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Hozawa M, Nakamura Y, Sotome T, Nakajima T, Hanasaki M, Sasakawa Y, Tsukuno S, Yonemoto Y, Hayasaki H. Evaluation of oral function using a composite sensor during maximum lip closure and swallowing in normal children and adults. J Oral Rehabil 2024. [PMID: 38641860 DOI: 10.1111/joor.13705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 10/18/2023] [Accepted: 04/11/2024] [Indexed: 04/21/2024]
Abstract
BACKGROUND There is growing interest in the development of objective methods for assessing lip-closing function in children. OBJECTIVE To obtain normative data for healthy children in the developmental stages of lip closure function, we quantitatively evaluated oral movements associated with lip closure in children and adults using a composite sensor (CS). METHODS Twenty-five normal children (11 boys, 14 girls) aged 8.8 ± 1.6 years and 25 young adults (13 men, 12 women) aged 27.4 ± 3.9 years were asked to perform test movements, maximal lip closure and swallowing of 3 mL of water. Lip-closing pressure (LP), intraoral baro-pressure (IP) and electromyographic (EMG) activity of the upper orbicularis oris muscle were simultaneously recorded using the CS. RESULTS EMG activity of the upper orbicularis oris muscle during closure was significantly greater in adults than in children. There were significant positive correlations between integral values of LP and EMG for closure in adults (r = .527, p = .008) but not in children, and significant positive correlations between integral values of LP and IP for swallowing in children (r = .508, p = .010) but not in adults. CONCLUSIONS The CS may provide an effective tool for evaluating lip function in children acquiring oral function. For the combination of maxillary orbicularis oculus contraction and formation of intraoral negative pressure, EMG activity of the upper orbicularis oris muscle involvement in LP and IP involvement in LP may differ between children and adults.
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Affiliation(s)
- Mio Hozawa
- Division of Pediatric Dentistry, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Yuki Nakamura
- Division of Pediatric Dentistry, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Tetsuya Sotome
- Division of Pediatric Dentistry, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Tsutomu Nakajima
- Division of Pediatric Dentistry, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Mika Hanasaki
- Division of Pediatric Dentistry, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Yuki Sasakawa
- Division of Pediatric Dentistry, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Saeko Tsukuno
- Division of Pediatric Dentistry, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Yuki Yonemoto
- Division of Pediatric Dentistry, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Haruaki Hayasaki
- Division of Pediatric Dentistry, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
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Masutomi Y, Goto T, Ichikawa T. Mouth breathing reduces oral function in adolescence. Sci Rep 2024; 14:3810. [PMID: 38360938 PMCID: PMC10869721 DOI: 10.1038/s41598-024-54328-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Accepted: 02/11/2024] [Indexed: 02/17/2024] Open
Abstract
Although humans breathe naturally through the nostrils, mouth breathing in children has recently gathered attention. In this study, we hypothesized that tongue function and its related maxillofacial morphology would affect breathing in adolescence. To verify this hypothesis, we examined the association between breathing patterns, including mouth and nasal breathing; oral functions, including tongue motor function; and craniofacial morphology during adolescence, which has not been investigated till date. C3-H, which indicates the anteroposterior position of the hyoid bone in relation to the third cervical vertebra, was significantly smaller in mouth-breathers than in nasal-breathers. Lip-closing force, tongue pressure, and masticatory efficiency were lower in the order of nasal-breathers, oronasal-breathers, and mouth-breathers, and the values for mouth-breathers were significantly lower than those for nasal-breathers. Tongue pressure alone was identified as a significant independent variable, with an odds ratio of 1.063 (95% confidence interval, 1.006-1.123; p < 0.05). Our results indicate a relationship between mouth breathing and the lip-closing force, tongue pressure, and masticatory efficiency, as well as the significance of tongue pressure on mouth breathing in adolescents. The findings highlight the importance of clarifying the pathophysiology of mouth breathing and its underlying causes.
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Affiliation(s)
- Yukako Masutomi
- Department of Prosthodontics and Oral Rehabilitation, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto, Tokushima, 770-8504, Japan
| | - Takaharu Goto
- Department of Prosthodontics and Oral Rehabilitation, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto, Tokushima, 770-8504, Japan.
