[Clinical study of chest contour deformity after harvesting of costal cartilage for total ear reconstruction].

Objective: To investigate the chest contour deformities after harvesting of costal cartilage for total ear reconstruction, so as to prevent donor site morbidity.

Methods: 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.

[Biomechanical properties of the costal cartilage and its significance in the timing of ear reconstruction].

Objective: 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.

Methods: 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.

[Clinical significance of vascular distribution type of the expanded skin in the mastoid region in congenital microtia].

Objective: 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.

Methods: 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.

[Psychological status of congenital microtia patients and relative influential factors: analysis of 410 cases].

Objective: To investigate the psychologic status of congenital microtia patients and related influential factors.

Methods: In a cross-sectional survey for congenital microtia, 410 patients, 314 males and 96 females, aged 12 +/- 6 (5 - 37), underwent psychological survey with the symptom checklist-90 (SCL-90) or Achenbach child behavior checklist (CBCL), centering on the 3 main psychological problems: depression, interpersonal sensitivity or social difficulties, and hostility or aggression. A questionnaire was designed to investigate the influencing factors, such as the patients' own factors, and psychological factors of the patients' families Chi square test and logistic regression analysis were performed to find the factors contributing to those psychological problems.

[Classification and repairment of "butterfly ear" deformity].

Objective: To classify and repair "Butterfly Ear" deformity which presents characters of dysplasia of inferior auricle of ear and congenital bat ear.

Method: The repairment procedures include: type I: auricular cartilage flap inversion folding technique. type II: local ear skin flap.

[Case control study on risk factors of congenital microtia].

Objective: To identify the risk factors associated with congenital microtia.

Methods: 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.

[Psychologic status and their influencing factors in congenital microtia patients and their families].

Objective: To study the psychologic status and their influencing factors in congenital microtia patients and their families.

Methods: Totally one hundred and two congenital microtia patients (79 men, 23 women, mean age 13.62 +/- 7.