Finite-element analysis of the shift in center of resistance of the maxillary dentition in relation to alveolar bone loss

Abstract

5-10한편 최근 교정영역에서 미니 임플란트와 miniplate 등과 같은 골내 고정원 장치(temporary skeletal

Analysis of lingual en masse retraction combining a C-lingual retractor and a palatal plate

“…15,17,26 The biocreative therapy concept has been applied with labial appliances and, in this study, with lingual appliances. Analysis of the center of resistance is the key to designing successful retraction biomechanics.…”

“…[1][2][3] Segmental orthodontics can be a good choice for this, 4,5 and biocreative therapy for anterior retraction offers a further advantage since fixed posterior appliances are not necessary. [6][7][8][9][10][11][12][13][14][15] Orthodontists often choose to remove premolars to retract crowded or protrusive anterior teeth. Location and management of the center of resistance with respect to retraction force vectors (Cres) is critical.…”

Torque control during lingual anterior retraction without posterior appliances

“…Biocreative therapy with the C-retractor eliminates these side effects, because the anterior segment is bonded as a unit with a rigidly constructed device. Furthermore, retraction control is in the hands of the clinician, since controlled bodily displacement, tipping, and root retraction is possible through altering the vertical height of the LARH 24,25…”

Atypical orthodontic extraction pattern managed by differential en-masse retraction against a temporary skeletal anchorage device in the treatment of bimaxillary protrusion

“…These challenges include the shifting of midlines during active orthodontic tooth movement and occlusal canting resulting from different centers of resistance of each retracted tooth unit, a 3-tooth unit (central incisor, lateral incisor, and canine) vs a 4-tooth unit (3 teeth and first premolar). [16][17][18] These challenges, however, can easily be overcome by using different strengths of rubber bands on each side and by defining different points of action where the line of force is drawn; these result in differential en-masse retraction of the anterior teeth.…”