| | - Tetsuo Ichikawa
- Department of Prosthodontics and Oral Rehabilitation, Tokushima University Graduate School of Biomedical Sciences, 3-18-15 Kuramoto, Tokushima, 770-8504, Japan
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Otsugu M, Sasaki Y, Mikasa Y, Kadono M, Sasaki H, Kato T, Nakano K. Incompetent lip seal and nail biting as risk factors for malocclusion in Japanese preschool children aged 3-6 years. BMC Pediatr 2023; 23:532. [PMID: 37884943 PMCID: PMC10601139 DOI: 10.1186/s12887-023-04366-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 10/14/2023] [Indexed: 10/28/2023] Open
Abstract
BACKGROUND Malocclusion is a multifactorial condition associated with genetic and environmental factors. The purpose of this study was to investigate the prevalence of occlusal traits, oral habits, and nose and throat conditions by age and to assess the association between malocclusion and its environmental factors in Japanese preschool children. METHODS A total of 503 Japanese children (258 boys and 245 girls aged 3-6 years) were recruited. Occlusal traits were assessed visually to record sagittal, vertical, and transverse malocclusion, and space discrepancies. Lip seal was recorded by an examiner, and oral habits (finger sucking, lip sucking or lip biting, nail biting, chin resting on a hand) and nose and throat conditions (tendency for nasal obstruction, allergic rhinitis, palatine tonsil hypertrophy) were assessed by a questionnaire completed by the parents. The prevalence of each item was calculated, and binary logistic regression was used to examine the factors related to malocclusion. RESULTS 62.0% of preschool children in the present study exhibited malocclusion, and 27.8% exhibited incompetent lip seal. Nail biting was the most frequent oral habit with a prevalence of 18.9%. Nasal obstruction was recorded in 30.4% of children. The results of binary logistic regression showed that incompetent lip seal was significantly related to malocclusion, and that nail biting was significantly negatively related. CONCLUSIONS Incompetent lip seal is significantly associated with malocclusion, but nail biting may not necessarily be a deleterious habit for the occlusion in Japanese preschool children.
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Affiliation(s)
- Masatoshi Otsugu
- Department of Pediatric Dentistry, Osaka University Graduate School of Dentistry, 1-8 Yamada-oka, Suita, 565-0871 Osaka Japan
| | - Yumi Sasaki
- Department of Pediatric Dentistry, Osaka University Graduate School of Dentistry, 1-8 Yamada-oka, Suita, 565-0871 Osaka Japan
| | - Yusuke Mikasa
- Department of Pediatric Dentistry, Osaka University Graduate School of Dentistry, 1-8 Yamada-oka, Suita, 565-0871 Osaka Japan
| | - Maika Kadono
- Department of Pediatric Dentistry, Osaka University Graduate School of Dentistry, 1-8 Yamada-oka, Suita, 565-0871 Osaka Japan
| | - Hidekazu Sasaki
- Department of Pediatric Dentistry, Osaka University Graduate School of Dentistry, 1-8 Yamada-oka, Suita, 565-0871 Osaka Japan
| | - Takafumi Kato
- Department of Oral Physiology, Osaka University Graduate School of Dentistry, Osaka, Japan
| | - Kazuhiko Nakano
- Department of Pediatric Dentistry, Osaka University Graduate School of Dentistry, 1-8 Yamada-oka, Suita, 565-0871 Osaka Japan
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Inada E, Kaihara Y, Nogami Y, Murakami D, Kubota N, Tsujii T, Kiyokawa Y, Sawami T, Yamamoto Y, Ban Y, Oku Y, Oku T, Saitoh I. Lip and facial training improves lip-closing strength and facial morphology. Arch Oral Biol 2023; 154:105761. [PMID: 37421827 DOI: 10.1016/j.archoralbio.2023.105761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 06/23/2023] [Accepted: 07/02/2023] [Indexed: 07/10/2023]
Abstract
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.
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Affiliation(s)
- Emi Inada
- Department of Pediatric Dentistry, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan.
