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The title salt, catena-poly [[[bis(ethylenediamine)

The title compound, catena-poly[[[bis(ethylenediamine-κ(2)N,N')platinum(II)]- μ-chlorido-[bis(ethylenediamine)platinum(IV)]-μ-chlorido] tetrakis{4-[(4-hydroxyphenyl)diazenyl]benzenesulfonate} dihydrate], {[Pt(II)Pt(IV)Cl2(C2H8N2)4](HOC6H4N=NC6H4SO3)4·2H2O}n, has a linear chain structure composed of square-planar [Pt(en)2](2+) (en is ethylenediamine) and elongated octahedral trans-[PtCl2(en)2](2+) cations stacked alternately, bridged by Cl atoms, along the b axis. The Pt atoms are located on an inversion centre, while the Cl atoms are disordered over two sites and form a zigzag ...Cl-Pt(IV)-Cl...Pt(II)... chain, with a Pt(IV)-Cl bond length of 2.3140 (14) Å, an interatomic Pt(II)...Cl distance of 3.5969 (15) Å and a Pt(IV)-Cl...Pt(II) angle of 170.66 (6)°. The structural parameter indicating the mixed-valence state of the Pt atom, expressed by δ = (Pt(IV)-Cl)/(Pt(II)...Cl), is 0.643.

Comprehensive and appropriate occlusion reconstruction therapy is necessary for orthodontic treatment of adult patients with malocclusion with periodontal disease associated with occlusal trauma. We report the case of a patient with extensive moderate chronic periodontitis associated with occlusal trauma. The patient was diagnosed with extensive moderate chronic periodontitis associated with occlusal trauma and underwent thorough treatment for periodontal disease, oral management, and 20 months of orthodontic therapy. Moreover, reconstructed occlusion was performed to evaluate occlusal trauma for visualization using Brux Checker (BC) analysis before and after active orthodontic treatment. The patient acquired stable anterior guidance and a functional occlusal relationship. BC findings revealed weakening of the functional contact between the lateral occlusal force of the dentition and the front teeth and alveolar bone regeneration. The laminar dura became clearer, and the periodontal tissue improved. Our results suggest that assessment of occlusion function using BC analysis and periodontal examination was effective in enabling occlusal treatment goal clarification through orthodontic treatment in case of periodontal disease associated with occlusal trauma.

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