseter muscle activity during wakefulness using a data-logger-type ultraminiature EMG system and TMD-related symptoms, psychosocial status and pain-related disability through Axis I and II of the diagnostic criteria for TMD (DC/TMD). EMG bursts lasting longer than 0.25 s but less than 2.0 s and those lasting longer than 2.0 s were classified as phasic and tonic bursts, respectively. Results: Participants with palpation-related pain in the temporalis and masseter muscles, as assessed through the DC/TMD examination form in Axis I, had more bursts (number/h) (p =.035 and p =.009, respectively) and longer duration (time/h) (p =.013 and p =.004, respectively) of tonic bursts of the masseter muscle during wakefulness. Participants with palpation-related pain in the masseter muscles had higher oral behaviour scores during wakefulness using Axis II (p =.001), which affected the number and duration of tonic bursts of the masseter muscle activity during wakefulness (p =.011 and p =.007, respectively). Conclusion: As tonic bursts mainly reflect clenching, individuals with pain in the masseter muscles by palpation may have a high frequency and longer duration of clenching, as well as a high frequency of oral behaviours during wakefulness.

DOI： 10.1111/joor.13617

Scopus

PubMed

記述言語：日本語   出版者・発行元：九州矯正歯科学会  

近年,歯科矯正用アンカースクリューを用いた治療により,矯正歯科治療方法の選択肢が広がっている.我々は,上下顎前突症例のマルチブラケット装置による治療において,歯科矯正用アンカースクリューを用いて上下顎歯列の遠心移動を行い,非抜歯による治療で良好な結果が得られたため報告する.患者は初診時年齢が24歳3ヵ月の女性で,主訴は上顎前歯が出ていることと下顎前歯部の叢生であった.上下顎前突の改善のために,歯科矯正用アンカースクリューによる上下顎歯列の遠心移動を行った.動的治療期間は1年6ヵ月で上顎歯列は約3.5mm遠心移動,下顎歯列は約2.5mm遠心移動した.保定2年後も概ね良好な咬合を維持している.(著者抄録)

記述言語：日本語   出版者・発行元：(公社)日本矯正歯科学会  

上顎前歯の突出,口唇閉鎖不全および前歯部の咀嚼障害を主訴に来院した初診時年齢16歳5ヵ月の女性にマルチブラケット装置による矯正歯科治療を行い,良好な治療結果を得たので報告する.患者は過大なoverjetを伴う骨格性II級を呈していた.口蓋正中に歯科矯正用アンカースクリューを植立し,上顎両側第一小臼歯を抜去して,前歯の圧下を伴う後方移動を行った.上顎前歯の移動量は大きかったが,歯根吸収はわずかであった.保定開始から2年6ヵ月が経過し,機能的にも良好な咬合が獲得された.(著者抄録)

記述言語：日本語   掲載種別：記事・総説・解説・論説等（学術雑誌）  

開催年月日： 2025年4月

記述言語：英語   会議種別：ポスター発表  

開催地：Philadelphia   国名：アメリカ合衆国  

開催年月日： 2025年3月

記述言語：日本語   会議種別：ポスター発表  

開催地：福岡   国名：日本国  

開催年月日： 2024年10月

記述言語：日本語   会議種別：口頭発表（一般）  

開催地：横浜   国名：日本国  

開催年月日： 2024年10月

記述言語：日本語   会議種別：ポスター発表  

開催地：横浜   国名：日本国  

開催年月日： 2024年8月

記述言語：日本語  

開催地：鹿児島