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Summary

The Main Objective of the study was to determine the extent of external apical root resorption at the end of orthodontic treatment and to identify the possible pre-treatment and treatment factors that would allow to predict the possible incidence of root resorption before the start of treatment.

Patients and Methods: Panoramic radiographs of 75 patients that had been treated with full fixed appliances were used to assess apical root resorption in maxillary incisors. The degree of root resorption was measured in millimetres and the scale of Shape was used.

Results: The results showed that the resorption in the maxillary incisors is on the average 1.5 mm, the severe resorption was seen in 2.6% of patients. The worst resorption was seen in teeth with abnormal root shape. There were no differences in the severity of root resorption when comparing males and females as well as children and adults. Increased overjet, overbite and extraction therapy were not associated with greater root resorption. Duration of treatment and length of treatment time with rectangular wires were associated with greater root resorption. Patients wearing composite brackets with a metal slot had more resorption than patients wearing metal brackets.

Conclusion: Pre-treatment risk indicator for root resorption was abnormal root shape. Risk indicators for root resorption that were related to treatment procedures included length of treatment time with rectangular wires, duration of treatment and treatment with composite brackets with a metal slot.

Key words: Root Resorption; Orthodontic Treatment; Risk Factors.

Received: 10 07 2006

Accepted for publishing: 26 09 2006

¹CityMed Dental Clinic. Tallinn, Estonoa

²Department of Stomatology, University of Tartu, Estonia

Kirsten Nigul¹ – D.D.S.

Triin Jagomagi² – D.D.S., MSc, MOrh RCSEd, lecturer

Address correspondence to Kirsten Nigul, CityMed Dental Clinic, Kuhlbarsi 6-9, Tallinn 10128, Estonia.

E-mail: kirsten@citymed.ee



	Baltic Dental and Maxillofacial Journal

September, 2006, Vol. 8, No. 3 CONTENTS SCIENTIFIC ARTICLES Evaluation of diametral tensile strength and knoop microhardness of five nanofilled composites in dentin and enamel shades 67-69 A scanning electron microscopic study of debris and smear layer remaining following use of AET instruments and K-flexofiles 70-75 Factors related to apical root resorption of maxillary incisors in orthodontic patients 76-79 Effect of the lower third molars on the lower dental arch crowding 80-84 Changes in the periodontal condition after replacement of swaged crowns by metal 85-87 Surgical lengthening of the clinical tooth crown 88-95 The relationship between blood serum lipids and periodontal condition 96-100 © 2006 Stomatologija		Stomatologija 2006; 8 (3): 76-79 194 KB Factors related to apical root resorption of maxillary incisors in orthodontic patients Kirsten Nigul, Triin Jagomagi Summary The Main Objective of the study was to determine the extent of external apical root resorption at the end of orthodontic treatment and to identify the possible pre-treatment and treatment factors that would allow to predict the possible incidence of root resorption before the start of treatment. Patients and Methods: Panoramic radiographs of 75 patients that had been treated with full fixed appliances were used to assess apical root resorption in maxillary incisors. The degree of root resorption was measured in millimetres and the scale of Shape was used. Results: The results showed that the resorption in the maxillary incisors is on the average 1.5 mm, the severe resorption was seen in 2.6% of patients. The worst resorption was seen in teeth with abnormal root shape. There were no differences in the severity of root resorption when comparing males and females as well as children and adults. Increased overjet, overbite and extraction therapy were not associated with greater root resorption. Duration of treatment and length of treatment time with rectangular wires were associated with greater root resorption. Patients wearing composite brackets with a metal slot had more resorption than patients wearing metal brackets. Conclusion: Pre-treatment risk indicator for root resorption was abnormal root shape. Risk indicators for root resorption that were related to treatment procedures included length of treatment time with rectangular wires, duration of treatment and treatment with composite brackets with a metal slot. Key words: Root Resorption; Orthodontic Treatment; Risk Factors. Received: 10 07 2006 Accepted for publishing: 26 09 2006 ¹CityMed Dental Clinic. Tallinn, Estonoa ²Department of Stomatology, University of Tartu, Estonia Kirsten Nigul¹ – D.D.S. Triin Jagomagi² – D.D.S., MSc, MOrh RCSEd, lecturer Address correspondence to Kirsten Nigul, CityMed Dental Clinic, Kuhlbarsi 6-9, Tallinn 10128, Estonia. E-mail: kirsten@citymed.ee