Terms containing Tooth

Subject	English	Italian
agric., mech.eng.	alfalfa tooth	dente flessibile ad estremità schiacciata
agric., mech.eng.	alfalfa tooth	dente ad estremità schiacciata
industr.	alligators'tooth	strappo di trafilatura
med.	anchorage tooth	dente di sostegno
agric., mech.eng.	angled tooth	dente a punta acuta
med.	apex of root of tooth	apice della radice del dente (apex radicis dentis)
med.	apex of root of tooth	apice del dente (apex radicis dentis)
med.	apical foramen of tooth	forame apicale della radice del dente (foramen apicis dentis)
med.	apical foramen of tooth	forame apicale del dente (foramen apicis dentis)
nat.sc., agric.	arrow-tooth flounder	passera canina (Atheresthes stomias)
med.	artificial tooth	dente artificiale
med.	artificial tooth stump	pilastro moncone
med.	baby tooth	dente infantile (dens deciduus)
med.	baby tooth	dente primario (dens deciduus)
med.	baby tooth	dente temporaneo (dens deciduus)
med.	baby tooth	dente da latte (dens deciduus)
med.	baby tooth	dente deciduo (dens deciduus)
mech.eng.	basic rack tooth profile	profilo di riferimento
mech.eng.	basic tooth profile	profilo di riferimento
health.	battery-powered tooth-brush	spazzolino da denti alimentato a batteria
med.	bicuspid tooth	dente premolare (dens premolaris)
med.	bicuspid tooth	dente bicuspidato (dens premolaris)
med.	bicuspid tooth	premolare (dens premolaris)
med.	bicuspide tooth	premolare
med.	bicuspide tooth	dente premolare
med.	bicuspide tooth	dente bicuspidato
agric., construct.	bucket tooth	dente di scavo
med.	Buehlmann tooth lines	fibre di Buehlmann
med.	canine tooth	canino (dens caninus)
med.	canine tooth	cuspide dentaria
med.	canine tooth	dente canino (dens caninus)
met.	cast tooth	dente greggio (di fusione)
med.	cavity of tooth	cavità pulpare
med.	cavity of tooth	cavità dentale
agric.	center tooth attachment	dente centrale
med.	ceramic and metal bridge tooth element	elemento di ponte in porcellana e metallo
med.	Charcot-Marie-Tooth atrophy	atrofia muscolare progressiva nevritica di Charcot-Tooth
med.	Charcot-Marie-Tooth disease	malattia di Charcot-Marie
health.	Charcot-Marie-Tooth disease	sindrome di Charcot-Marie-Tooth
health.	Charcot-Marie-Tooth disease	neuropatia sensitivo-motoria ereditaria
health.	Charcot-Marie-Tooth disease	malattia di Charcot-Marie-Tooth
health.	Charcot-Marie-Tooth disease	atrofia muscolare peroneale
med.	Charcot-Marie-Tooth disease	sindrome CMT
med.	Charcot-Marie-Tooth disease	atrofia di Charcot-Marie
med.	Charcot-Marie-Tooth syndrome	atrofia muscolare peroneale
med.	Charcot-Marie-Tooth syndrome	sindrome CMT
med.	Charcot-Marie-Tooth syndrome	malattia di Charcot-Marie
med.	Charcot-Marie-Tooth syndrome	sindrome di Charcot-Marie-Tooth
med.	Charcot-Marie-Tooth syndrome	atrofia di Charcot-Marie
med.	cheek tooth	dente molare (dens molaris)
agric.	chisel tooth	dente di coltivatore pesante
agric.	chisel tooth	dente di coltivatore-ripuntatore
agric.	chisel tooth shovel	zappetta a punta doppia con bordi smussati
