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第三节
Ⅱ类错 的早期干预

Ⅱ类错 进行早期干预的时机很重要,Araújo和 Buschang认为出现以下 3 种情况需要进行早期干预:①患者存在心理问题;②前牙外伤风险增加;③高角。尤其是出现前两种情况时,早期干预很有必要 [1]

一、上颌前突,伴随开唇露齿

过度唇倾的上颌前牙容易受到外伤,继发上颌骨骨骼发育异常。

解决方案:上颌 2×4 片段弓技术,配合口外弓(图2-15)。

1.上颌 2-2 粘托槽,0.012″、0.014″、0.016″、0.018″镍钛丝,过渡到 0.018″不锈钢丝。

2.0.018″不锈钢丝在上颌第一磨牙近中做欧米加曲,0.25mm结扎丝向后结扎,配合使用口外弓(图 2-16~图2-18)。

对于上颌前突早期矫治后的保持很重要,矫治后如果上颌尖牙尚未萌出,可使用Grace肌功能矫治器(图 2-19)保持。如果上颌尖牙已经萌出,则不需要额外保持。

二、下颌后缩

有些原则得铭记在心:①如果错 畸形原因在上颌,这个病例好做;如果错 畸形主要在下颌,这个病例不好做。②临床遇到的下颌后缩,如果是高角,矫治效果不理想;如果是均角或者低角,使用功能矫治器导下颌向前,会有不错的效果。当然,前提是患者自身要有足够好的骨骼生长潜力。功能矫治到底有没有效果,目前还没有肯定的答案。貌似我们只能做好那些能自己长好的病例。我们只能去除影响骨骼正常生长的错 畸形或者肌肉的异常影响因素。最终,骨骼的生长还要看患者自身的潜力。

有两种方案矫治下颌后缩。

1.斜导。肌激动器或者双 垫矫治器(twin jblock)等功能矫治器引导下颌向前(图 2-20、图 2-21)。具体适应证和使用方法,请参见Ⅱ类早期矫治章节。

2.来自著名的德国颅 面生长发育理论:上颌是鞋,下颌是脚。如果我们穿一双小鞋,走路的时候,脚位于鞋的后方;如果我们穿一双大鞋,走路的时候,脚位于鞋的前方。同理,如果上颌牙弓狭窄,咬合会使下颌靠后,如果扩大上颌牙弓,咬合能引导下颌向前。临床上,对于很多的替牙期下颌后缩的病例,可以上颌扩弓,通过“鞋拔子”(foot inshoe)效应(图 2-22),引导下颌向前。

图 2-15 上颌 2×4 片段弓

图 2-16 在上颌第一磨牙近中做欧米加曲

图 2-17 用 0.25mm结扎丝在欧米加曲上向后结扎

图 2-18 口外弓

图 2-19 Grace保持

图 2-20 斜导

图 2-21 Twin Block

图 2-22 “鞋拔子”效应示意图

参考文献

[1]Ara újo E.A.,Buschang P.H.,Recognizing and correctingdeveloping malocclusions:a problem-oriented approach toorthodontics[M]. WILEY Blackwell,2016:90-103.

[2]Czarnecki S.T.,Nanda R.S.,Currier G.F.,Perceptions of abalanced facial profile[J]. American journal of orthodontics anddentofacial orthopedics,1993,104(2):180-187.

[3]Spyropoulos M.N.,Halazonetis D.J.,Significance of the softtissue profile on facial esthetics[J]. American journal oforthodontics and dentofacial orthopedics,2001,119(5):464-471.

[4]Lepley C.R.,Throckmorton G.S.,Ceen R.F.,et al.,Relative contributions of occlusion,maximum bite force,and chewing cycle kinematics to masticatory performance[J]. American journal of orthodontics and dentofacial orthopedics,2011,139(5):606-613.

[5]Owens S.,Buschang P.H.,Throckmorton G.S.,et al.,Masticatory performance and areas of occlusal contact and near contact in subjects with normal occlusion and malocclusion[J]. American journal of orthodontics and dentofacial orthopedics,2002,121(6):602-609.

[6]Nelson W.E.,Higley L.B.,The length of mandibular basal bone in normal occlusion and class I malocclusion compared to class II,division I malocclusion[J]. American journal of orthodontics,1948,34(7):610-617.

[7]Michiels G.,Sather A.H.,Determinants of facial attractivenessin a sample of white women[J]. The International journal of adult orthodontics and orthognathic surgery,1994,9(2):95-103.

[8]McNamara J.A.,Jr.,Components of class II malocclusion in children 8-10 years of age[J]. The Angle orthodontist,1981,51(3):177-202.

[9]Baccetti T.,Franchi L.,McNamara J.A.,Jr.,et al.,Early dentofacial features of Class II malocclusion:a longitudinal study from the deciduous through the mixed dentition[J]. American journal of orthodontics and dentofacial orthopedics,1997,111(5):502-509.

[10]Arya B.S.,Savara B.S.,Thomas D.R.,Prediction of first molar occlusion[J]. American journal of orthodontics,1973,63(6):610-621.

