Publications by authors named "Hyung-Joon Seo"

An encouraging outcome was described for the use of modified Furlow small double-opposing Z-plasty (sDOZ) using the medial incision (MIsDOZ) approach in repair of Veau type I cleft palate. This retrospective study assessed early results of using extended indication criterion of MIsDOZ for the management of consecutive non-syndromic patients with Veau II cleft palate treated by a single surgeon. Bardach two-flap plus sDOZ (two-flap approach) or medial incision approach with a tension-driven stepwise application of lateral palatal incisions (soft palate only, von Langenbeck type, or two-flap type) were applied.

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Intermediate rhinoplasty, the correction of cleft lip nose deformities, is performed between the time of primary and secondary rhinoplasties, which is at ~6 years of age. Although intermediate rhinoplasty reduces psychological stress in school-aged children through improvements in appearance, studies on intermediate rhinoplasty are scarce. Hence, in this study, we aimed to evaluate the long-term outcomes of intermediate rhinoplasty in patients with unilateral cleft lip.

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Background: Submucous cleft palate (SMCP) is a congenital anomaly characterized by the presence of Calnan's triad. However, in clinical practice, it is common for individuals to exhibit one or two anatomical abnormalities within the triad. Furthermore, the definition of SMCP has been diverse and ambiguous in literature.

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 Velopharyngeal insufficiency (VPI) is a major complication of cleft palate repair. The purpose of this study was to evaluate the incidence and predictive factors of VPI after cleft palate repair based on 27 years of one surgeon's experience.  Medical records were retrospectively reviewed for 652 patients who underwent cleft palate repair between 1995 and 2021.

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Objective: To assess the differences in scar outcomes between modified rotation-advancement techniques proposed by Drs. Mohler and Noordhoff, designed to address issues such as inadequate vertical lip length and scarring on the upper third of the lip in the original rotation-advancement technique.

Design: Retrospective single-surgeon (RD) study.

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Objective: To appraise the degree of intraoperative palatal lengthening with the modified Furlow small double-opposing Z-plasty (sDOZ).

Design: Retrospective single-surgeon (R.D.

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Article Synopsis
  • This study provides a comprehensive analysis of cranial growth patterns in a large sample of 1009 Korean children and adolescents, focusing on age- and sex-specific measurements.
  • Using thin-slice CT scans, researchers established key cranial parameters and created logarithmic curves for intracranial volume and other measurements, demonstrating that males generally have larger cranial dimensions than females.
  • The findings indicate that cranial measurements rapidly increase in the first few years of life and establish reference data that can aid in treating conditions like craniosynostosis in pediatric patients.
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Background: International travel had been radically disrupted by coronavirus disease 2019 (COVID-19), leaving traditional medical conferences on a 2-year hiatus. The International Craniofacial Chang Gung Group (ICC) was thus created to disseminate knowledge related to craniofacial surgery. This study aimed to reveal how webinars fundamentally transformed the traditional format of medical conferences.

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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.

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Objective: An inspiring early result with no oronasal fistula formation was recently described for a modified medial incision small double-opposing Z-plasty (MIsDOZ) for treating Veau type I cleft palate. This study describes an early single-surgeon experience in applying this newly proposed surgical approach.

Design: Retrospective single-surgeon study.

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 Surgical correction of bilateral cleft lip deformities remains one of the most challenging areas in facial plastic surgery. Many surgical techniques and conservative devices have been offered for the early management of bilateral cleft lip in infants. The purpose of this study was to evaluate the effect of lip adhesion on the lip and nose of patients with bilateral cleft lip.

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Background: Cleft lip and cleft palate are the most frequent congenital craniofacial deformities, with an incidence of approximately 1 per 700 people. Postoperative palatal fistula is one of the most significant long-term complications. This study investigated the incidence of postoperative palatal fistula and its predictive factors based on 25 years of experience at our hospital.

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Orthognathic surgery has steadily evolved, gradually expanding its scope of application beyond its original purpose of simply correcting malocclusion and the facial profile. For instance, it is now used to treat obstructive sleep apnea and to achieve purely cosmetic outcomes. Recent developments in three-dimensional digital technology are being utilized throughout the entire process of orthognathic surgery, from establishing a surgical plan to printing the surgical splint.

