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34 resources
Learners & clinicians · Foundations & reference
An archwire doesn't move a tooth directly — it moves the periodontal ligament, and the ligament tells the bone what to do. This chapter follows that chain: from the fibrous tissue holding a tooth in its socket, to the pressure and tension it feels under load, to the cells and molecular signal that turn "squeezed" into "resorbed" and "stretched" into "built."
Learners & clinicians · Foundations & reference
Force systems, centers of resistance, anchorage, wire mechanics, and loop mechanics.
Learners & clinicians · Applied mechanics
Retract the anterior segment without allowing the posterior unit to tip mesially.
Learners & clinicians · Applied mechanics
Use differential end moments for space closure while controlling the vertical response at both teeth.
Learners & clinicians · Applied mechanics
Intrude the occlusally displaced mandibular right canine 43 while identifying the initial force, moment, and reciprocal response on each connected tooth.
Learners & clinicians · Applied mechanics
Move the crown first while keeping the initial tipping response controlled.
Learners & clinicians · Applied mechanics
Move crown and root together initially instead of accepting a crown-first response.
Learners & clinicians · Applied mechanics
Increase root control until the root leads the initial response.
Learners & clinicians · Applied mechanics
Reverse the direction of translation without losing the signed force-and-couple relationship.
Learners & clinicians · Applied mechanics
Close extraction spaces by retracting the anterior segment while preventing mesial molar migration and maintaining lower incisor inclination.
Learners & clinicians · Applied mechanics
Retract the maxillary anterior segment to reduce overjet (Class II camouflage / dentoalveolar protrusion) while maintaining upper incisor torque and preventing mesial migration of the maxillary molars.
Learners & clinicians · Applied mechanics
Coordinate maximum-anchorage retraction of both arches to reduce bimaxillary dentoalveolar protrusion and improve the lip profile, keeping upper/lower retraction balanced so the molar relationship stays Class I and the midlines coincident.
Learners & clinicians · Applied mechanics
Shift the upper anterior segment toward the deviated side to correct the dental midline, using differential left-vs-right anchorage and asymmetric force systems while avoiding a new posterior or molar asymmetry.
Learners & clinicians · Applied mechanics
Retract and retrocline the lower anterior segment (and often procline the uppers) to correct the incisor relationship and camouflage a mild-to-moderate skeletal Class III, staying inside the lower-incisor inclination limit set by the labial alveolar bone.
Learners & clinicians · Applied mechanics
Relieve lower crowding / retract the lower labial segment using lower-only premolar extraction, while planning the lower anchorage so the buccal occlusion finishes in an agreed relationship despite the unmatched upper arch.
Learners & clinicians · Applied mechanics
Close the second-premolar extraction spaces mainly by mesial movement (protraction) of the posterior segments, preserving incisor position in a minimum/moderate-anchorage case where little anterior retraction is wanted.
Learners & clinicians · Applied mechanics
Close the edentulous molar space by protracting the posterior teeth forward into the site while a contralateral compensating extraction balances the arch, keeping the midline centred and the occlusal plane level despite the built-in left-right asymmetry.
Clinicians & researchers · Applied mechanics
Compare posterior drift before choosing whether added teeth or skeletal anchorage are needed.
Clinicians & researchers · Applied mechanics
Choose activation and inspect the molar counter-moment, reciprocal force, and tube-friction effect.
Clinicians & researchers · Applied mechanics
Compare loop height, position, wire, and gable bends at both teeth before engagement.
Clinicians & researchers · Applied mechanics
Build the force and counter-couple, then inspect the intended response and reciprocal load in 3D.
Clinicians & researchers · Applied mechanics
See whether the wire is active and which tooth receives each force and couple.
Clinicians & researchers · Applied mechanics
Level one displaced tooth and reveal the reciprocal extrusion and moments inherited by its neighbors.
Clinicians & researchers · Applied mechanics
Estimate how much prescribed force reaches the tooth after friction and binding.
Clinicians & researchers · Applied mechanics
Displace a tooth, engage a wire, and inspect the initial load delivered across the arch.
Clinicians & researchers · Applied mechanics
Compose wires, elastics, and skeletal anchorage, then attribute the superposed response tooth by tooth.
Learners & clinicians · Professional study
M/F Ratio & Force Systems questions for study and self-testing. Coverage is selective; sources are shown with the answers.
Learners & clinicians · Professional study
Force Systems questions for study and self-testing. Coverage is selective; sources are shown with the answers.
Learners & clinicians · Professional study
Center of Resistance & Rotation questions for study and self-testing. Coverage is selective; sources are shown with the answers.
Learners & clinicians · Professional study
Anchorage questions for study and self-testing. Coverage is selective; sources are shown with the answers.
Learners & clinicians · Professional study
Wire Mechanics questions for study and self-testing. Coverage is selective; sources are shown with the answers.
Learners & clinicians · Professional study
Loop Mechanics questions for study and self-testing. Coverage is selective; sources are shown with the answers.
Clinicians & researchers · Foundations & reference
Pin two simulator states and compare their parameters, outputs, and signed differences.
Learners & clinicians · Foundations & reference
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