| | - Yasutaka Kaihara
- Department of Dental Hygiene, Ogaki Women's College, 1-109 Nishinokawa-cho, Ogaki-shi, Gifu 503-8554, Japan
| | - Yukiko Nogami
- Department of Pediatric Dentistry, Asahi University School of Dentistry, 1851-1 Hozumi, Gifu 501-0296, Japan
| | - Daisuke Murakami
- Department of Pediatric Dentistry, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | - Naoko Kubota
- Department of Pediatric Dentistry, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | - Toshiya Tsujii
- Department of Pediatric Dentistry, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | - Yuki Kiyokawa
- Department of Pediatric Dentistry, Asahi University School of Dentistry, 1851-1 Hozumi, Gifu 501-0296, Japan
| | - Tadashi Sawami
- Department of Pediatric Dentistry, Asahi University School of Dentistry, 1851-1 Hozumi, Gifu 501-0296, Japan
| | - Yushi Yamamoto
- Department of Pediatric Dentistry, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | - Yusuke Ban
- Department of Pediatric Dentistry, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | - Yoichiro Oku
- Department of Pediatric Dentistry, Kagoshima University Graduate School of Medical and Dental Sciences, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | - Takeshi Oku
- Oku Pediatric and Orthodontic Dental Clinic, 5-4-27 Tagami, Kagoshima 890-0034, Japan
| | - Issei Saitoh
- Department of Pediatric Dentistry, Asahi University School of Dentistry, 1851-1 Hozumi, Gifu 501-0296, Japan
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Inada E, Saitoh I, Kaihara Y, Murakami D, Nogami Y, Kiyokawa Y, Tanaka R, Sakata K, Yamasaki Y. Factors related to mouth breathing syndrome in preschool children and the effects of incompetent lip seal: An exploratory study. Clin Exp Dent Res 2022; 8:1555-1560. [PMID: 36106473 PMCID: PMC9760156 DOI: 10.1002/cre2.661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2022] [Revised: 08/12/2022] [Accepted: 08/27/2022] [Indexed: 01/26/2023] Open
Abstract
OBJECTIVES A set of orofacial signs and symptoms completely or partially present in individuals who replace the correct pattern of nasal breathing with an oral or mixed pattern is defined as mouth breathing syndrome (MBS). In a previous report, it was clarified that an incompetent lip seal (ILS) affected the occurrence of MBS among primary school children. However, the factors related to MBS and the effect of ILS in preschool children remain unclear. The purpose of this study was to clarify the factors relevant to MBS in preschool children and investigate the relationship of ILS to MBS. MATERIAL AND METHODS We surveyed 285 preschool children between 3 and 5 years of age. Their guardians completed the questionnaire, which consisted of 44 questions regarding the children's daily health conditions and lifestyle habits. To classify the closely related questions into their respective factors and to examine the strength of the correlation between the newly revealed factors, an exploratory factor analysis with promax rotation was performed. RESULTS The factor analysis identified nine items representing four factors. Factors 1-4 were defined as "diseases of the nose," "ILS," "problem with swallowing and chewing," and "eating and drinking habits," respectively. Factor 2 most strongly correlated with Factor 1, and both Factors showed a relatively strong correlation with Factor 3. CONCLUSIONS The initial stage of MBS may be present in preschool children. ILS and diseases of the nose can cause poor development of oral functions, such as breathing and eating.
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Affiliation(s)
- Emi Inada
- Department of Pediatric DentistryKagoshima University Graduate School of Medical and Dental SciencesKagoshimaJapan
| | - Issei Saitoh
- Department of Pediatric DentistryAsahi University School of DentistryGifuJapan
| | | | - Daisuke Murakami
- Department of Pediatric DentistryKagoshima University Graduate School of Medical and Dental SciencesKagoshimaJapan
| | - Yukiko Nogami
- Division of Pediatric Dentistry, Graduate School of Medical and Dental ScienceNiigata UniversityNiigataChuo‐kuJapan
| | - Yuki Kiyokawa
- Department of Pediatric DentistryAsahi University School of DentistryGifuJapan,Division of Pediatric Dentistry, Graduate School of Medical and Dental ScienceNiigata UniversityNiigataChuo‐kuJapan
| | - Reira Tanaka
- Department of Pediatric DentistryAsahi University School of DentistryGifuJapan
| | - Kensuke Sakata
- Department of Pediatric DentistryAsahi University School of DentistryGifuJapan
| | - Youichi Yamasaki
- Department of Pediatric DentistryKagoshima University Graduate School of Medical and Dental SciencesKagoshimaJapan
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Lin L, Zhao T, Qin D, Hua F, He H. The impact of mouth breathing on dentofacial development: A concise review. Front Public Health 2022; 10:929165. [PMID: 36159237 PMCID: PMC9498581 DOI: 10.3389/fpubh.2022.929165] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Accepted: 08/24/2022] [Indexed: 01/24/2023] Open
Abstract
Mouth breathing is one of the most common deleterious oral habits in children. It often results from upper airway obstruction, making the air enter completely or partially through oral cavity. In addition to nasal obstruction caused by various kinds of nasal diseases, the pathological hypertrophy of adenoids and/or tonsils is often the main etiologic factor of mouth breathing in children. Uncorrected mouth breathing can result in abnormal dental and maxillofacial development and affect the health of dentofacial system. Mouth breathers may present various types of growth patterns and malocclusion, depending on the exact etiology of mouth breathing. Furthermore, breathing through the oral cavity can negatively affect oral health, increasing the risk of caries and periodontal diseases. This review aims to provide a summary of recent publications with regard to the impact of mouth breathing on dentofacial development, describe their consistencies and differences, and briefly discuss potential reasons behind inconsistent findings.
