• Journal of Periodontal and Implant Science
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• 제36권2호
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• pp.567-577
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• 2006

Background Several bone grafting materials have been used in sinus augmentation procedures. Macroporous Biphasic Calcium Phosphate($MBCP^{TM}$) consists of the mixture of 60% HA and 40% ${\beta}-TCP$. Therefore, it can provide good scaffold for the new bone to grow owing to HA, in the other hand, it can have bioactivity for bone remodeling owing to ${\beta}-TCP$. The purpose of this study was to evaluate bone formation following maxillary sinus augmentation using $MBCP^{TM}$ by means of histologic analysis. Material and Method $MBCP^{TM}$ was placed as a primary bone substitute for maxillary sinus augmentation. Three patients were selected after evalaution of their medical dental examination. $MBCP^{TM}$ only, $MBCP^{TM}$ combined with Irradicated cancellous bone and $MBCP^{TM}$ combined with autogenous bone were used for each patient. After about eight months, bone biopsies were harvested for histologic evaluation and fixtures installed. Results Eight months after surgery we observed new vital bone surrounding $MBCP^{TM}$ particle and the amount of new bone was about 30% even though there were discrepancies between specimens. This case report documents that $MBCP^{TM}$ when used as a grafting material for sinus floor augmentation whether combined other bone graft material or not, may lead to the predictable results for dental implants on posterior maxillary area with insufficient vertical height for fixture installation.

• Journal of Periodontal and Implant Science
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• 제42권2호
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• pp.45-49
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• 2012

Purpose: The aim of the present clinical trial was to compare pain during injection of anterior middle superior alveolar (AMSA) technique with that of infiltration injection technique in the maxilla in periodontal flap surgeries of patients referring to the Department of Periodontics, Faculty of Dentistry, Tabriz University of Medical Sciences. Methods: Twenty subjects with an age range of 20 to 40 years were selected for the present study. One side of the maxilla was randomly selected as the test side and the other as the control side using a flip of a coin. AMSA technique was used on the test side and infiltration technique was used on the control side for anesthesia. On both sides 2% lidocaine containing 1:80,000 epinephrine was used for anesthesia. The operator obtained the visual analogue scale for each patient immediately after the injection and immediately after surgery. Data was analyzed using descriptive statistical methods (frequency percentages, means and standard deviations) and Wilcoxon's test using SPSS ver. 13 (SPSS Inc.). Statistical significance was defined at P<0.05. Results: There were no statistically significant differences in pain during injection between the two techniques (P=0.856). There were statistically significant differences in postoperative pain between the two injection techniques (P=0.024). Conclusions: Postoperative pain in AMSA injection technique was less than that in the infiltration technique. Therefore, the AMSA technique is preferable in the periodontal surgeries for the anesthesia of palatal tissues given the fact that it has other advantages, too.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제18권3호
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• pp.448-453
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• 1996

This is case report of florid osseous dysplasia occurred in the entire maxilla and mandible of 47-year-old female. Florid osseous dysplasia is an expansile, exuberant asymptomatic form of benign fibro-osseous disease of the periodontal ligament, often associated with jaw cysts and to be though as an abnormal reaction of bone to irritation or stimulation. The treatment was performed with removal of the necrotic bone, bone curretage and hyperbaric oxygen therapy. The patient did not well postoperatively and has shown sign of persistant infection with pus discharge.

• 대한치과의사협회지
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• 제47권10호
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• pp.669-676
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• 2009

Purpose : Anterior region is crucial area for esthetic implant restoration. However, the alveolar process undergoes atrophy after removal of teeth and creates unfavorable situation for implant installation. The knowledge of the thickness of alveolar bone is required to estimate and expect the bone resorption after extraction. The aim of this study is to measure facial, palatal and faciopalatal bone thickness on maxillary anterior teeth. Methods : Facial, palatal, and faciopalatal bone thickness were measured on the computed tomography (CT) images from 57 patients, using an image analyzer program (Ondemand$3D^{(R)}$, Cybermed, Seoul, Korea). Results : The thickness of facial bone in incisors, lateral incisors and canines were less than 1 mm. The thickness of facial bone increased from anterior to posterior region and the thickness of palatal bone increased from posterior to anterior region. Conclusion : The measurement can be used for planning implant surgery before extraction. CT has are clinically useful in the evaluation of thickness of alveolar bone.

