A 43-year-old patient complains of tooth mobility and considerable dehiscence of dental cervices of the lower jaw in its frontal part. Objectively: gums in the area of the 44, 43, 42, 41, 31, 32, 33, 34 teeth are pale, slightly cyanotic, without hemorrhage. The 42, 41, 31, 32 teeth have mobility of the I-II-degree. There is also overcrowding of the 42, 41, 31, 32 teeth. Cervices of the 42, 41, 31, 32 teeth are dehisced by 1/2 of root length, of the 43, 33 - by 1/4. What orthopaedic construction should be applied in this case?