Abstract
Aims: The aim of this study is to assess Köle analysis
(Tuinzing modification) for determining the possible positions
of chin (soft and hard tissue) in skeletal Cl.I, Cl.II and Cl. III
type of malocclusion of adult age group and for both genders.
Materials and Methods: The study was carried out on the
lateral cephalometric radiograph of (118) subjects of adult age
group (18-25) years old; Cl I type (28 male and 19 female), Cl
II type (19 male and 17 female) and Cl III type (18 male and
female 17). SNA, SNB and ANB were used to estimate the
type of skeletal malocclusion. For the analysis, 2 lines
perpendicular to SN line are drawn touching the most anterior
point of the upper lip-Ls (upper lip plane) and one from the
infra orbital point-Or (orbital plane). The position of the chin
points (hard and soft tissue) were assessed via determining the
position of (Pog and Pg) respectively in relation to these two
vertical planes using five scores: Score 1: give to the chin
point that situated posterior to orbital plane. Score 2: give to
the chin point that situated in a touch with orbital plane. Score
3: give to the chin point that situated in between orbital plane
and upper lip plane. Score 4: give to the chin point that
situated in a touch with upper lip plane. Score 5: give to the
chin point that situated anterior to the upper lip plane.
Results: The positions of Pog and Pg: Cl I mainly at score (2
and 3) respectively, Cl II mainly at score (1and 2) respectively
and Cl III type Pog gave rise to slight increase of score (3 than
2) while Pg gave rise to slight increase of score (3 than 5) with
no significant difference between genders for all classes.
Conclusions: Köle analysis (Tuinzing modification) may be
valuable for determining chin (soft and hard tissues) of Cl I,
Cl II and Cl III types of malocclusion of adult age group and
for both genders.
