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Open versus closed treatment for extracapsular fracture of the mandibular condyle
Junyeong Lee(Junyeong Lee),Hee-Yeoung Jung(Hee-Yeoung Jung),Jaeyoung Ryu(Jaeyoung Ryu),Seunggon Jung(Seunggon Jung),Min-Suk Kook(Min-Suk Kook),Hong-Ju Park(Hong-Ju Park),Hee-Kyun Oh(Hee-Kyun Oh) 대한구강악안면외과학회 2022 대한구강악안면외과학회지 Vol.48 No.5
Objectives: Selection of treatment methods for mandibular condylar fractures remains controversial. In this study, we investigated treatment methods for condylar fractures to determine the indications for open or closed reduction. Patients and Methods: Patients >12 years of age treated for mandibular condylar fractures with a follow-up period of ≥3 months were included in this study. The medical records of enrolled patients were reviewed for sex, age, fracture site, treatment method (open or closed reconstruction), postop-erative intermaxillary fixation period, operation time, and complications. Radiological analysis of fracture fragment displacement and changes in ramal height difference was performed using computed tomography and panoramic radiography. Results: A total of 198 patients was investigated, 48.0% (n=95) of whom underwent closed reduction and 52.0% (n=103) underwent open reduction. There was no significant correlation between reduction method and patient sex, age, or follow-up period. No statistically significant difference between the incidence of complications and treatment method was observed. None of the patients underwent open reduction of condylar head fracture. Binary logistic regression analysis showed that open reduction was significantly more frequent in patients with subcondylar fracture compared to in those with a fracture in the condylar head area. There was no statistically significant correlation between the groups and fracture fragment displacement. However, there was a significant difference between the treatment groups in amount of change in ramal height difference between the fractured and the non-fractured sides during treatment. Conclusion: No significant clinical differences were found between the open and closed reduction methods in patients with mandibular condylar fractures. According to fracture site, closed reduction was preferred for condyle head fractures. There was no significant relationship between fracture fragment displacement and treatment method.
Differential expression of immunologic proteins in gingiva after socket preservation in mini pigs
JUNG, Seunggon,YANG, Hee-Young,LEE, Tae-Hoon Faculdade de Odontologia de Bauru da Universidade 2015 Journal of applied oral science Vol.23 No.2
<P>During healing following tooth extraction, inflammation and the immune response within the extraction socket are related to bone resorption. </P><P><B>Objective</B></P><P>: We sought to identify how the alloplastic material used for socket preservation affects the immune responses and osteoclastic activity within extraction sockets.</P><P><B>Material and Methods</B></P><P> : Using a porcine model, we extracted teeth and grafted biphasic calcium phosphate into the extraction sockets. We then performed a peptide analysis with samples of gingival tissue from adjacent to the sockets and compared the extraction only (EO) and extraction with socket preservation (SP) groups. We also used real-time polymerase chain reaction (PCR) to evaluate the expression level of immunoglobulins, chemokines and other factors related to osteoclastogenesis. Differences between the groups were analyzed for statistical significance using paired t tests.</P><P><B>Results</B></P><P> : Levels of IgM, IgG and IGL expression were higher in the EO group than in the SP group 1 week post-extraction, as were the levels of CCL3, CCL5, CXCL2, IFN-γ and TNF-α expression (p<0.05). In addition, receptor activator of nuclear factor kappa-B ligand (RANKL) was also significantly upregulated in the EO group (p<0.05), as were IL-1β, IL-6 and IL-8 (p<0.05).</P><P><B>Conclusions</B></P><P> : These results suggest that the beneficial effect of socket preservation can be explained by suppression of immune responses and inflammation.</P>
Surgical Enucleation of the Mucocele on the Inferior Orbit Using Transantral Approach
Jung, Seunggon,Oh, Hee-Kyun,Park, Hong-Ju,Kook, Min-Suk by Mutaz B. Habal, MD. 2015 JOURNAL OF CRANIOFACIAL SURGERY - Vol.26 No.6
ABSTRACT: The mucocele on the inferior orbit is infrequent. When there is occurrence on the inferior orbit, the infraorbital approach, such as transantral, subciliary approach is used commonly. But because of some side effects, the authors use transantral approach intraorally. A 26-year-old woman visited our department with complaint of palpable mass. Computed tomography (CT) disclosed cystic lesion on the left inferior orbit. Surgical approach to the lesion was established with bony window opening on the anterior maxillary wall intralorally. Medpor sheet was placed on orbital floor after the removal of the lesion. Histopathologically, the lesion was diagnosed as mucocele. Orbital volume was kept well after the operation and no ocular sequela was observed.
정승곤(Seunggon Jung) 대한치과의사협회 2016 대한치과의사협회지 Vol.54 No.10
Orbital fractures have a significant portion in facial bone trauma. The important thing in treatment of orbital fractures is variable depending on the patient. Reconstruction of orbital wall demands an understanding of the anatomy and function of the orbit, including the orbital tissues, and the approacheds, materials, and methods available.
