3 research outputs found

    (An) experimental study of the pulp responses on the effect of base materials by remaining dentin thickness

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    ์น˜์˜ํ•™๊ณผ/๋ฐ•์‚ฌ[ํ•œ๊ธ€] ์น˜์•„๊ฒฝ์กฐ์ง ์†์ƒ์˜ ์ฒ˜์น˜์— ์žˆ์–ด์„œ ์—ฌ๋Ÿฌ ์žฌ๋ฃŒ๋“ค์ด ๋ฌผ๋ฆฌ์ , ์ƒ๋ฌผํ•™์ ์œผ๋กœ ๋งŽ์ด ๊ฐœ์„ ๋˜์–ด ์‚ฌ์šฉ๋˜๊ณ  ์žˆ์œผ๋ฉฐ ์น˜์ˆ˜์˜ ์ƒํ™œ๋ ฅ์„ ์œ ์ง€ํ•˜๊ธฐ ์œ„ํ•˜์—ฌ ์—ฌ๋Ÿฌ ๊ฐ€์ง€ ์ด์žฅ์žฌ๊ฐ€ ์‚ฌ์šฉ๋˜๊ณ  ์žˆ๋‹ค. ์ด๋Ÿฌํ•œ ์ด์žฅ์žฌ์˜ ์น˜์ˆ˜๋ฐ˜์‘์— ๋ฏธ์น˜๋Š” ์˜ํ–ฅ์„ ์—ฐ๊ตฌํ•˜๋Š”๋ฐ ์žˆ์–ด ์ž”์กด์ƒ์•„์งˆํ›„๊ฒฝ์ด ๊ณ ๋ คํ•ด์•ผํ•  ์ค‘์š”ํ•  ์ค‘์š”ํ•œ ์š”์ธ์ด ๋˜๋ฏ€๋กœ ์ด์— ์ €์ž๋Š” ์ „๊ธฐ์ €ํ•ญ์น˜๋ฅผ ์ด์šฉ ํ›„๊ฒฝ์ด 0.4 โˆผ 0.6 ใŽœ๊ตฐ (Group A) ๊ณผ 0.8 โˆผ 1.0 ใŽœ ๊ตฐ (Group B)์œผ๋กœ ์™€๋™์„ ํ˜•์„ฑํ•˜์—ฌ ์•„์—ฐํ™”์œ ์ง€๋†€ ์‹œ๋ฉ˜ํŠธ, ์ˆ˜์‚ฐํ™”์นผ์Š˜์ œ์žฌ, ์ธ์‚ฐ์•„์—ฐ ์‹œ๋ฉ˜ํŠธ, ํด๋ฆฌ์นด๋ณต์‹ค๋ ˆ์ดํŠธ ์‹œ๋ฉ˜ํŠธ์™€ ๊ธ€๋ผ์Šค์•„์ด์˜ค๋…ธ๋จธ ์‹œ๋ฉ˜ํŠธ๋ฅผ ์ด์žฅ์žฌ๋กœ ์‚ฌ์šฉํ•˜์—ฌ ์น˜์ˆ˜๋ฐ˜์‘์„ ์—ฐ๊ตฌํ•œ ๊ฒฐ๊ณผ ๋‹ค์Œ๊ณผ ๊ฐ™์€ ๊ฒฐ๊ณผ๋ฅผ ์–ป์—ˆ๋‹ค. 1. A๊ตฐ์—์„œ๋Š” ์กฐ์ƒ์•„์„ธํฌ์ธต์˜ ์œ„์ถ• ๋ฐ ์ฆ์‹์ด ์•„์—ฐํ™”์œ ์ง€๋†€ ์‹œ๋ฉ˜ํŠธ, ์ˆ˜์‚ฐํ™”์นผ์Š˜ ์ œ์žฌ, ์ธ์‚ฐ์•„์—ฐ ์‹œ๋ฉ˜ํŠธ๋ฅผ ์‚ฌ์šฉํ•œ ๊ตฐ์—์„œ ๊ด€์ฐฐ๋˜์—ˆ์œผ๋ฉฐ ํด๋ฆฌ์นด๋ณต์‹ค๋ ˆ์ดํŠธ ์‹œ๋ฉ˜ํŠธ์™€ ๊ธ€๋ผ์Šค ์•„์ด์˜ค๋…ธ๋จธ ์‹œ๋ฉ˜ํŠธ ์‚ฌ์šฉ๊ตฐ์—์„œ๋Š” ์กฐ์ƒ์•„์„ธํฌ์ธต์˜ ๋ณ€ํ™”๋Š” ์—†์—ˆ๋‹ค. 2. A๊ตฐ์—์„œ ์ƒ์•„๊ธฐ์งˆ์ธต์˜ ์ฆ๊ฐ€๋Š” ๋ชจ๋“  ์‹คํ—˜์ œ์žฌ์—์„œ ๊ณตํžˆ ๋‚˜ํƒ€๋‚ฌ๋‹ค. 3. A๊ตฐ์—์„œ ํ˜ˆ๊ด€ ์ถฉํ˜ˆ์€ ๋ชจ๋“  ์‹คํ—˜์ œ์žฌ์—์„œ ๊ณตํžˆ ๋‚˜ํƒ€๋‚ฌ์œผ๋ฉฐ ์•„์—ฐํ™”์œ ์ง€๋†€ ์‹œ๋ฉ˜ํŠธ ์‚ฌ์šฉ๊ตฐ 3์ผ์งธ ๋ฐ ์ธ์‚ฐ์•„์—ฐ ์‹œ๋ฉ˜ํŠธ ์‚ฌ์šฉ๊ตฐ 8์ฃผ์งธ์—์„œ ์—ผ์ฆ๋ฐ˜์‘์ด ๊ด€์ฐฐ๋˜์—ˆ๊ณ  ์ธ์‚ฐ ์•„์—ฐ ์‹œ๋ฉ˜ํŠธ ์‚ฌ์šฉ๊ตฐ 3์ผ์งธ์—์„œ๋Š” ์ถœํ˜ˆ ํ˜„์ƒ๋„ ๋‚˜ํƒ€๋‚ฌ๋‹ค. 4. B๊ตฐ์—์„œ๋Š” ๋ชจ๋“  ์‹คํ—˜์ œ์žฌ์—์„œ ์กฐ์ƒ์•„์„ธํฌ์ธต์˜ ๋ณ€ํ™”๋Š” ๊ด€์ฐฐ๋˜์ง€ ์•Š์•˜๋‹ค. 5. B๊ตฐ์—์„œ๋Š” ๋ชจ๋“  ์‹คํ—˜์ œ์žฌ์—์„œ ์ƒ์•„๊ธฐ์งˆ์ธต์˜ ์ฆ๊ฐ€์™€ ํ˜ˆ๊ด€ ์ถฉํ˜ˆ์ด ๊ด€์ฐฐ๋˜์—ˆ์œผ๋‚˜ ์—ผ์ฆ ๋ฐ˜์‘์€ ๋‚˜ํƒ€๋‚˜์ง€ ์•Š์•˜๋‹ค. [์˜๋ฌธ] The purpose of this study is to evaluate the pulpal responses to the base materials such as zinc oxide eugenol cement, calcium hydroxide, zinc phosphate cement, polycarboxylate cement and glass ionomer cement. The 100 caries free dog teeth were devided into 2 groups by remaining dentin thickness (Group A: 0.4-0.6 ใŽœ, Group B: 0.8-1.0 ใŽœ)and each group were devided into 5 subgroups. The intervals of observation period are 3days, 1 week, 2 weeks, 4 weeks and 8 weeks respectively after experiment. The specimens were fixed with 10% formalin and decalcifed in 5% nitric acid. All specimens were stained with Hematoxylin-Eosin and examined histopathologically. The results were as follows. 1. In group A, atropy or hyperplasia in odontoblasts were seen in zinc oxide eugenol cement, calcium hydroxide and zinc phosphate cement. No changes in odontoblasts were seen in polycarboxylate cument and glass ionomer cement. 2. In group A, increase of predentin were seen in all experimental materials. 3. In group A, vascular congestion were seen in all experimental materials and inflammation were seen on 3 days in zinc oxide eugenol cement, 8 weeke in zinc phosphate cement and hemorrage were seen on 3 days in zinc phosphate cement. 4. In group B, changes of odontoblasts were not seen all experimental materials. 5. In group B, increase of predentin and vascular congestion were seen in all experimental materials but inflammation were not seen.restrictio

    (A) study of determination of physiological root apex by electrical resistance value

