A 38 year old patient was admitted to the orthopaedic department after a therapeutic treatment on account of periodontitis. His anamnesis contains data about frequent recurrences of this disease, acute attacks are accompanied by periodontal abscesses. Objectively: the 42, 41,31, 32 teeth manifest mobility of I-II degree, the 43 and 33 are stable, tooth cervices are dehisced by 1/4, hyperesthesia of hard tooth tissues is not observed. What rational construction of permanent splint should be recommended?