EXHIBIT 11.1 GENTLE DENTAL SERVICE CORPORATION STATEMENT SHOWING CALCULATIONS OF EARNINGS (LOSS) PER SHARE <F1> (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS) - ------------------------------------------------------------------------------------------------------------------------------- YEARS ENDED DECEMBER 31, SIX MONTHS ENDED JUNE 30, 1993 1994 1995 1995 1996 ------------- ------------ ------------- -------------- ------------- Weighted average number of common shares outstanding 1,032 1,152 1,333 1,262 1,466 Weighted average number of common stock equivalent shares from exercise of stock options and warrants issued before July 1, 1995 (using the modified treasury stock method) -- 17 84 94 --<F2> Weighted average number of common stock equivalent shares from exercise of stock options and warrants issued after July 1, 1995 (using the modified treasury stock method) 272 284 280 323 186 ------------- ------------ ------------- -------------- ------------- Shares used in per share calculation 1,304 1,452 1,697 1,679 1,651 ============= ============ ============= ============== ============= Net income (loss) $ 243 $ 404 $ 257 $ 238 $ (384) Accretion of mandatorily redeemable common stock -- -- -- -- (69) Modified treasury stock adjustments to net income 305 162 147 98 17 ------------- ------------ ------------- -------------- ------------- Net income (loss) applicable to common stock $ 548 $ 566 $ 404 $ 336 $ (436) ============= ============ ============= ============== ============= Net income (loss) per share $ 0.42 $ 0.39 $ 0.24 $ 0.20 $ (0.26) - ---------------------- <FN> <F1> Gives effect to a one-for-two reverse split of the Company's common stock to be executed before the completion of the proposed initial public offering of the Company's common stock. <F2> Excluded because their effect is anti-dilutive. </FN>