• Journal of Periodontal and Implant Science
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• 제40권1호
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• pp.3-10
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• 2010

Purpose: Periodontal regenerative therapies for defects created by severe periodontitis are mainly focused on bone regeneration. Although cementum regeneration needs to be better understood, it is believed to play an important role in periodontal regeneration. The first step toward a full understanding of cementum regeneration is to compare repaired cementum to pristine cementum. This study, which used histological techniques, was designed to focus on cementum regeneration and to compare pristine cementum to repaired cementum after surgical procedures with 8 and 24 week healing periods in a canine model. Methods: Buccal and lingual mucoperiosteal flaps of 10 beagle dogs were surgically reflected to create critical-sized defects. Intrabony one-wall defects, of which dimension is 4 mm width and 5 mm depth, were made at the distal aspect of mandibular second premolars and the mesial aspect of mandibular fourth premolars in the right and left jaw quadrants. Animals were sacrificed after 8 and 24 weeks post-surgery for histological specimen preparation and histometric analysis. Results: The repaired cementum was composed mostly of acellular cementum and cellular mixed fiber cementum and was thicker in the apical area than in the coronal area. The acellular cementum of the supracrestal area appeared to be amorphous. The newly formed cellular cementum was partially detached from the underlying circumpulpal dentin, which implied a weak attachment between new cementum and dentin, and this split was observed to a lesser extent in the 24 week group than in the 8 week group. The vertical height of the repaired cementum was greater in the 24 week group than in the 8 week group. Conclusions: Within the limitations of this study, we can conclude that repaired cementum after root planing was mainly acellular cementum and cementum tissue that matured to a shape similar to pristine cementum as the healing progressed from 8 to 24 weeks.

• Journal of Periodontal and Implant Science
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• 제39권sup2호
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• pp.213-222
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• 2009

Purpose: Recently, interest in chitosan has increased due to its excellent biological properties such as biocompatibility, antibacterial effect, and rapid healing capacity. On the other hand, hydroxyapatite is used as a bone substitute in the fields of orthopedics and dentistry. The hydroxyapatite-chitosan (HA-CS) complex containing hydroxyapatite nanoparticles was developed for synergy of both biomaterials. The objective of this study was to evaluate the effect of hydroxyapatite (HA)-chitosan (CS) membrane on bone regeneration in the rat calvarial defect. Methods: Eight-millimeter critical-sized calvarial defects were created in 70 male Sprague-Dawley rats. The animals were divided into 7 groups of 10 animals and received either 1) chitosan (CS) 100% membrane, 2) hydroxyapatite (HA) 30%/CS 70% membrane, 3) HA 30%/CS 70%, pressed membrane, 4) HA 40%/CS 60% membrane, 5) HA 50%/CS 50% membrane, 6) HA 50%/CS 50%, pressed membrane, or 7) a sham . surgery control. The amount of newly formed bone from the surface of the rat calvarial defects was measured using histomorphometry, following 2- or 8- week healing intervals. Results: Surgical implantation of the HA - CS membrane resulted in enhanced local bone formation at both 2 and 8 weeks compared to the control group. The HA - CS membrane would be significantly more effective than the chitosan membrane in early bone formation. Conclusions: Concerning the advantages of biomaterials, the HA-CS membrane would be an effective biomaterial for regeneration of periodontal bone. Further studies will be required to improve the mechanical properties to develop a more rigid scaffold for the HA-CS membrane.

