Comparison of canine and premolar root lengths between group function and canine guided occlusions
Date
2016
Authors
Moshaoa, Lerato
Journal Title
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Abstract
Background: During orthodontic treatment, the maxillary canines are commonly
extruded to give a patient canine disocclusion, without the clinician having previously
checked as to whether the presenting function was canine guided occlusion or group
function occlusion. There is a general belief that the roots of canines are longer than
premolars and therefore are able to better withstand occlusal forces than the other
teeth. Aim: The aim of this research was to compare the root lengths of the canines
and premolars between and within subjects with canine guidance (CG) and group
function (GF). Methods: Root lengths of canines and premolars were measured on
periapical radiographs and compared between and within subjects with CG and GF.
Results: The canine roots were generally longer than those of the premolars in both
groups. However, this difference was much greater in the CG group compared with
GF. Premolar roots in GF were significantly longer than in CG. Conclusion: Canine
and premolar root lengths are fairly similar in GF but not in CG, where the canine
roots are much longer than premolars. The roots of premolars in GF occlusion are
longer than those in CG occlusion. There is no difference in root lengths of the
canines between CG and GF occlusions.
Description
A research report submitted to the Postgraduate committee
in partial fulfilment of the requirements for the
degree of
Master of Dentistry
in the branch of
Orthodontics
Parktown, Johannesburg, South Africa
2016