Status of the alveolar bone after autotransplantation of developing premolars to the anterior maxilla assessed by CBCT measurements

Abstract

Background/Aims Autotransplantation of developing premolars is an established treatment to replace missing teeth in the anterior maxilla in growing patients with a reported success rate of over 90%. The normal shape of the alveolus is observed after transplantation, but data on the presence and amount of alveolar bone after healing has not been previously reported. The aim of this study was to look for potential differences in alveolar bone dimensions between sites where autotransplanted premolars replaced missing incisors and control sites of contralateral incisors. Material/Methods There were 11 patients aged between 10 and 12 years five months (mean age: 10 years and 7 months) who underwent autotransplantation of a premolar to replace a central incisor. Cone Beam Computed Tomography (CBCT) performed at least 1 year after transplantation served to evaluate bone at sites of autotransplanted premolars and controls (contralateral maxillary central incisor). The thickness of the labial bone, plus the height and width of the alveolar process were measured on scans and compared at transplant and control sites. Results Mean thicknesses of the labial bone at the transplant and control sites were 0.78 mm and 0.82 mm respectively. Mean alveolar bone height was 15.15 mm at the transplant sites and 15.12 mm at the control sites. The mean marginal thickness of the alveolus was 7.75 mm at the transplant sites and 7.98 mm at the control sites. Mean thicknesses of the alveolus for half of its vertical dimension at the transplant and control sites were 7.54 mm and 8.03 mm, respectively. Conclusion The mean values of bone thickness, width and height of the alveolar process at sites of transplanted premolars were comparable to the mean values for the control incisors. Successful autotransplantation of developing premolars to replace missing central incisors allowed preservation of alveolar bone in the anterior maxilla.

Analysis of the dimensions of buccal and palatal bone wall in the maxillary anterior esthetic zone: a cone-beam computed tomography study

“…In recent years, non-invasive cone-beam computer tomography (CBCT) technology had several advantages in evaluating bone structures around teeth and offers a nancial advantage for the patient [12] . High-resolution images of CBCT can not only measure the bone thickness at the recipient site, but also help to determine the morphological characteristics of the residual alveolar process and evaluate the loss of alveolar bone [13][14][15] and allows full 3D characterization of alveolar bone. Although some CBCT studies have been conducted to analyze bone thickness in maxillary teeth, the information regarding bone thickness combined with age and gender factors in the in uence have been under-represented.…”

Tooth autotransplantation: An umbrella review

“…Compared to other restorative options, AT provides additional advantages such as preservation and growth of alveolar bone dimensions, 36 and potential for regeneration of normal PDL, which facilitates proprioception, allows orthodontic tooth movement, 37 and concurrently confers a satisfactory gingival outcome. Given that implants are not suitable for those who have yet to attain skeletal maturity, 38 AT should rank high on the considerations as a treatment option.…”

Unusual Indications of Teeth Transplantation: A Literature Review

“…The bulk of published literature on dental transplantation describes autogenous transplantation of teeth within various conditions and indications as a reliable treatment option [1][2][3][4][5][6][7][12][13][14][15][16][17][18][19][20][21]. Allogenic dental transplantation cases, where donor and recipient are two different individuals, are scarce in the medical literature due to several reasons.…”

“…Contrariwise, the transplanted tooth can provide space maintenance and alveolar process preservation, even if it is eventually lost [ 19 ]. Plakwicz et al indicated that transplantation of premolars replacing central incisor allowed alveolar bone preservation in the maxilla over long‐term follow-up periods [ 20 ]. Sönmez et al reported an unusual case in which they considered autotransplantation of a primary canine as a temporary space maintainer in an eight-year-old child who lost her permanent maxillary central incisor [ 21 ].…”

“…Continued premolar root development was observed, and this was associated with alveolar process regeneration and complete eruption of the transplanted tooth [ 43 ]. Preservation of the alveolar bone after successful autotransplantation was reported over long-term follow-ups [ 20 ]. In this context, a derivative of enamel matrix, i.e., Emdogain®, claimed to stimulate differentiation of osteoblasts and proliferation of pre-odontoblast, was tested by topical application into the transplanted tooth root [ 44 ].…”