mech.eng.	chordal tooth thickness	spessore cordale
mech.eng.	chordal tooth thickness	spessore cordale di un dente
industr., construct., mech.eng.	clearer tooth	dente piallante
med.	clinical root of tooth	radice clinica del dente (radix clinica dentis)
met.	comb tooth method	procedimento detto a pettine
med.	congenital tooth	dente prenatale (dens connatalis, dens natalis)
med.	congenital tooth	dente natale (dens connatalis, dens natalis)
med.	conical tooth	dente conoide
industr.	crocodiles'tooth	strappo di trafilatura
med.	crown of a tooth	corona del dente (corona dentis)
agric.	curved knife-tooth harrow	erpice coltivatore
agric.	curved knife-tooth harrow	erpice Acme
agric.	curved knife-tooth harrow	erpice a lame tipo Acme
agric., mech.eng.	curved tooth	dente arcuato
agric., mech.eng.	curved tooth	dente curvo
mech.eng.	curved-tooth bevel gear	ruota conica a dentatura curva
mech.eng.	curved-tooth bevel gear	ingranaggi conici a spirale
med.	cusp of crown of tooth	cuspide dei canini (cuspis coronae dentis)
med.	cusp of crown of tooth	cuspide della corona dei denti (cuspis coronae dentis)
med.	cusp of crown of tooth	cuspide dentaria (cuspis coronae dentis)
med.	cusp of tooth	cuspide dei canini (cuspis coronae dentis)
med.	cusp of tooth	cuspide della corona dei denti (cuspis coronae dentis)
med.	cusp of tooth	cuspide dentaria (cuspis coronae dentis)
med.	cuspid tooth	canino (dens caninus)
med.	cuspid tooth	dente canino (dens caninus)
med.	cuspidate tooth	dente cuspidato
med.	cuspidate tooth	canino (dens caninus)
med.	cuspidate tooth	dente canino (dens caninus)
med.	cuticle of tooth	cuticola dello smalto
med.	cutting tooth	incisivo (dens incisivus)
industr., construct.	cutting tooth	dente tagliente
mech.eng.	cutting tooth	dente di utensile
med.	cutting tooth	dente incisivo (dens incisivus)
fish.farm.	dagger-tooth pike-conger	murena del Giappone (Muraenesox cinereus)
med.	deciduous tooth	dente infantile (dens deciduus)
med.	deciduous tooth	dente temporaneo (dens deciduus)
med.	deciduous tooth	dente da latte (dens deciduus)
med.	deciduous tooth	dente primario (dens deciduus)
med.	deciduous tooth	dente deciduo (dens deciduus)
mech.eng.	depth of tooth	profondità delle gengive
med.	dermal tooth	squama placoide
med.	dermal tooth	scaglia placoide
med.	diatoric tooth	dente diatorico
commun.	distribution saw-tooth bundle	pacchetto a dente di sega di distribuzione
fish.farm.	dog-tooth tuna	palamita bianca (Orcynopsis unicolor (Geoffroy St.-Hilaire), Pelamys bonapartei, Sarda unicolor)
nat.res.	dog-tooth violet	eritronio dente di cane (Erythronium dens-canis Lin.)
nat.res.	dog-tooth violet	dente di cane (Erythronium dens-canis Lin.)
fish.farm.	dog's tooth bream	dentice mediterraneo (Dentex dentex (Linnaeus), Dentex vulgaris)
fish.farm.	dog's tooth bream	dentice (Dentex dentex, Dentex vulgaris)
fish.farm.	dog's tooth bream	dentale (Dentex dentex, Dentex vulgaris)
nat.sc., agric.	dogs's-tooth-grass	gramigna comune (Cynodon dactylon Pers.)
