구개근 절제술을 이용한 상악 제일 대구치의 치료

정성념,Jeong, Seong-Nyum 대한치주과학회 2009 Journal of Periodontal & Implant Science Vol.39 No.3

Purpose: Root resection can be a valuable procedure when the tooth in question has a high strategic value. The prognosis of root resection has been well documented in previous studies, but the results focused on the palatal root resection have not been discussed in depth. I represent here the short term effectiveness of palatal root resection of maxillary first molars. Methods: Palatal root resection was performed on maxillary first molars of three patients. All the palatal roots were floating state on the radiographic finding and showed full probing depth and purulent exudation at initial examination. Reduction of palatal cusp and occlusal table was performed concomitantly. Endodontic therapy was completed after root resection. Results: Compromised maxillary first molars were treated successfully by palatal root resection in 3 cases. The mobility of resected tooth was decreased a little bit. The probing pocket depth of remaining buccal roots was not increased compared to initial depth. All the patients satisfied with comfort and cost effective results and the fact they could save their natural teeth. Conclusions: Within the above results, palatal root resection is an effective procedure treating compromised maxillary first molar showing advanced palatal bone loss to root apex with or without pulp involvement when proper case selection is performed.

저용량 독시싸이클린 투여가 당뇨환자 마치 성인성 치주염 환자의 치은열구액내 효소 활성도에 미치는 영향에 관한 비교연구

정성념,한수부,Jeong, Seong-Nyum,Han, Soo-Boo 대한치주과학회 1997 Journal of Periodontal & Implant Science Vol.27 No.4

It was reported that low dose doxycycline(LDD) regimen could inhibit pathologically elevated collagenase activity in the gingival crevicular fluid of petients with adult periodontitis without producing typical antibiotic side effects. The purpose of this study was to evaluate the effects of LDD regimen(20mg) administered during non-surgical therapy on clinical index and gingival crevicular fluid enzyme activity in diabetics who are at high risk for periodontal disease. Forty-nine subjects having at least two sites with probing pocket depths greater than 4mm were selected. In this double-blind, placebo-controlled study, the patients were administered 20 mg doxycycline capsule or placebo capsule b.i.d. for 2 weeks. Clinical parameters of dental plaque, gingival inflammation, probing pocket depth and probing attachment level were assessed at week 0, 2, 4, and 8. Gingival crevicular fluid samples were collected at the same time to evaluate the activities of collagenase and elastase. Clinical parameters and elastase activity were significantly reduced in all groups compared to the baseline value after treatment. Significantly greater reduction in pocket depth and gain in attachment level was shown in the LDD-administered group compared to placebo group in both adult periodontitis and diabetic patients. Total collagenase activity was also reduced significantly in all groups after treatment, but the greater reduction was seen in the LDD-administered diabetics group compared to relevant placebo group(at 4, 8week). Significantly greater reduction in active collagenase activity was also seen in the LDD-administered group compared to placebo group in diabetic patients(at 2, 4, 8week). These results indicated that use of low dose doxycycline could be aueseful adjunct to instrumentation therapy in the management of diabetic patient with periodontitis as well as adult periodontitis patient.

PLA/PGA 차폐막과 실크 피브로인 차폐막을 이용한 발치와의 골유도재생술의 비교연구

황우진,정성념,김윤상,피성희,유형근,정종평,신형식,Hwang, Woo-Jin,Jeong, Seong-Nyum,Kim, Yun-Sang,Pi, Sung-Hee,You, Hyung-Keun,Chung, Chong-Pyoung,Shin, Hyung-Shik 대한치주과학회 2009 Journal of Periodontal & Implant Science Vol.39 No.2

Purpose: This study was designed to compare the bond regeneratiom effects of treatment using silk fibroin membrane ( Nanogide-S$^{(R)}$ ) resorbable barrier with control group treated by polyactic acid / polylacticglycolic acid membrane(Biomesh$^{(R)}$ ) Methods: 44 severe bone loss on extraction socket from 44 patients were used in this study. In experimental group 22 sites of them were treated by silk fibrin membrane as and the other 22 sites were treated by polyactic acid/ polylacticglycolic acid membrane as a control group. Clinical parameters including recovered bone width, length and radiographic parameter of vertical length were evlauated at base line and 3 months after surgery. Results: 1) Severe bone width, length was significantlly decreased in two group. 2) Bone width, length was significantlly decreased in two group. 3) Decreased bone width, length and radiographic examination differences between group. Conclusions: On the basis of these results, silk fibrin resorbable membrane has similar bone regeneration ability to polyactic acid / polylacticglycolic acid membrane in guided bone regeneration for severe bone loss defect on extraction socket.

