| Objective:It was the aim of this clinical study to compare the skeletal and dentoalveolar effects as well as those on the profile of two different treatment approaches in adult skeletal ClassⅡmalocclusion patients (camouflage orthodontics and combined orthodontic and surgical treatment).Method:Twenty-four patients that exhibited skeletal ClassⅡmalocclusion were included in the study. Twelve of these patients had camouflage orthodontics treatment,eleven of those were female,one of those was male,age from 18～30 years old,the average age was 22.3±3.8 years old; the remaining 12 patients had combined orthodontic and surgical treatment, ten of those were female,two of those was male,age from 21-40 years old,the average age was 27.8±6.2 years old. The cephalograms studied were taken before the treatment (T0 and Z0), before the surgical procedure(T1=4 weeks before operation), after the procedure (T2=4 weeks after) and after the treatment (Z2). The statistical analysis used to assess the results between and within the groups over the different time periods was the analysis of variance.Results:There was a statistically significant increase in the Angle of L1-MP and Line of U6-PP from T1 to TO (P＜0.05),also overbite decrease; From T2 to T1:Angle of SNA and ANB,Angle of Convexity,overjet,overbite,U1 Exposure,line of Upper lip to E plane and U lip protrusion had a a statistically significant reduction (P＜0.01),include line of Lower lip to E plane.While Angle of U1-L1 and Naso-labial Angle had a statistically significant increase. After camouflage orthodontics treatment(Z2 to ZO), Angle of U1-SN,overjet,line of Upper lip to E plane and U lip protrusion had a a statistically significant reduction(P＜0.01), also were Angle of SNB,line of Lower lip to E plane and L lip protrusion(P＜0.05),but Angle of U1-L1,OP-FH,Naso-labial Angle(P＜0.01) and line of U1-PP,U lip length (P＜0.05) had a a statistically significant increase. Between the two groups(T0 vs Z0):There was a statistically significant difference in Angle of ANB,OP-FH,Angle of Convexity,line of U1-PP,overbite(P＜0.01) and Angle of U1-L1,Facial Convexity,Angle of U1-SN,Facial Angle(P＜0.05). The results of T2 vs Z2 were:Angle of U1-L1 of T2 was smaller than Z2(P＜0.01), at the same time,Angle of SNA,ANB and overbite were slightly smaller than Z2(P＜0.05),but line of U1-PP,Lower lip to E plane,L lip protrusion and Facial Convexity were greater than Z2(P＜0.05). Between T1-T2 vs Z0-Z2:the decreased degree of Angle SNA,ANB,Angle of Convexity,overbite were more than Z0-Z2(P＜0.01) and slightly more of U1 Exposure(P＜0.05). The decreased degree of Angle U1-SN and the increased degree of Angle U1-L1 were less than Z0-Z2(P＜0.01), while slightly less of U1 Exposure'increased degree(P＜0.05).Conclusion:1,The dentoalveolar,skeletal and soft tissue characters before treatment just as the ANB angle greater than 6°and Facial Convexity larger than 15°et al can help clinician to select the treatment of adult skeletalⅡmalocclusion.2,Both camouflage orthodontics and combined orthodontic and surgical treatments can improve the profile of skeletal ClassⅡmalocclusion. The improving of SNA,SNB,ANB Angle,overjet,U1 Exposure and Angle of Convexity were obviously more significant by orthognathic treatment. And the retruded Upper incisors increased the risk of absorption of roots.3,Which degree of the inclination of Upper and Lower incisors we showed obtain before surgery.not only according to the move and rotation of jaw bones, also the inclination of Upper and Lower incisors and a ideal profile and the stability of jaw bones after the surgery we should consider.
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