Journal List > J Korean Fract Soc > v.31(3) > 1099131

Lee, Kim, Kim, Chung, Kang, and Jo: Comparative Analysis of Minimally Invasive Plate Osteosynthesis and Intramedullary Nailing in the Treatment of the Distal Tibia Fractures

Abstract

Purpose

This study compared the radiological and clinical results of minimally invasive plate osteosynthesis (MIPO) and intramedullary nailing (IMN) of distal tibial fractures, which were classified as the simple intraarticular group and extraarticular group.

Materials and Methods

Fifty patients with distal tibial fractures, who could be followed-up more than 12 months, were evaluated. Group A consisted of 19 patients treated with MIPO and group B consisted of 31 patients treated with IMN. The results of each group were analyzed by radiological and clinical assessments.

Results

The mean operation times in groups A and B were 72.4 minutes and 65.7 minutes, respectively. The mean bone union times in groups A and B were 16.4 weeks and 15.7 weeks, respectively. The bone union rate in groups A and B were 100% and 93%, respectively. The ranges of ankle motion were similar in the two groups at the last follow-up. The mean American Orthopaedic Foot and Ankle Society score was similar: 90.1 in group A and 90.5 in group B. The radiological and clinical results were similar in the intra and extraarticular groups. In groups A and B, two cases of posterior angulation and five cases of valgus deformity of more than 5o were encountered.

Conclusion

Both MIPO and IMN achieved satisfactory results in extraarticular AO type A and simple articular extension type C1 and C2 distal tibia fractures.

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Fig. 1.
(A) Initial radiographs of a 38-year-old female show a distal tibiofibular metaphyseal simple intraarticular fracture. (B) Postoperative radiographs show closed reduction and internal fixation with an anatomical locking compression plate. intraarticular fracture was fixed with a cannulated screw and distal fibula fracture was fixed with a plate and screws. (C) Last follow-up radiographs showing a solid union state.
jkfs-31-94f1.tif
Fig. 2.
(A) Initial radiographs of a 46-year-old male show a distal tibiofibular metaphyseal simple intraarticular fracture. (B) Postoperative radiographs show closed reduction and internal fixation with an interlocking intramedullary tibial nail. intraarticular fracture was fixed with 2 cannulated screws and distal fibula fracture was fixed with Rush pin. (C) Last follow-up radiographs show solid union state.
jkfs-31-94f2.tif
Fig. 3.
(A) Initial radiographs of a 71-year-old female show distal tibiofibular metaphyseal simple intraarticular fracture. (B) Distal tibial fracture fixed with minimally invasive plate osteosynthesis shows a 12o posterior angulation deformity.
jkfs-31-94f3.tif
Fig. 4.
(A) Initial radiographs of a 49-year-old male show distal tibiofibular metaphyseal simple intraarticular fracture. (B) Distal tibial fracture fixed with intramedullary nailing show a 7o valgus angulation deformity.
jkfs-31-94f4.tif
Table 1.
Demographic Data
Variable MIPO group IM nail group p-value
Sex (male/female) 10/9 22/9 0.190
Age (yr) 59.4 (27–78) 52.5 (18–83) 0.172
BMI (kg/m2) 23.9 (18.7–27.0) 23.6 (19.3–32.3) 0.736
DM (yes/no) 3/16 10/21 0.198
Follow-up period (mo) 16.4 (12–32) 15.2 (12–30) 0.283
Closed/open fracture 15/4 25/6 0.884
Combined fibular fracture 18 (94) 30 (96) 0.721

Values are presented as number only, median (range), or number (%) MIPO: minimally invasive plate osteosynthesis, IM: intramedullary, BMI body mass index, DM: diabetes mellitus.

Table 2.
Distribution of Cases on the AO/OTA Classification
AO/OTA classification MIPO group IM nail group
A1 3 11
A2 1 9
A3 3 4
C1 6 6
C2 6 1
Total 19 31

Values are presented as number only. MIPO: minimally invasive plate osteosynthesis, IM: intramedullary.

Table 3.
Distal Fibular Fracture Fixation Method
Variable MIPO group IM Nail group
Plate & screw 8 6
Rush pin 3 8
Total 11 14

Values are presented as number only. MIPO: minimally invasive plate osteosynthesis, IM: intramedullary.

Table 4.
Number of Distal Locking Screws for IM Nail Group
No. of screw intraarticular extraarticular Total
2 5 (3) 13 (9) 18 (12)
3 4 (4) 9 (9) 13 (13)
Total 9 22 31 (25)

Values are presented as number (cross locking screw). IM: intramedul lary.

Table 5.
Comparison of the Radiologic & Clinical Outcomes
Variable MIPO group IM nail group p-value
Operation time (min) 72.4 (67–87) 65.7 (60–72) <0.001
Bone union time (wk) 16.4 (14–20) 15.7 (12–19) 0.173
Angulation (o)      
  Coronal 2.1 2.3 0.716
  Sagittal 2.0 2.7 0.365
ROM (o)      
  Dorsiflexion 17.0 (13–20) 16.6 (12–20) 0.511
  Plantar flexion 41.1 (35–50) 42.4 (35–50) 0.343
AOFAS score 90.1 (85–97) 90.5 (84–96) 0.691

Values are presented as median (range) or mean only. MIPO: minimally invasive plate osteosynthesis, IM: intramedullary, ROM: range of motion, AOFAS: American Orthopaedic Foot and Ankle Society.

Table 6.
Comparison of the Radiologic & Clinical Outcomes for Intra & Extraarticular Fracture
Variable intraarticular extraarticular
MIPO group IM nail group p-value MIPO group IM nail group p-value
Operation time (min) 72.4 (67–87) 67.3 (65–72) 0.037 72.4 (67–80) 65.1 (60–87) 0.011
Bone union time (wk) 16.2 (14–19) 15.7 (13–18) 0.516 16.7 (12–18) 15.7 (11–17) 0.213
Angulation (o)            
  Coronal 2.0 1.7 0.608 2.2 2.6 0.754
  Sagittal 2.2 2.1 0.894 1.5 3.0 0.371
ROM (o)            
  Dorsiflexion 16.7 16.5 0.863 17.5 16.7 0.195
  Plantar flexion 41.4 40.5 0.731 40.5 43.2 0.155
AOFAS score 90.8 (87–97) 90.6 (85–98) 0.923 88.8 (85–97) 90.4 (84–96) 0.275

Values are presented as median (range) mean only. MIPO: minimally invasive plate osteosynthesis, IM: intramedullary, ROM: range of motion, AOFAS: American Orthopaedic Foot and Ankle Society.

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