Hyung Joon Seo

Dr. Hyung Joon Seo


Research Focus & Metrics

Academic Career Length

8Years (2019-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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Journal Article
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HSHyung Joon Seo
Hyung Joon Seo
Rafael DenadaiRafael Denadai
Rafael Denadai
Lun-Jou LoLun-Jou Lo
Lun-Jou Lo
Nasal deformity is associated with congenital cleft lip and palate. Primary rhinoplasty for reconstruction of the nasal deformity at the time of bilateral cleft lip repair is a controversial issue in cleft care due to traditional teaching concerning the potential impairment of nasal growth. This study assessed long-term nasal growth in patients with bilateral cleft lip and palate who underwent primary rhinoplasty by a single surgeon between 1995 and 2002 and reached skeletal maturity (n = 39; mean: 19 ± 2 years). Normal age-, gender-, and ethnicity-matched subjects (n = 52) were enrolled for comparative analyses. Three-dimensional nasal photogrammetric measurements (10 linear, 4 angular, 6 proportional, 1 surface area, and 1 volume parameter) were collected from patients with bilateral cleft lip and palate and normal subjects. Patients who underwent rhinoplasty presented with significantly (all p < 0.05) smaller nasal tip projection and nasal tip angles, but greater values for nasal dorsum length, nasal protrusion, alar width, columellar height, dome height, columellar angle, labiocolumellar angle, nasal tip height ratio, nasal index, alar width/intercanthal distance ratio, and alar width/mouth width ratio compared to normal subjects. There were no differences (all p > 0.05) in nasal height, tip/midline deviation, nasal dorsum angle, dome-to-columella ratio, columella height/alar width ratio, area surface, and volume parameters between the two groups. This study shows that primary rhinoplasty performed in patients with bilateral cleft lip and palate during infancy does not result in deficiency of the nasal dimensions relative to controls.

2 December 2019 in Journal of Clinical Medicine
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Journal Article
Open access
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HSHyung Joon Seo
Hyung Joon Seo
Rafael DenadaiRafael Denadai
Rafael Denadai
BPBetty Chien-Jung Pai
Betty Chien-Jung Pai
Lun-Jou LoLun-Jou Lo
Lun-Jou Lo
Despite the evident benefits of the modern surgery-first orthognathic surgery approach (reduced treatment time, efficient tooth decompensation, and early improvement in facial esthetics), the challenge of the surgical-occlusion setup acts as a hindering factor for the widespread and global adoption of this therapeutic modality, especially for the management of cleft-skeletofacial deformity. This is the first study to assess three-dimensional (3D) quantitative data of the surgical-occlusion setup in surgery-first cleft-orthognathic surgery. This comparative retrospective study was performed on 3D image datasets from consecutive patients with skeletal Class III deformity who had a unilateral cleft lip/palate (cleft cohort, n = 44) or a noncleft dentofacial deformity (noncleft cohort, n = 22) and underwent 3D computer-assisted single-splint two-jaw surgery by a single multidisciplinary team between 2014 and 2018. They received conventional orthodontics-first or surgery-first approaches. 3D quantitative characterization (linear, angular, and positional measurements) of the final surgical-occlusion setup was performed and adopted for comparative analyses. In the cleft cohort, the occlusion setup in the surgery-first approach had a significantly (all p < 0.05) smaller number of anterior teeth contacts and larger incisor overjet compared to the conventional approach. Considering the surgery-first approach, the cleft cohort presented significantly (all p < 0.05) larger (canine lateral overjet parameter) and smaller (incisor overjet, maxillary intercanine distance, maxillary intermolar distance, ratio of intercanine distance, and ratio of intermolar distance parameters) values than the noncleft cohort. This study contributes to the literature by providing 3D quantitative data of the surgical-occlusion setup in surgery-first cleft-orthognathic surgery, and delivers information that may assist multidisciplinary teams to adopt the surgery-first concept to optimize cleft care.

2 September 2022 in Medicine
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Journal Article
Open access
HJHo Yoon Jeong
Ho Yoon Jeong
Kyu-Sup ChoKyu-Sup Cho
Kyu-Sup Cho
YBYong Chan Bae
Yong Chan Bae
HSHyung Joon Seo
Hyung Joon Seo
Introduction: Saddle nose deformities are typically reconstructed with cartilage grafts; however, conchal cartilage grafts are and associated with a risk of damage to the posterior auricular ligament and insufficient amounts, and costal cartilage grafts require invasive surgery under general anesthesia. We proposed a double-layer dermofat graft as an alternative to these methods. Patient concerns: Two patients with type IV saddle nose deformity underwent reconstruction with nasal augmentation with a double-layer dermofat graft harvested from the gluteal sulcus. Diagnosis: After operation, photogrammetric analysis demonstrated an improvement in the dorsal depression area, which corresponded to the angle between the sellion, most depressed point, and pronasale. Rhinoplasty Outcome Evaluation questionnaire was assessed. Interventions: The graft was divided into 2 sections; the first section was implanted transversely into the depressed nasal framework, and the second section was inserted vertically from the nasion to the supratip break for augmentation. Outcomes: Both patients reported high satisfaction with the Rhinoplasty Outcome Evaluation questionnaire. The mean preoperative angle between the sellion, most depressed point, and pronasale was 157.8°, and the mean postoperative angle at 6 months was 176.9°. Conclusion: The simple method double-layer dermofat graft technique demonstrated excellent outcomes in saddle nose deformity correction, did not require cartilage, and was easily performed under local anesthesia.