Correction of Deep Overbite by Using a Modified Nance Appliance in an Adult Class II Division 2 Patient with Dehiscence Defect

Table 1

Skeletal and dental changes indicated by the cephalometric measurements.

Variables	Norm		Pretreatment	Posttreatment	Difference
	Mean	SD
Angular (°)
SNA	82.3	3.5	84.2	81.7	−2.5
SNB	77.6	2.9	79	79.2	0.2
ANB	4.7	1.4	5.2	2.5	−2.7
U1-SN	104.8	5.3	76.8	102.4	25.6
U1/L1	122	6	172.7	141	−31.7
FMA	31.8	4.4	23.7	25.9	2.2
L1/MP	94.7	5.2	79.7	89.5	9.8
Linear (mm)
Wits appraisal	−1.4	2.6	−1.4	−2.7	−1.3
N-ANS	49	2.2	51.9	51.9	0
ANS-Me	60.8	4.9	55.5	56.9	1.4
L1-Apo	3.9	1.5	−4	0.2	−3.8
Low lip to E-line	3	1.8	−4.7	−4	0.7
Face height ratio (%)	55.4	1.3	51.7	52.3	1.6