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    ์น˜์˜ํ•™๊ณผ/์„์‚ฌ[ํ•œ๊ธ€] ๊ทผ๊ด€์น˜๋ฃŒ์— ์žˆ์–ด์„œ ์ƒ๋ฆฌ์  ๊ทผ์ฒจ(physiological root apex)๊นŒ์ง€ ์ •ํ™•ํ•œ ๊ทผ๊ด€๊ธธ์ด๋ฅผ ์ธก์ •ํ•˜์—ฌ ๊ทผ๊ด€์ถฉ์ „ํ•˜๋Š” ๊ฒƒ์€ ๊ทผ๊ด€์น˜๋ฃŒ์˜ ์„ฑ๊ณต์—ฌ๋ถ€๋ฅผ ๊ฒฐ์ •ํ•˜๋Š” ์ค‘์š”ํ•œ ์š”์†Œ์˜ ํ•˜๋‚˜์ด๋‹ค. ๊ทผ๊ด€๊ธธ์ด ์ธก์ •๋ฐฉ๋ฒ•์œผ๋กœ๋Š” ํ™˜์ž์˜ ์ง€๊ฐ๊ณผ ์ˆ ์ž์˜ ์ด‰๊ฐ์„ ์ด์šฉํ•œ ๋ฐฉ๋ฒ•, X-์„ ์ƒ๊ณผ ์ธก์ •์นจ, ์ž, ๊ทธ๋ฆฌ๋“œ(grid)๋“ฑ๊ณผ์˜ ๋ณ‘์šฉ๋ฒ•์ด ์†Œ๊ฐœ๋˜์—ˆ์œผ๋‚˜ ์ด๋Ÿฐ ๋ฐฉ๋ฒ•๋“ค์€ ์ƒ๋ฆฌ์  ๊ทผ์ฒจ๊นŒ์ง€์˜ ์ •ํ™•ํ•œ ๊ทผ๊ด€๊ธธ์ด ์ธก์ •์— ๊ฐ๊ฐ ์–ด๋ ค์šด ์ ์ด ์žˆ๋‹ค. ์ตœ๊ทผ์— ์ „๊ธฐ์ €ํ•ญ์น˜๋ฅผ ์ด์šฉํ•œ ๊ทผ๊ด€๊ธธ์ด ์ธก์ •์žฅ์น˜๊ฐ€ ๊ฐœ๋ฐœ๋˜์–ด ์ƒ๋ฆฌ์  ๊ทผ์ฒจ๊นŒ์ง€ ๊ทผ๊ด€๊ธธ์ด๋ฅผ ์ธก์ •ํ•˜๋Š”๋ฐ ํšจ๊ณผ์ ์ด๋ผ๊ณ  ํ‰๊ฐ€๋˜์–ด ์™”๋‹ค. ์ €์ž๋Š” ์—ฐ์„ธ๋Œ€ํ•™๊ต ์น˜๊ณผ๋Œ€ํ•™ ๋ณด์กด๊ณผ์— ๋‚ด์›ํ•œ ๊ทผ๊ด€์น˜๋ฃŒ ์ฒ˜์น˜ํ™˜์ž ์ค‘ 89๋ช…(116 ์น˜์•„, 144 ๊ทผ๊ด€)์„ ๋Œ€์ƒ์œผ๋กœ ์ „๊ธฐ์ €ํ•ญ์น˜๋ฅผ ์ด์šฉํ•œ ๊ทผ๊ด€๊ธธ์ด ์ธก์ •์žฅ์น˜์˜ ์ผ์ข…์ธ Root-Canal Meter ์™€ X-์„ ์ƒ์„ ์ด์šฉํ•˜์—ฌ ์ƒ๋ฆฌ์  ๊ทผ์ฒจ์˜ ๋ถ„ํฌ ๋ฐ ์น˜์•„๋ถ€์œ„๋ณ„ ์œ„์น˜์— ๋Œ€ํ•œ ์ธก์ •์กฐ์‚ฌ์—์„œ ๋‹ค์Œ๊ณผ ๊ฐ™์€ ๊ฒฐ๊ณผ๋ฅผ ์–ป์—ˆ๋‹ค. 1) X-์„ ์ƒ๊ทผ์ฒจ์—์„œ ยฑ 1mm ์ด๋‚ด์— ์กด์žฌํ•˜๋Š” ๊ฒƒ์ด ์กฐ์‚ฌ๋Œ€์ƒ์˜ 88.88%(128๊ทผ๊ด€) ์ด์—ˆ๋‹ค. 2) X-์„ ์ƒ ๊ทผ์ฒจ๊ณผ ์ƒ๋ฆฌ์  ๊ทผ์ฒจ์ด ์ผ์น˜ํ•˜๋Š” ๊ฒƒ์€ ์กฐ์‚ฌ๋Œ€์ƒ์˜ 31.94%(46๊ทผ๊ด€)์ด์—ˆ๋‹ค. 3) ์ „๊ธฐ์ €ํ•ญ์น˜์— ์˜ํ•œ ๊ฐ ์น˜์•„๋ถ€์œ„๋ณ„ ์ƒ๋ฆฌ์  ๊ทผ์ฒจ์˜ ์œ„์น˜๋Š” ๋‹ค์Œ๊ณผ ๊ฐ™์•˜๋‹ค. ๊ฐ€) ์ƒ์•… ์ค‘์ ˆ์น˜ : 0.46mm ๋‚˜) ์ƒ์•… ์ธก์ ˆ์น˜ : 0.44mm ๋‹ค) ์ƒ์•… ๊ฒฌ์น˜ : 0.44mm ๋ผ) ์ƒ์•… ์ œ1์†Œ๊ตฌ์น˜ : โ‘  ํ˜‘์ธก๊ทผ๊ด€ : 0.59mm โ‘ก ์„ค์ธก๊ทผํ™˜ : 0.34mm ๋งˆ) ์ƒ์•… ์ œ2์†Œ๊ตฌ์น˜ : 0.54mm ๋ฐ”) ์ƒ์•… ์ œ1๋Œ€๊ตฌ์น˜ : โ‘  ๊ทผ์‹ฌํ˜‘์ธก๊ทผ๊ด€ : 0.50mm โ‘ก ์›์‹ฌํ˜‘์ธก๊ทผ๊ด€ : 0.42mm โ‘ข ์„ค์ธก๊ทผ๊ด€ : 0.56mm ์‚ฌ) ํ•˜์•… ์ค‘์ ˆ์น˜ : 0.62mm ์•„) ํ•˜์•… ์ธก์ ˆ์น˜ : 0.45mm ์ž) ํ•˜์•… ๊ฒฌ์น˜ : 0.54mm ์ฐจ) ํ•˜์•… ์ œ1์†Œ๊ตฌ์น˜ : 0.47mm ์นด) ํ•˜์•… ์ œ2์†Œ๊ตฌ์น˜ : 0.34mm ํƒ€) ํ•˜์•… ์ œ1๋Œ€๊ตฌ์น˜ : โ‘  ๊ทผ์‹ฌํ˜‘์ธก๊ทผ๊ด€ : 0.54mm โ‘ก ๊ทผ์‹ฌ์„ค์ธก๊ทผ๊ด€ : 0.31mm โ‘ข ์›์‹ฌ๊ทผ๊ด€ : 0.37 mm [์˜๋ฌธ] One of the most important factors for successful endodontic therapy is an accurate length determination of physiological root