Prisotnost in stopnja nagnjenosti drugih stalnih kočnikov na osnovi analize panoramskih rentgenskih posnetkov = Roentgenographic analysis of inclined second molars
Cvetko, Erika ; Skalerič, Uroš, 1945-2023
An absent first molar is a common clinical finding in adult patients. When thefirst molar is lost, the second molar usually tips mesially. Due to its susceptibility to abnormal stresses. bony ...breakdown and pocket formation may occur mesial to the inclined tooth. The purpose of this study was to examine the frequency and degree of inclination of second molars, and to correlate these findings with the incidence of angular bone defects and alveolar bone loss around a tipped tooth. Six hundred panoramic radiographs of unreferred patients were analysed. Alveolar bone loss was measured at the mesial and distal surfaces of second molars. The degree of second molar inclination and the incidence of angular bone defects were determined. Thirty-two percent of maxillary, and 58% of mandibular first molars were missing. Seventy-two per cent of mandibular, and only 9% of maxillary second molars were inclined mesially. The mesial surfaces of the tipped second molars exhibited greater alveolar bone destruction than the distal surfaces. On average, greater resorption of alveolar bone was observed around tipped molars. compared to nontipped ones. Infrabony lesions were more common at mesially tipped molars than at nontipped molars. Tipped molars are considered an aggravating factor for alveolar bone breakdown. Mesial inclination predisposes to greater alveolar bone loss and to the occurrence of angular bony defects at the mesialsurface of the inclined tooth. Orthodontic uprighting of tipped molars, desired from the periodontal and also the prosthetic point of view, could restore occlusion and improve the periodontal prognosis.
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