• Journal of Periodontal and Implant Science
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• 제24권3호
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• pp.649-660
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• 1994

The purpose of this study was to evaluate the effects of administration of Zea Mays L. on the healing process after periodontal surgery as adjuntives. Authors used 3 kinds of different clinical criteria, depth of periodontal pocket by using the Goldman Fox periodontal probe, degree, of tooth mobility by Periotest, and amount of occlusal force with electronic device. In this comparative clinical study, 30 patients who were divided into two group, 15 ZML administrated group and 15 placebo adminstrated group, were participated. All the examined teeth were isolated with gauze and air spray, and measured each clinical critera on the day of before surgery, 1, 2, 4, 8 weeks after surgery. The results were as follows. 1. The changes of the periodontal pocket depth, on the both of Zea Mays L. administrated group and placebo adminstrated group, revealed the decreasing tendency, and it was shown the time dependent tendency. But there was no statistically significant differences between the two group. 2. In the case of tooth mobility, both group showed the highest severe mobility on the 1 week after surgery. It was observed that experimental group had more effects on decreasing the mobility. But there was no statistically significant differences between the two group. 3. In the case of experimental group, the recovery trend of occlusal forces after periodontal surgery on the molar teeth revealed higher than the control group. But there was no statistically significant differences between the two group. In conclusion, Zea Mays L. may play a favorable role in the healing process after periodontal surgery. It was suggested that further study to evaluate the effects of selective administration on the patient who have systemic diseases should be needed.

• 대한치과보철학회지
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• 제54권4호
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• pp.431-437
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• 2016

광범위한 보철 수복에서 교합접촉의 재설정이 필요한 경우가 많이 있으며, 교합접촉은 보철물 성공의 필수요소이다. 만약 교합접촉 관계가 잘못 부여된다면 다양한 교합외상의 증상이 발생할 수 있으며, 악관절 장애도 그 중 하나이다. 이런 악관절 장애의 흔한 증상의 하나로 저작근 장애 및 악관절 부위 통증이 발생될 수 있으며 이는 환자에게 많은 고통을 준다. 본 증례는 보철물의 잘못된 교합접촉으로 인한 지속적 악관절 통증을 가진 환자에서 교합 재설정한 보철물로 재수복하여 저작근 및 악관절 통증이 개선되는 등의 만족스러운 결과를 얻어 이를 보고하는 바이다.

• Structural Engineering and Mechanics
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• 제57권4호
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• pp.717-731
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• 2016

In orthopedic surgery and more especially in total arthroplastie of hip, the fixing of the implants generally takes place essentially by means of constituted surgical polymer cement. The damage of this materiel led to the fatal rupture and thus loosening of the prosthesis in total hip, the effect of over loading as the case of tripping of the patient during walking is one of the parameters that led to the damage of this binder. From this phenomenon we supposed that a remain of bone is included in the cement implantation. The object of this work is to study the effect of this bony inclusion in the zones where the outside conditions (loads and geometric shapes) can provoke the fracture of the cement and therefore the aseptic lousing of the prosthesis. In this study it was assumed the presence of two bones -type inclusions in this material, one after we analyzed the effect of interaction between these two inclusions damage of damage to this material. One have modeled the damage in the cement around this bone inclusion and estimate the crack length from the damaged cement zone in the acetabulum using the finite element method, for every position of the implant under the extreme effort undergone by the prosthesis. We noted that the most intense stress position is around the sharp corner of the bone fragment and the higher level of damage leads directly the fracture of the total prosthesis of the hip.

