• José Manuel Pérez-González, Vicente Esparza-Villalpando, Ricardo Martínez-Rider, Miguel Ángel Noyola-Frías, and Amaury Pozos-Guillén.
• Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, San Luis Potosi University, San Luis Potosí, SLP, Mexico.
• Pain Res Manag. 2018 Jan 1; 2018: 7938492.

IntroductionFactors that contribute to swelling and trismus are complex, and they are originated by surgical trauma. The aim of the present study was to determine whether clinical and radiographic factors could predict the level of swelling and trismus after lower third molar surgery, through longitudinal approach.MethodologyA prospective longitudinal trial was carried out. Forty-five patients of both genders with clinical and radiographic diagnosis of asymptomatic mandibular impacted third molar and with no intake of analgesic or anti-inflammatory drugs 12 h prior to surgery were recruited and evaluated in a 72 h follow-up period. A mixed repeated measures model and backward and restricted maximal likelihood methods were used to analyze the data.ResultsMale gender, body mass index (BMI), the relation to the lingual and buccal walls, and age were determinants for predicting postoperative swelling and for exerting a significant influence (P < 0.05).ConclusionsThis study suggests the association of male gender, the relation to lingual and buccal walls, BMI, and age with measurement of swelling.

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