• 대한치과의사협회지
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• 제47권9호
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• pp.596-606
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• 2009

Aim : The ultimate goal of periodontal treatment is regeneration of periodontium that have been lost due to inflammatory periodontal disease. Recently, Silicon contained Coralline Hydroxyapatite and Beta Tricalcium Phosphate bone substitute have been introduced to achieve periodontal regeneration. The purpose of this study is to evaluate the effect of the Silicon contained Coralline Hydroxyapatite and Beta Tricalcium Phosphate(BoneMedik-$DM^{(R)}$, Meta Biomed Co., Ltd. Oksan, Korea) on periodontal intrabony defects. Methods and materials : Clinical effects of Silicon contained Coralline Hydroxyapatite and Beta Tricalcium Phosphate implantation in intrabony defects were evaluated 6 months after surgery in Sixty-one intrabony defects from Fourty-six patients with chronic periodontitis. Twenty-nine experimental defects in twenty-five patients received the Silicon contained Coralline Hydroxyapatite and Beta Tricalcium Phosphate(test group), while Thirty-Three defects in twenty-one patients were treated with flap procedure only( control group). Comparative observation were done for preoperative and postoperative differences between control and experimental clinical parameters,-clinical attachment 10ss(CAL), probing depth(PD), bone probing depth(BPD), gingi val recession. Results : Postoperative improvements in CAL, PD, BPD were observed in both test and control groups(P<0.0l). However, the improvements in CAL, PD, BPD of the test group were significantly greater than control group. Conclusion : Healing of the both groups were uneventful during experimental periods. Use of Silicon contained Coralline Hydroxyapatite and Beta Tricalcium Phosphate in a flap operation resulted in significantly greater improvements in CAL, PD, and BPD over flap operation alone. Silicon contained Coralline Hydroxyapatite and Beta Tricalcium Phosphate will be good bone substitute materials for treatment of intrabony defects.

• Journal of Korean Dental Science
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• 제15권2호
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• pp.162-165
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• 2022

Burkitt lymphoma is a highly aggressive type of hematopoietic malignancy that is comparatively common in children and young people. It is important that Burkitt lymphoma be diagnosed as early as possible for prompt intervention due to its rapidly progressive, high-grade malignant nature. Dentists, especially maxillofacial surgeons, can play a life-saving role in patients with such unknown malignancy as the first clinical or radiological manifestation might occur in the oral region.

• 구강회복응용과학지
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• 제40권2호
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• pp.46-54
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• 2024

목적: 투석을 받고 있으며 신장 이식 수술 전 구내 평가를 위해 의뢰된 말기 신장 질환자의 치주 상태를 신장 기능이 정상인 대상자들과 비교 평가하고자 함이다. 연구 재료 및 방법: 말기 신장 질환으로 투석을 받고 있으면서 신장 이식 수술 전 구강내 평가를 위해 대학병원 신장 내과에서 치과진료센터로 의뢰된 환자들을 대상으로 하였다. 치주 상태의 비교를 위해 신장 기능에 이상이 없으면서, 나이와 성별이 부합하는 대상자를 추출하여 건강한 대조군으로 선정하였다. 신장내과 진료 기록을 통해 환자의 연령, 성별, 동반질병, 받고 있는 투석의 종류, 투석 기간을 조사하였으며, 치주과 진료 기록을 통해 치주 상태에 대한 자료를 분석하였다. 결과: 투석을 받는 환자 51명 및 건강한 대조군에 속한 51명을 합하여 모두 102명이 본 연구에 포함되었다. 신장 이식 수술을 받기 전까지 투석을 받은 말기 신장 질환자들에서 건강한 대상자들에 비해 치주낭 깊이, 임상적 부착수준, 치주낭 깊이가 5 mm 이상 되는 부위의 백분율, 임상적 부착수준이 4 mm 이상 되는 부위의 백분율, 탐침시 출혈이 일어나는 치아의 백분율, 상실치 수 등이 유의하게 크게 나타났다. 또한 투석을 받는 환자 그룹에서 중등도에서 중도 치주염을 지닌 비율이 건강한 대조군에 비해 더 높은 것으로 나타났다. 결론: 본 연구에서 투석을 받고 있으며 신장 이식 수술 전 구강내 평가를 위해 의뢰된 말기 신장 질환자의 치주 상태는 연령과 성별이 유사한 건강한 대조군에 속한 대상자들에 비해 악화된 상태였다.

• 대한치주과학회:학술대회논문집
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• 대한치주과학회 2003년도 제43회 종합학술대회 연제초록
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• pp.65-65
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• 2003