title: Predictability and accuracy of maxillary repositioning during bimaxillary surgery using a three-dimensional positioning technique.
abstract: OBJECTIVE
  The purpose of this retrospective study was to evaluate the predictability and accuracy of maxillary repositioning during bimaxillary surgery using a three-dimensional positioning technique.
  
  
  METHODS
  Twenty-six adult patients who underwent bimaxillary surgery requiring high superior maxillary impactions were divided into 2 groups. In group A, a three-dimensional positioning technique during maxillary repositioning was used along with an intermediate occlusal splint. In group B, only an intermediate occlusal splint with internal reference points was used. Both groups had measurements from predictive tracings compared to postoperative cephalograms to assess the accuracy of horizontal and vertical movements of the maxilla.
  
  
  RESULTS
  Group A showed excellent correlation between the planned and actual maxillary positions in vertical and horizontal dimensions. In group B, the maxilla tended to move anteriorly than planned.
  
  
  CONCLUSIONS
  Use of the three-dimensional positioning technique offered a predictive and accurate method for maxillary repositioning.
authors.affiliation: Division of Oral Medicine, Department of Physical Functions, Kyushu Dental University, Kitakyushu, Japan.
authors.forename: Shinya
authors.initials: S
authors.lastname: Kokuryo
authors.affiliation: Division of Oral and Maxillofacial Surgery, Department of Physical Functions, Kyushu Dental University, Kitakyushu, Japan.
authors.forename: Manabu
authors.initials: M
authors.lastname: Habu
authors.affiliation: Division of Oral Medicine, Department of Physical Functions, Kyushu Dental University, Kitakyushu, Japan.
authors.forename: Ikuya
authors.initials: I
authors.lastname: Miyamoto
authors.affiliation: Division of Oral and Maxillofacial Surgery, Department of Physical Functions, Kyushu Dental University, Kitakyushu, Japan.
authors.forename: Masataka
authors.initials: M
authors.lastname: Uehara
authors.affiliation: Division of Oral and Maxillofacial Surgery, Department of Physical Functions, Kyushu Dental University, Kitakyushu, Japan.
authors.forename: Masaaki
authors.initials: M
authors.lastname: Kodama
authors.affiliation: Division of Oral and Maxillofacial Surgery, Department of Physical Functions, Kyushu Dental University, Kitakyushu, Japan.
authors.forename: Kenjiro
authors.initials: K
authors.lastname: Iwanaga
authors.affiliation: Division of Oral Medicine, Department of Physical Functions, Kyushu Dental University, Kitakyushu, Japan. Electronic address: r13yoshioka@fa.kyu-dent.ac.jp.
authors.forename: Izumi
authors.initials: I
authors.lastname: Yoshioka
authors.affiliation: Division of Oral and Maxillofacial Surgery, Department of Physical Functions, Kyushu Dental University, Kitakyushu, Japan.
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Tominaga
mesh_terms: D000293:Adolescent; D000328:Adult; D002508:Cephalometry; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional; D019248:Jaw Fixation Techniques / Q000295:instrumentation*; D008297:Male; D008437:Maxilla / Q000002:abnormalities* / Q000601:surgery*; D003765:Models, Dental; D017090:Occlusal Splints; D019340:Osteotomy, Le Fort; D059229:Osteotomy, Sagittal Split Ramus; D010347:Patient Care Planning; D012189:Retrospective Studies; D016896:Treatment Outcome