Immediate effect of thermal capsulorrhaphy on glenohumeral joint mobility.
OBJECTIVE
To evaluate the effects of anterior thermal capsulorrhaphy of the glenohumeral joint by monitoring changes of magnitudes of the anterior and posterior displacements of the humeral head and ranges of motion of abduction and rotation in fresh cadaver shoulders.


METHODS
Single session repeated-measures design.


BACKGROUND
Following thermal shrinkage anterior and posterior displacements of the head of humerus were decreased. However, no studies were focused on the ranges of motion of abduction and rotation of the shoulder joint immediately. The mobility of abduction and rotation are also important indexes for glenohumeral function.


METHODS
Nine fresh frozen shoulder specimens were used. The dorsal and ventral displacements of humeral head and ranges of motion of abduction and rotation of glenohumeral joint before and after thermal capsulorrhaphy were performed and monitored. Changes after thermal treatment in these linear and angular displacement variables were calculated as outcome measures.


RESULTS
After anterior thermal capsulorrhaphy, significant (P < 0.001) decreases were found in displacements (-1.80 mm in dorsal direction and -1.24 mm in ventral direction), rotation range of motion (-3.93 degrees in lateral rotation and -2.60 degrees in medial rotation), and abduction range of motion (-3.15 degrees ).


CONCLUSIONS
The results from cadaveric experiments showed that anterior thermal capsulorrhaphy immediately reduced the dorsal and ventral displacements and ranges of abduction and rotation of glenohumeral joint by a small amount.


CONCLUSIONS
Radiofrequency electrosurgical system combined with arthroscopy has the potential to decrease the translations of the humeral head as well as the rotational range of motion of the glenohumeral joint.
Chang
Jia-Hao
JH
Institute of Biomedical Engineering, National Cheng Kung University, 1, Ta-Hsueh Road, Tainan 701, Taiwan.
Hsu
Ar-Tyan
AT
Lee
Sen-Jen
SJ
Chang
Guan-Liang
GL
D000368:Aged; D000369:Aged, 80 and over; D001182:Arthroscopy / Q000379:methods; D002102:Cadaver; D017115:Catheter Ablation / Q000379:methods*; D004548:Elasticity; D006801:Humans; D006979:Hyperthermia, Induced / Q000379:methods; D066298:In Vitro Techniques; D017746:Joint Capsule / Q000503:physiopathology / Q000601:surgery*; D007593:Joint Instability / Q000503:physiopathology* / Q000601:surgery*; D008875:Middle Aged; D009068:Movement; D016059:Range of Motion, Articular; D020127:Recovery of Function; D012785:Shoulder Joint / Q000503:physiopathology* / Q000601:surgery*; D019415:Torque; D016896:Treatment Outcome; D016474:Weight-Bearing