• Journal of Periodontal and Implant Science
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• 제26권1호
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• pp.103-116
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• 1996

This study was performed to observe the bacterial adhesion and penetration to e-PTFE membrane following guided tissue regeneration(GTR) procedure and to evaluate the association of the membrane exposure and bacterial contamination with the clinical outcome. For the study, ten infrabony defects in 9 patient were treated by mucoperiosteal flap operation including placement of the e-PTFE membrane. The treated teeth were monitored weekly for the membrane exposure, gingival recession and gingival inflammation. The membranes were retrieved after 4 to 6 weeks, examined by SEM for bacterial contamination and adherent connective tisue elements, and observed under LM for the bacterial penetration into membrane. Three months postsurgery, the defect sites were clinically reexamined for the changes in attachment level and probing depth. Comparison of the ultrastuctural findings and clinical outcome revealed that extent of membrane exposure and bacterial contamination of the membrane was inversely associated with clinical attachment gain. From this finding, the extent of membrane exposure and the bacterial contamination on the apical portion of the e-PTFE membrane at the time of removal seemed to be a critical determinant on the clinical outcome of GTR and the membrane exposure needs to be controlled for optimal results.

• Journal of Periodontal and Implant Science
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• 제26권1호
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• pp.117-132
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• 1996

The purpose of this study was to evaluate the bacterial adherence on e-PTFE membrane immersed in whole saliva from subjects with different periodontal status. Experiment involved 3 subject groups: 5 persons with healthy periodontium(probing depth below 3mm and no signs of gingival inflammation including bleeding on probing), 10 patients with gingivitis(probing depth below 3mm and apparent signs of gingival inflammation), and 10 patients with advanced periodontitis(probing depth over 7mm and apparent signs of gingival inflammation). Each disease group was included before and after scaling and root planing treatment. After obtaining whole saliva from each subject, e-PTFE membrane(Gore-Tex periodontal membrane : $GTPM^{(R)}$, W.L. Gore & Associates, Flagstaff, USA) specimens were immersed at room temperature in the saliva aliqouts for 1, 3, 7 days. The weight between pre - and post - immersion in saliva was measured with the analytical balance and the difference was recorded. The specimens were processed for SEM observation. The bacterial adherence on the membrane specimens was evaluated using the scanning electron microscope images. The obtained results were as follows : 1. There was no difference in the weight of bacteria adherent to e-PTFE membrane specimens according to the periodontal status and the immersion periods. 2. As the exposure time to saliva increased, the bacterial adherence to the membrane specimen significantly increased in all groups(P<0.005). 3. As the severity of periodontal disease increased, the bacterial adherence to the membrane specimens significantly increased(p<0.001). 4. After scaling and root planing, the bacterial adherence to the membrane specimens significantly decreased in gingivitis and periodontitis patient group(P<0.001). These results suggest that bacterial contamination on exposed barrier membrane surface be reduced through improvement of periodontal status and oral health environment before and after GTR procedure for the successful outcome.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제11권2호
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• pp.40-46
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• 1989

출생 전${\cdot}$후 악관절의 외상 또는 감염은 과두 성장을 방해하며 편측으로 발생하는 경우 하악골의 비대칭 성장을 초래하여 심한 안모 변형과 부정교합을 유발하거나 악관절 유착의 주된 원인이 된다. 역사적으로 관절 유착은 과두절단술에서부터 연골이식, 진피이식, 금속과두 이식, 관절 성형술, 관절과 이식물 삽입에 이르기까지 매우 다양한 방법에 의해 치료되어 왔으며 하악운동이 보장되고 정상적인 기능을 회복하는데는 어떤 술식이라도 만족스런 결과를 가져다줄 수 있다. 이에 저자는 편측성 악관절 강직증 및 비대칭 안모를 가진 환자에서 과두절제술 후 금속 과두이식을 이용한 악관절 재건과 하악 골체부 절단술 및 C-sliding 절단술, 하악지 수직 골절단술, Medpor를 이용한 증식술로 개구기능과 비대칭 안모를 개선하여 비교적 만족할 만한 결과를 얻었기에 그 치험례를 보고하는 바이다.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제37권
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• pp.3.1-3.7
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• 2015

Hemifacial microsomia (HFM) is the most common craniofacial anomaly after cleft lip and cleft palate; this deformity primarily involves the facial skeleton and ear, with either underdevelopment or absence of both components. In patients with HFM, the management of the asymmetries requires a series of treatment phases that focus on their interception and correction, such as distraction osteogenesis or functional appliance treatment during growth and presurgical orthodontic treatment followed by mandibular and maxillary surgery. Satisfactory results were obtained in a 9-year-old girl with HFM who was treated with distraction osteogenesis. At the age of 19, genioplasty and mandible body augmentation with a porous polyethylene implant (PPE, $Medpor^{(R)}$, Porex) was sequentially performed for the functional and esthetic reconstruction of the face. We report a case of HFM with a review of the literature.

