Chin augmentation with a bone graft from the mandibular region

Reliability and Validity Evaluation of the Chin Augmentation With Medpor Using FACE-Q Scales Effectiveness

BACKGROUND

Chin augmentation (CA) is important treatment modality for microgenia. The use of implantable alloplastic biomaterials in CA grows in popularity, and there is no verifiable documentation of patients' satisfaction about CA with Medpor (CAWM) exists in the literature, this study examined effectiveness of CAWM by analyzing patient satisfaction.

METHODS

Patients had undergone CAWM were followed up postoperatively. Occurrence of complications was collected, patients' satisfactions with chin shape and surgical decision were analyzed using FACE-Q scales, the reliability of operation was studied through analyzing the statistics, and the influences of sex and follow-up time on satisfaction were compared.

RESULTS

One hundred ten patients who had undergone CAWM received FACE-Q scales and 64 valid questionnaires were collected. 61 (95.3%) showed high satisfaction with chin shape after CAWM (Cronbach α coefficients were all above 0.8), the median values of satisfaction of chin shape and decision making were 85 (67, 100) and 100 (75,100), respectively. The median chin satisfactions of females and males were 87 (67, 100), 79 (61,100). The median chin satisfactions of patients had surgery before 2 years ago and within 2 years were 81 (67, 100), 87 (64,100), respectively. During the follow-up, among 110, 1 (0.91%) developed graft-related infection and 1 (0.91%) developed an allergic reaction, 1 (0.91%) underwent prosthesis removal because dissatisfaction with chin shape.

CONCLUSIONS

Chin augmentation with prothesis is a safe and efficacious way to improve microgenia. Medpor is the desired implant material with less infection, displacement and bone absorption, which is worthy of promotion and further study in CA surgery.

Augmentation Genioplasty Using a Third Molar as a Bone Graft: An Alternative Surgical Technique

PURPOSE

Augmentation genioplasty corrects vertical chin deficiency. To stabilize the synthesis and to allow ossification, a biomaterial prop is necessary. Third molars are frequently removed during orthognathic surgery and provides good material used as autogenous grafts.

SURGICAL TECHNIQUE

This article describes the surgical technique of an augmentation genioplasty using a third molar as a prop biomaterial. Results are stable in time. This technique presents no risk of infection and is less invasive than other autogenous bone graft.

CONCLUSIONS

third molar can be used as a prop biomaterial in augmentation genioplasty.

Simultaneous chin onlay bone graft using elongated coronoid in the treatment of temporomandibular joint ankylosis

Temporomandibular joint (TMJ) ankylosis is a disabling condition that causes problems in mastication, digestion, speech, appearance, and hygiene. Treatment goals are to restore the joint function, to improve facial appearance, and to reestablish harmony among them. To achieve these goals, various strategies have been reported as 1-stage or multistage protocols. We describe a novel method to augment the chin structure with elongated coronoid process of the mandible, which is a sequence of TMJ ankylosis. By this 1-stage treatment that includes gap arthroplasty with interpositional temporalis fascia graft and chin augmentation with autogenous bone graft (elongated coronoid), functional disability and facial deformity of the patient with TMJ ankylosis were improved simultaneously.

The medial surface of the mandible as an alternative source of bone grafts in orthognathic surgery

A technique of harvesting bone grafts from the medial surface of the angle of the mandible during a bilateral sagittal split osteotomy procedure is described. In 20 patients who underwent mandibular setback for the correction of class III dentofacial deformities, bone grafts were harvested from the medial mandibular angle and used for simultaneous augmentation of the midface or for interpositioning and stabilization of the maxilla after LeFort I maxillary anterior or inferior repositioning. The mean postoperative follow-up was 6 months (range, 3-12 months). No complications occurred, and postoperative morbidity was similar to that encountered by patients who undergo sagittal split osteotomy without bone harvest. The technique described shows that the medial mandibular angle is a suitable donor site for membranous bone grafts in patients who undergo sagittal split osteotomy.