• 제목/요약/키워드: Research of Dentistry

검색결과 4,631건 처리시간 0.041초

A prospective multicenter clinical study on the efficiency of detachable ball- and spring-retained implant prosthesis

  • Min-Jung Kim;Won-Tak Cho;Su-Hyun Hwang;Ji-Hyeon Bae;Eun-Bin Bae;June-Sung Shim;Jong-Eun Kim;Chang-Mo Jeong;Jung-Bo Huh
    • The Journal of Advanced Prosthodontics
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    • 제15권4호
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    • pp.202-213
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    • 2023
  • PURPOSE. This prospective clinical study was conducted to evaluate the clinical usefulness of the freely detachable zirconia ball- and spring-retained implant prosthesis (BSRP) through a comparative analysis of screw- and cement-retained implant prosthesis (SCRP). MATERIALS AND METHODS. A multi-center, randomized, prospective clinical study evaluating the clinical usefulness of the detachable zirconia ball- and spring-retained implant prostheses was conducted. Sixty-four implant prostheses in 64 patients were examined. Periodic observational studies were conducted at 0, 3, 6, and 12 months after delivery of the implant prosthesis. Factors such as implant success rate, marginal bone resorption, periodontal pocket depth, plaque and bleeding index, and prosthetic complications were evaluated, respectively. RESULTS. During the 1-year observation period, all implants survived without functional problems and clinical mobility, showing a 100% implant success rate. Marginal bone resorption was significantly higher in the SCRP group than in the BSRP group only at the time of implant prosthesis delivery (P = .043). In all observation periods, periodontal pocket depth was slightly higher in the BSRP group than in the SCRP group, but there was no significant difference (P > .05). The modified plaque index (mPI) scores of both groups were moderate. Higher ratio of a score 2 in modified sulcus bleeding index (mBI) was observed in the BSRP group in the 6- and 12-months observation. CONCLUSION. Within the limitations of this study, the newly developed zirconia ball- and spring-retained implant prosthesis could be considered as an applicable and predictable treatment method along with the existing screw- and cement-retained prosthesis.

Wiskott-Aldrich 증후군 환아의 증례보고 (WISKOTT-ALDRICH SYNDROME WITH DENTAL PROBLEMS : CASE REPORT)

  • 이연주;현홍근;장철호;김영재;김정욱;장기택;김종철;한세현;이상훈
    • 대한소아치과학회지
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    • 제34권3호
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    • pp.468-472
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    • 2007
  • Wiskott-Aldrich 증후군은 WAS 단백질 유전자의 돌연변이에 의해서 야기되는 면역결핍질환으로 X 염색체 열성으로 유전되는 양상을 보인다. 혈소판감소증과 그로 인한 출혈경향, 면역결핍으로 인해 반복되는 감염, 아토피성 피부염등의 소견을 보인다. 첫 번째 증례는 서울대학교 치과병원 소아치과에 내원한 2세 11개월의 남아로 서울대학교 어린이병원에서 골수이식수술 전에 감염성 요소의 제거를 위해 의뢰되었다. 두 번째 증례는 2세 6개월의 남아로 구각부 및 치은의 연조직 질환과 치아 및 치은의 착색을 주소로 본과에 의뢰되었다. 이들 두 환자에서 보이는 Wiskott-Aldrich 증후군의 특징적인 치과적 소견과 치과치료시의 주의사항에 대해 보고하는 바이다.

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구개의 섬유종 : 증례보고 (FIBROMA ON THE PALATE : A CASE REPORT)

  • 김영재;장기택;한세현;김종철;이상훈;김정욱
    • 대한소아치과학회지
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    • 제30권2호
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    • pp.286-290
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    • 2003
  • 섬유종은 구강 내에서 가장 흔히 발견되는 양성 연조직 종양이다. 대개 외상과 관련된 병력이 있으며 10대와 20대에서 호발하며 외과적 절제 후 재발은 드문 것으로 보고되었다. 14세 여아가 구개에 생긴 연조직 병소의 진단과 처치를 위해 서울대학교병원 소아치과로 의뢰되었다. 병소는 지난 6개월간 점차 크기가 증가하였으며 외상병력과 구강 내 악습관은 없는 것으로 조사되었다. 임상 검사 결과 직경 3cm의 무증상인 점막의 경상 융기가 관찰되었고, 생검(biopsy) 결과 섬유종으로 진단하였다. 외과적 제거 후 4년간 재발의 징후는 보이지 않았다. 섬유종에 대한 병리학적 고찰과 감별진단, 증례의 진단과 처치에 대해 보고하는 바이다.

