Correlational study of impacted and non-functional lower third molar position with occurrence of pathologies

Progress in Orthodontics

Table 4 Evaluation of the prevalence of crowding presenting with orthodontic treatment (T1) and the initial Pell and Gregory classification (T0)

	Dental crowding
Variable	Present		Absent		Total		p value
	n	%	N	%	n	%
• Orthodontic treatment—T1
In implementation	–	–	6	100.0	6	100.0	p ^a = 0.039*
Completed without lingual retainer	5	55.6	4	44.4	9	100.0
Completed with contention	1	12.5	7	87.5	8	100.0
Not completed	1	50.0	1	50.0	2	100.0
Not taken	1	100.0	–	–	1	100.0
• Pell and Gregory—T0
IIB	3	21.4	11	78.6	14	100.0	p ^a = 0.039*
IIIB	4	66.7	2	33.3	6	100.0
IC	–	–	6	100.0	6	100.0
IIC	7	50.0	7	50.0	14	100.0

Obs.: Relative risk was not determined due to the occurrence of zero or very low frequencies
n Number of teeth
*Significant difference at 5 %
^aFisher’s exact test