An interproximal dental strip with a serrated zone flanked by abrasive zones in repeated longitudinal succession along a side face of the strip. A generally C-shaped trocar provides increased work space between the hands of the surgeon as well as S-shaped laparoscopic instruments placed through the trocar when laparoscopic instrument-trocar units are placed through the umbilicus. An optional embodiment of the present VISAR system may also optionally include precision fiber arrays.