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1 Dental Medicine Research , ,, Fig 3A Convex Fig 1A overjet 57 mm overbite 42 mm Angle Angle 15 mm 25 mm Fig 2A X X ANB 60 U1 to SN plane 1054 IMPA 1006 Table 1 CT Fig 4A, B 417 mm overjet Angle Angle

194 Y Ichikawa and others Fig 2 Fig 1 Facial photographs A: First record 27Y3M B: Post-treatment 31Y1M

cephalometric analysis First Record Post-treatment Variables 27Y3M 31Y1M SNA 830 837 SNB 770 785 ANB 60

上下顎の正中補正臼歯部における Angle Ⅰ級関係の確立ならびに個性正常咬合の獲得を目標に保存不可能な上顎右側側切歯上顎左側第一小臼歯および下顎両側第二小臼歯を抜去し上顎右側で犬歯を側切歯に

2 194 Y Ichikawa and others Fig 2 Fig 1 Facial photographs A: First record 27Y3M B: Post-treatment 31Y1M Dental Med Res 33 Intraoral photographs A: First record 27Y3M B: Post-treatment 31Y1M Table 1 Lateral cephalometric analysis First Record Post-treatment Variables 27Y3M 31Y1M SNA SNB ANB FMA IMPA FMIA U1-SN overjet mm overbite mm 正常被蓋の獲得上下顎の正中補正臼歯部における Angle Ⅰ級関係の確立ならびに個性正常咬合の獲得を目標に保存不可能な上顎右側側切歯上顎左側第一小臼歯および下顎両側第二小臼歯を抜去し上顎右側で犬歯を側切歯に第一小臼歯を犬歯とみなした排列にて咬合を再構築することとした Fig 3 Panoramic radiographs A: First record 27Y3M B: Post-treatment 31Y1M

Dental Med Res 33 195 Fig 4 Cone beam computed tomography images A: Volume data B: Horizontal multi planar reconstruction data 0018 0025 0014 0016 NiTi 0016 0016 SS 0012 NiTi 0014 NiTi

3 Dental Med Res Fig 4 Cone beam computed tomography images A: Volume data B: Horizontal multi planar reconstruction data NiTi SS 0012 NiTi 0014 NiTi SS SS SS SS Fig 5B Fig 5C Fig 5A Fig 2B Fig 1B Fig 6 U1-SN IMPA FMA overjet 25 mm overbite 15 mm Table 1 X Fig 3B /

196 Y Ichikawa and others Dental Med Res 33 Fig 6 Cephalometric superimposition, First record 27Y3M ;, Post-treatment 31Y1M Fig 5 Mandibular movement A: Intraoral photograph of protrusive sliding

4 196 Y Ichikawa and others Dental Med Res 33 Fig 6 Cephalometric superimposition, First record 27Y3M ;, Post-treatment 31Y1M Fig 5 Mandibular movement A: Intraoral photograph of protrusive sliding movement B: Intraoral photograph of right lateral sliding movement C: Intraoral photograph of left lateral sliding movement Fig 1A Fig 4A, B cementoenamel junction NiTi 0014 NiTi Fig 1B Fig 2B Fig 5A 9 Fig 2B Fig 5B 10

5 Dental Med Res Katada H, Terakado K, Sueishi K: Case reports of orthodontic treatment of maxillary central incisors with short roots Bull Tokyo Dent Coll, 53: , Aizenbud D, Zaks M, Abu-El-Naaj I, Rachmiel A, Hazan- Molina H: Mandibular premolar autotrans plantation in cleft affected patients: The replacement of congenital missing teeth as part of the cleft patient s treatment protocol J Craniomaxillofac Surg, 41: , Pasam N, Raja S: Full mouth rehabilitation Indian J Dent Adv, 2: , Reitan K, Rygh P: Biomechanical principles and reactions Orthodontic Current Principles Techniques, Mosby-Year Book, , Angle II 25: , Park HJ, Okadakage S, Sato Y, Akamatsu Y, Tai K: Orthodontic treatment of a congenitally missing maxillary lateral incisor J Esthet Restor Dent, 22: , : 43: 80 82, de Molon RS, de Avila ED, de Souza JA, Nogueira AV, Cirelli CC, Cirelli JA: Combination of orthodontic movement and periodontal therapy for full root coverage in a Miller class III recession: a case report with 12 year of follow-up Braz Dent J, 23: , : Angle II Orhod Waves, 59: , Simon J, Declan T, Bridget D, David R, Helen V: Orthodontic retention: A systematic review J Orthod, 33: , 2006 Yuta ICHIKAWA, Tetsutaro YAMAGUCHI and Koutaro MAKI Department of Orthodontics, Showa University School of Dentistry Kitasenzoku, Ohta-ku, Tokyo, Japan Received February 28, 2013 ; Accepted for publication May 23, 2013 Abstract: In clinical practice, teeth with hypoplasia, devitalization, or caries are preferentially extracted for convenience as part of orthodontic treatment strategy In such cases, to obtain ideal esthetic results, tooth shape, the contours of gingival margins and function should be considered before starting orthodontic treatment 27-year-3-month-old female whose chief complaints were crowding, maxillary protrusion and midline deviations of upper and lower She had a skeletal class II with hopeless upper right lateral incisor The treatment objectives were to establish a Class I molar relationship, and to obtain proper interdigitation and an ideal overbite and overjet Orthodontic treatment involved the extraction of the upper right lateral incisor, upper left first premolar, and lower second premolars on both sides, and the use of an edgewise appliance In the extraction case of incisor, the orthodontists should be aware of the tooth morphology and the morphology of gingival contours When aligning the first premolar as the canine, it is common to avoid cuspal interference by reforming the lingual cusp of the first premolar Moreover, in this case, maxillary right canine gingival recession may happen for thin alveolar bone However, we were eventually able to avoid cuspal interference, recession by performing tooth movement only, and achieved good function without interference However, it is also important to note that the observation of stable occlusion Key words: Class II malocclusion, hopeless teeth

A Angle mmmm A X A SNASNB ANBFMA Uto FHFMIAUto NA mmlto NBmm Angle Distal Jet Distal Jet Distal Jet Distal Jet Distal Jet Distal Jet slot pre adjusted

A Angle mmmm A X A SNASNB ANBFMA Uto FHFMIAUto NA mmlto NBmm Angle Distal Jet Distal Jet Distal Jet Distal Jet Distal Jet Distal Jet slot pre adjusted key words Angle Acasereport of Angle Class II div. 1 with extraction of the upper second molars and the upper and lower four first premolars HIROKO TANAKA Aichi prefecture Obayashi Dental Clinic Summary