Izvorni znanstveni članak
[Dilaceratio radicis - Analysis and Complementation of its Etiology]
Vladimir Lapter
; Zavod za ortodonciju, Stomatološki fakultet, Zagreb
Asja Miličić
; Zavod za ortodonciju, Stomatološki fakultet, Zagreb
Sažetak
The etiology of dilacerafcion of the root has formed the subject of numerous studies quoted in the introduction. Our investigations were performed with the aim of detecting unknown and verifying known etiologic factors in the dilaceration of the root of milk teeth and deciduous 'teeth. The examined subjects were divided into two igroups; 'the first group comprised patients who had begun treatment in 1966. Analysis of a total of 567 X-ray pictures revealed 59 cases of pathologic deformation of the root, 55 of these in the upper jaw and 4 in the lower. The incidence was highest in the first premolar and either 'incisor in the upper jaw. Twelve cases were selected from this group and described, case 2 and 6 confirm the statements of the abovementioned authors, cases 1, 4, 3, and 5 indicate the cited etiologic moments, but in combined form; cases 7, 8, 10 and 12 demonstrate new etiologic moments which had not been cited, case 9 remained unexplained etiologically and case 12 showed negative findings. In the control group, a total of 300 roentgenograms were taken by random choice in fifty children in the age group of 7 to 9 years. The negative findings correlate with the discused term of dental eruption and maturation. 14 cases of dentitio tardae and 14 cases of dentitio praecox were registered. The authors have stated in conclusion: — that the incidence of dilaceratio is higher in the upper, jaw, — that the greatest number of cases of dilaceration in the author's case material pertained to the first premolar and both incisors, — that etilogic factors often occur in combination, — that protracted parafunction, expansion pressure from the radicular cyst, overloading of the tooth which carries a bridge and resistence of the median suture at therapeutic mesialization can be counted among the new etilogic moments, — that changes im the form of the root are the more marked the more extensive the noxa and the earlier the developmental stage of the teeth, — that the time interval elaipsed from the effect of the noxa to the collecting of data represents a minus in an analysis of this type, and finally, — that there exists a marked temporal predisposition when the examined changes in teeth can take place.
Ključne riječi
Hrčak ID:
109152
URI
Datum izdavanja:
15.12.1966.
Posjeta: 1.458 *