THE INFLUENCE OF THE NASAL SEPTAL CARTILAGE AND THE ZYGOMATIC ARCH ON �THE FACIAL DEVELOPMENT IN RATS
Abstract
THE ROLE OF THE CARTILAGINOUS NASAL SEPTUM AND THE ZYGOMATIC ARCH AS INFLUENTIAL FACTORS IN FACIAL GROWTH HAS RECEIVED CONSIDERABLE ATTENTION IN THE LITERATURE. THIS STUDY WAS DESIGNED TO EVALUATE (USING A CEPHALOMETRIC RADIOGRAPHICTECHNIQUE) THE EFFECTS OF TWO OPERATIVE PROCEDURES ON POSTNATAL CRANIOFACIALGROWTH IN RATS, I.E. AFTER PARTIAL EXTIRPATION OF THE NASAL SEPTUM AND AFTERBILATERAL PARTIAL RESECTION OF THE ZYGOMATIC ARCH. IN THIS INVESTIGATION 68 HEALTHY FEMALE WISTAR RATS, APPROXIMATELY 22 DAYS OF AGE, WERE DIVIDED INTO FOUR GROUPS WITH 17 RATS IN EACH. GROUP A UNDERWENT SURGERY FOR ANTERO-POSTERIOR PARTIAL EXTIRPATION OF THE NASAL SEPTAL CARTILAGE. IN GROUP B WE PERFORMED SURGERY FOR THE REMOVAL OF A SECTION FROM THE ZYGOMATIC ARCH BILATERALLY. IN GROUP C BOTH THE NASAL SEPTUM AND ZYGOMATIC ARCHES WERE SECTIONED. GROUP D SERVED AS AN UNOPERATED CONTROL. THE RATS WERE DECAPITATED 48 DAYS AFTER THE SURGICAL PROCEDURE WHEN THEY WERE AT THE AGE OF 70 DAY ...
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