Flower and Snake 4 White Uniform Rope Slave (1986)
Directors

Flower and Snake 4: White Uniform Rope Slave花と蛇 白衣縄奴隷
Overview
A perverted dentist (and dental assistant) that likes to sleep with his patients, gets obsessed with one in particular who also happens to be a lesbian. He uses everthing he can think of to abuse this woman and her female lover. Ropes/Dental tools/Ice Buckets/Candles/ (the works) and sometimes he sets the mood with something from his classical music record collection.
Cast

Ran Masaki

Minako Ogawa
Kazuyo Ezaki

Masayoshi Nogami
Crew

Masahiro Kakefuda
Oniroku Dan

Shōgorō Nishimura
Teio Noda
Heihachiro Watanabe
Koji Okumura
Shigeru Okuhara
Haruyasu Ito
Tomoyuki Akaishi
Kuniaki Mihagi
Also known as: Hana to hebi: hakui nawa dorei
Description: ostensibly based on a novel by the popular Oniroku Dan, is little more than a continual parade of S & M set pieces featuring the pulchritudinous Ran Masaki as a dentist’s nurse who quickly finds herself strapped in the chair for some dental torture and sustained cinematic ogling of her 52-inch bust as she writhes in pain.