These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Anterior open-bite malocclusion: stability of maxillary repositioning using rigid internal fixation.
    Author: Arpornmaeklong P, Heggie AA.
    Journal: Aust Orthod J; 2000 Jul; 16(2):69-81. PubMed ID: 11201967.
    Abstract:
    A retrospective cephalometric study was performed to investigate the stability of 37 non-growing anterior open-bite cases using mini-plate rigid fixation. The sample was divided into two groups: Group A: maxillary repositioning alone (17 cases) and Group B: bimaxillary surgery (20 cases). Tracings were performed pre-operatively (T1), immediately post-operatively (T2) and at a minimum of one year follow-up (T3) (12-90 months). In Group A, the maxilla was advanced (3.8 +/- 2.8 mm, p < 0.01) and superiorly repositioned at PNS (2.8 +/- 2.3 mm, p < 0.001). In Group B, the maxilla was advanced (3.5 +/- 3.0 mm, p < 0.01) and superiorly repositioned at PNS (3.7 +/- 1.8 mm, p < 0.001); and the mandible (11.7 +/- 3.8 mm, p < 0.001), with no significant change in the vertical plane (p > 0.05). Late relapse due to condylar remodelling or resorption was found as a cause of large horizontal relapse (8.0 < x < 14.0 mm) in three cases (15%), the amount being associated with the amount of operative advancement (r = 0.7, r-sq = 40%, p < 0.01). It was concluded that the correction of anterior open bite by posterior repositioning of the maxilla using rigid fixation is a stable procedure during the follow-up period, and that in bimaxillary cases, post-operative stability depends largely on the stability of the mandibular advancement, which in turn relates to the amounts of advancement, the pre-operative anterior open bite and the mandibular plane angle.
    [Abstract] [Full Text] [Related] [New Search]