Biomaterial Database

[Relationship of the terminal position of the muscular contraction path and centric relation position in different vertical dimension]. 2010

Jian-zhang Liu, and Jun Xu

Depatment of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China.

OBJECTIVE To investigate the relationship of the terminal position of the muscular contraction path and centric relation position with different vertical dimension. METHODS The terminal position of the muscular contraction path and centric relation position with different vertical dimension were recorded for ten edentulous patients with gothic arch. RESULTS The mesial distance between the terminal position of the muscular contraction path and centric relation position increased with the vertical dimension. The lateral dimension between the terminal position of the muscular contraction path and centric relation position, the distribution of the terminal position of the muscular contraction path are not correlated to the vertical dimension. The center of the terminal position of the muscular contraction path is 1-4 mm ahead of the centric relation position and (0.42 + or - 0.47) mm lateral to the centric relation position. The distribution of the terminal position of the muscular contraction path is (1.36 + or - 0.58) mm in the mesial-distal direction, (1.56 + or - 0.62) mm in the lateral direction. CONCLUSIONS With the increase of the vertical dimension, the mesial distance between the terminal position of the muscular contraction path and centric relation position increased.

UI	MeSH Term	Description	Entries
D008410	Masticatory Muscles	Muscles arising in the zygomatic arch that close the jaw. Their nerve supply is masseteric from the mandibular division of the trigeminal nerve. (From Stedman, 25th ed)	Masticatory Muscle,Muscle, Masticatory,Muscles, Masticatory
D009066	Mouth, Edentulous	Total lack of teeth through disease or extraction.	Mouth, Toothless,Edentulous Mouth,Edentulous Mouths,Toothless Mouth
D009119	Muscle Contraction	A process leading to shortening and/or development of tension in muscle tissue. Muscle contraction occurs by a sliding filament mechanism whereby actin filaments slide inward among the myosin filaments.	Inotropism,Muscular Contraction,Contraction, Muscle,Contraction, Muscular,Contractions, Muscle,Contractions, Muscular,Inotropisms,Muscle Contractions,Muscular Contractions
D003768	Dental Occlusion, Centric	Contact between opposing teeth during a person's habitual bite.	Centric Dental Occlusion,Occlusion, Centric Dental
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D014716	Vertical Dimension	The length of the face determined by the distance of separation of jaws. Occlusal vertical dimension (OVD or VDO) or contact vertical dimension is the lower face height with the teeth in centric occlusion. Rest vertical dimension (VDR) is the lower face height measured from a chin point to a point just below the nose, with the mandible in rest position. (From Jablonski, Dictionary of Dentistry, 1992, p250)	Mandibular Rest Position,Rest Vertical Dimension,Vertical Dimension at Rest,Vertical Dimension of Occlusion,Dimension, Rest Vertical,Dimension, Vertical,Dimensions, Rest Vertical,Dimensions, Vertical,Mandibular Rest Positions,Occlusion Vertical Dimension,Occlusion Vertical Dimensions,Position, Mandibular Rest,Positions, Mandibular Rest,Rest Position, Mandibular,Rest Positions, Mandibular,Rest Vertical Dimensions,Vertical Dimension, Rest,Vertical Dimensions,Vertical Dimensions, Rest
D016302	Centric Relation	The location of the maxillary and the mandibular condyles when they are in their most posterior and superior positions in their fossae of the temporomandibular joint.	Dental Centric Relation,Centric Relation, Dental,Relation, Centric,Relation, Dental Centric