Table 6 Comparison of intra-articular parameters with age-specific reference values [7]

FFA before treatment

Age group

(years)

Reference value

(°)

eight-Plates^TM

(°)

RigidTacks^TM

(°)

8–10

144 (143–146)

141 (131–153)

n=6

133 (123–150)

n=11

11–12

143 (142–144)

137 (115–150)

n=14

131 (107–146)

n=25

13–14

141 (140–142)

132 (109–148)

n=11

133 (120–145)

n=20

15–16

140 (138–142)

136 (133–139)

n=3

-

FFA after treatment

Age group

(years)

Reference value

(°)

eight-Plates^TM

(°)

RigidTacks^TM

(°)

8–10

144 (143–146)

145 (143–147)

n=2

-

11–12

143 (142–144)

124

n=1

142

n=2

13–14

141 (140–142)

138 (129–149)

n=9

128 (111–142)

n=18

15–16

140 (138–142)

134 (121–156)

n=19

130 (108–145)

n=22

TRA before treatment

Age group

(years)

Reference value

(°)

eight-Plates^TM

(°)

RigidTacks^TM

(°)

8–10

140 (139–141)

140 (136–143)

n=6

143 (137–151)

n=11

11–12

144 (143–145)

142 (138–150)

n=14

146 (140–153)

n=25

13–14

145 (145–146)

145 (138–154)

n=11

146 (140–157)

n=20

15–16

147 (145–148)

144 (141–150)

n=3

-

TRA after treatment

Age group

(years)

Reference value

(°)

eight-Plates^TM

(°)

RigidTacks^TM

(°)

8–10

140 (139–141)

133 (132–133)

n=2

-

11–12

144 (143–145)

143

n=1

144 (141–146)

n=2

13–14

145 (145–146)

140 (135–149)

n=9

145 (137–157)

n=18

15–16

147 (145–148)

144 (135–152)

n=19

146 (140–153)

n=22