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, 84 (4), 436-43

Correlation of Noncarious Cervical Lesion Size and Occlusal Wear in a Single Adult Over a 14-year Time Span


Correlation of Noncarious Cervical Lesion Size and Occlusal Wear in a Single Adult Over a 14-year Time Span

M R Pintado et al. J Prosthet Dent.


Statement of problem: Noncarious cervical lesions are described as having a multifactorial cause, with occlusal trauma and toothbrush abrasion frequently mentioned as major factors. Finite element modeling studies have demonstrated a relocalization of occlusal stresses to the cervical area due to flexure of the crown. This may cause microcracking, especially under tensile stresses, that will lead to a loss of enamel and dentin in the cervical region. Clinical confirmation of an occlusal cause for noncarious cervical lesions has been difficult to obtain.

Purpose: This study investigated whether occlusal wear was correlated with an increase in the size of noncarious cervical lesions.

Material and methods: Loss of contour at occlusal and cervical sites on 3 teeth of a single individual was measured using digital and visualization techniques at 3 time intervals over a 14-year time span. The 1983 baseline casts and 1991, 1994, and 1997 clinical impressions of a single adult patient with existing noncarious cervical lesions were replicated in epoxy. Surfaces of all replicas were digitized with a contact digitizing system. Sequential digitized surfaces were fit together and analyzed using AnSur-NT surface analysis software. Clinical losses of surface contour by volume and depth of the left mandibular first molar and first and second premolars were recorded.

Results: Nine measurements of cervical volume loss (range 0.9 to 11.5 mm(3)) and 9 corresponding measurements of occlusal volume loss (range 0.39 to 7.79 mm(3)) were made. The correlation between occlusal and cervical volume loss was strong (r(2)=0.98) and significant (P<.0001).

Conclusion: For the single adult patient in this study, there was a direct correlation between occlusal wear and the growth of noncarious cervical lesions.

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