The Nasal Changes Affected by Different Alar Base Suture Techniques After Maxillary LeFort I Osteotomy

The Nasal Changes Affected by 2 Different Alar Base Suture Techniques After Maxillary LeFort I Osteotomy--A Randomized Controlled Trial

study hypothesis

1. The aim of this study:

   How can the investigators predict and control the nasal changes after maxillary LeFort I osteotomy with 2 different alar base suture techniques ?

2. Study hypothesis

   • Null hypothesis: Nasal changes were not affected by 2 different alar base suture techniques after maxillary LeFort I osteotomy
   • Alternative : Nasal changes were affected by 2 different alar base suture techniques after maxillary LeFort I osteotomy

Background and study purpose:

Patients who received maxillary LeFort I osteotomy often complained about their nose become wider and more nostril show after surgery. According the the literature review, the conventional and modified alar base cinch technique both could control the interalar width. However, there is no long term result show which technique is superior to the other. Therefore, in order to improve patients' nasal and midfacial esthetics after the surgery, this study is to evaluate how the nasal changes affected by 2 different alar base cinch suture and which technique could result in a more positive effect.

Inclusion Criteria:

• Taiwanese patients who received LeFort I osteotomy at CGMH during 2011-2012
• No previous craniofacial surgery
• Patients agreed to attend this study and willing to sign the agreement
• Patients who are elder than 18 years old and after growth completion

Exclusion Criteria:

• Craniofacial anomalies
• cleft lip and /or palate patients
• patients without all the documents
• patients do not receive combined correcting nasolabial shape and orthognathic surgery.