Treatment of Nondisplaced Salter-II Fracture at Base of Fifth Proximal Phalanx in a 9-Year-Old
Immobilize the finger with buddy taping to the fourth digit and allow immediate mobilization—no closed reduction is needed for a nondisplaced fracture. 1, 2
Initial Management Algorithm
For this specific injury in your 9-year-old patient, follow this approach:
Since the fracture is nondisplaced:
- Apply buddy taping to the fourth (ring) finger
- No closed reduction is required
- Allow immediate mobilization with the buddy tape in place
- Immobilize for 3-4 weeks 2, 3
- Schedule follow-up within 1 week to ensure maintenance of alignment 4
Key Clinical Assessment Points
Before finalizing conservative treatment, verify:
- No clinical malrotation when examining the digital cascade in flexion 1, 3
- Coronal angulation ≤10° on radiographs 1
- No rotational deformity on physical exam 2
If any of these thresholds are exceeded, surgical intervention with closed reduction and Kirschner wire fixation becomes necessary 1.
Evidence Supporting Conservative Management
The most recent high-quality evidence strongly supports nonsurgical management for nondisplaced Salter-Harris type II proximal phalanx fractures. A 2024 multi-institutional study of 634 pediatric proximal phalanx fractures demonstrated that extra-articular juxtaphyseal fractures rarely require surgery, with only 0.93% developing rotational malalignment 2.
Buddy taping with immediate mobilization is particularly effective for fifth digit fractures. A prospective study of 53 consecutive fifth proximal phalanx base fractures treated with buddy taping showed high satisfaction, with all but one patient regaining full flexion and only mild pain reported in four patients 5. No nonunions or delayed unions occurred with this approach 5.
Critical Monitoring Parameters
During the 3-4 week immobilization period:
- Week 1 follow-up: Confirm fracture alignment is maintained radiographically 4
- Check for any developing scissoring or rotational deformity clinically 2
- If coronal angulation progresses beyond 10° or clinical malrotation develops, proceed to closed reduction and K-wire fixation 1
Common Pitfalls to Avoid
- Do not over-treat nondisplaced fractures with surgical fixation—internal fixation often leads to decreased finger mobility despite exact reduction 5
- Do not immobilize in a rigid cast—buddy taping allows functional movement while protecting the fracture 5
- Do not skip the 1-week follow-up—early detection of displacement allows timely intervention if needed 4
The 2026 instructional course specifically emphasizes that most physeal fractures can be managed with immobilization alone, and Salter-Harris type II proximal phalanx fractures typically succeed with nonsurgical treatment 1. Your patient's nondisplaced fracture falls squarely into this category, making buddy taping with immediate mobilization the optimal evidence-based approach.