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Biomechanical Evaluation of a Mandibular Spanning Plate Technique Compared to Standard Plating Techniques to Treat Mandibular Symphyseal Fractures.

Richardson M, Hayes J, Jordan JR, Puckett A, Fort M - Surg Res Pract (2015)

Bottom Line: The two parallel plates' group showed statistically significant lower values for peak load and stiffness compared to all other groups.No statistically significant difference was found for peak load and stiffness between the control (C) group, lag screw (LS) group, and the spanning plate (SP1) group.Conclusions.

View Article: PubMed Central - PubMed

Affiliation: University of Mississippi Medical Center, Department of Otolaryngology and Communicative Sciences, 2500 N. State Street, Jackson, MS 39216, USA.

ABSTRACT
Purpose. The purpose of this study is to compare the biomechanical behavior of the spanning reconstruction plate compared to standard plating techniques for mandibular symphyseal fractures. Materials and Methods. Twenty-five human mandible replicas were used. Five unaltered synthetic mandibles were used as controls. Four experimental groups of different reconstruction techniques with five in each group were tested. Each synthetic mandible was subjected to a splaying force applied to the mandibular angle by a mechanical testing unit until the construct failed. Peak load and stiffness were recorded. The peak load and stiffness were analyzed using ANOVA and the Tukey test at a confidence level of 95% (P < 0.05). Results. The two parallel plates' group showed statistically significant lower values for peak load and stiffness compared to all other groups. No statistically significant difference was found for peak load and stiffness between the control (C) group, lag screw (LS) group, and the spanning plate (SP1) group. Conclusions. The spanning reconstruction plate technique for fixation of mandibular symphyseal fractures showed similar mechanical behavior to the lag screw technique when subjected to splaying forces between the mandibular gonial angles and may be considered as an alternative technique when increased reconstructive strength is needed.

No MeSH data available.


Related in: MedlinePlus

Two parallel plates plus spanning plate (SP1).
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Related In: Results  -  Collection


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fig3: Two parallel plates plus spanning plate (SP1).

Mentions: The two parallel plates' (2PP) group was fixed with a 4-hole 0.6 mm thick miniplate secured to the superior border with four 1.7 mm outer diameter screws each being 4 mm long. The inferior border was fixed with the larger 4-hole 1.5 mm thick mandibular miniplate and secured with four 2.0 mm outer diameter screws each being 10 mm long (Figure 2). The 2PP plus spanning plate (SP1) group was fixed in a similar fashion as the two parallel plates' group with the addition of a straight 12-hole 1.5 mm thick plate spanning between the inferior borders of the mandibular body. This plate was secured using four 1.7 mm outer diameter screws each being 4 mm long (Figure 3). The second-spanning plate (SP2) group was fixed in a similar fashion to SP1 group with respect to the spanning plate, but with a 6-hole (3 holes × 2 holes) ladder plate rather than two parallel plates (Figure 4). The lag screw (LS) group was fixed with two 30 mm long 2.0 mm diameter self-tapping screws by the lag screw technique (Figure 5).


Biomechanical Evaluation of a Mandibular Spanning Plate Technique Compared to Standard Plating Techniques to Treat Mandibular Symphyseal Fractures.

Richardson M, Hayes J, Jordan JR, Puckett A, Fort M - Surg Res Pract (2015)

Two parallel plates plus spanning plate (SP1).
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4663366&req=5

fig3: Two parallel plates plus spanning plate (SP1).
Mentions: The two parallel plates' (2PP) group was fixed with a 4-hole 0.6 mm thick miniplate secured to the superior border with four 1.7 mm outer diameter screws each being 4 mm long. The inferior border was fixed with the larger 4-hole 1.5 mm thick mandibular miniplate and secured with four 2.0 mm outer diameter screws each being 10 mm long (Figure 2). The 2PP plus spanning plate (SP1) group was fixed in a similar fashion as the two parallel plates' group with the addition of a straight 12-hole 1.5 mm thick plate spanning between the inferior borders of the mandibular body. This plate was secured using four 1.7 mm outer diameter screws each being 4 mm long (Figure 3). The second-spanning plate (SP2) group was fixed in a similar fashion to SP1 group with respect to the spanning plate, but with a 6-hole (3 holes × 2 holes) ladder plate rather than two parallel plates (Figure 4). The lag screw (LS) group was fixed with two 30 mm long 2.0 mm diameter self-tapping screws by the lag screw technique (Figure 5).

Bottom Line: The two parallel plates' group showed statistically significant lower values for peak load and stiffness compared to all other groups.No statistically significant difference was found for peak load and stiffness between the control (C) group, lag screw (LS) group, and the spanning plate (SP1) group.Conclusions.

View Article: PubMed Central - PubMed

Affiliation: University of Mississippi Medical Center, Department of Otolaryngology and Communicative Sciences, 2500 N. State Street, Jackson, MS 39216, USA.

ABSTRACT
Purpose. The purpose of this study is to compare the biomechanical behavior of the spanning reconstruction plate compared to standard plating techniques for mandibular symphyseal fractures. Materials and Methods. Twenty-five human mandible replicas were used. Five unaltered synthetic mandibles were used as controls. Four experimental groups of different reconstruction techniques with five in each group were tested. Each synthetic mandible was subjected to a splaying force applied to the mandibular angle by a mechanical testing unit until the construct failed. Peak load and stiffness were recorded. The peak load and stiffness were analyzed using ANOVA and the Tukey test at a confidence level of 95% (P < 0.05). Results. The two parallel plates' group showed statistically significant lower values for peak load and stiffness compared to all other groups. No statistically significant difference was found for peak load and stiffness between the control (C) group, lag screw (LS) group, and the spanning plate (SP1) group. Conclusions. The spanning reconstruction plate technique for fixation of mandibular symphyseal fractures showed similar mechanical behavior to the lag screw technique when subjected to splaying forces between the mandibular gonial angles and may be considered as an alternative technique when increased reconstructive strength is needed.

No MeSH data available.


Related in: MedlinePlus