1
|
Ishii M, Kato K, Ichimura K, Sakai T. The three layered structure of orbicularis oris and buccinator complex with partial connection at the modiolus and partial direct continuation. Surg Radiol Anat 2024; 46:649-657. [PMID: 38573505 DOI: 10.1007/s00276-024-03354-5] [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: 12/18/2023] [Accepted: 03/21/2024] [Indexed: 04/05/2024]
Abstract
PURPOSE This study aimed to clarify the structural arrangement of the orbicularis oris (OOr), the buccinator, and the other perioral muscles around the modiolus. METHODS The perioral muscles in seventeen cadavers fixed with formalin were dissected in situ and/or in isolated muscle specimens, and their layers were reconstructed schematically upon pantomographic view of the skeleton to evaluate their actions. RESULTS The buccinator was composed of three parts including upper and lower oblique parts in its superficial layer and a middle transverse part in its deep layer. The superior and inferior OOr were composed of an inner marginal part (IM) and an outer labial part (OL) in each. The perioral muscles as a whole were arranged in three layers. The first layer consisted of the depressor anguli oris and the OL of superior OOr connected at the modiolus in a vertical direction. The second layer consisted of the upper and inner oblique part of buccinator and a part of the OL of inferior OOr connected at the modiolus in a horizontal direction. The third layer contained the middle transverse part of buccinator continuous with the IM of both OOr and a part of the OL of inferior OOr without connection to the modiolus. CONCLUSIONS The different arrangement of the three layers of perioral muscles around the modiolus could serve as a good basis to predict the actions of the individual perioral muscles on the movement of lips in open/close of the oral fissure and widening/narrowing of the lip width.
Collapse
Affiliation(s)
- Masuko Ishii
- Department of Anatomy and Life Structure, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo- ku, Tokyo, 113-8421, Japan
- Forensic Science Laboratory, Chiba Prefecture Police Headquarters, Chiba, Japan
| | - Kota Kato
- Department of Anatomy and Life Structure, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo- ku, Tokyo, 113-8421, Japan
| | - Koichiro Ichimura
- Department of Anatomy and Life Structure, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo- ku, Tokyo, 113-8421, Japan
| | - Tatsuo Sakai
- Department of Anatomy and Life Structure, Juntendo University Graduate School of Medicine, 2-1-1 Hongo, Bunkyo- ku, Tokyo, 113-8421, Japan.
- Department of Physical Therapy, Faculty of Health Science, Juntendo University, Tokyo, Japan.
| |
Collapse
|
2
|
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.
Collapse
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
| |
Collapse
|
3
|
Minoura A, Ihara Y, Kato H, Murakami K, Watanabe Y, Hirano K, Ito Y, Kokaze A. Relationships between Lip Seal Strength, Tongue Pressure, and Daytime Sleepiness in Japanese Workers: A Cross-Sectional Study. Clin Pract 2023; 13:753-762. [PMID: 37489417 PMCID: PMC10366721 DOI: 10.3390/clinpract13040068] [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: 05/24/2023] [Revised: 06/21/2023] [Accepted: 06/30/2023] [Indexed: 07/26/2023] Open
Abstract
This cross-sectional study aimed to examine the relationships between lip seal strength, tongue pressure, and daytime sleepiness in Japanese workers. A self-administered questionnaire which comprised the Epworth Sleepiness Scale (ESS) was completed by 496 workers, and excessive daytime sleepiness was defined by an ESS score of 11 or over. Lip seal strength and tongue pressure were measured in all participants, and multiple regression analyses were performed to examine the effects of lip seal strength and tongue pressure on daytime sleepiness. The median ESS score was 5.0 (25th and 75th percentiles: 2.0 and 8.0), and 42 (8.5%) workers had excessive daytime sleepiness. The median lip seal strength was 13.5 N (11.4, 16.3), and the tongue pressure was 41.7 kPa (35.2, 48.3). Workers with higher ESS scores had significantly lower levels of lip seal strength than those without, following adjustments for age and body mass index (BMI) values (β (95% confidence interval): -0.043 [-0.081, -0.004]). However, tongue pressure was not significantly associated with ESS score after adjustments for age and/or BMI. These results suggest that maintaining moderate lip seal strength may help prevent excessive daytime sleepiness in Japanese workers regardless of age or BMI.
Collapse
Affiliation(s)
- Akira Minoura
- Department of Hygiene, Public Health and Preventive Medicine, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Yoshiaki Ihara
- Division of Oral Functional Rehabilitation Medicine, Department of Special Needs Dentistry, School of Dentistry, Showa University, 2-1-1 Kitasenzoku, Ohta-ku, Tokyo 145-8515, Japan
| | - Hirotaka Kato
- Division of Oral Functional Rehabilitation Medicine, Department of Special Needs Dentistry, School of Dentistry, Showa University, 2-1-1 Kitasenzoku, Ohta-ku, Tokyo 145-8515, Japan
| | - Kouzou Murakami
- Department of Radiology, Division of Radiation Oncology, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Yoshio Watanabe
- Division of Respiratory Medicine and Allergology, Department of Medicine, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Kojiro Hirano
- Department of Otorhinolaryngology Head and Neck Surgery, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Yoshinori Ito
- Department of Radiology, Division of Radiation Oncology, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| | - Akatsuki Kokaze
- Department of Hygiene, Public Health and Preventive Medicine, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
| |
Collapse
|
4
|
Martínez-Silva B, Diéguez-Pérez M. Review on Mandibular Muscle Kinematics. Sensors 2022; 22:s22155769. [PMID: 35957324 PMCID: PMC9371193 DOI: 10.3390/s22155769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Revised: 07/26/2022] [Accepted: 07/27/2022] [Indexed: 12/02/2022]
Abstract
The complexity of mandibular dynamics encourages constant research as a vehicle to improve oral health. The gold standard motion capture system might help us to understand its functioning and its relation to body position, aiming to perform an exhaustive bibliographic review in the Dentistry field. Six different electronic databases were used (Dentistry & Oral Sciences Source, Scopus, Web of Science, PubMed, CINAHL and SPORTDiscus) in April 2022. The selection criteria includes a biography, critical analysis, and the full text from 1984 to April 2022, based on the odontological gold standard, whether or not in combination with additional devices. Clinical cases, bibliographic reviews or meta-analysis and grey literature were excluded. The checklist of the critical assessment methodology by Joanna Brigs was used (JBI). After choosing scientific articles published in peer-reviewed journals, 23 out of 186 investigations were classified as eligible with a total of 384 participants. The issue being addressed is related to the speech properties, posture and body movement in relation to dento-oro-facial muscle and facial analysis, mandibular kinematics and mandibular dynamics during the mastication process. The markers arrangement depends on the dynamic to be analysed. From a physiologic and pathologic perspective, the applications of the optic system are relevant in Dentistry. The scarcity of literature obtained implies the need for future research.
Collapse
Affiliation(s)
- Beatriz Martínez-Silva
- Faculty of Biomedicine and Health Sciences, European University of Madrid, 28670 Villaviciosa de Odón, Spain;
| | - Montserrat Diéguez-Pérez
- Preclinical Dentistry Department, Faculty of Biomedicine and Health Sciences, European University of Madrid, C. Tajo s/n, 28670 Villaviciosa de Odón, Spain
- Correspondence:
| |
Collapse
|