Leveling the curve of Spee with a continuous archwire technique: A long term cephalometric study

Relapse of orthodontically corrected deepbites in accordance with growth pattern

“…This can be considered relative intrusion since the incisors were held in pre-treatment positions and growth maintained the mandibular plane angle. This was similar to the findings by Bernstein, Preston & Lampasso (2007), who also observed that most levelling of the Curve of Spee in their sample was accomplished by the extrusion of the premolars, although they noted some incisor intrusion as well. Conversely, Otto, Anholm & Engel (1980) found that the majority of deep-bite cases treated using the Bioprogressive technique were corrected by a combination of lower incisor intrusion and incisor proclination.…”

“…Bernstein, Preston & Lampasso (2007) observed that most levelling of the Curve of Spee in their sample was accomplished by the extrusion of the premolars, although some incisor intrusion was observed as well. Finally, Otto, Anholm & Engel (1980) analysed deep-bite cases treated using Bioprogressive technique and reported that the majority were corrected by a combination of lower incisor intrusion and incisor proclination.…”

A comparative study of different intrusion methods and their effect on maxillary incisors

“…It was observed that overjet correction and change in U1-PP in Group III was significantly lower as compared to that in Groups I and II (p < 0.05). It can be presumed that in group III (RCS) no overjet correction has been done and the leveling of the COS takes place more by premolar extrusion than incisor intrusion 11 whereas with group I and II, retraction was simultaneously occurring due to tight cinch back. It was observed that Group I (utility arch) had significantly higher mean root resorption of 1.56 mm as compared to Groups II (K-SIR) of 1.08 mm and group III (RCS) of 0.96 mm.…”

Assessment of Long-Term Stability ofLeveling of theCurve of Spee after Orthodontic Treatment in Mesocephalic Patients -A Pilot Study

“…A flat curve is proposed as a way of overcorrection in orthodontic treatment since there is a natural tendency of deepening the curve over time, which can lead to an undesirable increase in overbite and posterior occlusal interferences [8,10]. Alterations due to orthodontic treatment may have undesirable recurrences after device removal, often almost returning to its original features [11].…”

“…The presence of an exaggerated curve of Spee is common in malocclusions with deep bite, which can change muscle balance and, finally establish an improper function of the occlusion [7][8][9].…”