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Comparative Study of Skeletal Stability between Postoperative Skeletal Intermaxillary Fixation and No Skeletal Fixation after Bilateral Sagittal Split Ramus Osteotomy: an 18 Months Retrospective Study J Oral Maxillofac Res 2014 (Jan-Mar);5(1):e2 doi:10.5037/jomr.2014.5102 |
Comparative Study of Skeletal Stability between Postoperative Skeletal Intermaxillary Fixation and No Skeletal Fixation after Bilateral Sagittal Split Ramus Osteotomy: an 18 Months Retrospective Study
1Department of Oral and Maxillofacial Surgery, Aalborg University Hospital, Aalborg, Denmark.
2Department of Oral and Maxillofacial Surgery, Aarhus University Hospital, Aarhus, Denmark.
3Section of Oral Radiology, School of Dentistry, Health, Aarhus University, Aarhus, Denmark.
4Section of Biostatistics, School of Public Health, Health, Aarhus University, Aarhus, Denmark.
Corresponding author:
Department of Oral and Maxillofacial Surgery, Aarhus University Hospital
Noerrebrogade 44, Bygn 9D, DK-8000 Aarhus C
Denmark
Phone: +4578462927
Fax: +4578464442
E-mail: jenhar@rm.dk
ABSTRACT
Objectives: The purpose of the present study was to evaluate skeletal stability after mandibular advancement with bilateral sagittal split osteotomy.
Material and Methods: Twenty-six patients underwent single-jaw bilateral sagittal split osteotomy (BSSO) to correct skeletal Class II malocclusion. One group (n = 13) were treated postoperatively with skeletal elastic intermaxillary fixation (IMF) while the other group (n = 13) where threated without skeletal elastic IMF.
Results: The mean advancement at B-point and Pog in the skeletal elastic IMF group was 6.44 mm and 7.22 mm, respectively. Relapse at follow-up at B-point was -0.74 mm and -0.29 mm at Pog. The mean advancement at B-point and Pog in the no skeletal elastic IMF group was 6.30 mm and 6.45 mm, respectively. Relapse at follow-up at B-point was -0.97 mm and -0.86 mm at Pog. There was no statistical significant (P > 0.05) difference between the skeletal IMF group and the no skeletal group regarding advancement nor relapse at B-point or Pog.
Conclusions: Bilateral sagittal split osteotomy is characterized as a stable treatment to correct Class II malocclusion. This study demonstrated no difference of relapse between the skeletal intermaxillary fixation group and the no skeletal intermaxillary fixation group. Because of selection-bias and the reduced number of patients it still remains inconclusive whether to recommend skeletal intermaxillary fixation or not in the prevention of relapse after mandibular advancement.
J Oral Maxillofac Res 2014 (Jan-Mar);5(1):e2
doi:10.5037/jomr.2014.5102
Accepted for publication: 27 March 2014
Keywords: mandibular advancement; maxillomandibular fixation; orthognatic surgery; relapse; sagittal split ramus osteotomy; skeletal fixation.
To cite this article: Comparative Study of Skeletal Stability between Postoperative Skeletal Intermaxillary Fixation and No Skeletal Fixation after Bilateral Sagittal Split Ramus Osteotomy: an 18 Months Retrospective Study. J Oral Maxillofac Res 2014;5(1):e2 URL: http://www.ejomr.org/JOMR/archives/2014/1/e2/v5n1e2ht.htm |
Received: 13 February 2014 | Accepted: 27 March 2014 | Published: 1 April 2014
Copyright: © The Author(s). Published by JOMR under CC BY-NC-ND 3.0 licence, 2014.