Objective To evaluate the clinical effect of IPSe. max press ceramic endocrowns being used in preserving endodontically treated molars. Methods Forty-five endodontically treated molars were selected from 45 patients in this study. All the molars had been endodontically treated and performed with ultrasonic scaling. After 1-2 weeks, the crowns and pulp chambers were prepared. The impressions and master casts were gained and IPSe. max press ceramic endocrowns were fabricated in the lab. The endocrowns were cemented with resin cement. The further consultations were offered to these molars after 6 months and 1 year. The difference of sulcus bleeding index among these endodontically treated molars and the same teeth in the opposite sides was compared. Results In these cases, 100 % of endocrowns were

Objective To investigate the therapeutic effect of dense-packing auto hair grafting technique on the restoration of seborrheic alopecia. Methods With local anesthesia, a scalp strip was harvested from the back of the head. Under operating microscope (Various graft was created from the scalp strip, including micro-grafts with 1-2 hairs, mini-grafts with 3-4 hairs and sliver graft with 5-6 hairs. In the alopecia recipient area, micro slots were made with a small triangle-edged needle for the micro-grafts,mini slits were made with mini blade for the mini-grafts and foramen ovale were made with a slot punch. The grafts were then implanted into these holes. Results 32 cases of seborrheice alopecia were treated with the above mentioned technique from March 2007 to July 2009. Postoperative following up for 12-24 month showed that the grafted hairs were growing well with average 90 % survival of the hair. 81 % of the patients obtained satisfactory results with only one stage operation. Six patients needed the second operation to improve the appearance. All of the patients were satisfied with the appearance. Conclusions The dense-packing hair grafting technique with various grafts not only saves time of operation, but also obtains dense grafted hair and well appearance. The results are satisfactory to most patients with only one stage operation.

Objective To restore the incisal angle defect of anterior upper teeth with partial cov-erage porcelain veneer, and evaluate the clinical performance of the restoration. Methods A total of 12 patients were included, and 14 anterior upper teeth with small incisal angle defect were involved in this study, after tooth reduction of 2 mm wider than the defect of every teeth, 14 partial coverage IPS-Empress Ⅱ veneers were made and binded with Variolink Ⅱ adhesive system. During the observation period of 36-48 months after insertion, prosthodontic results were evaluated, using the CDA quality e-valuation system, and marginal integrity, anatomic form, surface and color of the veneers, and sec-ondary caries were examined. Results During the period of 36-48 observation, all of the 14 restora-tions were rated satisfactory. Conclusions With strict control of indications, the partial coverage porcelain veneer could function satisfactorily as an alternative restoration for small incisal defect of an-terior upper teeth.

Objective To investigate the efficacy and safety of photodynamic therapy (PDT) in the treatment of different types of rosacea,and to evaluate its benefit by comparing its efficacy with 10％ sodium sulfacetamide and 5％ sulfur emollient foam.Methods Forty-three subjects with rosacea were enrolled in this study.They were randomized to be treated with PDT (twenty-three subjects) or 10％ sodium sulfacetamide and 5％ sulfur emollient foam (twenty subjects).PDT group subjects received PDT once every seven to ten days for three times while the 10％ sodium sulfacetamide or 5％sulfur emollient foam was applied 2 times per day for thirty days in the other group.Digital photographs were taken before and after one month of treatment in both groups.Blinded independent physicians graded improvement based on these photographs utilizing a percentile evaluation scale.A more than sixty percent remission proved the treatment to be effective.All the complications occurred during the therapy were taken notes and their severity was classified by the subjects.Two dermatology life quality index forms were completed before and after treatment by the subjects to evaluate the change in terms of their quality of life.Results After one month of treatment,PDT proved to be effective on sixty-five percent of subjects (seventy-one percent on papulopustular rosacea and fifty percent on erythematotelangiectatic rosacea).The emollient foam proved to be effective on thirty-five percent of subjects.Statistically significant difference was observed between the overall effective rate of PDT and emollient foam (P＜0.05).In addition,a greater improvement in terms of the quality of life was experienced by the PDT group subjects.No irreversible adverse event was observed in both groups during the study.Conclusions PDT proves to be an effective and safe treatment for rosacea with satisfactory efficacy,significant improvement in patients' quality of life and few irreversible side effects.

