Bunion (Hallux Valgus) Surgery: What New Research Reveals About Pressure, Pain, and Function
Considering bunion (hallux valgus) surgery but wondering what it really changes beneath the surface? Here’s the short answer: when performed with carefully planned soft-tissue reconstruction and metatarsal osteotomies, surgery can normalise pressure under the toes and forefoot—key indicators of function and comfort in daily walking. Below, we unpack a 2023 study that measured how plantar pressure changes before and after corrective procedures in patients with severe bunions and lesser toe dislocations, and what that means for outcomes in real life.
Quick Take: The Study in a Nutshell
A 2023 study in the Journal of Foot and Ankle Surgery evaluated patients with moderate-to-severe hallux valgus plus dislocation of the second metatarsophalangeal (MTP) joint. All underwent:
- Open reduction and collateral ligament reconstruction of the second MTP joint
- Proximal metatarsal shortening osteotomy under the second metatarsal
- Proximal first metatarsal osteotomy (a standard bunion correction component)
Researchers analysed plantar pressure across 12 foot regions, comparing 16 operated feet pre- and post-operatively with 20 healthy controls.
Source: J Foot Ankle Surg. 2023 Sep-Oct;62(5):825-831. doi: 10.1053/j.jfas.2023.04.009 | PubMed: 37160201
Key Findings That Matter for Patients
Under the second toe: function improved to “normal-like”
- Before surgery: peak pressure, maximum force, and contact area were all significantly lower than in healthy feet—signs of altered gait and toe-off mechanics.
- After surgery: those measures significantly increased versus pre-op and were no different from healthy controls—suggesting restoration of more natural forefoot loading.
Under the second metatarsal head: harmful overload reduced
- Before surgery: peak pressure was significantly higher than healthy controls—consistent with metatarsalgia risk.
- After surgery: peak pressure dropped significantly and matched controls—implying relief from focal overload that often drives pain.
What This Means for Bunion (Hallux Valgus) Surgery Outcomes
In severe bunion cases with second-toe MTP dislocation, addressing both bony alignment and soft-tissue stability appears pivotal. By combining a proximal first metatarsal osteotomy with open reduction, collateral ligament reconstruction, and a proximal second metatarsal shortening osteotomy, the study reports:
- Normalisation of pressure beneath the second toe—helpful for push-off strength and balance.
- Reduction of excessive load under the second metatarsal head—linked to less pain during walking and standing.
- Overall indication of improved foot function after recovery.
Who Might Benefit From This Combined Approach?
Based on the data, candidates include patients with:
- Moderate-to-severe hallux valgus deformity
- Concomitant dislocation or instability of the second MTP joint
- Forefoot pain due to second-ray overload (metatarsalgia) unresponsive to conservative care
In our experience, these are precisely the scenarios where simply “straightening the bunion” isn’t enough. Stabilising and rebalancing the lesser toe mechanics can be the difference between short-term relief and durable function.
Answers at a Glance: Common Questions About Bunion Surgery
Does bunion surgery improve walking mechanics?
According to this study, yes—post-operative pressure patterns under the second toe and metatarsal head shifted towards those seen in healthy feet, a proxy for improved gait mechanics.
Will it help metatarsalgia?
The significant reduction in peak pressure under the second metatarsal head suggests a lower risk of ongoing metatarsalgia after appropriate reconstruction.
Is soft-tissue reconstruction necessary?
For cases with second-toe MTP dislocation, adding open reduction and collateral ligament reconstruction to osteotomies was associated with more normal pressure distribution and better functional indicators.
How Strong Is the Evidence?
This is a controlled study with objective plantar pressure metrics, a practical surrogate for function. Limitations include the modest sample size (16 operated feet) and single-protocol design. Still, the normalisation towards healthy controls is clinically meaningful and aligns with what we often see in practice.
Reference: J Foot Ankle Surg. 2023 Sep-Oct;62(5):825-831. doi: 10.1053/j.jfas.2023.04.009; PubMed: 37160201
Takeaway for Patients Considering Bunion (Hallux Valgus) Surgery
When severe bunions coexist with second-toe dislocation, a comprehensive surgical plan—combining first metatarsal osteotomy with targeted second-ray reconstruction—can rebalance pressures across the forefoot. The result, as demonstrated in this 2023 study, is a shift towards healthy, efficient loading that supports comfort and function during everyday activities.
If you’re weighing options for Bunion (Hallux Valgus) Surgery, ask whether your surgeon will address both the bunion and any lesser-toe instability. In suitable patients, that holistic approach may offer the best chance of long-term relief and natural-feeling movement.
J Foot Ankle Surg. 2023 Sep-Oct;62(5):825-831. doi: 10.1053/j.jfas.2023.04.009. Epub 2023 May 7.
ABSTRACT
Hallux valgus surgery and open reduction of the lesser metatarsophalangeal joints with metatarsal shortening osteotomy help treat severe hallux valgus concomitant with the lesser metatarsophalangeal joint dislocation; however, pre- and postoperative plantar pressure distribution and its effect on the foot remain unclear. The pre- and postoperative groups comprised 16 patients with moderate-to-severe symptomatic hallux valgus with lesser metatarsophalangeal joint dislocation. All feet underwent open reduction and collateral ligament reconstruction of the second metatarsophalangeal joint and proximal metatarsal shortening osteotomy under the second metatarsal with proximal osteotomy of the first metatarsal. Twenty healthy participants (20 feet) were included in the control group. The plantar pressure distribution was determined by measuring the peak pressure, maximum force, contact area, and force-time integral for 12 regions. Under the second toe, all measurements in the preoperative group were significantly lower than those of the control group. The peak pressure, maximum force, and contact area of the postoperative group were significantly greater than those of the preoperative group. However, no differences were observed between the postoperative and control groups. Under the second metatarsal head, the peak pressure of the preoperative group was significantly higher than that of the control group. The peak pressure of the postoperative group was significantly lower than that of the preoperative group and showed no differences from the control group. Open reduction and collateral ligament reconstruction of the lesser metatarsophalangeal joints and proximal metatarsal shortening osteotomy with proximal osteotomy of the first metatarsal in hallux valgus with lesser metatarsophalangeal joints dislocation cases may improve operative outcomes, including favorable foot function.
PMID:37160201 | DOI:10.1053/j.jfas.2023.04.009