• 대한치과교정학회지
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• 제39권6호
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• pp.402-419
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• 2009

성장이 종료된 치성 또는 골격성 개방교합 환자를 치료하는 것은 매우 어려운 일이다. 전치부 개방교합 환자는 증가된 전안면고경, 상악 구치부의 과도한 수직성장, 큰 하악각 등의 특징을 지닌다. 이러한 증례에서 구치의 압하를 통한 개방교합의 해소는 좋은 치료전략이다. 본 연구는 교정용 미니임플란트를 이용하여 개방교합을 치료하고 성공적인 유지를 얻은 두 명의 환자에 대한 보고이다. 적절한 진단이 시행되고 교정용 미니임플란트 등의 장치를 이용한 치료기법을 적용하면 수술치료 없이 교정치료만으로 개방교합의 치료가 가능하며, 하악구치부에 posterior bite block을 추가한 가철식 유지장치 및 SFR이 개교환자를 위한 유지장치 또는 보조유지장치로 유용하게 사용될 수 있다는 결론을 얻었다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제41권2호
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• pp.74-77
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• 2015

Objectives: Transpositioning of the inferior alveolar nerve to prevent injury in lower jaw has been advocated for orthognathic, pre-prosthetic and for implant placement procedures. However, the concept of infra-orbital nerve repositioning in cases of mid-face fractures remains unexplored. The infraorbital nerve may be involved in trauma to the zygomatic complex which often results in sensory disturbance of the area innervated by it. Ten patients with infraorbital nerve entrapment were treated in similar way at our maxillofacial surgery centre. Materials and Methods: In this article we are reporting three cases of zygomatico-maxillary complex fracture in which intra-operative repositioning of infra-orbital nerve into the orbital floor was done. This was done to release the nerve from fractured segments and to reduce the postoperative neural complications, to gain better access to fracture site and ease in plate fixation. This procedure also decompresses the nerve which releases it off the soft tissue entrapment caused due to trauma and the organized clot at the fractured site. Results: There was no evidence of sensory disturbance during their three month follow-up in any of the patient. Conclusion: Infraorbital nerve transposition is very effective in preventing paresthesia in patients which fracture line involving the infraorbital nerve.

• Journal of Periodontal and Implant Science
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• 제29권4호
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• pp.963-979
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• 1999

This study examined ribotypes of 36 P. gingivalis strains isolated from 10 rapidly progressive periodontitis patients in Korean and revealed the presence of genetic heterogeneity among the patients. Ribotyping was performed by using a oligonucleotide probes based on 16S rRNA after whole genomic DNA had been digested with the restriction endonuclease enzyme Kpn I and Pst I. In addition, the antigenic heterogeneity of fimbrillin and protease activity was analysed to observe the virulency of P. gingivalis. The results were as follows. 1. Using KpnI, 6 ribotypes were detected, whereas 7 ribotypes were identified by using PstI. When combined two enzymes, a total of 8 ribotypes was subgrouped. 2. Ribotype I/e was the most common and detected in 4 among 10 patients. 3. The fimbrillin expressed from P. gingivalis isolates had the molecular size of 41kDa, 43kDa, 49kDa. It was observed that the size of fimbrillin with the same ribotypes could be identical. 4. All the P. gingivalis strains showed strong proteolytic activity and had the molecular size more than 120kDa. In summary, total 8 ribotypes were observed for isolates from rapidly progressive periodontitis patients. Forty percent of the patients harbored isolates exhibiting the same ribotype I/e, and it was observed that more than one ribotype can coexist in an individual patient.