Author/Editor		Potočnik, I; Štamfelj, I; Gašperšič, D
Title		Ageneza tretjega kočnika pri prebivalcih Slovenije z vidika načrtnega uničenja ali odstranitve njegovega zametka
Translated title		Agenesis of the third molar in Slovene population in the light of prophylactic destruction or removal of its germ
Type		članek
Source		Zobozdrav Vestn
Vol. and No.		Letnik 60, št. 1-2
Publication year		2005
Volume		str. 57-65
Language		slo
Abstract		Background and purpose: The frequency of third molar agenesis is an indicator of the magnitude of clinical problems caused by this tooth. We have studied the frequency of third molar agenesis in the contemporary population of Slovenia and evaluated the procedure for radiographic detection of this tooth, which forms the basis for prophylactic destruction or removal of its germ. Material and methods: Panoramic radiographs from 320 dental patients aged 12-21 years were evaluated for the presence of third molars. Panoramic radiographs from 30 patients taken between ages 5 and 21 years were used to assess the developmental timing of this tooth. Results: Agenesis of one or more third molar teeth was present in 26.6% of patients. Absence of two third molars was the most frequent, followed in decreasing order of frequency by absence of one, three and all four third molars. No statistically significant diffrences were found between men and women, between upper and lower jaws, or between left and right sides. The earliest appearance of the third molar was found in the 6th year, the latest in the 13th year. Conclusions: The frequency of third molar agenesis in the contemporary population of Slovenia is comparable to the levels reported by most foreign authors. Intentional therapeutic agenesis of third molars seems questionable from the point of view of radiographic diagnosis: radiographic assessments should begin at the latest in the 6th year and continue until the 15th or 16th year of age; moreover, radiographs should be obtained at intervals of 6 months.
Summary		Izhodišče in namen: Pogostost ageneze tretjega kočnika je eden od kazalcev obsežnosti kliničnih težav, ki jih ta zob povzroča. Pri današnjih prebivalcih Slovenije smo zato ugotavljali pogostost ageneze tretjega kočnika in osvetiili rentgensko odkrivanje prisotnosti tega zoba v zvezi z njegovim načrtnim uničenjem ali odstranitvijo. Material in metoda: Prisotnost tretjega kočnika smo ugotavljali na 320 ortopantomogramih bolnikov, starih od 12 do 21 let. Pri 30 bolnikih smo na ortopantomogramih, narejenih v starosti od 5. do 21. leta, ugotavljali tudi časovni potek razvoja tega zoba. Izsledki: Pogostost ageneze tretjega kočnika je bila 26,6 %, največkrat sta manjkala dva, nato eden, trije in najmanjkrat vsi tretji kočniki. Pogostost pri moških in ženskah, v zgornji in spodnji čeljusti ter na levi in desni strani se ni razlikovala statistično značilno. Najzgodnejši pojav tretjega kočnika je bil v 6. letu starosti, najpoznejši v 13. letu. Sklepi: Pogostost ageneze tretjega kočnika pri prebivalcih Slovenije sodi v okvir vrednosti, ki jih je ugotovila večina tujih avtorjev. Načrtno uničenje ali odstranitev zametka tretjega kočnika je z rentgenskodiagnostičnega stališča vprašljivo, ker bi bilo potrebno rentgensko slikanje pričeti najpozneje v 6. letu otrokove starosti in ga ponavljati do 15. ali 16. leta, poleg tega bi bilo potrebno polletno slikanje.
Descriptors		TOOTH, IMPACTED MOLAR, THIRD TOOTH GERM TOOTH EXTRACTION