APICAL ROOT RESORPTION IN TEETH AFTER THE TREATMENT OF CLASS II MALOCCLUSION WITH FORSUS FRD AND FIXED TECHNIQUE

Öz

Aim: To assess apical root resorption (ARR) after Class II malocclusion treatment with the Forsus FRD and fixed technique and to identify the possible risk factors retrospectively. Material and Methods: Seventy-three Class II patients (52 females, 21 males; mean age 14.26±1.28 years) treated with Forsus FRD and fixed technique in the department of Orthodontics were included in this study. The crown and root lengths of 1368 teeth were measured from the panoramic radiographs taken at the beginning and the end of the treatment from these patients. ARR was calculated as the root-crown ratio (RCR) and relative changes of RCR (rRCR). Apical displacement of the incisors was assessed by the superimposition of the lateral cephalograms taken at the beginning and the end of the treatment. Besides, the effect of age, gender, treatment period, tooth type, and apical displacement on ARR was evaluated. Data were statistically analyzed. Results: ARR was detected in 66 (90.41%) patients and 228 (16.67%) teeth. ARR was mild (90≤rRCR<100%) in 181 (13.23%) teeth, moderate (80≤rRCR<90%) in 30 (2.19%) teeth, and severe (rRCR ≤80) in 17 (1.24%) teeth. Severe ARR occurred mostly in the upper central and lateral teeth. A significant negative correlation was found between rRCR and, age and tooth type (p<0.05). Conclusion: Orthodontic treatment of Class II malocclusion with Forsus FRD and fixed technique could lead to mild ARR in the majority of the patients. ARR is mostly seen in the incisor teeth and increases with advanced age. Key Words: Root resorption, orthodontic appliances, malocclusion, Angle Class II SINIF 2 MALOKLÜZYONLARIN FORSUS FRD VE SABİT TEKNİK İLE TEDAVİSİ SONRASINDA DİŞLERDE GELİŞEN APİKAL KÖK REZORPSİYONU Öz Amaç: Forsus FRD ve sabit teknik ile tedavi edilen Sınıf 2 maloklüzyonların, tedavi sonrası apikal kök rezorpsiyonunun (AKR) incelenmesi ve olası risk faktörlerinin retrospektif olarak tanımlanmasıdır. Gereç ve Yöntem: Bu çalışmaya Ortodonti Anabilim Dalı’nda Forsus FRD ve sabit teknik ile tedavi edilmiş olan Sınıf 2 maloklüzyona sahip 73 hasta (52 kadın; 21 erkek; yaş ortalaması 14.26±1.28) dahil edildi. Bu hastaların, tedavi öncesinde ve tedavi sonrasında çekilen panoramik radyograflarından 1368 dişin, kron ve kök uzunlukları ölçüldü. AKR, kök-kron oranı (RCR) ve RCR’nin bağıl değişkenleri (rRCR) olarak hesaplandı. Tedavi öncesi ve tedavi sonrasında alınan lateral sefalogramların çakıştırılması ile kesici dişlerin apikal yöndeki yer değiştirmesi değerlendirildi. Bunlara ilave olarak, yaş, cinsiyet, tedavi süresi, diş tipi ve apikal yer değiştirmenin AKR’ye etkisi incelendi. Veriler istatistiksel olarak analiz edildi. Bulgular: Altmış altı hastada (%90.41) ve 228 dişte (%16.67) AKR saptandı. AKR, 181 (%13.23) dişte hafif (90≤rRCR<100%), 30 (%2.19) dişte orta (80≤rRCR<90%) ve 17 (%1.24) dişte şiddetli (rRCR ≤80) düzeydeydi. Şiddetli AKR en fazla üst santral ve lateral dişlerde görüldü. rRCR’nin yaş ve diş tipi ile anlamlı düzeyde negatif yönde ilişki gösterdiği belirlendi (p<0.05). Sonuç: Sınıf 2 maloklüzyonların Forsus FRD ve sabit tedavi ile yapılan ortodontik tedavisi, birçok hastada hafif düzeyde AKR’ye neden olabilmektedir. AKR, çoğunlukla kesici dişlerde görülmektedir ve yaşın ilerlemesiyle birlikte artmaktadır. Anahtar Kelimeler: Kök rezorpsiyonu, ortodontik gereçler, maloklüzyon, Angle Sınıf 2

