Abstract: The invention relates to oral and dental hygiene and cleaning agents, including—with respect to the weight thereof—a) 0.001 to 5 wt % of copolymer(s) comprising at least one structural unit of formula (A1) and at least one structural unit of formula (A2); b) formula (A1), formula (A2), wherein R1 stands for a (C1 to C18)-alkyl group, R2 stands for a (C1 to C6)-alkyl group, M stands for a hydrogen atom or an equivalent of a monovalent or polyvalent cation; and c) 0.1 to 10 wt % of pentasodium triphosphate; which result synergistically in improved cleaning power for surface stains on teeth and in improved prevention of reforming dental calculus, without abrasion of hard dental tissue being increased.

Abstract: A clamping assembly (130) for clamping a guidebar (120) of a chainsaw (100) to a chainsaw body (110) via a clutch cover (150) including a receiving opening (210) having a series of teeth (212) defined at an internal periphery thereof is provided. The clamping assembly (130) includes an inner knob base (220) rotatably received within the receiving opening (210), a rack element (240) disposed at a portion of the inner knob base (220) to be engageable with the teeth (212), and a knob (140) configured to contact at least a portion of the inner knob base (220). The knob (140) includes a driver reception slot (252) formed therein to engage at least one driver (224) extending from the inner knob base (220). Responsive to rotation of the knob (140), the driver (224) engages the knob (140) to rotate the inner knob base (220) such that the rack element (240) sequentially engages the teeth (212) while tightening the knob (140) to the chainsaw body (110).