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Deuk-Hyun Mah,Su-Gwan Kim,Seong-Yong Moon,Ji-Su Oh,Jae-Seek You 대한구강악안면외과학회 2015 대한구강악안면외과학회지 Vol.41 No.1
Objectives: We retrospectively evaluated the impact of mandibular third molars on the occurrence of angle and condyle fractures. Materials and Methods: This was a retrospective investigation using patient records and radiographs. The sample set consisted of 440 patients with mandibular fractures. Eruption space, depth and angulation of the third molar were measured. Results: Of the 144 angle fracture patients, 130 patients had third molars and 14 patients did not. The ratio of angle fractures when a third molar was present (1.26 : 1) was greater than when no third molar was present (0.19 : 1; odds ratio, 6.58; P〈0.001). Of the 141 condyle fractures patients, the third molar was present in 84 patients and absent in 57 patients. The ratio of condyle fractures when a third molar was present (0.56 : 1) was lower than when no third molar was present (1.90 : 1; odds ratio, 0.30; P〈0.001). Conclusion: The increased ratio of angle fractures with third molars and the ratio of condyle fractures without a third molar were statistically signifi- cant. The occurrence of angle and condyle fractures was more affected by the continuity of the cortical bone at the angle than by the depth of a third molar. These results demonstrate that a third molar can be a determining factor in angle and condyle fractures.
Prognosis of Maxillary Sinus Augmentation in the Presence of Antral Pseudocyst
Deuk-Hyun Mah(마득현),Su-Gwan Kim(김수관),Ji-Su Oh(오지수),Jae-Seek You(유재식),Won-Gi Kim(김원기),Jung-Eun Yang(양정은),Hyoung-Sup Lim(임형섭) 대한치과의사협회 2016 대한치과의사협회지 Vol.54 No.10
Purpose: Antral pseudocyst is a common benign lesion that exists in the maxillary sinus. Because of this possible complication, controversy remains with respect to sinus floor elevation operations. The purpose of this study was to analyze the antral pseudocyst related to maxillary sinus augmentation. Patients and Methods: The radiographs of 268 patients who visited Chosun University Dental Hospital from 2008 to 2010 and underwent the maxillary bone grafting procedure were examined. Results: Of the 268 patients who underwent the maxillary bone grafting procedure, 5 patients (1.86%) were diagnosed with antral pseudocysts. In all cases, maxillary sinus floor elevation was performed without aspiration, biopsy or extraction of the antral pseudocyst. Conclusion: Antral pseudocysts are not considered a contraindication for maxillary sinus bone grafting procedure.
Deuk Hyun Mah,Su Gwan Kim,Ji Su Oh,Jae Seek You,Seo Yun Jung,Won Gi Kim,Kyung Hwan Yu 대한구강악안면외과학회 2017 대한구강악안면외과학회지 Vol.43 No.1
Objectives: The purpose of this study is to compare the postoperative stability of conventional orthognathic surgery to a surgery-first orthognathic approach after bilateral sagittal split ramus osteotomy (BSSRO). Materials and Methods: The study included 20 patients who underwent BSSRO for skeletal class III conventional orthognathic surgery and 20 patients who underwent a surgery-first orthognathic approach. Serial lateral cephalograms were analyzed to identify skeletal changes before surgery (T0), immediately after surgery (T1), and after surgery (T2, after 1 year or at debonding). Results: The amount of relapse of the mandible in the conventional orthognathic surgery group from T1 to T2 was 2.23±0.92 mm (P<0.01) forward movement and -0.87±0.57 mm (non-significant, NS) upward movement on the basis of point B and 2.54±1.37 mm (P<0.01) forward movement and -1.18±0.79 mm (NS) upward movement on the basis of the pogonion (Pog) point. The relapse amount of the mandible in the surgery-first orthognathic approach group from T1 to T2 was 3.49±1.71 mm (P<0.01) forward movement and -1.78±0.81 mm (P<0.01) upward movement on the basis of the point B and 4.11±1.93 mm (P<0.01) forward movement and -2.40±0.98 mm (P<0.01) upward movement on the basis of the Pog. Conclusion: The greater horizontal and vertical relapse may appear because of counter-clockwise rotation of the mandible in surgery-first orthognathic approach. Therefore, careful planning and skeletal stability should be considered in orthognathic surgery.
가족치아 이식재를 이용한 골결손부의 골유도재생술: 증례보고
마득현 ( Deuk Hyun Mah ),김수관 ( Su Gwan Kim ),오지수 ( Ji Su Oh ),이성규 ( Sung Kyu Lee ),정미애 ( Mi Ae Jeong ),김정선 ( Jeong Sun Kim ),김승희 ( Seung Hee Kim ) 조선대학교 구강생물학연구소 2012 Oral Biology Research (Oral Biol Res) Vol.36 No.1
Following installation of implant #36, guided bone regeneration was performed on a 57-year-old male patient for treatment of abuccal bone defect. The fl ap was elevated three months later, resulting insatisfactory bone regeneration on the buccal side of the implant during the second surgery. Tooth bone graft material, which has excellent osteoconduction and osteoinduction, has been evaluated as an ideal alternative to bone graft material. Further study of this material will be needed.
상악동저 삭제드릴을 이용한 상악동 거상술 후전산화 단층촬영을 이용한 형태학적 연구 증례보고
마득현 ( Deuk Hyun Mah ),김수관 ( Su Gwan Kim ),오지수 ( Ji Su Oh ),유재식 ( Jae Seek You ),정경인 ( Kyung In Jeong ),김철만 ( Cheol Man Kim ),임경섭 ( Kyung Seop Lim ) 조선대학교 치의학연구원 2014 Oral Biology Research (Oral Biol Res) Vol.38 No.1
Several methods for sinus lifting have been developed for implant installation on the maxillary posterior edentulous area with an alveolar bony defect. The major complication for sinus lifting is sinus membrane perforation, and the crestal approach technique has drawbacks that make it impossible to directly ascertain membrane perforation. Lately, the hydraulic pressure technique was developed for prevention of sinus membrane perforation as well as to obtain an ideal shape of the bone graft material. For sinus lifting, this method reveals a lower part of the membrane using a specially designed drill that elevates the membrane using hydraulic pressure. This method enables the operator to elevate the sinus membrane and bone graft regularly. In this study, morphologic analysis was performed with computed tomography to evaluate the peri-implant bony shape after sinus lifting with a sinus lift drill using hydraulic pressure.
You, Jae-Seek,Kim, Su-Gwan,Oh, Ji-Su,Jeong, Gyeong-Dal,Mah, Deuk-Hyun Korean Association of Maxillofacial Plastic and Re 2013 Maxillofacial Plastic Reconstructive Surgery Vol.35 No.5
Maxillary sinus membrane elevation and bone graft have been performed routinely in alveolar bone with insufficient residual bone height. There are a number of causes for development of maxillary sinusitis after these procedures. When maxillary sinusitis is caused by sinus membrane elevation, bone graft, and implant placement, various treatment such as medication, incision and drainage (I&D), implant removal, and the Caldwell-Luc procedure can be considered. Removal of an implant or the Caldwell-Luc procedure can be harmful if inflammation is not present in the oral cavity and survival of grafted bone and implant osseointegration can be expected despite the presence of maxillary sinusitis. In this case, functional endoscopic sinus surgery, which was often used in the otorhinolaryngology department, was performed without removal of the implant for a patient with maxillary sinusitis after one month following implant placement. Thus, we report on this case with a review of the literature.