apex. Some methods suggested for the measurement of root canal length, include digital-tactile sense and roentgenographic technique with measuring wire, scale and grid. But these methods do not determine an accurate working length to physiological root apex. Recently electronic measuring devices are used to locate the physiological root apex in root canal length determination and these devices are accepted as an effective apparatus. The 89 patients(116 teeth, 144 canals) among the out-patients of Yonsei University Dental Infirmary, who had an endodontic treatment in the Department of Operative Dentistry, were measured by the Root-Canal Meter^^ , as an electronic device, and radiographs to determine the distribution and location of physiological root apex, then the following results were made: (1) Range of ยฑ 1mm from the radiographic root apex were present in 88.88%(128 canals) of the subjects. (2) Physiological root apex find radiographic root apex were coincides in 31.94%(46 Canals) of the subjects. (3) The actual length of the physiological root apex of the teeth were as follow; A : in the maxillary central incisor : 0.46mm B : in the maxillary lateral incisor : 0.44mm C : in the maxillary canine : 0.44mm D : in the maxillary 1st premolar : a) Buccal : 0.59mm b) Lingual : 0.34mm E : in the maxillary 2nd premolar : 0.54mm F : in the maxillary 1st molar : a) Mesio-buccal : 0.50mm b) Disto-buccal : 0.42mm c) Lingual : 0.56mm G : in the mandibular central incisor : 0.62mm H : in the mandibular lateral incisor : 0.45mm I : in the mandibular canine : 0.54mm J : in the mandibular 1st premolar : 0.47mm K : in the mandibular 2nd premolar : 0.34mm L : in the mandibular 1st molar : a) Mesio-buccal : 0.54mm b) Mesio-lingual : 0.31mm c) Distal : 0.37mmrestrictio
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