How do I manage restricted mouth opening secondary to problems with the temporomandibular joint?

Restricted mouth opening is a common problem that presents to secondary care, and management depends on the primary cause. The most common differential diagnoses related to the temporomandibular joint (TMJ) include muscle spasm secondary to pain, anchored disc phenomenon, irreducible anterior disc displacement, rheumatoid diseases, and ankylosis. In this paper each is considered in turn.     

How do oral and maxillofacial surgeons manage concussion?

Craniofacial trauma results in distracting injuries that are easy to see, and as oral and maxillofacial surgeons (OMFS) we gravitate towards injuries that can be seen and are treatable surgically. However, we do tend not to involve ourselves (and may potentially overlook) injuries that are not obvious either visually or radiographically, and concussion is one such. We reviewed the records of 500 consecutive patients who presented with facial fractures at the Queen Elizabeth Hospital, Birmingham, to identify whether patients had been screened for concussion, and how they had been managed. Of the 500 cases 186 (37%) had concussion, and 174 (35%) had a more severe traumatic brain injury. The maxillofacial team documented loss of consciousness in 314 (63%) and pupillary reactions in 215 (43%). Ninety-three (19%) were referred for a neurosurgical opinion, although most of these were patients who presented with a Glasgow coma scale (GCS) of ≤13. Only 37 patients (7%) were referred to the traumatic brain injury clinic. Recent reports have indicated that 15% of all patients diagnosed with concussion have symptoms that persist for longer than two weeks. These can have far-reaching effects on recovery, and have an appreciable effect on the psychosocial aspects of the patients’ lives. As we have found, over one third of patients with craniofacial trauma are concussed. We think, therefore, that all patients who have been referred to OMFS with craniofacial trauma should be screened for concussion on admission, and at the OMFS follow up clinic. In addition, there should be an agreement between consultants that such patients should be referred to the traumatic brain injury clinic for follow up.     

How to … manage the transition from functional to fixed appliances

Abstract

This paper presents the methods of transfer from functional to fixed appliances. The aim of transition should be maintenance of Class II correction in a time-efficient manner without compromising long-term patient co-operation.     

Assault-related facial fractures: does the injury mechanism matter?

This study clarified the injury characteristics and occurrence of associated injuries in patients with assault-related facial fractures. Data from 840 assault-related facial fracture patients were included; demographic factors, facial fracture type, associated injuries, alcohol use, and injury mechanisms were recorded. Assault mechanisms most often included combinations of different mechanisms (57.5%) and resulted in the victim falling (50.1%). The perpetrator was most commonly a stranger (52.5%) and acted alone (57.7%). A total of 123 patients (14.6%) had associated injuries, with the most common being traumatic brain injury. Associated injuries occurred most frequently in patients with combined fractures of the facial thirds (24.2%) and upper third fractures (42.9%). The most significant differentiating factors for associated injuries were the number of perpetrators, falling, the use of an offensive weapon, and if the events of the assault remained unknown. In adjusted logistic regression analyses, statistically significant associations with associated injuries were found for age (odds ratio (OR) 1.05, 95% confidence interval (CI) 1.03–1.07; P < 0.001), falling due to the assault (OR 2.87, 95% CI 1.49–5.50; P = 0.002), and upper third facial fractures (OR 6.93, 95% CI 2.06–23.33; P = 0.002). A single punch also caused severe injuries and should therefore not be overlooked, as this can be as dangerous as other assault mechanisms.     

Does the great auricular nerve predict the size of the maintrunk of the facial nerve? A clinical and cadaveric study

There seems to be only individual clinical experience and some anecdotal evidence about a relation between the width of the great auricular nerve (GAN) and the size of the main trunk of the facial nerve during parotidectomy. To our knowledge no anatomical studies have been published. In this cadaveric and clinical study we measured the widest point of the GAN as it crosses the sternomastoid muscle before it divides, and the main trunk of the facial nerve before it bifurcates. Measurements were obtained from 16 patients who required formal superficial parotidectomies with identification of the facial nerve, and from 21 cadavers (16 formalin-fixed and 5 fresh frozen) where both sides were dissected. We recorded the results and the side of dissection. The mean (SD) width of the GAN and facial nerve from all the dissections was 2.75 (0.53) mm and 2.83 (0.54) mm, respectively. There was a strong correlation between the width of the nerves from both sides (left: r = 0.934, p < 0.001; right: r = 0.940, p < 0.001). The nerves did not differ significantly in size in patients or cadavers (GAN: right, p = 0.873; left, p = 0.486; facial nerve: right, p = 0.931; left, p = 0.691). We have found that the GAN accurately predicts the width of the main trunk of the facial nerve. This is particularly useful surgically as a narrow GAN can alert the surgeon to expect a small facial nerve.     

How should we manage oral leukoplakia?

The aim of this article is to review the management of oral leukoplakia. The topics of interest are clinical diagnosis, methods of management and their outcome, factors associated with malignant transformation, prognosis, and clinical follow-up. Global prevalence is estimated to range from 0.5 to 3.4%. The point prevalence is estimated to be 2.6% (95% CI 1.72–2.74) with a reported rate of malignant transformation ranging from 0.13 to 17.5%. Incisional biopsy with scalpel and histopathological examination of the suspicious tissue is still the gold standard for diagnosis. A number of factors such as age, type of lesion, site and size, dysplasia, and DNA content have been associated with increased risk of malignant transformation, but no single reliable biomarker has been shown to be predictive. Various non-surgical and surgical treatments have been reported, but currently there is no consensus on the most appropriate one. Randomised controlled trials for non-surgical treatment show no evidence of effective prevention of malignant transformation and recurrence. Conventional surgery has its own limitations with respect to the size and site of the lesion but laser surgery has shown some encouraging results. There is no universal consensus on the duration or interval of follow-up of patients with the condition.     

Does encountering the facial nerve during surgical management of mandibular condylar process fractures increase the risk of facial nerve weakness? A systematic review and meta-regression analysis

Purpose

The purpose of this study was to identify whether the incidence of systematically identified or incidentally encountered facial nerve branches during dissection to approach condylar fractures increases risk of transient and/or permanent facial nerve weakness.

Could skin retraction incision minimize nerve injury over the iliac crest?

The aim of this study is to elucidate the nerve passage over the iliac crest shifted by skin retraction in harvesting iliac bone graft. A total of 44 iliac crests obtained of 22 nonembalmed Korean fresh cadavers were dissected (six males and 16 females; age range, 57-91 years). In A group (22) of "reposed skin," a skin incision was made from the anterior superior iliac spine (ASIS) to the highest level of iliac crest (HLIC). In B group (22) of "medial retraction," skin was tugged medially 1.5 cm and an incision was made from ASIS to HLIC. In A group, the nerve branches were injured in 19 (86.4%) and 15 (68.2%) in B group. Most injured nerves crossed over the iliac crest and at the posterior half site of ASIS to HLIC. The involved nerves were the subcostal nerve, iliohypogastric nerve, and ilioinguinal nerve. Subcostal nerve was less inflicted with injury in B group (one branch, 4.5%) than A group (four branches, 18.2%). P value is 0.151. Iliohypogastric nerve was significantly least injured in B group (three branches, 13.6%) compared with A group (10 branches, 45.5%). P value is 0.022. An injuring rate of ilioinguinal nerve was almost the same between A group (13 branches, 59.1%) and B group (14 branches, 63.61%). P value is 0.760. In the procedure of harvesting iliac bone graft, it is suggested to make an incision on the skin retracted medially and on the anterior half site of ASIS to HLIC to avert an injury of superficial sensory nerves.