가토의 두개골에서 Pore의 유무에 따른 티타늄 반구에서의 골형성 능
박정표,오철중,정승곤,박홍주,오희균,유선열,국민석,Park, Jung-Pyo,Oh, Chul-Jung,Jung, Seunggon,Park, Hong-Ju,Oh, Hee-Kyun,Ryu, Sun-Youl,Kook, Min-Suk 대한악안면성형재건외과학회 2013 Maxillofacial Plastic Reconstructive Surgery Vol.35 No.1
Purpose: This study is performed to determine the effects of titanium cap with various sizes of pores on bone formation during guided bone regeneration (GBR). Methods: Calvaria from 10 adult male rabbits were chosen as the recipient sites. A trephine bur with a diameter of 10 mm was used to form one round groove on each side of sagittal suture of the cranium, and a round bur with a diameter of 1.5 mm was used to form 6 small holes on the inner circles of round grooves to induce bleeding. In the control group, bone graft was not conducted, and closed titanium cap was fixed in the round groove. Bone graft was not performed in groups 1 and 2, but fixed on titanium caps with 0.2 mm, and 0.5 mm sized pores, respectively. For groups 3, 4, and 5, a synthetic bone graft material (${\beta}$-tricalcium phosphate, Cerasorb$^{(R)}$, Germany) was transplanted, and titanium caps without pore, with 0.2 mm and 0.5 mm sized pore were fixed, respectively. The animals were sacrificed 4 weeks after, and clinical, radiographical, and histomorphometrical evaluation of bone regeneration was performed. Results: In all groups, there were no clinical signs of infection, inflammation or wound dehiscence. Radiographic evaluation revealed well-defined semi-circular radiopacity inside the titanium cap of groups 3, 4, and 5. Histologically, the inner surface of the hemisphere was evenly lined with newly formed bone tissue, as well as grafted bone material in the group 3. In groups 4 and 5, the insertion of connective tissue was observed along the inner surface. However, the overall surface area between the grafts with different holes yielded no statistical significance in the histomorphometrical evaluation. Conclusion: Although the total area of newly formed bone showed no significant difference, excellent bone formation tendency was observed histologically when closed caps were used with bone graft was accompanied.
Le Fort I 골절단술을 이용한 상악골 전진 후 안정성에 관한 3차원적 연구
오철중,허정우,정광,조민성,정승곤,박홍주,오희균,유선열,국민석,Oh, Chul-Jung,Hur, Jung-Woo,Chung, Kwang,Cho, Min-Sung,Jung, Seunggon,Park, Hong-Ju,Oh, Hee-Kyun,Ryu, Sun-Youl,Kook, Min-Suk 대한악안면성형재건외과학회 2013 Maxillofacial Plastic Reconstructive Surgery Vol.35 No.2
Purpose: This study evaluated postoperative maxillary stabilities in patients with skeletal Class III malocclusion who were taken both maxillary advancement surgery and mandibular retrusive surgery, using Le Fort I osteotomy, through three-dimensional computed tomography. Methods: We selected 14 patients who were taken postoperative three-dimensional computerized tomography at the time before surgery, immediately after surgery, six months after surgery among the patients undergone both maxillary advancement surgery using Le Fort I osteotomy and mandibular retrusive surgery using bilateral sagittal split ramus osteotomy. We measured and compared the vertical distance of A-point and posterior nasal spine (PNS), the horizontal distance of A-point and PNS in transverse plane and coronal plane of the three-dimensional reconstructed images, respectively. Results: In transverse plane, the distance difference between immediately after surgery ($S_1$) and immediately before surgery ($S_0$) of A-point was $-0.04{\pm}1.80$ mm, $S_2$ and $S_0$ was $-0.15{\pm}1.69$ mm, and between $S_1$ and $S_2$ was $0.11{\pm}0.58$ mm. There were no significant differences between these data (P>0.05). In transverse plane, the distance between $S_1-S_0$ of PNS was $-3.87{\pm}2.37$ mm, $S_2-S_0$ of PNS was $-3.79{\pm}2.39$ mm, and $S_1-S_2$ of PNS was $-0.08{\pm}0.18$ mm. There were significant differences between these data (P<0.05). In coronal plane, the distance between $S_1-S_0$ of A-point was $3.99{\pm}0.86$ mm, $S_2-S_0$ was $3.57{\pm}1.09$ mm, and $S_1-S_2$ was $0.42{\pm}0.42$ mm. There were significant differences between these data (P<0.05). In coronal plane, the distance between $S_1-S_0$ of PNS was $3.82{\pm}0.96$ mm, $S_2-S_0$ was $3.43{\pm}0.91$ mm, and $S_1S_2$ was $0.39{\pm}0.49$ mm. There were significant differences between these data (P<0.05). In transverse plane, it was estimated that PNS has no statistical postoperative stability in the same direction. In coronal plane, it was estimated that both A-point and PNS had no statistical postoperative stability (P<0.05). Conclusion: Clinically, the operation plan needs to take into account of the maxillary relapse.