Investigation of Thenar Muscles Morphometric Parameters in Patients With TMC OA

USG procedures will performed on patients with TMC OA and healthy volunteers. Cross-sectional area measurements of thenar muscles of patient and healthy volunteers will performed using a Shimadzu SDU 1200-Pro ultrasound system with 8-10 MHz linear probe. USG device will calibrated prior to the study. Water bath technique for USG evaluation will preferred in order to improve the image quality and to avoid muscle compression. The hands will positioned in a 60x50x40 cm water-filled plastic container. Five thenar muscles will imaged in the hands of each subject: Opponens pollicis, abductor pollicis brevis, flexor pollicis brevis, first dorsal inteosseous and adductor pollicis muscles. Images will acquired in the cross-sectional planes. 2 evaluators blinded to each other will measure 15 minutes apart. With the first evaluator, it will measure for the second and third times at 30-minute intervals from the first measurement.

USG procedures will performed on patients with TMC OA and healthy volunteers.Thickness measurements of thenar muscles of patient and healthy volunteers will performed using a Shimadzu SDU 1200-Pro ultrasound system with 8-10 MHz linear probe. USG device will calibrated prior to the study. Water bath technique for USG evaluation will preferred in order to improve the image quality and to avoid muscle compression. The hands will positioned in a 60x50x40 cm water-filled plastic container. Five thenar muscles will imaged in the hands of each subject: Opponens pollicis, abductor pollicis brevis, flexor pollicis brevis, first dorsal inteosseous and adductor pollicis muscles. Images will acquired in the cross-sectional planes. 2 evaluators blinded to each other will measure 15 minutes apart. With the first evaluator, it will measure for the second and third times at 30-minute intervals from the first measurement.

In this study, while PA radiographic imaging will performed, the elbows will ppositioned in 90 ° flexion, wrists in neutral position, MCP joints at 15-20 ° flexion and nails parallel to each other. During the scanning, patient will toush his thumbs together with maximum force. Three different measurements will made: the radial subluxation (RS) of the first metacarpal base, the articular width of the first metacarpal (AG), and the distance between the ulnar articular facet of the trapezium and the ulnar edge of the metacarpal (U) in milimeter will measured. RS/AG rate will calculated.

Disability of Arm Shoulder and Hand (DASH) will used to determine functional status of hand.The total score is 100, and higher scores indicate a worse functional level.

The grip strength will be measured in kilograms using a Jamar Hand Dynamometer

Michigan Hand Outcomes Questionnaire (MHQ) includes 6 subtitles, namely general hand function, ADL, pain, work, aesthetics and satisfaction, and these headings are filled in for theight and left hand. Score calculation for each title is calculated separately. The total score is 100, high scores mean better functional status.

Pain intensity was evaluated using the visual analog scale (Visual Analogue Scale, VAS). The patients were told that the number "0" means "no pain" and "10" means "unbearable pain" on a 10 cm horizontal line. Patients were asked to mark the severity of pain during rest and activity on this line. The marked place was measured and the result was recorded as the intensity of pain in cm.

The pinch strength will be measured in kilograms using a Pinchmeter.

Hand skills are evaluated in two different ways, namely placing the discs in their slots and rotating them. People are told that this test is a performance test and they are asked to complete the test as soon as possible. In the insertion part of the test, the patient is asked to take the discs one by one using one hand and put them in the appropriate slots respectively. In the rotating part of the test, the patient is asked to move the discs placed in their nests by rotating the discs in the upper right corner towards the left row. Both tests are repeated 3 times and the result is recorded in seconds.

This test, which is used to evaluate fine hand skills, is carried out by taking 9 pins from the ground and placing them in the holes and removing them. The test time is approximately 10 minutes. After the patient is told that the test is a performance test and that it will be timed, he is asked to insert the pins first and then remove them as soon as possible. The test is performed twice consecutively on both hands and the two attempts are averaged, the results are recorded in seconds.