Objectives: The aim was to compare the alveolar bone
support of mandibular central incisors in subjects with Class III and Class I
skeletal patterns using cone-beam computed tomography (CBCT).
Materials and Methods: Group 1 included 20 patients (mean
age=19.78±2.80) with Class III malocclusion (mean ANB°=-2.77±3.69),
mesofacial growth pattern (FMA°=27.03 ±5.11) and lingual-inclined mandibular
incisors (IMPA°<85). Group 2 included 20 patients (mean age=20.85±3.97) with Class I malocclusion (mean ANB°=2.94 ±1.46), mesofacial growth pattern (FMA°=25.67±6.83) and normal inclined mandibular incisors
(85<IMPA°<95).
Vertical alveolar bone level and alveolar bone thickness (ABT) of total 80
mandibular central incisors (40 from each group) were evaluated. Buccal,
lingual and total ABT were measured at the crestal, midroot, and apical levels.
Buccal (BACH) and lingual (LACH) alveolar crestal heights were also evaluated. Mann-Whitney U, independent samples-t-tests,
and Spearman’s rank correlation analysis were applied for statistical analysis.
Results: The lingual ABT at the crestal and
midroot level, buccal ABT at the apical level, and total ABT at all levels were
significantly lower in Group 1 than Group 2 (p<0.05). There was a negative
correlation between the buccal (r=-0.324; p=0.042) ABT at the apical level and
mandibular plane angle. The change in mandibular incisor inclination was positively
correlated with buccal ABT at the apical level (r=0.463; p=0.003) and lingual
ABT at the crestal level (r=0.550;p<0.001). BACH was significantly higher in
Group 1 (2.21±1.48 mm) compared to Group 2
(1.42±0.17 mm) (p < 0.05).
Conclusions: In subjects with Class III deformities,
mandibular central incisors have less bone support especially at the buccal
side of the alveolar bone at the apical level and lingual side of the alveolar
bone at the crestal and midroot levels. Rate of change in mandibular incisor
inclination and mandibular plane angle can be thought as significant factors
that may influence alveolar bone thickness.
Amaç:
Bu çalışmanın amacı, konik ışınlı bilgisayarlı tomografi (KIBT) kullanılarak
iskeletsel Sınıf III ve Sınıf I malokluzyonlu bireylerde mandibuler santral
keserlerin etrafındaki alveolar kemik desteğini değerlendirmek ve
karşılaştırmaktır.
Materyal
ve Metod: Grup 1, İskeletsel Sınıf III
malokluzyona (ortalama ANB°=
-2,77±3,69), mezofasiyal büyüme yönüne (FMA°=27,03 ±5,11) ve linguale eğimli
mandibuler keserlere (IMPA°<85) sahip olan 20 hastadan (ortalama yaş=19,78±2,80
yıl) oluşmaktadır. Grup 2, İskeletsel Sınıf I malokluzyona (ortalama ANB°=
2,94 ±1,46), mezofasiyal büyüme yönüne (FMA°=25,67±6,83)
ve normal eğimli mandibuler keserlere (85<IMPA°<95) sahip olan 20
hastadan (ortalama yaş=20,85±3,97)
oluşmaktadır. Toplam 80 mandibuler santral keser dişin (her bir gruptan 40 diş)
görüntüleri kullanılarak vertikal alveolar kemik yüksekliği ve alveolar kemik
kalınlığı (AKK) ölçülmüştür. Bukkal, lingual ve total AKK; krestal, kök ortası
ve apikal seviyelerde ölçülmüştür. Bukkal (BAKY) ve lingual (LAKY) alveolar
krestal yükseklikler de değerlendirilmiştir. İstatistiksel analiz için
Mann-Whitney U, bağımsız örneklem-t-testleri ve Pearson korelasyon
analizi uygulanmıştır.
Bulgular: Krestal ve
orta kök seviyesinde lingual AKK; apikal seviyede bukkal AKK; ve tüm
seviyelerde total AKK Grup 1’de Grup 2’ye göre anlamlı şekilde daha az
bulunmuştur (p<0,05). Apikal seviyede bukkal AKK (r=-0,324; p=0,042)
ve mandibuler düzlem açısı arasında negatif korelasyon bulunmuştur. Mandibuler
keser eğimindeki değişim apikal seviyedeki bukkal AKK (r=0,463; p=0,003) ve
krestal seviyedeki lingual AKK (r=0,550; p<0,001) ile pozitif korelasyon
göstermiştir. BAKY, Grup 1’de (2,21±1,48 mm) Grup
2’ye (1,42±0,17 mm) göre
anlamlı şekilde yüksek bulunmuştur (p<0,05).
Sonuçlar:
Sınıf III deformitesi olan bireylerde, mandibuler santral keser dişler
özellikle apikal seviyede alveolar kemiğin bukkal tarafında ve krestal ve kök
orta seviyelerinde ise alveolar kemiğin lingual tarafında daha az kemik
desteğine sahiptir. Mandibuler keser eğiminde ve mandibular düzlem açısındaki
değişim oranı, alveoler kemik kalınlığını etkileyebilecek önemli faktörler
olarak düşünülebilir.
Primary Language | English |
---|---|
Subjects | Health Care Administration |
Journal Section | Original Research Articles |
Authors | |
Publication Date | October 17, 2018 |
Submission Date | March 16, 2018 |
Published in Issue | Year 2018Volume: 21 Issue: 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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