Trend-analysis of dental hard-tissue conditions as function of tooth age

Amnah A. Algarni, Peter S. Ungar, Frank Lippert, E. Angeles Martínez-Mier, George J. Eckert, Carlos González-Cabezas, Anderson T. Hara

Research output: Contribution to journalArticle

3 Scopus citations


Objective: This retrospective in-vitro study investigated tooth age effect on dental hard-tissue conditions. Methods: Unidentified extracted premolars (n = 1500) were collected and their individual age was estimated (10–100 (±10) years old (yo)) using established dental forensic methods Dental caries, fluorosis and tooth wear (TW) were assessed using the International Caries Detection and Assessment System (ICDAS; 0–5 for crown and 0–2 for root), Thylstrup-Fejerskov (TFI; 0–9) and Basic Erosive Wear Examination (BEWE; 0–3) indices, respectively. Staining and color were assessed using the modified-Lobene (MLI) (0–3) and VITA shade (B1-C4) indices, respectively. Relationships between indices and age were tested using regression models. Results: Starting at age ∼10yo, presence of caries increased from 35% to 90% at ∼50yo (coronal), and from 0% to 35% at ∼80yo (root). Caries severity increased from ICDAS 0.5 to 2 at ∼40yo and from ICDAS 0 to 0.5 at ∼60yo for coronal and root caries, respectively. Presence of TW increased from 25% (occlusal) and 15% (smooth-surfaces) to 100% at ∼80yo. TW severity increased from BEWE 0.5 to 2 at ∼50yo (occlusal) and ∼0.3 to 1.5 at ∼50yo (smooth-surfaces). Percentage and severity of fluorosis decreased from 70% to 10% at ∼80yo, and from TFI 1 to 0 at ∼90yo, respectively. Percentage of extrinsic staining increased from 0% to 85% at ∼80yo and its severity increased from MLI 0 to 2 at ∼70yo. Color changed from A3 to B3 at ∼50yo (crown), and from C2 to A4 at ∼85yo (root). Conclusions: Aging is proportionally related to the severity of caries, TW, staining, and inversely to dental fluorosis. Teeth become darker with age.

Original languageEnglish (US)
Pages (from-to)107-112
Number of pages6
JournalJournal of Dentistry
StatePublished - Jul 2018


  • Aging
  • Caries
  • Dentin
  • Enamel
  • Fluorosis
  • Tooth color
  • Tooth wear

ASJC Scopus subject areas

  • Dentistry(all)

Fingerprint Dive into the research topics of 'Trend-analysis of dental hard-tissue conditions as function of tooth age'. Together they form a unique fingerprint.

  • Cite this