Archives of Clinical and Experimental Medicine, vol.4, no.2, pp.86-89, 2019 (Other Refereed National Journals)
Aim: Mathematical relationships between bones in close proximity are useful for determining the proper length
of comminuted or severely displaced bones during surgical reconstruction. This study examined the relationship
between the lengths of the clavicle and ulna to develop a length propotion formula that can facilitate obtaining
the proper length of the clavicle during surgery for displaced and comminuted fractures.
Methods: The study enrolled 130 individuals (76 males, 54 females) who were healty for their upper extremities
and was seen in our orthopedics outpatient clinic during April 2019 to June 2019. The right and left clavicles
and ulnas of each individual were measured. All measurements were peformed by two of the authors in an
Results. Mean overall age was 32.2 years. There were significant correlations between the clavicle and
ipsilateral ulnar lengths (p=0.001). However, there was a length difference between the right and left clavicles.
The left clavicle was 9.00 ± 2.16 mm longer than the right in males and 7.13 ± 2.03 mm longer in females
(p=0.001). There was no significant length difference between the right and left ulnas in either sex (0.84 ± 1.033
mm in males and 0.52 ± 0.818 mm in females).
Conclusion. There is a significant ratio between the clavicle and ulna lengths on both the right and left sides in
both sexes, but it isn’t the same for males and females. We propose that these length proportion formula can be
used for determining the clavicle length for the surgical treatment of comminuted fractures with plates and
particularly with nails.
Key words: Comminuted fracture, clavicle, ulna, length ratio.