토끼 두개골 결손부의 골재생에 대한 poly(lactide-co-glycolide) (PLGA) 의 영향

박재영,황우진,정성념,김윤상,피성희,유형근,신형식,Park, Jae-Young,Hwang, Woo-Jin,Jeong, Seong-Nyum,Kim, Yun-Sang,Pi, Sung-Hee,You, Hyung-Keun,Shin, Hyung-Shik 대한치주과학회 2009 Journal of Periodontal & Implant Science Vol.39 No.2

Purpose: The purpose of this study is to histologically and histomorphometrically evaluate the effect of PLGA on bone regeneration compared with bone graft material. Methods: The experimental study was conducted in 10 rabbits with 2 different healing periods of 2 and 4 weeks. Following surgical exposure of the calvarium, 4 circular bone defects with a diameter of 4.6mm were formed. Rabbits were divided into control group, test groups I, and II. 10 defects assigned to the test group Ⅰ were grafted with Nu-oss and other 10 defects assigned to the test group II were grafted with PLGA. The rest of the defects were in the negative control group. At 2nd and 4th week after surgery, 10 rabbits were sacrificed through intracardiac perfusion and then specimens were obtained. Histological analysis was performed following staining with trichorme and transversal sectioning of the calvarial bone. Results: A group which used PLGA showed tissue reactions characterized by severe inflammation, rather than distinctive new bone formation. Conclusions: The present experimental investigations have failed to prove any beneficial effects of PLGA. PLGA used in this study exhibited foreign body reactions and a less favorable pattern of new bone formation in comparison to control group. Conclusion: PLGA did not function as scaffold. Further investigations of many types of micro PLGA that could improve its potential in GBR procedures are needed.

한국인 급진성 치주염 환자의 치아상실 및 부착상실 평가에 관한 연구

정영미 ( Young Mi Chung ),정성념 ( Seong Nyum Jeong ) 조선대학교 치의학연구원 2013 Oral Biology Research (Oral Biol Res) Vol.37 No.1

The aim of this study was to assess the prevalence of aggressive periodontitis as well as tooth loss and periodontal attachment loss in subjects who visited the Department of Periodontology of Wonkwang University Daejeon Dental Hospital. Materials and Methods: A total of 3,284 patients with periodontitis from January 2010 to June 2012 were included in this study. We investigated prevalence of periodontitis, age, gender, and clinical parameters (probing depth, gingival recession, tooth loss, periodontal attachment loss), and radiographic examination was performed at the baseline. Results: Sixty-six (2.01%) patients showed clinical features of aggressive periodontitis. Periodontal attachment loss of the maxillary first molar was 0.85 mm, which was the highest. The average number of missing teeth was 1.35 per subject. Tooth mortality was the highest at the maxillary first molar and at the mandibular second molar. Conclusion: Within the limitations of this study, periodontal breakdown as evaluated by attachment loss was the most severe at the first molars of aggressive periodontitis patients. It is important to recognize clinical features of aggressive periodontitis for proper diagnosis and determination of treatment timing. Further studies are needed to obtain more precise epidemiologic information, including the prevalence of aggressive periodontitis in Koreans, and investigate the potential roles of risk factors and contributory factors, such as root abnormality, occlusion, family aggregation, gene polymorphism, and Herpes virus infections.

Splint 및 비외과적 치주치료를 통하여 치주질환에 이환된 치아의 안정화 증례 보고

김연태(Yeon-Tae Kim),박예솔(Ye-Sol Park),김도형(Do-Hyung Kim),정성념(Seong-Nyum Jeong),이재홍(Jae-Hong Lee) 대한턱관절교합학회 2018 구강회복응용과학지 Vol.34 No.4

법랑돌기 제거 후의 지각과민증 및 임상효과에 대한 연구

조찬명 ( Chan Myung Cho ),임규형 ( Kyu Hyung Lim ),정성념 ( Seong Nyum Jeong ) 조선대학교 치의학연구원 2014 Oral Biology Research (Oral Biol Res) Vol.38 No.1

Purpose: The aim of this study was to evaluate dentin sensitivity and clinical effects following removal of cervical enamel projections from human teeth using three rotating instruments. Matherials and Methods: In this study, 15 of 20 total molar teeth with furcation lesions were classified using the instruments, and each group contained five sites. Each site was treated with periodontal flap surgery, and cervicial enamel projections were removed using a piezoelectric ultrasonic scaler, periodontal bur, and diamond bur. Five sites without cervical enamel projections set the control group. Patients` dentin sensitivity to compressed air was examined based on a visual analogue scale before and 1, 4, 8, 12 weeks after periodontal flap surgery. Probing depth, gingival recession, and attachment level were evaluated at 12 weeks after surgery. Results: In all groups, probing depth reduction and attachment gain were significantly detected at 12 weeks after surgery (p<0.05), and there was no significant difference in cervical enamel projection removal methods (p>0.05). Attachment gain was greater in the periodontal bur group compared to the group without cervical enamel projections (p<0.05). In all groups, there was no significant difference in patients` dentin sensitivity to compressed air at all until 12 weeks after surgery (p>0.05). There were no statistically significant differences among the four groups regarding patients` dentin sensitivity to the compressed air. Conclusion: Removal of cervical enamel projections did not increase patients` dentin sensitivity to compressed air.

Management of peri-implantitis associated with tear-like implant fracture: case reports

Yeon-Tae Kim(김연태),Jae-Hong Lee(이재홍),Seong-Nyum Jeong(정성념) 대한턱관절교합학회 2020 구강회복응용과학지 Vol.36 No.2