Comparison and Evaluation of Alveolar Bone Around Lower Central Incisors in Class III and Class I Patients

Ezgi Atik; Hande Gorucu-coskuner; Tülin Taner

doi:10.7126/cumudj.406846

EN TR

Comparison and Evaluation of Alveolar Bone Around Lower Central Incisors in Class III and Class I Patients

Abstract

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.

Keywords

Class III,alveolar bone,CBCT evaluation

İskeletsel Sınıf III ve Sınıf I Bireylerin Alt Santral Kesici Dişlerinin Etrafındaki Alveolar Kemiğin Karşılaştırılması ve Değerlendirilmesi

Öz

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.

Anahtar Kelimeler

Sınıf III,alveolar kemik,KIBT incelemesi

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Details

Primary Language

English

Subjects

Health Care Administration

Journal Section

Research Article

Authors

Ezgi Atik ^*
Department of Orthodontics, Faculty of Dentistry, Hacettepe University
Türkiye

Hande Gorucu-coskuner
Department of Orthodontics, Faculty of Dentistry, Hacettepe University
Türkiye

Tülin Taner
Department of Orthodontics, Faculty of Dentistry, Hacettepe University
Türkiye

Publication Date

October 17, 2018

Submission Date

March 16, 2018

Acceptance Date

July 26, 2018

Published in Issue

Year 1970 Volume: 21 Number: 3

DOI

https://doi.org/10.7126/cumudj.406846

IZ

https://izlik.org/JA43UE44KP

Cite

RIS / Bibtex

EndNote

Atik E, Gorucu-coskuner H, Taner T (October 1, 2018) Comparison and Evaluation of Alveolar Bone Around Lower Central Incisors in Class III and Class I Patients. Cumhuriyet Dental Journal 21 3 239–248.