Biomechanical properties of the costal cartilage and its significance in the timing of ear reconstruction / 中华整形外科杂志

<p><b>OBJECTIVE</b>To investigate the age-related change in biomechanical properties of the costal cartilage and its relevance to the timing of ear reconstruction with costal cartilage framework.</p><p><b>METHODS</b>The patients of 5 to 25 years old were divided into three groups according to their age. The biomechanical properties of costal cartilage harvested from these patients during ear reconstruction were tested, including stree-strain relationship, stress relaxation and creep, tensile strength. All the results were analyzed statistically.</p><p><b>RESULTS</b>The costal cartilage from children group had the best biomechanical properties, while the costal cartilage from the adolescent group had the worst. The difference had a statistically significance (P < 0.05).</p><p><b>CONCLUSIONS</b>The biomechanical properties of costal cartilage are age-related. So it is recommended that ear reconstruction with costal cartilage framework should be performed in childhood when the costal cartilage has the best biomechanical properties.</p>

Clinical study of chest contour deformity after harvesting of costal cartilage for total ear reconstruction / 中华整形外科杂志

<p><b>OBJECTIVE</b>To investigate the chest contour deformities after harvesting of costal cartilage for total ear reconstruction, so as to prevent donor site morbidity.</p><p><b>METHODS</b>107 cases of microtia who underwent ear reconstruction with costal cartilage during the period from 1994 to 2003, were retrospectively studied. Both the chest depression deformity and the costal arch deformity were evaluated. The possible related factors to the chest contour deformities were analyzed statistically with Stata software.</p><p><b>RESULTS</b>The incidence of chest depression was 54.55% (48/88), including 35 cases of mild depression (39.77%) and 13 cases of severe depression (14.77% ). The incidence of costal arch deformity was 52.77% (46/88), including 33 cases of mild deformity (37.50%) and 13 cases of severe deformity (14.77%). The incidence of both deformities was significantly different at different age (P < 0.01), but not at different follow-up period (P = 0.294 and P = 0.225, respectively). Gender was related to the incidence of chest depression (P < 0.01), but not to the costal arch contour deformity (P = 0.619). Comparing resection of the 6th and 7th rib cartilage with resection of 7th and 8th rib cartilage, the incidence of costal arch deformity was significantly different (P < 0.01), but the incidence of depression deformity was not (P = 0.657).</p><p><b>CONCLUSIONS</b>The incidence of chest deformities increases with early operation time (< 13 years old). The male patients have higher incidence of depression deformity than female. The arch deformity is higher when the 6th and 7th rib cartilage were resected. The follow-up period is not related to the chest deformities.</p>

Clinical significance of vascular distribution type of the expanded skin in the mastoid region in congenital microtia / 中华整形外科杂志

<p><b>OBJECTIVE</b>To classify the blood vessel distribution of the expanded skin in the mastoid region and its relevance to reasonable and reliable design of the expanded flap for auricular reconstruction in congenital microtia.</p><p><b>METHODS</b>The blood vessel distribution of the expanded skin in the mastoid region was observed by light permeation test. The expanded flaps with different ratio of length to width were designed according to their blood vessel distribution types.</p><p><b>RESULTS</b>The vascular distribution of the expanded skin in 403 cases was divided into five types. All the flaps survived completely.</p><p><b>CONCLUSIONS</b>The blood vessel distribution type of the expanded skin in mastoid region has great significance for the design of post-auricular expanded flap in auricular reconstruction.</p>

Case control study on risk factors of congenital microtia / 中华耳鼻咽喉头颈外科杂志

<p><b>OBJECTIVE</b>To identify the risk factors associated with congenital microtia.</p><p><b>METHODS</b>A case-control, retrospective study was performed. A total of 207 cases of congenital microtia and 209 age-frequently-matched controls were interviewed individually according to the uniform questionnaire. The questionnaire included: (1) Essential information about patients and their parents. (2) First trimester diseases and medication of mother. (3) Past gestation history of mother. (4) Family history and life style of the parent. The available data were analyzed by chi-square test and multivariate Logistic regression model.</p><p><b>RESULTS</b>The factors, such as gender (OR = 5.893), first trimester disease of mother (OR = 34.49) and medication (OR = 4.299), excessive drinking and smoking of father (OR = 4. 347, OR = 4.304), non-primiparous parity (OR = 9.524), abortion (spontaneous and induced, OR = 1.723), low-education of mother (OR = 2.275) were risk factors contributing to microtia in multivariate study. The factors, such as tea (OR = 0.179) were protective factors in multivariate study.</p><p><b>CONCLUSIONS</b>Multi-risks factors are contributing to microtia. Preventive measures according to risk factors should be put forward.</p>

Classification and repairment of "butterfly ear" deformity / 中华整形外科杂志

<p><b>OBJECTIVE</b>To classify and repair "Butterfly Ear" deformity which presents characters of dysplasia of inferior auricle of ear and congenital bat ear.</p><p><b>METHOD</b>The repairment procedures include: type I: auricular cartilage flap inversion folding technique. type II: local ear skin flap. type III: soft tissue expander autogenous, rib cartilage framework.</p><p><b>RESULTS</b>The method was used in 19 cases from October 2001 to March 2005. Postoperative follow-up showed satisfactory results in all cases.</p><p><b>CONCLUSION</b>According to "Butterfly Ear" deformity classification, different technique could be applied.</p>

Psychologic status and their influencing factors in congenital microtia patients and their families / 中华整形外科杂志

<p><b>OBJECTIVE</b>To study the psychologic status and their influencing factors in congenital microtia patients and their families.</p><p><b>METHODS</b>Totally one hundred and two congenital microtia patients (79 men, 23 women, mean age 13.62 +/- 7.2 years) were enrolled. The patients and their families answered the questionnaire written by ourselves to identify the psychosocial problems.</p><p><b>RESULTS</b>(1) 23.5% patients were found to have severe psychosocial problems, such as lack of self-confidence, close and fear and so on. (2) With the growth of age, psychosocial problems of the patients were rated high (P < 0.05). (3) For patients who found their deformations early, psychosocial problems also were rated low. (4) For patients who found their deformations by themselves, psychosocial problems also were rated low. (5) The education and psychosocial impact for parents all affected patients deeply.</p><p><b>CONCLUSIONS</b>To prevent psychosocial problems, we should operate for patients as early as possible. And correct guidance is very important for youngsters.</p>