Conduct literature review on clavicle fracture treated with TENS AND PLATING

Clavicle fractures, particularly those involving the midshaft, are common injuries often affecting young, active adults. Although nonoperative treatment remains standard for minimally displaced fractures, surgical intervention has gained prominence for displaced, shortened, or comminuted midshaft clavicle fractures to reduce risks of nonunion, malunion, and functional impairment. The main operative techniques are open reduction and internal fixation (ORIF) with plate osteosynthesis and minimally invasive intramedullary fixation, such as with titanium elastic nailing systems (TENS).

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Comparative Overview: Plating versus TENS for Midshaft Clavicle Fractures

1. Plating Techniques

Plate fixation is generally considered the gold standard, especially for comminuted or segmental fractures, as it affords rigid fixation and accurate restoration of length, alignment, and rotation.

Plate Position and Biomechanics

Plates can be placed either in the superior or anteroinferior position. Superior plating provides greater biomechanical stability in terms of bending load to failure and failure stiffness, particularly when locking plates are used, but does not significantly differ in axial compression compared to anteroinferior plating[1]. Locking plates specifically confer improved axial and bending stability and may be preferable for complex fractures or in osteoporotic bone[1].

Functional and Clinical Outcomes

Meta-analyses indicate that both superior and anteroinferior plating yield comparable union rates, nonunion rates, malunion rates, implant failure, and functional outcomes assessed via the Disabilities of the Arm, Shoulder, and Hand (DASH) and Constant scores[2][3]. However, superior plating is associated with higher rates of symptomatic hardware and implant removal due to prominence or irritation[2][3]. For example, Nourian et al. found the probability of symptomatic hardware at 17% with superior plating versus 8% with anteroinferior plating ($P=0.005$), and higher rates of implant removal with superior plating (11% vs. 5%, $P=0.008$)[2].

Complications

While generally safe, plate osteosynthesis carries risks such as hardware irritation, prominence, infection, and, rarely, neurovascular injury due to proximity of screws to subclavian vessels and brachial plexus[4][5]. One rare but noteworthy case is iatrogenic subclavian arteriovenous fistula[4]. Anatomical studies caution for careful screw length measurement and intraoperative vigilance to prevent neurovascular compromise[5]. Limb abduction during surgery has been demonstrated to increase the safe distance between hardware and neurovascular structures[5].

2. Titanium Elastic Nailing System (TENS)

TENS is a minimally invasive, intramedullary technique involving the passage of a flexible titanium nail across the medullary canal, offering reduced operative trauma.

Efficacy and Outcomes

Evidence from prospective comparative studies shows TENS provides similar union rates and functional outcomes to plating, as measured by the Constant score, but with several notable advantages: faster fracture union, shorter operative times, reduced intraoperative blood loss, minimal invasiveness, smaller surgical scars, and easier implant removal[6]. For instance, Saha et al. observed no significant difference in Constant scores between plated and TEN groups but found more rapid union and better cosmetic results in the TEN group[6].

Indications

TENS is best suited for simple, transverse, or short oblique midshaft fractures without significant comminution or segmental involvement. Plating remains preferable for comminuted or segmental fractures due to superior rotational and axial stability[6]. Intramedullary fixation is also an effective option for adolescents, with high union rates and good functional recovery, though hardware prominence remains a consideration[7].

Complications

Complications associated with TENS include implant migration, skin irritation at the entry point, and hardware prominence necessitating removal. Implant irritation is frequent but generally resolves after elective implant removal[6][7]. Compared to plate fixation, TENS is associated with fewer wound complications and lower infection rates, but inferior control of complex fracture patterns[6].

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3. Summary Table: Plating versus TENS for Midshaft Fractures

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4. Clinical Selection Considerations

• TENS is preferable for:

  • Young, active patients with simple, non-comminuted midshaft fractures seeking minimal scarring and rapid recovery<span class='cite cite-6'>[6]</span><span class='cite cite-7'>[7]</span>.
  • Situations where shorter operative time and easier implant removal are priorities.

• Plate fixation is preferred for:

  • Comminuted, segmental, or complex midshaft fractures due to superior biomechanical stability<span class='cite cite-1'>[1]</span><span class='cite cite-6'>[6]</span>.
  • Cases where precise restoration of clavicular length and alignment is crucial, such as in polytrauma or older patients.
  • Anatomically challenging cases, though risk of neurovascular injury and hardware irritation (especially in superior plating) must be considered<span class='cite cite-2'>[2]</span><span class='cite cite-3'>[3]</span><span class='cite cite-4'>[4]</span><span class='cite cite-5'>[5]</span>.

