Premium
Patterns and forces of occlusal contacts during lateral excursions recorded by the T‐Scan II system in young Chinese adults with normal occlusions
Author(s) -
WANG Y.L.,
CHENG J.,
CHEN Y.M.,
YIP K. H.K.,
SMALES R. J.,
YIN X.M.
Publication year - 2011
Publication title -
journal of oral rehabilitation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 93
eISSN - 1365-2842
pISSN - 0305-182X
DOI - 10.1111/j.1365-2842.2010.02194.x
Subject(s) - dentition , dentistry , medicine , orthodontics , mandibular canine , dental occlusion , position (finance) , lateral incisor , bite force quotient , occlusion , maxillary central incisor , surgery , finance , economics
Summary The objective was to characterise the patterns and forces of occlusal contacts during lateral mandibular excursions in a young Chinese adult population. Angle Class I normal occlusions in 85 dental students aged 20–29 were evaluated using the T‐Scan II occlusal imaging and analysis system. The frequency of occlusal contacts was recorded for right and left lateral excursions at the position of lateral disclusion, at the canine‐to‐canine position and at the lateral maximal position. At the canine‐to‐canine position, the occlusal contact patterns were classified, and the relative forces were compared by multiple regression analysis, with α = 0·05. At the position of lateral disclusion, a high percentage of canine contacts (58·5%) and individual posterior tooth contacts on the working side was observed. At the canine‐to‐canine position, the canines on the working side contacted most frequently (68·9%), and the occlusal contact patterns could be classified into six groups. At the lateral maximal position, incisors (39·0%) and canines (32·3%) contacted most frequently. At the canine‐to‐canine position, subjects with occlusal contacts only on canines or on first premolars on the working side had the lowest relative occlusal forces ( P < 0·001). Canine protection and group function do not identify all descriptors for lateral occlusal contact patterns in the natural dentition. Six occlusal contact patterns were found at the lateral canine‐to‐canine position.