agric.	double-tooth hoe	bidente
agric., mech.eng.	duckfoot tooth	dente a falcione
agric., mech.eng.	duckfoot tooth	dente rigido a spatula
agric.	egg tooth	dente di uovo
transp., mech.eng.	eighty-one tooth pinion	pignone a 81 denti
mun.plan.	electric tooth brush	spazzolino elettrico da denti
med.	extraction of impacted tooth	estrazione dente incluso
med.	eye tooth	canino (dens caninus)
med.	eye tooth	dente canino (dens caninus)
mech.eng.	face of tooth	fianco di dente
mech.eng.	face of tooth	faccia di dente
mech.eng.	feed per tooth	avanzamento per dente
med.	first incisor tooth	dente incisivo mediale (dens incisivus medialis)
mech.eng.	form of gear tooth	profilo del dente
met.	gear tooth	dente del pignone
mech.eng.	gear tooth engagement	ingranamento
mech.eng.	gear tooth engagement	presa
mech.eng.	gearing toothing	dentatura a scanalature
med.	gold and plastic bridge tooth element	elemento di ponte in oro e résina
med.	gold and porcelain bridge tooth element	elemento di ponte in oro e porcellana
agric.	guard tooth	dente paralama
transp., mech.eng.	guide tooth	dente di guida
agric., mech.eng.	harrow tooth	dente di erpice
agric., mech.eng.	harrow tooth	punta di erpice
met.	helical tooth	spina di pesce
agric., mech.eng.	helical tooth	dente elicoidale senso verticale
met.	herringbone tooth	spinapesce
mech.eng.	herring-bone toothing	dentatura a treccia
med.	hollow artificial tooth	dente artificiale vuoto
textile	hound's tooth	pied-de-poule
med.	Hutchinson's tooth	dente di Hutchinson
med.	impacted tooth	dente incastrato
med.	impacted tooth	dente prigioniero
med.	incisor tooth	incisivo (dens incisivus)
med.	incisor tooth	dente incisivo (dens incisivus)
mech.eng.	insert-tooth saw	sega a denti riportati
mech.eng.	inserted-tooth saw	sega a denti riportati
med.	inside tooth surface-related	vestibolare
gen.	inside tooth surface-related	relativo a cavità o spazi detti "vestiboli"
tech.	inverted tooth chain	catena silenziosa
nat.sc., agric.	irregular tooth	sopradente
industr., construct.	knife tooth	dente tagliente
agric.	knife tooth	dente a coltello
agric., mech.eng.	long tooth	dente lungo
nat.res.	long-tooth croaker	ombrina tigre (Otolithes ruber)
met.	machine for moulding gear wheels by means of a tooth block	macchina a sagoma od a sciablona per formare ingranaggi
med.	Marie-Tooth disease	malattia di Charcot-Marie
med.	Marie-Tooth disease	sindrome CMT
med.	Marie-Tooth disease	atrofia muscolare peroneale
med.	Marie-Tooth disease	sindrome di Charcot-Marie-Tooth
med.	Marie-Tooth disease	atrofia di Charcot-Marie
med.	milk tooth	dente temporaneo (dens deciduus)
med.	milk tooth	dente primario (dens deciduus)
med.	milk tooth	dente infantile (dens deciduus)
med.	milk tooth	dente da latte (dens deciduus)
med.	milk tooth	dente deciduo (dens deciduus)
med.	molar tooth	dente molare (dens molaris)
agric., mech.eng.	moss tooth	dente demuschiante
med.	neck of a tooth	colletto dentario
med.	neck of a tooth	colletto del dente
med.	neck of tooth	colletto dentario
med.	neck of tooth	linea cervicale del dente
med.	neck of tooth	colletto del dente
mech.eng.	normal tooth thickness	spessore normale
mech.eng.	offset of tooth trace	eccentricità delle linee dei fianchi
agric.	oval faced tooth shovel	zappetta a punta doppia con bordi smussati
agric.	peg tooth harrow	erpice a denti rigidi
industr., construct., mech.eng.	peg-tooth saw	sega a denti triangolari
med.	permanent tooth	dente permanente (dens permanens)
met.	pinion tooth	dente del pignone
med.	pivot tooth	dente a perno
med.	pivot tooth with false stump	dente con perno moncone
med.	premolar tooth	dente bicuspidato (dens premolaris)
med.	premolar tooth	dente premolare (dens premolaris)
med.	premolar tooth	premolare (dens premolaris)
med.	prenatal tooth	dente natale (dens connatalis, dens natalis)
med.	prenatal tooth	dente prenatale (dens connatalis, dens natalis)
