Journal of Dental Rehabilitation and Applied Science:eISSN 2384-4272 pISSN 2384-4353

Table. 4.

Table. 4.

Incidence ratio of palatal side abfractions in maxillary posterior teeth by age

Below 2930 - 3940 - 4950 - 5960 - 69Over 70TotalX2
Without abfraction443 (98.7%)317 (96.1%)648 (92.6%)785 (89.5%)496 (84.9%)228 (90.1%)291775.723 (df = 5)
With abfraction6 (1.3%)13 (3.9%)52 (7.4%)92 (10.5%)88 (15.1%)25 (9.9%)276
Total4493307008775842533193

Chi-square test, P-value = 0.000, α = 0.05.

In terms of age, ratio of palatal side abfraction in maxillary posterior teeth surveyed for each age was 6 (1.3%) under 29 years of age, 13 (3.9%) for 30 - 39, 52 (7.4%) for 40 - 49, 92 (10.5%) for 50-59, 88 (15.1%) for 60-69, and 25 (9.9%) for 70 years old and above.

J Dent Rehabil Appl Sci 2019;35:206-13 https://doi.org/10.14368/jdras.2019.35.4.206
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