Periprosthetic Fracture after Total Shoulder Arthroplasty

Periprosthetic humeral fractures in patients with total shoulder arthroplasty are rare and difficult to treat. With the significant increase in the number of older patients who have undergone total shoulder arthroplasty in recent years, an increase in the number of periprosthetic shoulder fractures can be estimated. The decisions of treatment have to be taken individually, depending on the stability of the prosthesis, fracture location, and bone quality. On the other hand, there are limited data for treatment guidance and outcomes. This paper reviews the risk factors, classification, treatment, and outcomes of periprosthetic humeral fractures.

A study of bracket base (in-and-out) in Korean / 대한치과교정학회지

This study was undertaken to finish the design of the adequate preadjusted bracket in Korean. The labio-lingual & bucco-lingual width of tooth & in-and-out of the bracket base was studied in normal occlusion of 17 males & 17 females. The following results were obtained. 1. The in-and-outs of the bracket base in Korean were obtained (table 2). 2. The in-and-outs of the premolar & molar were no significant due to variation according to arch wire shape in clinical practice, so the more adjustment of arch wire was required. 3. The more amount of offset was required at lateral-canine offset than at central-lateral offset in 1st order bending, due to difference of the in-and-out. 4. The degrees of the anti-rotation in molar were obtained (table 3).