med.	primary tooth	dente infantile (dens deciduus)
med.	primary tooth	dente primario (dens deciduus)
med.	primary tooth	dente da latte (dens deciduus)
med.	primary tooth	dente temporaneo (dens deciduus)
med.	primary tooth	dente deciduo (dens deciduus)
med.	pulp of a tooth	polpa dentale (pulpa dentis)
agric., mech.eng.	quack grass tooth	dente flessibile
agric., mech.eng.	quack grass tooth	dente a C
agric., mech.eng.	quack grass tooth	dente oscillante
agric., mech.eng.	quick grass tooth	dente elastico
agric., mech.eng.	quick grass tooth	dente flessibile
agric., mech.eng.	quick grass tooth	dente oscillante
mech.eng.	rack toothing	dentatura di cremagliera
med.	radiograph of a tooth	odontografia
fish.farm.	ragged-tooth shark	cagnaccio (Carcharias ferox, Odontaspis ferox)
industr., construct., mech.eng.	raker tooth	dente piallante
transp., mech.eng.	ratchet tooth	dente a forma di dente di sega
mech.eng.	rectilineal face toothing	dentatura diritta
agric., mech.eng.	regular harrow tooth	dente elastico
agric., mech.eng.	regular harrow tooth	dente flessibile
agric., mech.eng.	regular harrow tooth	dente a C
agric., mech.eng.	regular harrow tooth	dente oscillante
health., tech., law	resin tooth bonding agent	adesivo odontoiatrico a base di resina
industr., construct.	ripper tooth	dente tagliente
agric.	ripper tooth	dente a coltello
chem., el.	roll-tooth crusher	frantoio a cilindri dentati
med.	root canal of tooth	canale pulpare (canalis radicis dentis)
med.	root canal of tooth	canale radicolare
med.	root canal of tooth	canale della radice (canalis radicis dentis)
med.	root canal of tooth	canale della radice dentaria
transp., mech.eng.	root of a gear tooth	radice di un dente di ingranaggio
med.	root of the tooth	radix dentis
med.	root of the tooth	radice del dente
med.	root of tooth	radice dentaria (radix dentis)
med.	root of tooth	radice anatomica (radix dentis)
med.	root of tooth	radice (radix dentis)
med.	root of tooth	radice del dente (radix dentis)
med.	root tooth-canal	canale pulpare (canalis radicis dentis)
med.	root tooth-canal	canale della radice (canalis radicis dentis)
agric.	saw tooth	dente
commun.	saw tooth	dente di sega
met.	saw tooth bit	corona dentata
textile	saw tooth crimp	ondulazione Z
met.	saw tooth dirt trap	fermascoria a denti di Sega
el.	saw-tooth filament	filamento a denti di sega
commun., el.	saw-tooth generator	generatore di denti di sega
commun.	saw-tooth keyboard	tastiera ad azione diretta
telegr.	saw-tooth keyboard	tastiera meccanica
construct.	saw-tooth roof	copertura a shed
mech.eng.	saw tooth setting machine	allicciatrice per seghe
commun., IT	saw-tooth signal	segnale a dente di sega
IT, el.	saw-tooth voltage	tensione a dente di sega
med.	second incisor tooth	dente incisivo laterale (dens incisivus lateralis)
industr., construct., mech.eng.	sliver tooth	dente dorsale
nat.sc., agric.	small-tooth weakfish	ombrina dentata (Cynoscion steindachneri)
med.	solid artificial tooth	dente artificiale pieno
mech.eng.	solid-tooth saw	sega normale
fish.farm.	South European tooth-carp	nono (Aphanius fasciatus)
industr., construct.	spike tooth	dente
agric.	spike tooth	vangheggia a punta aguzza
industr., construct.	spike tooth	punta
agric.	spike tooth	vangheggia a coltello
agric.	spike-tooth cylinder	battitore a denti
agric.	spike-tooth harrow	erpice a denti rigidi
agric.	spike tooth harrow	erpice a denti rigidi
agric.	spike tooth roller	rullo a piè di pecora
agric.	spike tooth roller	rullocostipatore
agric.	spike tooth roller	rullo a denti
agric.	spike tooth roller	rullo a punte
agric., mech.eng.	spring tooth	dente flessibile
agric., mech.eng.	spring tooth	dente oscillante
agric., mech.eng.	spring tooth	dente elastico
agric.	spring-tooth cultivator	coltivatore a denti flessibili
agric.	spring tooth cultivator	coltivatore a denti flessibili
