Profile changes after conventional and chin shield genioplasty

Area of Science:

• Oral and Maxillofacial Surgery
• Plastic Surgery
• Regenerative Medicine

Background:

• Genioplasty aims to correct chin deformities.
• Conventional genioplasty has limitations in vertical lengthening.
• Chin shield genioplasty is an alternative surgical technique.

Purpose of the Study:

• To compare profile changes between conventional genioplasty and chin shield genioplasty.
• To evaluate the efficacy of hydroxyapatite collagen graft and platelet-rich plasma in chin augmentation.

Main Methods:

• 20 patients with retruded chin were randomized into two groups.
• Experimental group: chin shield osteotomy with hydroxyapatite collagen graft (soaked in platelet-rich plasma).
• Control group: conventional genioplasty. Outcome variables included lip seal, chin thickness, mandibular base length, SNB, labiomental angle, anterior lower facial height, transverse chin shift, and complications.

Main Results:

• Both techniques increased chin thickness.
• Chin shield genioplasty significantly increased anterior lower facial height.
• No significant difference in patient satisfaction scores between groups.

Conclusions:

• Chin shield genioplasty achieves horizontal and vertical chin lengthening without deepening the mentolabial fold.
• Hydroxyapatite collagen bone graft and platelet-rich plasma enhance healing, bone formation, and reduce resorption.
• Chin shield genioplasty is a viable option for chin augmentation with improved vertical dimension.