Journals / Cumhuriyet Dental Journal / 2021 / Cilt: 24 - Sayı: 2

SOFT TISSUE RESPONSE AFTER MAXILLARY STEP SURGERY WITH OR WITHOUT ANS REDUCTION

Pages
121–128
Publication Date
2022-10-11
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The subnasal region is relatively less affected.

📌 3 Key Takeaways

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Objective & Hypothesis:Objectives: Prediction of the soft tissue profile is an important part of orthognathic surgery planning.
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Key Findings & Data:Materials and Methods: A total of 24 patients (17 women, 7 men) who underwent maxillary advancement and mandibular set back surgery using maxillary step and bilateral sagittal split ramus osteotomy techniques were included in the study.
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Conclusion & Impact:The subnasal region is relatively less affected.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Objectives: Prediction of the soft tissue profile is an important part of orthognathic surgery planning. Variations in surgical techniques can affect soft tissue response. The current study aimed to determine the effects of maxillary step osteotomy with or without anterior nasal spine (ANS) reduction on the soft tissue response. Materials and Methods: A total of 24 patients (17 women, 7 men) who underwent maxillary advancement and mandibular set back surgery using maxillary step and bilateral sagittal split ramus osteotomy techniques were included in the study. Then two subgroups were created as ANS reduction positive group (ANSR+) and negative group (ANSR-). Cinch suture and V-Y closure techniques were used in all patients. The lateral cephalometric radiographs which had taken preoperatively and 6-8 months after surgery were recruited. Soft and hard tissue changes were evaluated by using paired samples T-test. Pearson correlation test was used to determine the correlation between hard and soft tissue movements. Results: Maxillary soft to hard tissue ratios of the ANSR+ group were lower than those in the ANSR- group. The ratios were Pr/ANS: 6% vs 49%, Pr/A: 16% vs 42%, Sn/A: 52% vs 66%, Ls/U1: 31% vs 78%, in ANSR+ and ANSR- groups, respectively. Conclusions: The maxillary step osteotomy technique may be useful in patients where it is desired to further support the nose tip in an anterior direction. ANS reduction process causes a quite decrease in the soft tissue response of the tip of the nose and the upper lip. The subnasal region is relatively less affected.

Özet

Amaç: Yumuşak doku profilinin tahmini, ortognatik cerrahi planlamanın önemli bir parçasıdır. Cerrahi tekniklerdeki değişiklikler yumuşak doku yanıtını etkileyebilir. Bu çalışma, anterior nasal spina (ANS) redüksiyonlu veya redüksiyonsuz basamaklı maksiller osteotominin yumuşak doku yanıtı üzerindeki etkilerini belirlemeyi amaçlamıştır. Gereç ve Yöntemler: Çalışmaya basamaklı maksiller osteotomi ve bilateral sagittal split ramus osteotomisi kullanılarak, maksiller ilerletme ve mandibular geri alma cerrahisi uygulanan toplam 24 hasta (17 kadın, 7 erkek) dâhil edildi. Daha sonra ANS redüksiyon pozitif (ANSR+) ve negatif grup (ANSR-) olmak üzere iki alt grup oluşturuldu. Tüm hastalarda chin sütür ve V-Y kapama teknikleri kullanılmıştır. Ameliyat öncesi ve ameliyattan 6-8 ay sonra alınan lateral sefalometrik radyografiler arşivden toplandı. Yumuşak ve sert doku değişiklikleri, eşleştirilmiş T-testi kullanılarak değerlendirildi. Sert ve yumuşak doku hareketleri arasındaki korelasyonu belirlemek için Pearson korelasyon testi kullanıldı. Bulgular: ANSR+ grubunun maksiller yumuşak/sert doku oranları ANSR- grubundan daha düşüktü. ANSR+ ve ANSR- gruplarında oranlar Pr/ANS:% 6'ya karşı % 49, Pr/A:% 16'ya karşı % 42, Sn/A:% 52'ye karşı % 66, Ls/ U1:% 31'e karşı % 78 olarak bulunmuştur. Sonuçlar: Basamaklı maksiller osteotomi tekniği, burun ucunun anterior yönde daha fazla desteklenmesinin istendiği hastalarda faydalı olabilir. ANS redüksiyon işlemi, burun ucu ve üst dudağın yumuşak doku yanıtında azalmaya neden olur. Subnazal bölge nispeten daha az etkilenir.

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Cite This Article

İzgi, N., Akbulut, S., Akbulut, N. (2022). SOFT TISSUE RESPONSE AFTER MAXILLARY STEP SURGERY WITH OR WITHOUT ANS REDUCTION. Cumhuriyet Dental Journal, Cilt: 24 - Sayı: 2, 121–128. https://ajindex.com/articles/476896

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