EVALUATION OF TREATMENT RESULTS AND STABILITY IN PATIENTS WITH ANTERIOR OPEN BITE TREATED BY PREMOLAR EXTRACTIONS OR MINI-IMPLANT ANCHORED INTRUSION

ABSTRACT Aim: The aim of this study was to compare the treatment results and stability of open bite treatment achieved via intrusion of posterior teeth and extraction of 1st premolars Material and Methods: This study was conducted on pretreatment (T1), posttreatment (T2) and follow-up (T3) cephalograms of 28 patients who received open bite treatment. 14 patients (mean age 14.61±0.87) were treated with the extraction of the 1st premolar (extraction group: EG) while 14 patients (mean age 15.06±1.05) had bite closure via intrusion of the posterior teeth using mini-implants (mini-implant group: MG). The mean follow-up periods in EG and MG were 3.32±1.25 (range, 2.10-6.20) and 2.74±0.77 years (range, 2.05-4.34), respectively. Results: At T2, SNB increased and SNGoGn decreased significantly in MG, with significant intergroup difference (p<0.05). Maxillary and mandibular incisors extruded significantly in both groups, with greater amounts in EG (p<0.05). Maxillary and mandibular incisors’ inclinations decreased significantly in EG, with a significant intergroup difference (p<0.05). Maxillary posterior teeth intruded significantly in MG, with a significant intergroup difference (p<0.05). At T3, significant intrusion of upper incisors and extrusion of posterior teeth were observed in EG and MG, respectively, and these measurements showed significant intergroup differences (p<0.05). Decreases in overbite were significant in both groups, with no intergroup difference. The clinically significant relaps rates were 7.14% (1 patient) and 14.28% (2 patients) in MG and EG, respectively. Conclusion: Even though mini-implant supported intrusion and extraction therapy achieved bite closure via different treatment effects, both groups showed similar relaps tendencies at the follow-up. Keywords: open bite, tooth extraction, tooth intrusion PREMOLAR ÇEKİMLERİ VEYA MİNİ VİDA DESTEKLİ İNTRÜZYON İLE TEDAVİ EDİLMİŞ ÖN AÇIK KAPANIŞLI HASTALARDA TEDAVİ SONUÇLARININ VE STABİLİTENİN DEĞERLENDİRİLMESİ ÖZ Amaç: Bu çalışmanın amacı 1. Premolar çekimi ve maksiller posterior dişlerin intrüzyonu ile gerçekleştirilen açık kapanış tedavilerinin sonuç ve stabilitesinin karşılaştırılmasıdır. Gereç ve Yöntem: Bu çalışma açık kapanış tedavisi gören 28 hastanın tedavi öncesi (T1), tedavi sonrası (T2) ve takip (T3) sefalometrik röntgenleri üzerinde yürütüldü. 14 hastada (ortalama yaş 14.61±0.87) 1. Premolar çekimli konvensiyonel ortodontik tedavi uygulanırken, 14 hastanın (15.06±1.05) tedavisi posterior dişlerin intrüzyonu ile yapıldı. Çekim ve mini-implant gruplarında ortalama takip zamanları sırası ile 3.32±1.25 ve 2.74±0.77 yıldı. Bulgular: Tedavi sonunda mini-implant grubunda, SNB açısındaki artış ve SNGoGn açısındaki azalma önemli bulundu (p<0.05). Bu ölçümler bakımından gruplar arasındaki fark da önem bulundu (p<0.05). Maksiller ve mandibular kesici dişler çekim grubunda daha fazla olmak üzere her iki grupta da önemli ekstrüzyon gösterdi (p<0.05). Tedavi sonunda gruplar arasında önemli bir fark ile, mini-implant grubunda maksiller posterior dişlerin intrüzyonu önemli bulundu (p<0.05). T3 döneminde, çekim grubunda üst keserlerde önemli intrüzyon gözlemlenirken, mini-implant grubunda posterior dişlerin ekstüzyonu önemli bulundu ve bu değerler bakımından gruplar arasındaki farklar da önem çıktı (p<0.05). T3’de saptanan overbite miktarındaki azalmalar her iki grupta da önemli bulunurken (p<0.05), gruplar arsındaki fark önemsizdi (p>0.05). Klinik olarak önemli relaps oranları mini-implant ve çekim gruplarında sırası ile %7.14 (1 kişi) ve %14.28 (2 kişi) olarak belirlendi. Sonuç: Mini-implantlarla intrüzyon ve çekimli tedaviler farklı yollarla açık kapanışın tedavinde başarılı olsa da, her iki grubun takip sürecinde relaps eğilimleri benzer bulunmuştur. Anahtar Kelimeler: açık kapanış, diş çekimi, diş gömülmesi

Anahtar Kelimeler:

open bite, tooth extraction

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