最近門診收治一例有趣的案例,就是出現在下顎前牙區底下的阻生犬齒,很多時候會誤以為它是transmigration(移行,移居),實際上transmigration其定義為transmigration as the phenomenon of an unerupted mandibular canine crossing the midline(要跨越中線才算),所以此案例應該以ectopically erupted right lower canine來定義,如果真要定義他屬於那一分類,則或許type 1可以來稱之,而transmigration在臨床上可分成5類(classification of transmigration)
Type 1: Canine positioned mesio-angularly across the
midline within the jaw bone, labial or lingual to anterior
teeth, and the crown portion of the tooth crossing the
midline
Type 2: Canine horizontally impacted near the inferior border
of the mandible below the apices of the incisors
Type 3: Canine erupting either mesial or distal to the opposite canine
Type 4: Canine horizontally impacted near the inferior border
of the mandible below the apices of either premolars or
molars on the opposite side.
Type 5: Canine positioned vertically in the midline (the long
axis of the tooth crossing the midline) irrespective of eruption status
在下顎的中門齒下方可以看到阻生萌發的右下犬齒,牙根的根尖閉合接近完成
這是文獻上提到的如何將阻生的犬齒牽引出來
從下顎骨的解剖位置,要將這顆犬齒拉到位,必需要特別注意下顎右下中門齒與側門齒必須暫勿黏上矯正器,讓通道完全讓給犬齒移動,等犬齒完成通過後,再行leveling即可,之後就是torque control(轉矩控制)
參考文獻(點入連結可以參考)
[PDF]Transmigration of Impacted Canines_ A Report of Tw
[PDF]Transmigration of Impacted Mandibular Canines — Report ...
[PDF]TRANSMIGRATION OF MANDIBULAR CANINE - e-Journal
[PDF]Transmigration of the Mandibular Canine: A Report of Two
[PDF]Unusual transmigration of canines – report of two
[PDF]First case of bimaxillary transmigration of impacted canines
[PDF]Bilateral transmigration of impacted mandibular canines
[PDF]Patterns of intra-osseous transmigration and ectopic
[PDF]transmigration of impacted mandibular canines
[PDF]Transmigration of impacted lower canine. Case report
[PDF]Transmigration of Mandibular Canine - Jaypee Journals
[PDF]Transmigration of Mandibular Canines: A Case Report
[PDF]Transmigration of Impacted Mandibular Canines: A Report
[PDF]Transmigration of mandibular canines: A review of literature
[PDF]Transmigration of Impacted Canines: Six Case Reports
[PDF]Full PDF - IOSR
[PDF]Transmigration of unerupted mandibular canine associated
[PDF]Transmigrated teeth - RGO
[PDF]Transmigration of Mandibular Canines: A Report of Six
[PDF]Early identification and management of mandibular canine
[PDF]Unusual Transmigration of Impacted Mandibular Canine
[PDF]Canine Migration in the Mandible – a Multidisciplinary
[PDF]Bilateral Mandibular Canine Impaction.pdf - Journal
[PDF]Transmigración de canino mandibular - Universidad
[PDF]Dentigerous cyst in - International Journal of Dental Case
[PDF]Download PDF of This Article - Journal Of Dental Herald
[PDF]CASE REPORT - Pittsburgh Orthodontist Morton S. Wintner
[PDF]EARLY WARNINGS OF PERMANENT MANDIBULAR
[PDF]fulltext (pdf) - Chinese Journal of Dental Research
[PDF]下颌尖牙异位1例 - 华西口腔医学杂志
[PDF]Full Text - PDF
[PDF]Transmigración del canino mandibular. Reporte de un caso ...
[PDF]MW efficacy in DSP
TRANSMIGRATION OF MANDIBULAR SECOND
[PDF]alt çenedeki kaninlerin gömülülük ve transmigrasyon insidansı
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