RETN and periodontitis: Although most of our cases were periodontally healthy, salivary resistin levels in our obese cases whether diabetics (14.7 ± 2.8 ng/ml) or nondiabetics (14.4 ± 3.6 ng/ml) were close to the levels reported by Karam and Al-Safi in normal-weight patients with chronic periodontitis (14.45 ± 1.88 ng/ml).