Clear Aligner Technique by Sandra Tai

Author:Sandra Tai
Language: eng
Format: epub, pdf
Publisher: International Quintessence Publishing Group
Published: 2018-10-15T00:00:00+00:00

Fig 10-2 Case of Class I dental malocclusion with underlying Class II skeletal discrepancy. (a to h) Pretreatment records. Note the retrognathic mandible. (i) Cephalometric analysis indicating a skeletal Class II malocclusion (ANB of +6 degrees).

The remainder of this chapter discusses nonextraction options for Class II treatment ( Table 10-1 ).

TABLE 10-1 Indications for Class II treatment

CLASS II SIMULATION JUMP SEQUENTIAL DISTALIZATION MANDIBULAR ADVANCEMENT EXTRACTIONS (DENTAL CAMOUFLAGE) ORTHOGNATHIC SURGERY

Age Growing teens, nongrowing adults Any age Growing teens and younger Preferably nongrowing patients Nongrowing patients

Dental classification Up to a full cusp (2 to <4 mm) for teens, half cusp or less for adults Half cusp or more (2 to <4 mm) for teens, half cusp (2 mm) or less for adults Up to a full cusp (2 to <4 mm) for teens or younger Full cusp Class II or where protrusion and crowding indicate extractions Full cusp Class II where extractions for dental camouflage are not indicated

Skeletal pattern Skeletal Class I or Class II tendency, but dental Class II ANB +4 to +5 degrees, skeletal Class II tendency ANB +4 degrees or more ANB +4 to +6 degrees ANB +8 to +10 degrees

Soft tissue facial profile Orthognathic Mildly convex Orthognathic Mildly convex Convex profile with mandibular retrognathia requiring facial change Mildly convex profile where lip posture can tolerate extractions Severely convex/retrognathic profile requiring facial change

INNOVATIONS FOR ANTEROPOSTERIOR CORRECTION

The innovations for Class II anteroposterior (AP) correction are precision cuts, power ridges, and optimized root control attachments ( Fig 10-3 ).

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