EXHIBIT 11.1 Gentle Dental Service Corporation Statement Showing Calculations of Earnings (Loss) per Share (in thousands, except per share amounts) - -------------------------------------------------------------------------------- Nine Months Ended Years Ended December 31, September 30, ---------------------------------- --------------------- 1993 1994 1995 1995 1996 --------- --------- --------- --------- --------- (unaudited) (unaudited) Weighted average number of common shares outstanding.......................................... 1,030 1,150 1,331 1,302 1,485 Weighted average number of common stock equivalent shares from exercise of stock options and warrants issued.................................. - 4 49 64 -(1) --------- --------- --------- --------- --------- Shares used in per share calculation............. 1,030 1,154 1,380 1,366 1,485 Net income (loss)................................ - - $ 257 $ 284 $ (670) Pro forma net income............................. $ 243 $ 404 - - - Accretion of mandatorily redeemable common stock............................................ - - - - (80) --------- --------- --------- --------- --------- Net income (loss) applicable to common stock..... $ 243 $ 404 $ 257 $ 284 $ (750) ========= ========= ========= ========= ========= Net income (loss) per share.......................... $ 0.24 $ 0.35 $ 0.19 $ 0.21 $ (0.51) <FN> (1) Excluded because their effect is anti-dilutive </FN>