Study on Electrometric Pulp Testing in Permanent Teeth with Incompletely Formed Apices
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- Otawa Yumi
- Department of Pedodontics, Tokyo Dental College
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- Fujii Hiromichi
- Department of Pedodontics, Tokyo Dental College
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- Kubota Kazumi
- Department of Pedodontics, Tokyo Dental College
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- Machida Yukio
- Department of Pedodontics, Tokyo Dental College
Bibliographic Information
- Other Title
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- 歯根未完成永久歯の電気歯髄診断に関する研究
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Abstract
The purpose of this study was to investigate pulp responses to an electric pulp stimulator in permanent teeth with imcompletely formed apices.169 normal permanent central incisors of 86 children, aged from six years and nine months to thirteen years and five months, were examined in this study. Root development was rated from the standardized radiographs in 3 stages. Stage I; the apical foramen is widely diverged, similar to a funnel shape. StageII; the apical foramen is open and the canal has nearly paralell walls, the root formation is imcomplete. Stage III; the apical foramen is still open and the formation of the root is almost complete.<BR>We used an automatic“Pulp Tester”(Analytic Technology Co. ) and“Dentotest TB-08”(Malek's). The conduction media for the electric pulp testers were tooth paste (Kodomohamigaki: Lion Co. ) and electrode paste (Cardio Cream: Nihon Kohden Kohgyo Co. )<BR>The results were as follows.<BR>1)“Dentotest TB-08”with tooth paste: 13 cases (22.4%) out of the 58 cases in root development stage I and 2 cases (3.9%) out of the 51 cases in stage II did not respond up to the highest point on the electrometric pulp tester. In stage III, all cases responded to electric stimulation.<BR>2)“Dentotest TB-08”with electrode paste: 7 cases (12.1%) out of the 58 cases in stage I and 1 case (2.0%) out of the 51 cases in stage II did not re-spond spond up to the highest point of the electrometric pulp tester. In stage III, all cases responded to electric stimuration.<BR>3)“Pulp Tester”with tooth paste: 5 cases (8.6%) out of the 58 cases in stage I did not respond up to the highest point. In stage II and stage III, all cases responded to electric stimulation.<BR>4)“Pulp Tester”with electrode paste: in stage I, there were 2 cases (3.4%)out of the 58 cases did not respond up to the highest point. In stage II and stage III, all cases responded to electric stimulation.<BR>5) It appeared that threshold value decreased for both electrometric pulp testers when root development increased.
Journal
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- The Japanese Journal of Pediatric Dentistry
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The Japanese Journal of Pediatric Dentistry 24 (4), 725-732, 1986
The Japanese Society of Pediatric Dentistry
