• Title/Summary/Keyword: 골 스캔

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Complete mouth rehabilitation, using jaw motion tracking and double scan technique in a patient with osteoarthrosis: a case report (골관절증 환자에서 하악 운동 추적 장치와 이중 스캔 기법을 활용한 완전 구강 회복 증례)

  • Seo-Kyung Jeong;Jai-Young Koak;Seong-Joo Heo;Seong-Kyun Kim;Ji-Man Park
    • The Journal of Korean Academy of Prosthodontics
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    • v.62 no.1
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    • pp.82-94
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    • 2024

  • This is a case report of complete mouth rehabilitation in a patient with generalized attrition and loss of posterior support. After analyzing the condition of the temporomandibular joint, multiple implants were placed to restore collapsed occlusion. Fixture/abutment level intraoral scanning was done instead of using conventional impression materials which entail multiple bite registration for cross-mounting. A 'jaw motion tracking'device, 'digital face-bow transfer', and 'double scan technique' which enables duplicating temporary restoration to definitive restoration were used to fabricate definitive prostheses. By using various digital techniques, complete mouth rehabilitation was done with minimal chair time in a patient with unstable occlusion.

  • https://doi.org/10.4047/jkap.2024.62.1.82 인용 PDF

Bone Mineral Density Measurement of Rats Using Dual-energy X-ray Absorptiometry: Precision of In Vivo Measurements for Various Skeletal Sites with or without Repositioning (쥐에서 이중에너지 방사선 흡수법을 이용한 골밀도의 측정: 다양한 골부위에서 재위치 여부에 따른 생체내 측정의 정밀도)

  • Oh, Dong-Hyun;Jung, Jae-Ho;Woo, Sang-Keun;Cheon, Gi-Jeong;Kim, Byung-Il;Choi, Chang-Woon;Lim, Sang-Moo
    • Nuclear Medicine and Molecular Imaging
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    • v.43 no.1
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    • pp.72-78
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    • 2009

  • Purpose: Bone mineral density (BMD) measurements need to be precise enough to be capable of detecting small changes in bone mass of rats. Using a regular dual-energy X-ray absorptiometry (DXA), we measured many BMD of various skeletal sites in rats to examine precision of DXA in relation to the repositioning on the bones of rats. Materials and Methods: Using DXA and small animal software, scans were performed 4 times in all 12 male rats without repositioning (Group 1a). Another four scans for 6 of 12 rats were done with repositioning between scans (Group 2). Customized regions of interest (ROIs), encapsulate the right hind limb, L1-4, skull and pelvic bones were drawn at each measurement. The precision of the measurements was evaluated by measuring the coefficient of variation (CV) of four measurements of BMD at each skeletal site of all rats with or without repositioning. Significance of differences between group 1b (six rats out of group 1a, which were come under group 2) and group2 were evaluated with Wilcoxon Signed Rank Sum Test. Results: CVs obtained at different skeletal sites of all measurements in Group 1b and 2. It was $3.51{\pm}1.20$, $ 2.62{\pm}1.20$ for the hindlimb (p=0.173), $3.83{\pm}2.02$, $4.59{\pm}2.02$ for L1-4 (p=0.600), $3.73{\pm}1.87$, $1.53{\pm}0.89$ for skull (p=0.046), and $2.92{\pm}0.60$, $1.45{\pm}0.60$ for pelvic bones (p=0.075). Conclusion: Our study demonstrates that the DXA technique has the precision necessary when used to assess BMD for various skeletal sites in rats regardless of repositioning.

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