[11]Bishara S.E.,Hoppens B.J.,Jakobsen J.R.,et al.,Changes in the molar relationship between the deciduous and permanent dentitions:a longitudinal study[J]. American journal of orthodontics and dentofacial orthopedics,1988,93(1):19-28.

[12]Jeelani W.,Fida M.,Shaikh A.,The duration of pubertal growth peak among three skeletal classes[J]. Dental press journal of orthodontics,2016,21(5):67-74.

[13]Drelich R.C.,A cephalometric study of untreated class II,division 1 malocclusion[J]. The Angle orthodontist,1948,18:70-75.

[14]Craig C.E.,The skeletal patterns characteristic of Class I and Class II,Division I malocclusions in norma lateralis[J].The Angle orthodontist,1951,21(1):44-56.

[15]Fisk G.V.,Culbert M.R.,Grainger R.M.,et al.,The morphology and physilogy of distoclusion[J]. American journal of orthodontics,1952,39:3-12.

[16]Menezes D.M.,Comparisons of craniofacial features of English children with Angle class II division l and Angle class I occlusions[J]. Journal of dentistry,1974,2(6):250-254.

[17]Ngan P.W.,Byczek E.,Scheick J.,Longitudinal evaluation of growth changes in Class II division 1 subjects[J]. Semin Orthod,1997,3(4):222-231.

[18]Stahl F.,Baccetti T.,Franchi L.,et al.,Longitudinal growth changes in untreated subjects with Class II Division 1 malocclusion[J]. American journal of orthodontics and dentofacial orthopedics,2008,134(1):125-137.

[19]Baccetti T.,Stahl F.,McNamara J.A.,Jr.,Dentofacial growth changes in subjects with untreated Class II malocclusion from late puberty through young adulthood[J]. American journal of orthodontics and dentofacial orthopedics,2009,135(2):148-154.

[20]Jacob H.B.,Buschang P.H.,Mandibular growth comparisons of Class I and Class II division 1 skeletofacial patterns[J].The Angle orthodontist,2014,84(5):755-761.

[21]Bishara S.E.,Bayati P.,Jakobsen J.R.,Longitudinal comparisons of dental arch changes in normal and untreated Class II,Division 1 subjects and their clinical implications[J]. American journal of orthodontics and dentofacial orthopedics,1996,110(5):483-489.

[22]Ast D.B.,Carlos J.P.,Cons N.C.,The Prevalence and Characteristics of Malocclusion among Senior High School Students in Upstate New York[J]. American journal of orthodontics,1965,51:437-445.

[23]Steigman S.,Kawar M.,Zilberman Y.,Prevalence and severity of malocclusion in Israeli Arab urban children 13 to 15 years of age[J]. American journal of orthodontics,1983,84(4):337-343.

[24]Peck S.,Peck L.,Kataja M.,Class II Division 2 malocclusion:a heritable pattern of small teeth in welldeveloped jaws[J]. The Angle orthodontist,1998,68(1):9-20.

[25]Lapatki B.G.,Mager A.S.,Schulte-Moenting J.,et al.,The importance of the level of the lip line and resting lip pressure in Class II,Division 2 malocclusion[J]. Journal of dental research,2002,81(5):323-328.

[26]Wallis S.F.,Integration of certain variants of the facial skeleton in Class II,division 2 malocclusion[J]. The Angle orthodontist,1963,33(1):60-67.

[27]Karlsen A.T.,Craniofacial characteristics in children with Angle Class II div. 2 malocclusion combined with extreme deep bite[J]. The Angle orthodontist,1994,64(2):123-130.

[28]Brezniak N.,Arad A.,Heller M.,et al.,Pathognomonic cephalometric characteristics of Angle Class II Division 2 malocclusion[J]. The Angle orthodontist,2002,72(3):251-257.

[29]Hitchcock H.P.,The cephalometric distinction of class II,division 2 malocclusion[J]. American journal of orthodontics,1976,69(4):447-454.

[30]Pancherz H.,Zieber K.,Hoyer B.,Cephalometric characteristics of Class II division 1 and Class II division 2 malocclusions:a comparative study in children[J]. The Angle orthodontist,1997,67(2):111-120.

[31]Godiawala R.N.,Joshi M.R.,A cephalometric comparison between class II,division 2 malocclusion and normal occlusion[J]. The Angle orthodontist,1974,44(3):262-267.

[32]Isik F.,Nalbantgil D.,Sayinsu K.,et al.,A comparative study of cephalometric and arch width characteristics of Class II division 1 and division 2 malocclusions[J]. European journal of orthodontics,2006,28(2):179-183.

[33]Al-Khateeb E.A.,Al-Khateeb S.N.,Anteroposterior and vertical components of class II division 1 and division 2 malocclusion[J]. The Angle orthodontist,2009,79(5):859-866.

[34]Barbosa L.A.G.,Araujo E.,Behrents R.G.,et al.,Longitudinal cephalometric growth of untreated subjects with Class II Division 2 malocclusion[J]. American journal of orthodontics and dentofacial orthopedics,2017,151(5):914-920. L5flSVD4QI3ZFjCipUWQsgyg0yKmNThnyisWHCFpePy3XFzy4xy47abdXnljr2db

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