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단골성 섬유성이형성증 환아에서 나타난 맹출지연 (A CASE OF DELAYED ERUPTION IN A CHILD WITH MONOSTOTIC FIBROUS DYSPLASIA)

  • 민수영;이제호;김성오;최병재;최형준;김승혜;송제선
    • 대한소아치과학회지
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    • 제38권3호
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    • pp.270-275
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    • 2011
  • 섬유성이형성증은 골격 계통의 국소화된 양성 발육장애로서 해면골 내에서 섬유조직이 증식되며 불규칙한 골소주가 형성되는 질환이다. 섬유성이형성증의 두개안면부 병소는 안면동통, 두통, 두개비대칭, 안면기형, 치아이동, 부정교합, 시각이상, 청각이상 등의 증상이 나타날 수 있다. 본 증례는 섬유성이형성증으로 진단된 혼합치열기 환아로서 이환 부위에서 영구치의 맹출지연이 관찰되었다. 병소에 이환되지 않은 환아의 하악 좌측 측방 치열군은 교합위까지 맹출을 완료하였으나 병소에 이환된 하악 우측 측방 치열군은 현재 치조골 내에서 느린 속도로 맹출 중이며 치근 형성이 완료되지 않아 계속 경과 관찰 중이다. 맹출이 정지되었다고 판단될 시 상부 치조골 제거를 통한 맹출유도나 교정적 정출을 고려할 수 있을 것이다.

Dental management of patients with X-linked hypophosphatemia

  • Lee, Bin-Na;Jung, Hye-Yoon;Chang, Hoon-Sang;Hwang, Yun-Chan;Hwang, In-Nam;Oh, Won-Mann
    • Restorative Dentistry and Endodontics
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    • 제42권2호
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    • pp.146-151
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    • 2017
  • X-linked hypophosphatemia (XLH) is a hereditary metabolic disease caused by the loss of phosphate through the renal tubules into the urine, and an associated decrease in serum calcium and potassium phosphate. Its dental features include spontaneous dental abscesses that occur in the absence of trauma or dental caries. The aim of this case report was to describe the dental problems of XLH patients and to evaluate limitations in their treatment. A 14 year old male and a 38 year old female with XLH were referred to the Department of Conservative Dentistry for endodontic treatment. The dental findings were periapical abscesses without obvious trauma or caries. Conservative endodontic treatment was performed in teeth with pulp necrosis and abscess. In case 1, the treated teeth showed improvements in bone healing, without clinical symptoms. However, in case 2, the implants and the treated tooth showed hypermobility, and the final restoration was therefore postponed. Early diagnosis, periodic examinations, and communication with the patient's pediatrician are important in the dental management of patients with XLH.

The Effect of Dibucaine.HCl on the Physical Properties of Neuronal Membranes

  • Jang, Hye-Ock;Hyun, Cheol-Ho;Yoon, Jin-Hyeok;Kang, Yong-Gyu;Park, Sung-Min;Park, Young-Sik;Park, Jun-Seop;Ok, Jin-Seok;Lee, Dong-Hun;Bae, Moon-Kyung;Yun, Il
    • Journal of Photoscience
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    • 제12권2호
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    • pp.67-73
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    • 2005
  • Fluorescent probe techniques were used to evaluate the effect of dibucaine.HCl on the physical properties (transbilayer asymmetric lateral mobility, annular lipid fluidity and protein distribution) of synaptosomal plasma membrane vesicles (SPMV) isolated from bovine cerebral cortex. An experimental procedure was used based on selective quenching of 1,3-di(l-pyrenyl)propane (Py-3-Py) by trinitrophenyl groups, and radiationless energy transfer from the tryptophans of membrane proteins to Py-3-Py. Dibucaine.HCl increased the bulk lateral mobility, and annular lipid fluidity in SPMV lipid bilayers, and had a greater fluidizing effect on the inner monolayer than the outer monolayer. The magnitude of increasing effect on annular lipid fluidity in SPMV lipid bilayer induced by dibucaine.HCl was significantly far greater than magnitude of increasing effect of the drug on the lateral mobility of bulk SPMV lipid bilayer. It also caused membrane proteins to cluster. These effects of dibucaine.HCl on neuronal membranes may be responsible for some, though not all, of the local anesthetic actions of dibucaine.HCl.

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소아치과 영역에서 러버댐의 다양한 임상적 적용에 대한 증례보고 (A CASE STUDY OF VARIOUS CLINICAL APPLICATION OF THE RUBBER DAM IN PEDIATRIC DENTISTRY)

  • 이성혁;김종범;장기택;김종철
    • 대한소아치과학회지
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    • 제24권3호
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    • pp.549-555
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    • 1997
  • Usage of the rubber dam has been advocated by countless number of dentists. The advantages of the rubber dam such as the following are well-known 1. Moisture control. 2. Improved field of vision. 3. Ease of approach. 4. Soft tissue retraction and Injury prevention. 5. Prevention of aspiration of materials or instruments. 6. Shortened chair time. 7. Induction of nasal breathing during administration of $N_2O-O_2$ sedation. Recent reports indicate the rubber dam can protect the dental staffs from the infection when treating HBV or HIV positive patients. Also, improved moisture control and freeing of both hands allowed by the rubber dam makes it very useful when bonding orthodontic brackets. This case study presents the various clinical application of the rubber dam on patients visiting SNUDH dept. of pediatric dentistry to emphasize the importance of its use in pediatric dentistry.

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