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5. Limitations and Developments

Current literature is limited by the relative paucity of randomized trials directly comparing TENS and plating, with some heterogeneity in patient selection and fracture patterns. The risk of major complications, though rare, underlines the importance of careful surgical planning and meticulous technique[4][5]. Ongoing research continues to refine implant design, fixation strategies (e.g., bridge plating for length restoration[8]), and surgical approaches to optimize outcomes and minimize complications.

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Conclusion

Both TENS and plating are established options for surgical management of displaced midshaft clavicle fractures, offering high rates of bony union and comparable long-term shoulder function[6]. TENS offers minimally invasive advantages and is ideal for select patient populations with simple fracture patterns, while plating remains the modality of choice for complex, comminuted injuries where superior fixation is required[1][6]. Implant-related irritation and the potential for neurovascular complications should inform individualized treatment planning[2][4][5][6].

The surgical approach for both plate fixation and Titanium Elastic Nailing System (TENS) in the treatment of midshaft clavicle fractures is well delineated in contemporary orthopedic literature, with each technique embracing distinct exposure, reduction, and fixation principles tailored to fracture morphology and patient safety.

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Plate Fixation (Open Reduction and Internal Fixation)

The traditional approach for plate fixation involves an open anteroinferior or superior exposure over the clavicle. The patient is positioned supine, often in a beach-chair position, with a bolster between the scapulae to elevate and stabilize the operative field. A linear or slightly curvilinear skin incision (typically 6–10 cm) is made directly over the clavicle, centered at the fracture site. Careful dissection continues through the subcutaneous layer, preserving the supraclavicular nerves. The periosteum is incised longitudinally, and minimal subperiosteal stripping is performed to maintain vascularity, unless additional exposure is necessary due to comminution or deformity [1][2][3].

Following acquisition of fracture fragments—either by direct visualization or indirect maneuvers—anatomic reduction is achieved. Temporary fixation methods, such as reduction clamps or Kirschner wires, are frequently deployed to maintain alignment. Definitive fixation is performed using precontoured plates—such as locking compression plates (LCPs) or reconstruction plates—in either the superior or anteroinferior position. Biomechanical data support superior plating as yielding higher bending stiffness and greater resistance to failure, but this may come at the cost of increased hardware prominence and irritation, leading to more frequent requests for implant removal compared to the anteroinferior position [1][4][5].

Caution is paramount during drilling and screw placement due to the proximity of neurovascular structures (notably the subclavian vessels and brachial plexus) beneath the clavicle. Studies have demonstrated that arm abduction can increase the distance between these structures and the clavicle, offering enhanced procedural safety [3]. Final closure is performed in layered fashion. Postoperative protocols typically call for early mobilization with graduated range-of-motion exercises, progressing according to bone healing and patient tolerance [1][5][6].

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Titanium Elastic Nailing System (TENS) / Intramedullary Fixation

The TENS technique is minimally invasive and designed for straightforward, transverse or short oblique midshaft fractures. The patient is placed supine (beach-chair optional), with a bolster to facilitate exposure. A small (1–2 cm) incision is made at the medial clavicle, typically 1–2 cm lateral to the sternoclavicular joint, at the anteromedial aspect. Following blunt dissection to protect underlying neurovascular structures, an entry point is made into the anterior cortex using an awl or drill [7][8][9][10].

A flexible titanium elastic nail—sized according to medullary canal diameter (generally 2.0–3.5 mm)—is pre-bent and advanced antegrade into the canal to the fracture site. If closed reduction is unsuccessful, a mini-open approach at the fracture is employed to facilitate direct manipulation and nail passage [9][10]. The nail traverses the fracture, restoring length and alignment; care is taken to avoid protrusion into the acromioclavicular joint laterally.

Once fixation is confirmed, the medial end of the nail is often left slightly proud—or bent—for ease of later removal. Medial skin closure is completed in standard fashion. Postoperative management emphasizes brief immobilization followed by early shoulder mobilization, with elective removal of the nail at 3–6 months, especially if symptomatic [7][9][10].

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Comparative Summary Table

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Taken together, plate fixation affords the surgeon unparalleled control over complex and comminuted patterns through an open approach, with biomechanical advantages especially for superior placement, though at increased risk of hardware-related symptoms and neurovascular injury if care is not exercised [1][2][3][4][5]. TENS, conversely, offers a minimally invasive operative course with smaller incisions, superior cosmetic results, and is particularly advantageous for simple, non-comminuted fractures; however, direct visualization is limited and technical success depends on reduction quality and awareness of medullary anatomy [7][8][9][10].

