During anterior movement of the second premolars and molars, the greater mesial movement of the distal cusps, as compared to the mesial cusps, noted with the lingual archwire can be attributed to greater amount of clockwise rotation of the crowns under the retraction forces applied to the lingual side.
In addition, evidence that most populations are inside the historical refugium suggests that even under demographic retraction or spatial displacements, a wide climatically stable area available throughout the last glacial cycle favoured population persistence and genetic connectivity across Central Brazil, hence the high genetic diversity and polymorphism observed in modern populations.
Corollary 11.7, to be preserved under a radial retraction.
The first generalisation concerns the preservation of some fixed point properties under a radial retraction.
Defect structures after scratching and retraction under the scratching depths D1 and D2, respectively.
(e,f,g,h) Surface morphologies after scratching and retraction under the scratching depths D1 and D2, respectively.
Figure 3 Defect structures and surface morphologies after scratching and retraction under D1 and D2 (a,b,c,d).
In general, under en masse retraction forces, bodily displacement and tipping, together with vertical and transversal changes, are considered to occur throughout the dentition.
Structural failure of the partial rotator cuff repair was diagnosed when the rotator cuff could not be visualized because of complete retraction under the acromion or when there was a distinct, enlarged focal defect in the rotator cuff with displacement from the surgical insertion.
In this study, under en masse retraction forces, adverse transversal and vertical bowing effects were seen in the entire dentition - lingual tipping and extrusion of the anterior dentition occurred with both archwires, although more incisor tipping was evident with the lingual setup.
