Body mass index and risk of postoperative disorders and complications after third molar removal 
Overvægt og fedme er forbundet med systemisk inflammation og forskellige sygdomme. Derudover synes kirurgisk morbiditet og risikoen for komplikationer at være højere hos patienter med overvægt og fedme. Indflydelsen af overvægt og fedme ved oral kirurgi er dog ukendt. Body Mass Index (BMI) er det mest anvendte værktøj til at kategorisere kroppen som undervægtig, normalvægtig, overvægtig og fed.

Introduction and objectives
Overweight and obesity is associated with systemic inflammation and various diseases. In addition, surgical morbidity and the risk for complications seems higher in patients with overweight and obesity. The influence of overweight and obesity in oral surgery seems unknown. The body mass index is the most frequently used tool to categorize the body into underweight, normal weight, overweight, and obesity. The objective of this systematic literature review is to evaluate if overweight and obesity is associated with an increased risk for postoperative morbidity and complications compared to normal weight patients in third molars surgery.

Material and methods
A literature search was conducted using MEDLINE (PubMed) and the Cochrane Library in combination with a hand search of relevant journals. Inclusion criteria were prospective controlled studies examining body mass index and surgical removal of third molars. The search identified 51 articles, whereas three studies were included.

Results
Two studies found no significant correlation between body mass index and postoperative morbidity. One 
study showed an association between higher body mass 
index and increased postoperative pain, and higher risk of 
complications.

Conclusions
Umiddelbart er der ikke evidens for, at et højere BMI er forbundet med øget risiko for komplikationer efter kirurgisk fjernelse af tredjemolarer. Konklusionerne bør dog tolkes med forsigtighed pga. lille population samt forskelle i undersøgelsesmetoder og udfald. Yderligere veldesignede studier med større populationer og ensartede metoder er nødvendige, før endelige konklusioner kan drages
At present, there is no evidence that a higher BMI is associated with an increased risk of complications 
following surgical removal of third molars. However, conclusions should be interpreted with cautions due to the included studies with small sample sizes, description of method, and different outcome measures. Further well-designed studies with larger sample sizes are needed.