agric.	spring tooth field cultivator	coltivatore a denti flessibili
agric.	spring tooth harrow	erpice canadese
agric.	spring tooth harrow	erpice a denti flessibili
agric.	spring tooth harrow	erpice a molle
agric.	spring-tooth harrow	erpice canadese
agric.	spring-tooth harrow	erpice a lame flessibili
agric.	spring tooth harrow	erpice a denti elastici
agric., mech.eng.	spring-shank tooth	dente oscillante
agric., mech.eng.	spring-shank tooth	dente flessibile
agric., mech.eng.	spring-shank tooth	dente elastico
industr., construct.	staggered tooth	dente sfalsato
mech.eng.	staggered-tooth double-helical gear	ruota cilindrica a dentatura elicoidale sfalsata
mech.eng.	standard basic rack tooth profile	profilo di riferimento
agric.	stiff tooth cultivator	coltivatore a denti rigidi
agric.	stiff tooth cultivator	scarificatore
agric., mech.eng.	straight curved tooth	dente rigido curvo
agric., mech.eng.	straight curved tooth	dente rigido arcuato
agric., mech.eng.	straight tooth	dente verticale
agric., mech.eng.	straight tooth	dente diritto
mater.sc., mech.eng.	straight tooth bevel gear	ingranaggio conico sghembo
mech.eng.	straight-tooth gear	ruota a denti diritti
mech.eng.	straight-tooth gear	ruota a dentatura diritta
mech.eng.	straight-tooth gear wheel	ruota a denti diritti
mech.eng.	straight-tooth gear wheel	ruota a dentatura diritta
transp., mech.eng.	straight-tooth spur gear	ingranaggio a denti dritti
life.sc.	sweet tooth	gallinaccio spinoso (Hydnum repandum, Dentinum repandum)
life.sc.	sweet tooth	steccherino dorato (Hydnum repandum, Dentinum repandum)
med.	temporary tooth	dente infantile (dens deciduus)
med.	temporary tooth	dente da latte (dens deciduus)
med.	temporary tooth	dente temporaneo (dens deciduus)
med.	temporary tooth	dente primario (dens deciduus)
med.	temporary tooth	dente deciduo (dens deciduus)
nat.res.	tiger-tooth croaker	ombrina tigre (Otolithes ruber)
med.	tip of root of tooth	apice della radice del dente (apex radicis dentis)
med.	tip of root of tooth	apice del dente (apex radicis dentis)
nat.sc., mech.eng.	tipped-tooth	rinforzato con metalli duri
med.	tooth abscess	ascesso dentario
med.	tooth-ache	odontalgia (dentagra)
med.	tooth-ache	mal di denti (dentagra)
industr., construct., mech.eng.	tooth angle	angolo di becco
med.	tooth anlage	abbozzo dentario
met.	tooth block	modello del dente
met.	tooth block holder	colonna della sagoma
met.	tooth block holder	pilastro della sagoma
mun.plan.	tooth brush	spazzolino da denti
mun.plan.	tooth-brush holder	custodia per spazzolini da denti
med.	tooth brushing	spazzolatura dei denti
med.	tooth bud	germe dentario
book.bind.	tooth burnisher	brunitore
med.	tooth cement	cemento (dentario; cementum)
mech.eng.	tooth crest	superficie di testa del dente
mech.eng.	tooth curve	linea del fianco
med.	tooth decay	carie dentaria
med.	tooth decay	carie
med.	tooth deposit	tartaro
med.	tooth deposit	patina dentaria
mech.eng.	tooth depth	altezza del dente
mech.eng.	tooth depth of bevel gear	altezza del dente della ruota conica
med.	Tooth disease	sindrome di Charcot-Marie-Tooth
med.	Tooth disease	malattia di Charcot-Marie
med.	Tooth disease	sindrome CMT
med.	Tooth disease	atrofia muscolare peroneale
med.	Tooth disease	atrofia di Charcot-Marie
med.	tooth eruption	eruzione dei denti
med.	tooth extraction	estrazione dentaria
med.	tooth fitted with metallic pins	dente ad uncino
mech.eng.	tooth flank	faccia di dente
mech.eng.	tooth flank	fianco di dente
agric.	tooth for harrow	dente di erpice
med.	tooth fracture	odontoclasi
life.sc.	tooth fungus	gallinaccio spinoso (Hydnum repandum, Dentinum repandum)
life.sc.	tooth fungus	steccherino dorato (Hydnum repandum, Dentinum repandum)
med.	tooth germ	germe dentario
med.	tooth germ	abbozzo dentario
mech.eng.	tooth height	profondità delle gengive
med.	tooth hood	odontoclamide
med.	tooth hood	cappuccio gengivale
