ABSTRACT
Objective To observe the clinical effect of platelet-rich fibrin (PRF) on prevention of postoperative hemorrhage and facial traumatic swelling in patients with mandibular angle osteotomy.Methods Twenty-five patients with mandibular angle hypertrophy were included in this study from January 2014 to November 2015.Split face comparative study was carried out to use the left and right sides as the experimental side and the control side,respectively.The PRF in the experimental side was placed in the mandibular osteotomy,while the control side was placed in platelet-poor plasma (PPP).After operation,the drainage volume and facial swelling degree were measured.Results The drainage volume of the experimental group (PRF group) was (20.35 ±7.40) ml,the control group (PPP group) was (43.23±11.96) ml,and the difference was statistically significant (P＜0.05).There was no such case without swelling in postoperative third day.The facial swelling score on the experimental side was (1.19±0.40),the control side was (2.62±0.64),and two groups of postoperative facial swelling scores were significantly different (P＜0.05).Conclusions The PRF can reduce postoperative bleeding and facial swelling after mandibular angle osteotomy.
ABSTRACT
Objective Aged facial contour presents changing facial skeleton and sagging soft tissue.We performed reshaping the facial skeleton simultaneouly during the rhytidectomy to achieve a youthful facial contour.Methods It was a retrospective observational study based on 26 elderly women (42-60 years) that complained of aged face and boosing of the orbital rim,prominent zygoma and mandibular angle.All of them had undergone reduction boosing,malar and mandible combined with rhytidectomy from January 2010 to December 2015.Results The facial skeleton was reshaped with face-lift successfully.No fatal bleeding,respiratory obstruction,cardiovascular accident,severe facial edema,permanent facial nerve injury and other major complications occurred.All of the patients recovered safely.Follow-up for 3-24 months showed that the facial contour and aging were improved,and the youthful face form was preserved.Conclusions The face contour correction combined with face-lift is an effective technique to restore the youthful for elderly patients.
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Objective To summarize the experience of clinical application of combining double suture fixation and resection of partial fat retro-orbicularis oculus in some specially difficult blepharoplasty.Methods During upper blepharoplasty,patients with heaviness and bulkiness in the both upper eyelid and lateral upper orbital region,we combined double suture fixation and resection partial fat retro-orbicularis oculus.First,partial pretarsal bulky fat was resected,and to form skin-orbicularisoculi composite below incision line.And then,some thickened fat retro-orbicularis oculus was resected,which was also named preseptal and retro-orbicularis oculus fat (ROOF).Double suture fixation techniques were applied to form dynamic and physiological double eyelid.Results 146 cases had satisfactory effectiveness,except for 2 cases with secondary operation because of some superficial double eyelid creases,and 1 case had hematoma,and 3 had transient numbness in the lateral supraorbital nerve region.They were satisfied with healthy eyelid skins,concealed incision and non-serious complications followed at 3-24 months postoperatively.Conclusions Combining double suture fixation and resection of partial fat retro-orbicularis oculus would appear to be a useful adjunct to standard blepharoplasty techniques in selected patients.
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Objective To assess the mutagenicity of polycyclic aromatic hydrocarbons(PAHs) extracted from the atmospheric particulates collected from different aerodynamic sizes,seasonal variation and the sampled sites,and to detect the effect of these factors on the mutagenic activity of PAHs.Methods PAHs were extracted from the atmospheric particulates(PM10 and PM2.5) collected from two different sites,business area and industrial area(summer and winter respectively).The mutagenicity of these PAHs samples was evaluated by the Salmonella mutagenicity assay(Ames assay),using Salmonella typhimurium strains TA98 and TA100 with and without metabolic activation(S9).Each sample was assayed in three doses(125,250 and 500?g per plate).Results All samples induced the number of revertants to be higher measured with TA98 with and without S9 mix.The level of specific mutagenic activity measured with strain TA98 was higher than TA100.Metabolic activation with the S9 fraction increased the mutagenicity of the industrial area samples studied for the strain TA98.All groups showed a good dose-response relationship of mutagenicity(P