| 摘要 |
The orthodontic arch apparatus comprises a lock adapted for attachment to a tooth having a passage with at least one aperture formed in its side wall. A spring is adapted for attachment to the lock, a portion of the spring extending through the aperture and into the passage. A latch is adapted for bearing an orthodontic arch wire, being receivable in the passage and having at least one recess adapted for locking engagement with the portion of the spring. - The passage extends lengthwise in the direction of the long axis of the tooth. Two of the apertures are formed in opposite side walls of the passage to form a U-shaped recess when viewed in the lengthwise direction.(2/3) |
