Three-dimensional changes in the temporomandibular joint after maxillary protraction in children with skeletal Class III malocclusion.

We evaluated 3-dimensional changes in the temporomandibular joints of children with skeletal Class III malocclusion and maxillary deficiency after facemask therapy for maxillary protraction. Eighteen children with anterior crossbite and a Class III molar relationship underwent facemask therapy for maxillary protraction, after which they exhibited positive overjet and a Class II molar relationship. Three-dimensional cone-beam computed tomography images of the patients were obtained before (T1) and after (T2) facemask protraction, and the 3-dimensional coordinates of the anatomical landmarks in T1 and T2 images were compared. After facemask therapy, the mandibular condyles of the patients were displaced outside, upward, and backward. Additionally, the anterior and posterior walls of the glenoid fossa had negative values for anteroposterior change. Three-dimensional analysis of the temporomandibular joint showed that facemask therapy resulted in bone apposition (to the anterior wall) and bone resorption (of the posterior wall) in the glenoid fossa. This bone remodeling resulted in upward and backward displacement of the condyle.(J Oral Sci 58, 501-508, 2016).

[1]  J. McNamara,et al.  Three-dimensional analysis of maxillary changes associated with facemask and rapid maxillary expansion compared with bone anchored maxillary protraction. , 2013, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[2]  L. Cevidanes,et al.  Three-dimensional assessment of mandibular and glenoid fossa changes after bone-anchored Class III intermaxillary traction. , 2012, American Journal of Orthodontics and Dentofacial Orthopedics.

[3]  L. Cevidanes,et al.  Three-dimensional assessment of maxillary changes associated with bone anchored maxillary protraction. , 2011, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[4]  H. El,et al.  Effects of 2 types of facemasks on condylar position. , 2010, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[5]  J. Årtun,et al.  Changes following the use of protraction headgear for early correction of Class III malocclusion. , 2010, The Angle orthodontist.

[6]  John B Ludlow,et al.  Precision of cephalometric landmark identification: cone-beam computed tomography vs conventional cephalometric views. , 2009, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[7]  Kyung-Suk Cha,et al.  Skeletal changes of maxillary protraction in patients exhibiting skeletal class III malocclusion: a comparison of three skeletal maturation groups. , 2009, The Angle orthodontist.

[8]  S. Rosenstein,et al.  Very early face mask therapy in Class III children. , 2009, The Angle orthodontist.

[9]  L. Franchi,et al.  Orthopedic treatment outcomes in Class III malocclusion. A systematic review. , 2008, The Angle orthodontist.

[10]  William R Proffit,et al.  Image analysis and superimposition of 3-dimensional cone-beam computed tomography models. , 2006, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[11]  P. Turley,et al.  The effects of maxillary protraction therapy with or without rapid palatal expansion: a prospective, randomized clinical trial. , 2005, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[12]  David C Hatcher,et al.  Comparison between traditional 2-dimensional cephalometry and a 3-dimensional approach on human dry skulls. , 2004, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[13]  J. McNamara,et al.  Long-term effects of Class III treatment with rapid maxillary expansion and facemask therapy followed by fixed appliances. , 2003, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[14]  P K Turley,et al.  Cephalometric changes after the correction of class III malocclusion with maxillary expansion/facemask therapy. , 1999, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[15]  J A McNamara,et al.  Craniofacial adaptations induced by chincup therapy in Class III patients. , 1999, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[16]  V. Pangrazio-Kulbersh,et al.  Effects of protraction mechanics on the midface. , 1998, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[17]  H. Baik,et al.  Assessment of skeletal and dental changes by maxillary protraction. , 1998, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[18]  H. Kılıçoğlu,et al.  Profile changes in patients with class III malocclusions after Delaire mask therapy. , 1998, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[19]  P. Ngan,et al.  Treatment response and long-term dentofacial adaptations to maxillary expansion and protraction. , 1997, Seminars in orthodontics.

[20]  T. Deguchi,et al.  Morphologic adaptation of temporomandibular joint after chincup therapy. , 1996, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[21]  J. Battagel,et al.  A comparative study of the effects of customized facemask therapy or headgear to the lower arch on the developing Class III face. , 1995, European journal of orthodontics.

[22]  H. Akan,et al.  An evaluation of the condylar position of the temporomandibular joint by computerized tomography in Class III malocclusions: a preliminary study. , 1994, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[23]  S J Chaconas,et al.  Biomechanical effects of maxillary protraction on the craniofacial complex. , 1987, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.