Morphological Characteristics of Vertical Sections of the Mandible Obtained by CT Scanning.

Kasai, Kazuhiko; Enomoto, Yutaka; Ogawa, Tomoya; Kawasaki, Yoshimitsu; Kanazawa, Eisaku; Iwasawa, T

doi:10.1537/ase.104.187

Cited by 7 publications

(9 citation statements)

References 20 publications

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“…However, when considering the relationship between gonial angle and the height of each section, gonial angle was positively related to symphysis height, but negatively related to height in the second molar region. The results of the present study agreed with those of Kasai et al [9] It was suggested that the height of the M2 section was less than that of the L1 section, while the width of the M2 section was greater than that of the L 1 section. The M2 section was rounder in shape than the L 1 section.…”

Section: Discussionsupporting

confidence: 93%

“…Kasai et al [9] found that gonial angle was associated with buccal and lingual cortical bone thickness in the second molar section. Furthermore, gonial angle was related to the heights of both the symphysis and second molar sections.…”

Section: Discussionmentioning

confidence: 99%

“…Kasai et al [9] studied the relationship between internal structures of the mandibular body and gonial angle. They reported that there was a relationship between gonial angle and the size of the mandibular body in the region of the second molar, and also that masticatory function influenced both mandibular structure and the size of the mandibular body.…”

Section: Introductionmentioning

confidence: 99%

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Relationship between maxillofacial morphology and morphological characteristics of vertical sections of the mandible obtained by CT scanning.

Kohakura

Kasai

Ohno

et al. 1997

The Journal of Nihon University School of Dentistry

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: A study was conducted to evaluate the relationships between morphological characteristics of vertical sections of the mandibular body and dentopfacial morphology. Cortical bone thickness, tooth inclination and bone inclination of the mandible were investigated. Among skeletal components, ANSMe distance was associated with the buccal cortical bone thickness of the P2 (second premolar) section. Gonial angle, SN to mandibular angle, and palatal to mandibular angle were negatively correlated with the buccal cortical bone thickness of P2 and MI (first molar) sections. SNA and SNB which indicated the protrusion of the upper and lower jaws were positively correlated with the buccal cortical bone thickness of the Ml section. Among denture components, lower and upper incisor positions showed a significant negative correlation with the buccal cortical bone thickness of the P2 section. The interincisal angle was associated with the basal cortical bone thickness of the M2 (second molar) section. In summary, there were significant and complex relationships between the structures of the mandibular body and maxillofacial morphology. Facial types which relate to masticatory function are associated with the cortical bone thickness of the mandibular body.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Relationship between maxillofacial morphology and morphological characteristics of vertical sections of the mandible obtained by CT scanning.

Kohakura

Kasai

Ohno

et al. 1997

The Journal of Nihon University School of Dentistry

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“…The main elevator muscles of the mandible—the masseters and the medial pterygoids—act together as a sling around the angle of the jaw to lift the mandible and to close the space between the upper and lower jaws (Potgieter et al, ). A greater muscular force would result in a more acute angulation of the mandibular angle, while the angulation in response to a lesser force and thus reduced functionality would be more obtuse (Kasai et al, ; Keen, ; Ohm and Silness, ).…”

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confidence: 99%

“…The notion that unbalanced loss of molars has a negative effect on the function of mastication and associated acuteness of the mandibular angle, rendering it more obtuse (Oettlé et al, ), was implemented along with other guidelines from the literature to construct criteria to define dentition groups which might better represent biomechanical forces on the mandible. Apart from the number and position of the remaining teeth, occlusions of the mandibular teeth with the corresponding maxillary teeth were also considered to define groups with progressive tooth loss (Ceylan et al, ; Kasai et al, ; Kohakura et al, ; Oettlé et al, ; Pileicikiene and Surna, ; Yanıkoğlu and Yılmaz, ).…”

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confidence: 99%

Changes in the mandibular angle during adulthood in South Africans

Oettlé

Ehlers

Steyn

2016

American J Hum Biol

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Objectives: The purpose of this study was to measure the mandibular angle as a reflection of the biomechanical forces acting on the mandible and relate it to aging and loss of teeth.Methods: A total of 717 mandibles of adult individuals were selected from the Pretoria Bone Collection. These mandibles were allocated to dentition subgroups according to their pattern of tooth loss. The angle of the mandible was measured with a mandibulometer. The variation in the mandibular angle was statistically analyzed by age regressions and comparisons between adjusted means of dentition subgroups.Results: Aging per se was not associated with a greater mandibular angle. With limited tooth loss, aging was associated with a smaller mandibular angle in females.Generally the mandibular angle increased with tooth loss and was accentuated when an even occlusion pattern was lost rather than with more extensive tooth loss. A more pronounced increase in mandibular angle with tooth loss was noted in females and individuals of European ancestry. Conclusions:Tooth loss and not aging is associated with an increase in the mandibular angle. Masculinity and being from African ancestry provided some protection against an increase in the mandibular angle with tooth loss. The accentuated increase in the mandibular angle when an even occlusion pattern was disturbed supports the notion that an uneven loss of teeth was indeed associated with inefficient mastication. The unexpected decrease in angle noted in females with aging but limited tooth loss may be indicative of constructive changes beyond puberty.

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Variability associated with mandibular buccal shelf area width and height in subjects with different growth pattern, sex, and growth status

Gandhi

Upadhyay

Tadinada

et al. 2021

American Journal of Orthodontics and Dentofacial Orthopedics

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Morphological Characteristics of Vertical Sections of the Mandible Obtained by CT Scanning.

Cited by 7 publications

References 20 publications

Relationship between maxillofacial morphology and morphological characteristics of vertical sections of the mandible obtained by CT scanning.

Relationship between maxillofacial morphology and morphological characteristics of vertical sections of the mandible obtained by CT scanning.

Changes in the mandibular angle during adulthood in South Africans

Variability associated with mandibular buccal shelf area width and height in subjects with different growth pattern, sex, and growth status

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