Journal article
Quantitative assessment of neural development in human premolars
The Anatomical record, Vol.205(4), pp.421-429
04/01/1983
DOI: 10.1002/ar.1092050407
PMID: 6859555
Abstract
The number of nerve fibers entering a tooth gives an indication of the tooth's capacity to perform a sensory function. Nerve fiber development was quantitated from cross sections of the apical portions of 49 erupted human premolars at various stages of root development and in subjects up to 71 years of age. Neural development was incomplete in immature teeth, greatly variable in young mature teeth, and complete in older teeth. Myelinated axons changed in number but not in size during tooth development. There were significantly fewer myelinated axons in teeth with open and parallel apical foramina than in older teeth. Unmyelinated axons did not change significantly in number with development but fewer large axons were found in older teeth. The number of unmyelinated axons enclosed in a single boundary lamina tended to be lower in older teeth. As a physiologic correlate, threshold responses to electrical stimulation were also determined prior to premolar removal. Threshold stimulation decreased significantly with apical foramen maturation. A significant negative correlation was found between the threshold stimulus and the number of myelinated axons in fully developed teeth, but not in immature teeth.
Details
- Title: Subtitle
- Quantitative assessment of neural development in human premolars
- Creators
- D C Johnsen - Case Western Reserve UniversityJ Harshbarger - West Virginia UniversityH D Rymer - West Virginia University
- Resource Type
- Journal article
- Publication Details
- The Anatomical record, Vol.205(4), pp.421-429
- DOI
- 10.1002/ar.1092050407
- PMID
- 6859555
- ISSN
- 0003-276X
- eISSN
- 1097-0185
- Language
- English
- Date published
- 04/01/1983
- Academic Unit
- Pediatric Dentistry
- Record Identifier
- 9984367651702771
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