Abstract

Research Article

Distinguishing Traditional and Internal Craze Lines in Human Enamel

Hassan Zadeh Masoud*

Published: 18 September, 2024 | Volume 8 - Issue 1 | Pages: 029-039

Objectives: This study aims to introduce and differentiate between traditional craze lines and a newly identified type of line in enamel, termed an “internal craze line.” This novel classification enhances diagnostic precision and carries significant clinical implications for treatment strategies. The goal is to provide a clear description of these two types of lines, discuss their unique clinical implications, and highlight their differing appearances and staining characteristics, contributing to improved understanding and management of enamel anomalies.
Method and materials: Four extracted teeth exhibiting visible and internal craze lines were selected and examined using a stereo microscope to observe the structural characteristics of the lines. Cross-sections of the coronal parts of the teeth were prepared to document the differences between traditional craze lines (extending from the dentin-enamel junction [DEJ] to the enamel surface) and internal craze lines (originating at the DEJ but terminating midway through the enamel). Additionally, intraoral observations were conducted under high magnification to identify the visual differences between the two types of lines, noting that traditional craze lines can be stained while internal craze lines cannot.
Results: Microscopic examination revealed two distinct types of lines: traditional craze lines extending from the DEJ to the enamel surface and internal craze lines terminating within the enamel. Intraoral observations confirmed that these lines could be distinguished under high magnification. Traditional craze lines appear as continuous lines reaching the enamel surface and can be stained, whereas internal craze lines are shorter, do not extend to the surface, and cannot be stained.
Conclusion: The identification of internal craze lines presents significant clinical implications. Differentiating between traditional and internal craze lines can enhance diagnostic accuracy and inform treatment decisions. Recognizing internal craze lines might indicate different etiologies or risk profiles compared to traditional craze lines, influencing preventive and therapeutic strategies in dental practice. Further research is needed to explore the prevalence, causes, and long-term impacts of internal craze lines.

Read Full Article HTML DOI: 10.29328/journal.jcad.1001044 Cite this Article Read Full Article PDF

Keywords:

Crack; Craze lines; Dental enamel; Internal craze lines; Intraoral examination; Microscopy

