Fracture patterns after bilateral sagittal split osteotomy of the mandibular ramus according to the Obwegeser/Dal Pont and Hunsuck/Epker modifications.
The aim of this study was to compare the fracture patterns after sagittal split osteotomy according to Obwegeser/Dal Pont (ODP) and Hunsuck/Epker (HE), as well as to investigate the relationship between lateral bone cut ending or angle and the incidence of unfavorable/bad splits. Postoperative cone-beam computed tomograms of 124 splits according to ODP and 60 according to HE were analyzed. ODP led to 75.8% and HE led to 60% lingual fractures with mandibular foramen contact. Horizontal fractures were found in 9.7% and 6.7%, respectively, and unfavorable/bad splits were found in 11.3% and 10%, respectively. The lateral osteotomy angle was 106.22° (SD 12.03)° for bad splits and 106.6° (SD 13.12)° for favorable splits. Correlations were found between favorable fracture patterns and split modifications and between buccal ending of the lateral bone cut and bad splits (p < 0.001). No relationship was observed between split modifications (p = 0.792) or the osteotomy angle (p = 0.937) and the incidence of unfavorable/bad splits. Split modifications had no influence on the incidence of unfavorable/bad splits, but the buccal ending of the lateral bone cut did have an influence. More lingual fractures with mandibular foramen contact are expected with the ODP modification. The osteotomy angle did not differ between favorable and bad splits.
Department of Orthodontics (Head & Chairman: Prof. Dr. med. dent. Ulrike Fritz), University Hospital of the RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany; Department of Oral and Maxillofacial Surgery (Head & Chairman: Univ. Prof. Dr. med. Dr. med. dent. Frank Hölzle), University Hospital of the RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany. Electronic address: smoehlhenrich@ukaachen.de.
Stephan Christian
SC
Möhlhenrich
Department of Oral and Maxillofacial Surgery (Head & Chairman: Univ. Prof. Dr. med. Dr. med. dent. Frank Hölzle), University Hospital of the RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany.
Kristian
K
Kniha
Department of Oral and Maxillofacial Surgery (Head & Chairman: Univ. Prof. Dr. med. Dr. med. dent. Frank Hölzle), University Hospital of the RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany.
Florian
F
Peters
Department of Oral and Maxillofacial Surgery (Head & Chairman: Univ. Prof. Dr. med. Dr. med. dent. Frank Hölzle), University Hospital of the RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany.
Nassim
N
Ayoub
Department of Oral and Maxillofacial Surgery (Head & Chairman: Univ. Prof. Dr. med. Dr. med. dent. Frank Hölzle), University Hospital of the RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany.
Evgeny
E
Goloborodko
Department of Oral and Maxillofacial Surgery (Head & Chairman: Univ. Prof. Dr. med. Dr. med. dent. Frank Hölzle), University Hospital of the RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany.
Frank
F
Hölzle
Department of Orthodontics (Head & Chairman: Prof. Dr. med. dent. Ulrike Fritz), University Hospital of the RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany.
Ulrike
U
Fritz
Department of Oral and Maxillofacial Surgery (Head & Chairman: Univ. Prof. Dr. med. Dr. med. dent. Frank Hölzle), University Hospital of the RWTH Aachen, Pauwelsstraße 30, 52074 Aachen, Germany.
Ali
A
Modabber
D000328:Adult; D054893:Cone-Beam Computed Tomography; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible / Q000000981:diagnostic imaging / Q000473:pathology; D008337:Mandibular Fractures / Q000000981:diagnostic imaging / Q000209:etiology* / Q000473:pathology; D059229:Osteotomy, Sagittal Split Ramus / Q000379:methods*; D011859:Radiography
BSSO; Bilateral sagittal split osteotomy; Fracture pattern; Hunsuck/Epker; Obwegeser/Dal Pont