Anahtar Kelimeler

• Root resorption
• orthodontic appliances
• malocclusion
• Angle Class II

APICAL ROOT RESORPTION IN TEETH AFTER THE TREATMENT OF CLASS II MALOCCLUSION WITH FORSUS FRD AND FIXED TECHNIQUE

Öz

ABSTRACT Aim: To assess apical root resorption (ARR) after Class II malocclusion treatment with the Forsus FRD and fixed technique and to identify the possible risk factors retrospectively. Material and Methods: Seventy-three Class II patients (52 females, 21 males; mean age 14.26±1.28 years) treated with Forsus FRD and fixed technique in the department of Orthodontics were included in this study. The crown and root lengths of 1368 teeth were measured from the panoramic radiographs taken at the beginning and the end of the treatment from these patients. ARR was calculated as the root-crown ratio (RCR) and relative changes of RCR (rRCR). Apical displacement of the incisors was assessed by the superimposition of the lateral cephalograms taken at the beginning and the end of the treatment. Besides, the effect of age, gender, treatment period, tooth type, and apical displacement on ARR was evaluated. Data were statistically analyzed. Results: ARR was detected in 66 (90.41%) patients and 228 (16.67%) teeth. ARR was mild (90≤rRCR<100%) in 181 (13.23%) teeth, moderate (80≤rRCR<90%) in 30 (2.19%) teeth, and severe (rRCR ≤80) in 17 (1.24%) teeth. Severe ARR occurred mostly in the upper central and lateral teeth. A significant negative correlation was found between rRCR and, age and tooth type (p<0.05). Conclusion: Orthodontic treatment of Class II malocclusion with Forsus FRD and fixed technique could lead to mild ARR in the majority of the patients. ARR is mostly seen in the incisor teeth and increases with advanced age. Key Words: Root resorption, orthodontic appliances, malocclusion, Angle Class II SINIF 2 MALOKLÜZYONLARIN FORSUS FRD VE SABİT TEKNİK İLE TEDAVİSİ SONRASINDA DİŞLERDE GELİŞEN APİKAL KÖK REZORPSİYONU Öz Amaç: Forsus FRD ve sabit teknik ile tedavi edilen Sınıf 2 maloklüzyonların, tedavi sonrası apikal kök rezorpsiyonunun (AKR) incelenmesi ve olası risk faktörlerinin retrospektif olarak tanımlanmasıdır. Gereç ve Yöntem: Bu çalışmaya Ortodonti Anabilim Dalı’nda Forsus FRD ve sabit teknik ile tedavi edilmiş olan Sınıf 2 maloklüzyona sahip 73 hasta (52 kadın; 21 erkek; yaş ortalaması 14.26±1.28) dahil edildi. Bu hastaların, tedavi öncesinde ve tedavi sonrasında çekilen panoramik radyograflarından 1368 dişin, kron ve kök uzunlukları ölçüldü. AKR, kök-kron oranı (RCR) ve RCR’nin bağıl değişkenleri (rRCR) olarak hesaplandı. Tedavi öncesi ve tedavi sonrasında alınan lateral sefalogramların çakıştırılması ile kesici dişlerin apikal yöndeki yer değiştirmesi değerlendirildi. Bunlara ilave olarak, yaş, cinsiyet, tedavi süresi, diş tipi ve apikal yer değiştirmenin AKR’ye etkisi incelendi. Veriler istatistiksel olarak analiz edildi. Bulgular: Altmış altı hastada (%90.41) ve 228 dişte (%16.67) AKR saptandı. AKR, 181 (%13.23) dişte hafif (90≤rRCR<100%), 30 (%2.19) dişte orta (80≤rRCR<90%) ve 17 (%1.24) dişte şiddetli (rRCR ≤80) düzeydeydi. Şiddetli AKR en fazla üst santral ve lateral dişlerde görüldü. rRCR’nin yaş ve diş tipi ile anlamlı düzeyde negatif yönde ilişki gösterdiği belirlendi (p<0.05). Sonuç: Sınıf 2 maloklüzyonların Forsus FRD ve sabit tedavi ile yapılan ortodontik tedavisi, birçok hastada hafif düzeyde AKR’ye neden olabilmektedir. AKR, çoğunlukla kesici dişlerde görülmektedir ve yaşın ilerlemesiyle birlikte artmaktadır. Anahtar Kelimeler: Kök rezorpsiyonu, ortodontik gereçler, maloklüzyon, Angle Sınıf 2

Anahtar Kelimeler

• Root resorption
• orthodontic appliances
• malocclusion
• Angle Class II

Kaynakça

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