References

  1. Yahyazadehfar M, Zhang D, Arola D. On the importance of aging to the crack growth resistance of human enamel. Acta Biomater. 2016;32:264-274. Available from: https://doi.org/10.1016/j.actbio.2015.12.038
  2. Oh C, Lee H, Kim J, Lee JH, Nguyen T, Kim KH, et al. The influence of age and orthodontic debonding on the prevalence and severity of enamel craze lines. J Am Dent Assoc. 2023;154:601-609. Available from: https://doi.org/10.1016/j.adaj.2023.04.004
  3. Lynch C, McConnell R. The cracked tooth syndrome. J Can Dent Assoc. 2002;68:470-475. Available from: https://pubmed.ncbi.nlm.nih.gov/12323102/
  4. Clark D, Sheets C, Paquette J. Definitive diagnosis of early enamel and dentin cracks based on microscopic evaluation. J Esthet Restor Dent. 2003;15:391-401. Available from: https://doi.org/10.1111/j.1708-8240.2003.tb00963.x
  5. Davich M. Clinical detection and decision-making considerations for cracked teeth. Endod Therapy. 2004;4:4–7. Available from: https://sitefiles.tdo4endo.com/files/webid0186/imagesdr/200402ENDO_DavichCrackedTeeth.pdf
  6. Ghorbanzadeh A, Aminifar S, Shadan L, Ghanati H. Evaluation of three methods in the diagnosis of dentin cracks caused by apical resection. J Dent (Tehran). 2013;10:175-185. Available from: https://pubmed.ncbi.nlm.nih.gov/23724218/
  7. Alsolaihim AN, Alsolaihim AA, Alowais LO. In vivo and in vitro diagnosis of cracked teeth: A review. J Int Oral Health. 2019;11:329-333. Available from: https://journals.lww.com/jioh/fulltext/2019/11060/in_vivo_and_in_vitro_diagnosis_of_cracked_teeth__a.1.aspx
  8. Bajaj D, Nazari A, Eidelman N, Arola DD. A comparison of fatigue crack growth in human enamel and hydroxyapatite. Biomater. 2008;29:4847-4854. Available from: https://doi.org/10.1016%2Fj.biomaterials.2008.08.019
  9. Abou-Rass M. Crack lines: The precursors of tooth fractures — their diagnosis and treatment. Quintessence Int. 1983;4:437-447. Available from: https://pubmed.ncbi.nlm.nih.gov/6574554/
  10. Ellis SG. Incomplete tooth fracture—proposal for a new definition. Br Dent J. 2001;190:424-428. Available from: https://www.nature.com/articles/4800873
  11. Xu HH, Kelly JR, Jahanmir S, Thompson VP, Rekow ED. Enamel subsurface damage due to diamond tooth-preparation. J Dent Res. 1997;76:1698-1706. Available from: https://doi.org/10.1177/00220345970760101201
  12. Mamoun JS, Napoletano D. Cracked tooth diagnosis and treatment: An alternative paradigm. Eur J Dent. 2015;9:293–303. Available from: https://doi.org/10.4103/1305-7456.156840
  13. Johnson R. Descriptive classification of traumatic injuries to the teeth and supporting structures. J Am Dent Assoc. 1981;102:195-197. Available from: https://doi.org/10.14219/jada.archive.1981.0112
  14. Andreasen JO. Traumatic Injuries of the Teeth. 2nd ed. Copenhagen: Munksgaard; 1981:19.
  15. Caufield JB. Hairline tooth fracture: A clinical case report. J Am Dent Assoc. 1981;102:501-502. Available from: https://doi.org/10.14219/jada.archive.1981.0145
  16. Kahler W. The cracked tooth conundrum: Terminology, classification, diagnosis, and management. Am J Dent. 2008;21:275-282. Available from: https://www.amjdent.com/Archive/ReviewArticles/2008/Kahler%20AJD%2010-08.pdf
  17. American Association of Endodontics. Cracking the cracked tooth code. Endod Colleagues Excell Newsl. 1997.
  18. Bud M, Jitaru S, Lucaciu O, Korkut B, Dumitrascu-Timis L, Ionescu C, et al. The advantages of the dental operative microscope in restorative dentistry. Med Pharm Rep. 2021;94:22-27. Available from: https://doi.org/10.15386/mpr-1662
  19. Christensen GJ. Magnification in dentistry: Useful tool or another gimmick? J Am Dent Assoc. 2003;134:1647-1650. Available from: https://doi.org/10.14219/jada.archive.2003.0111
  20. Li Z, Holamoge YV, Li Z, Zaid W, Osborn ML, Ramos A, Miller JT, Li Y, Yao S, Xu J. Detection and analysis of enamel cracks by ICG-NIR fluorescence dental imaging. Ann N Y Acad Sci. 2020 Sep;1475(1):52-63. Available from: https://doi.org/10.1111/nyas.14374
  21. Mathew S, Thangavel B, Mathew CA, Kailasam S, Kumaravadivel K, Das A. Diagnosis of cracked tooth syndrome. J Pharm Bioallied Sci. 2012;4(Suppl 2). Available from: https://doi.org/10.4103%2F0975-7406.100219
  22. Palamara J, Phakey PP, Rachinger WA, Orams HJ. Ultrastructure of spindles and tufts in human dental enamel. Adv Dent Res. 1989;3:249-257. Available from: https://doi.org/10.1177/08959374890030022601
  23. Hudson AL. A study of the effects of mesiodistal reduction of mandibular anterior teeth. Am J Orthod. 1956;42:615-624. Available from: https://doi.org/10.1016/0002-9416(56)90103-8
  24. Desoutter A, Panayotov I, Cuisinier F, Carayon D. Human tooth enamel tuft drapes revealed by microtomography. Arch Oral Biol. 2022;141:105487. Available from: https://doi.org/10.1016/j.archoralbio.2022.105487

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