ArticleJournal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons2021
A Better Understanding of Unilateral Condylar Hyperplasia of the Mandible.
Article in Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Functional stabilization and neuromuscular adaptation in active condylar hyperplasia: a comparative cohort study.Journal of oral & facial pain and headache · 2026Observational
- Decision-Making in Unilateral Progressive Condylar Growth of the Mandible: Biological Insights and the Role of Proportional Condylectomy.Journal of clinical medicine · 2026Review
- Expert consensus on treatment of condylar hyperplasia and secondary dento-maxillofacial deformities.International journal of oral science · 2026Article
- Three-Dimensional Displacement of Upper Cervical Vertebrae in Severe Mandibular Deviation Caused by Condylar Hyperplasia: A Tomographic Segmentation Study.Diagnostics (Basel, Switzerland) · 2026Article
- Surgery-first segmental orthognathic surgery for treatment of hemimandibular elongation: a novel modified modality.Frontiers in surgery · 2026Article
- Bilateral Condylar Hyperplasia: Importance of Its Diagnosis in the Treatment and Long-Term Stability of Skeletal Class III Correction.Diagnostics (Basel, Switzerland) · 2025Article
- Diagnostic Efficacy of Bone SPECT Techniques in Differentiating Unilateral and Bilateral Condylar Hyperplasia.Diagnostics (Basel, Switzerland) · 2024Article
- Evaluation of optimal single-photon emission computed tomography reference value and three-dimensional mandibular growth pattern in 54 Chinese unilateral condylar hyperplasia patients.Head & face medicine · 2023Article
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Authors and funding
5 authors.
Funding
Abstract
purposeOur current understanding of unilateral condylar hyperplasia (UCH) was put forth by Obwegeser. He hypothesized that UCH is 2 separate conditions: hemimandibular hyperplasia and hemimandibular elongation. This hypothesis was based on the following 3 assumptions: 1) the direction of overgrowth, in UCH, is bimodal-vertical or horizontal, with rare cases growing obliquely; 2) UCH can expand a hemimandible with and without significant condylar enlargement; and 3) there is an association between the condylar expansion and the direction of overgrowth-minimal expansion resulting in horizontal growth and significant enlargement causing vertical displacement. The purpose of this study was to test these assumptions. PATIENTS AND
methodsWe analyzed the computed tomography scans of 40 patients with UCH. First, we used a Silverman Cluster analysis to determine how the direction of overgrowth is distributed in the UCH population. Next, we evaluated the relationship between hemimandibular overgrowth and condylar enlargement to confirm that overgrowth can occur independently of condylar expansion. Finally, we assessed the relationship between the degree of condylar enlargement and the direction of overgrowth to ascertain if condylar expansion determines the direction of growth.
resultsOur first investigation demonstrates that the general impression that UCH is bimodal is wrong. The growth vectors in UCH are unimodally distributed, with the vast majority of cases growing diagonally. Our second investigation confirms the observation that UCH can expand a hemimandible with and without significant condylar enlargement. Our last investigation determined that in UCH, there is no association between the degree of condylar expansion and the direction of the overgrowth.
conclusionsThe results of this study disprove the idea that UCH is 2 different conditions: hemimandibular hyperplasia and hemimandibular elongation. It also provides new insights about the pathophysiology of UCH.
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