Objective:To investigate the influence on osteogenesis during mandibular augmentation with a new sandwichosteotomy with interpositional natural coral and coralline hydroxyapatite (CHA).Methods:Nine goats were randomly divided into three groups and observed at 6 months, 12months and 18 months after surgery. All goats received splitting of bilateralmandibular outer cortex and interpositional grafting with natural coral and corallinehydroxyapatite respectively (sandwich osteotomy). Partial mandible in each group had been harvested to do histology examination(HE staining and Toluidine blue staining) and ultrastructure analyses (Scanning electron microscope, SEM).Results:All subjects were evaluated atdifferent time points. Both natural coral and coralline hydroxyapatite side healed at three groups. Natural coral were degraded at about 6 months postoperation, coralline hydroxyapatite at about 12 months. The results of HE staining, Toluidine blue staining and SEM revealed that natural coral side had better osteogenesis than coralline hydroxyapatite side at 6 months after operation.However, Natural coral and coralline hydroxyapatite side had no significant differences at 12 and 18months.Conclusions:This study suggests an alternative method for mandibular augmentation witha sandwich osteotomy and interpositional grafting with natural coral and CHA.Bothcoral hydroxyapatite and natural coral have good osteogenesic effect for mandibular augmentation.

Objective:To investigate the influence on osteogenesis during mandibular augmentation with a new sandwichosteotomy with interpositional natural coral and coralline hydroxyapatite (CHA).Methods:Nine goats were randomly divided into three groups and observed at 6 months, 12months and 18 months after surgery. All goats received splitting of bilateralmandibular outer cortex and interpositional grafting with natural coral and corallinehydroxyapatite respectively (sandwich osteotomy). Partial mandible in each group had been harvested to do histology examination(HE staining and Toluidine blue staining) and ultrastructure analyses (Scanning electron microscope, SEM).Results:All subjects were evaluated atdifferent time points. Both natural coral and coralline hydroxyapatite side healed at three groups. Natural coral were degraded at about 6 months postoperation, coralline hydroxyapatite at about 12 months. The results of HE staining, Toluidine blue staining and SEM revealed that natural coral side had better osteogenesis than coralline hydroxyapatite side at 6 months after operation.However, Natural coral and coralline hydroxyapatite side had no significant differences at 12 and 18months.Conclusions:This study suggests an alternative method for mandibular augmentation witha sandwich osteotomy and interpositional grafting with natural coral and CHA.Bothcoral hydroxyapatite and natural coral have good osteogenesic effect for mandibular augmentation.

OBJECTIVE: To explore the safe method with anhydrous ethanol injection in the treatment of venous malformation.
 METHODS: A total of 96 patients with venous malformation were conducted anhydrous ethanol injection for 245 times through percutaneous puncture by three-point method. The complications were observed. In animal experiment, according to the different concentrations of anhydrous ethanol injection, rats were divided into an anhydrous ethanol group, a 75% ethanol group, a 50% ethanol group and a 25% ethanol group (n=5 in each group), and the damage of vessels after ethanol injection was observed.
 RESULTS: The successful rate for three-point ethanol injection was 88%. The incidence for both skin ulcer and numbness was 0.9% without severe complications in lung and heart. In the animal experiments, the entire vessel wall including outer membrane was damaged in the anhydrous ethanol group. Part of vessel walls, including the inner membrane and muscle layer, were damaged in both the 75% ethanol group and the 50% ethanol group. However, there was no damage in the vessels in the 25% ethanol group.
 CONCLUSION With the decrease in ethanol concentration, the vascular damage is decreased and eventually disappeared. Three-point anhydrous ethanol injection is safe and effective.
Animals ; Ethanol ; administration & dosage ; therapeutic use ; Humans ; Injections ; methods ; Rats ; Sclerosing Solutions ; therapeutic use ; Sclerotherapy ; Vascular Malformations ; therapy

OBJECTIVES: Rhinoplasty is one of the most common cosmetic surgeries in China. Septal extension grafts (SEG) have been widely used in rhinoplasty, but there are few reports on SEG derived from ear cartilage. This study aims to explore the effectiveness and stability of auricular cartilage nasal SEG transplantation in Chinese rhinoplasty. METHODS: A retrospective analysis of 35 rhinoplasty patients admitted from September 2019 to March 2022 has been conducted. Among them, 29 patients underwent rhinoplasty for the first time and 6 patients underwent rhinoplasty with the age of 18-32 (average 22.4) years old. The postoperative follow-up was 3-28 (average 18.5) months. The improvement of the nose shape was observed. The changes of the nose tip angle, nasolabial angle, and nasofrontal angle were compared between before and after the operation, and the complications were recorded. RESULTS: All patients who underwent rhinoplasty with a septal extension grafts constructed from the concha cavity and concha cartilage showed significant improvement in nasal contour. The preoperative nasal tip angle, nasolabial angle, and nasofrontal angle were significantly improved compared with 3 months after operation (all P<0.001), and there was no significant difference between 3 months and 14 months after operation (all P>0.05). The appearance of nasal cavity was satisfactory in 32 patients after operation. Columella deviation occurred in 2 patients and 1 patient complained of downward rotation of the nasal tip, which was satisfied after readjustment of the graft. CONCLUSIONS The simplified SEG derived from auricular cartilage can provide stable support for the nasal tip, the nasal shape is natural after operation, and minimal trauma of unilateral auricle cartilage transplantation remains.
Humans ; Young Adult ; Adult ; Rhinoplasty ; Ear Cartilage/transplantation* ; Retrospective Studies ; Nasal Septum/transplantation* ; Plastic Surgery Procedures