Chewing motion horse 1 - Long, thick stem hay being left by a horse with very sharp teeth. In this case it is caused by a horse with a diminished chewing pattern due to muscle atrophy of the right masseter muscle.
The atrophied right cheek muscle and the limited ability to open the mouth (see previous images) has caused the incisors to wear unevenly. The condition of the cheek teeth are unknown as even with potent pain medication, the mouth opens only wide enough to insert the float but not wide enough to examine with fingers or visually.
Chewing motion horse 1 - R masseter muscle atrophied and horse unable to open the mouth
Chewing motion horse 1 - This is as far as he can open his mouth comfortably. R masseter muscle atrophy
Chewing motion horse 1 - R masseter muscle atrophied and horse unable to open the mouth
Chewing motion horse 1 - R masseter muscle atrophied and horse unable to open the mouth
Chewing motion horse 2 - 15 yr old TB with loss of right masseter muscle for over 10 years and atrophy of the left masseter muscle. See movie. Jaw has a limited range of opening, is painful to open wide, and is maxed in the picture of the opened mouth. Her right arcades are always sharper. Her left arcade is sheared with an acute occlusal angle, and tarter accumulates along the upper left arcade.
Chewing motion horse 2 - 15 yr old TB with loss of right masseter muscle for over 10 years and atrophy of the left masseter muscle. See movie. Jaw has a limited range of opening, is painful to open wide, and is maxed in the picture of the opened mouth. Her right arcades are always sharper. Her left arcade is sheared with an acute occlusal angle, and tarter accumulates along the upper left arcade.
Chewing motion horse 2 - 15 yr old TB with loss of right masseter muscle for over 10 years and atrophy of the left masseter muscle. See movie. Jaw has a limited range of opening, is painful to open wide, and is maxed in the picture of the opened mouth. Her right arcades are always sharper. Her left arcade is sheared with an acute occlusal angle, and tarter accumulates along the upper left arcade.
Chewing motion horse 2 - 15 yr old TB with loss of right masseter muscle for over 10 years and atrophy of the left masseter muscle. See movie. Jaw has a limited range of opening, is painful to open wide, and is maxed in the picture of the opened mouth. Her right arcades are always sharper. Her left arcade is sheared with an acute occlusal angle, and tarter accumulates along the upper left arcade.
Chewing motion horse 2 - 15 yr old TB with loss of right masseter muscle for over 10 years and atrophy of the left masseter muscle. See movie. Jaw has a limited range of opening, is painful to open wide, and is maxed in the picture of the opened mouth. Her right arcades are always sharper. Her left arcade is sheared with an acute occlusal angle, and tarter accumulates along the upper left arcade.
Chewing motion horse 2 - 15 yr old TB with loss of right masseter muscle for over 10 years and atrophy of the left masseter muscle. See movie. Jaw has a limited range of opening, is painful to open wide, and is maxed in the picture of the opened mouth. Her right arcades are always sharper. Her left arcade is sheared with an acute occlusal angle, and tarter accumulates along the upper left arcade.
Chewing motion horse 2 - 15 yr old TB with loss of right masseter muscle for over 10 years and atrophy of the left masseter muscle. See movie. Jaw has a limited range of opening, is painful to open wide, and is maxed in the picture of the opened mouth. Her right arcades are always sharper. Her left arcade is sheared with an acute occlusal angle, and tarter accumulates along the upper left arcade.
Chewing motion horse 2 - 15 yr old TB with loss of right masseter muscle for over 10 years and atrophy of the left masseter muscle. See movie. Jaw has a limited range of opening, is painful to open wide, and is maxed in the picture of the opened mouth. Her right arcades are always sharper. Her left arcade is sheared with an acute occlusal angle, and tarter accumulates along the upper left arcade.
Chewing motion horse 2 - 15 yr old TB with loss of right masseter muscle for over 10 years and atrophy of the left masseter muscle. See movie. Jaw has a limited range of opening, is painful to open wide, and is maxed in the picture of the opened mouth. Her right arcades are always sharper. Her left arcade is sheared with an acute occlusal angle, and tarter accumulates along the upper left arcade.