Objective To survey the knowledge of the Urumqi population in Xinjiang on the awareness and the protection of ultraviolet (UV) irradiation.Methods Three hundred and twentyfour subjects from Urumqi were investigated with a questionnaire about the basic knowledge of UV,the UV protection methods,the awareness and application of sunscreens,and the channels through which they acquired the knowledge.Results A total of 324 subjects completed the questionnaire.Only 78.0％ knew the harmful effects of UV,62.0％ of them knew that UV could lead to skin photo-aging,and 54.9％ knew that UV irradiation could cause skin cancer.Sunscreens were the main choice for UV protection (58.0％).Regarding sunscreens,38.3％ subjects knew the meaning of SPF,and only a small percentage of subjects (17.3％) were aware of the meaning of PA.About 25.3％ of subjects applied sunscreens every day,43.2％ used sunscreens sometimes,and 18.5％ did not use it at all.The main factor of choosing sunscreens was brand popularity and the main information sources to get the knowledge of UV and UV protection were TV advertisements.Conclusions This study shows that the knowledge of UV and UV protection of the Urumqi population is acceptable,but the protections are insufficient,which should be strengthened and guided through dermatologists and multiple media.

Objective To obtain a simple method to treat segmental vitiligo. Methods The grafting was carried out as following: the epidermal cellular suspension was obtained from leg skin by razor blade after trypsinization. The suspension of epidermal cells were injected into depigmented lesion blisters which were produced by freezing with nitrogen. Results All of the patients which received treatment had successful repigmentation. Conclusion This technique is an effective and simple method for treating patients with segmental vitiligo.

Objective Tostudythecellapoptosisandp5 3geneexpressionoffibroblastsisolatedfromdifferenttissues .Methods Thefibroblastsfrom 8casesofnormalskin ,8hypertrophicscarsand 9keloids wereculturedrespectivelyinvitro.Flowcytometryanddotblotanalysisofp5 3withcDNAprobewereappliedandtheirbiologicalpropertieswerecomparedinthisstudy .Results Apoptoticcellsofthreegroupswereasfollows:(10 .8? 1.2 ) % ,(10 .6? 1.8) %and (5 .5? 0 .8) % ,respectively .Theresultsrevealedthatthere werefewerapoptoticcellsinkeloidthanthoseinhypertrophicscarandnormalskin (P

0.05). ConclusionsTwo methods of fibero tomy do not effect on the periodontal tissues. The PSP is more excellent than t he MSF in preventing the corrected teeth from relapsing and keeping the aest hetic feeling of the gingival shape.

Objective To explore the application of Artglass material in aesthetical restoration. Methods A total of 2196 restoratio ns, including 1963 veneers and 233 crowns, were made for 335 patients, and clini cal results were examined and recorded one by one. The related problems were dis cussed. Results There was significant improvement on cosmetics in most of the 2196 restorations; 44 restorations in 21 patients were failed, re sulting in a failure rate of 2%. The failure cases were repaired with Chrisma ma terial or remade with Artglass material. Conclusion Artglass ma terial has satisfactory prosthesis effects in aesthetical restoration. The bondi ng process and occlusion adjustment are important and should be specially notice d.

Objective To explore an effective method in reconstructing of burn scar contracture of the chin and neck in children. Methods The blood in the transverse cervical artery might flow reverse into the suprascapular artery and the posterior intercostals perforators through anastomic branches. An axial skin flap in the cervico-scapulo-dorsal area could be adequately supplied by this artery, and we had therefore used this flap to repair burn scar in the neck. Results 30 cases obtained satisfactory clinical results with this flap. The follow-up for two years in 18 patients showed that the neck of the patients moved about freely, and the develpment of the chin was not influenced, and the color of flaps was fine. Conclusion The blood supply of the flap is reliable and stable. So it is a very useful method in reconstructing the burn scar of the chin-neck in children.