The frequency of occurrence of iatrogenic damage to the contact surfaces of the lateral teeth in orthopedic treatment with fixed structures
Iatrogenic damage to the contact surfaces of the posterior teeth adjacent to the prepared ones is still an urgent problem. Despite the long period of studying this issue, only a few specialists are aware of the significance of the problem, namely, the occurrence of a carious process in the area of damage. The aim of this study is to assess the incidence of iatrogenic damage to the proximal surfaces of the posterior teeth adjacent to the teeth prepared for orthopedic fixed structures. Dismountable plaster models with bottom sawing were studied. The subject of the study was the proximal surfaces of the posterior teeth adjacent to the preparation area. The research results were entered into a special register. Damage assessment was carried out on the jaws, on the sides and along the proximal surfaces of the posterior teeth adjacent to the preparation area. The damage was also assessed by the nature and method of preparation of the teeth adjacent to the damaged teeth. According to the data obtained, more frequent damage to the posterior teeth of the upper jaw is evident (p<0,0001). The lateral teeth on the left side are statistically significant (p<0,05) more often damaged at the time of preparation than on the right. Iatrogenic injuries to the distal proximal surfaces of premolars were more frequent (p<0,0001) than to the mesial ones, while in molars, on the contrary, there was a more frequent damage to the mesial surfaces. The mesial surfaces of molars were statistically significant (p<0,001) more often damaged than in premolars, while in premolars, on the contrary, damage to the distal surfaces compared to molars prevailed much more often (p<0,001). The analysis of the data showed a statistically significant (p<0,0001) dominance of smoothed iatrogenic lesions in comparison with gross lesions in premolars. The data obtained show that both premolars and molars show a statistically significant (p<0,0001) greater damage to the proximal surfaces of the teeth adjacent to the prepared teeth with a shoulder compared to the tangential preparation.