Objectives: This cross-sectional study aimed to evaluate the
prognosis of spontaneous space closure and occlusion in uncontrolled permanent
lower first molar extractions in patients with different developmental stages. Materials and Methods: Fifty permanent lower first
molar extractions were included in the study. Extractions were divided into two
groups as appropriate-timing (Group 1- 6th or 7th stages of Nolla) and late-timing
(Group 2- 8th or 9th stages of Nolla), according to the Nolla calcification stage
of permanent second molar germs in the same quadrant. In the 24th month, based
on clinical/radiological/photographic data, the success of spontaneous space
closure, rotation degrees of adjacent teeth, and dental midline deviations were
evaluated. Results: Successful spontaneous space closure was observed in 52%
in Group 1, and no successful result was present in Group 2. The difference was
statistically significant (p<0.001). Rotation results of adjacent teeth were
determined more frequently in Group 2, and the difference was not statistically
significant (p=0.138, p=0.084, p=0.120). Dental midline deviations were
statistically significantly higher in unilateral extractions compared to
bilateral extractions (p=0.006).
Conclusions: The timing of permanent lower first molar
extractions for successful spontaneous space closure should be planned at the sixth
or seventh development stage of the permanent lower second molar, according to
Nolla’s classification. Since rotations in adjacent teeth occur regardless of
extraction timing, cases should be followed-up and intervened if necessary. Besides,
unilateral permanent first molar tooth extractions should be avoided as much as
possible since they cause dental midline deviation.
Birincil Dil | İngilizce |
---|---|
Konular | Sağlık Kurumları Yönetimi |
Bölüm | Original Research Articles |
Yazarlar | |
Yayımlanma Tarihi | 5 Ekim 2020 |
Gönderilme Tarihi | 12 Mayıs 2020 |
Yayımlandığı Sayı | Yıl 2020Cilt: 23 Sayı: 3 |
Cumhuriyet Dental Journal (Cumhuriyet Dent J, CDJ) is the official publication of Cumhuriyet University Faculty of Dentistry. CDJ is an international journal dedicated to the latest advancement of dentistry. The aim of this journal is to provide a platform for scientists and academicians all over the world to promote, share, and discuss various new issues and developments in different areas of dentistry. First issue of the Journal of Cumhuriyet University Faculty of Dentistry was published in 1998. In 2010, journal's name was changed as Cumhuriyet Dental Journal. Journal’s publication language is English.
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