Resistance of four fixation techniques used to treat subcondylar fractures
Lucas Cavalieri-Pereira1, Guilherme Spagnol2, Cássio Edvard Sverzut2
1Division of Oral and Maxillofacial Surgery, Piracicaba Dental School, State University of Campinas, Piracicaba, Brazil.
Objective:
This study aimed to evaluate the resistance of four fixation techniques used to treat subcondylar fractures. The following techniques were evaluated: fixation with one 4-hole single straight plate; fixation with one 2-mm 4-hole system plate and one 1.5-mm 3-hole system plate; fixation with two 2-mm plates with a 3-hole anterior plate; and fixation with two 2-mm plates with four holes each.
Study Design:
Each fixation technique was subjected to a resistance test. The load values were measured when displacement of 1, 2, and 5 mm was reached. Load values were compared for statistically significant differences using analysis of variance (ANOVA; p < 0.5) and Tukey's test.
Results:
Statistically significant differences were observed, when the load was applied to the first molar on the side of the fracture. The group treated with a 4-hole, 2-mm, one plate system showed resistance to lower load values than the groups treated with two plates in any combination.
Conclusions:
When the fracture was fixed using two plates, regardless of the kind of plates used, no statistically significant difference between the groups was observed. However, two plate systems showed better resistance than one plate systems.
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