Surgical Approaches to Plate Fixation and Intramedullary Nailing for Midshaft Clavicle Fractures

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Version 1

In treating displaced midshaft clavicle fractures, two principal surgical approaches are used: open reduction with plate osteosynthesis and minimally invasive intramedullary fixation. For plate fixation, a longitudinal incision is typically made directly over the fracture site, often measuring 6–10 cm, with careful dissection through the skin and subcutaneous tissues to preserve the supraclavicular nerves. The periosteum is incised, allowing direct visualization and reduction of fracture fragments. Plates are placed either on the superior or anteroinferior surface of the clavicle, with biomechanical evidence favoring superior plating in terms of bending strength, although this technique may lead to increased hardware prominence and risk of neurovascular injury. Surgeons are advised to use meticulous screw placement and to consider limb abduction during the procedure, as this increases the distance between the clavicle and major neurovascular structures, thereby enhancing surgical safety [1][2][3][4][5]. In contrast, intramedullary fixation (using devices such as titanium elastic nails or specialized pins) involves a smaller incision, usually at the medial aspect of the clavicle. The nail is introduced into the medullary canal and advanced across the fracture site, often under fluoroscopic guidance. Closed reduction is preferred when feasible; however, mini-open exposure may be necessary for difficult cases or when precise alignment must be ensured. This minimally invasive method is associated with faster healing, less soft tissue disruption, and smaller scars, though it offers less control over comminuted fracture patterns and carries a risk of hardware migration [6][7][8][9][10].Improvements:This version provides a balanced overview of both techniques, integrating detailed descriptions of the incisions, reduction strategies, implant positions, and neurovascular safety considerations. Clarity is enhanced by clearly demarcating the two surgical approaches and discussing their respective advantages and limitations. The citation style is strictly adhered to, directly attributing claims to relevant articles.

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Version 2

Open reduction and plate fixation (ORPF) is the classic technique for operative stabilization of midshaft clavicle fractures. Surgeons use a linear or slightly curved incision over the affected bone segment to allow for full visualization, careful alignment, and anatomic reduction of fracture fragments. The choice between superior and anteroinferior plate placement involves a tradeoff: superior plates provide improved bending stiffness and resistance to failure, but are associated with higher rates of symptomatic hardware and possible neurovascular complications if screw length is not meticulously judged. Risk of iatrogenic injury is present regardless of plate location, thus intraoperative limb abduction is recommended to increase the distance between screw tips and vital structures [1][2][3][4][5]. Alternatively, minimally invasive intramedullary fixation is performed through a small incision at the medial or lateral end of the clavicle, allowing for the percutaneous insertion of a flexible nail. Closed reduction is attempted first; if unsuccessful, a small incision at the fracture may be used for direct manipulation. This method, which minimizes soft tissue disruption and shortens operative time, is ideally suited for simple, non-comminuted fractures and delivers favorable cosmetic and clinical results, though it is less apt for complex fracture anatomy [6][7][8][9][10].Improvements:This version improves specificity by characterizing scenarios best suited for each method. The academic tone is advanced by highlighting evidence-based rationale for intraoperative decisions, such as limb positioning and implant selection. Citations are attached immediately after key surgical steps to support technical claims, enhancing credibility.

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Version 3

Surgical fixation of midshaft clavicle fractures can be achieved by either open plate osteosynthesis or by intramedullary nailing. The open plating technique entails a sizeable incision over the fracture region, preservation of local neurovascular structures, and subperiosteal exposure for fracture reduction and plate application on the superior or anteroinferior cortex. The biomechanical superiority of superior plate positioning is offset by a greater risk of symptomatic hardware and increased likelihood of plate removal, while the risk of neurovascular compromise—although relatively infrequent—necessitates meticulous screw placement and consideration of limb positioning to optimize safety [1][2][3][4][5]. In contrast, titanium elastic nail insertion is minimally invasive, involving a small incision for the creation of an entry portal at the clavicle’s medial or lateral extremity, followed by advancement of the nail along the medullary canal. The technique can often be performed closed, but a mini-open approach at the fracture site is utilized if manipulation is necessary to achieve alignment. This intramedullary strategy preserves soft tissue and periosteal blood supply and is favored for straightforward fracture patterns, but it may require conversion to open reduction for comminuted injuries or if satisfactory stability cannot be attained [6][7][8][9][10].Improvements:This paraphrase articulates the operative steps and the clinical decision-making process, specifying indications, biomechanical tradeoffs, and complication avoidance measures. Clarity is furthered by connecting the selection of approach to the complexity of fracture morphology, and originality is fostered by synthesizing practice recommendations from multiple sources in a concise academic style.

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