The Clinical Application Anatomical Research On Mandibular Canal In Dental Implantation

ObjectiveTo explore the anatomical characteristics of the normal adult mandible and themandibular canal traveling, through the measurement of the anatomy of mandibe andthree-dimensional reconstruction of DCT, Put forward the prevention of inferior alveolarnerve injury, to expand the dental implant of surgery indications and improve the successrate of dental implants. Then provide a reliable technical support for clinical dentalimplants.Methods28cases of mandibular specimens perfusion mandibular canal model after thecompletion of the first measurement of the mandibular alveolar protrusion thickness below1cm and then cut the the mandibular buccal and lingual bone plate with dental grindingmachine to exposed the mandibular canal, the cutting line is not lower than thecorresponding projection position of the mandibular canal in the mandibular buccal andlingual bone plates. Clean cancellous bone to exposed the mandibular canal, stripping andexposed each root tip of the mandibular posterior teeth. Observe the mandibular canalTraveling and the relationship with the surrounding tissue. Directly measure the relevantdata of the mandibular canal, the data packet reordering, each measure were repeatedlythree times, whichever is the average number of recorded. measure Image and3Dreconstruction of image data on50healthy adults. In the DCT software workstation，measuringside plate thickness on mandibular buccal and tongue side plate thick, alveolarthickness, distance from mandible canal buccal wall to mandible lateral plate, distancefrom mandible canal lingual wall to mandible lingual plate, distance from mandible canalupper wall to alveolar ridge, distance from mandible canal lower wall to mandible inferiormargin, mandible canal diameter between Buccal and lingual wall, mandible canaldiameter between upper and lower wall. Results1. The surface of mandibular hard dense bone, internal for cancellous bone, makingthe lateral plate mandibular bone thick, the thickness of each partition is more than2mm,the thickest part of the bone cortex thickness even more than4mm. It can guarantee tobear enormous force. Mandible bone thickness of lingual weaker than the buccal boneplate obviously, especially the molar lingual bone plate is very thin. Mandible bone platelingual by A area (2.74±0.25)mm backward to H area(1.42±0.13) mm has graduallybecome thinner trend.2. From the measurement results that the mandible alveolar ridge below the top1cmplace that the width of A area(11.90±0.44)mm backward to H area(14.24±0.53)mmgradually become the thick, but in the back molar area is decreasing, lateral and lingualbone plate is closer.3. Distance from mandible canal buccal wall to mandible lateral plate is bigger thanDistance from mandible canal lingual wall to mandible lingual plate, and the change isvery clear. In the second premolar section they have a similar distance, all in5mm,but thedistance from mandible canal to buccal board is increased gradually towards the back, thenumber in the second molar mesia section is biggest, specimens (6.76±0.35) mm, images(6.46±0.58) mm, and then showing the distance gradually decreasing trend. The distanceof the mandibular canal to the lingual bone plate on the contrary, with the backwardtraveling, The distance from mandibular canal to the mandibular lingual bone platesignificantly reduced, even mandibular lateral plate.4. Distance from mandible canal upper wall to alveolar ridge, the second premolarfor (17.50±1.63)mm backward to the third molars far-central area(9.58±0.97)mm, showingdecreasing trend. Distance from mandible canal lower wall to mandible inferior margin inthe second premolar area for (9.82±1.26) mm backward to the third molars far central(13.52±1.93) mm, a trend of increase gradually.5. There have statistical differences between mandible canal diameter between buccaland lingual wall, mandible canal diameter between upper and lower wall. mandible canaldiameter longitudinal section pattern for the slightly long oval. Before the second molarthe diameter of vertical and horizontalis no statistical difference. From the samples in thesection measuring observation of the mandible canal cross-sectional close to circle. 6. The distance from bilateral molar distal root to mandible canal minimum in thethird molar area (0.32±0.47) mm, forward gradually larger, in the first molar mesial rootto the maximum value of the measuring section for (3.29±1.74) mm.Conclusion1. In mandibular periodontal region dental implant according to normal anatomicalposition is slightly biased to the buccal side of the inclined can reduce the damage to theinferior alveolar nerve.2. Healthy adult mandibular posterior region planted, to avoid the implant damage orextrusion of the mandibular canal, control the depth of implant in alveolar bone less than13mm.