Osteo-cutaneous microvascular free-flaps are a viable option for reconstructing the temporomandibular joint

Background

There are multiple reconstructive options after mandibular resection and disarticulation of the condyle. The purpose of this study was to assess the clinical outcomes and functionality of osteocutaneous free flaps in the reconstruction of mandibular defects that involve the Temporo-Mandibular Joint (TMJ).

Methods

Our study is a retrospective cohort study involving subjects who underwent mandibular resection and needed TMJ reconstruction with vascularized bony-free flaps from February 2016 to June 2018. Data gathered included patient demographics, post-operative function, maximum interincisal opening (MIO), occlusion status, deviation on opening, and TMJ symptoms. Data points collected from postoperative CT imaging included the following: position of the flap in relation to the glenoid fossa and articular eminence, and closest point of contact.

Results

Eight out of the nine patients who underwent free flap reconstruction of mandibular defects involving the TMJ qualified for the study. The mean age was 39.7 years old. In all 8 cases, virtual surgical planning (VSP) was used. The mean follow-up time was 18.75 months. The flap success rate was 100%. The mean MIO was 37.37 mm. Six patients resumed their premorbid diet, and one patient developed dysphagia and was peg tube dependent. In seven cases the occlusion was intact and reproducible, one case was without sufficient teeth for occlusion. On imaging, the mean distance from the neo-condyle to the glenoid fossa was 14 mm and to the articular eminence 8.68 mm. The point of closest contact in all cases appeared to be the articular eminence.

Conclusion

Vascularized Osteocutaneous-flaps such as FFFs and DCIA flaps provide a good option for the reconstruction of mandibular defects that involve the TMJ. Ipsilateral deviation on opening does not negatively affect clinical outcomes or function. Placing patients in Maxillomandibular fixation for 4-6 weeks may help to prevent condylar sag and provide stable post-operative occlusion.

Is Head and Neck Free Flap Reconstruction Feasible in Jehovah's Witness Patients?

BACKGROUND

Jehovah's Witnesses (JW) population are members of a religious group that refuses blood transfusion. This presents a dilemma for surgical teams when performing major surgical procedures on these patients.

PURPOSE

This study aimed to assess the safety and feasibility of undergoing microvascular free flaps for maxillofacial reconstruction in JW patients and whether the type of underlying pathology impacts outcomes.

STUDY DESIGN, SETTING, AND SAMPLE

This was a multi-institutional retrospective cohort study. The sample consisted of all JW patients who have undergone microvascular free tissue transfer for maxillofacial pathology between January 2016 and January 2021.

PREDICTOR VARIABLE

The primary predictor variable was the underlying pathology for which patients underwent head and neck free flap reconstruction; this was benign versus malignant disease.

MAIN OUTCOME VARIABLES

The primary outcome variables were safety, defined as discharge from the hospital with no mortality, and feasibility defined as successful free flap reconstruction.

COVARIATES

Other variables included age, race, sex, length of surgery, length of hospital stay, and intraoperative use of vasopressors.

ANALYSIS

Data analysis was performed utilizing t-tests for means and χ2 for proportions. Alpha was set at < 0.05.

RESULTS

A total of 12 participants from 7 participating sites met the inclusion criteria. There were 9 males and 3 females with a mean age of 58.3 ± 8.3 years. There were no deaths in this cohort and all patients were discharged from the hospital. All 12 free flap reconstructions were successful with no incidents of free flap loss; none of the patients received any blood transfusions or any other blood products. Subgroup analysis showed that patients treated for malignant disease versus benign disease had longer operations (11.2 ± 2.9 vs 6.3 ± 0.2 hours, P < .01) and a longer hospital length of stay (11.8 ± 4.9 vs 5.3 ± 0.5 days, P = .04).

CONCLUSION AND RELEVANCE

Our series supports the safety and feasibility of maxillofacial free flap reconstruction in this challenging subset of patients. Microvascular reconstructive surgeries for malignant diseases often result in longer operative times and hospital stays.

Is Maxillofacial Gunshot Wound Location Associated With Operative Intervention?

PURPOSE

Gunshot wound (GSW) injuries are an important public health concern in the United States. The study purpose was to measure the association between GSW location and need for operative treatment.

METHODS

This was a retrospective cohort study. Sample consisted of all patients treated for maxillofacial gunshot wound injuries at Cook County Health from 2008 to 2018. The sample data were collected through a retrospective charts review and review of computed tomography imaging. The predictor variable was the region of the face involved with the GSW and it was divided into 3 levels, upper face (UF), middle face (MF), and lower face (LF). The outcome variable was whether operative intervention was rendered or not (operative vs no intervention). Other variables of interest collected included patient demographics, the type of surgical intervention, disposition (home vs rehab/morgue), rate of intracranial injury, and need for blood transfusion. Data analysis was performed using Chi-square for proportions and relative risk (RR) with 95% confidence interval (CI).

RESULTS

A total of 180 patients were identified to have sustained GSW injuries to the face during abovementioned time frame. Of those, 120 patients had isolated GSW injuries with no other organs involvement. The median age was 25 years. Majority of the patients were males (94%). The involved facial region appeared to influence the need for operative management and this reached statistical significance (Chi-square 22.703, P < .001). GSW injuries to LF were 2.94 times more likely to require operative intervention than injuries to the MF (RR = 2.94, 95% CI = 1.625-5.327). Injuries of the UF were 2 times more likely to require operative intervention than injuries of the MF (RR = 2.03, 95% CI 1.023-4.008). Injuries to the UF were more likely to be associated with intracranial injuries (Chi-square = 20.522, P < .001).

CONCLUSIONS

In patients with facial GSW injuries, there is an association between injury location and the need for operative intervention. Injuries to the LF were most likely to require surgical intervention followed by the UF and MF, respectively.