High condylectomy versus proportional condylectomy: is secondary orthognathic surgery necessary?
The objective of this study was to assess the need for secondary orthognathic surgery in patients undergoing two different condylectomy protocols for active unilateral condylar hyperplasia (UCH). A retrospective cohort study evaluated UCH patients treated by condylectomy. Two groups were established: group 1 comprised those who had undergone a high condylectomy (5 mm removed) and group 2 comprised those who had undergone a proportional condylectomy (removing the difference observed between the measurements of the hyperplastic and the healthy side). Data analysis was done with the Levene test and t-test; a P-value of <0.05 indicated a statistically significant relationship. Forty-nine patients, with an average age of 19.83 years, were analyzed; 11 were included in group 1 and 38 in group 2. There was no statistical difference between the two groups with regard to age or sex (P=0.781). An average of 5.81 mm was removed in the high condylectomy group, while an average of 9.28 mm was removed in the proportional condylectomy group; this difference was statistically significant (P=0.042). Comparing the two groups, proportional condylectomy reduced the need for secondary orthognathic surgery (P<0.001). The proportional condylectomy can be used as the sole surgical treatment in cases of UCH, thus avoiding the need for secondary orthognathic surgery.
Maxillofacial Department, Hospital del Salvador, Santiago, Chile; Hospital San Borja Arriarán, Santiago, Chile; Oral and Maxillofacial Surgery, Universidad de Chile, Santiago, Chile. Electronic address: rofari@gmail.com.
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R
Fariña
Division of Oral and Maxillofacial Surgery, Universidad de La Frontera, Temuco, Chile; Center for Biomedical Research, Universidad Autónoma de Chile, Temuco, Chile.
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S
Olate
Oral and Maxillofacial Surgery, Universidad de Chile, Santiago, Chile.
A
A
Raposo
Oral and Maxillofacial Surgery, Universidad de Chile, Santiago, Chile.
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I
Araya
Maxillofacial Department, Dentistry School, Universidad de La Frontera, Temuco, Chile; Maxillofacial Department, Hospital Hernán Henríquez Aravena, Temuco, Chile.
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JP
Alister
Maxillofacial Department, Dentistry School, Universidad de La Frontera, Temuco, Chile; Maxillofacial Department, Hospital Hernán Henríquez Aravena, Temuco, Chile.
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F
Uribe
D005146:Facial Asymmetry / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D005260:Female; D006801:Humans; D006965:Hyperplasia; D008297:Male; D008335:Mandibular Condyle / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery*; D063168:Mandibular Osteotomy; D009971:Orthodontics, Corrective; D056948:Orthognathic Surgical Procedures; D059229:Osteotomy, Sagittal Split Ramus; D026741:Physical Therapy Modalities; D012086:Reoperation; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome; D055815:Young Adult
condylar hyperplasia; condylectomy; facial asymmetry; hemimandibular elongation; hemimandibular hypertrophy; high condylectomy; low condylectomy; mandibular condyle; orthognathic surgery; proportional condylectomy