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The measurement parameters of horizontal and vertical changes in radiographic images.
HW1, change in horizontal ridge width 1 mm; HW3, change in horizontal ridge width 3 mm; HW5, change in horizontal ridge width 5 mm; VHB, change in ridge height at the buccal crest; VMC, change in the vertical height measured at the mid-crestal area; VHL, change in ridge height at the lingual crest.
