The superimposition of pre- and post-treatment lateral cephalometric radiographs showed retroclination
of the upper and lower incisors and mesialization of the upper and lower molars (Figure 5).
Dentofacial parameters explaining variability in retroclination
of the maxillary central incisors.
Pre-debonding panoramic radiograph (Fig 5) shows parallelism of teeth roots around the extractions sites, while cephalometric radiograph (Fig 6) shows improvement of the patient's profile mainly through retroclination
of upper and lower incisors.
The lower lip line is slightly resting higher than normal which resulted in the retroclination
of the upper central incisors.
This strongly indicates that the change in the above dimensions in the mandibular arch is due to retroclination
of mandibular incisors rather than true deficiency in the arch itself.
The only drawback of this treatment plan was the addi- tional retroclination
of the mandibular incisors and for the stability of the dental expansion, long term reten- tion is important to maintain the result.
Class II, division 2 group: Decreased anterior facial height; excessive overbite (more than three mm); retroclination
of two or more maxillary incisors; Angle Class II molar relationship in centric occlusion.