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Background: Revisional malarplasty is the most frequently performed and difficult to perform revision surgery among facial contouring surgeries. The incidence of postoperative complications and need for revision surgery is increasing because of indiscriminate malar reduction through a narrow surgical space. The authors analyzed cases of revisional malarplasty secondary to complications.

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To date, there have been no reports of patients showing a Tessier number 7 cleft with unilateral complete cleft lip and palate. Furthermore, no studies have established the sequence, plan, or timing of surgical methods for treating patients presenting the above anomalies simultaneously. We report a case of a Tessier number 7 cleft with unilateral complete cleft lip and palate.

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Long-term follow-up results of many surgical techniques for lip adhesion are unavailable. Thus, we report the surgical results of patients who underwent lip adhesions performed by a single surgeon. We retrospectively analyzed two-dimensional photographs of 29 patients aged 1 year who underwent lip adhesion and definite lip repair.

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Background/purpose: Three-dimensional computer-assisted orthognathic surgery allows to simulate the space between the mandibular ramus segments, i.e. intersegmental gap, for the correction of facial asymmetry.

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Background: Primary rhinoplasty has not been universally adopted because the potential for nasal growth impairment remains an unsolved issue in cleft care. This study's purpose was to assess the long-term effects of primary rhinoplasty performed by a single surgeon in a cohort of patients with a unilateral cleft lip nose deformity.

Methods: Three-dimensional nasal morphometric measurements (linear, angular, proportional, surface area, and volume) were collected from consecutive patients (cleft group, n = 52; mean age, 19 ± 1 year) who had undergone primary rhinoplasty with the use of the Noordhoff approach between 1995 and 2002 and reached skeletal maturity.

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Patient satisfaction with the shape and appearance of their nose after orthognathic surgery-based skeletofacial reconstruction is an important, but often overlooked, outcome. We assessed the nose-related outcomes through a recently developed patient-reported outcome instrument and a widely adopted 3D computer-based objective outcome instrument, to verify any correlation in the results produced by these tools. We collected FACE-Q nose appearance reports (2 scales) and 3D nasal morphometry (10 parameters) from patients with class III skeletal pattern and congenital cleft lip palate deformity (n = 23) or developmental dentofacial deformity (n = 23) after (>12 months) skeletofacial reconstruction.

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Background: This study investigated the outcomes of pharyngeal flap surgery in Asian patients with velopharyngeal dysfunction (VPD), with a focus on postoperative improvements in speech articulation and complications. Additionally, this study explored whether the cause of VPD and the timing of surgery affected outcomes in terms of speech improvement.

Methods: A retrospective review was conducted of the medical records of 72 Asian VPD patients who underwent pharyngeal flap surgery performed by a single surgeon from 1996 to 2014.

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Low fistula rate and a satisfactory speech outcome were previously reported by adopting a modified Furlow palatoplasty using small double-opposing Z-plasty (DOZ). The purposes of this study were to (1) describe the technical standardization of further modification of this small DOZ using the medial incision (MIDOZ) approach for Veau I cleft repair; (2) assess the early postoperative outcomes of a single surgeon's experience using this technique; and (3) evaluate the temporal association of this standardization with the necessity of lateral relaxing incisions.A prospective study (n = 24) was performed consecutively to non-syndromic patients with Veau I cleft palate who underwent MIDOZ approach.

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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, = 44) or a noncleft dentofacial deformity (noncleft cohort, = 22) and underwent 3D computer-assisted single-splint two-jaw surgery by a single multidisciplinary team between 2014 and 2018.

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Background: The evolving 3-dimensional computer-based technology revolutionized the field of orthognathic surgery (OGS). Digital occlusion setup for OGS may provide advantages in the planning comparing with the conventional approach based on the manual setup using dental casts, but we are not aware of any study focusing on digital occlusion setup for cleft OGS. The purposes of this study were to compare the conventional and digital occlusion setup approaches and to propose a protocol for digital occlusion setup in unilateral cleft OGS.

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