Profesional Dental Abrasion Notches

Prema postavljenoj zadaći, metodom slučajnog odabira pregledani su zubi 413 radnika u tekstilnoj tvornici s ciljem da se otkrije pojava profesionalnih uzura vezanih za tehnologiju rada. Od pregledanih, 40,6% (168) povremeno je ili stalno prekidalo konac zubima, a ne škarama kako je predviđeno tehnološkim procesom. Uzure su otkrivene samo u radnika koji su konac pre kidali zubima (P < 0,01). Nađene su kod 10,9% svih ispitanika (413), to jest kod 26,8% (45) ispitanika koji su konac prekidali zubima. Uzure su nastale pretežito na gornjim sjekutićima, a po izgledu su klinaste, ovalne ili kombinirane. Po stupnju istrošenosti zuba, prema TW1, zahvatile su samo caklinu, osim jednog slučaja gdje su doprle do dentina. Na nastanak uzura djelovala je dugotrajnost mehaničkog oštećenja zuba (Q - 0,45), vrsta konca (Q - 0,55), i neobavještenost radnika o mogućem štetnom djelovanju loših radnih navika na zub.A cohort of 413 textile industry workers were randomly chose to assess the presence of professional abrasion notches (dental fissures) as a result of manufacture technology. It was found that 168 (4.06%) examined workers temporarily or permanently bite the thread instead of cutting it by the scissors during the working process, as regulated by the technological process. Dental fissures were only detected in the workers reporting to bite the thread (P<0.01). So, dental fissures were found in 45 (10.9%) out of the total of 413 subjects examined, and in 26.8% of those using their teeth to bite the thread (N=45).The occurrence of dental fissures was found to be related to the duration of tooth exposure to stress (Q-0.45), thread quality (Q=0.55) and misinterpretation of the problem by the workers

Mechanical and Chemical Tooth Wear - a Review

Dan je pregled današnjih spoznaja o mehaničkom i kemijskom trošenju zuba i dentalnih ispuna te o povezanosti atricijsko-abrazijsko-erozijskih djelovanja u svjetlu tribologijske znanosti i naših kliničkih iskustava. Navedeni su unutarnji i vanjski uzroci nastalih defekata, njihov odnos prema kliničkoj slici s posebnim osvrtom na kliničke manifestacije subkliničkih erozija cakline i dentina. Navedeni su neki od indeksa za kliničku klasifikaciju potrošenoga zuba i nove tehnologije koje se rabe u znanstvenom istraživanju te problematike.A review is given o f the present state o f art on mechanical and chemical wearing away o f teeth and dental fillings, and on the relationship between the effects o f attrition, abrasion and erosion in the light of tribology and our own clinical experience. Endogenous and exogenous causes o f defects, as well as their relation with the clinical picture are presented, with particular reference to clinical manifestation of subclinical enamel and dentin erosions. Some indices for clinical classification of tooth wear and new relevant research technologies are described