the apparatus ( fig1 ) consists of one single base ( 9 ). in its posterior part and at both sides of the median line are set two towers ( 7 ) that may be adjusted by means of the scale in the base according to the distances right - condyle sagittal plane ( 33 ) and left - condyle sagittal plane ( 35 ) of fig3 . in the upper part of both towers ( 7 ) the condylar elements ( 5 ) are telescopically set that may be adjusted according to the condyles position . the condylar elements ( 5 ) have condylar guides with fixing screws . the base ( 9 ) and the upper section ( 3 ) have a slot in their median line with an antero - posterior direction where the eccentrics ( 4 , 12 ) slide and are fixed . these eccentrics support the platforms ( 19 , 13 ) which by means of a ball joint ( 11 ) placed in its middle , sustain the mandibular ( 14 ) and palatal ( 18 ) plates . the rod ( 10 ) that joins the sphere ( 11 ) with the corresponding plates ( 14 , 18 ) permits adjustment of the required height . with the articulations and adjustment of the height , it is possible to place the plates ( 14 , 18 ) according to the palatal ( 22 ) and the mandibular ( 27 ) planes of fig2 . the occlusal plate ( 17 ) is used to put into position the inferior dental cast in cephalometric relation with the angulation determined by the graduated occlusal plane ( fig4 ). it is placed and adjusted in the leading rods ( 8 , 16 ) guided by the level of the ruler ( 26 ) which transfers the relation of the mandibular ( 27 ) and occlusal ( 25 ) planes of fig2 and the angulation of the occlusal plane ( fig4 ). the upper section ( 3 ) has an elongation ( 2 ) with the entrance of the incisal rod ( 1 ) which lies in the adaptable incisal guide ( 15 ) placed in the anterior part of the base ( 9 ). with the head of the patient in horizontal position , the interchangeable occlusal plate ( 39 ) is placed in centrical occlusion and sagittal median line . the grades are measured in the graduated semi - circle ( 41 ) according to the position of the pendulum ( 42 ). in the lateral teleradiography ( fig2 ) the gonion ( 29 ) the menton ( 28 ), the highest cuspid ( 23 ), the incisal border ( 24 ) and the anterior ( 21 ) and posterior ( 20 ) nasal spine are marked and the mandibular ( 27 ), occlusal ( 25 ) and palatal ( 22 ) planes are outlined . in the antero - posterior teleradiography ( fig3 ) the right and left gonion ( 33 , 36 ) and right and left condyles ( 31 , 37 ) are marked and projection is made of the sagittal plane and the perpendiculars of the different points ( 32 , 34 , 35 , 38 ) to the mentioned sagittal . all the points and planes of the cephalometric analysis are measured with the scale of the ruler ( 26 ) of fig2 . over the lateral tracing ( fig2 ) two patterns of thin metal are cut : an inferior pattern delimined by the mandibular ( 27 ) and the occlusal planes ( 25 ). this profile is marked and cut from its intersection up to approximately two centimeters in front of the mandibular profile obtaining one anterior and one posterior part with the negative mandibular profile ( piece for contour ). the superior pattern is delimited by the occlusal ( 25 ) and the palatal ( 22 ) planes from the posterior nasal spine ( 20 ) to approximately two centimeters in front of the maxillar profile . this profile is marked and cut to obtain two pieces , one anterior and one posterior with the negative maxillar profile ( piece for contour ). the inferior model is casted in horseshoe shape the height not interfering with the mounting . at labial level of the incisive profile , the gum is pared to arrange the setting of the negative mandibular profile patterns . the superior model should also be cast with the height not interfering with the mounting . at face level of the incisive profile , the zone of the gum is pared to arrange the setting of the pattern of the negative maxillar profile . the clinical median line in both models , superior and inferior is marked out . 5 .-- transference of planes and points of the cephalometric analysis and the graduated occlusal plane to the apparatus . use of the cephalometric ruler with level in each of its sections : with the cephalometric ruler ( fig2 ) the mandibular ( 27 ) and the occlusal ( 25 ) planes are taken and fixed . then these are transferred to the apparatus . the mandibular plate ( 14 ) is adjusted until the level of the occlusal section of the ruler is in a horizontal position , then fixing the plate ( 14 ). the occlusal plate ( 17 ) is placed resting over the occlusal section of the ruler setting into position the leading rods ( 8 , 16 ) according to the variation of the angle given by the graduated occlusal plane . with the cephalometric ruler , the angles of the mandibular ( 27 ) and the palatal ( 22 ) planes of fig2 are taken , fixed and transferred to the apparatus adjusting the palatal plate ( 18 ) of fig2 fixing its position . both condylar elements ( 5 ) of the apparatus ( fig1 ) are placed into position transferring the lengths of the perpendiculars ( 32 , 34 , 35 , 38 ) of fig3 by means of the cephalometric ruler . the inferior model is fixed to the occlusal plate ( 17 ) correctly adjusted in the antero - posterior and lateral direction . the occlusal plate is placed into position in the apparatus , fixing the model of the mandibular plate ( 14 ); and then the occlusal plate is removed . the superior model is then connected to the inferior model , already fixed by means of a centrical articulation and the superior model is fixed to the palatal plate ( 18 ). to attach the models to the corresponding plates , wax , modeling compounds or plaster may be used . to make the contour of the mandibular profile , the pattern of the negative mandibular profile is used , placing it over the labial face of the incisive profile and the mandibular plate ( 14 ) marking the position of the menton point ( 28 ) of fig2 in the plate . in the same fashion the contour of the maxillar profile is made using the negative maxillar profile marking in the palatal plane ( 18 ), the position of the anterior nasal spine point ( 21 ) of fig2 . in the mandibular plate ( 14 ), the position of the gonion ( 29 ) is marked in antero - posterior direction according to the length of the mandibular plane as from the menton ( 28 ) of fig2 . in lateral direction , the position of the gonion ( 33 , 36 ) is marked by the length of the perpendicular ( 34 , 35 ) of fig3 . in the palatal plate ( 18 ), the position of the posterior nasal spine ( 20 ) is marked as from the anterior nasal spine ( 21 ) with the length of the palatal plate ( 22 ) of fig2 . the apparatus is formed of a single base ( 9 ) having two towers ( 7 ) set with condylar elements ( 5 ) that support an upper section ( 3 ) that holds the condylar movables . the base and the upper section support both the mandibular ( 14 ) and the palatal ( 18 ) plates with their platforms ( 13 , 18 ). the occlusal plate ( 17 ) is placed between these two plates resting over two leading rods ( 8 , 16 ). an articulated ruler with a level ( 26 ) is used for the transference of cephalometric angles , planes and points . many modifications and variations of the present invention are possible in light of the above teachings . it is , therefore , to be understood that within the scope of the appended claims , the invention may be practiced otherwise than as particularly described .
an apparatus for the production of maxillar models through cephalometric analysis with auxiliary graduated occlusal plane by simplifying the construction of maxillar models and its anatomic relation , obtaining greater exactness in the correction of the dentomaxillofacial anomalies and reducing the time of confection of the models . the apparatus is formed of a single base having two towers set with condylar elements that support an upper section that holds the condylar movables . the base and the upper section support both the mandibular and the palatal plates with their platforms . the occlusal plate is placed between these two plates resting over two leading rods . an articulated ruler with a level is used for the transference of cephalometric angles , planes and points .