Article published from the Dental Trauma Guide research group

Authors. Abdulaziz Gul | Eva Lauridsen | Thomas A. Gerds | Lars Andersson


There are few lang-term clinical follow-up studies on human teeth replanted immediately or after storage in a suitable storage medium prior to replanta­tion. This study aimed to assess the risk of ankylosis in avulsed human teeth replanted immediately or after storage in physiological media for a short time.

Data from 116 patients with 145 replanted avulsed permanent teeth were selected from a comprehensive dental trauma database in Capenhagen University Hospital. The following teeth were selected: Group 1 comprised 36 teeth replanted immediately (dry time <6 min; wet time <6 min). Gro up 2 comprised 61 teeth replanted after physiologic storage media (saliva and saline) (dry time <6 min; wet time >5 min; wet time ranged from 7 to 170 min, and mean wet time was 59 min). Gro up 3 (control) included 48 teeth replanted after dry storage (dry time> 60 min). .

Clinical and radiographic registrations were carried out according to a standardized protocol; follow-up ranged from 7 months to 23 years. Ankylosis was diagnosed by percussion test and radiographs and related to the conditions prior to replantation and stage of root development.

The overall risk of ankylosis was 17.2% [95% Cl: 4.61; 29.79] for immediately replanted teeth, 55.3% [95% Cl: 42.54; 68.00] for teeth stored in physiologic media befare replantation, and 85.7% [95% Cl: 75.70; 95.73] for teeth stored dry more than 1 h. Mature teeth showed a significantly higher risk of ankylosis than immature teeth.

This clinical lang-term study has verified earlier experimental studies showing that immediate reimplantation has the lowest risk of ankylosis. Physiologic storage media are good alternatives that also reduce the risk of ankylosis compared to dry storage, where ankylosis is more likely although not always seen. Mature teeth are significantly more likely to develop ankylosis.

ankylosis, avulsion, replacement resorption, replantation, root resorption, traumatic dental injury

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© 2023 The Authors. Dental Traumatology published by John Wiley & Sons Ltd.

Abdulaziz Gul: Department of Oral and Maxillofacial Surgery, Malmii University, Malmii, Sweden and Department of Oral and Maxillofacial Surgery and Diagnostic Sciences, Faculty of Dentistry, Umm AI-Qura University, Makkah, Saudi Arabia
Eva Lauridsen: Resource Centre for Rare Oral Diseases Department of Oral and Maxillo-Facial Surgery, Copenhagen University Hospital, Copenhagen, Denmark
Thomas A. Gerds: Department of Biostatistics, University of Copenhagen, Copenhagen, Denmark
Lars Andersson: Department of Oral and Maxillofacial Surgery and Oral Medicine, Malmö University, Malmö, Sweden