Jane's 5 point orthodontics articles

Question 1

Blazejewski SW. Thermoplastic Inclined Plane Aligner for Correction of Bilateral Mandibular Canine Tooth Distoclusion in a Cat. Journal of Veterinary Dentistry. 2013;30(4):236-247.

Answer 1

• Case report in a cat with MAL2 Initially extracted deciduous canines, then applied tooth extensions to permanent teeth, which failed
• Then took impressions and had thermoplastic incline planes (5 with serial gradations) fabricated which was a passive or intermittent force, removeable appliance. New appliance about every 10 days.
• To tip the canine teeth, a maximum 20° angle between the tooth axis and IP surface was desirable; minimizing the intrusive forces.
• Retainer recommended for recommended for 2 to 6-weeks for simple movements and 4 to 12-weeks for complex movements or about one half the time it takes to complete the movement.
• Complication encountered was bowing of mandibular incisors, which self corrected over time

Question 2

Volker MK, Luskin IR. Management of Mesioverted Maxillary Canine Teeth and Linguoverted Mandibular Canine Teeth. Journal of Veterinary Dentistry. 2016;33(3):170-184.

Answer 2

• Case report describing simultaneous tipping of mesioverted maxillary canine teeth and linguoverted mandibular canine teeth
• Used bilateral elastomeric chains and a small incline plane fashioned to attach only to the maxillary canine teeth, which would allow them to tip.
• Used composite buttons formed directly on the teeth, chain set at 75% of the neutral length, lost chain and buttons on one side
• For anchorage they applied the elastic chain with no tension between 09 and 08 – in future recommended to re-inforce with wire
• No retainer phase was used as the interlock of the canines was expected to be self retaining

Question 3

Verhaert L. A removable orthodontic device for the treatment of lingually displaced mandibular canine teeth in young dogs. Journal of veterinary dentistry. 1999;16(2):69-75.

Answer 3

• This is the Kong Ball paper – 38 test subjects
• Technique does not work with any major jaw length discrepancy ,and works best in young dogs with actively erupting teeth
• In less severe cases of mandibular retrognathia, it works if a very large ball is used and it can help tip the teeth rostrally and labially (if mandible is too short)
• They recommended 15 minutes of active chewing TID, movement typically taking 2-8 weeks time (older dogs up to 12)
• Approx ¾ dogs experienced correction, main factors preventing correction were skeletal malocclusions, such as narrow mandible or mandibular retrognathia

Question 4

Surgeon TW. Surgical exposure and orthodontic extrusion of an impacted canine tooth in a cat: A case report. Journal of Veterinary Dentistry. 2000;17(2):81-85.

Answer 4

• Case report of a 7 month old cat with facial swelling, unerupted maxillary canine tooth and a dentigerous cyst
• Opened and curetted the cyst, and left it to heal for 1 month to allow the tooth to erupt.
• It didn’t so orthodontically extruded the canine tooth with a custom invented anchorage device with extrusion force of 50-75g
• Managed to get the tooth extruded and it was still present and somewhat healthy at 5 years later.
• Had abnormal radicular anatomy