nat.sc., agric.	tooth-legged flea beetle	altica della barbabietola (Chaetocnema concinna)
nat.sc., agric.	tooth-legged flea beetle	altica delle rape (Chaetocnema concinna)
mech.eng.	tooth lock washer	rondella dentata a ventaglio
mech.eng.	tooth lock washer	rondella elastica
med.	tooth loosening	mobilità dentaria
mech.eng., construct.	tooth marking	impronta sul dente
industr., construct.	tooth mill	mulino sminuzzatore a denti
mech.eng.	tooth of a saw	dente di sega
mech.eng.	tooth of a tool	dente di utensile
med.	tooth of axis	osso odontoide (dens axis, dens epistrophei)
med.	tooth of axis	processo odontoide dell'pistrofeo (dens axis, dens epistrophei)
med.	tooth of axis	apofisi odontoide (dens axis, dens epistrophei)
med.	tooth of axis	dente dell'epistrofeo (dens axis, dens epistrophei)
med.	tooth of epistropheus	processo odontoide dell'pistrofeo (dens axis, dens epistrophei)
med.	tooth of epistropheus	apofisi odontoide (dens axis, dens epistrophei)
med.	tooth of epistropheus	osso odontoide (dens axis, dens epistrophei)
med.	tooth of epistropheus	dente dell'epistrofeo (dens axis, dens epistrophei)
mech.eng., el.	tooth pitch	passo di cava
agric.	tooth point shovel	vangheggia a punta semplice curvata
med.	tooth polyp	polipo polpare
med.	tooth primordium	abbozzo dentario
mech.eng.	tooth profile	profilo del dente
mech.eng.	tooth profile	profilo trasversale
mech.eng.	tooth profile on normal section	profilo normale
med.	tooth pulp	polpa dentaria (pulpa dentis)
med.	tooth pulp	endodonzio (pulpa dentis)
med.	tooth pulp	polpa del dente (pulpa dentis)
med.	tooth rasch	strofulo (strophulus, lichen infantium)
med.	tooth rasch	prurigo strofulo (strophulus, lichen infantium)
agric.	tooth rasp	raspa dentaria
mech.eng.	tooth root surface	superficie di piede del dente
med.	Tooth's type	tipo di Tooth
med.	tooth sac	sacculus dentis
health., tech., law	tooth shade material	materiale per sfumature cromatiche dentarie
mech.eng.	tooth shape	profilo del dente
med.	tooth shells	Scafopodi
med.	tooth socket	alveolo dentario (alveolus dentalis, alveolus)
med.	tooth socket	alveolo dentale (alveolus dentalis, alveolus)
mech.eng.	tooth space	vano fra due denti contigui
mech.eng.	tooth spacing	passo
mech.eng.	tooth spacing	distanziamento dei denti
med.	tooth spasm	eclampsia infantile
med.	tooth stump	moncone del dente
mech.eng., el.	tooth support	dita pressapacco
mech.eng.	tooth surface	fianco di dente
mech.eng.	tooth surface	faccia di dente
mech.eng.	tooth thickness	spessore circolare
mech.eng.	tooth thickness	spessore circolare di un dente
mech.eng.	tooth thickness half angle	semi-angolo di spessore del dente della ruota conica
mech.eng.	tooth tip	spigolo di testa del dente
mech.eng.	tooth trace	linea del fianco
mech.eng.	tooth washer	rondella dentata a ventaglio
transp.	tooth wheel	pignone
transp.	tooth wheel	ruota dentata
environ., nat.res.	toothed whales	capodogli (Physeteridae)
mech.eng.	total error of tooth spacing	errore totale di divisione
mech.eng.	transverse chordal tooth thickness	spessore cordale
mech.eng.	transverse chordal tooth thickness	spessore cordale di un dente
mech.eng.	transverse tooth thickness	spessore circolare di un dente
mech.eng.	transverse tooth thickness	spessore circolare
mech.eng.	transverse tooth thickness	spessore trasversale
med.	unerupted tooth	dente incluso
med.	wall tooth	dente molare (dens molaris)
med.	wang tooth	dente molare (dens molaris)
mech.eng.	whole depth tooth angle	angolo dell'altezza del dente
med.	wisdom tooth	dente della saggezza (dens sapientiae, dens serotinus)
med.	wisdom tooth	terzo molare (dens sapientiae, dens serotinus)
med.	wisdom tooth	dente serotino (dens sapientiae, dens serotinus)
med.	wisdom tooth	dente del giudizio (dens sapientiae, dens serotinus)
mech.eng., construct.	worm wheel tooth pressure	pressione sul dente della ruota elicoidale