2969 KB48 KB199920252014Doll, AlexanderGoldschmidtboeing, FrankNeiss, SebastianStoerkel, UlrichWoias, Peterletnik:60številka:7/8str. 449-461, SI 87ISSN:0039-2480COBISSID:13569819URN:URN:NBN:SI:doc-JR7TFVDGenZveza strojnih inženirjev in tehnikov Slovenije et al.Strojniški vestnikelektrične zobne ščetkeglobina penetracijemehansko odstranjevanje zobnih oblogstrižne siletehnologija oscilacije-rotacijeComparison of vertical and inclined toothbrush filaments| impact on shear force and penetration depth|This paper presents a semi-analytical model to describe the action of vertical and 16°-inclined toothbrush filaments onto flat tooth surfaces and into approximal areas. The theory is based on the analytical solution of the beam equation about normal and transversal (shear) forces that deform the filaments. A 15% increase of penetration depth (approximal area model) and a 60% increase of transversal force (tooth surface model) for an inclination angle of 16° compared to a vertical filament were determined. Furthermore, that 16°-inclined filaments are able to transfer higher shear forces to the tooth compared to vertical ones was shown experimentally, which could account for the higher efficiency of plaque removal by inclined filaments compared to vertical filaments. The theoretical findings for manual and oscillating-rotating toothbrushes are discussed, and implications for their design are drawnNamen raziskave je preučitev in analiza učinka kombiniranja trenutnih prednosti električnih zobnih ščetk s 3D-gibanjem (pulzno gibanje, združeno z oscilacijami/rotacijo) in preizkušenih lastnosti naprednih ročnih zobnih ščetk, kjer so šopi ščetin nagnjeni pod kotom 16°. Za opis delovanja navpičnih in za 16° nagnjenih filamentov zobne ščetke na ravne zobne površine in bližnje predele je bil uporabljen polanalitični model. Teorija bazira na analitični rešitvi enačbe nosilcev ob upoštevanju normalnih in prečnih (strižnih) sil, ki deformirajo filamenteTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo