In-vitro Evaluation of Fracture Strength Recovery of Reattached Anterior Fractured Tooth Fragment Using Different Re-Attachment Techniques.
BACKGROUND
Traumatic injuries caused to anterior teeth are most common. Emergency management of fractured fragments is necessary, for preserving their vitalities and for retaining aesthetics in an economical way. Various methods are available for restoring fractured, uncomplicated teeth, such as reattachment of fractured fragments, composite restoration. But only limited data is available on evaluation of the strength of reattached fractured fragments. Hence, the present study was designed.


OBJECTIVE
The objective of this study was to evaluate the fracture strength recovery of re-attached anterior fractured tooth fragment by using different re-attachment techniques.


METHODS
Forty human upper central incisions were used in this study. The roots of the teeth were confined in a special device (holder) and adapted in a Universal Testing Machine. Load was applied to each tooth in bucco-lingual direction, by using a small stainless steel ball. The force which was required to fracture the tooth was recorded. Both the fragment and remaining fractured tooth was restored by using four reattachment techniques - simple reattachment, external chamfer, over contour and internal dentinal groove. Specimens were loaded in same pre-determined area which was used in procedure to obtain fragments. The force required to detach each fragment was recorded and it was correlated with the fracture strength of an intact tooth and that which was obtained after doing restorative procedures for all groups i.e. fracture strength recovery.


RESULTS
Technique I (simple reattachment) and Technique 2 (external chamfer) showed fracture strength recoveries of 44.3% and 60.6% respectively. However, these values were lower than those which were obtained by usingTechnique 3 (Over contour) -86.8% and Technique 4 (internal dentinal groove) -89.5%.


CONCLUSIONS
Over contour and internal dentinal groove reattachment is a preferred technique as compared to the other reattachment techniques which were tested.
Associate Professor, Department of Operative Dentistry College of Dentistry, Taibha University , Al-Madinah Al- Munawwarah, KSA .
Abdulmujeeb
A
Abdulkhayum
Reader, Department of Periodontics, Dental College Azamgarh , UP, India .
Sumit
S
Munjal
Professor,Department of Pedodontics, Vyas Dental College , Jodhpur, India .
Prashant
P
Babaji
Post Graduate Student, Department of Conservative Dentistry and Endodontics, KLE'S Dental College , Belgaum, Karnataka, India .
Vishwajit Rampratap
VR
Chaurasia
Reader, Department of Prosthodontics, Dental College Azamgarh, UP, India .
Seema
S
Munjal
Reader, Department of Conservative Dentistry and Endodontics, Maharana Pratap Dental College , Gwalior, Madya Pradesh, India .
Himani
H
Lau
Reader, Department of Oral Pathology and Microbiology, New Horizon Dental College and Research Institute Bilaspur, Chattisgarh, India .
Santosh T
ST
Olekar
Senior Lecturer, Department of Prosthodontics, Maharana Pratap Dental College , Gwalior, Madhya Pradesh, India .
Mayank
M
Lau
External chamfer; Fracture strength recovery; Internal dentinal groove; Over contour; Reattachment techniques