Use of cost analysis in examinations of health coaching interventions: a scoping review.

Hypomineralised second primary molars (HSPM) are a qualitative enamel defect that occurs due to disturbances in the mineralisation of second primary molars during tooth development. Clinically, it is characterised by well-demarcated white, yellow, or brown opacities often similar in appearance to molar-incisor hypomineralisation (MIH). The condition and the term HSPM were described in second primary molars in the late 2000s using diagnostic approaches adapted from the European Academy of Paediatric Dentistry (EAPD) MIH criteria. Hypomineralised enamel has a porous and rough structure due to reduced mineral content. This structural weakness may lead to post-eruptive breakdown, particularly under masticatory forces. Such defects facilitate plaque and biofilm accumulation, complicate oral hygiene maintenance due to dentine hypersensitivity, and consequently increase the risk of dental caries. The first studies investigating the prevalence of HSPM based on these diagnostic criteria were conducted in the Netherlands. Globally, the reported prevalence of HSPM varies widely between countries and populations. A meta-analysis by McCarra et al also confirmed a broad range (0–41%), with a pooled global prevalence of 6.8%. Differences in prevalence across studies are thought to be related to variations in diagnostic indices and calibration methods. In Turkey, research on HSPM is limited. In a study conducted in Uşak province, the prevalence was reported as 3.5%. A more recent study conducted in Trabzon province reported that the prevalence of HSPM was found to be 6.8%.