Uno, Dos, Tres/ All the Screws in the Same Place Jay Bowman
Jay’s preferred location
· Palate: 2nd premolar – 1st molar
o Largest inter-radicular site
o U5 root labial in position
o Direct insertion, no contra-angle
o Lowest failure rate
o ‘T’ shape of palate for insertion Ludwig & Bowman 2011
Distalisation
· Modified distal jet Moyer’s symposium 2008
o TAD – u5-u6 position
o Horseshoe shaped metal wire – ligate to TADs
o Activation – opencoil located between anterior horseshow and molar
§ Distal vector on 6 only
§ Transeptal fibres will retract the premolars
o After distalisation convert to anchorage
§ Locking screws maintains position of 6s whilst retract anterior teeth
Protraction of posterior teeth
· TPA modifications
o TPA+
§ TADs in the U5-U6 region
§ TPA bar positioned behind the TADs
§ Powerchain to protract the 6s anteriorly
Class 3 AOB – TPA +
· Hybrid hyrax – TADs and RME
· TADs – U5-U6
· TPA 3mm from the palate
· Powerchain from TPA to TADs
Protraction of molars and intrusion of molars
Class 2 AOB – TPA –
· TADs – U5-U6
· Ligate anterior TPA to TADs (TADs distal to TPA)
o Distalisation and intrusion
Absolute anchorage – extraction case TPA –
· Extraction of 4s
· TADs U6-U5
· TPA ligated to TADs, TADs distal to TPA with powerchain
Class 3 – protraction and intrusion – TPA+
· TPA_+ with mesial hook on molar
o TPA + for protraction, TADs anterior to TPA
o Hooks on molars with powerchain = intrusion
§ ‘L shape chain’ protraction and vertical powerchain
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References
Seminar in orthodontics Moskowitz 2018
