I. Study design (maximum score-7):

A. Objective

1 Point if clearly formulated

B. Sample size

1 Point if more than 15

C. Sample evaluation

1 Point if estimated before collection of data

D. Selection criteria

1 Point if clearly described

E. Study time

1 Point if prospective

F. Randomization

1 Point if stated

G. Control group

1 Point if present

II. Study measurements (maximum score-3)

H. Measurement method

1 Point if clearly described

I. Blind measurement

1 Point if stated

J. Resorption detection

1 Point if radiographs, CBCT or micro-CT

III. Statistical analysis (maximum score-4)

K. Statistical analysis method

1 Point if appropriate

L. Error of method

1 Point if stated

M. Statistical significance level

1 Point if p value stated

N. Data presentation

1 Point if any variability measures stated