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Affiliation(s)
- Lizhuo Lin
- Hubei-MOST KLOS & KLOBM, School & Hospital of Stomatology, Wuhan University, Wuhan, China,Department of Orthodontics, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Tingting Zhao
- Hubei-MOST KLOS & KLOBM, School & Hospital of Stomatology, Wuhan University, Wuhan, China,Department of Orthodontics, School & Hospital of Stomatology, Wuhan University, Wuhan, China,Center for Dentofacial Development and Sleep Medicine, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Danchen Qin
- Hubei-MOST KLOS & KLOBM, School & Hospital of Stomatology, Wuhan University, Wuhan, China,Department of Orthodontics, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Fang Hua
- Department of Orthodontics, School & Hospital of Stomatology, Wuhan University, Wuhan, China,Center for Dentofacial Development and Sleep Medicine, School & Hospital of Stomatology, Wuhan University, Wuhan, China,Center for Evidence-Based Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, China,Division of Dentistry, School of Medical Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, United Kingdom,*Correspondence: Fang Hua
| | - Hong He
- Hubei-MOST KLOS & KLOBM, School & Hospital of Stomatology, Wuhan University, Wuhan, China,Department of Orthodontics, School & Hospital of Stomatology, Wuhan University, Wuhan, China,Center for Dentofacial Development and Sleep Medicine, School & Hospital of Stomatology, Wuhan University, Wuhan, China,Hong He
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Nogami Y, Saitoh I, Inada E, Murakami D, Iwase Y, Kubota N, Nakamura Y, Nakakura-Ohshima K, Suzuki A, Yamasaki Y, Hayasaki H, Kaihara Y. Lip-closing strength in children is enhanced by lip and facial muscle training. Clin Exp Dent Res 2021; 8:209-216. [PMID: 34499413 PMCID: PMC8874039 DOI: 10.1002/cre2.490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 08/18/2021] [Accepted: 08/23/2021] [Indexed: 11/11/2022] Open
Abstract
Objectives Weakening of lip‐closing strength (LCS) associated with an incompetent lip seal (ILS) may affect the oral balance between the lip and tongue pressures. The purpose of this study was to evaluate the effects of lip‐closing training in children with lower LCS and/or abnormal habits across different age groups and to compare its effects on increasing LCS in children with malocclusion and/or oral habits. Material and Methods Lip‐closing training was performed by 154 Japanese children aged 3–12 years using a specialized training device at home for 3 months. Children with oral habits and/or exhibiting less than standard LCS were included. LCS was measured using a digital strain force gauge at a dental clinic at the beginning (T0) and after each month (after 3 months: T3). Results Children had higher LCS responses after lip‐closing training. The first month of lip‐closing training was more effective than the subsequent months. With lip‐closing training, the LCS increased from an average of 6.2 N (T0) to 11.4 N (T3) in Group I, 7.9 N (T0) to 12.8 N (T3) in Group II, and 6.8 N to 11.4 N in Group III. Anterior cross bite, including reverse bite, open bite, and tongue thrusting, significantly reduced training effects. Conclusion Our findings showed that lower LCS in children with ILS resulted in greater responses to lip‐closing training in a short period, but oral dysfunction, such as abnormal habits, inhibited the positive effects of training. Our results suggest that less detrimental effects of malocclusion and abnormal oral habits lip‐closing training enhances LCS in younger children.
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Affiliation(s)
- Yukiko Nogami
- Division of Pediatric Dentistry, Graduate School of Medical and Dental Science, Niigata University, Niigata, Japan
| | - Issei Saitoh
- Department of Pediatric Dentistry, Asahi University School of Dentistry, Mizuho, Japan
| | - Emi Inada
- Department of Pediatric Dentistry, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Daisuke Murakami
- Department of Pediatric Dentistry, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Yoko Iwase
- Department of Dentistry for the Disability and Oral Health, Asahi University School of Dentistry, Gifu, Japan
| | - Naoko Kubota
- Department of Pediatric Dentistry, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Yuki Nakamura
- Division of Pediatric Dentistry, Graduate School of Medical and Dental Science, Niigata University, Niigata, Japan
| | - Kuniko Nakakura-Ohshima
- Division of Pediatric Dentistry, Graduate School of Medical and Dental Science, Niigata University, Niigata, Japan
| | - Ayako Suzuki
- Division of Pediatric Dentistry, Graduate School of Medical and Dental Science, Niigata University, Niigata, Japan
| | - Youichi Yamasaki
- Department of Pediatric Dentistry, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Haruaki Hayasaki
- Division of Pediatric Dentistry, Graduate School of Medical and Dental Science, Niigata University, Niigata, Japan
| | - Yasutaka Kaihara
- Department of Dental Hygiene, Ogaki Women's College, Ogaki, Japan
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